W51-A122B1-15

Catalog 1308242 Issued 3-03 (PDF Rev. 08-13) 

Potter & Brumfield 

## W51 series 

## Rocker-Actuated Thermal Circuit Breaker/Power Switch With Optional Indicator Lamp 

## Features 

- Compact, trip-free, rocker-actuated design. 

- 5 to 20 amp ratings. 

- Provides circuit protection and power switching in a single unit. 

Interrupt Capacity:  1,000 amps in accordance with UL standard 1077. Resettable Overload Capacity:  Ten times rated current. Switch Endurance Cycling: Typically 6,000 operations at 100% of rating. Reset Time:  60 seconds. 

- Available with optional indicator lamp. 

- Snaps into the same cutout as many common power switches. 

- Various color, marking and termination options. 

## Agency Approvals 

W51 series is UL 1077 Recognized as Supplementary Protectors, File E69543, for Canada and the United States. Approved to VDE 0642/EN60934 (Circuit Breakers for Equipment) License Number 40017023 (for AC loads only). CCC mark compliant, certificate 2004010307123223. 

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 ensure the product meets the requirements for a given application. 

## Typical Resistance vs. Current Rating @ +25°C 

|Current<br>Rating<br>in Amps<br>5.0<br>6.0<br>7.0<br>8.0|Typical<br>Resistance<br>in Ohms<br>0.050<br>0.042<br>0.036<br>0.031|Current<br>Rating<br>in Amps<br>10.0<br>15.0<br>20.0|Typical<br>Resistance<br>in Ohms<br>0.025<br>0.017<br>0.0125|
|---|---|---|---|



## Electrical Data @ 25°C 

Calibration:  Will continuously carry 100% of rating. 

May trip between 101% and 134%, but must trip at 135%* of rating within one hour at +25°C. * 150% for 5-8A models 

Dielectric Strength: 1,500VAC (60 seconds). Insulation Resistance:  100 megohms. 

Maximum Operating Voltages:  50VDC; 125 or 250VAC, 50/60 Hz. (model dependent). 

## Mechanical/Environmental Data 

Operating Temperature Range:  0°C to +60°C for 10-20A models 

0°C to +50°C for 5-8A models 

Termination:  .250” (6.35mm) quick connects, solder terminals or right angle PC terminals. Mounting:  Snaps into 1.122 x .531 (28.5 x 13.5) panel cutout. Approximate Weight:  0.37 oz. (10.5g). 

Time vs. Current Trip Curve @ +25°C 

## Outline Dimensions 

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Overload Trip Times<br>“hoo (15.2) soe (32.0) v ein<br>90015 100%U No Tripl| (3.0) 1180<br>imWN CCI LTTE 38825 | teoie.Q - . ecwec. | (10.0) sm (21.0) 70<br>2 4MM CITT) eee400% iactzeseg0.6- 5.0 Sec. = Wa ___ Lo<br>ge ™*<br>MIMIC 600% 0.3 - 1.8 Sec.<br>= TTT S22 | 26rd =! th. (21.8) (2.0) G5 Ps<br>ecm, Mls CCITT LILO EL 1, g<br>(31.3)<br>& 4005: NU URNaN  RNTT (NEN AT yn)? °<br>5PealCTI CI Ail 44 O10<br>Be  300/ hh mt ae<br>(8.0)<br>4 Nl a | | |<br>200H Is Sey > eet — .354L YW<br>(6.35) TYP.<br>ash IE iat HIE | TT | 26 (9.90 ev el<br>100BE A eee TYP. (0.8)P4} -*<br>(10.0)<br>0 PEA CITA LTA TMs | E T 2 9 0 (27.9) vom<br>.1 1 10 100 1000 10,000 .504 1.311<br>Time In Seconds (12.8) (33.3)<br>Of Breaker Rating<br>**----- End of picture text -----**<br>


## Ambient Compensation Table 

|Ambient<br>Temperature<br>in °C<br>10<br>20<br>25<br>30<br>40<br>50<br>60|Rating Correction Factor<br>5-8A Models<br>10-20A Models<br>.80<br>.80<br>.90<br>.90<br>1.00<br>1.00<br>1.10<br>1.05<br>1.25<br>1.15<br>1.61<br>1.25<br>1.40|
|---|---|



To use this chart: Divide the breaker rating by the correction f a c t o r t o d e t e r m i n e t h e compensated rating. Calculate the overloads in terms of the compensated rating to use the published trip curve. D o  n o t  u s e  t h e s e  d e v i c e s outside their specified operating temperature ranges. 

