Nanjing Shiheng Electronics Co. Ltd

Model Number: MF72-200D5 Brand Name: Shiheng Key Specifications/Special Features: Main techno-parameterPart number: MF72-200D5Rated resistance R25: 200Ω ±20%B-value (25/50℃): 3200K ±10%Maximum steady state current: 0.1A

Approximate resistance of maximum current: 6.259Ω

Dissipation coefficient: 6mW/℃

Thermal time constant: 18s

Operating temperature: -40 to+150℃

Recognition: CQC/RoHS Directive-compliant/ISO 9001:2000/ISO 14001:2004

Recommended applications:

• Conversion power supply, switch power, kinds of electric heater, electronic energy-saving lamps, electronic ballast
• All kinds of power circuit protection of electronic equipments, filament protection of all kinds of RT, bulb and other lighting lamps

Characteristics:

• Small size,strong power and strong capability of surge current protection
• Fast response to surge current
• Big material constant (B value), small remain resistance
• Longevity of service, high reliability
• Integral series, extensive operating range

Introduction:

• When you turn on an electrical equipment, surge current can be restrained by a power NTC thermistor connected in series with the power circuit
• Because of the continuing action of current, temperature of power NTC thermistor raising, the resistance will rapidly drop to a small value, the consumed power can be ignored
• So it can't affect normal operating current
• Therefore, using power NTC thermistor is a most effectively and most brief measure to restrain surge current, protecting electrical, equipment from destruction