Can anyone tell me what this component is (goes to an AC motor)?
$begingroup$
Does anyone know what this is? What do I replace it with?
This is from an old Wolf belt sander 5573 (which became the Makita 9401 I think) which was running, then just stopped. I checked the AC motor out (I think it's a universal motor) and it seemed OK. This thing was pretty bulged and smelled when I tried it again. It has the live and neutral as input directly from the switch and outputs three wires to the motor (the middle earth wire goes to the body of the stator).
Many thanks.
capacitor identification
edited 3 hours ago
SamGibson
11k41637
asked 4 hours ago
LeoLeo
132
New contributor
Leo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
$begingroup$
Does anyone know what this is? What do I replace it with?
This is from an old Wolf belt sander 5573 (which became the Makita 9401 I think) which was running, then just stopped. I checked the AC motor out (I think it's a universal motor) and it seemed OK. This thing was pretty bulged and smelled when I tried it again. It has the live and neutral as input directly from the switch and outputs three wires to the motor (the middle earth wire goes to the body of the stator).
Many thanks.
capacitor identification
edited 3 hours ago
SamGibson
11k41637
asked 4 hours ago
LeoLeo
132
New contributor
Leo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
1
$begingroup$
It's a capacitor of some sort, I think.
$endgroup$
– Hearth
4 hours ago
1
$begingroup$
From the values (in $mu$F) and diagram, it's a capacitor. If it's the problem its a run capacitor and your motor is an induction motor. For a belt sander, it's likely it's an induction motor.
$endgroup$
– TimWescott
4 hours ago
$begingroup$
This needs to be moved to a repair group, but I don't know which one to suggest...
$endgroup$
– TimWescott
4 hours ago
1
$begingroup$
Sparky has it- It's three capacitors, not one.
$endgroup$
– Brian Drummond
4 hours ago
add a comment |
$begingroup$
Does anyone know what this is? What do I replace it with?
This is from an old Wolf belt sander 5573 (which became the Makita 9401 I think) which was running, then just stopped. I checked the AC motor out (I think it's a universal motor) and it seemed OK. This thing was pretty bulged and smelled when I tried it again. It has the live and neutral as input directly from the switch and outputs three wires to the motor (the middle earth wire goes to the body of the stator).
Many thanks.
capacitor identification
edited 3 hours ago
SamGibson
11k41637
asked 4 hours ago
LeoLeo
132
New contributor
Leo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
Does anyone know what this is? What do I replace it with?
This is from an old Wolf belt sander 5573 (which became the Makita 9401 I think) which was running, then just stopped. I checked the AC motor out (I think it's a universal motor) and it seemed OK. This thing was pretty bulged and smelled when I tried it again. It has the live and neutral as input directly from the switch and outputs three wires to the motor (the middle earth wire goes to the body of the stator).
Many thanks.
capacitor identification
capacitor identification
edited 3 hours ago
SamGibson
11k41637
asked 4 hours ago
LeoLeo
132
New contributor
Leo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 3 hours ago
SamGibson
11k41637
asked 4 hours ago
LeoLeo
132
New contributor
Leo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 3 hours ago
SamGibson
11k41637
edited 3 hours ago
SamGibson
11k41637
edited 3 hours ago
SamGibson
11k41637
11k41637
asked 4 hours ago
LeoLeo
132
New contributor
Leo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 4 hours ago
LeoLeo
132
asked 4 hours ago
LeoLeo
132
132
New contributor
Leo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Leo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Leo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
1
$begingroup$
It's a capacitor of some sort, I think.
$endgroup$
– Hearth
4 hours ago
1
$begingroup$
From the values (in $mu$F) and diagram, it's a capacitor. If it's the problem its a run capacitor and your motor is an induction motor. For a belt sander, it's likely it's an induction motor.
$endgroup$
– TimWescott
4 hours ago
$begingroup$
This needs to be moved to a repair group, but I don't know which one to suggest...
$endgroup$
– TimWescott
4 hours ago
1
$begingroup$
Sparky has it- It's three capacitors, not one.
