CB1AF-M-24V Equivalent & Substitute Parts

Part Overview

The CB1AF-M-24V is an automotive SPST relay manufactured by Panasonic Electric Works, designed for 24VDC coil operation with a 20A contact rating. This non-latching relay features sealed construction with flux protection, making it suitable for automotive and industrial applications requiring reliable switching performance. The part is currently active in production with full RoHS compliance and unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter ranges for this relay category.

Substiute Parts

CB1AF-M-24V

Panasonic Electric WorksIn Stock: 797CB1AF-M-24V Datasheet

Current PartRFQ

3-1393303-7

TE Connectivity AMP ConnectorsIn Stock: 42203-1393303-7 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CB1AF-M-24V is determined by the following critical parameters:

• Coil voltage must be 24VDC to ensure direct compatibility with existing circuit designs
• Contact form must remain SPST-NO (1 Form A) to maintain switching topology
• Termination style must be Quick Connect - 0.250" (6.3mm) for mechanical fit
• Mounting type must be Chassis Mount for installation compatibility
• RoHS compliance status must be maintained for regulatory requirements

The substitute part 3-1393303-7 (TE Connectivity AMP Connectors, F4 Series) meets all critical substitution criteria. While this part features a higher contact rating (60A versus 20A), this represents an upgrade in current-handling capability and does not prevent substitution in applications designed for the original 20A specification. The substitute maintains identical coil voltage, contact form, termination style, and mounting configuration.

Parameter Comparison

Engineering Selection Recommendations

Both the CB1AF-M-24V and 3-1393303-7 are active production parts with full RoHS compliance and identical export classification (EAR99). Selection between these parts should be based on application-specific requirements:

The CB1AF-M-24V is appropriate for applications with strict thermal constraints, as its operating temperature range extends to 85°C. The 3-1393303-7 provides extended temperature operation to 125°C, suitable for higher-temperature environments.

The 3-1393303-7 offers faster switching response (7ms operate time, 2ms release time) compared to the CB1AF-M-24V (15ms operate and release time), which may be advantageous in time-critical switching applications.

The contact rating difference (20A versus 60A) does not prevent substitution in circuits designed for 20A operation. The higher-rated substitute provides additional margin for current-handling capability.

Both parts maintain equivalent coil power consumption (1.8W) and nearly identical coil resistance values (320Ω versus 324Ω), ensuring compatible circuit behavior.

Frequently Asked Questions (FAQ)

Q: Can the 3-1393303-7 be used as a direct replacement for the CB1AF-M-24V?

A: Yes. Both parts share identical coil voltage (24VDC), contact form (SPST-NO), termination style (Quick Connect - 0.250"), and mounting configuration (Chassis Mount). The higher contact rating of the substitute does not prevent its use in applications designed for 20A operation.

Q: What are the key differences between these two relays?

A: The primary differences are contact rating (20A versus 60A), switching response time (15ms versus 7ms operate time), maximum operating temperature (85°C versus 125°C), and switching voltage specification (28VDC nominal versus 24VDC nominal). Coil voltage, power consumption, and termination compatibility remain identical.

Q: Are both parts RoHS compliant?

A: Yes. Both the CB1AF-M-24V and 3-1393303-7 are RoHS compliant with MSL rating of 1 (Unlimited) and identical ECCN and HTSUS classifications.

Q: Which part should be selected for high-temperature applications?

A: The 3-1393303-7 is rated for operation to 125°C, compared to 85°C for the CB1AF-M-24V. For applications exceeding 85°C ambient temperature, the TE Connectivity part is the appropriate selection.

Q: Do these relays have identical coil resistance?

A: The coil resistance values are nearly identical: CB1AF-M-24V at 320Ω and 3-1393303-7 at 324Ω. This minimal difference ensures compatible circuit behavior and equivalent coil power consumption (1.8W for both parts).