Catalog 1308242 Issued 4-15 (PDF Rev. 04-15) Potter & Brumfield W57 series Compact, Push To Reset Only P&B Thermal Circuit Breaker Features Insulation Resistance: 100 megohms. • New, compact design. Maximum Operating Voltages: 50VDC; 250VAC, 50/60 Hz. • 3 to 20 amp ratings. Interrupt Capacity: 1,000 amps in accordance with UL standard 1077. • Cannot be manually tripped. Resettable Overload Capacity: Ten times rated current. • Button extends for visual trip indication. Reset Time: 60 seconds. • Push button to reset breaker. • Numerous mounting and termination options. • Optional bottom marking of amperage rating. Typical Resistance vs. Current Rating @ +25°C Agency Approvals Current Typical Current Typical Rating Resistance Rating Resistance W57 series is UL1077 Recognized as Supplementary Protectors, in Amps in Ohms in Amps in Ohms File E69543, for Canada and the United States. Available models meet Ignition Protection requirements in accordance with UL1500. 3.0 0.083 8.0 0.031 Approved to VDE 0642/EN60934 (Circuit Breakers for Equipment) 4.0 0.062 10.0 0.025 License Number 40007874 (excludes models rated 3-4A and >15A). 5.0 0.050 12.0 0.021 CCC mark compliant, certificate 2004010307123217. 6.0 0.042 15.0 0.017 7.0 0.036 20.0 0.012 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/labora-tories and review them to confirm the product meets the requirements for a given application. Mechanical/Environmental Data Electrical Data @ 25°C Operating Temperature Range: 0°C to +60°C. Calibration: Will continuously carry 100% of rating. Termination: .250” (6.35mm) quick connects. May trip between 101% and 134%, but must trip at 135% of Mounting: Various options. See Ordering Information and drawings. rating within one hour at +25°C. Approximate Weight: 0.5 oz. (14.3g). Dielectric Strength: 1,500VAC (60 seconds). Time vs. Current Trip Curve @ +25°C Outline Dimensions 1000 .465(cid:18) .889(cid:18) .457(cid:18) Overload Trip Times (11.8) (22.6) (11.6) 900 100% No Trip 135% Trip in 1 hour 800 200% 4.0 - 40.0 Sec. 300% 1.2 - 12.0 Sec. ent 700 450000%% 00..64 -- 52..08 SSeecc.. (12.91.52(cid:18))(.1678.95(cid:18)) .(370.73)(cid:18) c nt As A Peraker Rating650000 1068000000%%% 000..11.283 --- 001...789 SSSeeeccc... SEE TERFMORIN DALE TDARILAWINGS(cid:18) MOUSBNEUTESI NMHGOIN HUGAN ARTNDINDWG(cid:18)(cid:18)ARE(cid:18) d CurreOf Bre430000 .0(.381)(cid:18).(120.62)(cid:18) DRAWINGS FOR DETAIL a .575(cid:18) Lo 200 (14.6) 135 100 0 Optional Protective Boot .1 1 10 100 1000 10,000 Silicone rubber boot is bonded to integral alumimum nut. Time In Seconds Ambient Compensation Table 1-1423696-5 .63 DIA. Black boot for W57 with Ambient Rating Correction Factor (16.0) 3/8”-24 bushing. Temperature To use this chart: Divide the breaker in °C 3-4A Models 5-20A Models rating by the correction factor to .622 -10 .70 .77 determine the compensated rating. (15.8) 0 .75 .85 Calculate the overloads in terms of 10 .82 .90 the compensated rating to use the 20 .90 .95 published trip curve. 25 1.00 1.00 Do not use these devices outside 1-1423696-6 30 1.10 1.05 their specified operating temperature .7(107 D.8IA). Clear boot for W57 with 40 1.25 1.15 ranges. M11 X 1.0 bushing. 50 1.61 1.25 .799 60 2.15 1.40 (20.3) Revised 04-15 Dimensions are in inches over Dimensions are shown for reference USA: 1-800-522-6752 South America: 55-11-2103-6000 www.te.com (millimeters) unless otherwise purposes only. Specifications and Canada: 1-905-470-4425 Hong Kong: 852-2735-1628 1 specified. availability subject to change. Mexico: 01-800-733-8926 Japan: 81-44-844-8013 C. America: 52-55-1106-0803 UK: 44-8706-080208

