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

STMicroelectronics STGD25N40LZAG

Name: STGD25N40LZAG
Brand: STMicroelectronics
SKU: STGD25N40LZAG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STGD25N40LZAG

Manufacturer:: STMicroelectronics

Category:: Single IGBTs

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: STGD25N40LZAG.pdf

Description:: POWER TRANSISTORS

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Product details

Overview

STGD25N40LZAG from STMicroelectronics is an AEC-Q101-qualified automotive-grade 400 V internally clamped IGBT in DPAK (TO-252) package, 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 120 Ω gate resistor and 11–22 kΩ gate-emitter resistor - eliminating external protection circuitry in harsh automotive environments.

For engineers reviewing the STGD25N40LZAG datasheet, STGD25N40LZAG pinout, STGD25N40LZAG application, or STGD25N40LZAG equivalent, key selection criteria include clamped V_CE stability across -40 °C to 175 °C, logic-level gate drive compatibility (V_GE(th) = 1.3–2.1 V), low V_CE(sat) (1.1–1.55 V), ESD-protected gate input (4 kV HBM), and thermal resistance of 100 °C/W (junction-to-ambient).

Technical Context

This IGBT employs ST's PowerMESH technology with built-in gate-collector high-voltage clamping and ESD-protected logic-level gate input. Its internal R_G (120 Ω) and R_GE (11–22 kΩ) enable direct microcontroller interfacing without external gate network components.

The device operates under strict automotive thermal constraints: junction temperature range is -40 °C to 175 °C, with self-clamping inductive switching energy de-rated to 180 mJ at T_J = 150 °C. Dynamic performance includes t_d(off) = 8.4 μs and dV/dt = 165 V/μs under 300 V, 10 A inductive load conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CES(clamped)	400 V - Internally clamped collector-emitter voltage ensures safe operation during inductive turn-off without external snubber.
V_CE(sat)	1.1–1.55 V - Low saturation voltage minimizes conduction loss in high-current ignition pulse applications.
I_C Continuous	25 A @ T_C = 25 °C - Sustains full rated current with adequate heatsinking in engine bay ambient conditions.
E_SCIS	320 mJ @ T_J = 25 °C - High self-clamping energy enables robust coil discharge without external clamp diodes.
R_th(j-amb)	100 °C/W - Thermal resistance defines required PCB copper area and airflow for thermal management in DPAK mounting.
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.
ESD Rating	4 kV HBM - Integrated gate protection eliminates need for external TVS on gate line in automotive ECU designs.

Pinout & Package

STGD25N40LZAG is housed in a surface-mount DPAK (TO-252) package with exposed drain tab for thermal and electrical connection. The package complies with ECOPACK environmental standards and supports tape-and-reel automated assembly (2500 pcs/reel).

Pin/Terminal	Circuit Role	Design Meaning
1 (G)	Gate	Logic-level input terminal; integrated 120 Ω series resistor enables direct MCU drive and reduces ringing.
2 (C / TAB)	Collector / Drain Tab	High-current output node; electrically connected to exposed metal tab for low-inductance, high-power routing and thermal dissipation.
3 (E)	Emitter	Reference return path for load current; tied to system ground in typical ignition coil driver topology.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock per JESD47.
Integrated gate resistor (R_G)	120 Ω on-chip resistor suppresses gate oscillation and simplifies layout in high-dV/dt ignition switching.
Integrated gate-emitter resistor (R_GE)	11–22 kΩ internal pull-down ensures defined gate state during power-up/down and prevents false turn-on.
Self-clamping inductive switching	Eliminates external clamp diode by sustaining 400 V clamped V_CE during coil energy release.
Low V_CE(sat) over wide T_J	1.25 V @ 10 A, 175 °C ensures stable power loss and predictable thermal rise in sustained firing events.

Applications

Ignition Coil Driver

Engine Control Unit (ECU) Output Stage

Use Scenario: Driving primary winding of gasoline engine ignition coils in distributorless ignition systems (DIS).

IC Role / Device Role / Timing Role: High-speed, high-energy switch controlling 300–400 V coil charge/discharge cycles synchronized to crankshaft position.

Use Value: 320 mJ SCIS energy and 400 V clamping allow reliable spark generation without external snubbers, reducing BOM count and board space.

Use Scenario: Final output stage in automotive ECU modules managing multiple cylinder ignition timing.

IC Role / Device Role / Timing Role: Logic-level driven power switch interfacing directly with MCU PWM outputs to control coil dwell time and spark advance.

Use Value: V_GE(th) = 1.3–2.1 V and integrated R_G/R_GE eliminate gate driver ICs, enabling compact, cost-effective multi-channel designs.

Start-Stop System Ignition

Two-Wheel Vehicle Ignition Module

Use Scenario: Enabling rapid re-ignition during engine restart in 12 V start-stop systems with frequent cold cranking.

