STMicroelectronics STC03DE170HV

Overview

STC03DE170HV from STMicroelectronics is a hybrid emitter-switched bipolar transistor (ESBT®) designed for high-voltage auxiliary flyback SMPS in three-phase mains systems. It delivers 1700 V collector-source blocking voltage, 3 A continuous collector current, 0.33 Ω typical on-resistance, 100 ns storage time at 3 A, and operates up to 150 kHz switching frequency.

For engineers reviewing the STC03DE170HV datasheet, STC03DE170HV pinout, STC03DE170HV application, or STC03DE170HV equivalent, key selection criteria include RBSOA performance at 1700 V, gate-driven dynamic voltage (9.5 V @ 500 ns), CISS of 750 pF with 47 Ω gate resistor, and TO-247-4L HV package thermal resistance of 1 °C/W.

Technical Context

The STC03DE170HV integrates a high-voltage bipolar transistor and low-voltage MOSFET in a single hybrid die to achieve squared reverse-biased safe operating area (RBSOA) up to 1700 V and fast switching with controlled tail current. Its ESBT topology eliminates minority-carrier storage delay while retaining high-voltage ruggedness.

It uses base-emitter control via an integrated MOSFET driver stage, enabling gate-controlled turn-on/turn-off with VGS(th) = 1.5–3 V and hFE = 5–14 at IC = 1–3 A. Dynamic voltage clamping is supported up to 1360 V with RG = 47 Ω, and it sustains 1700 V switched without snubber under defined inductive load conditions.

Key Specifications

Pinout & Package

STC03DE170HV is housed in a TO-247-4L HV package with 4 terminals: Collector (pin 1), Gate (pin 2), Emitter (pin 3), and Base (pin 4). The package features enhanced creepage/clearance for 1700 V isolation and lead-free ECOPACK® compliance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage auxiliary SMPS applications.

Compared with STGW30H65DFB and IXTH3N170, STC03DE170HV uniquely combines 1700 V unclamped switching, 0.33 Ω conduction, and MOSFET-compatible gate drive in a single TO-247-4L package-enabling simpler, more robust auxiliary SMPS designs for three-phase industrial equipment.

Availability

STC03DE170HV is available at Aetrix Electronics and suitable for industrial motor drives, UPS auxiliary power supplies, energy metering gate drivers, and EV charging station control power requiring stable component supply and long-term manufacturability.

Supply support for STC03DE170HV 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 for automotive, industrial, and power applications.

The STC03DE170HV belongs to ST's ESBT® high-voltage power transistor family, engineered specifically for compact, efficient, and snubberless auxiliary SMPS in three-phase industrial systems.

FAQ

What is the maximum recommended gate resistor value for reliable switching?

The datasheet specifies 47 Ω as the test condition for dynamic parameters (t_s, t_f, V_CS(dyn)). Using >47 Ω increases storage time and dynamic voltage overshoot; values below 22 Ω risk excessive peak gate current (>3 A) and MOSFET driver stress. For 150 kHz operation, 33–47 Ω is optimal.

Does STC03DE170HV require a negative gate voltage for turn-off?

No. Unlike SiC MOSFETs or some high-speed IGBTs, STC03DE170HV uses a hybrid ESBT structure where the MOSFET gate controls the bipolar base. Turn-off is achieved by pulling the gate to 0 V (not negative); the specified V_GS range is ±20 V, but only 0 to +10 V is used in normal operation.

Can STC03DE170HV replace a standard IGBT in existing flyback designs?

Yes, but with gate drive and layout adjustments. It offers lower V_CE(sat) and faster switching than comparable 1700 V IGBTs, but requires attention to base-emitter loop inductance and gate resistor placement due to its dual-stage internal structure. Layout must minimize parasitic inductance in pins 2 (Gate) and 4 (Base).

Is the TO-247-4L HV package compatible with standard TO-247 heatsinks?

Yes-the TO-247-4L HV has identical mechanical footprint and mounting hole pattern as standard TO-247 packages. However, its enhanced creepage distance (≥8 mm between collector and gate/emitter) requires verification of heatsink insulation and standoff height to maintain 1700 V working voltage clearance per IEC 60664-1.