HVR250P145CF Equivalent & Substitute Parts

Part Overview

The HVR250P145CF is a Polymeric PTC Resettable Fuse manufactured by Littelfuse, part of the POLY-FUSE® HVR250 series. This component is rated for 60V maximum voltage with a 145 mA hold current and is designed for through-hole radial mounting in disc configuration. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

HVR250P145CF

LittelfuseIn Stock: 844HVR250P145CF Datasheet

Current PartRFQ

250R145ZR

Littelfuse Inc.In Stock: 3552250R145ZR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HVR250P145CF is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Voltage rating: 60V (250V Int) maximum
• Hold current (Ih): 145 mA maximum
• Trip current (It): 290 mA
• Maximum current capacity: 3 A
• Time to trip: 2.5 s
• Initial resistance (Ri): 3 Ohms minimum
• Post-trip resistance (R1): 14 Ohms maximum
• Operating temperature range: -40°C ~ 85°C

Mechanical Equivalence Criteria:

• Mounting type: Through Hole
• Package configuration: Radial, Disc
• Lead spacing and physical dimensions compatible with PCB footprints designed for HVR250P145CF

Compliance Criteria:

• Approval agencies: cURus and TUV certification required
• RoHS3 compliance mandatory

The substitute part 250R145ZR meets all electrical specifications and maintains full compliance with regulatory requirements while offering improved availability as an active product.

Parameter Comparison

Engineering Selection Recommendations

The 250R145ZR is a direct functional equivalent to the HVR250P145CF across all critical electrical and mechanical parameters. The primary distinction is product status: HVR250P145CF is obsolete while 250R145ZR is an active product with current manufacturing support.

Both components carry identical regulatory certifications (cURus, TUV) and maintain ROHS3 compliance. The 250R145ZR is available in Cut Tape (CT) packaging with significantly higher inventory availability (3541 Pcs vs. 823 Pcs for the original part).

For new designs and ongoing system support where HVR250P145CF availability is constrained, the 250R145ZR provides equivalent electrical performance and mechanical compatibility with the advantage of active product status and improved supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can 250R145ZR be used as a direct replacement for HVR250P145CF in existing designs?

A: Yes. Both components are Littelfuse Polymeric PTC Resettable Fuses with identical electrical ratings (60V, 145 mA hold current, 290 mA trip current), identical time-to-trip characteristics (2.5 s), and equivalent resistance specifications. Both are through-hole radial disc packages with matching approval certifications and RoHS3 compliance.

Q: Are there physical dimension differences between these parts?

A: Minor dimensional variations exist. HVR250P145CF measures 0.236" Dia x 0.201" T (6.00mm x 5.10mm) with 0.492" seated height and 0.217" lead spacing. The 250R145ZR measures 0.256" L x 0.181" W (6.50mm x 4.60mm) with 0.433" seated height and 0.201" lead spacing. These differences are within typical PCB footprint tolerances for radial disc components, but physical board layout should be verified for space-constrained applications.

Q: What is the difference in packaging between these parts?

A: HVR250P145CF is supplied in standard packaging, while 250R145ZR is available in Cut Tape (CT) format. Both are through-hole components suitable for manual or automated assembly. Cut Tape packaging is standard for high-volume production environments.

Q: Why is HVR250P145CF listed as obsolete?

A: Product obsolescence typically reflects manufacturing discontinuation by the supplier. The 250R145ZR represents the current active equivalent in the Littelfuse POLY-FUSE® portfolio, ensuring continued availability and manufacturing support.

Q: Are both parts certified for the same applications?

A: Yes. Both components carry identical regulatory approvals (cURus, TUV) and maintain ROHS3 compliance, making them suitable for equivalent application environments and regulatory jurisdictions.