## Recommended Panel Cutout 

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PANEL CUTOUT (13.5)<br>y y<br>}«—— (28.5) 1. 1221<br>**----- End of picture text -----**<br>


## Panel Thickness 

W51 series circuit breakers accommodate panel thicknesses from 0.030 in. to 0.118 in. (0.75 mm - 3.0 mm). 

Revised 08-16 Dimensions are in inches over www.te.com (millimeters) unless otherwise specified. 

Dimensions are shown for reference purposes only. Specifications and availability subject to change. 

USA: 1-800-522-6752 South America: 55-11-2103-6000 Canada: 1-905-470-4425 Hong Kong: 852-2735-1628 Mexico: 01-800-733-8926 Japan: 81-44-844-8013 C. America: 52-55-1106-0803 UK: 44-8706-080208 

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Catalog 1308242 Issued 3-03 (PDF Rev. 08-13) 

Potter & Brumfield 

Ordering Information 

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Typical Part No.  > W  51  -A  1  2  1  B  1  -5<br>1. Designator:<br>W = Circuit breaker<br>2. Series Number:<br>51 = Switchable, Single Pole, Rocker-Actuated Thermal Model<br>3. Terminals:<br>A = Quick connect .250” (6.35mm) straight C = Printed Circuit - right angle<br>4. Breaker Style & Base Color:<br>1 = Angular button design (see drawing below), black base color<br>B = Countoured button design (see drawing below), black base color<br>5. Rocker Color:<br>1 = Amber (translucent)<br>2 = Red (translucent)<br>3 = Green (translucent)<br>4 = White (opaque - for use on non-illuminated models)<br>5 = Black (opaque - for use on non-illuminated models)<br>6 = Red (opaque - for use on non-illuminated models)<br>7 = Gray (opaque - for use on non-illuminated models)<br>8 = Black (opaque) with red (translucent) indicator (only available on model with contoured button)<br>9 = Black (opaque) with green (translucent) indicator (only available on model with contoured button)<br>6. Maximum Operating Voltage (AC):<br>1 = 125VAC  2 = 250VAC<br>7. Light:<br>A = Non-illuminated  B = Illuminated<br>8. Marking option:<br>0 = No marking  2 = RESET/OFF molded (only available on model with contoured button)<br>1 = RESET/OFF printed<br>9. Specify Amp Rating:<br>5   6  7  8  10  15  20<br>Our authorized distributors are more likely to stock the following items for immediate delivery.<br>W51-A121B1-5  W51-A121B1-15  W51-A122B1-5  W51-A122B1-15  W51-A152A1-5  W51-A152A1-15<br>W51-A121B1-10  W51-A121B1-20  W51-A122B1-10  W51-A122B1-20  W51-A152A1-10  W51-A152A1-20<br>**----- End of picture text -----**<br>


ORDERING NOTE: Some options illustrated below are not listed in the “Ordering Information” chart above. Options denoted by “Special” or “Special Order” in their descriptions are only offered on a special order basis. Other base and button colors and intermediate amp ratings are also available on a special order basis. All special order items are subject to extended leadtimes and significant minimum order quantities. Your TE sales engineer must consult with the factory before providing price and availability information regarding items with these options. 

## Case Styles 

## Marking Options 

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For Contoured<br>For Angular Button Design Button Design<br>(Printed) (Molded)<br>=a<br>i<br>| L<br>OFF OFF<br>\<br>Standard - Standard - Standard -<br>RESET/OFF No Marking RESET/OFF<br>Printed on  Molded into<br>Bezel  bezel<br>**----- End of picture text -----**<br>


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Angular Button Contoured Button<br>Design Design<br>**----- End of picture text -----**<br>


## Terminal Types 

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(5.2)<br>(9.5) 2) oy (7.55) (6.35)<br>(6.35)<br>ove > (6.35) 28) < 187 (4.0 x 2.5) X 098 (10.0) - ~< (12.8) 504 0 >| ins<br>(2.5 x 4.0)  x 157171 _ |< 60 5.26) 1 (3.95) se<br>(10.0) TERMINAL FOR ALL TYPES   THICKNESSD10320) (.81)  (16.76) 66 __,<br>Standard – Special Order -  Standard –<br>.250 Quick Connect Solder Right Angle PC<br>Terminal Terminal Terminal<br>Revised 08-16 Dimensions are in inches over  Dimensions are shown for reference<br>www.te.com (millimeters) unless otherwise  purposes only. Specifications and<br>specified. availability subject to change.<br>**----- End of picture text -----**<br>


USA: 1-800-522-6752 South America: 55-11-2103-6000 Canada: 1-905-470-4425 Hong Kong: 852-2735-1628 Mexico: 01-800-733-8926 Japan: 81-44-844-8013 C. America: 52-55-1106-0803 UK: 44-8706-080208 

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