Overview
The Vishay Dale HLW-12-R1Z is a 12-watt, 7.5-ohm tubular wirewound resistor engineered for industrial power applications. Each unit features a ceramic core with high-temperature silicon coating, complete welded construction, and axial tinned copperweld leads for solder termination. This box contains 10 resistors, making it ideal for production builds, repairs, or system integration requiring reliable power dissipation components.
Key Features
- Power Rating: 12W continuous (10x overload rating for 5 seconds)
- Resistance Value: 7.5 ohms with ±5% tolerance
- High-Temperature Silicon Coating: Protects against environmental stress and thermal cycling
- Welded Construction: Ensures mechanical durability and stable electrical performance
- Temperature Stability: ±30 ppm/°C coefficient for predictable behavior across operating range
- Dielectric Withstanding Voltage: 1000V AC rated for safety-critical circuits
Technical Specifications
The HLW-12-R1Z combines industrial-grade construction with proven reliability. Operating temperature range spans -55°C to +350°C, supporting applications from cryogenic to high-heat environments. Axial leads measure 1.5 inches (38.1 mm) in length; ceramic body is 1.75 inches (44.45 mm) long with 1.313-inch (7.94 mm) outer diameter. Short-time overload capability of 10x rated power for 5 seconds enables transient protection without failure.
Typical Applications
- Load banks and power dissipation circuits
- Test and measurement equipment with thermal load requirements
- Industrial control systems and servo drive feedback resistors
- Heating element circuits in furnaces and thermal systems
- Current-limiting resistors in high-reliability power supplies
- Motor starting and braking circuits requiring surge handling
Compatibility & Replacements
Compatible With
- Through-hole PCB designs with 0.1-inch standard lead spacing
- Chassis-mounted applications using M3 or M4 hardware
- Standard industrial solder processes (lead-free compatible)
- Equipment requiring MIL-spec or AEC-Q rated components (verify with application)
- Systems using standard power resistor heat sinking
Replaces / Drop-In Replacement For
- Earlier production runs of HLW-12-R1Z from alternate distributors
- Functionally equivalent 12W, 7.5-ohm wirewound resistors with matching lead configuration (verify lead length and termination)
Works With
- Aluminum or copper heat sinks rated for -55 to +350°C
- Standard PCB assembly equipment (wave solder, reflow compatible)
- Industrial test benches and system integration workflows
- Thermal analysis software for derating calculations above 25°C ambient
