WSR5R1000FEA Vishay Resistor (Resistor Moulded) In Stock
The Vishay WSR5R1000FEA is a 0.1 Ω surface-mount wirewound current sense resistor in a large SMT package (11.56 mm x 2.41 mm height) rated at 5 W power dissipation, featuring anti-sulfur construction for enhanced reliability in harsh environments. It provides accurate and stable low-resistance current sensing across industrial, automotive, and power supply applications. REACH-compliant and RoHS-conformant, this resistor ships with a 5-week lead time.
- Manufacturer
- Vishay
- Package
- Resistor Moulded
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- WSR5R1000FEA Datasheet PDF
- Category
- Resistor
- Temp Range
- -65.0°C to 275.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 0.1 Ω resistance at 5 W power rating enables accurate high-current sensing with minimal voltage drop in power stages
- Anti-sulfur construction prevents contact degradation in industrial and automotive environments with airborne sulfur contamination
- Large SMT package (11.56 mm x 2.41 mm) provides superior thermal dissipation and stable resistance under continuous load
Applications
The Vishay WSR5R1000FEA is used as a low-value current sense element in motor controllers, power converters, and battery management systems where accurate measurement of 10 A to 50 A load currents is required with minimal power loss. Its 5 W rating and large package footprint allow continuous operation without derating in ambient temperatures up to 70 °C. The anti-sulfur feature makes it reliable for outdoor power equipment, automotive charging stations, and industrial control panels exposed to harsh atmospheric conditions.
Specifications
| Reach Compliance Code | Compliant |
| Factory Lead Time | 5Weeks |
| YTEOL | 10 |
| Additional Feature | ANTI-SULFUR |
| Construction | Rectangular |
| JESD-609 Code | e2 |
| Mounting Feature | SURFACE MOUNT |
| Package Height | 2.41mm |
| Package Length | 11.56mm |
| Package Style | SMT |
| Package Width | 6.98mm |
| Packing Method | TR, EMBOSSED PLASTIC, 13 INCH |
| Rated Power Dissipation (P) | 5W |
| Rated Temperature | 70°C |
| Reference Standard | AEC-Q200 |
| Resistance | 0.1Ω |
| Resistor Type | FIXED RESISTOR |
| Size Code | 4527 |
| Surface Mount | YES |
| Technology | METAL STRIP |
| Temperature Coefficient | 75ppm/°C |
| Terminal Finish | TIN SILVER |
| Terminal Shape | WRAPAROUND |
| Tolerance | 1% |
| Working Voltage | 0.71V |
| Package | Resistor Moulded |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8533.21.00.30 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the WSR5R1000FEA's 0.1 Ω resistance support current sensing at high load currents?
At 0.1 Ω, the WSR5R1000FEA generates a sense voltage of 1 V per 10 A of load current, which is within the input range of most current sense amplifiers. For a 20 A motor drive application, the sense voltage is 2 V, providing a strong signal-to-noise ratio while dissipating only 4 W of power — within the 5 W rating. This makes it ideal for closed-loop current control in servo drives and power converters.
Why does the WSR5R1000FEA include anti-sulfur construction, and where is this feature critical?
Anti-sulfur construction uses silver-free or sealed termination materials that resist corrosion from hydrogen sulfide (H2S) and sulfur dioxide (SO2) present in industrial, automotive, and coastal environments. Without this protection, silver-containing terminations can form silver sulfide, increasing contact resistance by 10 Ω or more over time and causing circuit failures. The WSR5R1000FEA's anti-sulfur design ensures stable 0.1 Ω resistance over its service life in such environments.
What power dissipation capability does the WSR5R1000FEA offer, and how does its package size support thermal management?
The WSR5R1000FEA is rated at 5 W continuous power dissipation, supported by its large 11.56 mm x 2.41 mm SMT package footprint. The large body area provides improved thermal coupling to the PCB copper plane, reducing junction-to-board thermal resistance and allowing the resistor to operate continuously at full rated power without exceeding its maximum temperature rating of 170 °C, provided adequate copper pour area is used on the PCB.
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About Vishay
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