Littelfuse M-484 Toggle Switch SPST 10A 12V - Equivalent & Substitute Parts

Part Overview

The Littelfuse M-484 is a panel-mounted toggle switch with SPST (Single Pole Single Throw) circuit configuration, rated for 10A DC at 12V. This component features a standard round actuator with screw terminal connections and circular panel cutout dimensions of 11.90mm diameter. The M-484 is classified as obsolete, making identification of compatible substitute parts essential for ongoing system maintenance and new design implementations.

Substiute Parts

M-484

Littelfuse Inc.In Stock: 916M-484 Datasheet

Current PartRFQ

CT31001N020

APEM Inc.In Stock: 1027CT31001N020 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the M-484 is determined by the following critical parameters:

• Circuit Configuration: Must be SPST to maintain identical switching logic
• Switch Function: Must be On-Off operation
• Current Rating: Substitute must support minimum 10A DC
• Voltage Rating: Substitute must support minimum 12V DC
• Mounting Type: Must be Panel Mount for mechanical compatibility
• Actuator Type: Must be Standard Round for user interface consistency
• Termination Style: Must be Screw Terminal for electrical connection compatibility
• Panel Cutout Dimensions: Must accommodate circular 11.90mm diameter or smaller with compatible bushing thread (15/32-32)

The APEM Inc. CT31001N020 meets all substitution criteria. This part maintains identical SPST circuit configuration and On-Off function while exceeding the M-484's electrical ratings (15A DC at 28V) and providing enhanced environmental protection (IP67 rating) and RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

The CT31001N020 from APEM Inc. is the qualified substitute for the obsolete M-484. Selection is based on the following engineering factors:

Electrical Compatibility: The CT31001N020 exceeds the M-484's electrical specifications with 15A DC current rating at 28V, providing margin above the original 10A at 12V requirement.

Mechanical Compatibility: Both parts share identical SPST circuit configuration, On-Off function, panel mount design, standard round actuator, and screw terminal termination. Actuator lengths are equivalent (17.46mm vs. 17.50mm), and bushing threads match (15/32-32). Panel cutout diameter difference (11.90mm vs. 12.20mm) is within acceptable mechanical tolerance for panel mount applications.

Product Status and Compliance: The M-484 is obsolete with no active manufacturing. The CT31001N020 is an active product with RoHS3 compliance, ensuring long-term availability and regulatory alignment for new designs and system updates.

Environmental Performance: The CT31001N020 provides IP67 ingress protection and specified operating temperature range (-40°C to 85°C), offering enhanced reliability compared to the M-484's unspecified environmental ratings.

Frequently Asked Questions (FAQ)

Q: Can the CT31001N020 directly replace the M-484 in existing applications?

A: Yes. Both parts maintain identical SPST circuit configuration, On-Off switching function, panel mount design, and screw terminal connections. The CT31001N020's higher electrical ratings (15A DC at 28V) and IP67 protection provide enhanced performance without requiring circuit modifications.

Q: What is the panel cutout compatibility between these parts?

A: The M-484 requires an 11.90mm circular cutout, while the CT31001N020 requires 12.20mm. The 0.30mm difference is within standard mechanical tolerance for panel mount applications. Existing panel cutouts for the M-484 may require minor enlargement to accommodate the CT31001N020.

Q: Are there compliance differences between these parts?

A: Yes. The M-484 is RoHS non-compliant, while the CT31001N020 is RoHS3 compliant. For new designs or systems requiring regulatory compliance, the CT31001N020 is the appropriate selection.

Q: What is the actuator length difference impact?

A: The actuator length difference is 0.04mm (17.46mm vs. 17.50mm), which is negligible for panel-mounted toggle switch applications and does not affect functional performance or user interface consistency.

Q: Does the CT31001N020 provide additional environmental protection?

A: Yes. The CT31001N020 includes IP67 ingress protection (dust tight and waterproof) and a specified operating temperature range of -40°C to 85°C. The M-484's environmental specifications are not provided, making the CT31001N020 suitable for applications requiring enhanced environmental resilience.

Q: What is the electrical life specification for the substitute part?

A: The CT31001N020 is rated for 10,000 electrical cycles. The M-484's electrical life is not specified in available documentation.