

Model 803 Slim · Slim Analog Phase Angle Control Solid State Relay
UNI 803 PHT 24 50 420 + B-24 HEAT SINK + DIN RAIL
50 A · Phase angle solid state relay.
Specifications
- Slim width 23.6 mm design
- Thyristor controller (Phase Angle control SSR)
- Input
- 4 to 20mA/<100E or 0-10 VDC/560 Ω
- Output
- 230VAC or 440VAC (47-63 Hz), 50 Amp
- PIV
- 1200Vpk, I²T : 3000A²S for 9.6mS
- Body insulation
- 4kV for 1min
- I/P. to O/P. insulation
- 6kV for 1min
- Inbuilt surge voltage protection of 2700Vrms
- Short Circuit Protection by “B” Curve DP MCB
- Resistive load Max 15 A SC protect by 16 A DP MCB
Load current by heat sink
Rated at 40 °C ambient, from Unison's derating tables.
V-8722 Amp
B-2430 Amp
B-4816 A x 2 = 32 Amp
(16 A / phase across 2 phases)
B-7216 A x 3 = 48 Amp
(16 A / phase across 3 phases)
| Heat Sink / Mounting | Rated Load Current @ 40 °C |
|---|---|
| V-87 | 22 Amp |
| B-24 | 30 Amp |
| B-48 | 16 A x 2 = 32 Amp |
| B-72 | 16 A x 3 = 48 Amp |
Same series












