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Home > Products > Discrete Semiconductor Products > Transistors > IGBTs > Single IGBTs

STMicroelectronics STGB25N40LZAG

Name: STGB25N40LZAG
Brand: STMicroelectronics
SKU: STGB25N40LZAG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STGB25N40LZAG

Manufacturer:: STMicroelectronics

Category:: Single IGBTs

Package:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Datasheet:: STGB25N40LZAG.pdf

Description:: IGBT 435V 25A TO263

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Product details

Overview

STGB25N40LZAG from STMicroelectronics is an AEC-Q101-qualified automotive-grade 400 V internally clamped IGBT optimized for ignition coil driver circuits. It delivers 25 A continuous collector current at T_C = 25 °C, 320 mJ self-clamping inductive switching energy at T_J = 25 °C, and features integrated 12–16 kΩ gate-emitter resistor (R_GE) and 120 Ω gate resistor (R_G). Its logic-level gate drive (V_GE(th) = 1.3–2.1 V) and ESD-protected input enable direct microcontroller interfacing in engine control units.

For engineers reviewing the STGB25N40LZAG datasheet, STGB25N40LZAG pinout, STGB25N40LZAG application, or STGB25N40LZAG equivalent, key selection criteria include clamped V_CE(sat) stability over -40 to 175 °C, SCIS energy margin under pulsed inductive loads, gate-resistor integration eliminating external protection, and D²PAK thermal resistance of 1 °C/W for high-power ignition pulse handling.

Technical Context

This IGBT employs ST's PowerMESH technology with built-in gate-collector voltage clamping and ESD protection on both gate and emitter terminals. Its internal R_GE (11–22 kΩ) and R_G (120 Ω) suppress oscillation and reduce layout sensitivity in high-dV/dt ignition environments.

The device operates with a low V_CE(sat) of 1.1–1.55 V across T_J = -40 to 175 °C and IC = 6–10 A, enabling efficient energy transfer during spark generation. Its dV/dt immunity reaches 165 V/μs at T_J = 25 °C, critical for reliable operation in noisy engine bays.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CES(clamped)	400 V - Internally clamped collector-emitter breakdown enables safe inductive turn-off without external snubber in 12 V/24 V automotive systems.
I_C (continuous)	25 A @ T_C = 25 °C - Sustains full coil charging current without derating at typical heatsink temperatures.
E_SCIS	320 mJ @ T_J = 25 °C - Confirmed energy-handling capability during worst-case inductive switching events in ignition coils.
V_CE(sat)	1.25 V @ V_GE = 4.5 V, I_C = 10 A, T_J = 175 °C - Low conduction loss ensures minimal thermal stress during repeated spark pulses.
R_thj-case	1 °C/W - Enables high power dissipation (150 W) with compact thermal design in D²PAK package.
Q_g	26 nC - Optimized gate charge supports fast, low-loss switching at typical ignition frequencies (50–200 Hz).
V_GE(th)	1.3–2.1 V - Logic-level threshold allows direct drive from 3.3 V or 5 V MCU GPIO without level-shifting.

Pinout & Package

D²PAK (TO-263) package with exposed drain tab for thermal and electrical connection; 3-pin configuration with isolated gate terminal.

Pin/Terminal	Circuit Role	Design Meaning
1 (G)	Gate	Logic-level input terminal with integrated ESD protection and 120 Ω series resistance - eliminates need for external gate resistor.
2 (C / TAB)	Collector / Drain Tab	High-current output node connected to exposed metal tab - requires thermal interface to heatsink and serves as primary current return path.
3 (E)	Emitter	Reference node for gate drive and load return; includes integrated 11–22 kΩ gate-emitter resistor for bias stabilization and noise immunity.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock per JESD47.
Integrated R_GE and R_G	Eliminates two external components and associated PCB area while improving layout robustness against parasitic oscillation.
Self-clamping inductive switching	Guarantees safe turn-off up to 320 mJ without external clamp diodes - reduces BOM cost and failure modes in coil drivers.
ESD-protected gate-emitter	HBM 4 kV and CDM 2 kV rating prevents field-induced damage during assembly and system integration.
Wide T_J range	Rated operation from -40 to 175 °C - supports placement near hot engine blocks without derating or thermal throttling.

Applications

Gasoline Engine Ignition Coil Driver

Diesel Pre-heat Glow Plug Controller

Use Scenario: High-voltage spark generation in distributorless ignition systems (DIS) with coil-on-plug (COP) architecture.

IC Role / Device Role / Timing Role: Primary switch controlling primary winding current in 12 V automotive battery-fed ignition coils.

Use Value: 320 mJ SCIS energy and 400 V clamping ensure reliable spark delivery even under cold-cranking low-battery conditions (6.5 V).

Use Scenario: PWM-controlled pre-heating of diesel glow plugs during cold-start sequences.

IC Role / Device Role / Timing Role: High-current, thermally robust switch delivering up to 25 A for 10–30 s durations.

Use Value: 1 °C/W R_thj-case and 150 W P_TOT allow sustained conduction without active cooling in confined ECU enclosures.

Electric Power Steering (EPS) Motor Phase Switch

Onboard Charger (OBC) DC-DC Isolation Stage

Use Scenario: High-side switching in three-phase EPS motor inverters requiring robust short-circuit immunity.

