Circuit Breakers – Mouser Canada

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UR Circuit Breakers

Altech UR Circuit Breakers are UL 1077-recognized supplementary protectors with B-, C-, and D-trip curves. These DIN-rail-mounted modules are available in 1-, 2-, and 3-pole variants as well as an add-on neutral pole option. Altech UR Circuit Breakers feature a 17.5mm width per pole and 10kA short circuit withstand capacity. Typical applications include sensitive electronics, power supplies, and appliance circuits.

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Part #

Circuit Breakers 20A,MCB B CHAR 3PL 480Y/277VAC, UL1077

3B20UR
Altech
1: $117.44
3In Stock

Mfr. Part #
3B20UR

Mouser Part #
845-3B20UR

Altech

Circuit Breakers 20A,MCB B CHAR 3PL 480Y/277VAC, UL1077

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Datasheet

3In Stock

$117.44

$97.43

$90.61

$75.50

View

Min.: 1
Mult.: 1

Circuit Breaker

B-Trip

20 A

277 VAC

3 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

Circuit Breakers 6A,MCB D CHAR 1 PL, 277VAC, UL1077

1D6UR
Altech
1: $39.46
2In Stock

Mfr. Part #
1D6UR

Mouser Part #
845-1D6UR

Altech

Circuit Breakers 6A,MCB D CHAR 1 PL, 277VAC, UL1077

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Datasheet

2In Stock

$39.46

$27.67

$25.75

$24.66

View

Min.: 1
Mult.: 1

6 A

277 VAC

1 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

Circuit Breakers 5A,MCB D CHAR 2PL 480Y/277VAC, UL1077

2D5UR
Altech
1: $81.56
7In Stock

Mfr. Part #
2D5UR

Mouser Part #
845-2D5UR

Altech

Circuit Breakers 5A,MCB D CHAR 2PL 480Y/277VAC, UL1077

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Datasheet

7In Stock

$81.56

$67.66

$62.42

$53.69

View

Min.: 1
Mult.: 1

Circuit Breaker

D-Trip

5 A

277 VAC

2 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

Circuit Breakers 0.5A, MCB B CHAR 1 PL, 277VAC, UL1077

1B05UR
Altech
1: $43.34
6In Stock

Mfr. Part #
1B05UR

Mouser Part #
845-1B05UR

Altech

Circuit Breakers 0.5A, MCB B CHAR 1 PL, 277VAC, UL1077

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Datasheet

6In Stock

$43.34

$35.96

$33.17

$27.48

View

Min.: 1
Mult.: 1

Circuit Breaker

B-Trip

500 mA

277 VAC

1 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

Circuit Breakers 1A,MCB B CHAR 2PL 480Y/277VAC, UL1077

2B1UR
Altech
1: $81.56
22In Stock

Mfr. Part #
2B1UR

Mouser Part #
845-2B1UR

Altech

Circuit Breakers 1A,MCB B CHAR 2PL 480Y/277VAC, UL1077

Learn More

Datasheet

22In Stock

$81.56

$67.66

$62.42

$53.69

View

Min.: 1
Mult.: 1

1 A

277 VAC

2 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

Circuit Breakers 10A,MCB D CHAR 2PL 480Y/277VAC, UL1077

2D10UR
Altech
1: $81.56
11In Stock

Mfr. Part #
2D10UR

Mouser Part #
845-2D10UR

Altech

Circuit Breakers 10A,MCB D CHAR 2PL 480Y/277VAC, UL1077

Learn More

Datasheet

11In Stock

$81.56

$67.66

$62.42

$53.69

View

Min.: 1
Mult.: 1

Circuit Breaker

D-Trip

10 A

277 VAC

2 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

Circuit Breakers 20A,MCB D CHAR 2PL 480Y/277VAC, UL1077

2D20UR
Altech
1: $54.58
28In Stock
5Expected 2026-02-13

Mfr. Part #
2D20UR

Mouser Part #
845-2D20UR

Altech

Circuit Breakers 20A,MCB D CHAR 2PL 480Y/277VAC, UL1077

Learn More

Datasheet

28In Stock

5Expected 2026-02-13

$54.58

$52.87

$51.97

$50.27

View

Min.: 1
Mult.: 1

Circuit Breaker

D-Trip

20 A

277 VAC

2 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

Circuit Breakers 6A,MCB B CHAR 1 PL, 277VAC, UL1077

1B6UR
Altech
1: $27.67
1On Order

Mfr. Part #
1B6UR

Mouser Part #
845-1B6UR

Altech

Circuit Breakers 6A,MCB B CHAR 1 PL, 277VAC, UL1077

