WSL2512R0400FEA: High-Performance 40 mOhm Surface Mount Chip Resistor | Vishay Dale
WSL2512R0400FEA: Premium 40 mOhm Surface Mount Chip Resistor by Vishay Dale
The WSL2512R0400FEA represents the pinnacle of surface mount resistor technology from Vishay Dale, a world-renowned manufacturer of precision electronic components. This high-performance 40 milliohm resistor delivers exceptional accuracy and reliability for demanding applications across automotive, industrial, and power electronics sectors.
In-Depth Technical Specifications
Precision Resistance Characteristics
Engineered for exacting applications, the WSL2512R0400FEA provides:
- Ultra-low resistance: 40 m (0.040 ohms)
- Tight tolerance: 1% for precision current sensing
- Temperature coefficient: 75 ppm/ C for stable performance across temperatures
Robust Power Handling
With its 1W power rating in a compact 2512 package, this resistor outperforms standard components by:
- Handling higher current loads (up to 5A continuous)
- Featuring superior heat dissipation
- Maintaining stability under power surges
Advanced Construction Features
The metal element construction provides:
- Excellent pulse handling (up to 150W for 1 s)
- Low inductance design (<5nH) for high-frequency applications
- Superior thermal management with aluminum nitride substrate
Specialized Performance Features
Automotive-Grade Reliability
As an AEC-Q200 qualified component, it meets stringent requirements for:
- Temperature cycling (-65 C to +170 C)
- Mechanical shock and vibration resistance
- Long-term reliability in harsh environments
Enhanced Environmental Protection
Special features include:
- Anti-sulfur: Special termination plating prevents sulfur-induced corrosion
- Moisture resistant: Withstands 85 C/85% RH conditions
- Flame retardant: Meets UL94 V-0 standards
Detailed Package Information
The 2512 (6432 metric) package offers:
- Compact dimensions: 6.35mm 3.18mm 0.89mm
- Nickel barrier terminations with 100% matte tin plating
- Compatible with automatic pick-and-place assembly
- Excellent solderability for both lead-free and tin-lead processes
Comprehensive Application Guide
Automotive Electronics
- Battery management systems (current sensing)
- Motor control circuits
- LED lighting drivers
- DC/DC converter current limiting
Industrial Applications
- Power supply current monitoring
- Motor drive circuits
- Welding equipment
- Robotics control systems
Consumer Electronics
- Smartphone battery protection
- Gaming console power circuits
- High-end audio amplifiers
Performance Comparison
Compared to standard thick film resistors, the WSL2512R0400FEA offers:
| Parameter | WSL2512R0400FEA | Standard Resistor |
|---|---|---|
| Power Rating | 1W | 0.5W |
| Pulse Handling | 150W (1 s) | 50W (1 s) |
| Temperature Range | -65 C to +170 C | -55 C to +155 C |
| AEC-Q200 Qualified | Yes | No |
Design Considerations
For optimal performance:
- Maintain proper PCB pad dimensions (recommended 3.4mm 2.0mm)
- Use thermal relief patterns for high-current applications
- Implement proper solder paste stencil design (recommend 80% coverage)
- Consider parallel placement for higher power requirements
Frequently Asked Questions
What makes the WSL2512R0400FEA suitable for automotive applications?
The resistor's AEC-Q200 qualification, extended temperature range, and anti-sulfur properties make it ideal for automotive electronics where reliability under harsh conditions is critical.
Can this resistor be used for high-frequency applications?
Yes, with its low inductance design (<5nH), the WSL2512R0400FEA performs well in switching applications up to several MHz.
What is the expected lifespan of this component?
Under normal operating conditions, Vishay Dale rates this resistor for >100,000 hours of operation at full rated power.
Purchasing Information
The WSL2512R0400FEA is available through authorized distributors worldwide. Typical lead times are 6-8 weeks for standard orders, with options for expedited shipping. Volume pricing available for OEM quantities.
Conclusion
The Vishay Dale WSL2512R0400FEA sets the standard for high-performance, precision current sense resistors. Its combination of ultra-low resistance, high power handling, and automotive-grade reliability makes it the ideal choice for engineers designing next-generation power electronics. Whether you're developing advanced automotive systems, industrial controls, or high-efficiency power supplies, this resistor delivers the performance and durability required for mission-critical applications.
For technical support or design assistance with the WSL2512R0400FEA, contact Vishay Dale's application engineering team or visit our authorized distributor network for pricing and availability.