STMicroelectronics STE45NK80ZD

Overview

STE45NK80ZD from STMicroelectronics is an N-channel 800 V, 0.11 Ω (typ), 45 A SuperFREDmesh™ high-voltage power MOSFET in ISOTOP package, designed for hard-switched and resonant-mode SMPS, PFC stages, and industrial motor drives requiring robust avalanche capability and high dv/dt immunity.

For engineers reviewing the STE45NK80ZD datasheet, STE45NK80ZD pinout, STE45NK80ZD application, or STE45NK80ZD equivalent, key selection criteria include its 800 V V_DSS, 1.2 J single-pulse avalanche energy, 8 V/ns peak diode recovery dv/dt, 7 kV HBM ESD rating, and integrated gate-source Zener protection-critical for high-reliability offline power conversion.

Technical Context

This device employs ST's optimized strip-based PowerMESH™ layout enhanced as SuperFREDmesh™ to simultaneously reduce R_DS(on) and improve dynamic ruggedness. Its intrinsic capacitances are minimized (C_iss = 26 nF, C_oss = 1.62 nF) and dv/dt capability is validated at 8 V/ns under specified di/dt and V_DD conditions.

The integrated back-to-back gate-source Zener diodes provide 30 V breakdown protection without external components, while the source-drain diode exhibits fast reverse recovery (t_rr = 375 ns @ T_j = 25°C) and low Q_rr (4.65 µC), supporting efficient hard-switched topologies.

Key Specifications

Pinout & Package

STE45NK80ZD uses the ISOTOP package-a 4-terminal, isolated, through-hole power package with electrically insulated metal baseplate (V_ISO = 2500 V_RMS). The terminals are arranged linearly: Drain (D), Source (S), Gate (G), and second Source (S2), where S and S2 are internally connected and intended for low-inductance source return routing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STW45NK80Z and IPP60R120P7XKSA1, STE45NK80ZD uniquely combines 800 V rating, dual-source terminals, integrated Zener, and 0.20 °C/W thermal resistance in ISOTOP-making it optimal for space-constrained, high-ruggedness industrial power stages where layout-induced dv/dt stress and avalanche reliability are critical.

Availability

STE45NK80ZD is available at Aetrix Electronics and suitable for industrial switch-mode power supplies, active PFC front-ends, and motor drive inverters requiring stable component supply and long-term design continuity.

Supply support for STE45NK80ZD 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 microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The SuperFREDmesh™ product line targets high-voltage, high-efficiency power conversion-specifically engineered for offline SMPS, PFC, and motor control applications demanding superior avalanche ruggedness and dynamic stability.

FAQ

What is the maximum continuous drain current at 100°C case temperature?

The STE45NK80ZD supports 28 A continuous drain current at T_C = 100°C, as specified in Table 1 of the datasheet. This derating reflects thermal limits of the ISOTOP package and must be applied in thermal design when ambient or heatsink conditions elevate case temperature beyond 25°C.

Does STE45NK80ZD require an external gate resistor for safe operation?

Yes-while the device integrates gate-source Zener protection, a gate resistor (e.g., 4.7 Ω as used in the datasheet's switching test circuit) is required to control dV/dt, limit peak gate current, and damp ringing. The recommended value balances switching speed against EMI and shoot-through risk in bridge configurations.

Can STE45NK80ZD replace IGBTs in motor drive inverters?

Yes-in 600–800 V DC-link inverters up to ~5 kW, STE45NK80ZD can replace discrete IGBTs due to its 45 A continuous rating, 600 W power dissipation, and robust avalanche capability. However, its higher gate charge (558 nC) demands stronger gate drivers compared to typical IGBTs.

Is the ISOTOP package electrically isolated, and what is its isolation rating?

Yes-the ISOTOP package provides reinforced electrical isolation between all four terminals and the external heatsink, rated at 2500 V_RMS AC for 1 minute per Table 1. This enables direct mounting onto grounded heatsinks without insulating pads in many industrial applications.