SSR perform the same job as Mechanical Relays, but have the following advantages:

1. SSR produce less electromagnetic interference than mechanical relays during operation. This is mostly due to the absence of a phenomenon called contact arcing only present in mechanical relays, where the physical contacts of the relay tend to spark internally while switching. The reduced interference can also be attributed to the fact that SSRs do not use electromagnets to switch.

2. The switch contacts of a mechanical relay will eventually wear down from arcing. An SSR will have a longer life because its internals are purely digital. Properly used, they will last for millions of cycles.

3. SSR turn on and off faster than mechanical relays (≈1ms compared to ≈10ms).

4. SSR are less susceptible to physical vibrations than mechanical relays. 

5. Since the switch inside an SSR isn't a mechanical switch, it does not suffer from contact bounce and operates silently. 

SSR-S40DA-H 40A Single Phase Solid State Relay 

 

Product Photos

(Series Name or)  Product Item No.	SSR-S10DA	SSR-S25DA	SSR-S40DA	SSR-S10DA-H	SSR-S25DA-H	SSR-S40DA-H
Specifications/Dimensions
L x W x H	57 x 42 x 24 mm	57 x 42 x 24 mm	57 x 42 x 24 mm	57 x 42 x 24 mm	57 x 42 x 24 mm	57 x 42 x 24 mm
Ref. L1 x W1	43.8 x 27 mm	43.8 x 27 mm	43.8 x 27 mm	43.8 x 27 mm	43.8 x 27 mm	43.8 x 27 mm
Ref. L2 x W2	46.3 x 12 mm	46.3 x 12 mm	46.3 x 12 mm	46.3 x 12 mm	46.3 x 12 mm	46.3 x 12 mm
Ref. Diameter (Ø)	5 mm	5 mm	5 mm	5 mm	5 mm	5 mm
Electrical Specifications
Max. Load Current	10 A	25 A	40 A	10 A	25 A	40 A
Control Method	Zero Cross	Zero Cross	Zero Cross	Zero Cross	Zero Cross	Zero Cross
Input Operating Voltage	4~32 VDC	4~32 VDC	4~32 VDC	4~32 VDC	4~32 VDC	4~32 VDC
Input Current	20mA@ 32 VDC	20mA@ 32 VDC	20mA@ 32 VDC	20mA@ 32 VDC	20mA@ 32 VDC	20mA@ 32 VDC
Must Turn Off Voltage	0~2.5 VDC	0~2.5 VDC	0~2.5 VDC	0~2.5 VDC	0~2.5 VDC	0~2.5 VDC
Output Load Voltage Range	24~280 VAC	24~280 VAC	24~280 VAC	90~480 VAC	90~480 VAC	90~480 VAC
Max. One Circle Peak Surge	120 A	250 A	400 A	120 A	250 A	400 A
Min. Blocking Voltage	600 V	600 V	600 V	600 V	600 V	600 V
Turn On & Turn Off Time	< 1/2 AC circle	< 1/2 AC circle	< 1/2 AC circle	< 1/2 AC circle	< 1/2 AC circle	< 1/2 AC circle
Isolate Impedance	50 MΩ 500 VDC	50 MΩ 500 VDC	50 MΩ 500 VDC	50 MΩ 500 VDC	50 MΩ 500 VDC	50 MΩ 500 VDC
Max. On-State Voltage Drop	1.6 V / 25oC	1.6 V / 25oC	1.6 V / 25oC	1.6 V / 25oC	1.6 V / 25oC	1.6 V / 25oC
Materials
Body Materials	PBT
Color	White
Accessories & Parts
Protective Cover	SSR-S-CV (Optional)
Heat Sink	HS-60XXX series (HS-60050, HS-60100, HS-60150, HS-60200)
Approval & Certificate	UL/cUL File No. E301692, CE, LVD

Packaging

100pcs/ctn, N.W. :11.6kgs /carton