MF-R015/600-B-2 Equivalent & Substitute Parts

Part Overview

The MF-R015/600-B-2 is a polymeric PTC resettable fuse manufactured by Bourns Inc., rated for 250V (600V internal) with a 150 mA hold current. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement planning. Substitute parts must maintain electrical performance within the specified parameter ranges while accommodating available packaging and certification options.

Substiute Parts

MF-R015/600-B-2

Bourns Inc.In Stock: 1026MF-R015/600-B-2 Datasheet

Current PartRFQ

TRF600-150-2

Littelfuse Inc.In Stock: 2107TRF600-150-2 Datasheet

SimilarRFQ

TRF600-150-RB

Littelfuse Inc.In Stock: 1415TRF600-150-RB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MF-R015/600-B-2 is determined by the following criteria:

• Voltage rating: 250V (600V internal) minimum
• Current hold (Ih): 150 mA maximum
• Current trip (It): 300 mA
• Mounting type: Through Hole
• Package type: Radial configuration
• Lead spacing: 0.197" (5.00mm)
• Operating temperature range: -40°C ~ 85°C
• Polymeric PTC resettable fuse technology

The identified substitutes are Littelfuse PolySwitch® series components: TRF600-150-2 and TRF600-150-RB. Both maintain the core electrical specifications and mechanical compatibility required for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

Both TRF600-150-2 and TRF600-150-RB meet the core electrical and mechanical requirements for substitution. Selection between these options depends on certification requirements and packaging constraints:

TRF600-150-2 is suitable for applications requiring UL certification in Cut Tape packaging format.

TRF600-150-RB provides expanded certification coverage (CSA, TUV, UL) and is available in Bag packaging. This variant is recommended for applications with multi-agency compliance requirements.

The MF-R015/600-B-2 original part carries cURus and TUV certifications. Verification of certification acceptance in the target application is necessary when transitioning to substitute parts with different approval agency markings.

Frequently Asked Questions (FAQ)

Q: Can TRF600-150-2 and TRF600-150-RB be used interchangeably with MF-R015/600-B-2?

A: Both Littelfuse parts maintain the critical electrical parameters (250V, 150 mA hold current, 300 mA trip current) and mechanical compatibility (Through Hole, Radial, 5.00mm lead spacing). Substitution is valid provided the application certifications align with the approval agencies listed for each part.

Q: What is the difference between TRF600-150-2 and TRF600-150-RB?

A: The primary differences are packaging format (Cut Tape vs. Bag) and certification scope. TRF600-150-RB includes CSA certification in addition to TUV and UL. Both maintain identical voltage, hold current, and trip current specifications.

Q: Are there differences in response time between the substitute parts?

A: Time to trip varies: MF-R015/600-B-2 (5 s), TRF600-150-2 (4 s), and TRF600-150-RB (3 s). These differences fall within normal manufacturing tolerances for polymeric PTC resettable fuses and do not affect functional substitution for standard circuit protection applications.

Q: What is the significance of the different Current - Max ratings?

A: MF-R015/600-B-2 and TRF600-150-2 are rated for 3 A maximum current, while TRF600-150-RB is rated for 40 A. The hold current (150 mA) and trip current (300 mA) remain identical across all three parts. The maximum current rating indicates the upper limit the device can handle without permanent damage; selection should be based on actual circuit requirements.

Q: Are all three parts RoHS3 compliant?

A: Yes. MF-R015/600-B-2, TRF600-150-2, and TRF600-150-RB are all ROHS3 compliant and REACH unaffected.