HC4D-DC6V-D Equivalent & Substitute Parts

Part Overview

The HC4D-DC6V-D is a general purpose relay manufactured by Panasonic Electric Works, featuring a 4PDT (4 Form C) contact configuration with 3A contact rating and 6VDC coil voltage. This relay is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and new design implementations. The HC series relay provides non-latching operation with integrated diode protection, suitable for industrial control and switching applications requiring 250VAC maximum switching voltage.

Key Parameters

Parameter	Value
Coil Voltage	6VDC
Contact Form	4PDT (4 Form C)
Contact Rating (Current)	3 A
Switching Voltage (Max)	250VAC
Coil Current	150 mA
Coil Type	Non Latching
Must Operate Voltage	4.8 VDC
Must Release Voltage	0.6 VDC
Operate Time	20 ms
Release Time	20 ms
Operating Temperature Range	-50°C ~ 70°C
Coil Resistance	40 Ohms
Relay Type	General Purpose

Substitute Part Grouping Explanation

Substitution of the HC4D-DC6V-D is determined by strict equivalence across the following critical parameters:

Coil voltage: 6VDC (exact match required)
Contact configuration: 4PDT (4 Form C) (exact match required)
Contact current rating: 3 A (exact match required)
Coil type: Non Latching (exact match required)
Must operate and release voltages: 4.8 VDC and 0.6 VDC respectively (exact match required)
Switching voltage capability: minimum 250VAC (equal or greater acceptable)
Operating temperature range: minimum -50°C to 70°C (equal or greater range acceptable)

The MY4N-D2 DC6 (S) manufactured by Omron Automation and Safety meets all critical substitution criteria and qualifies as a direct functional equivalent.

Parameter Comparison

Parameter	HC4D-DC6V-D (Panasonic)	MY4N-D2 DC6 (S) (Omron)	Compatibility
Coil Voltage	6VDC	6VDC	Equivalent
Contact Form	4PDT (4 Form C)	4PDT (4 Form C)	Equivalent
Contact Rating (Current)	3 A	3 A	Equivalent
Switching Voltage (Max)	250VAC	250VAC, 125VDC	Equivalent
Coil Current	150 mA	151 mA	Equivalent
Coil Type	Non Latching	Non Latching	Equivalent
Must Operate Voltage	4.8 VDC	4.8 VDC	Equivalent
Must Release Voltage	0.6 VDC	0.6 VDC	Equivalent
Operate Time	20 ms	20 ms	Equivalent
Release Time	20 ms	20 ms	Equivalent
Operating Temperature Range	-50°C ~ 70°C	-55°C ~ 70°C	Equivalent
Coil Resistance	40 Ohms	39.8 Ohms	Equivalent
Relay Type	General Purpose	General Purpose	Equivalent
Product Status	Obsolete	Active	Substitute is active
Mounting Type	Not specified	Socketable	Substitute offers socketable option

Engineering Selection Recommendations

The MY4N-D2 DC6 (S) is the qualified substitute for the obsolete HC4D-DC6V-D. Selection is based on the following engineering criteria:

All critical electrical parameters match exactly: coil voltage, contact configuration, contact current rating, coil type, and switching voltage capability. Timing characteristics (operate and release times) are identical at 20 ms. Operating temperature range of the MY4N-D2 DC6 (S) extends to -55°C, exceeding the HC4D-DC6V-D specification of -50°C, providing enhanced low-temperature performance.

The MY4N-D2 DC6 (S) maintains active product status with RoHS compliance certification, ensuring long-term availability and regulatory alignment. The socketable mounting type of the Omron relay provides installation flexibility not specified in the Panasonic part documentation.

Coil current specification differs marginally (151 mA versus 150 mA), representing a 0.67% variance within acceptable engineering tolerance for general purpose relay applications.

Frequently Asked Questions (FAQ)

Q: Can the MY4N-D2 DC6 (S) directly replace the HC4D-DC6V-D in existing circuits?

A: Yes. The MY4N-D2 DC6 (S) meets all critical electrical specifications: identical 6VDC coil voltage, 4PDT contact configuration, 3A contact rating, and 250VAC switching voltage capability. Coil current and resistance values are equivalent within standard engineering tolerance.

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

A: The HC4D-DC6V-D mounting type is not specified in available documentation. The MY4N-D2 DC6 (S) features socketable mounting, allowing installation into standard relay sockets. Physical package compatibility should be verified against your specific application requirements.

Q: Are there temperature range differences between these relays?

A: The MY4N-D2 DC6 (S) operates from -55°C to 70°C, while the HC4D-DC6V-D operates from -50°C to 70°C. The Omron relay provides 5°C additional low-temperature capability, making it suitable for applications requiring extended cold-temperature performance.

Q: What is the significance of the "Diode" and "Lighted Indicator" features?

A: Both relays include integrated diode protection for coil suppression. The MY4N-D2 DC6 (S) additionally features a lighted indicator for visual coil energization status. This feature does not affect electrical substitution compatibility but provides operational visibility benefit.

Q: Is the MY4N-D2 DC6 (S) RoHS compliant?

A: Yes. The MY4N-D2 DC6 (S) is RoHS compliant. The HC4D-DC6V-D RoHS status is not specified in available documentation.

Q: What is the inventory status of these parts?

A: The HC4D-DC6V-D (806 pcs) is obsolete with limited remaining stock. The MY4N-D2 DC6 (S) (913 pcs) is active production with current availability, ensuring reliable long-term supply for new designs and system maintenance.

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