Product Overview
C106B2 Westinghouse Sensitive Gate SCR - 200V 4A TO-202 Thyristor, Unused NOS
Condition
Unused NOS. Photos show the specific unit you will receive: TO-202 body marked "C106B2" and "W8842," leads straight with light oxidation consistent with storage age, no cracks or physical damage. Sourced from an electronics distributor consolidating inventory.
Ships same or next business day from our Idaho warehouse.
No hassle resolution if there is an issue. Serving customers since 1999.
Product Overview
C106B2 is a sensitive gate silicon-controlled rectifier (SCR) from Westinghouse, housed in a TO-202 through-hole package. It triggers on gate currents as low as 200 µA, making it well suited for low-power switching where minimal gate drive is available. Rated 200V peak repetitive off-state voltage and 4A RMS on-state current.
Key Features
- Package: TO-202, through-hole, 0.75 inches
- Peak Repetitive Off-State Voltage (VDRM): 200V
- RMS On-State Current (IT(RMS)): 4A
- Surge Current (ITSM): 20A
- Gate Trigger Voltage (VGT): 0.8V max
- Gate Trigger Current (IGT): 200 µA max - sensitive gate operation
- Peak On-State Voltage (VTM): 2.2V at 4A
- Holding Current (IH): 3 mA
- Operating Temperature: -40°C to +110°C
- Thermal Resistance: 7.5°C/W junction-to-case, 80°C/W junction-to-ambient
- Visible date code markings: W8842
Applications
- Temperature and light control circuits
- Small motor speed control
- Remote warning and alarm circuits
- Triggering and timing circuits
- Maker and hobbyist switching projects requiring low gate drive current
- Vintage electronics repair and restoration
Frequently Asked Questions
Is this a one-direction device only?
Yes. Like all SCRs, the C106B2 conducts in one direction only. Once triggered by a gate signal, it stays on until the anode-to-cathode current drops below the 3 mA holding current. If you need bidirectional control, a TRIAC is the appropriate choice instead.
Does the TO-202 package match standard TO-220 footprints?
No. TO-202 and TO-220 are different package outlines. Verify your board layout accepts a TO-202 before ordering - some C106 series parts exist in TO-220, but this unit is TO-202.
What is included?
One C106B2 SCR in TO-202 package, as shown in the photos.
What does the W8842 date code indicate?
W8842 is consistent with a Westinghouse factory date code - likely week 42 of 1988. Not confirmed against Westinghouse internal records, but consistent with the NOS status and distributor sourcing.
A Westinghouse SCR from 1988 that never made it into a circuit - still waiting for the right one. If your project needs a sensitive gate and a solid 200V rating, this little TO-202 has been holding its place in line for a while. Might as well be yours.
