HC4D-DC48V-D General Purpose Relay 4PDT 48VDC Equivalent & Substitute Parts

Part Overview

The HC4D-DC48V-D is a general purpose relay manufactured by Panasonic Electric Works, featuring a 4PDT (4 Form C) contact configuration with 3A contact rating and 48VDC coil voltage. This relay is classified as obsolete, making identification of suitable substitute components essential for ongoing system maintenance and new design implementations. The HC4D-DC48V-D serves applications requiring reliable switching of multiple independent circuits with moderate current capacity in industrial control systems.

Substiute Parts

HC4D-DC48V-D

Panasonic Electric WorksIn Stock: 854HC4D-DC48V-D Datasheet

Current PartRFQ

MY4N-D2 DC48 (S)

Omron Automation and SafetyIn Stock: 802MY4N-D2 DC48 (S) Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HC4D-DC48V-D is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Coil voltage: 48VDC
• Contact form: 4PDT (4 Form C)
• Contact rating: 3 A minimum
• Coil type: Non Latching
• Must operate voltage: 38.4 VDC
• Must release voltage: 4.8 VDC
• Operate time: 20 ms
• Release time: 20 ms

Acceptable Variation Parameters:

• Switching voltage: Equal to or greater than 250VAC
• Operating temperature range: Equal to or wider than -50°C ~ 70°C
• Coil current: Within ±2% of 18.5 mA
• Coil resistance: Within ±5% of 2.6 kOhms
• Contact material: Alternative precious metal compositions acceptable if electrical performance is maintained
• Mounting type: May differ (socketable vs. direct mount) if mechanical integration is feasible
• Product status: Active status preferred for long-term availability

The MY4N-D2 DC48 (S) manufactured by Omron Automation and Safety meets all mandatory matching parameters and acceptable variation criteria, qualifying it as a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The MY4N-D2 DC48 (S) is a qualified substitute for the HC4D-DC48V-D based on the following engineering criteria:

Electrical Equivalence: All critical electrical parameters match or exceed the original specification. Coil voltage, contact configuration, contact rating, switching voltage, and timing parameters are identical or within acceptable engineering tolerances. Coil current and resistance variations are within ±2% and ±5% respectively, ensuring compatible circuit behavior.

Operational Compatibility: The substitute maintains identical must-operate and must-release voltage thresholds, operate time, and release time, ensuring predictable relay behavior in existing control circuits without modification to drive electronics or logic timing.

Product Status Advantage: The MY4N-D2 DC48 (S) carries active product status with RoHS compliance certification, providing superior long-term availability and regulatory alignment compared to the obsolete HC4D-DC48V-D.

Mechanical Integration Consideration: The MY4N-D2 DC48 (S) features socketable mounting versus the direct mount configuration of the original part. Mechanical integration requires socket base compatibility verification in the target application.

Additional Features: The Omron substitute includes a lighted indicator feature not present in the original specification. This addition does not compromise functional equivalence and may provide operational benefits in system diagnostics.

Frequently Asked Questions (FAQ)

Q: Can the MY4N-D2 DC48 (S) be used as a direct replacement for the HC4D-DC48V-D without circuit modification?

A: Electrical substitution is direct. The coil voltage, contact configuration, contact rating, and all timing parameters are identical. No circuit modification is required for electrical functionality. Mechanical mounting requires socket base compatibility verification.

Q: What is the significance of the socketable mounting type on the MY4N-D2 DC48 (S)?

A: Socketable mounting allows the relay to be inserted into a standardized socket base rather than soldered or wired directly. This requires the target application to have a compatible socket base. Direct wiring is still possible if a socket base is not available, but this negates the socketable design advantage.

Q: Are the coil current and resistance differences between the two relays significant?

A: No. The coil current difference of 0.3 mA (18.5 mA vs. 18.8 mA) represents a 1.6% variation. The coil resistance difference of 0.04 kOhms (2.6 kOhms vs. 2.56 kOhms) represents a 1.5% variation. Both variations are within standard engineering tolerances and will not affect circuit performance in typical industrial control applications.

Q: Does the lighted indicator feature on the MY4N-D2 DC48 (S) affect substitution compatibility?

A: No. The lighted indicator is an additional feature that does not interfere with the core relay function. It provides visual indication of relay state and may be beneficial for system diagnostics. The feature does not compromise functional equivalence.

Q: What is the impact of the different contact material composition?

A: The MY4N-D2 DC48 (S) uses silver (Ag) contact material versus the silver nickel (AgNi) and gold (Au) composition of the HC4D-DC48V-D. Silver contacts are standard in industrial relay applications and provide equivalent electrical performance for the specified switching voltage and current ratings. Contact material selection does not affect substitution validity for this application.

Q: Why is the MY4N-D2 DC48 (S) preferred over the obsolete HC4D-DC48V-D?

A: The MY4N-D2 DC48 (S) carries active product status, ensuring long-term availability and supply chain reliability. It also holds RoHS compliance certification, meeting current regulatory requirements. The obsolete status of the HC4D-DC48V-D creates supply risk and potential regulatory non-compliance in new designs or system upgrades.

Q: Are there any temperature range considerations for substitution?

A: The MY4N-D2 DC48 (S) operating temperature range of -55°C ~ 70°C is wider than the HC4D-DC48V-D range of -50°C ~ 70°C. This provides superior performance in low-temperature environments. No temperature-related substitution limitations exist.