$endgroup$
– Brian Drummond
4 hours ago
add a comment |
1
$begingroup$
It's a capacitor of some sort, I think.
$endgroup$
– Hearth
4 hours ago
1
$begingroup$
From the values (in $mu$F) and diagram, it's a capacitor. If it's the problem its a run capacitor and your motor is an induction motor. For a belt sander, it's likely it's an induction motor.
$endgroup$
– TimWescott
4 hours ago
$begingroup$
This needs to be moved to a repair group, but I don't know which one to suggest...
$endgroup$
– TimWescott
4 hours ago
1
$begingroup$
Sparky has it- It's three capacitors, not one.
$endgroup$
– Brian Drummond
4 hours ago
1
1
$begingroup$
It's a capacitor of some sort, I think.
$endgroup$
– Hearth
4 hours ago
$begingroup$
It's a capacitor of some sort, I think.
$endgroup$
– Hearth
4 hours ago
1
1
$begingroup$
From the values (in $mu$F) and diagram, it's a capacitor. If it's the problem its a run capacitor and your motor is an induction motor. For a belt sander, it's likely it's an induction motor.
$endgroup$
– TimWescott
4 hours ago
$begingroup$
From the values (in $mu$F) and diagram, it's a capacitor. If it's the problem its a run capacitor and your motor is an induction motor. For a belt sander, it's likely it's an induction motor.
$endgroup$
– TimWescott
4 hours ago
$begingroup$
This needs to be moved to a repair group, but I don't know which one to suggest...
$endgroup$
– TimWescott
4 hours ago
$begingroup$
This needs to be moved to a repair group, but I don't know which one to suggest...
$endgroup$
– TimWescott
4 hours ago
1
1
$begingroup$
Sparky has it- It's three capacitors, not one.
$endgroup$
– Brian Drummond
4 hours ago
$begingroup$
Sparky has it- It's three capacitors, not one.
$endgroup$
– Brian Drummond
4 hours ago
add a comment |
1 Answer
1
active
oldest
votes
$begingroup$
It is 3 capacitors used as noise/EMI filters, with one across the hot wire and neutral with an 'x' rating and a value of 100nF. Then 2 more capacitors with a value of 2.5nF with a 'y' rating from hot and neutral to Earth ground. They are rated for 250 VAC. The roll-off frequency is given as 1.6MHZ.
The 40174 S? maybe the part number. The last numbers are the date code.
NOTE: You need just 1 of 100nF 'x' rated tied from hot to neutral. The 2 2.5nF 'y' rated caps tie to Earth ground, then one spare lead goes to the 'hot' wire, often black in color, the other spare lead goes to neutral, often white. Earth ground is green or green with yellow stripe. These capacitors have no polarity, as they are rated for AC voltage. To be legit you should buy capacitors with the 'X' and 'Y' ratings, they are important.
simulate this circuit – Schematic created using CircuitLab
answered 4 hours ago
Sparky256Sparky256
11.5k21635
$endgroup$
$begingroup$
Thanks Sparky, that's very informative. Is this a start capacitor or run capacitor or both? I'm wondering if it's strictly necessary or can I just wire the switch directly to the motor? I am at a loss to know how to get a replacement at this point. Is there a modern alternative I could replace it with do you think? Thanks for the help.
$endgroup$
– Leo
4 hours ago
$begingroup$
This cluster of capacitors are for noise filtering only. Start/Run capacitors have 100 times the value of the 'x' capacitor. You could buy them individually and wrap them in electrical tape. Not rated for damp weather unless you seal it all in a rubber epoxy.
$endgroup$
– Sparky256
3 hours ago
$begingroup$
So I'd need 3 x 100nF capacitors and 2 x 2.5nF capacitors? I'm a little confused as to how they'd be wired up.
$endgroup$
– Leo
3 hours ago
$begingroup$
I added some details to my answer.
