ACV31212 Equivalent & Substitute Parts

Part Overview

The ACV31212 is an automotive SPST relay manufactured by Panasonic Electric Works, designed for 12VDC coil operation with a 20A contact rating. This part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and component procurement. The relay features non-latching operation, socketable mounting, and plug-in termination suitable for automotive applications requiring single-pole switching functionality.

Substiute Parts

ACV31212

Panasonic Electric WorksIn Stock: 859ACV31212 Datasheet

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ACVN51212

Panasonic Electric WorksIn Stock: 4262ACVN51212 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The ACVN51212 qualifies as a functional substitute for the ACV31212 based on the following alignment of critical parameters:

Matching Parameters:

• Coil voltage: 12VDC (identical)
• Contact form: SPST-NO (1 Form A) (identical)
• Mounting type: Socketable (identical)
• Termination style: Plug In (identical)
• Operating temperature range: -40°C ~ 85°C (identical)
• Contact material: Silver Alloy, Cadmium Free (identical)
• Coil type: Non Latching (identical)

Differing Parameters:

• Contact rating: 35A (versus 20A in ACV31212)
• Product status: Active (versus Obsolete)
• Coil current: 66.7 mA (versus 84 mA)
• Coil power: 800mW (versus 1W)
• Coil resistance: 180 Ohms (versus 142 Ohms)

The ACVN51212 provides higher current-switching capability while maintaining identical coil voltage, contact configuration, and mounting characteristics. The substitute is suitable for applications where the original 20A rating is adequate or where higher capacity provides design margin.

Parameter Comparison

Engineering Selection Recommendations

The ACVN51212 is the designated substitute for the obsolete ACV31212. Selection is based on:

• Product Status Alignment: The ACVN51212 maintains active production status, ensuring long-term availability and supply chain continuity.
• Compliance Certification: Both parts meet RoHS requirements. The ACVN51212 carries ROHS3 certification, representing current compliance standards.
• Functional Compatibility: Identical coil voltage (12VDC), contact configuration (SPST-NO), and mounting interface (socketable plug-in) ensure direct substitution without circuit redesign.
• Performance Enhancement: The 35A contact rating of the ACVN51212 exceeds the original 20A specification, providing design margin for applications within the original current envelope.
• Thermal Compatibility: Matching operating temperature range (-40°C ~ 85°C) maintains thermal performance across automotive environmental conditions.

Frequently Asked Questions (FAQ)

Q: Can the ACVN51212 directly replace the ACV31212 in existing designs?

A: Yes. Both relays share identical coil voltage (12VDC), contact form (SPST-NO), mounting type (socketable), and termination style (plug-in). The socketable mounting interface ensures mechanical and electrical compatibility without modification.

Q: What is the significance of the higher 35A contact rating in the ACVN51212?

A: The ACVN51212 provides 35A switching capacity compared to the ACV31212's 20A rating. For applications requiring 20A or less, the substitute operates within its rated capacity. The higher rating does not affect compatibility; it represents increased design margin.

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

A: The ACVN51212 requires 66.7 mA coil current at 12VDC, compared to 84 mA for the ACV31212. The substitute draws less coil current, reducing power dissipation from 1W to 800mW. Existing 12VDC coil drive circuits are compatible with this lower current requirement.

Q: How do the switching characteristics compare?

A: Both relays operate in 10 ms. The ACVN51212 releases in 10 ms versus 15 ms for the ACV31212, providing faster release response. Must-operate and must-release voltages are functionally equivalent (7 VDC and 0.5-0.6 VDC respectively).

Q: What packaging differences exist between these parts?

A: The ACV31212 is supplied in standard packaging, while the ACVN51212 is supplied in bulk packaging. Both use identical socketable plug-in termination suitable for relay socket mounting.

Q: Are both parts automotive-qualified?

A: Yes. Both relays are designated for automotive applications with identical operating temperature ranges (-40°C ~ 85°C) and contact materials (Silver Alloy, Cadmium Free). Both meet RoHS compliance requirements.