CA1-B2-42-450-121-D Littelfuse CA1-B2-42-450-121-D is a 5A, 250V, 1-pole magnetic (hydraulic delay) circuit breaker with panel mount and lever actuator. It is approved by CCC, CSA, UL, and VDE.
Mfr Part #:

CA1-B2-42-450-121-D

Mfr Name: Littelfuse Inc.
Littelfuse Inc.
Littelfuse CA1-B2-42-450-121-D is a 5A, 250V, 1-pole magnetic (hydraulic delay) circuit breaker with panel mount and lever actuator. It is approved by CCC, CSA, UL, and VDE.
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CA1-B2-42-450-121-D Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Actuator Type
Approval Agency
Breaker Type
Current Rating
Current Rating (Amps)
Illumination
Mounting Type
Number of Poles
Voltage Rating

CA1-B2-42-450-121-D Description

Short technical summary and product information.

The Littelfuse CA1-B2-42-450-121-D is a single-pole magnetic circuit breaker with hydraulic delay, rated for 5A continuous current and 250V AC/DC. It features a lever actuator and is designed for panel mount installation. The hydraulic delay mechanism provides time-delayed overcurrent protection, suitable for handling transient inrush currents without nuisance tripping.

 

This circuit breaker is qualified under multiple safety standards including CCC, CSA, UL, and VDE, making it suitable for use in a wide range of industrial and commercial equipment. It has a non-illuminated lever actuator, allowing manual reset after a trip event.

 

The panel mount design enables straightforward installation into control panels, distribution boxes, or equipment enclosures. As a single-pole device, it is intended for single-phase applications or individual branch circuit protection. The hydraulic delay ensures stable operation under varying ambient temperatures.

CA1-B2-42-450-121-D Quick Information

Product Type: Circuit Breaker
Canonical Name: Littelfuse CA1-B2-42-450-121-D 5A, 250V, 1-Pole Magnetic (Hydraulic Delay) Circuit Breaker, Panel Mount, Lever Actuator
Subcategory: Magnetic (Hydraulic Delay) Circuit Breaker

CA1-B2-42-450-121-D Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

CA1-B2-42-450-121-D Features

  • Rated 5A at 250V AC/DC.
  • Single-pole magnetic circuit breaker with hydraulic delay.
  • Panel mount with lever actuator.
  • Approved by CCC, CSA, UL, and VDE.
  • Non-illuminated actuator.

CA1-B2-42-450-121-D Applications

  • Ideal for overcurrent protection in industrial control panels.
  • Used in power distribution units and equipment.
  • Suitable for single-phase branch circuit protection.
  • Can be applied in commercial and light industrial machinery.

CA1-B2-42-450-121-D FAQs

7 frequently asked questions generated from this part’s specifications.
What is the current rating of the CA1-B2-42-450-121-D?

5A.

What is the voltage rating of the CA1-B2-42-450-121-D?

250V.

What type of circuit breaker is the CA1-B2-42-450-121-D?

Magnetic (Hydraulic Delay).

How many poles does the CA1-B2-42-450-121-D have?

1 pole.

What is the mounting type of the CA1-B2-42-450-121-D?

Panel Mount.

What actuator type does the CA1-B2-42-450-121-D have?

Lever.

What approvals does the CA1-B2-42-450-121-D have?

CCC, CSA, UL, VDE.

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