$endgroup$
– Sparky256
3 hours ago
$begingroup$
Ok I think I've got you. Can you have a look at this diagram I drew for you? i.imgur.com/NBnnRpm.gif
$endgroup$
– Leo
3 hours ago
|
show 3 more comments
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1 Answer
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1 Answer
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$begingroup$
It is 3 capacitors used as noise/EMI filters, with one across the hot wire and neutral with an 'x' rating and a value of 100nF. Then 2 more capacitors with a value of 2.5nF with a 'y' rating from hot and neutral to Earth ground. They are rated for 250 VAC. The roll-off frequency is given as 1.6MHZ.
The 40174 S? maybe the part number. The last numbers are the date code.
NOTE: You need just 1 of 100nF 'x' rated tied from hot to neutral. The 2 2.5nF 'y' rated caps tie to Earth ground, then one spare lead goes to the 'hot' wire, often black in color, the other spare lead goes to neutral, often white. Earth ground is green or green with yellow stripe. These capacitors have no polarity, as they are rated for AC voltage. To be legit you should buy capacitors with the 'X' and 'Y' ratings, they are important.
simulate this circuit – Schematic created using CircuitLab
answered 4 hours ago
Sparky256Sparky256
11.5k21635
$endgroup$
$begingroup$
Thanks Sparky, that's very informative. Is this a start capacitor or run capacitor or both? I'm wondering if it's strictly necessary or can I just wire the switch directly to the motor? I am at a loss to know how to get a replacement at this point. Is there a modern alternative I could replace it with do you think? Thanks for the help.
$endgroup$
– Leo
4 hours ago
$begingroup$
This cluster of capacitors are for noise filtering only. Start/Run capacitors have 100 times the value of the 'x' capacitor. You could buy them individually and wrap them in electrical tape. Not rated for damp weather unless you seal it all in a rubber epoxy.
$endgroup$
– Sparky256
3 hours ago
$begingroup$
So I'd need 3 x 100nF capacitors and 2 x 2.5nF capacitors? I'm a little confused as to how they'd be wired up.
$endgroup$
– Leo
3 hours ago
$begingroup$
I added some details to my answer.
$endgroup$
– Sparky256
3 hours ago
$begingroup$
Ok I think I've got you. Can you have a look at this diagram I drew for you? i.imgur.com/NBnnRpm.gif
$endgroup$
– Leo
3 hours ago
|
show 3 more comments
$begingroup$
It is 3 capacitors used as noise/EMI filters, with one across the hot wire and neutral with an 'x' rating and a value of 100nF. Then 2 more capacitors with a value of 2.5nF with a 'y' rating from hot and neutral to Earth ground. They are rated for 250 VAC. The roll-off frequency is given as 1.6MHZ.
The 40174 S? maybe the part number. The last numbers are the date code.
NOTE: You need just 1 of 100nF 'x' rated tied from hot to neutral. The 2 2.5nF 'y' rated caps tie to Earth ground, then one spare lead goes to the 'hot' wire, often black in color, the other spare lead goes to neutral, often white. Earth ground is green or green with yellow stripe. These capacitors have no polarity, as they are rated for AC voltage. To be legit you should buy capacitors with the 'X' and 'Y' ratings, they are important.
simulate this circuit – Schematic created using CircuitLab
answered 4 hours ago
Sparky256Sparky256
11.5k21635
$endgroup$
$begingroup$
Thanks Sparky, that's very informative. Is this a start capacitor or run capacitor or both? I'm wondering if it's strictly necessary or can I just wire the switch directly to the motor? I am at a loss to know how to get a replacement at this point. Is there a modern alternative I could replace it with do you think? Thanks for the help.
$endgroup$
– Leo
4 hours ago
$begingroup$
This cluster of capacitors are for noise filtering only. Start/Run capacitors have 100 times the value of the 'x' capacitor. You could buy them individually and wrap them in electrical tape. Not rated for damp weather unless you seal it all in a rubber epoxy.
$endgroup$
– Sparky256
3 hours ago
$begingroup$
So I'd need 3 x 100nF capacitors and 2 x 2.5nF capacitors? I'm a little confused as to how they'd be wired up.
