The 2N688 is a high-reliability silicon controlled rectifier (SCR) packaged in a rugged TO-48 / TO-208AA stud-mount metal case, designed for reliable power switching and control in severe industrial, aerospace, and defense applications. As part of the 2N68x–2N69x family of reverse-blocking SCRs (2N681–2N692), it provides dependable performance, long service life, and stable operation under extreme environmental and electrical conditions.
The 2N688 offers a repetitive peak off-state voltage (V_DRM / V_RRM) of approximately 900 V, an RMS on-state current of 25 A, and a non-repetitive surge current up to 150 A. It is available in standard, JAN, or JANTX-qualified versions per MIL-PRF-19500/108, ensuring consistent quality and reliability for mission-critical systems.
Applying a positive gate signal triggers conduction between the anode and cathode. Once conducting, the SCR remains on until the current drops below the holding threshold, making it ideal for controlled rectification and power switching applications.
Anode – threaded stud (mount)
Cathode – main terminal lead
Gate – control input lead
Military and aerospace power control systems
Industrial motor drives and automation equipment
Power converters and rectifiers
Pulse discharge and capacitor banks
High-reliability defense power supplies
Pros: Excellent surge capability, high voltage tolerance, JAN-qualified reliability, rugged stud design.
Cons: Moderate gate current requirement; slower response than MOSFETs/IGBTs.
Peak Repetitive Reverse Voltage VRRM:400
Peak Repetitive Off-State Voltage VDRM:400
Average On-State Current IAVA:16
Max Off-State Current IRRM,IDRMmA:4
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