HC4D-DC12V-D General Purpose Relay 4PDT 12VDC Equivalent & Substitute Parts

Part Overview

The HC4D-DC12V-D is a general purpose relay manufactured by Panasonic Electric Works, featuring a 4PDT (4 Form C) contact configuration with a 12VDC coil and 3A contact rating. This relay is classified as obsolete, making identification of suitable substitute components essential for ongoing system maintenance and new design implementations. The HC series relay provides non-latching operation with integrated diode protection, suitable for general industrial switching applications requiring 250VAC maximum switching voltage.

Substiute Parts

HC4D-DC12V-D

Panasonic Electric WorksIn Stock: 1059HC4D-DC12V-D Datasheet

Current PartRFQ

MY4ZN-D2 DC12 (S)

Omron Automation and SafetyIn Stock: 944MY4ZN-D2 DC12 (S) Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the HC4D-DC12V-D is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Coil Voltage: 12VDC
• Contact Form: 4PDT (4 Form C)
• Contact Rating (Current): 3 A
• Coil Type: Non Latching
• Coil Current: 75 mA
• Coil Resistance: 160 Ohms
• Must Operate Voltage: 9.6 VDC
• Must Release Voltage: 1.2 VDC
• Operate Time: 20 ms
• Release Time: 20 ms

Acceptable Variation Parameters:

• Switching Voltage: 250VAC or higher
• Operating Temperature Range: -55°C ~ 70°C or wider
• Contact Material: Silver (Ag), Silver Nickel (AgNi), or Gold (Au)
• Features: Diode with or without additional features (Lighted Indicator)
• Mounting Type: DIP or Socketable configurations
• Product Status: Active preferred for long-term availability

The MY4ZN-D2 DC12 (S) manufactured by Omron Automation and Safety meets all mandatory matching parameters and qualifies as a direct substitute for the HC4D-DC12V-D.

Parameter Comparison

Engineering Selection Recommendations

The MY4ZN-D2 DC12 (S) is the qualified substitute for the HC4D-DC12V-D based on the following engineering criteria:

Electrical Equivalence: All critical electrical parameters match exactly, including coil voltage, contact configuration, current rating, timing characteristics, and operating voltage thresholds. The substitute provides expanded switching voltage capability (125VDC in addition to 250VAC), which represents an enhancement without introducing incompatibility.

Product Status Advantage: The MY4ZN-D2 DC12 (S) carries Active product status, ensuring continued availability and supply chain reliability compared to the obsolete HC4D-DC12V-D. This is a significant advantage for long-term system support and future procurement.

Compliance and Certification: Both components share identical ECCN (EAR99) and HTSUS (8536.41.0020) classifications. The MY4ZN-D2 DC12 (S) includes RoHS Compliance certification, meeting modern environmental and regulatory requirements.

Mounting and Integration: The socketable design with plug-in termination of the MY4ZN-D2 DC12 (S) offers improved serviceability compared to DIP mounting. This substitution may require socket adapter consideration in existing designs, but provides superior field replacement capability.

Temperature Performance: The extended operating temperature range of the MY4ZN-D2 DC12 (S) (-55°C ~ 70°C versus -50°C ~ 70°C) provides additional margin for extreme environment applications.

Frequently Asked Questions (FAQ)

Q: Can the MY4ZN-D2 DC12 (S) be used as a direct replacement for the HC4D-DC12V-D in existing circuits?

A: Yes. The MY4ZN-D2 DC12 (S) meets all mandatory electrical parameters. The primary integration consideration is the socketable mounting type versus DIP configuration. If the original design uses a DIP socket, a compatible socket adapter is required. If the original design uses direct PCB soldering, the socketable design may require circuit board modification or use of a socket assembly.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is determined by exact matching of: coil voltage (12VDC), contact form (4PDT), contact current rating (3A), coil current (75 mA), coil resistance (160 Ohms), must-operate voltage (9.6 VDC), must-release voltage (1.2 VDC), and timing characteristics (20 ms operate and release times). Switching voltage, operating temperature range, and contact material may vary within specified limits without affecting substitution validity.

Q: Does the lighted indicator feature on the MY4ZN-D2 DC12 (S) affect compatibility?

A: No. The lighted indicator is an additional feature that does not affect the core relay switching function. If the indicator feature is not required in the application, it remains inactive and does not impact circuit operation. If indicator functionality is desired, the feature is available without additional configuration.

Q: Are there packaging or inventory considerations for this substitution?

A: The HC4D-DC12V-D is available in 969 pieces as new original stock. The MY4ZN-D2 DC12 (S) is available in 868 pieces as new original stock in bulk packaging. Both components carry MSL 1 (Unlimited) moisture sensitivity rating, requiring standard handling practices. The socketable design of the MY4ZN-D2 DC12 (S) may affect packaging density and storage requirements compared to DIP configuration.

Q: What is the temperature performance difference between these relays?

A: The HC4D-DC12V-D operates from -50°C to 70°C. The MY4ZN-D2 DC12 (S) operates from -55°C to 70°C, providing an additional 5°C margin at the lower temperature extreme. Both relays maintain identical performance within the overlapping temperature range of -50°C to 70°C.

Q: How do the contact materials compare?

A: The HC4D-DC12V-D uses Silver Nickel (AgNi) and Gold (Au) contact materials. The MY4ZN-D2 DC12 (S) uses Silver (Ag) contact material. Both materials are suitable for general purpose switching applications at 3A and 250VAC. Contact material selection does not affect substitution validity for this application category.