Product Details

DC Pulse Width Modulation Type Solid State Regulator TZ03D

The weak current part and the strong current part are isolated by optoelectronics and transformers.

Transistor PWM output, with a wide range of adjustable output power.
Contactless output, no sparks or mechanical wear during operation, resulting in a longer lifespan.
Built-in freewheeling diode at the output load end, no additional protection needed for inductive loads.
Solid encapsulation, shockproof, corrosion-resistant, safe and reliable during operation.
Mainly used for power regulation of high-power electric heaters in DC power supplies, dimming of lighting lamps and speed control of electric motors.

Specification

Model	TZ03D	TZ04D
Maximum Output Voltage	100, 200, 600, 1200 VDC	100, 200, 600, 1200 VDC
Maximum Output Current	60～500 A	60～500 A
Control Method	Potentiometer Adjustment: 30K/2W	Proportional Adjustment: 0-5VDC; 0-10VDC; 4-20mA
Control Power Supply	12VDC (≤40mA) or 24VDC (≤50mA)	12VDC (≤40mA) or 24VDC (≤50mA)
Off-state Voltage	100, 200, 600, 1200 VDC	100, 200, 600, 1200 VDC
Output Switching Time	0～3 ms	0～3 ms
Isolation Voltage	≥ 2000 V	≥ 2000 V
Insulation Voltage	≥ 2500 V	≥ 2500 V
Ambient Temperature	-30 ～ 75 ℃	-30 ～ 75 ℃
Cooling Conditions	60 with heatsink; ≥120A with additional fan cooling	60 with heatsink; ≥120A with additional fan cooling
Load Current Safety Factor	Resistive load 2～3 times; Inductive load 3～5 times	Resistive load 2～3 times; Inductive load 3～5 times
Dimensions	95×60×46mm	95×60×46mm

Selection tips

Since the maximum output voltage in the parameter table equals the forward breakdown voltage and the maximum output current is the value at room temperature, sufficient margin should be left when selecting. For resistive loads: select the current at 3 to 4 times the load current and the voltage at 2 to 3 times. For inductive loads: select the current at 4 to 6 times and the voltage at 4 to 5 times.

When the ambient temperature is high or the cooling conditions are poor, the current rating should be increased and the size of the heatsink should be enlarged. To prevent overcurrent or short circuit in the load during use, a fast circuit breaker or fast fuse should be added to the main circuit.

Since this product is internally equipped with a freewheeling diode, it can work safely without overvoltage protection for inductive loads under the specified DC power supply voltage. However, for rectified power supplies, it is best to connect a varistor (MOV) across the power supply terminals, selected at 1 to 2 times the power supply voltage, and the RC value should be selected according to the load power.

During installation, the contact surface between the heatsink and this product must be flat and smooth, and a layer of thermal grease should be applied to the surface. Finally, tighten and fix the screws with flat washers and spring washers symmetrically.

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