STMicroelectronics STP22NS25Z

Overview

STP22NS25Z from STMicroelectronics is an N-channel enhancement-mode power MOSFET with 250 V V_DSS, 0.13 Ω R_DS(on) at V_GS = 10 V, 22 A continuous drain current at T_C = 25°C, Zener-protected gate, and TO-220 package. It delivers high dv/dt immunity (5 V/ns), 100% avalanche tested performance, and is engineered for robust switching in lighting ballasts and industrial AC-DC converters.

For engineers reviewing the STP22NS25Z datasheet, STP22NS25Z pinout, STP22NS25Z application, or STP22NS25Z equivalent, key selection criteria include its 250 V blocking capability, low on-resistance under 0.15 Ω, integrated gate-source Zener protection (20 V), 135 W power dissipation, and suitability for hard-switched inductive loads requiring reliable unclamped inductive switching (UIS) performance.

Technical Context

This MOSFET employs ST's proprietary MESH OVERLAY™ process and STrip layout architecture to achieve superior breakdown uniformity and edge termination robustness. Its 250 V V_DSS rating and 350 mJ single-pulse avalanche energy (E_AS) enable operation in high-voltage flyback and resonant converter topologies without external snubbers.

The device integrates back-to-back gate-source Zener diodes (BVGSO = 20 V) to suppress transients and enhance ESD tolerance (2500 V HBM). Its dynamic parameters - including 108 nC total gate charge, 2400 pF input capacitance, and 292 ns reverse recovery time - are optimized for moderate-frequency (≤100 kHz) switching with controlled turn-on/turn-off timing (t_d(on) = 20 ns, t_d(Voff) = 100 ns).

Key Specifications

Pinout & Package

STP22NS25Z uses a 3-pin TO-220 package with isolated tab (drain-connected). The case is electrically connected to the drain terminal, requiring insulating hardware when mounted to grounded heatsinks.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IRFP250NPbF and IXTH24N25L, STP22NS25Z uniquely combines 250 V rating, Zener-protected gate, and 100% avalanche testing - enabling simplified design, reduced BOM count, and guaranteed ruggedness in lighting and industrial switching without external protection components.

Availability

STP22NS25Z is available at Aetrix Electronics and suitable for fluorescent electronic ballasts, industrial AC-DC power supplies, and UPS inverter stages requiring stable component supply and long-term production continuity.

Supply support for STP22NS25Z 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, specializing in power management, analog, microcontrollers, and automotive ICs.

STP22NS25Z belongs to ST's MESH OVERLAY™ high-voltage power MOSFET product line, designed specifically for rugged, high-efficiency switching in lighting, industrial power conversion, and motor control applications demanding high avalanche capability and transient immunity.

FAQ

Is STP22NS25Z pin-compatible with STB22NS25Z?

Yes - STP22NS25Z (TO-220) and STB22NS25Z (D²PAK) share identical electrical specifications and pinout assignment (G-S-D), but differ in package thermal and mechanical properties. TO-220 offers lower R_thj-case (0.93 °C/W vs. 1.25 °C/W for D²PAK) and requires insulated mounting, while D²PAK supports surface-mount assembly and higher power density.

What is the maximum safe operating temperature for continuous operation?

The absolute maximum junction temperature is 150°C, but continuous operation at full 22 A drain current requires case temperature ≤25°C per datasheet ratings. At T_C = 100°C, the derated continuous current is 13.9 A. Thermal design must ensure R_thj-amb ≤ 62.5 °C/W with adequate heatsinking and airflow.

Does STP22NS25Z require a gate resistor for stability?

Yes - a gate resistor (typically 4.7 Ω, as used in datasheet switching tests) is required to dampen gate oscillation and control dV/dt-induced Miller current. Omitting it risks parasitic turn-on, increased switching losses, and potential gate oxide damage due to ringing exceeding ±20 V rating.

Can STP22NS25Z replace older STP22NE06L devices in existing designs?

No - STP22NE06L is a 60 V, 22 A logic-level MOSFET with different gate threshold (1–2.5 V) and R_DS(on) (0.05 Ω). STP22NS25Z has higher V_GS(th) (2–4 V), higher R_DS(on), and 250 V rating; substituting it would cause insufficient turn-on and excessive conduction loss in 12–24 V systems.