Product Details

10A 25A 40A Solid State Relay

Solid state relays (triacs output)

Series GD Solid State Relays are AC relays,Triac Output. The triac version of the zero switching relay is an inexpensive solution for resistive loads. The zero switching relay switches on when the AC sine voltage just crosses zero,and switches off when the current crosses zero.

Features

Rated operational current 10 to 40 Amps.

Rated operational voltage 240V or 440 V.

Input Voltage Range 4 to 16 Vdc,3 to 32 Vdc or 90 to 280 Vac.

4000 Vrms Optical Isolation.(input/output)

Both “Zero Voltage” & phase controllable “Random Switching” versions.

LED-indication for control input.

Symbol	Meaning
G	Greegoo
D	Single phase
*	10-10A, 25-25A, 40-40A
*	24-240V,48-480V
*	Z-zero control, R-random control
*	D1-4-16Vdc, D3-4-32Vdc, A2-90-280Vac
For example:	GD4048ZD3, single phase, 40A，480Vac，3-32Vdc control

Voltage	Control voltage	Rated operational current
Voltage	Control voltage	10 Amp	15 Amp	25 Amp	40 Amp
240 VAC “Z”	4 to 16 Vdc	GD1024ZD1	GD1524ZD1	GD2524ZD1	GD4024ZD1
240 VAC “R”	4 to 16 Vdc	GD1024RD1	GD1524RD1	GD2524RD1	GD4024RD1
240 VAC “Z”	4 to 32 Vdc	GD1024ZD3	GD1524ZD3	GD2524ZD3	GD4024ZD3
240 VAC “R”	4 to 32 Vdc	GD1024RD3	GD1524RD3	GD2524RD3	GD4024RD3
240 VAC “Z”	90 to 250Vac	GD1024ZA2	GD1524ZA2	GD2524ZA2	GD4024ZA2
240 VAC “R”	90 to 250Vac	GD1024RA2	GD1524RA2	GD2524RA2	GD4024RA2
440 VAC “Z”	4 to 16 Vdc	GD1044ZD1	GD1544ZD1	GD2544ZD1	GD4044ZD1
440 VAC “R”	4 to 16 Vdc	GD1044RD1	GD1544RD1	GD2544RD1	GD4044RD1
440 VAC “Z”	4 to 32 Vdc	GD1044ZD3	GD1544ZD3	GD2544ZD3	GD4044ZD3
440 VAC “R”	4 to 32 Vdc	GD1044RD3	GD1544RD3	GD2544RD3	GD4044RD3
440 VAC “Z”	90 to 250Vac	GD1044ZA2	GD1544ZA2	GD2544ZA2	GD4044ZA2
440 VAC “R”	90 to 250Vac	GD1044RA2	GD1544RA2	GD2544RA2	GD4044RA2
Voltage	Control voltage	Rated operational current
Voltage	Control voltage	10 Amp	15 Amp	25 Amp	40 Amp
280 VAC “Z”	4 to 16 Vdc	GD1028ZD1	GD1528ZD1	GD2528ZD1	GD4028ZD1
280 VAC “R”	4 to 16 Vdc	GD1028RD1	GD1528RD1	GD2528RD1	GD4028RD1
280 VAC “Z”	4 to 32 Vdc	GD1028ZD3	GD1528ZD3	GD2528ZD3	GD4028ZD3
280 VAC “R”	4 to 32 Vdc	GD1028RD3	GD1528RD3	GD2528RD3	GD4028RD3
280 VAC “Z”	90 to 250Vac	GD1028ZA2	GD1528ZA2	GD2528ZA2	GD4028ZA2
280 VAC “R”	90 to 250Vac	GD1028RA2	GD1528RA2	GD2528RA2	GD4028RA2
480 VAC “Z”	4 to 16 Vdc	GD1048ZD1	GD1548ZD1	GD2548ZD1	GD4048ZD1
480 VAC “R”	4 to 16 Vdc	GD1048RD1	GD1548RD1	GD2548RD1	GD4048RD1
480 VAC “Z”	4 to 32 Vdc	GD1048ZD3	GD1548ZD3	GD2548ZD3	GD4048ZD3
480 VAC “R”	4 to 32 Vdc	GD1048RD3	GD1548RD3	GD2548RD3	GD4048RD3
480 VAC “Z”	90 to 250Vac	GD1048ZA2	GD1548ZA2	GD2548ZA2	GD4048ZA2
480 VAC “R”	90 to 250Vac	GD1048RA2	GD1548RA2	GD2548RA2	GD4048RA2

Recommend for resistive load SSR

Triacs output, aluminium base, LOW COST

Voltage	Control voltage	25 Amp	40 Amp	60A	80A	100A
240 VAC “Z”	4 to 32 Vdc	GDH2524ZD3E	GDH4024ZD3E	GDH6024ZD3E	GDH8024ZD3E	GDH10024ZD3E
240 VAC “Z”	90 to 250Vac	GDH2524ZA2E	GDH4024ZA2E	GDH6024ZA2E	GDH8024ZA2E	GDH10024ZA2E
480 VAC “Z”	4 to 32 Vdc	GDH2548ZD3E	GDH4048ZD3E	GDH6048ZD3E	GDH8048ZD3E	GDH10048ZD3E
480 VAC “Z”	90 to 250Vac	GDH2548ZA2E	GDH4048ZA2E	GDH6048ZA2E	GDH8048ZA2E	GDH10048ZA2E

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:SCR output SSR and Triacs output SSR, what's their difference?

TRIAC Output SSR: Simple, cost-effective, and suitable for low to medium power AC load switching applications, particularly in consumer or light industrial settings. Limitations include lower performance and durability under high current/voltage and inability to regulate current.

SCR Output SSR: Uses dual SCRs, designed for high-power, high-voltage, and heavy-load applications with better thermal management, higher reliability, and longer lifespan. Supports both zero-crossing and random switching modes, and can regulate current, making it ideal for industrial applications but at a higher cost.

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10-40A single phase SSR (PDF)40A to 120A Single phase solid state relays (PDF)

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