Equivalent & Substitute Parts for 06R075BU

Part Overview

The 06R075BU is a Polymeric PTC Resettable Fuse manufactured by Littelfuse Inc., rated for 6V at 750 mA hold current. This component is classified as Obsolete, which necessitates identification of active equivalent parts for ongoing design support and procurement. The part is designed for through-hole radial mounting in applications requiring overcurrent protection with automatic reset capability.

Substiute Parts

06R075BU

Littelfuse Inc.In Stock: 120806R075BU Datasheet

Current PartRFQ

RUSBF075

LittelfuseIn Stock: 3724RUSBF075 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The RUSBF075 qualifies as a direct substitute for the 06R075BU based on the following critical parameters:

• Identical voltage rating: 6V maximum
• Identical hold current: 750 mA
• Identical trip current: 1.3 A
• Identical maximum current: 40 A
• Identical time to trip: 400 ms
• Identical post-trip resistance maximum: 230 mOhms
• Identical operating temperature range: -40°C ~ 85°C
• Identical mounting type: Through Hole Radial, Disc
• Identical lead spacing: 0.201" (5.10mm)
• Identical RoHS3 compliance status

The RUSBF075 is manufactured by Littelfuse and carries Active product status, making it suitable for new designs and ongoing procurement.

Parameter Comparison

Engineering Selection Recommendations

The RUSBF075 is the recommended substitute for the obsolete 06R075BU. Both components are manufactured by Littelfuse and share identical electrical and mechanical specifications across all critical parameters. The RUSBF075 carries Active product status, ensuring long-term availability and supply chain continuity.

The RUSBF075 provides enhanced regulatory coverage with CSA, TUV, and UL approvals compared to the 06R075BU's cURus and TUV certifications. The minor dimensional variation in thickness (0.122" versus 0.118") is within typical manufacturing tolerances for radial disc components and does not affect functional compatibility in standard through-hole PCB applications.

Frequently Asked Questions (FAQ)

Q: Can the RUSBF075 be used as a direct replacement for the 06R075BU in existing designs?

A: Yes. The RUSBF075 matches all critical electrical parameters including voltage rating, hold current, trip current, and operating temperature range. The physical dimensions are compatible with standard through-hole radial mounting, and lead spacing is identical at 0.201" (5.10mm).

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

A: The 06R075BU specifies a minimum initial resistance of 100 mOhms, while the RUSBF075 specifies 110 mOhms. Both values fall within acceptable ranges for PTC resettable fuse operation and do not affect circuit protection performance.

Q: Are there packaging differences between the 06R075BU and RUSBF075?

A: The 06R075BU is listed with no specified packaging, while the RUSBF075 is supplied in Bag packaging. This difference applies only to procurement and does not affect the component's electrical or mechanical characteristics.

Q: What regulatory approvals does the RUSBF075 carry?

A: The RUSBF075 is certified by CSA, TUV, and UL. The 06R075BU carries cURus and TUV certifications. Both are ROHS3 compliant.

Q: Is the thickness difference between the two parts significant?

A: The RUSBF075 thickness is 0.122" (3.10mm) compared to the 06R075BU at 0.118" (3.00mm). This 0.004" (0.10mm) difference is within standard manufacturing tolerances for radial disc components and does not impact PCB assembly or functional performance.