CMF-SD25-2 Equivalent & Substitute Parts

Part Overview

The CMF-SD25-2 is a ceramic PTC resettable fuse manufactured by Bourns Inc., rated for 230V (600V internal) with a 130 mA hold current. This component is designed for surface mount applications in 4-SMD cube packaging. The part is currently obsolete, making identification of compatible substitutes essential for ongoing system support and component procurement.

Substiute Parts

CMF-SD25-2

Bourns Inc.In Stock: 925CMF-SD25-2 Datasheet

Current PartRFQ

CMF-SDP25A-2

Bourns Inc.In Stock: 3157CMF-SDP25A-2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The CMF-SDP25A-2 qualifies as a direct substitute based on the following critical parameters:

• Voltage rating: 230V maximum (meets or exceeds requirement)
• Current - Hold (Ih): 130 mA (identical)
• Current - Trip (It): 260 mA (identical)
• Current - Max: 2.8 A (identical)
• Time to Trip: 300 ms (identical)
• Resistance - 25°C: 25 Ohms (identical)
• Mounting Type: Surface Mount (identical)
• Package / Case: 4-SMD Cube (identical)
• RoHS Status: ROHS3 Compliant (identical)
• MSL: 1 (Unlimited) (identical)

The CMF-SDP25A-2 maintains all critical electrical and mechanical parameters required for functional equivalence. Physical dimensions differ slightly, but both parts conform to 4-SMD cube packaging standards.

Parameter Comparison

Engineering Selection Recommendations

The CMF-SDP25A-2 is the appropriate substitute for the obsolete CMF-SD25-2. Both parts maintain identical electrical performance characteristics and are manufactured by Bourns Inc. within the same product family.

The CMF-SDP25A-2 carries active product status, ensuring ongoing availability and supply chain continuity. Both parts maintain ROHS3 compliance. The CMF-SDP25A-2 is subject to REACH regulations, whereas the CMF-SD25-2 is REACH unaffected; this distinction must be evaluated within the context of your application's regulatory requirements.

Physical dimensions are slightly reduced in the CMF-SDP25A-2, which may require PCB layout verification to confirm fit within existing footprints. The substitute part is supplied in Tape & Reel packaging, supporting automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the CMF-SDP25A-2 directly replace the CMF-SD25-2 in existing designs?

A: Yes. Both parts share identical electrical parameters: 230V maximum voltage, 130 mA hold current, 260 mA trip current, 2.8 A maximum current, 300 ms trip time, and 25 Ohms resistance at 25°C. Both are surface mount 4-SMD cube packages. Physical dimensions differ slightly; PCB layout verification is required.

Q: What is the primary reason for substitution?

A: The CMF-SD25-2 is obsolete. The CMF-SDP25A-2 is an active product from the same manufacturer with equivalent electrical specifications.

Q: Are there packaging differences?

A: The CMF-SD25-2 packaging type is not specified in available data. The CMF-SDP25A-2 is supplied in Tape & Reel format, suitable for automated assembly. Both conform to 4-SMD cube package standards.

Q: What are the dimensional differences?

A: CMF-SD25-2: 0.402" L x 0.354" W x 0.425" thick. CMF-SDP25A-2: 0.344" L x 0.283" W x 0.402" thick. The substitute is slightly smaller; verify PCB footprint compatibility.

Q: Are there regulatory compliance differences?

A: Both parts are ROHS3 compliant. The CMF-SDP25A-2 is REACH affected, while the CMF-SD25-2 is REACH unaffected. Evaluate regulatory requirements for your application.

Q: What is the internal voltage rating difference?

A: CMF-SD25-2: 600V internal. CMF-SDP25A-2: 250V internal. Both are rated 230V maximum. The internal rating difference does not affect external electrical performance specifications.