Flat Mica Resistor (ASM) Introduction
Token has introduced a new line of high-power, high-current mica flat resistors (ASM) in standard planar bank sizes. Offering designers a lower cost option to the standard space-saving design, Token (ASM) compact mica resistors feature flat wirewound technology for improvements in low electric current loss, excellent thermal stability, and power capacity, while maintaining the same package size.
The (ASM) resistor is compact in structure, and the resistance wire is wound on the mica substrate, and both sides are insulated with mica sheets. To ensure symmetrical expansion of the resistor and maximum stability to high load pulses, the device is packaged in a thin metal alloy case made of aluminum and zinc. For the resistance winding, we use a high quality strip wires composed of CuNi, NiCr, or CrAl alloy. This ensures that even the resistor element reaches its maximum pulse load.
Due to its low profile, the (ASM) mica power resistor can be easily mounted on the back side of a Voltage to Frequency Converter (VFC). In particular, the (ASM) is fitting extremely well into the given space as an internal braking resistor and a series resistor for current limiting when charging the intermediate circuit capacitor of the frequency converter. Further application as load banks, dynamic braking, and motor control, or protective resistor. The nominal load can be improved by forced air cooling or by mounting the resistors on a heat sink.
The (ASM) flat mica resistor features with power handling capability of 100W to 400W and wide resistance range 1Ω to 10KΩ with Temperature Coefficients TCR ±260ppm/°C. The devices offer operating temperature form -55°C to +275°C with precision tolerance of ±5% and ±10% and conform to the RoHS directives and Lead-free.
To assist with your specifying power load and braking applications, please contact Token Electronics. For each load case, a thermal simulation can be calculated to determine the suitability of a given application. Customed design are also available on request.
Downloads Complete Specification in PDF Power Wirewound Flat Mica Resistors (ASM).
- Excellent high temperature load performance, low electric current loss, excellent mechanical strength.
- Perfect insulation, high dielectric strength, low moisture absorption, excellent Thermal stability.
- Product is flat, thin and with small size and, Cost-Effective.
- Heat sink must be installed as required when it’s used.
- Applied for functional power supply, Electric power distribution, load test, Variable frequency power source etc.
- Applied for driving and braking part of the industrial control system.
