Specifications:
The document outlines various power ratings for WX Ceramic Vitreous Enamelled Rheostats, ranging from 12.5W to 500W. Dimensions are provided in millimeters for different power ratings, with specific measurements for parameters such as A, B, C, D, E, Φd, f, Φd1, and Φd2. The rheostats can be configured in series with combinations like 50W*2, 100W*2, up to 500W*3.

Features and Construction:
Key features include high power and stable resistance, with options for more shaft lengths and shapes. The construction involves components like a fix position, movable screw, base, ally wire, insulation coating, insulation terminal, fastener, terminal block, and electric brush.

Ordering Information:
The ordering process follows the JIS C 5201-1 standards, with series name (WX), power rating (e.g., 50W, 100W), resistance tolerance (J=±5%, K=±10%), and resistance value (e.g., 100R0=100Ω).

Performance:
The rheostats are tested for rated power, thermal cycles, vibration, temperature cycling, moisture, load wear-resistance, collision, and centrifugal forces. They operate within a temperature range of -55℃ to +300℃ and have specific resistance change limits under various conditions.

Electrical Characteristics:
The nominal resistance range is 2.2~8.2KΩ with a tolerance of ±10%. Terminal resistance is ≤0.2% or 0.1Ω, insulation resistance is R1≥1GΩ (500Vdc), and insulation voltage is 1000Vac. The maximum heating temperature is 300℃.

Physical Characteristics:
The total mechanical travel is 280℃±10℃, with a starting torque of ≤0.15N.m. Standard packaging includes 10 pieces per box.