ERJ-L14UF25MU Panasonic Resistor (Other) In Stock
Panasonic ERJ-L14UF25MU is a 0.025 Ohm current-sense thick-film chip resistor in a 1210 (3225 metric) package, rated at 0.33 W (1/5 W) and qualified to AEC-Q200 for automotive applications. This low-resistance current-sense resistor delivers stable performance across automotive temperature ranges with tight tolerance for accurate current measurement. Available in tape-and-reel with worldwide shipping for automotive and industrial volume production.
- Manufacturer
- Panasonic
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- ERJ-L14UF25MU Datasheet PDF
- Category
- Resistor
- Price
- From $0.1040(MOQ 250)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of ERJ-L14UF25MU?
- Ultra-low 0.025 Ohm resistance value optimised for high-accuracy current sensing with minimal power loss in the sense element
- AEC-Q200 automotive qualification ensures proven reliability across harsh automotive operating temperature ranges and vibration environments
- 1210 (3225 metric) package provides a larger thermal footprint for 0.33 W power dissipation compared to smaller 0805 or 0603 sense resistors
- Thick-film current-sense construction delivers stable resistance over temperature with low TCR for consistent measurement accuracy in closed-loop control designs
What is ERJ-L14UF25MU used for?
The ERJ-L14UF25MU is designed for current-sensing applications in automotive electronic control units (ECUs), battery management systems, and DC motor drives where AEC-Q200 qualification and a low 0.025 Ohm resistance value are required for precise in-line current measurement. It is commonly used in electric vehicle on-board chargers, LED headlamp drivers, and 12 V/48 V bus monitoring circuits where the 1210 package provides adequate power handling for continuous currents up to several amperes. The thick-film technology also suits industrial power converters and servo amplifiers that need stable low-resistance current shunts within a standard SMT footprint.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the ERJ-L14UF25MU datasheet?
ERJ-L14UF25MU Datasheet DownloadOfficial datasheet from Panasonic
What are equivalent replacements for ERJ-L14UF25MU?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What resistance value does the ERJ-L14UF25MU provide, and why is this level suitable for automotive current sensing?
The ERJ-L14UF25MU has a resistance value of 0.025 Ohm (25 milliohms). This ultra-low resistance causes minimal voltage drop and power loss across the sense element even at currents of several amperes — for example, at 3 A the sense voltage is only 75 mV — which is well within the input range of standard current-sense amplifiers while keeping I²R dissipation below the 0.33 W rated limit. The AEC-Q200 automotive qualification ensures this resistance stays stable across the full automotive temperature range, preserving measurement accuracy in ECUs and battery management systems.
What does the AEC-Q200 qualification of the ERJ-L14UF25MU mean for an automotive design team?
AEC-Q200 is the automotive component stress test qualification standard for passive components published by the Automotive Electronics Council. For the ERJ-L14UF25MU, it means the resistor has passed a defined test suite including thermal shock, moisture resistance, and mechanical vibration tests that simulate the demanding environment inside a vehicle from -40°C to +125°C or beyond. Design teams using AEC-Q200 qualified components in IATF 16949 production processes can include the ERJ-L14UF25MU in automotive BOMs without additional component-level qualification testing, shortening the vehicle programme approval timeline.
How does the 1210 package of the ERJ-L14UF25MU compare to smaller sense resistor packages for thermal management?
The 1210 package (3.2 mm x 2.5 mm) provides a larger PCB footprint and more solderable pad area than 0805 (2.0 mm x 1.25 mm) or 0603 (1.6 mm x 0.8 mm) alternatives, allowing more heat to spread into the PCB copper pour through the solder joints. At the rated 0.33 W dissipation with 0.025 Ohm resistance, the 1210 body maintains a lower surface temperature than an equivalent-rated smaller package, which is important in automotive under-hood environments where ambient temperatures can reach 85°C to 105°C and thermal margins are tight.
For a 48 V mild-hybrid vehicle battery monitoring application, at what maximum continuous current can the ERJ-L14UF25MU operate within its 0.33 W power rating?
At 0.025 Ohm resistance and a 0.33 W power rating, the maximum continuous current is calculated from P = I²R, giving I = sqrt(0.33 / 0.025) which equals approximately 3.6 A continuous. In a 48 V mild-hybrid battery monitoring application, a 3.6 A sense current is suitable for monitoring auxiliary loads or low-power charging circuits, but main traction current paths that carry tens of amperes would require a lower-resistance shunt or a higher-wattage variant. Designers should also derate the power rating by 50% at the expected PCB operating temperature to maintain long-term reliability per Panasonic derating guidelines.
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About Panasonic
Panasonic is a leading electronic component manufacturer. FindMyChip sources Panasonic ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 250+ | $0.1945 | $48.63 |
| 500+ | $0.1761 | $88.03 |
| 602+ | $0.1040 | $62.61 |
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