CMF-SD35A-2 Equivalent & Substitute Parts

Part Overview

The CMF-SD35A-2 is a ceramic PTC resettable fuse manufactured by Bourns Inc., rated for 230V (600V internal) with a 100 mA hold current. This component is designed for surface mount applications in a 4-SMD cube package. The part is currently obsolete, making identification of compatible substitutes essential for ongoing design support and component procurement.

Substiute Parts

CMF-SD35A-2

Bourns Inc.In Stock: 964CMF-SD35A-2 Datasheet

Current PartRFQ

CMF-SDP35A-2

Bourns Inc.In Stock: 7953CMF-SDP35A-2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The CMF-SDP35A-2 qualifies as a substitute based on the following critical parameters:

• Voltage rating: Both parts rated 230V (600V internal)
• Resistance value: Both maintain 35 Ohms at 25°C
• Mounting type: Both are surface mount components
• Package type: Both use 4-SMD cube configuration
• Trip time: Both specify 200 ms response time
• Compliance: Both are ROHS3 compliant with MSL 1

The CMF-SDP35A-2 is an active product from the same manufacturer and series, providing continuity for designs currently using the obsolete CMF-SD35A-2.

Parameter Comparison

Engineering Selection Recommendations

The CMF-SDP35A-2 is the direct substitute for the obsolete CMF-SD35A-2. Both components share identical voltage ratings, resistance values, and trip time specifications. The CMF-SDP35A-2 is currently in active production status, ensuring long-term availability and supply chain continuity.

Physical dimensions differ slightly between the two parts. The CMF-SDP35A-2 is marginally larger in length (0.344" vs 0.319"), width (0.283" vs 0.282"), and thickness (0.402" vs 0.335"). PCB layout verification is necessary to confirm fit within existing design constraints.

Both parts maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), supporting equivalent environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can CMF-SDP35A-2 directly replace CMF-SD35A-2 in existing designs?

A: The CMF-SDP35A-2 is electrically compatible as a substitute. Physical dimensions require verification against PCB layout constraints due to increased thickness and length.

Q: What are the differences in current ratings between these parts?

A: The CMF-SDP35A-2 has a higher hold current (110 mA vs 100 mA) and trip current (230 mA vs 200 mA). Both maintain the same 2.5 A maximum current rating and 200 ms trip time.

Q: Are both parts RoHS compliant?

A: Both CMF-SD35A-2 and CMF-SDP35A-2 are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level).

Q: What is the packaging difference?

A: The CMF-SD35A-2 is supplied in standard packaging, while the CMF-SDP35A-2 is available in Tape & Reel (TR) format, which is standard for high-volume surface mount assembly.

Q: Why is the CMF-SD35A-2 obsolete?

A: The CMF-SDP35A-2 represents the active product line continuation from Bourns Inc., offering improved specifications and ongoing manufacturing support.