Harmony Solid State Relays, Solid state relay, 50A, panel mount, zero voltage switching, input 180…280V AC, output 48…530V AC

Harmony Solid State Relays, Solid state relay, 50A, panel mount, zero voltage switching, input 180…280V AC, output 48…530V AC

Item Number: SSP3A250P7

SSP panel mount relay is part of the Harmony Solid sate relays range. This three-phase panel mount static relay accepts wiring with either bare cable, crimped cable ends, fork lugs or ring lugs Its rated current is 50A, is controlled withA 180V to 280V AC circuit, has a rated load voltage of 48V to 530V AC output. It has a visual indicator showing the status of its input and a alarm output enabling a quick response to unexpected events


Product Dimensions

Width icon

Width101.3 mm

Height icon

Height79.7 mm

Depth icon

Depth35.4 mm


Qty UoM EAN Colour



Range of product

Harmony Solid State Relays

Product or component type

solid state relay up to 50 A

Sustainable offer status

Green Premium product


Mounting support


[in] rated current

50 A

Connections - terminals

screw connectors

Control type

without test button

Insulation resistance

>= 1000 MOhm at 500 V DC

Connections - terminals

screw terminals: 1 x 0.2...1 x 2.5 mm², (AWG 24...AWG 14) for input|screw terminals: 1 x 1.5...1 x 10 mm², (AWG 16...AWG 8) for output

Local signalling

LED, green for input

Ip degree of protection


Net weight

0.24 kg


101.3 mm


79.7 mm


35.4 mm

Device presentation

complete product

Ambient air temperature for operation

-40...80 °C

Ambient air temperature for storage

-40...125 °C

Product certifications





IEC 60950-1|IEC 62314|IEC 61000

Reach regulation

Reference contains Substances of Very High Concern above the threshold

Eu rohs directive

Pro-active compliance (Product out of EU RoHS legal scope)

Mercury free


Rohs exemption information


China rohs regulation


Environmental disclosure


Circularity profile


California proposition 65

WARNING: This product can expose you to chemicals including: Lead and lead compounds, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov


Package 1 bare product quantity


Device short name


Network number of phases

3 phases

Solid state output type

zero voltage switching

[uc] control circuit voltage

180...280 V

Output switching mode

zero voltage switching

Minimum switching voltage

180 V AC turn-on

Maximum switching voltage

10 V AC turn-off

Response time

20 ms (turn-on)|30 ms (turn-off)

Input current limits

7...20 mA

Load current

0.1...50 A

Absolute maximum voltage

1200 V

Surge current

715 A for 20 ms|750 A for 16.6 ms|150 A for 1 s

Maximum i²t for fusing

2520 A².s for 10 ms at 50 Hz|2320 A².s for 8.3 ms at 60 Hz

Maximum leakage current

3 mA off-state

Maximum voltage drop

<1.35 V on-state


500 V/µs off-state at maximum voltage

Cos phi

0.5...0.5 (with maximum load)

Motor power hp

1.5 hp 40 °C 120 V AC|3 hp 40 °C 240 V AC|7.5 hp 40 °C 480 V AC|8.8 hp 40 °C 530 V AC

Motor power kw

1.11 kW at 40-40 °C 120 V AC|2.22 kW at 40-40 °C 240 V AC|5.55 kW at 40-40 °C 480 V AC|6.47 kW at 40-40 °C 530 V AC

Capacitance unbalance

8 pF for input/output

Dielectric strength

4 kV AC for input/output|4 kV AC for input or output to case

Tightening torque

0.9...1.1 N.m for input|1.7...2.2 N.m for output

Thermal resitance

0.12 °C/W

Flame retardance

V0 conforming to UL 94

Pollution degree


Overvoltage category


Unit type of package 1


Number of units in package 1


Package 1 height

4.0 cm

Package 1 width

8.5 cm

Package 1 length

12.0 cm

Package 1 weight

278.0 g

Unit type of package 2


Number of units in package 2


Package 2 height

15.0 cm

Package 2 width

30.0 cm

Package 2 length

40.0 cm

Package 2 weight

11.588 kg
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