CYNA25-800 Crydom - SCR (Thyristor)

CYNA25-800 Description

The CYNA25-800 from Crydom is a solid state relay with an 800 V / 25 A rating. It is widely used for heater control, motor switching, lighting and process equipment where mechanical contacts would wear out.

USComponent (Young & New Century LLC) supplies power modules, thyristors, diodes and other industrial components, including legacy parts. Contact us for a quote on the CYNA25-800, and please confirm ratings against the datasheet before ordering.

Summary of Features

Target Applications

Crydom CYNA25-800 is used for controlled rectification and AC phase control in motor drives, heater control, power supplies, battery chargers and crowbar protection.

Key Specifications

Crydom CYNA25-800 is a 25 A, 800 V SCR (thyristor) in a TO-220AB isolated package. Source: Crydom CYNA/CYNB25 SCR datasheet. Values at 25°C unless noted.

Parameter	Value
RMS on-state current	25 A (Tc = 75°C)
Average on-state current	16 A (Tc = 75°C)
Repetitive peak off-state voltage (VDRM/VRRM)	800 V
Non-repetitive surge peak on-state current	320 A (50 Hz) / 350 A (60 Hz)
I²t for fusing (10 ms)	510 A²s
Gate trigger current IGT (max, VD = 12 V)	40 mA
Holding current IH (max)	50 mA
Critical rate of rise of off-state voltage dv/dt (min, Tj = 125°C)	1000 V/µs
On-state voltage VTM (max)	1.6 V @ ITM = 50 A
Thermal resistance junction to case	1.9 °C/W
Isolation voltage	2500 Vrms
Operating junction temperature	-40 to 125°C
Package	TO-220AB isolated

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