STMicroelectronics TN4015H-6G

Overview

TN4015H-6G from STMicroelectronics is a high-temperature, 40 A, 600 V RMS SCR in D²PAK package, designed for robust AC power control with gate trigger current of 15 mA, dV/dt immunity of 500 V/µs at 150 °C, and critical dI/dt rating of 100 A/µs - deployed in motorbike voltage regulators, solid-state relays, and inrush limiting circuits.

For engineers reviewing the TN4015H-6G datasheet, TN4015H-6G pinout, TN4015H-6G application, or TN4015H-6G equivalent, key selection factors include junction temperature capability (150 °C), off-state voltage (600 V), thermal resistance (0.8 °C/W j-c), gate sensitivity (15 mA IGT), and SMD-compatible D²PAK packaging for compact back-to-back configurations.

Technical Context

The TN4015H-6G is a planar passivated silicon SCR optimized for high-temperature operation up to Tj = 150 °C, enabling sustained 40 A RMS conduction at case temperatures up to 119 °C. Its dV/dt immunity remains stable at 500 V/µs even at maximum junction temperature, reducing false triggering in noisy industrial environments.

It features a low on-state threshold voltage (0.85 V at 150 °C) and dynamic resistance of 10 mΩ, supporting efficient power handling with minimal conduction loss. Gate drive requirements are defined by IGT ≤ 15 mA and VGT ≤ 1.3 V at 25 °C, with latching (IL ≤ 80 mA) and holding (IH ≤ 60 mA) currents validated across the full temperature range.

Key Specifications

Pinout & Package

The TN4015H-6G uses the D²PAK (TO-263) surface-mount package with three terminals: Anode (A), Cathode (K), and Gate (G). The exposed metal tab is electrically connected to the Anode and serves as the primary thermal path to the PCB copper pour or heatsink.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BT139-600E and STTH1206D, the TN4015H-6G delivers uniquely high RMS current (40 A), extreme temperature resilience (150 °C), and noise-hardened triggering - making it irreplaceable in high-stress, thermally constrained AC control roles where reliability cannot be compromised.

Availability

TN4015H-6G is available at Aetrix Electronics and suitable for motorbike voltage regulators, solid-state relays, and inrush current limiting circuits requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for TN4015H-6G 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, designing and manufacturing analog, power, MCU, and sensor solutions for automotive, industrial, and consumer markets.

The TN4015H-6G belongs to ST's high-temperature SCR family, engineered specifically for ruggedized AC power control in harsh thermal and electrical environments - including engine bays, industrial motor starters, and crowbar protection circuits.

FAQ

What is the maximum allowable case temperature for continuous 40 A RMS operation?

The TN4015H-6G supports 40 A RMS conduction at Tc = 119 °C, as specified in Table 2 (Absolute Maximum Ratings). Operation above this temperature requires derating per Figure 2 in the datasheet. Thermal design must maintain junction temperature ≤150 °C using the 0.8 °C/W Rth(j–c) value and adequate heatsinking.

Can TN4015H-6G be used in back-to-back configuration for AC switching?

Yes - its D²PAK package exposes the anode tab, enabling mechanical and thermal integration in back-to-back SCR arrangements. This configuration provides full AC bidirectional control, commonly used in solid-state relays and motor starters, with each device handling one half-cycle.

Is a snubber circuit required for reliable operation?

A snubber is recommended when switching inductive loads or in high-dV/dt environments, despite the device's 500 V/µs rating. The 100 A/µs dI/dt rating also necessitates careful layout to minimize stray inductance; RC snubbers help suppress voltage overshoot during turn-off and improve commutation robustness.

What is the gate drive energy requirement for reliable triggering?

Gate triggering requires a pulse with peak current ≥15 mA (IGT max), voltage ≥1.3 V (VGT max), and rise time ≤100 ns. Typical gate drive energy is <100 µJ per pulse. Optocoupler drivers such as MOC3021 (with external amplification) or dedicated SCR gate drivers (e.g., TLP360J) meet these requirements reliably.