Learn More

Datasheet

1On Order

$27.67

$26.30

$25.11

$24.24

View

Min.: 1
Mult.: 1

6 A

277 VAC

1 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

Circuit Breakers 20A,MCB C CHAR 2PL 480Y/277VAC, UL1077

2C20UR
Altech
1: $55.34
15Expected 2026-03-06

Mfr. Part #
2C20UR

Mouser Part #
845-2C20UR

Altech

Circuit Breakers 20A,MCB C CHAR 2PL 480Y/277VAC, UL1077

Learn More

Datasheet

15Expected 2026-03-06

$55.34

$55.32

$51.37

$49.91

View

Min.: 1
Mult.: 1

Circuit Breaker

C-Trip

20 A

277 VAC

2 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

Circuit Breakers 0.5A,MCB D CHAR 2PL 480Y/277VAC, UL1077

2D05UR
Altech
1: $81.56
5Expected 2026-03-10

Mfr. Part #
2D05UR

Mouser Part #
845-2D05UR

Altech

Circuit Breakers 0.5A,MCB D CHAR 2PL 480Y/277VAC, UL1077

Learn More

Datasheet

5Expected 2026-03-10

$81.56

$67.66

$62.42

$53.69

View

Min.: 1
Mult.: 1

500 mA

277 VAC

2 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

Circuit Breakers 5A,MCB B CHAR 1 PL, 277VAC, UL1077

1B5UR
Altech
1: $43.34
4Factory Stock Available

Mfr. Part #
1B5UR

Mouser Part #
845-1B5UR

Altech

Circuit Breakers 5A,MCB B CHAR 1 PL, 277VAC, UL1077

Learn More

Datasheet

4Factory Stock Available

More Info Available

$43.34

$35.96

$33.17

$27.48

View

Min.: 1
Mult.: 1

5 A

277 VAC

1 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

Circuit Breakers 3A,MCB C CHAR 1 PL, 277VAC, UL1077

1C3UR
Altech
1: $27.67
45Factory Stock Available

Mfr. Part #
1C3UR

Mouser Part #
845-1C3UR

Altech

Circuit Breakers 3A,MCB C CHAR 1 PL, 277VAC, UL1077

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Datasheet

45Factory Stock Available

More Info Available

$27.67

$26.49

$25.25

$24.35

View

Min.: 1
Mult.: 1

3 A

277 VAC

1 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

Circuit Breakers 2A,MCB D CHAR 1 PL, 277VAC, UL1077

1D2UR
Altech
1: $27.67
52Factory Stock Available

Mfr. Part #
1D2UR

Mouser Part #
845-1D2UR

Altech

Circuit Breakers 2A,MCB D CHAR 1 PL, 277VAC, UL1077

Learn More

Datasheet

52Factory Stock Available

More Info Available

$27.67

$27.65

$25.75

$24.66

View

Min.: 1
Mult.: 1

2 A

277 VAC

1 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

Circuit Breakers 10A,MCB B CHAR 2PL 480Y/277VAC, UL1077

2B10UR
Altech
1: $81.56
6Factory Stock Available

Mfr. Part #
2B10UR

Mouser Part #
845-2B10UR

Altech

Circuit Breakers 10A,MCB B CHAR 2PL 480Y/277VAC, UL1077

Learn More

Datasheet

6Factory Stock Available

More Info Available

$81.56

$67.66

$62.42

$53.69

View

Min.: 1
Mult.: 1

10 A

277 VAC

2 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

Circuit Breakers 6A,MCB D CHAR 2PL 480Y/277VAC, UL1077

2D6UR
Altech
1: $55.34
18Factory Stock Available

Mfr. Part #
2D6UR

Mouser Part #
845-2D6UR

Altech

Circuit Breakers 6A,MCB D CHAR 2PL 480Y/277VAC, UL1077

Learn More

Datasheet

18Factory Stock Available

More Info Available

$55.34

$55.04

$54.13

$53.17

Quote

Min.: 1
Mult.: 1

6 A

277 VAC

2 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

Circuit Breakers 16A,MCB D CHAR 3PL 480Y/277VAC, UL1077

3D16UR
Altech
1: $117.44
21Factory Stock Available

Mfr. Part #
3D16UR

Mouser Part #
845-3D16UR

Altech

Circuit Breakers 16A,MCB D CHAR 3PL 480Y/277VAC, UL1077

Learn More

Datasheet

21Factory Stock Available

More Info Available

$117.44

$97.43

$90.61

$75.50

View

Min.: 1
Mult.: 1

16 A

277 VAC

3 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

Circuit Breakers 63A,MCB D CHAR 3PL 480Y/277VAC, UL1077

3D63UR
Altech
1: $124.53
1Factory Stock Available

Mfr. Part #
3D63UR

Mouser Part #
845-3D63UR

