Types of Heaters:

MZFT-J □□X□□

Item	Symbol	Description
Name	MZ	PTC heating element
Type	FR	Fan Heater
Insulation	D	Surface electrified (radiator with electirc)
	J	Surface insulated( radiator without electirc)
Input power	2 digits	1/100 of rated input (keeps one decimals)
Structure	non	glue (default)
	X	fixturing（including type of rectangle,tubular,coil and fin-tube）
Size	2 digits	1/10 of size of radiator (keeps one decimals)
Code	non	First design (default)
	/A	Modification version

Parameters of PTC heaters

Item	D series (glue/electrified)	J series (glue/insulation)	JX series (tube/insulation)
Rated Input	12V  to 600V
Rated Frequency	50Hz/60Hz
Length of Radiator	50mm~750mm
Rated Input power	100W~6000W		100W~6000W
Tolerance for Input power	+5％ ~ -10％
Max Initial Current	1≤1.5 * Work Current /≤ 2.5 * Work Current
Insulation Resistance	—	≥10MΩ
Electric Strength	—	1250V/1min
Leaking Current	—	≤0.5mA
Withstand Voltage	450V/1min / 250V/1min
Response  time of thermostat when overheated	≤ 6min(fixed  on plastic support)
Response time of fuse when overheated	≤15min(fixed on plastic support)
Power decay rate (1000h)	≤10％

Attention for use:
1. Since the power of PTC heater is greatly influenced by ambient  temperature, the ideal test is to fix it in a complete machine under standard ambient conditions. In practice, test is done with the samples  in a machine after adjustment of relavant parameters, with ambient temperature at 20~25℃.
2. In consideration of thermal expansion, there should be some gap(more than 5mm) around the PTC heaters
3. For heaters of surface-electrified type, it should be aware that safety distance is necessary to keep away from body, metals and frost. Comparatively, the surface-insulation type is more reliable in safety.
4. When heaters connected to three-phase supply, the middle point should be connected with null line so that terminal voltage would not exceed due to imbalance of voltage.