Product Details

200-400A Solid state relays

Single phase Solid State Relay (SCR output)

Series GDH are power line relays allowing 200 to 400 Amps. switching power,with Voltage ratings from 280 to 480 Volts A.C. GDH series is Dual SCR Power Hybrid technology provides highly efficient thermal management for greatly increased cyclic life.

Features
High performance/low cost circuit design.
Logic compatible current regulated input.
2500 Vrms optical isolation.
Both “Zero Voltage” & phase controllable “Random Switching” versions.
High voltage (1200 Vpk) versions for 480 Vrms service.
LED-indication for control input.

Control voltage range:4~16 Vdc ,4 to 32 Vdc or 90~280Vac.

Symbol	Meaning
G	Greegoo
D	Single phase
H	SCR output
*	200-200A, 250-250A, 300-300A, 350-350A, 400-400A
*	28-280V,48-480V
*	Z-zero control, R-random control
*	D1-4-16Vdc, D3-4-32Vdc, A2-90-250Vac
For example:	GDH25048ZD3, single phase, SCR output, 250A，480Vac，4-32Vdc control

Voltage	Control voltage	Rated operational current
Voltage	Control voltage	200 Amp	250 Amp	300 Amp
280 VAC zero crossing	4 to 16 Vdc	GDH20028ZD1B	GDH25028ZD1B	GDH30028ZD1B
	4 to 32 Vdc	GDH20028ZD3B	GDH25028ZD3B	GDH30028ZD3B
	90 to 250Vac	GDH20028ZA2B	GDH25028ZA2B	GDH30028ZA2B
280 VAC random switching	4 to 16 Vdc	GDH20028RD1B	GDH25028RD1B	GDH30028RD1B
	4 to 32 Vdc	GDH20028RD3B	GDH25028RD3B	GDH30028RD3B
	90 to 250Vac	GDH20028RA2B	GDH25028RA2B	GDH30028RA2B
480 VAC zero crossing	4 to 16 Vdc	GDH20048ZD1B	GDH25048ZD1B	GDH30048ZD1B
	4 to 32 Vdc	GDH20048ZD3B	GDH25048ZD3B	GDH30048ZD3B
	90 to 250Vac	GDH20048ZA2B	GDH25048ZA2B	GDH30048ZA2B
480 VAC random switching	4 to 16 Vdc	GDH20048RD1B	GDH25048RD1B	GDH30048RD1B
	4 to 32 Vdc	GDH20048RD3B	GDH25048RD3B	GDH30048RD3B
	90 to 250Vac	GDH20048RA2B	GDH25048RA2B	GDH30048RA2B
		300 Amp	350 Amp	400 Amp
280 VAC zero crossing	4 to 16 Vdc	GDH30028ZD1B	GDH35028ZD1B	GDH40028ZD1B
	4 to 32 Vdc	GDH30028ZD3B	GDH35028ZD3B	GDH40028ZD3B
	90 to 250Vac	GDH30028ZA2B	GDH35028ZA2B	GDH40028ZA2B
280 VAC random switching	4 to 16 Vdc	GDH30028RD1B	GDH35028RD1B	GDH40028RD1B
	4 to 32 Vdc	GDH30028RD3B	GDH35028RD3B	GDH40028RD3B
	90 to 250Vac	GDH30028RA2B	GDH35028RA2B	GDH40028RA2B
480 VAC zero crossing	4 to 16 Vdc	GDH30048ZD1B	GDH35048ZD1B	GDH40048ZD1B
	4 to 32 Vdc	GDH30048ZD3B	GDH35048ZD3B	GDH40048ZD3B
	90 to 250Vac	GDH30048ZA2B	GDH35048ZA2B	GDH40048ZA2B
480 VAC random switching	4 to 16 Vdc	GDH30048RD1B	GDH35048RD1B	GDH40048RD1B
	4 to 32 Vdc	GDH30048RD3B	GDH35048RD3B	GDH40048RD3B
	90 to 250Vac	GDH30048RA2B	GDH35048RA2B	GDH40048RA2B

Dimension

200A to 500A SSR relay

FAQ

Q:What's the benefit of a solid state relay?

SSRs have no mechanical parts, reducing the risk of arcing, making them more durable and reliable in high-frequency switching applications. Solid state relays can significantly decrease both downtime and maintenance costs.

Q:How to confirm the current and voltage of the solid state relay against inductive load and resistive load?

A margin should be left when selecting the voltage and current of the solid state relay. For resistive load: the current is selected according to 2.5~4 times the load current, and the voltage is selected according to 2~2.5 times the load power. Inductive load: current is selected according to 3-7 times load current, voltage is selected according to 2.5-3 times load voltage.

Q:What are the difference between SCR module and Solid state relay?

The main differences between a Silicon Controlled Rectifier (SCR) module and a Solid State Relay (SSR) lie in their functions and composition. An SCR can regulate current by controlling the conduction angle, while an SSR primarily acts as a switch and cannot regulate current. A Solid State Relay consists of an SCR and a synchronous trigger drive, with an integrated isolation trigger terminal, whereas an SCR requires external isolation. Although they may have similar functions in some applications, they differ significantly in regulation capability and internal structure.

Download

200A to 400A SCR output SSR module (PDF)

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