CMF-SD10-2 Equivalent & Substitute Parts

Part Overview

The CMF-SD10-2 is a ceramic PTC resettable fuse manufactured by Bourns Inc., rated for 220V (600V internal) with a 150 mA hold current. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and procurement planning. The CMF-SD10-2 operates as a thermal protection device in surface mount applications requiring compact 4-SMD cube packaging.

Substiute Parts

CMF-SD10-2

Bourns Inc.In Stock: 1151CMF-SD10-2 Datasheet

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CMF-SDP75-2

Bourns Inc.In Stock: 1083CMF-SDP75-2 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CMF-SD10-2 is determined by the following critical parameters:

• Voltage rating compatibility (minimum 220V maximum rating required)
• Current hold (Ih) rating suitable for circuit protection requirements
• Surface mount 4-SMD cube package compatibility
• Ceramic PTC resettable fuse technology
• RoHS3 compliance and MSL rating consistency

The CMF-SDP75-2 qualifies as a substitute based on shared voltage class (230V rated, exceeding 220V requirement), identical package form factor (4-SMD Cube), matching mounting technology (surface mount), and equivalent compliance certifications (ROHS3 Compliant, MSL 1).

Parameter Comparison

Engineering Selection Recommendations

The CMF-SDP75-2 is an active product substitute for the obsolete CMF-SD10-2. Both components share identical internal voltage ratings (600V), surface mount package geometry (4-SMD Cube), and compliance certifications (ROHS3, MSL 1, EAR99). The CMF-SDP75-2 provides superior voltage margin (230V vs. 220V) and extended current handling capacity (2.5 A maximum vs. 1 A maximum).

Circuit designers must evaluate the lower hold current specification of the CMF-SDP75-2 (70 mA vs. 150 mA) against application requirements. The increased resistance at 25°C (75 Ohms vs. 10 Ohms) and faster trip time (120 ms vs. 4.5 s) represent functional differences requiring application-level validation. The CMF-SDP75-2 is available in active production status with established supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can the CMF-SDP75-2 directly replace the CMF-SD10-2 in existing designs?

A: Physical compatibility is confirmed through identical 4-SMD Cube package specifications and surface mount technology. Functional compatibility requires circuit-level analysis of the lower hold current (70 mA vs. 150 mA) and higher resistance (75 Ohms vs. 10 Ohms) characteristics.

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

A: The CMF-SDP75-2 operates at a lower hold current threshold (70 mA) with faster response time (120 ms), while the CMF-SD10-2 provides higher hold current (150 mA) with extended response time (4.5 s). Both maintain equivalent voltage ratings and package form factors.

Q: Is the CMF-SDP75-2 compliant with current regulatory requirements?

A: Yes. The CMF-SDP75-2 is ROHS3 compliant, REACH affected, and carries EAR99 export classification, matching the compliance profile of the CMF-SD10-2.

Q: What is the physical size difference between these components?

A: The CMF-SDP75-2 is marginally larger in length (0.433" vs. 0.402") while maintaining identical width (0.354"). Both components fit standard 4-SMD Cube footprints with compatible lead spacing.

Q: Why is the CMF-SD10-2 listed as obsolete?

A: The CMF-SD10-2 has been discontinued by Bourns Inc. The CMF-SDP75-2 represents the active product line continuation within the CMF ceramic PTC resettable fuse family.