CM1-R-P-12V Equivalent & Substitute Parts

Part Overview

The CM1-R-P-12V is a Panasonic Electric Works automotive SPDT relay rated for 35A at 12VDC. This through-hole mounted component features a non-latching coil, sealed construction, and cadmium-free silver alloy contacts. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing system support and component procurement.

Substiute Parts

CM1-R-P-12V

Panasonic Electric WorksIn Stock: 825CM1-R-P-12V Datasheet

Current PartRFQ

CB1-P-12V

Panasonic Electric WorksIn Stock: 18884CB1-P-12V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The CB1-P-12V qualifies as a substitute for the CM1-R-P-12V based on the following alignment of critical electrical and mechanical parameters:

Matching Parameters:

• Coil voltage: 12VDC (identical)
• Contact form: SPDT (1 Form C) (identical)
• Mounting type: Through hole (identical)
• Termination style: PC pin (identical)
• Operating temperature range: -40°C ~ 85°C (identical)
• Contact material: Silver alloy, cadmium free (identical)
• Coil type: Non latching (identical)
• Must operate voltage: 7 VDC (identical)
• Must release voltage: 1.2 VDC (identical)
• Switching voltage: 14VDC nominal (identical)

Allowable Variation:

• Contact rating: CB1-P-12V rated at 40A exceeds the CM1-R-P-12V requirement of 35A, providing margin for current-carrying capacity

Parameter Comparison

Engineering Selection Recommendations

The CB1-P-12V is suitable as a substitute for the CM1-R-P-12V in applications requiring a 12VDC automotive SPDT relay with through-hole PC pin termination. The CB1-P-12V is an active product with ROHS3 compliance, providing supply chain continuity for the obsolete CM1-R-P-12V. The higher current rating (40A vs. 35A) and lower coil power consumption (1.4W vs. 1.7W) of the CB1-P-12V represent functional improvements. Slightly increased switching times (15ms vs. 10ms for both operate and release) must be evaluated against application timing requirements. Both components maintain identical voltage thresholds, temperature operating range, and contact material specifications.

Frequently Asked Questions (FAQ)

Q: Can the CB1-P-12V directly replace the CM1-R-P-12V in existing designs?

A: Yes, provided the application timing tolerates the 5ms increase in operate and release times. All electrical parameters, mounting configuration, and termination style are compatible.

Q: What is the significance of the 40A vs. 35A current rating difference?

A: The CB1-P-12V's 40A rating exceeds the CM1-R-P-12V's 35A requirement, providing additional margin for current-carrying capacity without compromising compatibility.

Q: Are there packaging differences between these parts?

A: The CM1-R-P-12V is specified with "-" packaging (not detailed), while the CB1-P-12V is supplied in bulk packaging. Both use identical through-hole PC pin termination.

Q: What compliance advantages does the CB1-P-12V offer?

A: The CB1-P-12V carries ROHS3 compliance certification, whereas the CM1-R-P-12V compliance status is not specified. Both maintain REACH unaffected status.

Q: Are coil power differences significant for circuit design?

A: The CB1-P-12V consumes 1.4W compared to the CM1-R-P-12V's 1.7W, representing a 17.6% reduction in coil power. This may reduce thermal load in driver circuits but does not affect functional compatibility.