LVR075S Polymeric PTC Resettable Fuse - Equivalent & Substitute Parts

Part Overview

The LVR075S is a polymeric PTC resettable fuse manufactured by Littelfuse Inc., designed for overcurrent protection in 240V applications with a 750 mA hold current rating. This component operates as a self-resetting protective device, automatically interrupting circuit flow when current exceeds trip thresholds and restoring functionality once the fault condition is cleared.

The LVR075S carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

LVR075S

Littelfuse Inc.In Stock: 1165LVR075S Datasheet

Current PartRFQ

LVR075S-240

Littelfuse Inc.In Stock: 5025LVR075S-240 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LVR075S is determined by strict equivalence across the following critical parameters:

• Voltage Rating: Maximum voltage must equal or exceed 240V (265V Int)
• Current - Hold (Ih): Must match 750 mA specification
• Current - Trip (It): Must match 1.5 A specification
• Current - Max: Must match 7.5 A specification
• Time to Trip: Must match 18 s specification
• Resistance - Initial (Ri): Must match 316 mOhms (minimum)
• Resistance - Post Trip (R1): Must match 839 mOhms (maximum)
• Operating Temperature Range: Must support -20°C ~ 85°C
• Mounting Type: Must be Through Hole
• Package / Case: Must be Radial, Disc configuration
• Physical Dimensions: Lead spacing 0.200" (5.08mm) and form factor must be compatible
• Approval Certifications: Must maintain CQC, CSA, TUV, UL compliance

The LVR075S-240 qualifies as a direct substitute based on complete parameter alignment across all electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The LVR075S-240 is the qualified substitute for the obsolete LVR075S. Both components are manufactured by Littelfuse Inc. within the PolySwitch® LVR series and maintain identical electrical and mechanical specifications across all critical parameters.

The LVR075S-240 carries Active product status, ensuring ongoing availability and supply chain support. Both components hold equivalent regulatory certifications (CQC, CSA, TUV, UL) and maintain ROHS3 compliance, satisfying environmental and safety requirements for equivalent applications.

The primary distinction between the two part numbers is packaging configuration: the LVR075S is supplied in standard packaging, while the LVR075S-240 is available in Bulk packaging. This difference does not affect component performance, electrical characteristics, or mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can LVR075S-240 be used as a direct replacement for LVR075S?

A: Yes. The LVR075S-240 is a direct substitute. All electrical parameters (voltage, current ratings, resistance values, trip time) and mechanical specifications (dimensions, lead spacing, mounting type) are identical. The components are functionally equivalent for circuit design and PCB layout purposes.

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

A: The primary difference is product status and packaging. The LVR075S is Obsolete, while LVR075S-240 is Active. The LVR075S-240 is supplied in Bulk packaging. Electrical and mechanical specifications are identical.

Q: Are there any compliance or certification differences?

A: No. Both components maintain identical regulatory approvals (CQC, CSA, TUV, UL) and ROHS3 compliance status. They satisfy equivalent environmental and safety requirements.

Q: Will the LVR075S-240 fit the same PCB footprint as the LVR075S?

A: Yes. Both components feature identical physical dimensions (0.450" L x 0.189" W), lead spacing (0.200"), and radial disc package configuration. PCB layout and mounting requirements are unchanged.

Q: What is the operating temperature range for these components?

A: Both the LVR075S and LVR075S-240 operate across -20°C to 85°C. This range applies to all electrical and mechanical specifications.

Q: Are there inventory considerations when selecting between these parts?

A: The LVR075S is Obsolete with limited inventory (1077 Pcs). The LVR075S-240 is Active with higher availability (4999 Pcs). For new designs or ongoing production, the LVR075S-240 is the recommended selection to ensure supply continuity.