06R075BPR Polymeric PTC Resettable Fuse - Equivalent & Substitute Parts

Part Overview

The 06R075BPR is a polymeric PTC resettable fuse manufactured by Littelfuse Inc., part of the POLY-FUSE® and USBR series. This component is rated for 6V maximum voltage with a 750 mA hold current and is designed for through-hole radial mounting in disc configuration. The part is currently classified as obsolete, making identification of active equivalent components essential for ongoing design support and procurement.

Substiute Parts

06R075BPR

Littelfuse Inc.In Stock: 99806R075BPR Datasheet

Current PartRFQ

RUSBF075-2

Littelfuse Inc.In Stock: 1240RUSBF075-2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 06R075BPR is determined by strict equivalence across the following critical parameters:

• Voltage rating: 6V maximum
• Hold current (Ih): 750 mA maximum
• Trip current (It): 1.3 A
• Time to trip: 400 ms
• Mounting configuration: Through hole radial disc
• Physical dimensions: 0.272" diameter x 0.118" thickness (6.90mm x 3.00mm)
• Lead spacing: Nominal 0.20" (5.10mm)
• Resistance characteristics: Initial resistance minimum 100 mOhms, post-trip maximum 230 mOhms
• Operating temperature: -40°C to 85°C
• Regulatory compliance: ROHS3 compliant

The RUSBF075-2 meets all specified electrical and mechanical parameters and is classified as an active product, making it a direct functional equivalent for the obsolete 06R075BPR.

Parameter Comparison

Engineering Selection Recommendations

The RUSBF075-2 is the direct active equivalent for the obsolete 06R075BPR. Both components are manufactured by Littelfuse Inc. and share identical electrical specifications across all critical parameters: 6V voltage rating, 750 mA hold current, 1.3 A trip current, and 400 ms trip time. Physical dimensions and lead spacing are equivalent within standard manufacturing tolerances.

The RUSBF075-2 offers enhanced regulatory approval coverage with CSA, TUV, and UL certifications compared to the cURus and TUV certifications of the 06R075BPR. Both components maintain ROHS3 compliance. The RUSBF075-2 is actively manufactured and stocked, providing reliable long-term availability for new designs and production continuity.

Frequently Asked Questions (FAQ)

Q: Can the RUSBF075-2 be used as a direct replacement for the 06R075BPR in existing designs?

A: Yes. The RUSBF075-2 meets all electrical and mechanical specifications of the 06R075BPR. Both components have identical voltage ratings (6V), hold current (750 mA), trip current (1.3 A), and operating temperature range (-40°C to 85°C). Physical dimensions and lead spacing are compatible for through-hole radial mounting.

Q: What is the difference in initial resistance between these parts?

A: The 06R075BPR specifies a minimum initial resistance of 100 mOhms, while the RUSBF075-2 specifies 110 mOhms. Both values fall within acceptable operating parameters for polymeric PTC resettable fuses and do not affect functional equivalence in circuit applications.

Q: Are there differences in lead spacing that could affect PCB compatibility?

A: Lead spacing differs slightly: 06R075BPR at 0.201" (5.10mm) and RUSBF075-2 at 0.199" (5.05mm). This 0.002" (0.05mm) difference is within standard manufacturing tolerances for radial through-hole components and does not require PCB redesign.

Q: What packaging options are available for the RUSBF075-2?

A: The RUSBF075-2 is supplied in Cut Tape (CT) packaging. The 06R075BPR packaging specification was not provided in the available data.

Q: Does the RUSBF075-2 have better regulatory approvals than the 06R075BPR?

A: The RUSBF075-2 carries CSA, TUV, and UL approvals, while the 06R075BPR carries cURus and TUV approvals. Both are ROHS3 compliant. The expanded approval set of the RUSBF075-2 may provide additional compliance benefits for certain applications and markets.