HC4D-H-AC120V Equivalent & Substitute Parts

Part Overview

The HC4D-H-AC120V is a general purpose relay manufactured by Panasonic Electric Works, featuring a 4PDT (4 Form C) contact configuration with a 120VAC coil. This socketable relay is designed for applications requiring 3A contact switching at up to 250VAC. The product is currently obsolete, making equivalent substitutes necessary for ongoing maintenance and new designs requiring compatible functionality.

Substiute Parts

HC4D-H-AC120V

Panasonic Electric WorksIn Stock: 912HC4D-H-AC120V Datasheet

Current PartRFQ

MY4Z-AC110/120

Omron Automation and SafetyIn Stock: 1003MY4Z-AC110/120 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HC4D-H-AC120V is determined by strict equivalence across the following critical parameters:

• Contact Configuration: 4PDT (4 Form C) contact form is mandatory for functional compatibility
• Coil Voltage: 120VAC coil specification must be maintained
• Contact Current Rating: 3A minimum contact rating required
• Switching Voltage: 250VAC maximum switching capability or higher
• Mounting Type: Socketable mounting with plug-in termination ensures mechanical compatibility
• Coil Operating Characteristics: Must operate at 96VAC minimum and release at 36VAC maximum
• Switching Speed: 20ms operate and release times define performance envelope

The MY4Z-AC110/120 from Omron Automation and Safety meets all substitution criteria and is classified as an active product with current availability.

Parameter Comparison

Engineering Selection Recommendations

The MY4Z-AC110/120 is the qualified substitute for the HC4D-H-AC120V based on the following engineering criteria:

Functional Equivalence: Both relays meet identical specifications for contact form, coil voltage, contact current rating, switching voltage, and coil operating characteristics. Switching speed and temperature operating range are equivalent or superior.

Product Status: The MY4Z-AC110/120 is an active product with current manufacturing status and documented inventory availability, ensuring long-term supply continuity compared to the obsolete HC4D-H-AC120V.

Compliance: The MY4Z-AC110/120 carries RoHS Compliant and REACH Unaffected certifications, meeting modern regulatory requirements. Both products share identical ECCN and HTSUS classifications.

Performance Advantages: The Omron substitute exhibits lower coil current (8.4 mA vs. 11.9 mA), reducing power consumption in the control circuit. Extended operating temperature range (-55°C vs. -50°C minimum) provides broader environmental compatibility. Dual switching voltage capability (250VAC and 125VDC) expands application flexibility.

Frequently Asked Questions (FAQ)

Q: Can the MY4Z-AC110/120 directly replace the HC4D-H-AC120V in existing applications?

A: Yes. Both relays share identical contact form (4PDT), coil voltage (120VAC), contact current rating (3A), switching voltage (250VAC), mounting type (socketable), and coil operating characteristics (96VAC must operate, 36VAC must release). Mechanical and electrical compatibility is confirmed.

Q: What are the key differences between these two relays?

A: The primary differences are coil current (MY4Z-AC110/120 draws 8.4 mA vs. 11.9 mA for HC4D-H-AC120V), coil resistance (4.43 kOhms vs. 10.084 kOhms), contact material composition (silver vs. silver nickel/gold), and operating temperature minimum (-55°C vs. -50°C). The MY4Z-AC110/120 also supports 125VDC switching in addition to 250VAC.

Q: Are there any circuit design considerations when substituting?

A: The lower coil current of the MY4Z-AC110/120 may require circuit verification if the original design relied on specific current draw characteristics. The lower coil resistance should be confirmed compatible with existing drive circuits. Contact material differences do not affect standard switching applications.

Q: What is the pin configuration compatibility?

A: The HC4D-H-AC120V uses 14-pin plug-in termination. The MY4Z-AC110/120 uses plug-in termination compatible with standard 4PDT socketable relay bases. Physical socket compatibility must be confirmed for the specific relay base in use.

Q: Why is the HC4D-H-AC120V obsolete?

A: Product obsolescence reflects manufacturer discontinuation. The MY4Z-AC110/120 provides equivalent functionality with active production status and modern compliance certifications, making it the appropriate long-term solution.