WSL10203L000FEA Vishay In Stock
WSL10203L000FEA is a 3 mΩ, 3 W anti-sulfur current sense resistor by Vishay in a 1020 SMT package. Key specs: 0.003 Ω resistance, 3 W power rating, ±1% tolerance, 0.635 mm height. From stock with worldwide shipping.
- Manufacturer
- Vishay
- Package
- —
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- WSL10203L000FEA Datasheet PDF
- Temp Range
- -65.0°C to 170.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Ultra-low 3 mΩ (0.003 Ω) resistance enables high-current sensing with minimal power loss in power management circuits
- Anti-sulfur construction prevents sulfide corrosion on contact surfaces, extending service life in harsh or industrial environments
- Compact 1020 SMT package (2.54 mm × 1.27 mm footprint, 0.635 mm height) supports automated surface mount assembly with tight board spacing
Applications
The WSL10203L000FEA is used as a precision current sensing element in battery management systems, DC-DC converters, and motor drive circuits where ultra-low resistance minimizes power dissipation at high currents. Its anti-sulfur construction makes it reliable in industrial automation, automotive-adjacent, and outdoor electronic equipment exposed to sulfur-containing atmospheres. The 1020 SMT footprint also fits power supply monitoring and overcurrent protection circuits on densely packed PCBs.
Specifications
| Reach Compliance Code | Compliant |
| Factory Lead Time | 10Weeks |
| YTEOL | 10 |
| Additional Feature | ANTI-SULFUR |
| Construction | Rectangular |
| JESD-609 Code | e3 |
| Mounting Feature | SURFACE MOUNT |
| Package Height | 0.635mm |
| Package Length | 2.54mm |
| Package Style | SMT |
| Package Width | 5.08mm |
| Packing Method | TR, Embossed Plastic, 7 Inch |
| Rated Power Dissipation (P) | 2W |
| Rated Temperature | 70°C |
| Reference Standard | AEC-Q200 |
| Resistance | 0.003Ω |
| Resistor Type | FIXED RESISTOR |
| Size Code | 1020 |
| Surface Mount | YES |
| Technology | METAL STRIP |
| Temperature Coefficient | -10,100 ppm/°C |
| Terminal Finish | Matte Tin (Sn) - with Nickel (Ni) barrier |
| Terminal Shape | WRAPAROUND |
| Tolerance | 1% |
| Working Voltage | 0.0775V |
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 and power rating does the WSL10203L000FEA provide for current sensing?
The WSL10203L000FEA has a resistance of 3 mΩ (0.003 Ω) and a power rating of 3 W, making it suitable for sensing currents up to several tens of amperes with minimal burden voltage and low self-heating in power electronics circuits.
Why does the WSL10203L000FEA include anti-sulfur construction and where is it most valuable?
The anti-sulfur construction prevents silver-sulfide formation on the resistor's contact pads, which can increase resistance or cause open-circuit failures in sulfur-rich environments. This is most valuable in industrial automation, HVAC systems, and outdoor telecom equipment where sulfur contamination from rubber, air pollutants, or industrial gases is a known reliability risk.
What SMT package dimensions does the WSL10203L000FEA use and how does it affect PCB layout?
The WSL10203L000FEA uses a 1020 SMT package measuring 2.54 mm in length and 1.27 mm in width, with a profile height of only 0.635 mm. This compact footprint allows placement in tight PCB layouts and is compatible with standard SMT pick-and-place and reflow soldering processes.
Which current sensing topologies are best matched to the WSL10203L000FEA's 3 mΩ resistance?
The 3 mΩ resistance is well matched to low-side and high-side current sensing topologies in battery pack monitors, synchronous buck regulators, and motor controllers carrying 10 A to 50 A, where a sense voltage of 30 mV to 150 mV is generated without exceeding the 3 W power dissipation limit.
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