9-1423364-8

## **POTTER & BRUMFIELD W57 SERIES** 

COMPACT, PUSH TO RESET ONLY P&B THERMAL CIRCUIT BREAKER 

## FEATURES 

- New, compact design. 

- 3 to 20 amp ratings. 

- Push button to reset breaker. Cannot be manually tripped. 

- Button extends for visual trip indication. 

- Numerous mounting and termination options. 

- Optional bottom marking of amperage rating. 

## APPROVALS 

- UL/cUL: Recognized with UL 1077 (Supplementary Protectors for Use in Electrical Equipment), File E69543. 

- VDE: Approved to DIN EN IEC 60934/VDE 0642 (Circuit Breaker for Equipment), Certificate No. 40059503 and 40007874 (for AC loads only). 

- CCC: Approved to GB/T 17701, Certificate No. 2024010307737424 and 2004010307123217 (for AC loads only) 

## Z 

## **ELECTRICAL DATA @ 25°C** 

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rating. May trip between 101% and Will continuously carry 100% of  1 000900 EE] Overload100% Trip TimesNo Trip<br>Calibration 134%, but must trip at 135% of  800 200%135% 4.0 - 40.0 Sec.Trip in 1 hour<br>rating within one hour at +25°C. | WOT LTTE TET 300% 1.2 - 12.0 Sec.<br>Dielectric Strength 1,500VAC (60 seconds) 700 AET TT 400%500% 0.6 - 5.0 Sec.0.4 - 2.8 Sec.<br>600% 0.3 - 1.8 Sec.<br>Insulation Resistance 100 megohms 600 aN 800% 0.18 - 0.9 Sec.<br>1000% 0.12 - 0.7 Sec.<br>Maximum Operating  250VAC, 50/60Hz;  500 a<br>Voltages 50VDC (UL Only) 400<br>| SU<br>Interrupt Capacity 1,000 amps in accordance  300 EL<br>with UL standard 1077<br>200 a Se) ||| SS |<br>Resettable Overload Capacity Ten times rated current 10 0135 aETEAIIETE<br>Reset Time 60 seconds 0.1 PE [ETPN] 1 1 0 ee 1 00 SE 1 000 10, 000<br>Time In Seconds<br>Of Breaker Rating<br>Load Current As A Percent<br>**----- End of picture text -----**<br>


**Note:** Users should thoroughly review the technical data before selecting a product part number. It is recommended that users also seek out the pertinent approvals files of the agencies/laboratories and review them to confirm the product meets the requirements for a given application. 

**POTTER & BRUMFIELD W57 SERIES** Thermal Circuit Breaker 

## **TYPICAL RESISTANCE VS. CURRENT RATING @+25°C** 

|**Current**<br>**Rating in**<br>**Amps**<br> <br>**Re**<br>**i**|**Typical**<br>**sistance**<br>**n Ohms**|**Curren**<br>**Rating**<br>**in Amp**|**t**<br> <br>**s**<br>**Typical**<br>**Resistance**<br>**in Ohms**|
|---|---|---|---|
|3.0|0.083|8.0|0.031|
|4.0|0.062|10.0|0.025|
|5.0|0.050|12.0|0.021|
|6.0|0.042|15.0|0.017|
|7.0|0.036|20.0|0.012|



## **MECHANICAL/ENVIRONMENTAL DATA** 

|Operating Temperature Range<br>|0°C to +60°C|
|---|---|
|Termination<br>.2<br>q|50in (6.35mm)<br>uick connects|
|Mounting Various options.<br>See O<br>|rdering Information<br>and drawings|
|Approximate Weight<br>0|.5 oz. (14.3g).|



## **AMBIENT COMPENSATION TABLE** 

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Ambient  Rating Correction Factor<br>Temperature<br>in °C 3-4A Models 5-20A Models<br>**----- End of picture text -----**<br>


|**Ambient**<br>**Temperature**<br>**in °C**|**Rating Correction Factor**|**Rating Correction Factor**|
|---|---|---|
||**3-4A Models**|**5-20A Models**|
|-10|.70|.77|
|0|.75|.85|
|10|.82|.90|
|20|.90|.95|
|25|1.00|1.00|
|30|1.10|1.05|
|40|1.25|1.15|
|50|1.61|1.25|
|60|2.15|1.40|



To use this chart: Divide the breaker rating by the correction factor to determine the compensated rating. 

