Time Delay Starting 75C 1200OHM MZ31 PTC Thermistor Resistance For Lighting

Time Delay Starting MZ31 PTC Thermistor MZ6 75C 800~1200 Ohm Dia 6mm For Lighting

I Description Of The Time Delay Starting MZ31 PTC Thermistor MZ6

MZ31 series of PTC Thermistor are applicable to various types of fluorescent lamp, electronic

ballast and electronic energy-saving lamp. The PTC can be connected across the lamp resonator

without changing the circuits. It can change hard start of the ballast and electronic energy-saving

lamp to preheated start and the preheating time of the filament can come up to 0.4-2 seconds,

which will extend the service life of the fluorescent tube by over 3 times.

These directly heated ceramic-based thermistors have a
positive temperature coefficient and are primarily intended
for overload protection. They consist of a ceramic pellet
soldered between two tinned CCS wires and coated with a
UL 94 V-0 high temperature hard silicone lacquer.

II Application Of The Time Delay Starting MZ31 PTC Thermistor MZ6

The application of the PTC thermistor to achieve preheated start is as follows: Immediately after power
is switched on, Rt is in normal temperature state and its resistance is far lower than the C2 resistance.
The current through C1 and Rt forms a return circuit to preheat the filament. After about 0.4-2 seconds,
Rt joule heat temperature exceeds Curie point Tsw and skips into high resistance state of far higher
than C2 resistance. The current passes through C1 and C2 to form a return circuit, which causes L
resonance and produces high voltage to light the fluorescent tube.

III Features Of The Time Delay Starting MZ31 PTC Thermistor MZ6

• Small size
• High voltage (800 ~ 1000VAC more)
• Long life (more than 10,000 power switch)
• Power dissipation is low 

• Wide range of trip and non-trip currents: From 11 mA up to 800 mA
• Small ratio between trip and non-trip currents (It/Int = 1.5 at 25 °C)
• High maximum inrush current (up to 5.5 A)
• Leaded parts withstand mechanical stresses and vibration

IV Size Of The Time Delay Starting MZ31 PTC Thermistor MZ6 (Unit:mm)

V Coating Details Of The Time Delay Starting MZ31 PTC Thermistor MZ6

VI Electrical Performances Of The Time Delay Starting MZ31 PTC Thermistor MZ6

VII 125/140V Series Of The Time Delay Starting MZ31 PTC Thermistor MZ6

VIII MOUNTING Of The Time Delay Starting MZ31 PTC Thermistor MZ6

PTC thermistors can be mounted by wave, reflow, or hand-soldering. Current levels have been determined
according IEC 60738 conditions. Different ways of mounting or connecting the thermistors can influence their
thermal and electrical behavior. Standard operation is in still air, any potting or encapsulation of PTC thermistors is not
recommended and will change its operating characteristics.

VIIII Typical Soldering Of The Time Delay Starting MZ31 PTC Thermistor MZ6

235 °C; duration: 5 s (Lead (Pb)-bearing)
245 °C, duration: 5 s (Lead (Pb)-free)
Resistance to Soldering Heat
260 °C, duration: 10 s max.