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LVC25FR075EV Equivalent & Substitute Parts
Part Overview
The LVC25FR075EV is a 75 mOhm ±1% 1W chip resistor in 2512 (6432 Metric) package manufactured by Ohmite. This current sense thick film resistor is designed for precision low-resistance applications requiring moisture resistance and tight tolerance specifications. The part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resistance | 75 mOhms (0.075 Ohm) |
| Tolerance | ±1% |
| Power Rating | 1W |
| Package / Case | 2512 (6432 Metric) |
| Composition | Thick Film |
| Temperature Coefficient | ±100 ppm/°C |
| Operating Temperature Range | -40°C to 125°C |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the LVC25FR075EV is based on the following critical parameters that must remain constant or compatible:
- Resistance Value: 75 mOhms ±1% tolerance
- Package Type: 2512 (6432 Metric) form factor
- Composition: Thick film construction
- Temperature Coefficient: ±100 ppm/°C
- Compliance: ROHS3 Compliant, EAR99 classification
- Moisture Sensitivity: MSL 1 (Unlimited)
The substitute part CRM2512-FX-R075ELF from Bourns Inc. meets all critical substitution criteria. While the substitute offers higher power rating (2W versus 1W) and extended operating temperature range (-55°C to 155°C versus -40°C to 125°C), these represent improvements that maintain full backward compatibility with the original specification.
Parameter Comparison
| Parameter | LVC25FR075EV (Ohmite) | CRM2512-FX-R075ELF (Bourns) | Compatibility |
|---|---|---|---|
| Resistance | 75 mOhms | 75 mOhms | Identical |
| Tolerance | ±1% | ±1% | Identical |
| Power Rating | 1W | 2W | Compatible (higher rating) |
| Package / Case | 2512 (6432 Metric) | 2512 (6432 Metric) | Identical |
| Composition | Thick Film | Thick Film | Identical |
| Temperature Coefficient | ±100 ppm/°C | ±100 ppm/°C | Identical |
| Operating Temperature | -40°C to 125°C | -55°C to 155°C | Compatible (extended range) |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | Identical |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) | Identical |
| Product Status | Obsolete | Active | Substitute is active |
Engineering Selection Recommendations
The CRM2512-FX-R075ELF is the direct substitute for the obsolete LVC25FR075EV. Selection is based on the following engineering criteria:
Electrical Equivalence: Both parts maintain identical resistance value (75 mOhms), tolerance (±1%), and temperature coefficient (±100 ppm/°C), ensuring equivalent circuit performance in current sense applications.
Package Compatibility: Both parts use the 2512 (6432 Metric) package with identical footprints, enabling direct PCB layout compatibility without redesign.
Compliance and Certification: Both parts are ROHS3 compliant with EAR99 classification and MSL 1 rating, meeting regulatory and environmental requirements.
Product Status: The substitute part is active and in production, ensuring long-term availability and supply chain stability compared to the obsolete original part.
Enhanced Specifications: The substitute offers higher power dissipation capability (2W versus 1W) and extended operating temperature range (-55°C to 155°C versus -40°C to 125°C), providing design margin without compromising the original specification.
Frequently Asked Questions (FAQ)
Q: Can the CRM2512-FX-R075ELF be used as a direct replacement for the LVC25FR075EV?
A: Yes. Both parts share identical resistance value, tolerance, temperature coefficient, package type, and compliance certifications. The substitute is electrically and mechanically equivalent for all current sense applications.
Q: What is the difference in power rating between these parts?
A: The LVC25FR075EV is rated at 1W, while the CRM2512-FX-R075ELF is rated at 2W. The higher power rating of the substitute provides additional thermal margin and does not affect compatibility with circuits designed for the original 1W part.
Q: Are the physical dimensions identical?
A: Both parts use the 2512 (6432 Metric) package. Minor dimensional variations exist (LVC25FR075EV: 0.250" L x 0.130" W; CRM2512-FX-R075ELF: 0.248" L x 0.122" W), but these differences are within standard package tolerances and do not affect PCB footprint compatibility.
Q: Does the extended operating temperature range of the substitute affect circuit design?
A: No. The substitute's operating range (-55°C to 155°C) encompasses the original part's range (-40°C to 125°C). Circuits designed for the original specification remain fully compatible.
Q: Are both parts RoHS compliant?
A: Yes. Both the LVC25FR075EV and CRM2512-FX-R075ELF are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.
Q: What is the packaging format of the substitute?
A: The CRM2512-FX-R075ELF is supplied in Tape & Reel (TR) format, which is standard for production environments and automated assembly processes.
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