A02504 Configurable Contact Block DPST-NC 16A 250VAC

Part Overview

The A02504 is a configurable contact block manufactured by APEM Inc., designed for use with compatible switch bodies in the A02 series. This component provides DPST-NC (Double Pole Single Throw - Normally Closed) switching functionality rated at 16A @ 250VAC. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations where this contact block configuration is required.

Substiute Parts

A02504

APEM Inc.In Stock: 1029A02504 Datasheet

Current PartRFQ

LB-T60

IDECIn Stock: 1033LB-T60 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution analysis for the A02504 is based on the following critical parameters: circuit configuration, contact current rating, contact voltage rating, termination style, and regulatory compliance status.

The identified substitute part LB-T60 (IDEC) differs in the following aspects:

• Circuit Configuration: LB-T60 provides DPDT (Double Pole Double Throw) versus the A02504's DPST-NC configuration
• Contact Rating: LB-T60 is rated at 5A @ 125VAC/30VDC, which is lower than the A02504's 16A @ 250VAC rating
• Termination Style: LB-T60 uses Solder and Quick Connect (0.110" / 2.8mm) terminals, differing from the A02504's Screw Terminal design

Due to these parameter differences, the LB-T60 cannot be considered a direct functional equivalent for applications requiring the specific DPST-NC configuration and 16A @ 250VAC rating of the A02504.

Parameter Comparison

Engineering Selection Recommendations

Selection of alternative contact blocks for A02504 applications must account for the specific electrical requirements and mechanical constraints of the original design. Both the A02504 and LB-T60 maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for new implementations.

The LB-T60, while currently in active production status, presents significant parameter deviations that preclude its use as a direct substitute in applications designed for the A02504's DPST-NC configuration and 16A @ 250VAC rating. Alternative contact blocks from APEM's A02 series or equivalent DPST-NC rated contact blocks from other manufacturers should be evaluated for applications requiring the original A02504 specifications.

Frequently Asked Questions (FAQ)

Q: Can the LB-T60 replace the A02504 in existing applications?

A: No. The LB-T60 differs in circuit configuration (DPDT vs. DPST-NC), contact rating (5A @ 125VAC/30VDC vs. 16A @ 250VAC), and termination style (Solder/Quick Connect vs. Screw Terminal). These differences make it unsuitable for direct substitution.

Q: What makes a contact block a valid substitute for the A02504?

A: A valid substitute must maintain the same circuit configuration (DPST-NC), contact rating (16A @ 250VAC), and compatible termination style (Screw Terminal) for use with A02 series switch bodies.

Q: Why is the A02504 listed as obsolete?

A: The A02504 is classified as obsolete by the manufacturer, indicating it is no longer in active production. Existing inventory remains available, but long-term availability cannot be assured.

Q: Are there regulatory compliance concerns with using the LB-T60 as an alternative?

A: Both parts maintain ROHS3 compliance and REACH unaffected status. However, regulatory compliance alone does not address the functional and electrical parameter mismatches between these components.

Q: What should be done if the A02504 is no longer available?

A: Contact block selection should prioritize APEM A02 series alternatives or equivalent DPST-NC contact blocks from other manufacturers that match the 16A @ 250VAC rating and Screw Terminal termination requirements.