Calculate the overloads in terms of the compensated rating to use the published trip curve. Do not use these devices outside their specified operating temperature ranges. 

## **OUTLINE DIMENSIONS** 

## **OPTIONAL PROTECTIVE BOOT** 

Silicone rubber boot is bonded to integral metal nut. 

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1-1423696-5<br>Black boot for W57 with<br>3/8inch-24 bushing.<br>1-1423696-6<br>Clear boot for W57 with<br>M11 X 1.0 bushing.<br>1-1423000-1<br>Clear boot for W57 with<br>M11 X 1.0 bushing.<br>**----- End of picture text -----**<br>


## **MOUNTING BUSHINGS AND RECOMMENDED PANEL CUTOUTS** 

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.059 .441+.008, -.0(11.2+.2, -.0) .043 .338(8.6) .346 +.008, -.0(8.8 +.2, -.0) .630±.005(16±.13)<br>(1.5) (1.1)<br>.386 .394+.008, -.0 .382 +.008, -.0 .543±.005<br>(9.8) (10.0+.2, -.0) (9.7 +.2, -.0) (13.8±.13)<br>.378 .394<br>(9.6) (10.0)<br>Option 1 – M11 X 1.0 Thread Option 2 & 6 – 3/8in - 24UNF Thread Option 4 – Snap In Option<br>.441+.008, -.0 .480 +.008, -.0 .382 +.008, -.0<br>.059 (11.2+.2, -.0) .059 (12.2 +.2, -.0) .043 (9.7 +.2, -.0)<br>(1.5) (1.5) (1.1)<br>.386 .394+.008, -.0 .425 .433 +.008, -.0 .303 .311 +.008, -.0<br>(9.8) (10.0+.2, -.0) (10.8) (11.0 +.2, -.0) (7.7) (7.9 +.2, -.0)<br>.378 .378 .394<br>(9.6) (9.6) (10.0)<br>Option 5 – M11 X 1.0 Thread Option 7 – M12 X 1.0 Thread Option 8 – 3/8in - 24UNF Thread<br>**----- End of picture text -----**<br>


INDUSTRIAL AUTOMATION AND ELECTRIFICATION / W57 SERIES 

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**POTTER & BRUMFIELD W57 SERIES** Thermal Circuit Breaker 

## **TERMINATION OPTIONS** 

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.1 54 ±  .01<br>.126  .098 ± .01<br>(3.2) ( 3. 9 ± 0.3) .126 .181  (2.5 ± 0.3) .181<br>(3.2) (4.6) (4.6) .<br>Option A Option C Option D  Option E Option B  Option F or I<br>.250 QC .250 QC .250 QC .250 QC/PCB .250 QC .250 QC/PCB<br>Straight 45° 90° 270° 90 ° 270 °<br>MOUNTING HARDWARE OPTIONS  NAMEPLATES<br>ALTERNATE TEETH TWISTED<br>A A A IN OPPOSITE DIRECTIONS<br> 2 X .059 DIA. (21.7) (24.0)<br> (1.5)<br>A<br>B B 84° 56° B B<br>.016 (.4) THICK .016 (.4) THICK<br>Knurled Nut Hex Nut Integrated Knurled Nut Lockwasher Embossed Imprinted Aluminum<br>with Small Holes Aluminum (Either Silver on Black<br>or Black on Silver)<br>**----- End of picture text -----**<br>


## **MOUNTING HARDWARE DIMENSIONS** 

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Integrated Plastic<br>Dimension  Bushing  Plastic Knurled  Metal Knurled<br>Knurled Nut w/ Metal Hex Nut Lockwasher<br>Code Diameter Nut Nut<br>Holes<br>**----- End of picture text -----**<br>


|**Dimension**<br>**Code**|**Bushing**<br>**Diameter**|**Plastic Knurled**<br>**Nut**<br>|**Integrated Plastic**<br>**Knurled Nut w/**<br>**Holes**|**Metal Knurled**<br>**Nut**|**Metal Hex Nut**|**Lockwasher**|
|---|---|---|---|---|---|---|
||||||||
|A|3/8in|.74 (18.8)|–|.56 (14.2)|.55 (14.0)|.49 (12.5)|
||M11|.74 (18.8)|.74 (18.8)|.59 (15.0)|.55 (14.0)|.587 (14.9)|
||M12|–|–|.59 (15.0)|.55 (14.0)|.626 (15.9)|
|B|3/8in|.126 (3.2)|–|.079 (2.0)|.079 (2.0)|.02 (.5)|
||M11|.126 (3.2)|.13 (3.3)|.102 (2.6)|.118 (3.0)|.02 (.5)|
||M12|–|–|.102 (2.6)|.079 (2.0)|.02 (.5)|



