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Miniature Circuit Breakers

Shop our wide selection of UL 489 miniature circuit breakers and UL 1077 supplementary protectors in both AC and DC voltages. They are available in one-, two- and three-pole versions with an amperage range up to 63A and in B, C or D trip curve options to meet your applications needs. Difference between UL 489 vs. UL 1077

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Altech Corp 1D4UR Miniature Circuit Breaker
4A Miniature Circuit Breaker, 1 Pole, D-Curve (Rated to 277 VAC) | 1D4UR
Retail: $20.61
Price: $12.95

The Altech Corp 1D4UR is suitable for branch circuit device protection applications with Low inrush motors, resistive loads, wiring protection, receptacles, lighting, and control circuit applications.

  • Terminal Type: Box Clamp or Ring Tongue
  • Amperage: 4
  • Pole: 1
  • Trip Curve: D
  • UL 1077 Listed, UL, CE
MFG Part# 1D4UR
Noark B1H1D4 Mini Circuit Breaker
4A Miniature Circuit Breaker, 1 Pole, D-Curve (Rated to 480Y/277 VAC) | B1H1D4
Retail: $27.92
Price: $25.55

The Noark B1H1D4 is suitable for branch circuit device protection.

  • Terminal Type: Box Lugs
  • Amperage: 4
  • Pole: 1
  • Trip Curve: D
  • UL 489 Listed, CSA C22.2 No. 5, IEC/EN 60947-2, CE, RoHS
MFG Part# B1H1D4
Altech Corp 1B4UM Miniature Circuit Breaker
4A Miniature Circuit Breaker, 1 Poles, B-Curve (Rated to 40Y/277 VAC) | 1B4UM
Retail: $27.48
Price: $17.26

The Altech Corp 1B4UM is suitable for branch circuit device protection applications with Low inrush motors, resistive loads, wiring protection, receptacles, lighting, and control circuit applications.

  • Terminal Type: Box Clamp or Ring Tongue
  • Amperage: 4
  • Poles: 1
  • Trip Curve: B
  • UL 508 Listed, UL, cUL, CSA
MFG Part# 1B4UM
Altech Corp 1C4UM Miniature Circuit Breaker
4A Miniature Circuit Breaker, 1 Poles, C-Curve (Rated to 40Y/277 VAC) | 1C4UM
Retail: $27.48
Price: $17.26

The Altech Corp 1C4UM is suitable for branch circuit device protection applications with Low inrush motors, resistive loads, wiring protection, receptacles, lighting, and control circuit applications.

  • Terminal Type: Box Clamp or Ring Tongue
  • Amperage: 4
  • Poles: 1
  • Trip Curve: C
  • UL 508 Listed, UL, cUL, CSA
MFG Part# 1C4UM
Altech Corp 1D4UM Miniature Circuit Breaker
4A Miniature Circuit Breaker, 1 Poles, D-Curve (Rated to 40Y/277 VAC) | 1D4UM
Retail: $27.48
Price: $17.26

The Altech Corp 1D4UM is suitable for branch circuit device protection applications with Low inrush motors, resistive loads, wiring protection, receptacles, lighting, and control circuit applications.

  • Terminal Type: Box Clamp or Ring Tongue
  • Amperage: 4
  • Poles: 1
  • Trip Curve: D
  • UL 508 Listed, UL, cUL, CSA
MFG Part# 1D4UM
Noark B1N2B4 Mini Circuit Breaker
4A Miniature Circuit Breaker, 2 Pole, B-Curve (Rated to 240 VAC, 125VDC) | B1N2B4
Retail: $44.83
Price: $41.02

The Noark B1N2B4 is suitable for branch circuit device protection.

  • Terminal Type: Box Lugs
  • Amperage: 4
  • Poles: 2
  • Trip Curve: B
  • UL 489 Listed, CSA C22.2 No. 5, IEC/EN 60947-2, CE, RoHS
MFG Part# B1N2B4
Noark B1H2B4 Mini Circuit Breaker
4A Miniature Circuit Breaker, 2 Pole, B-Curve (Rated to 480Y/277 VAC) | B1H2B4
Retail: $51.92
Price: $47.51

The Noark B1H2B4 is suitable for branch circuit device protection.

  • Terminal Type: Box Lugs
  • Amperage: 4
  • Poles: 2
  • Trip Curve: B
  • UL 489 Listed, CSA C22.2 No. 5, IEC/EN 60947-2, CE, RoHS
MFG Part# B1H2B4
Noark B1N2C4 Mini Circuit Breaker
4A Miniature Circuit Breaker, 2 Pole, C-Curve (Rated to 240 VAC, 125VDC) | B1N2C4
Retail: $43.38
Price: $39.70

The Noark B1N2C4 is suitable for branch circuit device protection.

  • Terminal Type: Box Lugs
  • Amperage: 4
  • Poles: 2
  • Trip Curve: C
  • UL 489 Listed, CSA C22.2 No. 5, IEC/EN 60947-2, CE, RoHS
MFG Part# B1N2C4
Noark B1H2C4 Mini Circuit Breaker
4A Miniature Circuit Breaker, 2 Pole, C-Curve (Rated to 480Y/277 VAC) | B1H2C4
Retail: $53.25
Price: $48.73

The Noark B1H2C4 is suitable for branch circuit device protection.

  • Terminal Type: Box Lugs
  • Amperage: 4
  • Poles: 2
  • Trip Curve: C
  • UL 489 Listed, CSA C22.2 No. 5, IEC/EN 60947-2, CE, RoHS
MFG Part# B1H2C4
Noark B1N2D4 Mini Circuit Breaker
4A Miniature Circuit Breaker, 2 Pole, D-Curve (Rated to 240 VAC, 125VDC) | B1N2D4
Retail: $43.38
Price: $39.70

The Noark B1N2D4 is suitable for branch circuit device protection.

  • Terminal Type: Box Lugs
  • Amperage: 4
  • Poles: 2
  • Trip Curve: D
  • UL 489 Listed, CSA C22.2 No. 5, IEC/EN 60947-2, CE, RoHS
MFG Part# B1N2D4
Noark B1H2D4 Mini Circuit Breaker
4A Miniature Circuit Breaker, 2 Pole, D-Curve (Rated to 480Y/277 VAC) | B1H2D4
Retail: $51.92
Price: $47.51

The Noark B1H2D4 is suitable for branch circuit device protection.

  • Terminal Type: Box Lugs
  • Amperage: 4
  • Poles: 2
  • Trip Curve: D
  • UL 489 Listed, CSA C22.2 No. 5, IEC/EN 60947-2, CE, RoHS
MFG Part# B1H2D4
Altech Corp 2B4UM Miniature Circuit Breaker
4A Miniature Circuit Breaker, 2 Poles, B-Curve (Rated to 40Y/277 VAC) | 2B4UM
Retail: $54.98
Price: $34.54

The Altech Corp 2B4UM is suitable for branch circuit device protection applications with Low inrush motors, resistive loads, wiring protection, receptacles, lighting, and control circuit applications.

  • Terminal Type: Box Clamp or Ring Tongue
  • Amperage: 4
  • Poles: 2
  • Trip Curve: B
  • UL 508 Listed, UL, cUL, CSA
MFG Part# 2B4UM
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