STMicroelectronics STP08IE120F4

Overview

STP08IE120F4 from STMicroelectronics is an Emitter-Switched Bipolar Transistor (ESBT®) in TO-220FP-4L package, rated for 1200 V collector-source voltage, 8 A continuous collector current, and 0.10 Ω equivalent on-resistance. It delivers fast switching up to 150 kHz with low C_iss (550 pF at V_CS = 25 V) and squared RBSOA up to 1200 V, targeting auxiliary SMPS in three-phase mains systems.

For engineers reviewing the STP08IE120F4 datasheet, STP08IE120F4 pinout, STP08IE120F4 application, or STP08IE120F4 equivalent, key selection criteria include its cascode configuration, gate-driven topology compatibility, dynamic voltage clamping (V_CSW = 1200 V), low turn-off crossover time (10.2 ns at I_C = 4 A), and thermal resistance (R_thj-case ≤ 6 °C/W).

Technical Context

The STP08IE120F4 integrates a high-voltage bipolar transistor and a low-voltage MOSFET in monolithic cascode configuration, enabling gate-driven control of 1200 V circuits without isolated drivers. Its V_CS(ON) = 0.8 V at I_C = 8 A and V_GS = 10 V ensures low conduction loss, while h_FE = 5–7 supports stable base current drive.

It features squared reverse-biased safe operating area (RBSOA) up to 1200 V and exhibits low dynamic collector-source voltage (V_CS(dyn) = 3.35 V at 1 µs) under inductive switching with R_G = 47 Ω, confirming robustness in hard-switched topologies.

Key Specifications

Pinout & Package

STP08IE120F4 uses the TO-220FP-4L package: insulated flange, 4-pin vertical mounting, lead-free ECOPACK® compliant, with mechanical dimensions per ST doc 7514291B (A = 4.3–4.7 mm, D = 15.5–15.9 mm, E = 9.8–10.2 mm, e = 2.29–2.79 mm, L2 = 15.4–15.8 mm).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage cascode switch applications.

Compared with STGP10NC60KD and IXTH12N100L, the STP08IE120F4 uniquely combines 1200 V blocking, cascode-integrated drive, and sub-15 ns switching-enabling compact, snubberless auxiliary SMPS designs where both voltage headroom and high-frequency efficiency are mandatory.

Availability

STP08IE120F4 is available at Aetrix Electronics and suitable for auxiliary SMPS for three-phase mains, industrial motor drive gate supply, high-frequency induction heating inverter stage, and telecom rectifier hold-up circuit requiring stable component supply and long-term BOM continuity.

Supply support for STP08IE120F4 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, designing and manufacturing analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.

The ESBT® product line targets high-efficiency, high-frequency power conversion in voltage ranges beyond 600 V, specifically addressing gate-driven topologies where IGBTs suffer from tail current and Si-MOSFETs lack sufficient voltage rating or SOA.

FAQ

What is the recommended gate resistor value for optimal switching performance?

The datasheet specifies R_G = 47 Ω for characterization of t_s, t_f, and V_CS(dyn). This value balances switching speed and gate oscillation risk. Lower values (e.g., 22 Ω) reduce t_f further but increase peak gate current and EMI; higher values (>100 Ω) suppress ringing but degrade efficiency at 150 kHz. Layout-dependent parasitic inductance must be minimized regardless of R_G choice.

Does STP08IE120F4 require negative gate voltage for turn-off?

No. The device turns off fully with V_GS = 0 V, as confirmed by I_CS(SS) ≤ 100 µA at V_CS = 1200 V and V_GS = 0 V. Negative gate bias is not required for reliable blocking, though it may marginally improve dv/dt immunity in noisy environments. The ±17 V V_GS rating permits optional negative bias if system-level noise justifies added driver complexity.

Can STP08IE120F4 replace a discrete IGBT + MOSFET cascode?

Yes-monolithic integration eliminates layout-dependent timing skew and parasitic inductance between devices. Unlike discrete cascodes, STP08IE120F4 guarantees matched thermal coupling and intrinsic current sharing, enabling direct substitution in existing flyback/forward converters without re-layout. However, pinout differs: discrete solutions use separate emitter/base/gate connections, whereas STP08IE120F4 consolidates base and source into Pin 4.

Is STP08IE120F4 suitable for automotive applications?

No. ST explicitly states in the preliminary datasheet that this product is not recommended, authorized, or warranted for automotive, aerospace, life-saving, or safety-critical applications. It lacks AEC-Q101 qualification, automotive-grade temperature screening, and failure-in-time (FIT) data. Use only in industrial, telecom, or general-purpose power supplies where functional safety is not mandated.