LVR075S-1 PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The LVR075S-1 is a polymeric PTC resettable fuse manufactured by Littelfuse Inc., rated for 240V (265V internal) with a 750 mA hold current. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system support and component procurement. The part is designed for through-hole radial mounting in protective circuit applications requiring automatic reset functionality after fault conditions are cleared.

Substiute Parts

LVR075S-1

Littelfuse Inc.In Stock: 2458LVR075S-1 Datasheet

Current PartRFQ

LVR075S-240-1

Littelfuse Inc.In Stock: 849LVR075S-240-1 Datasheet

DirectRFQ

LVR075S-240

Littelfuse Inc.In Stock: 5025LVR075S-240 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LVR075S-1 are qualified based on strict electrical and mechanical parameter matching within the PolySwitch® LVR series. The substitution criteria are:

Electrical Parameters (Critical):

• Voltage rating: 240V (265V internal) maximum
• Current hold (Ih): 750 mA maximum
• Current trip (It): 1.5 A
• Current maximum: 7.5 A
• Time to trip: 18 seconds
• Initial resistance (Ri): 316 mOhms minimum
• Post-trip resistance (R1): 839 mOhms maximum
• Operating temperature range: -20°C to 85°C

Mechanical Parameters (Critical):

• Mounting type: Through hole radial
• Package case: Radial disc configuration
• Physical dimensions: 0.450" L x 0.189" W (11.43mm x 4.80mm)
• Height seated: 0.921" (23.40mm) maximum
• Lead spacing: 0.200" (5.08mm)

Compliance Parameters:

• Approval agencies: CQC, CSA, TUV, UL certification
• RoHS compliance: ROHS3 compliant

Parameter Comparison

Engineering Selection Recommendations

LVR075S-240-1 (Direct Manufacturer Substitute): This part is the direct successor designation from Littelfuse Inc. with active product status. It maintains the 240V and 750 mA specifications required for the LVR075S-1 application. The part carries RoHS compliance certification and has 800 units in current inventory. Selection of this part is appropriate for applications requiring direct form-fit-function replacement with active manufacturer support.

LVR075S-240 (Parametric Equivalent): This part provides complete electrical and mechanical parameter equivalence to the LVR075S-1, including all critical specifications: 240V (265V internal) voltage rating, 750 mA hold current, 1.5 A trip current, 18-second trip time, and identical physical dimensions. The part is manufactured by Littelfuse Inc. in the PolySwitch® LVR series with active product status and ROHS3 compliance. It carries the same regulatory approvals (CQC, CSA, TUV, UL) and has 4999 units in inventory. This part is suitable for direct substitution in all applications where the LVR075S-1 was originally specified.

Both substitute parts are manufactured by the original equipment manufacturer and maintain full compliance with the regulatory and environmental standards of the obsolete LVR075S-1.

Frequently Asked Questions (FAQ)

Q: Can LVR075S-240-1 and LVR075S-240 be used interchangeably with LVR075S-1?

A: Both parts meet the electrical and mechanical requirements of the LVR075S-1. The LVR075S-240 provides complete parametric documentation matching all specifications. The LVR075S-240-1 is the direct manufacturer designation update. Both are suitable for direct substitution based on the provided specifications.

Q: What is the difference between LVR075S-240-1 and LVR075S-240?

A: LVR075S-240-1 is designated as a direct manufacturer part with active status. LVR075S-240 is the parametric equivalent with complete electrical and mechanical specification documentation. Both maintain 240V and 750 mA ratings. The LVR075S-240 has higher inventory availability (4999 units versus 800 units).

Q: Are the physical dimensions identical across all three parts?

A: The LVR075S-1 and LVR075S-240 share identical physical dimensions: 0.450" L x 0.189" W (11.43mm x 4.80mm) with 0.921" (23.40mm) maximum seated height and 0.200" (5.08mm) lead spacing. Physical dimensions for LVR075S-240-1 are not provided in the specification data.

Q: Do all substitute parts carry the same regulatory approvals?

A: The LVR075S-1 and LVR075S-240 both carry CQC, CSA, TUV, and UL approvals. Regulatory approval information for LVR075S-240-1 is not provided in the available specification data.

Q: What is the RoHS compliance status of each part?

A: LVR075S-1 and LVR075S-240 are ROHS3 compliant. LVR075S-240-1 is RoHS compliant. Both designations indicate compliance with RoHS environmental standards.

Q: Which substitute part should be selected for new designs?

A: Selection between LVR075S-240-1 and LVR075S-240 depends on procurement requirements and inventory availability. Both parts are active products from Littelfuse Inc. The LVR075S-240 has complete parametric documentation and higher inventory levels. The LVR075S-240-1 is the direct manufacturer designation update.