STMicroelectronics TN4015H-6I

Overview

TN4015H-6I from STMicroelectronics is a high-temperature, insulated-packaged silicon controlled rectifier (SCR) rated for 40 A RMS on-state current at Tc = 82 °C, 600 V repetitive peak off-state voltage (VDRM/VRRM), and 150 °C maximum junction temperature. It features 500 V/µs dV/dt immunity at 150 °C, 15 mA gate trigger current (IGT), and 100 A/µs critical rate of rise of on-state current (dl/dt), enabling robust operation in motorbike voltage regulators and solid-state relays.

For engineers reviewing the TN4015H-6I datasheet, TN4015H-6I pinout, TN4015H-6I application, or TN4015H-6I equivalent, key selection criteria include its insulated TO-220AB package (2500 VRMS isolation), high thermal capability (Rth(j-c) = 1.8 °C/W), low on-state voltage (VTM ≤ 1.6 V @ 80 A), and trade-off between noise immunity and gate sensitivity for compact control circuit design.

Technical Context

The TN4015H-6I is a four-layer p-n-p-n thyristor with gate-controlled turn-on and natural commutation. Its high dV/dt rating (500 V/µs at 150 °C) and low IGT (15 mA) enable reliable triggering under noisy conditions while minimizing driver circuit power. The device sustains 600 V blocking in both directions and supports back-to-back configuration due to full tab insulation.

Thermal performance is defined by Rth(j-c) = 1.8 °C/W and Tj(max) = 150 °C, allowing 40 A RMS conduction at case temperatures up to 82 °C. Static characteristics include VTM ≤ 1.6 V at 80 A, VTO ≤ 0.85 V, and RD ≤ 10 mΩ at 150 °C - confirming low conduction loss in high-current switching applications.

Key Specifications

Pinout & Package

Package: TO-220AB insulated - ceramic-insulated metal tab provides 2500 VRMS isolation between case and semiconductor die, enabling safe mounting to chassis or shared heatsinks without additional insulation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BT139-600E and TYN640, the TN4015H-6I uniquely combines 40 A current handling, 150 °C junction rating, 500 V/µs dV/dt, and 2500 VRMS insulation - making it the only option qualified for high-reliability, space-constrained, thermally demanding SCR applications like motorbike regulators and isolated SSRs.

Availability

TN4015H-6I is available at Aetrix Electronics and suitable for motorbike voltage regulator circuits, inrush current limiting circuits, and solid-state relay designs requiring stable component supply, long-term industrial lifecycle support, and certified insulation performance.

Supply support for TN4015H-6I 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, digital, and mixed-signal ICs, power devices, and microcontrollers for automotive, industrial, and consumer markets.

The TN series SCRs are engineered for high-reliability AC power control in harsh thermal and electrical environments - emphasizing rugged gate triggering, high dV/dt immunity, and extended junction temperature operation.

FAQ

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

The TN4015H-6I supports 40 A RMS on-state current only when the case temperature (Tc) is maintained at ≤82 °C, as specified in Table 2. Exceeding this temperature requires linear derating per Figure 2; at Tc = 101 °C, IT(RMS) drops to 20 A. Thermal design must ensure heatsink interface resistance and ambient conditions sustain this limit.

Can TN4015H-6I be used in AC dimming applications with leading-edge phase control?

Yes - its 500 V/µs dV/dt immunity at 150 °C and 15 mA IGT make it suitable for leading-edge dimmers driving resistive or lightly inductive loads. However, for highly inductive loads (e.g., magnetic transformers), a snubber network is recommended to suppress voltage overshoot during commutation and prevent false triggering.

Is the insulated tab rated for continuous high-voltage potential relative to circuit ground?

Yes - the TO-220AB insulated package is UL 1557 certified (File E81734) with 2500 VRMS isolation between tab and die. This rating applies under continuous AC voltage stress at 50/60 Hz and permits direct mounting to grounded heatsinks in Class I equipment without additional insulation, provided creepage/clearance standards are met per end-equipment requirements.

Does TN4015H-6I support bidirectional AC switching without external components?

No - as a unidirectional SCR, it conducts only from anode to cathode. Bidirectional AC switching requires two TN4015H-6I devices connected in inverse-parallel (back-to-back), leveraging their insulated tabs to avoid shorting. This configuration is explicitly supported in the datasheet and enables full-wave AC control in motor starters and SSRs.