Littelfuse 02040601Z Automotive Relay - Equivalent & Substitute Parts

Part Overview

The Littelfuse 02040601Z is a SPST (Single Pole Single Throw) automotive relay rated for 25A at 12VDC, designed for socketable mounting applications. This relay operates with a non-latching coil configuration and is classified as obsolete. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for system continuity and component procurement in automotive applications requiring SPST relay functionality.

Substiute Parts

02040601Z

Littelfuse Inc.In Stock: 114602040601Z Datasheet

Current PartRFQ

CM1A-12V

Panasonic Electric WorksIn Stock: 987CM1A-12V Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The Panasonic Electric Works CM1A-12V qualifies as a substitute for the Littelfuse 02040601Z based on the following critical parameters:

Matching Parameters:

• Contact Form: SPST-NO (1 Form A) — identical switching configuration
• Coil Voltage: 12VDC — identical operating voltage
• Coil Type: Non Latching — identical coil behavior
• Mounting Type: Socketable — compatible mechanical interface
• Termination Style: Plug In — compatible connection method
• RoHS Status: ROHS3 Compliant — equivalent environmental compliance
• Moisture Sensitivity Level: 1 (Unlimited) — equivalent handling requirements

Enhanced Capability: The CM1A-12V provides a higher contact rating of 35A compared to the 25A rating of the 02040601Z, making it suitable for applications requiring equal or lower current switching demands. The substitute maintains socketable mounting and plug-in termination compatibility, ensuring direct replacement feasibility in existing relay socket configurations.

Parameter Comparison

Engineering Selection Recommendations

The Panasonic Electric Works CM1A-12V is the designated substitute for the obsolete Littelfuse 02040601Z. Selection is based on:

• Product Status Alignment: The CM1A-12V maintains active production status, ensuring long-term component availability and supply chain continuity.
• Compliance Equivalence: Both parts maintain ROHS3 compliance and identical moisture sensitivity classification, satisfying regulatory and environmental requirements.
• Functional Compatibility: Identical contact form (SPST-NO), coil voltage (12VDC), and coil type (Non Latching) ensure direct functional replacement in automotive relay applications.
• Mechanical Compatibility: Socketable mounting and plug-in termination styles are identical, permitting direct installation in existing relay socket configurations without mechanical modification.
• Current Rating Enhancement: The 35A contact rating of the CM1A-12V exceeds the 25A requirement of the original part, providing margin for applications within the original specification range.

Frequently Asked Questions (FAQ)

Q: Can the Panasonic CM1A-12V directly replace the Littelfuse 02040601Z in existing applications?

A: Yes. Both relays share identical contact form (SPST-NO), coil voltage (12VDC), mounting type (socketable), and termination style (plug-in). The CM1A-12V can be installed directly into existing relay sockets designed for the 02040601Z.

Q: What is the significance of the higher 35A contact rating on the CM1A-12V compared to the 25A rating of the 02040601Z?

A: The higher contact rating indicates the CM1A-12V can safely switch currents up to 35A. For applications requiring 25A or less, the CM1A-12V operates within its rated capacity and is suitable for direct substitution.

Q: Are there packaging differences between these parts?

A: The Littelfuse 02040601Z is supplied in standard packaging, while the Panasonic CM1A-12V is supplied in bulk packaging. Both maintain identical moisture sensitivity level (MSL 1 - Unlimited), requiring no special handling modifications.

Q: Do both relays meet the same environmental compliance standards?

A: Yes. Both the Littelfuse 02040601Z and Panasonic CM1A-12V are ROHS3 compliant and carry identical moisture sensitivity classification (MSL 1), satisfying equivalent environmental and regulatory requirements.

Q: Why is the Littelfuse 02040601Z classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The Panasonic CM1A-12V provides functional and mechanical equivalence, ensuring continued availability for applications previously using the 02040601Z.