$endgroup$
– Leo
3 hours ago
$begingroup$
I added some details to my answer.
$endgroup$
– Sparky256
3 hours ago
$begingroup$
Ok I think I've got you. Can you have a look at this diagram I drew for you? i.imgur.com/NBnnRpm.gif
$endgroup$
– Leo
3 hours ago
|
show 3 more comments
$begingroup$
It is 3 capacitors used as noise/EMI filters, with one across the hot wire and neutral with an 'x' rating and a value of 100nF. Then 2 more capacitors with a value of 2.5nF with a 'y' rating from hot and neutral to Earth ground. They are rated for 250 VAC. The roll-off frequency is given as 1.6MHZ.
The 40174 S? maybe the part number. The last numbers are the date code.
NOTE: You need just 1 of 100nF 'x' rated tied from hot to neutral. The 2 2.5nF 'y' rated caps tie to Earth ground, then one spare lead goes to the 'hot' wire, often black in color, the other spare lead goes to neutral, often white. Earth ground is green or green with yellow stripe. These capacitors have no polarity, as they are rated for AC voltage. To be legit you should buy capacitors with the 'X' and 'Y' ratings, they are important.
simulate this circuit – Schematic created using CircuitLab
answered 4 hours ago
Sparky256Sparky256
11.5k21635
$endgroup$
It is 3 capacitors used as noise/EMI filters, with one across the hot wire and neutral with an 'x' rating and a value of 100nF. Then 2 more capacitors with a value of 2.5nF with a 'y' rating from hot and neutral to Earth ground. They are rated for 250 VAC. The roll-off frequency is given as 1.6MHZ.
The 40174 S? maybe the part number. The last numbers are the date code.
NOTE: You need just 1 of 100nF 'x' rated tied from hot to neutral. The 2 2.5nF 'y' rated caps tie to Earth ground, then one spare lead goes to the 'hot' wire, often black in color, the other spare lead goes to neutral, often white. Earth ground is green or green with yellow stripe. These capacitors have no polarity, as they are rated for AC voltage. To be legit you should buy capacitors with the 'X' and 'Y' ratings, they are important.
simulate this circuit – Schematic created using CircuitLab
answered 4 hours ago
Sparky256Sparky256
11.5k21635
edited 3 hours ago
answered 4 hours ago
Sparky256Sparky256
11.5k21635
answered 4 hours ago
Sparky256Sparky256
11.5k21635
answered 4 hours ago
Sparky256Sparky256
11.5k21635
11.5k21635
$begingroup$
Thanks Sparky, that's very informative. Is this a start capacitor or run capacitor or both? I'm wondering if it's strictly necessary or can I just wire the switch directly to the motor? I am at a loss to know how to get a replacement at this point. Is there a modern alternative I could replace it with do you think? Thanks for the help.
$endgroup$
– Leo
4 hours ago
$begingroup$
This cluster of capacitors are for noise filtering only. Start/Run capacitors have 100 times the value of the 'x' capacitor. You could buy them individually and wrap them in electrical tape. Not rated for damp weather unless you seal it all in a rubber epoxy.
$endgroup$
– Sparky256
3 hours ago
$begingroup$
So I'd need 3 x 100nF capacitors and 2 x 2.5nF capacitors? I'm a little confused as to how they'd be wired up.
$endgroup$
– Leo
3 hours ago
$begingroup$
I added some details to my answer.
$endgroup$
– Sparky256
3 hours ago
$begingroup$
Ok I think I've got you. Can you have a look at this diagram I drew for you? i.imgur.com/NBnnRpm.gif
$endgroup$
– Leo
3 hours ago
|
show 3 more comments
$begingroup$
Thanks Sparky, that's very informative. Is this a start capacitor or run capacitor or both? I'm wondering if it's strictly necessary or can I just wire the switch directly to the motor? I am at a loss to know how to get a replacement at this point. Is there a modern alternative I could replace it with do you think? Thanks for the help.