Catalog 1308242 Issued 4-15 (PDF Rev. 04-15) Potter & Brumfield Ordering Information > W 57 -X B 1 A 4 A 1 0 -4 Typical Part No. 1. Designator: W = Circuit breaker 2. Series Number: 57 = Compact, Single Pole, Push-to-Reset, Thermal Model 3. Circuit Function: X = Series Trip 4. Button Color & Rate Marking: A = White, plain, no rate marking G = White, black rate marking (horizontal) B = White, red rate marking (vertical) H = Black, white rate marking (vertical) C = White, black rate marking (vertical) I = Red, plain, no rate marking D = Black, plain, no rate marking J = Black, no rate marking on button, E = Black, white rate marking (horizontal) white rate marking on bottom of F = White, red rate marking (horizontal) case between terminals. 5. Mounting Bushing: 1 = Plastic, 9.8mm (double D) X 9.6mm long, M11x1 threads, (similar to 7/16”), hex base 2 = Plastic, 3/8” (single D) x 10.5mm long, 3/8”x24 threads, hex base 4 = Plastic, snap-in type 5 = Metal, 9.8mm (double D) X 9.6mm long, M11x1 threads, (similar to 7/16”), round base 6 = Metal, 3/8” (single D) x 10.5mm long, 3/8”x24 threads, hex base 7 = Metal, 10.8mm (double D) x 9.6mm long, M12x1 threads, (similar to 15/32”), round base 8 = Metal, 3/8” (double D) x 10.0mm long, 3/8”x24 threads, hex base Notes: Codes 1 and 3 are similar in size to 7/16” bushings (not exact equivalent). Code 7 is similar in size to a 15/32” bushing (not exact equivalent) 6. Terminals: (see drawings for detail) A = Quick connect .250” (6.35mm) straight B = Quick connect .250” (6.35mm) , bent 90° C = Quick connect .250” (6.35mm) , bent 45° D = Quick connect .250” (6.35mm) , bent 90° E = Quick connect .250” (6.35mm) , bent 90°, PCB compatible F = Quick connect .250” (6.35mm) , bent 90°, PCB compatible G = Quick connect .250” (6.35mm) , straight (smaller hole) H = One quick connect .250” (6.35mm) , one #8-32 screw bent 90° I = Same as F above, but amperage marking reversed. 7. Mounting Hardware: 4 = Metal knurled nut/hex nut 7 = Plastic knurled nut 6 = Metal hex nut 8 = Plastic knurled nut with small hole 12 = Metal knurled nut 22 = Plastic knurled nut, metal lockwasher 15 = 2 metal hex nuts, metal lockwasher 18 = Metal hex nut, metal lockwasher 99 = None 8. Mounting Hardware Packaging: A = Assembled to bushing B = Bulk unassembled C = No mounting hardware. 9. Maximum Operating Voltage (AC): 1 = 250VAC 2 = 125VAC/50VDC 10. Nameplate: 0 = None 1 = Embossed aluminum 2 = Silver color printing on black color 3 = Black color printing on silver color 11. Specify Amp Rating: 3† 4† 5 6 7 8 10 12 15 20† †Not VDE 12. UL Recognition: Leave Blank = UL1077 recognized breaker M = Model meeting Ignition Protection requirements in accordance with UL1500, in addition to UL1077 recognition† †Not VDE Our authorized distributors are more likely to stock the following items for immediate delivery. W57-XB1A4A10-5 W57-XB1A4A10-15 W57-XB1A7A10-5 W57-XB1A7A10-15 W57-XB1A4A10-10 W57-XB1A4A10-20 W57-XB1A7A10-10 W57-XB1A7A10-20 ORDERING NOTE: Mounting hardware can be ordered separately. Some options are subject to extended leadtimes and significant minimum order quantities. Mounting Bushings and Recommended Panel Cutouts .338 .059 .4(1411.