HC4D-HTM-AC115V Equivalent & Substitute Parts

Part Overview

The HC4D-HTM-AC115V is a general purpose relay manufactured by Panasonic Electric Works, featuring a 4PDT (4 Form C) contact configuration with a 115VAC coil and 3A contact rating. This chassis mount relay is designed for industrial control applications requiring reliable switching of AC circuits at 250VAC maximum.

The HC4D-HTM-AC115V is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain system functionality and ensure continued availability for replacement and new designs.

Substiute Parts

HC4D-HTM-AC115V

Panasonic Electric WorksIn Stock: 838HC4D-HTM-AC115V Datasheet

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MY4 AC110/120 (S)

Omron Automation and SafetyIn Stock: 1261MY4 AC110/120 (S) Datasheet

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PT570615

TE Connectivity Potter & Brumfield RelaysIn Stock: 982PT570615 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the HC4D-HTM-AC115V are identified based on the following critical parameters that determine functional equivalence:

• Coil Voltage Compatibility: Substitute parts must operate within the 115VAC nominal range, with acceptable must-operate and must-release voltage windows
• Contact Configuration: All substitutes maintain 4PDT (4 Form C) contact form
• Contact Rating: Substitutes must support minimum 3A current rating
• Switching Voltage: Maximum switching voltage must be at least 250VAC
• Coil Type: Non-latching operation required
• Termination: Plug-in termination style for circuit board or socket mounting

Two substitute parts meet these criteria: the Omron MY4 AC110/120 (S) and the TE Connectivity PT570615. Both maintain the essential electrical characteristics while offering different mounting configurations and enhanced features.

Parameter Comparison

Engineering Selection Recommendations

MY4 AC110/120 (S) is the primary substitute for direct electrical equivalence. This Omron relay maintains identical contact rating (3A), switching voltage (250VAC), and timing characteristics (20ms operate/release). The 120VAC coil voltage is within acceptable tolerance of the 115VAC specification. The socketable mounting configuration provides flexibility for retrofit applications. This part is currently active in production and carries RoHS compliance certification.

PT570615 serves as an alternative substitute with enhanced current capacity (6A contact rating). This TE Connectivity relay matches the original 115VAC coil voltage and must-operate/release voltage thresholds. The socketable mounting with quick-connect termination option accommodates various installation requirements. The PT570615 is active in production and ROHS3 compliant. The higher current rating provides margin for applications with increased load requirements.

Both substitutes are active products with current manufacturing support, addressing the obsolescence of the original HC4D-HTM-AC115V.

Frequently Asked Questions (FAQ)

Q: Can the MY4 AC110/120 (S) directly replace the HC4D-HTM-AC115V?

A: Yes. Both relays share identical 4PDT contact configuration, 3A contact rating, 20ms timing, and compatible coil voltage specifications (120VAC vs. 115VAC nominal). The socketable mounting accommodates standard relay sockets used in industrial control panels.

Q: What is the difference between the two substitute options?

A: The MY4 AC110/120 (S) provides direct electrical equivalence at 3A contact rating. The PT570615 offers higher contact capacity (6A) and includes mechanical indicator and test button features. Both are socketable and plug-in compatible.

Q: Does the coil voltage difference between 115VAC and 120VAC affect compatibility?

A: No. The 120VAC coil voltage of the MY4 AC110/120 (S) falls within the acceptable operating range. The must-operate voltage (96VAC) and must-release voltage (36VAC) specifications confirm reliable operation in 115VAC nominal circuits.

Q: Are there mounting considerations when substituting?

A: The original HC4D-HTM-AC115V is chassis mount. Both substitutes are socketable, requiring a standard relay socket for installation. This is a standard retrofit approach in industrial control applications.

Q: What compliance certifications apply to the substitute parts?

A: The MY4 AC110/120 (S) is RoHS compliant. The PT570615 is ROHS3 compliant. Both are REACH unaffected and classified as EAR99 for export control purposes.

Q: Can the PT570615 be used in applications designed for 3A relays?

A: Yes. The PT570615 6A contact rating is a superset of the 3A requirement. The higher current capacity does not affect compatibility in 3A applications and provides additional margin for load variations.