Specifications:
The document outlines the specifications for Ohmite's 50 Series economical silicone coated wirewound power resistors. These resistors are available in two series: 53J and 55J, with power ratings of 3W and 5W respectively. The resistance range for 53J is 0.1Ω to 10KΩ, and for 55J is 0.1Ω to 20KΩ. The limiting element voltage is 150V for 53J and 200V for 55J.

Test Conditions and Performance:
- Short term overload: 5X rated power for 5 seconds for 3W and 10X for 5 seconds for 5W, with a maximum resistance change of <2% + 0.05Ω.
- Load life at rated power: 1000 hours with a cycle of 1.5 hours ON and 0.5 hours OFF, with a maximum resistance change of <5% + 0.05Ω.
- Robustness of termination: As per BS-CECC 40201-002, with a maximum resistance change of <1% + 0.05Ω.
- Temperature Coefficient of Resistance: ±90 ppm/°C for below 1.0Ω, ±50 ppm/°C for 1.0Ω to 99Ω, and ±30 ppm/°C for 100Ω and above.

Features:
The resistors feature rugged construction, are optimized for medium to high volume production, and can be customized for specific resistance values. They have an all-welded construction with a high purity alumina ceramic core and high-quality RoHS grade tinned copper wire.

Color Code:
The document provides a four-band color code for identifying resistance values, with specific colors representing digits, multipliers, and tolerances.

Dimensions and Ordering Information:
The dimensions for the 53J and 55J series are provided, with specific details on maximum diameter and nominal lead length. The ordering information includes options for tolerance, RoHS compliance, wattage, non-inductive winding, tape and reel packaging, and modified lead length.

Standard Part Numbers:
A list of standard part numbers for both 53J and 55J series is provided, indicating the resistance values available.