Dongguan Ampfort Electronics Co., Ltd.
                                                                                                           
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Vishay MZ5 PTC Thermistor 105°C 300R for Electronic Ballasts - 56V/80V Series with 0.4-2s Preheating

Price Negotiable
Price: TBA
MOQ: 1000 Pieces
Delivery Time: 2 Weeks
Brand: AMPFORT
Product Description
Vishay Cross Silicon Coating PTC Thermistor MZ5 105°C 300R
The MZ5 series PTC thermistors are specifically designed for electronic ballasts and energy-saving lamps, converting hard starts to preheating starts with 0.4-2 second filament warm-up times to extend lamp life by over 4 times.
Product Overview
These PTC thermistors connect directly across the resonant capacitor terminals without circuit modifications, providing reliable preheating start functionality for fluorescent lamps from 3W to 85W.
Key Applications
Circuit Control & Sensing
  • Electronic ballasts and energy-saving lamps
  • Temperature compensation and control circuits
  • Overheat protection systems
  • Battery charging and transformer protection
  • Compressor and motor overload security
Electric Heating Appliances
  • Space heaters and drying equipment
  • Hair dryers and personal care devices
  • Kitchen appliances including rice cookers
  • Industrial sealing and welding equipment
Automotive Applications
  • Electrical overload protection
  • Low temperature start heaters
  • Fuel heating systems
  • Engine temperature monitoring
Operating Principle
When power is applied, the cold PTC thermistor provides low resistance for filament preheating. After 0.4-2 seconds, the device heats beyond its Curie point, resistance increases dramatically, and current shifts to create LC resonance for lamp ignition.
PTC thermistor operating principle diagram showing circuit flow and timing
Technical Specifications - 56V/80V Series
Model Max Voltage Current @60°C Max Current Resistance @25°C Curie Point
MZ8B08D120C22RM56V 56V 90mA 1.0A 22Ω ±20% 120°C
MZ8B08D120C8R2M56V 56V 130mA 1.0A 8.2Ω ±20% 120°C
MZ8B10D120C15RM56V 56V 150mA 1.2A 15Ω ±20% 120°C
MZ8B11D120C3R9M56V 56V 210mA 2.0A 3.9Ω ±20% 120°C
MZ6B06D120C55RN80V 80V 50mA 0.7A 55Ω ±25% 120°C
MZ8B08D120C25RN80V 80V 110mA 1.0A 25Ω ±25% 120°C
Notes: 75°C, 85°C and 105°C series PTC thermistors are commonly used. All MZA series products comply with SGS testing for restricted substances including lead, cadmium, mercury, and hexavalent chromium.

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Have questions about our products or want to discuss a custom order? Our team is ready to help you.

Company Dongguan Ampfort Electronics Co., Ltd.
Location Floor 5,Changlong Industrial Building,No.6,Jiangnan Road,Jingshan,Chashan Town,Dongguan 523323,China
Contact Person Annie Fang

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