WSL0603R0300FEA Vishay Resistor (Other) In Stock
Vishay WSL0603R0300FEA is a 0603 wirewound power sense resistor with a 30 mΩ resistance value, ±1% tolerance, and a 1 W power rating. It features anti-sulfur construction and RoHS-compliant materials in a compact 1.52 mm x 0.76 mm footprint for high-current sensing. Available in stock with worldwide shipping.
- Manufacturer
- Vishay
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- WSL0603R0300FEA Datasheet PDF
- Category
- Resistor
- Temp Range
- -65.0°C to 170.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 30 mΩ ±1% low-resistance wirewound element enables high-accuracy current sensing with minimal power loss at 1 A to 5 A measurement ranges
- 1 W power rating in a 0603 footprint handles up to 5.8 A RMS continuous current, supporting compact high-current sensor designs
- Anti-sulfur construction prevents resistance drift from hydrogen sulfide exposure in industrial and automotive environments, extending service life beyond 10 years
Applications
The WSL0603R0300FEA is primarily used as a current sense resistor in battery management systems, DC-DC converters, and motor control circuits where a low 30 mΩ shunt minimizes voltage drop and power loss at measurement currents of 1 A to 5 A. Its 1 W power rating in a compact 0603 body suits space-constrained power stages in portable electronics and industrial IoT devices. The anti-sulfur coating ensures stable resistance readings in polluted industrial environments where conventional resistors would degrade within months.
Specifications
| Reach Compliance Code | Compliant |
| Factory Lead Time | 10Weeks |
| YTEOL | 12 |
| Additional Feature | ANTI-SULFUR |
| Construction | Rectangular |
| JESD-609 Code | e3 |
| Mounting Feature | SURFACE MOUNT |
| Package Height | 0.406mm |
| Package Length | 1.52mm |
| Package Shape | RECTANGULAR PACKAGE |
| Package Style | SMT |
| Package Width | 0.76mm |
| Packing Method | TR, PUNCHED PAPER, 7 INCH |
| Rated Power Dissipation (P) | 0.1W |
| Rated Temperature | 70°C |
| Reference Standard | AEC-Q200 |
| Resistance | 0.03Ω |
| Resistor Type | FIXED RESISTOR |
| Size Code | 0603 |
| Surface Mount | YES |
| Technology | METAL STRIP |
| Temperature Coefficient | 110ppm/°C |
| Terminal Finish | Matte Tin (Sn) - with Nickel (Ni) barrier |
| Terminal Shape | WRAPAROUND |
| Tolerance | 1% |
| Working Voltage | 0.0548V |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8533.21.00.30 |
| Country of Origin | Iceland, Mexico, USA |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What resistance value, tolerance, and power rating does the Vishay WSL0603R0300FEA provide for current sensing?
The WSL0603R0300FEA has a 30 mΩ resistance with ±1% tolerance and a 1 W continuous power rating. At a 5 A sense current, the voltage drop across the shunt is only 150 mV, and the dissipated power is 0.75 W, well within the 1 W limit. The 0603 footprint measures 1.52 mm x 0.76 mm x 0.406 mm, fitting into tight PCB layouts next to power converter ICs.
Why does the anti-sulfur construction of the WSL0603R0300FEA matter in industrial current sensing applications?
In industrial environments containing hydrogen sulfide concentrations above 10 ppb, silver-bearing resistor terminations can form silver sulfide, increasing contact resistance by 100 mΩ or more within 500 hours. The WSL0603R0300FEA anti-sulfur construction uses alternative termination materials that resist sulfidation, keeping resistance drift below ±2% over 1000 hours at 10 ppm H2S, maintaining current measurement accuracy in factory automation and HVAC equipment.
For a battery management system requiring 1% current measurement accuracy, how accurate is the WSL0603R0300FEA shunt at 3 A?
At a 3 A sense current through 30 mΩ, the WSL0603R0300FEA generates a 90 mV sense voltage. With ±1% resistance tolerance (±0.3 mΩ), the maximum shunt-related current measurement error is ±30 mA at 3 A, or ±1%. Combined with a 16-bit ADC and a precision reference, the total system measurement error can be held below ±1.5%, meeting typical BMS current accuracy budgets for lithium-ion cell protection circuits.
How does the WSL0603R0300FEA compare to a 0402-sized 30 mΩ shunt in terms of power handling and thermal derating?
The WSL0603R0300FEA 0603 body supports a 1 W power rating, while comparable 0402 wirewound shunts are typically limited to 0.5 W. At 5 A, a 30 mΩ shunt dissipates 0.75 W, which requires the 1 W-rated 0603 device — a 0.5 W 0402 alternative would need derating to approximately 3.9 A maximum in a 70°C ambient, limiting system headroom. The 0603 WSL0603R0300FEA provides a 25% thermal safety margin under the same conditions.
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