The 2N690 is a high-reliability silicon controlled rectifier (SCR) designed for dependable power switching and control in industrial, aerospace, and defense environments. Packaged in a rugged TO-48 / TO-208AA stud-mount metal case, it provides excellent mechanical durability and thermal performance. As part of the 2N68x–2N69x family of reverse-blocking SCRs (2N681–2N692), it offers a balanced combination of voltage capability, current handling, and long-term reliability.
The 2N690 delivers a repetitive peak off-state voltage (V_DRM / V_RRM) of approximately 600 V, an RMS on-state current of 25 A, and a non-repetitive surge current up to 150 A. Available as standard, JAN, or JANTX-qualified per MIL-PRF-19500/108, it ensures military-grade performance and stability under demanding electrical and environmental conditions.
When a positive gate signal is applied, the SCR conducts between the anode and cathode and remains on until the current drops below the holding threshold — enabling precise power regulation and controlled rectification.
Anode – threaded stud (mount)
Cathode – main output lead
Gate – control input
Military and aerospace power control systems
Industrial motor drives and automation
Power conversion and rectification units
Pulse discharge and capacitor systems
High-reliability defense and avionics power supplies
Pros: Rugged design, strong surge capability, JAN-qualified reliability, excellent thermal management.
Cons: Requires moderate gate trigger current; slower than MOSFETs/IGBTs for fast-switching applications.
Peak Repetitive Reverse Voltage VRRM:600
Peak Repetitive Off-State Voltage VDRM:600
Average On-State Current IAVA:16
Max Off-State Current IRRM,IDRMmA:2.5
Peak Non-Repetitive Surge Current ITSM @ Ipp AMPS:150
Gate Trigger Voltage VGTV:2
Gate Trigger Current IGTmA:40
Peak On-State Voltage VTM:2
Holding Current IHmA:20
Package:TO-48