# MRP Wirewound Resistors

## Features
️· High temperature coating (> 350 °C)
️· Complete welded construction
️· Non-inductive styles available (Ayrton-Perry winding - “NI” designation)

## Electrical Specifications
️· Power Rating: Varies by model (0.25W to 20.0W) and temperature characteristic (U = +250°C, V = +350°C) - see table for specifics.
️· Resistance Range: 0.1 Ω to 285.0 kΩ
️· Tolerance: ± 0.25 %, ± 0.5 %, ± 1 %, ± 5 %
️· Temperature Coefficient: ± 30 ppm/°C (for 10 Ω and above), ± 50 ppm/°C (1.0 to 9.9 Ω), ± 90 ppm/°C (0.5 to 0.99 Ω)

## Dimensions
️· Dimensions vary by model (see table for Length, L1, Diameter, LD)

## Material Specifications
️· Element: Copper-nickel alloy or nickel-chrome alloy
️· Core: Steatite or alumina ceramic
️· Coating: High temperature silicone
️· Terminals: Tinned copper clad steel
️· End Caps: Stainless steel
️· Marking: MILLS, model, value, tolerance, date code

## Packaging
️· Tape/reel options (E07, E08, E29, E48)
️· Bulk options (E12 - up to 100 pieces)

## Part Numbering
️· Global: MRP[6 digits][5 digits][1 digit][3 digits][up to 2 digits] (Value: R=decimal, K=thousand)
️· Historical: MRP[model][resistance][tolerance]

## Testing Specifications
️· Dielectric Withstanding Voltage: 500 VAC (≤1.2W), 1000 VAC (>1.2W)
️· Operating Temperature: -65 to +250°C (Characteristic U), -65 to +350°C (Characteristic V)
️· Refer to the datasheet for detailed test limits on vibration, temperature exposure, load life, moisture resistance, shock, and overload.

## Disclaimer
️· Product specifications are subject to change.
️· Vishay disclaims liability for errors, inaccuracies, or incomplete information.
️· Products are not intended for use in life-saving or life-sustaining applications without specific authorization.