IC Role / Device Role / Timing Role: Fault-tolerant phase leg switch with integrated gate protection and fast turn-off (t_f = 5.5 μs).

Use Value: 165 V/μs dV/dt rating and 175 °C max junction temperature support operation in vibration-prone steering columns.

Use Scenario: Secondary-side synchronous rectification or isolation switch in bidirectional OBC DC-DC converters.

IC Role / Device Role / Timing Role: Clamped IGBT replacing MOSFETs in 400 V output stages where avalanche ruggedness is required.

Use Value: V_CE(sat) < 1.55 V at 175 °C enables >97% efficiency at full load while maintaining SOA integrity during transient overloads.

Equivalent & Alternatives

The following parts are listed as comparable options for similar IGBT ignition driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STGD25N40LZAG	DPAK (TO-252) package; R_thj-case = 62.5 °C/W; same electrical specs but lower thermal performance.	Suitable for lower-duty-cycle or space-constrained modules where heatsinking is limited.	Select when board-level thermal management favors surface-mount footprint over D²PAK's higher power density.
Infineon IGW25N40T	400 V, 25 A; no integrated R_GE; requires external gate-emitter resistor and TVS for ESD.	Requires additional protection components and layout validation for automotive ESD compliance.	Choose only if legacy design reuse or second-source qualification mandates Infineon footprint compatibility.

Compared with STGD25N40LZAG and IGW25N40T, STGB25N40LZAG uniquely combines D²PAK thermal performance, integrated gate resistors, and AEC-Q101-verified SCIS energy - reducing component count and qualification effort for new ignition designs.

Availability

STGB25N40LZAG is available at Aetrix Electronics and suitable for automotive ignition systems, diesel pre-heat controllers, and electric power steering motor drives requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STGB25N40LZAG 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 automotive, industrial, and power discrete technologies with vertical manufacturing capabilities.

This device belongs to ST's Automotive Power Discrete portfolio, engineered specifically for high-reliability, high-energy switching in engine management and electrified vehicle subsystems.

FAQ

Is STGB25N40LZAG pin-compatible with STGD25N40LZAG?

No - STGB25N40LZAG uses D²PAK (TO-263) with 3-pin layout and exposed drain tab, while STGD25N40LZAG uses DPAK (TO-252) with different lead pitch and thermal pad geometry. PCB footprints and thermal mounting are not interchangeable despite identical pin function mapping (G/C/E).

What is the maximum gate-emitter voltage this IGBT can withstand?

The absolute maximum V_GE is ±20 V, with clamped V_GE(clamped) specified at 12–16 V under ±2 mA test current across -40 to 175 °C. This clamping protects against transients without external Zener diodes.

Can this IGBT replace a MOSFET in an existing ignition coil driver?

Yes, with circuit review: its 1.25 V V_CE(sat) at 10 A is lower than most 400 V automotive MOSFETs, but gate drive must be adjusted for IGBT's higher Q_g (26 nC) and absence of body diode reverse recovery. Layout must accommodate D²PAK thermal requirements.

Does STGB25N40LZAG require external gate protection in automotive environments?

No - it integrates ESD protection (HBM 4 kV), gate-emitter clamping (12–16 V), and 120 Ω gate resistor. These features eliminate external TVS diodes, gate resistors, and RC snubbers required by standard IGBTs in ISO 16750-compliant designs.

STGB25N40LZAG Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Packaging:: Tape & Reel (TR)

Product Status:: Active

IGBT Type:: -

Voltage - Collector Emitter Breakdown (Max):: 435 V

Current - Collector (Ic) (Max):: 25 A

Current - Collector Pulsed (Icm):: 50 A

Vce(on) (Max) @ Vge, Ic:: 1.25V @ 4V, 6A

Power - Max:: 150 W

Switching Energy:: -

Input Type:: Logic

Gate Charge:: 26 nC

Td (on/off) @ 25°C:: 1.1µs/4.6µs

Test Condition:: 300V, 10A, 1kOhm, 5V

Reverse Recovery Time (trr):: -

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-263 (D2PAK)

STGB25N40LZAG FAQ

1.How can I place an order for STGB25N40LZAG through Aetrix?

Please submit a Request for Quotation (RFQ) for STGB25N40LZAG on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STGB25N40LZAG reliable?

The price and inventory of STGB25N40LZAG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STGB25N40LZAG is usually 5 days.

3.What payment methods are accepted for STGB25N40LZAG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STGB25N40LZAG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STGB25N40LZAG?

STGB25N40LZAG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STGB25N40LZAG order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STGB25N40LZAG?

For technical support, including STGB25N40LZAG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STGB25N40LZAG requirements.

6.How does Aetrix verify that STGB25N40LZAG is sourced from the original manufacturer or authorized distributors?

All STGB25N40LZAG products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STGB25N40LZAG meets industry standards.

7.What is the process for return or replacement of STGB25N40LZAG?

All STGB25N40LZAG units undergo pre-shipment inspection (PSI). If there is an issue with STGB25N40LZAG, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STGB25N40LZAG part is unused and in its original packaging.

Return procedure for STGB25N40LZAG:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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