$endgroup$
– Leo
4 hours ago
$begingroup$
This cluster of capacitors are for noise filtering only. Start/Run capacitors have 100 times the value of the 'x' capacitor. You could buy them individually and wrap them in electrical tape. Not rated for damp weather unless you seal it all in a rubber epoxy.
$endgroup$
– Sparky256
3 hours ago
$begingroup$
So I'd need 3 x 100nF capacitors and 2 x 2.5nF capacitors? I'm a little confused as to how they'd be wired up.
$endgroup$
– Leo
3 hours ago
$begingroup$
I added some details to my answer.
$endgroup$
– Sparky256
3 hours ago
$begingroup$
Ok I think I've got you. Can you have a look at this diagram I drew for you? i.imgur.com/NBnnRpm.gif
$endgroup$
– Leo
3 hours ago
$begingroup$
Thanks Sparky, that's very informative. Is this a start capacitor or run capacitor or both? I'm wondering if it's strictly necessary or can I just wire the switch directly to the motor? I am at a loss to know how to get a replacement at this point. Is there a modern alternative I could replace it with do you think? Thanks for the help.
$endgroup$
– Leo
4 hours ago
$begingroup$
Thanks Sparky, that's very informative. Is this a start capacitor or run capacitor or both? I'm wondering if it's strictly necessary or can I just wire the switch directly to the motor? I am at a loss to know how to get a replacement at this point. Is there a modern alternative I could replace it with do you think? Thanks for the help.
$endgroup$
– Leo
4 hours ago
$begingroup$
This cluster of capacitors are for noise filtering only. Start/Run capacitors have 100 times the value of the 'x' capacitor. You could buy them individually and wrap them in electrical tape. Not rated for damp weather unless you seal it all in a rubber epoxy.
$endgroup$
– Sparky256
3 hours ago
$begingroup$
This cluster of capacitors are for noise filtering only. Start/Run capacitors have 100 times the value of the 'x' capacitor. You could buy them individually and wrap them in electrical tape. Not rated for damp weather unless you seal it all in a rubber epoxy.
$endgroup$
– Sparky256
3 hours ago
$begingroup$
So I'd need 3 x 100nF capacitors and 2 x 2.5nF capacitors? I'm a little confused as to how they'd be wired up.
$endgroup$
– Leo
3 hours ago
$begingroup$
So I'd need 3 x 100nF capacitors and 2 x 2.5nF capacitors? I'm a little confused as to how they'd be wired up.
$endgroup$
– Leo
3 hours ago
$begingroup$
I added some details to my answer.
$endgroup$
– Sparky256
3 hours ago
$begingroup$
I added some details to my answer.
$endgroup$
– Sparky256
3 hours ago
$begingroup$
Ok I think I've got you. Can you have a look at this diagram I drew for you? i.imgur.com/NBnnRpm.gif
$endgroup$
– Leo
3 hours ago
$begingroup$
Ok I think I've got you. Can you have a look at this diagram I drew for you? i.imgur.com/NBnnRpm.gif
$endgroup$
– Leo
3 hours ago
|
show 3 more comments
Leo is a new contributor. Be nice, and check out our Code of Conduct.
Leo is a new contributor. Be nice, and check out our Code of Conduct.
Leo is a new contributor. Be nice, and check out our Code of Conduct.
Leo is a new contributor. Be nice, and check out our Code of Conduct.
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1
$begingroup$
It's a capacitor of some sort, I think.
$endgroup$
– Hearth
4 hours ago
1
$begingroup$
From the values (in $mu$F) and diagram, it's a capacitor. If it's the problem its a run capacitor and your motor is an induction motor. For a belt sander, it's likely it's an induction motor.
$endgroup$
– TimWescott
4 hours ago
$begingroup$
This needs to be moved to a repair group, but I don't know which one to suggest...
$endgroup$
– TimWescott
4 hours ago
1
$begingroup$
Sparky has it- It's three capacitors, not one.
$endgroup$
– Brian Drummond
4 hours ago