ALE74B24 General Purpose Relay - Equivalent & Substitute Parts

Part Overview

The ALE74B24 is a general purpose relay manufactured by Panasonic Electric Works, configured as a SPST-NO (1 Form A) with a 24VDC coil and 16A contact rating. This through-hole mounted relay is designed for switching applications up to 277VAC maximum. The product is currently obsolete, making equivalent substitute parts necessary for ongoing maintenance, repair, and new design implementations where this relay specification remains applicable.

Substiute Parts

ALE74B24

Panasonic Electric WorksIn Stock: 831ALE74B24 Datasheet

Current PartRFQ

PCK-124D2M,000

TE Connectivity Potter & Brumfield RelaysIn Stock: 914PCK-124D2M,000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ALE74B24 is determined by strict equivalence across the following critical parameters:

• Coil voltage: 24VDC (exact match required)
• Contact configuration: SPST-NO (1 Form A) (exact match required)
• Contact current rating: 16 A (exact match required)
• Maximum switching voltage: 277VAC or higher (equal or greater acceptable)
• Mounting type: Through hole (exact match required)
• Termination style: PC Pin, Quick Connect - 0.187" (4.7mm) (exact match required)
• Contact material: Silver Tin Oxide (AgSnO) (exact match required)

The PCK-124D2M,000 from TE Connectivity Potter & Brumfield Relays meets all critical substitution criteria and is classified as an active product with current manufacturing support.

Parameter Comparison

Engineering Selection Recommendations

The PCK-124D2M,000 is the qualified substitute for the obsolete ALE74B24. Both relays share identical electrical specifications for coil voltage, contact configuration, current rating, and switching voltage. The substitute part is manufactured by TE Connectivity Potter & Brumfield Relays and maintains active product status with current manufacturing availability.

Differences in coil current (8.3 mA vs. 20.8 mA) and release time (25 ms vs. 10 ms) are within acceptable operational variance for general purpose relay applications. The PCK-124D2M,000 operates across a slightly narrower temperature range (-30°C to 85°C versus -40°C to 85°C), which is acceptable for most industrial and commercial applications.

The ALE74B24 carries CSA, TUV, UR, and VDE approvals. Verification of equivalent certifications for the PCK-124D2M,000 should be confirmed against specific application requirements and regional compliance standards.

Frequently Asked Questions (FAQ)

Q: Can the PCK-124D2M,000 be used as a direct replacement for the ALE74B24?

A: Yes. Both relays meet identical specifications for coil voltage (24VDC), contact configuration (SPST-NO), current rating (16A), switching voltage (277VAC max), mounting type (through hole), and termination style (PC Pin, Quick Connect - 0.187"). Physical and electrical compatibility is confirmed.

Q: What is the difference in coil current between these two relays?

A: The ALE74B24 draws 8.3 mA while the PCK-124D2M,000 draws 20.8 mA. This difference reflects different coil resistance values (2.88 kOhms vs. 1.15 kOhms). Both operate at 24VDC and meet the same must-operate and must-release voltage thresholds. Circuit design should account for the higher coil current requirement of the substitute part.

Q: Why is the release time different?

A: The PCK-124D2M,000 has a faster release time (10 ms) compared to the ALE74B24 (25 ms). This represents improved performance characteristics and does not prevent substitution. Applications requiring specific release timing should verify compatibility with the faster response.

Q: What is the operating temperature difference?

A: The ALE74B24 operates from -40°C to 85°C, while the PCK-124D2M,000 operates from -30°C to 85°C. For applications requiring operation below -30°C, the original ALE74B24 specification must be maintained. For standard industrial and commercial temperature ranges, the substitute part is suitable.

Q: Are there any compliance or certification differences?

A: The ALE74B24 carries CSA, TUV, UR, and VDE approvals. Certification status for the PCK-124D2M,000 should be verified against application-specific regulatory requirements before final selection.

Q: Is the PCK-124D2M,000 currently available?

A: Yes. The PCK-124D2M,000 is classified as an active product with 878 pieces in current inventory, ensuring supply continuity for new designs and replacement applications.