Altech

Circuit Breakers 63A,MCB D CHAR 3PL 480Y/277VAC, UL1077

Learn More

Datasheet

1Factory Stock Available

More Info Available

$124.53

$103.31

$96.07

$80.06

View

Min.: 1
Mult.: 1

Circuit Breakers 1 POLE, 277VAC UL1077

1B10UR
Altech
1: $43.34
203Factory Stock Available

Mfr. Part #
1B10UR

Mouser Part #
845-1B10UR

Altech

Circuit Breakers 1 POLE, 277VAC UL1077

Learn More

Datasheet

203Factory Stock Available

More Info Available

$43.34

$35.96

$33.17

$27.48

View

Min.: 1
Mult.: 1

10 A

277 VAC

1 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

Circuit Breakers 12A,MCB B CHAR 1 PL, 277VAC, UL1077

1B12UR
Altech
1: $43.34
35Factory Stock Available

Mfr. Part #
1B12UR

Mouser Part #
845-1B12UR

Altech

Circuit Breakers 12A,MCB B CHAR 1 PL, 277VAC, UL1077

Learn More

Datasheet

35Factory Stock Available

More Info Available

$43.34

$35.96

$33.17

$27.48

View

Min.: 1
Mult.: 1

12 A

277 VAC

1 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

Circuit Breakers 13A,MCB B CHAR 1 PL, 277VAC, UL1077

1B13UR
Altech
1: $43.34
15Factory Stock Available

Mfr. Part #
1B13UR

Mouser Part #
845-1B13UR

Altech

Circuit Breakers 13A,MCB B CHAR 1 PL, 277VAC, UL1077

Learn More

Datasheet

15Factory Stock Available

More Info Available

$43.34

$35.96

$33.17

$27.48

View

Min.: 1
Mult.: 1

13 A

277 VAC

1 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

Circuit Breakers 15A,MCB B CHAR 1 PL, 277VAC, UL1077

1B15UR
Altech
1: $43.34
58Factory Stock Available

Mfr. Part #
1B15UR

Mouser Part #
845-1B15UR

Altech

Circuit Breakers 15A,MCB B CHAR 1 PL, 277VAC, UL1077

Learn More

Datasheet

58Factory Stock Available

More Info Available

$43.34

$35.96

$33.17

$27.48

View

Min.: 1
Mult.: 1

Circuit Breaker

B-Trip

15 A

277 VAC

1 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

Circuit Breakers 16A,MCB B CHAR 1 PL, 277VAC, UL1077

1B16UR
Altech
1: $43.34
1Factory Stock Available

Mfr. Part #
1B16UR

Mouser Part #
845-1B16UR

Altech

Circuit Breakers 16A,MCB B CHAR 1 PL, 277VAC, UL1077

Learn More

Datasheet

1Factory Stock Available

More Info Available

$43.34

$35.96

$33.17

$27.48

View

Min.: 1
Mult.: 1

16 A

277 VAC

1 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

Circuit Breakers 1A,MCB B CHAR 1 PL, 277VAC, UL1077

1B1UR
Altech
1: $43.34
33Factory Stock Available

Mfr. Part #
1B1UR

Mouser Part #
845-1B1UR

Altech

Circuit Breakers 1A,MCB B CHAR 1 PL, 277VAC, UL1077

Learn More

Datasheet

33Factory Stock Available

More Info Available

$43.34

$35.96

$33.17

$27.48

View

Min.: 1
Mult.: 1

1 A

277 VAC

1 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

Circuit Breakers 20A,MCB B CHAR 1 PL, 277VAC, UL1077

1B20UR
Altech
1: $43.34
8Factory Stock Available

Mfr. Part #
1B20UR

Mouser Part #
845-1B20UR

Altech

Circuit Breakers 20A,MCB B CHAR 1 PL, 277VAC, UL1077

Learn More

Datasheet

8Factory Stock Available

More Info Available

$43.34

$35.96

$33.17

$27.48

View

Min.: 1
Mult.: 1

20 A

277 VAC

1 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

Circuit Breakers 25A,MCB B CHAR 1 PL, 277VAC, UL1077

1B25UR
Altech
1: $43.34
67Factory Stock Available

Mfr. Part #
1B25UR

Mouser Part #
845-1B25UR

Altech

Circuit Breakers 25A,MCB B CHAR 1 PL, 277VAC, UL1077

Learn More

Datasheet

67Factory Stock Available

More Info Available

$43.34

$35.96

$33.17

$27.48

View

Min.: 1
Mult.: 1

25 A

277 VAC

1 Pole

Handle

- 25 C

+ 55 C

Non-Illuminated

UR Circuit Breakers

Mouser Electronics®

Company

Resources

Support

500 mA
1 A
2 A
3 A
4 A
5 A
6 A
8 A
10 A
12 A
13 A
15 A
16 A
20 A
25 A
30 A
32 A
40 A
50 A
60 A