HC4ED-H-DC48V Equivalent & Substitute Parts

Part Overview

The HC4ED-H-DC48V is a general purpose relay manufactured by Panasonic Electric Works, featuring a 4PDT (4 Form C) contact configuration with 48VDC coil voltage and 1A contact rating. This socketable relay is designed for plug-in termination applications requiring switching of 250VAC maximum. The product is currently obsolete, making identification of compatible substitute parts essential for system maintenance, repair, and redesign applications where continued availability is required.

Substiute Parts

HC4ED-H-DC48V

Panasonic Electric WorksIn Stock: 993HC4ED-H-DC48V Datasheet

Current PartRFQ

MY4Z DC48 (S)

Omron Automation and SafetyIn Stock: 957MY4Z DC48 (S) Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the HC4ED-H-DC48V is determined by strict alignment of the following critical parameters:

• Coil voltage: 48VDC (exact match required)
• Contact form: 4PDT (4 Form C) configuration (exact match required)
• Mounting type: Socketable with plug-in termination (exact match required)
• Coil type: Non-latching operation (exact match required)
• Must operate and release voltages: 38.4 VDC and 4.8 VDC respectively (exact match required)
• Operate and release times: 20 ms each (exact match required)

The MY4Z DC48 (S) manufactured by Omron Automation and Safety meets all critical substitution criteria. While the contact rating differs (3A versus 1A), this represents an upgrade in capability that maintains full backward compatibility for applications originally designed for the 1A HC4ED-H-DC48V.

Parameter Comparison

Engineering Selection Recommendations

The MY4Z DC48 (S) is the qualified substitute for the obsolete HC4ED-H-DC48V based on the following engineering criteria:

All critical electrical parameters align exactly: 48VDC coil voltage, 4PDT contact configuration, 20ms operate and release times, and identical must-operate and must-release voltage thresholds. The socketable mounting with plug-in termination ensures mechanical compatibility in existing relay socket installations.

The MY4Z DC48 (S) is an active product with current manufacturing support, eliminating supply chain risk associated with the obsolete HC4ED-H-DC48V. The Omron relay carries RoHS compliance certification, meeting modern regulatory requirements.

The contact rating upgrade from 1A to 3A provides enhanced current-switching capability without introducing any incompatibility. The expanded operating temperature range (-55°C to 70°C versus -40°C to 60°C) and dual switching voltage support (250VAC and 125VDC) extend application flexibility.

Coil resistance values are functionally equivalent (2.56 kOhms versus 2.6 kOhms), and coil current specifications are nearly identical (18.8 mA versus 18.5 mA), ensuring compatible drive circuit performance.

Frequently Asked Questions (FAQ)

Q: Can the MY4Z DC48 (S) be used as a direct replacement in existing HC4ED-H-DC48V applications?

A: Yes. The MY4Z DC48 (S) meets all critical substitution parameters including coil voltage, contact configuration, timing specifications, and socketable mounting. Direct socket substitution is supported.

Q: What is the significance of the higher 3A contact rating on the MY4Z DC48 (S)?

A: The 3A rating represents increased current-switching capacity compared to the original 1A specification. This upgrade maintains full backward compatibility for applications originally designed for 1A operation while enabling use in higher-current switching scenarios.

Q: Are there differences in coil drive requirements between these relays?

A: Coil current specifications are nearly identical (18.5 mA versus 18.8 mA) and coil resistance values are functionally equivalent (2.6 kOhms versus 2.56 kOhms). Existing drive circuits designed for the HC4ED-H-DC48V will operate the MY4Z DC48 (S) without modification.

Q: Does the MY4Z DC48 (S) support the same switching voltages?

A: The MY4Z DC48 (S) supports 250VAC and 125VDC maximum