1. General Description & Series Overview

️· Product: The document describes the C137 series of thyristors.
️· Type: They are silicon-controlled rectifiers (SCRs).
️· Function: They are power control devices used for switching and rectification.
️· Intended Use: Suitable for applications like motor control, lighting control, power supplies, and solid-state switches.

2. Key Electrical Characteristics (Typical Values - See Table at End)

️· Voltage Blocking: Rated blocking voltage (VDRM / VRRM) varies from 500 to 1200 Volts depending on the specific C137 variant.
️· Gate Triggering:
- Gate trigger current (IGT) is around 0.25 - 0.4 mA.
- Gate trigger voltage (VGT) is approximately 190 V.
️· Peak One Cycle Surge Current (ITSM): Up to 360 Amperes.
️· Maximum Stud Torque: 30 lb-in (35 Kg-cm).
️· Thermal Resistance (R0jc): Ranges from 2.0 to 1.7°C/watt.
️· Turn-Off Time: Not 100% factory tested (special selections available).

3. Environmental/Operating Conditions

️· Junction Temperature (Tj): -65°C to +125°C.
️· Storage Temperature (Tstg): -65°C to +150°C.
️· dv/dt Rating: The document cautions about exceeding the rated dv/dt, as it can cause device switching.

4. Package & Mechanical Details

️· Package Type: TO-48 (Complies with JEDEC TO-48 standard).
️· Pinout:
- Anode connection is via the case.
- Cathode is via one terminal.
- Gate is via the remaining terminal.
️· Thread Details: The case has threads for mounting.
️· Optional Features: Chamfers or undercuts may be present on the package.

5. Specific C137 Variants (Example – From Table)

Feature	C137E	C137M	C137S	C137N	C137T	C137P	C137PB
VDRM/VRRM
IGT	0.25
VGT	190
ITSM

*The Table is incomplete so some values are missing.*

Important Notes/Cautions:

️· dv/dt: Exceeding the rated dv/dt can cause unintended switching.
️· Turn-Off Time: The turn-off time is not a standard factory test.
️· dv/dt Rating: Higher values can cause device switching.