2

Catalog 1308242

Issued 4-15 (PDF Rev. 04-15)

Revised 04-15

www.te.com

Dimensionsareininchesover

(millimeters)unlessotherwise

specified.

Dimensionsareshownforreference

purposes only. Specifications and

availability subject to change.

SouthAmerica:55-11-2103-6000

Hong Kong: 852-2735-1628

Japan: 81-44-844-8013

UK: 44-8706-080208

USA: 1-800-522-6752

Canada: 1-905-470-4425

Mexico: 01-800-733-8926

C. America: 52-55-1106-0803

Potter & Brumfield

Mounting Bushings and Recommended Panel Cutouts

.303

(7.7)

.425

(10.8)

.378

(9.6)

.394

(10.0)

.059

(1.5)

.043

(1.1)

.394

(10.0)

.043

(1.1)

.338

(8.6)

.378

(9.6)

.059

(1.5)

.386

(9.8)

.378

(9.6)

.059

(1.5)

.386

(9.8)

.543±.005

(13.8±.13)

.630±.005

(16±.13)

.394+.008, -.0

(10.0+.2, -.0)

.441+.008, -.0

(11.2+.2, -.0)

.394+.008, -.0

(10.0+.2, -.0)

.441+.008, -.0

(11.2+.2, -.0)

.382 +.008, -.0

(9.7 +.2, -.0)

.346 +.008, -.0

(8.8 +.2, -.0)

.311 +.008, -.0

(7.9 +.2, -.0)

.382 +.008, -.0

(9.7 +.2, -.0)

.433 +.008, -.0

(11.0 +.2, -.0)

.480 +.008, -.0

(12.2 +.2, -.0)

Option 5 – M11 X 1.0 Thread

Option 2 & 6 – 3/8” - 24UNF Thread

Option 4 – Snap In Option

Ordering Information

Option 8 – 3/8” - 24UNF Thread

Typical Part No.

>

W

57

-X

B

1

A

4

A

1

0

-4

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.

Option 1 – M11 X 1.0 Thread

Option 7 – M12 X 1.0 Thread

ORDERING NOTE:

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

W57-XB1A4A10-5

W57-XB1A4A10-10

W57-XB1A4A10-15

W57-XB1A4A10-20

W57-XB1A7A10-5

W57-XB1A7A10-10

W57-XB1A7A10-15

W57-XB1A7A10-20