STMicroelectronics TS1220-600B

Overview

TS1220-600B from STMicroelectronics is a sensitive 12 A, 600 V silicon-controlled rectifier (SCR) designed for low-gate-current triggering in capacitive discharge ignition, motor control, and voltage regulation circuits. It features 200 µA maximum gate trigger current (IGT), 1.6 V maximum on-state voltage (VTM) at 24 A, and DPAK surface-mount package with 1.3 °C/W junction-to-case thermal resistance.

For engineers reviewing the TS1220-600B datasheet, TS1220-600B pinout, TS1220-600B application, or TS1220-600B equivalent, key selection criteria include sensitive gate drive capability (≤200 µA), robust surge rating (110 A @ 10 ms), dV/dt immunity (≥5 V/µs), and thermal performance in compact DPAK layout for power tool and appliance control designs.

Technical Context

The TS1220-600B operates as a unidirectional thyristor with latching behavior triggered by sub-milliampere gate current. Its low IGT (200 µA max) enables direct drive from microcontrollers or optocouplers without external amplification. The device sustains 600 V repetitive peak off-state voltage and maintains holding current ≤5 mA across -40 °C to +125 °C junction temperature.

Thermal design is enabled by its 1.3 °C/W Rth(j-c) and 70 °C/W Rth(j-a) (S = 0.5 cm² copper pad). Electrical robustness includes 110 A non-repetitive surge current (10 ms), 60 A²s I²t rating, and 50 A/µs critical dI/dt-supporting fast-switching crowbar and motor commutation applications.

Key Specifications

Pinout & Package

TS1220-600B uses the DPAK (TO-252) surface-mount package with three terminals: Anode (A), Cathode (K), and Gate (G). The package features a thermally enhanced exposed tab (Anode-connected) for efficient heat transfer to PCB copper.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SCR-based control applications.

Compared with Littelfuse S4012L and ON Semi 2N6504, TS1220-600B delivers superior sensitivity (200 µA vs ≥500 µA), smaller DPAK footprint, and better thermal efficiency-making it optimal for space-constrained, low-power-triggered motor and ignition systems.

Availability

TS1220-600B is available at Aetrix Electronics and suitable for capacitive ignition systems, DC brush motor drives, and battery charger crowbar protection requiring stable component supply and long-term industrial availability.

Supply support for TS1220-600B includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in power, analog, MEMS, and microcontroller technologies for industrial, automotive, and consumer markets.

The TS1220 series belongs to ST's high-sensitivity SCR product line, engineered specifically for low-power gate drive applications including motor control, ignition, and overvoltage protection where minimal trigger current and compact packaging are critical.

FAQ

What is the maximum allowable gate-cathode resistance for reliable triggering?

The datasheet specifies that IGT remains ≤200 µA with RL = 140 Ω and VD = 12 V. Using higher RGK increases required VGT; Figure 7 shows IH rises significantly above RGK = 1 kΩ. For guaranteed turn-on, RGK should not exceed 470 Ω in standard designs.

Can TS1220-600B be used in zero-crossing AC switching applications?

No-it is not optimized for zero-crossing operation. Its sensitive gate and low IH (≤5 mA) make it prone to false triggering near voltage zero. It is intended for phase-control or pulse-triggered applications like ignition and crowbar, not for silent TRIAC-style dimming or soft-start.

Is the DPAK tab electrically isolated or connected to a terminal?

The exposed DPAK tab is internally connected to the Anode (A) terminal. This is confirmed in ST's mechanical drawings and thermal data (Rth(j-c) defined with tab as case reference). PCB copper area under the tab must be routed to the anode net and sized per thermal requirements.

Does TS1220-600B require snubber circuitry in inductive load applications?

Yes-especially with high dI/dt loads like motors. Its dV/dt immunity is rated ≥5 V/µs only with RGK = 220 Ω. Inductive kick can exceed this; a standard RC snubber (e.g., 100 Ω + 100 nF) across A–K is recommended to suppress voltage transients and ensure reliable commutation.