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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

Products 1057-1068 of 1377
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Noark B1N1D50 Mini Circuit Breaker
Retail: $18.20
Price: $15.47

The Noark B1N1D50 is suitable for branch circuit device protection.

  • Terminal Type: Box Lugs
  • Amperage: 50
  • Pole: 1
  • Trip Curve: D
  • UL 489 Listed, CSA C22.2 No. 5, IEC/EN 60947-2, CE, RoHS
MFG Part# B1N1D50
Altech 1D50UR Miniature Circuit Breaker
Retail: $18.38
Price: $11.55

The Altech 1D50UR is suitable for applications that require supplemental protection for control circuits and on the load side of branch circuit protectors.

  • Terminal Type: Box Lug or Ring Tongue
  • Amperage: 50
  • Pole: 1
  • Trip Curve: D
  • UL 1077 Listed
MFG Part# 1D50UR
Altech 1DU50R Miniature Circuit Breaker
Retail: $17.32
Price: $10.88

The Altech 1DU50R is suitable for applications that require supplemental protection for control circuits and on the load side of branch circuit protectors.

  • Terminal Type: Box Lugs
  • Amperage: 50
  • Pole: 1
  • Trip Curve: D
  • UL 1077 Listed, IEC/EN60898/60947-2
MFG Part# 1DU50R
Noark B1N2B50 Mini Circuit Breaker
Retail: $35.90
Price: $30.52

The Noark B1N2B50 is suitable for branch circuit device protection.

  • Terminal Type: Box Lugs
  • Amperage: 50
  • Poles: 2
  • Trip Curve: B
  • UL 489 Listed, CSA C22.2 No. 5, IEC/EN 60947-2, CE, RoHS
MFG Part# B1N2B50
Altech 2B50UR Miniature Circuit Breaker
Retail: $36.74
Price: $23.07

The Altech 2B50UR is suitable for applications that require supplemental protection for control circuits and on the load side of branch circuit protectors.

  • Terminal Type: Box Lugs
  • Amperage: 50
  • Poles: 2
  • Trip Curve: B
  • UL 1077 Listed, IEC/EN60898/60947-2
MFG Part# 2B50UR
Altech 2BU50R Miniature Circuit Breaker
Retail: $34.66
Price: $21.77

The Altech 2BU50R is suitable for applications that require supplemental protection for control circuits and on the load side of branch circuit protectors.

  • Terminal Type: Box Lugs
  • Amperage: 50
  • Poles: 2
  • Trip Curve: B
  • UL 1077 Listed, IEC/EN60898/60947-2
MFG Part# 2BU50R
Altech 2CU50L Miniature Circuit Breaker
Retail: $64.69
Price: $40.64

The Altech 2CU50L is suitable for branch circuit device protection.

  • Terminal Type: Box Lugs
  • Amperage: 50
  • Poles: 2
  • Trip Curve: C
  • UL 489 Listed, C22.2 No.5-02, EN 60947-2, CE
MFG Part# 2CU50L
Noark B1N2C50 Mini Circuit Breaker
Retail: $34.80
Price: $29.58

The Noark B1N2C50 is suitable for branch circuit device protection.

  • Terminal Type: Box Lugs
  • Amperage: 50
  • Poles: 2
  • Trip Curve: C
  • UL 489 Listed, CSA C22.2 No. 5, IEC/EN 60947-2, CE, RoHS
MFG Part# B1N2C50
Altech DC2CU50L Miniature Circuit Breaker
Retail: $69.30
Price: $43.54

The Altech DC2CU50L is suitable for branch circuit device protection.

  • Terminal Type: Box Lugs
  • Amperage: 50
  • Poles: 2
  • Trip Curve: C
  • UL 489 Listed, C22.2 No.5-02, EN 60947-2, CE
MFG Part# DC2CU50L
Altech 2CU50R Miniature Circuit Breaker
Retail: $34.66
Price: $21.77

The Altech 2CU50R is suitable for applications that require supplemental protection for control circuits and on the load side of branch circuit protectors.

  • Terminal Type: Box Lugs
  • Amperage: 50
  • Poles: 2
  • Trip Curve: C
  • UL 1077 Listed, IEC/EN60898/60947-2
MFG Part# 2CU50R
Altech 2DU50L Miniature Circuit Breaker
Retail: $64.69
Price: $40.64

The Altech 2DU50L is suitable for branch circuit device protection.

  • Terminal Type: Box Lugs
  • Amperage: 50
  • Poles: 2
  • Trip Curve: D
  • UL 489 Listed, C22.2 No.5-02, EN 60947-2, CE
MFG Part# 2DU50L
Noark B1N2D50 Mini Circuit Breaker
Retail: $34.80
Price: $29.58

The Noark B1N2D50 is suitable for branch circuit device protection.

  • Terminal Type: Box Lugs
  • Amperage: 50
  • Poles: 2
  • Trip Curve: D
  • UL 489 Listed, CSA C22.2 No. 5, IEC/EN 60947-2, CE, RoHS
MFG Part# B1N2D50