B644-2T Crydom - Power Transistor Module

B644-2T Description

Crydom makes the B644-2T, a solid state relay. Typical uses include temperature control of heaters, packaging and plastics machinery, and general industrial load switching.

USComponent has been supplying power semiconductors since 2001, including discontinued and hard-to-find part numbers. Send us an RFQ for the B644-2T and we will reply with price, condition and lead time. Please check the manufacturer's datasheet to confirm ratings, package and pin-out before you order.

Summary of Features

Target Applications

Crydom B644-2T is used for AC/DC power conversion and control: controlled rectifiers, DC motor drives, heater and power control, battery chargers and power supplies.

Key Specifications

Crydom B644-2T is a B-2T Series power module (B6, 42.5 A), circuit type 4, 480 VAC line, standard case, for AC or DC variable voltage output. Source: Crydom B-2T, B-2 Series datasheet (Rev 121411). Values at 25°C unless noted.

Parameter	Value
Maximum DC output current (Tc = 85°C)	42.5 A
AC line input voltage	480 Vrms (1200 VRRM)
Circuit type	4 (see datasheet schematic)
Maximum voltage drop (VF)	1.65 V @ 42.5 A
Maximum non-repetitive surge current (1/2 cycle, 60 Hz)	600 A
Maximum I²t for fusing (8.3 ms)	1500 A²s
Critical rate of rise of on-state current (Tj = 125°C)	100 A/µs
Critical rate of rise of off-state voltage	500 V/µs
Gate trigger current / voltage (25°C)	80 mA / 3.0 V
Average gate power	0.5 W
Maximum peak reverse gate voltage	5.0 V
Maximum thermal resistance, junction to ceramic base per chip	0.7 °C/W
Operating junction temperature	-40 to 125°C
Isolation voltage	2500 Vrms
Weight (typical)	1.5 oz (42.5 g)

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