IC Role / Device Role / Timing Role: Robust switching element handling repeated high-current pulses under elevated ambient temperatures (>105 °C).

Use Value: 175 °C max junction temperature and 180 mJ SCIS @ T_J = 150 °C ensure reliability during aggressive stop-start duty cycles.

Use Scenario: Compact ignition module for motorcycles and scooters where space, weight, and thermal constraints are critical.

IC Role / Device Role / Timing Role: Surface-mount IGBT replacing through-hole alternatives to reduce footprint and improve manufacturability.

Use Value: DPAK package with 100 °C/W R_th(j-amb) enables natural convection cooling on small PCBs without dedicated heatsinks.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STGB25N40LZAG	D²PAK (TO-263) package; lower R_th(j-case) = 1 °C/W vs. 100 °C/W (j-amb); same electrical specs.	Better thermal performance for high-duty-cycle or forced-air-cooled designs; larger footprint and higher assembly cost.	Select when thermal margin is constrained and PCB space permits larger package.
INFINEON IKP20N60T6	600 V rating, higher V_CE(sat) = 1.6 V @ 10 A, no integrated R_G/R_GE, requires external gate network.	Broader voltage headroom but increased design complexity and component count for 400 V coil systems.	Select only if system requires >450 V blocking or legacy gate driver architecture is already in place.

Compared with STGB25N40LZAG, the DPAK version offers superior manufacturability and cost efficiency in space-constrained ECUs, while INFINEON IKP20N60T6 trades integration for voltage scalability - making STGD25N40LZAG optimal for cost-sensitive, high-volume 12 V automotive ignition modules.

Availability

STGD25N40LZAG is available at Aetrix Electronics and suitable for automotive ignition systems, engine control units, and two-wheel vehicle electronics requiring stable component supply, AEC-Q101 compliance, and long-term lifecycle support.

Supply support for STGD25N40LZAG 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 automotive, industrial, and consumer markets.

This IGBT belongs to ST's Automotive Power portfolio, engineered specifically for high-reliability, high-energy switching in engine management systems - emphasizing ruggedness, integration, and AEC-Q101 validation from wafer to final test.

FAQ

Is STGD25N40LZAG pin-compatible with STGB25N40LZAG?

No - STGD25N40LZAG uses a 3-pin DPAK (TO-252) package with pinout G-C-E, while STGB25N40LZAG uses a 3-pin D²PAK (TO-263) package with identical pin function order but different mechanical footprint and thermal pad layout. PCB redesign is required for substitution.

What is the maximum recommended gate drive voltage for reliable operation?

The absolute maximum V_GE is ±20 V, but ST specifies V_GE = 4–5 V for normal logic-level operation. Gate clamping occurs at 12–16 V (V_GE(clamped)), so driving above 5 V provides no benefit and risks accelerated gate oxide stress under transient conditions.

Does the integrated R_GE eliminate the need for an external gate pull-down resistor?

Yes - the on-die 11–22 kΩ R_GE provides sufficient gate-emitter bias to prevent spurious turn-on during power sequencing or noise events, removing the requirement for an external resistor in standard ignition driver layouts per ST's application guidance.

Can STGD25N40LZAG be used in non-automotive 400 V inductive switching applications?

Yes - its 400 V clamping, 320 mJ SCIS, and -40 °C to 175 °C operating range make it suitable for industrial solenoid drivers, capacitor discharge ignition (CDI) systems, and other high-energy inductive loads, though AEC-Q101 qualification adds assurance rather than functional limitation.

STGD25N40LZAG Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

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:: 125 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-252 (DPAK)

STGD25N40LZAG FAQ

1.How can I place an order for STGD25N40LZAG through Aetrix?

Please submit a Request for Quotation (RFQ) for STGD25N40LZAG 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 STGD25N40LZAG reliable?

The price and inventory of STGD25N40LZAG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STGD25N40LZAG is usually 5 days.

3.What payment methods are accepted for STGD25N40LZAG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STGD25N40LZAG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STGD25N40LZAG?

STGD25N40LZAG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STGD25N40LZAG 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 STGD25N40LZAG?

For technical support, including STGD25N40LZAG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STGD25N40LZAG requirements.

6.How does Aetrix verify that STGD25N40LZAG is sourced from the original manufacturer or authorized distributors?

All STGD25N40LZAG 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 STGD25N40LZAG meets industry standards.

7.What is the process for return or replacement of STGD25N40LZAG?

All STGD25N40LZAG units undergo pre-shipment inspection (PSI). If there is an issue with STGD25N40LZAG, 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 STGD25N40LZAG part is unused and in its original packaging.

Return procedure for STGD25N40LZAG:

1.Submit a request within 90 days.

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

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