## **MOUNTING HARDWARE ORDERING INFORMATION** 

|**Dimension**<br>**Code**|**Bushing**<br>**Diameter**|**Plastic Knurled**<br>**Nut**<br>|**Integrated Plastic**<br>**Knurled Nut w/**<br>**Holes**|**Metal Knurled**<br>**Nut**|**Metal Hex Nut**|**Lockwasher**|
|---|---|---|---|---|---|---|
|Plastic|1 (M11)|1423696-8|2-1423696-2|1423696-8|-|-|
||2 (3/8in)|1423696-2|-|-|-|-|
|Metal|5 (M11)|–|–|1423696-4|1423696-6|1-1423696-2|
||6 (3/8in)|–|–|1-1423696-0|1423696-3|1-1423696-1|
||7 (M12)|–|–|1423696-5|1423696-7|1-1423696-3|



ORDERING NOTE: 

Mounting hardware can be ordered separately. Some options are subject to extended leadtimes and significant minimum order quantities. 

INDUSTRIAL AUTOMATION AND ELECTRIFICATION / W57 SERIES 

3 

## **PRODUCT CODE STRUCTURE** 

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Typical product code<br>W  57  -X  B  1  A  4  A  1  0  -4<br>Designator Specify Amp Rating<br>W Circuit breaker 3 6 10 20<br>4 7 12<br>Series Number 5 8 15<br>Compact, Single Pole, Push-to-Reset,<br>57 Thermal Model Nameplate<br>0 None<br>Circuit Function & Contact Material 1 Embossed aluminum<br>X Series trip 2 Silver color printing on black<br>3 Black printing on silver color<br>Button Color & Rate Marking:<br>A White, plain, no rate marking Maximum Operating Voltage<br>B White, red rate marking (vertical) 1 250VAC/50VDC*<br>C White, black rate marking (vertical) 2 125VAC/50VDC*<br>D Black, plain, no rate marking *DC rating apply to UL only<br>E Black, white rate marking (horizontal) Mounting Hardware Packaging<br>F White, red rate marking (horizontal) A Assembled to bushing<br>G White, black rate marking (horizontal)<br>B Bulk unassembled<br>H Black, white rate marking (vertical)<br>I Red, plain, no rate marking C No mounting hardware<br>Black, no rate marking on button, white rate<br>J<br>marking on bottom case between terminals. Mounting Hardware<br>Metal<br>Mounting Bushing 4 Knurled nut/hex nut<br>Plastic 6 Hex nut<br>9.8mm (double D) X 9.6mm long, M11x1  12 Knurled nut<br>1<br>threads3/8in (single D) x 10.5mm long, 3/8inx24 , hex base 15 2 metal hex nuts, metal lockwasher<br>2<br>threads, hex base 18 Hex nut, metal lockwasher<br>4 Snap-in type Plastic<br>Metal 7 Knurled nut<br>5 9.8mm (double D) X 9.6mm long, M11x1  8 Knurled nut with small hole<br>6 threads3/8in (single D) x 10.5mm long, 3/8inx24 , round base 9922 Knurled nutNone , metal lockwasher<br>threads, hex base<br>10.8mm (double D) x 9.6mm long, M12x1<br>7 threads, round base Terminals<br>3/8in (double D) x 10.0mm long, 3/8inx24  A Quick connect .250in (6.35mm) straight<br>8<br>threads, hex base B Quick connect .250in (6.35mm), bent 90°<br>C Quick connect .250in (6.35mm), bent 45°<br>Codes 1 and 5 similar in size to 7/16in bushings (not exact equivalent).<br>Code 7 is similar in size to a 15/32in bushing (not exact equivalent) D Quick connect .250in (6.35mm), bent 90°<br>Quick connect .250in (6.35mm), bent 90°,<br>E<br>PCB compatible<br>Quick connect .250in (6.35mm), bent 90°,<br>F<br>PCB compatible<br>Same as F above, but amperage marking<br>I<br>reversed.<br>**----- End of picture text -----**<br>


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07/25   ED 

INDUSTRIAL AUTOMATION AND ELECTRIFICATION / W57 SERIES