+2+.0.028, ,- .-0.0) .043 (8.6) .3(486.8 + +.0.20,8 -,. 0-.)0 .6(1360±±..1030)5 (1.5) (1.1) .386 .394+.008, -.0 .382 +.008, -.0 .543±.005 (9.8) (10.0+.2, -.0) (9.7 +.2, -.0) (13.8±.13) .378 .394 (9.6) (10.0) Option 1 – M11 X 1.0 Thread Option 2 & 6 – 3/8” - 24UNF Thread Option 4 – Snap In Option .441+.008, -.0 .480 +.008, -.0 .382 +.008, -.0 .059 (11.2+.2, -.0) .059 (12.2 +.2, -.0) .043 (9.7 +.2, -.0) (1.5) (1.5) (1.1) .386 .394+.008, -.0 .425 .433 +.008, -.0 .303 .311 +.008, -.0 (9.8) (10.0+.2, -.0) (10.8) (11.0 +.2, -.0) (7.7) (7.9 +.2, -.0) .378 .378 .394 (9.6) (9.6) (10.0) Option 5 – M11 X 1.0 Thread Option 7 – M12 X 1.0 Thread Option 8 – 3/8” - 24UNF Thread Revised 04-15 Dimensions are in inches over Dimensions are shown for reference USA: 1-800-522-6752 South America: 55-11-2103-6000 www.te.com (millimeters) unless otherwise purposes only. Specifications and Canada: 1-905-470-4425 Hong Kong: 852-2735-1628 2 specified. availability subject to change. Mexico: 01-800-733-8926 Japan: 81-44-844-8013 C. America: 52-55-1106-0803 UK: 44-8706-080208

Catalog 1308242 Issued 4-15 (PDF Rev. 04-15) Potter & Brumfield Termination Options .(132.26.()1 32.26) .(135.94.( 1 3±±5. 9 40. 0 .±±3.1(1 3) 0.2.0.2631) ). (132.26.()1 32.26) .(148..(1631.(5)1. 4948. 6 1±±) 0.0.31) .(.0(2139.2.5826.( 0 )2± ±9. 5 80. 0 .±±31.(1 )4 0.8.0.6131) ) .(148.61.()1 48..1611) 0.1 .((012290..588 ( ) 2± ±D. 8 0I.A)0. 3D1.) IA..(148.61) ..101701. 0 ((271.1.88 )() 1 DD.8IIAA) .D.IA. .071 (1.8) DIA. Option A Option C Option D Option E Option B Option F or I Option G Option H .250 QC .250 QC .250 QC .250 QC/PCB .250 QC .250 QC/PCB .250 QC Straight .250 QC Straight Straight 45° 90° 270° 90 ° 270 ° (small hole) with #8-32 Load Term. Bent 90° Mounting Hardware Options Optional Bottom Marking of Rating ALTERNATE TEETH TWISTEDALTERNATE TEETH TWISTED A A A AA A A IN OPAPOSITE DIRECTIONS IN OPPOSITE DIRECTIONS 2 X .059 DIA. 2 X .059 DIA. (1.5) (1.5) A A B B B BB 84B° 56° B 84° 5B6° B B Knurled Nut Hex Nut Integrated Knurled Nut Lockwasher with Small Holes Mounting Hardware Dimensions Dimension Bushing Plastic Integrated Plastic Metal Metal Lockwasher Code Diameter Knurled Nut Knurled Nut w/Holes Knurled Nut Hex Nut 3/8” .74 (18.8) – .56 (14.2) .55 (14.0) .49 (12.5) A 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) 3/8” .126 (3.2) – .079 (2.0) .079 (2.0) .02 (.5) B 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 Mounting Bushing Mounting Bushing Plastic Integrated Plastic Metal Metal Lockwasher Material Code Knurled Nut Knurled Nut w/Holes Knurled Nut Hex Nut Plastic 1 (M11) – 1423696-8 2-1423696-2 – – 2 (3/8”) – 1423696-2 – – – 5 (M11) – – 1423696-4 1423696-6 1-1423696-2 Metal 6 (3/8”) – – 1-1423696-0 1423696-3 1-1423696-1 7 (M12) – – 1423696-5 1423696-7 1-1423696-3 8 (3/8”) – – 1-1423696-0 1423696-3 1-1423696-1 Nameplates .854 DIA.(cid:23) .945 DIA.(cid:23) (21.7) (24.0) .016 (.4) THICK .016 (.4) THICK Embossed Imprinted Aluminum Aluminum (Either Silver on Black or Black on Silver) Revised 04-15 Dimensions are in inches over Dimensions are shown for reference USA: 1-800-522-6752 South America: 55-11-2103-6000 www.te.com (millimeters) unless otherwise purposes only. Specifications and Canada: 1-905-470-4425 Hong Kong: 852-2735-1628 3 specified. availability subject to change. Mexico: 01-800-733-8926 Japan: 81-44-844-8013 C. America: 52-55-1106-0803 UK: 44-8706-080208