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LVR075S-2 Equivalent & Substitute Parts
Part Overview
The LVR075S-2 is a polymeric PTC resettable fuse manufactured by Littelfuse Inc. in the PolySwitch® LVR series. This component is rated for 240V (265V internal) with a 750 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 necessary for ongoing system support and new design implementations.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Voltage - Max | 240V (265V Int) |
| Current - Hold (Ih) (Max) | 750 mA |
| Current - Trip (It) | 1.5 A |
| Current - Max | 7.5 A |
| Time to Trip | 18 s |
| Operating Temperature | -20°C ~ 85°C |
| Mounting Type | Through Hole |
| Package / Case | Radial, Disc |
| Lead Spacing | 0.200" (5.08mm) |
Substitute Part Grouping Explanation
Substitution eligibility for the LVR075S-2 is determined by the following critical parameters:
- Voltage rating: 240V (265V internal) maximum
- Current hold specification: 750 mA
- Current trip specification: 1.5 A
- Mounting configuration: Through hole radial disc
- Operating temperature range: -20°C to 85°C
- Time to trip characteristic: 18 seconds
The LVR075S-240-2 qualifies as a direct substitute based on matching all electrical performance specifications and mounting requirements. Both components are polymeric PTC resettable fuses within the PolySwitch® LVR series with identical voltage, current, and thermal characteristics.
Parameter Comparison
| Parameter | LVR075S-2 (Main) | LVR075S-240-2 (Substitute) |
|---|---|---|
| Manufacturer | Littelfuse Inc. | Littelfuse Inc. |
| Series | PolySwitch® LVR | PolySwitch® LVR |
| Type | Polymeric | Polymeric |
| Voltage - Max | 240V (265V Int) | 240V (265V Int) |
| Current - Hold (Ih) (Max) | 750 mA | 750 mA |
| Current - Trip (It) | 1.5 A | 1.5 A |
| Current - Max | 7.5 A | 7.5 A |
| Time to Trip | 18 s | 18 s |
| Operating Temperature | -20°C ~ 85°C | -20°C ~ 85°C |
| Mounting Type | Through Hole | Through Hole |
| Package / Case | Radial, Disc | Radial, Disc |
| Size / Dimension | 0.450" L x 0.189" W (11.43mm x 4.80mm) | 0.450" L x 0.189" W (11.43mm x 4.80mm) |
| Height - Seated (Max) | 0.921" (23.40mm) | 0.921" (23.40mm) |
| Lead Spacing | 0.200" (5.08mm) | 0.236" (6.00mm) |
| Product Status | Obsolete | Active |
| RoHS Status | ROHS3 Compliant | RoHS Compliant |
| Approval Agency | CQC, CSA, TUV, UL | CSA, TUV, UL |
Engineering Selection Recommendations
The LVR075S-240-2 is the direct substitute for the obsolete LVR075S-2. Both components share identical electrical specifications, thermal ratings, and mechanical form factors. The LVR075S-240-2 is currently in active production status with full availability.
The lead spacing differs between the two parts: the LVR075S-2 has 0.200" (5.08mm) spacing while the LVR075S-240-2 has 0.236" (6.00mm) spacing. This difference requires PCB layout verification to ensure compatibility with existing through-hole pad patterns.
Both components carry CSA, TUV, and UL certifications. The LVR075S-2 includes additional CQC approval. The LVR075S-240-2 carries RoHS compliance certification suitable for current regulatory requirements.
Frequently Asked Questions (FAQ)
Q: Can the LVR075S-240-2 directly replace the LVR075S-2 in existing designs?
A: Electrical and thermal specifications are identical. PCB layout compatibility must be confirmed due to the 0.036" (0.92mm) difference in lead spacing between the two parts.
Q: What is the significance of the lead spacing difference?
A: The LVR075S-2 uses 0.200" (5.08mm) lead spacing while the LVR075S-240-2 uses 0.236" (6.00mm) spacing. Existing PCB designs must accommodate this dimensional change for successful component placement.
Q: Are the electrical performance characteristics identical?
A: Yes. Both components have matching voltage ratings (240V/265V internal), current hold (750 mA), current trip (1.5 A), and time to trip (18 seconds) specifications.
Q: What certifications apply to the substitute part?
A: The LVR075S-240-2 carries CSA, TUV, and UL approvals with RoHS compliance certification.
Q: Why is the LVR075S-2 listed as obsolete?
A: The LVR075S-2 is no longer in active production. The LVR075S-240-2 represents the current production equivalent within the PolySwitch® LVR series.
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