The 2N687 is a high-reliability silicon controlled rectifier (SCR) housed in a durable TO-48 / TO-208AA stud-mount metal package, engineered for high-performance power control and switching in demanding military, aerospace, and industrial environments. As a member of the 2N68x–2N69x family of reverse-blocking SCRs (2N681–2N692), it offers excellent electrical performance, thermal efficiency, and proven reliability across a wide range of power applications.
The 2N687 provides a repetitive peak off-state voltage (V_DRM / V_RRM) of approximately 800 V, an RMS on-state current of 25 A, and a non-repetitive surge current up to 150 A. It is available in standard or JAN / JANTX-qualified versions compliant with MIL-PRF-19500/108, guaranteeing long-term durability and mission-critical dependability under harsh environmental conditions.
When the gate receives a triggering pulse, the SCR switches from a non-conductive to a conductive state between the anode and cathode. It remains on until the current drops below the holding current, enabling precise control of power in AC or DC circuits.
Anode – threaded stud (mount)
Cathode – main output terminal
Gate – control input lead
Military and aerospace power control systems
Industrial motor drives and automation
Power conversion and rectification systems
Pulse discharge and capacitor energy systems
High-reliability defense and avionics power supplies
Pros: Rugged stud package, high voltage capability, JAN-qualified reliability, strong surge current handling.
Cons: Requires gate drive current; slower than modern MOSFETs/IGBTs for fast-switching tasks.
Peak Repetitive Reverse Voltage VRRM:300
Peak Repetitive Off-State Voltage VDRM:300
Average On-State Current IAVA:16
Max Off-State Current IRRM,IDRMmA: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-48A