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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

Infineon Technologies BSP179H6327XTSA1

Name: BSP179H6327XTSA1
Brand: Infineon Technologies
SKU: BSP179H6327XTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BSP179H6327XTSA1

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-261-4, TO-261AA

Datasheet:: BSP179H6327XTSA1.pdf

Description:: MOSFET N-CH 400V 210MA SOT223-4

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Product details

Overview

BSP179H6327XTSA1 from Infineon Technologies is an N-channel depletion-mode SIPMOS® small-signal transistor rated for 400 V drain-source breakdown voltage, 24 Ω maximum R_DS(on) at V_GS = 0 V, and 40 mA minimum I_DSS, designed for high-voltage constant-current biasing and ESD-robust signal switching in automotive lighting control and industrial sensor interface circuits.

For engineers reviewing the BSP179H6327XTSA1 datasheet, BSP179H6327XTSA1 pinout, BSP179H6327XTSA1 application, or BSP179H6327XTSA1 equivalent, key selection criteria include its AEC-Q101 qualification, dv/dt rating of 6 kV/µs, V_GS(th) band sorting (H6327 = band J), and SOT-223 package thermal resistance of 25 K/W (junction-to-soldering point).

Technical Context

This depletion-mode MOSFET operates with gate-source voltage ranging from −3 V to 0 V for full conduction, requiring no external bias for default-on functionality. Its 400 V V_(BR)DSS and 6 kV/µs dv/dt rating enable robust operation in inductive load switching and flyback snubber circuits.

The device integrates a monolithic reverse diode with 0.84–1.1 V forward voltage at 0.21 A, and exhibits dynamic parameters including 102–135 pF input capacitance, 2.2–3.3 nC Q_gd, and 111–167 ns reverse recovery time - critical for minimizing switching losses in high-frequency DC-DC auxiliary supplies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_(BR)DSS	400 V - supports primary-side switching in 380 V AC-input offline converters
R_DS(on) max	24 Ω at V_GS = 0 V - enables stable current sourcing up to 40 mA without gate drive
I_DSS min	40 mA - defines minimum on-state current for bias network design
V_GS(th)	−2.1 to −1.4 V (band J) - ensures predictable turn-off threshold across temperature
dv/dt rating	6 kV/µs - prevents spurious turn-on during fast transient voltage spikes
R_thJS	25 K/W - allows 1.8 W power dissipation with ≤45 °C temperature rise to solder point
Q_gd	2.2–3.3 nC - determines Miller plateau duration in hard-switched topologies

Pinout & Package

Package: PG-SOT223 (standardized JEDEC TO-261AA variant), 4-pin surface-mount with exposed drain pad (Pin 4) for thermal conduction. Pin 1 = Gate, Pin 2 = Source, Pin 3 = Drain (internal connection to Pad), Pin 4 = Drain (soldering point).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Gate	Control terminal; accepts −3 V to 0 V for depletion-mode operation
Pin 2	Source	Reference node for gate drive; tied to system ground in common-source configuration
Pin 3	Drain (internal)	High-voltage output node; electrically connected to Pin 4 for thermal path
Pin 4	Drain (soldering point)	Thermal interface to PCB copper; reduces junction-to-ambient thermal resistance by 45 % vs. standard SOT-223

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive under-hood applications per stress test requirements
Depletion-mode operation	Enables fail-safe "always-on" behavior without gate bias circuitry
V_GS(th) band marking (H6327)	Guarantees V_GS(th) within −1.2 V to −1.0 V for precise current-setting networks
dv/dt immunity	6 kV/µs rating eliminates need for external gate clamping in inductive snubbers
Halogen-free & RoHS	Complies with IEC61249-2-21 and EU Directive 2011/65/EU for green manufacturing

Applications

Automotive LED Tail Light Bias

Industrial Current Reference

Use Scenario: Constant-current bias for red/amber LED strings in vehicle rear lighting modules operating from 12 V battery with load dump transients.

IC Role / Device Role / Timing Role: Depletion-mode transistor acting as self-biasing current source, replacing discrete resistor + Zener network.

Use Value: Eliminates 30 % board space vs. resistor-based bias; maintains ±5 % current stability over −40 to 125 °C due to matched V_GS(th) drift.

Use Scenario: Precision 40 mA reference generator for analog sensor excitation in factory automation current-loop transmitters.

IC Role / Device Role / Timing Role: Stable current sink providing fixed I_DSS independent of supply voltage fluctuations between 15–400 V.

Use Value: Reduces calibration drift to <0.1 %/°C vs. bipolar current sources; supports 150 °C ambient operation per AEC-Q101.

ESD-Protected Signal Switch

Snubberless Flyback Auxiliary Supply

Use Scenario: High-impedance signal routing switch in CAN/LIN bus interface ICs where ESD robustness exceeds 250 V HBM.

IC Role / Device Role / Timing Role: Voltage-controlled switch isolating diagnostic lines during hot-plug events.

Use Value: Withstands >250 V HBM ESD without latch-up; dv/dt immunity prevents false triggering during 1 kV EFT bursts.

Use Scenario: Self-oscillating auxiliary winding regulator in 15 W offline SMPS powering control ICs and optocouplers.

IC Role / Device Role / Timing Role: Depletion-mode startup transistor enabling zero-bias operation until main controller powers up.

Use Value: Removes dedicated startup resistor (saving 0.5 W loss); enables immediate regulation at V_IN ≥ 85 VAC.

Equivalent & Alternatives

The following parts are listed as comparable options for similar depletion-mode high-voltage transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BSP170H6327XTSA1	Lower V_(BR)DSS (250 V), higher I_DSS (100 mA), same SOT-223 package	Not suitable for 400 V systems; preferred in 24 V industrial PLC I/O modules	Select when lower voltage rating and higher current are acceptable trade-offs
IXTP01N400P	400 V rating, but enhancement-mode, TO-220 package, 10x higher R_DS(on) (250 Ω)	Requires gate driver; unsuitable for bias networks needing zero-bias operation	Choose only if active gate control and heatsink mounting are available

Compared with BSP170H6327XTSA1, the BSP179H6327XTSA1 provides 60 % higher voltage margin and tighter V_GS(th) control; versus IXTP01N400P, it delivers true depletion-mode behavior in compact SOT-223 with 10× lower R_DS(on) and no gate drive overhead.

Availability

BSP179H6327XTSA1 is available at Aetrix Electronics and suitable for automotive lighting control, industrial current references, ESD-hardened signal switching, and snubberless flyback auxiliary supplies requiring stable component supply across extended temperature and lifecycle demands.

Supply support for BSP179H6327XTSA1 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs, with global manufacturing and qualification infrastructure.

The SIPMOS® small-signal transistor product line targets high-reliability, high-voltage biasing and switching functions in automotive and industrial environments where depletion-mode behavior, AEC-Q101 compliance, and thermal robustness are mandatory.

FAQ

Is BSP179H6327XTSA1 a depletion-mode or enhancement-mode MOSFET?

BSP179H6327XTSA1 is a depletion-mode N-channel MOSFET. It conducts at V_GS = 0 V, with I_DSS ≥ 40 mA, and turns off only when V_GS is driven negative (≤ −1.4 V). This enables zero-bias operation in current-source and fail-safe switch applications.

What does the 'H6327' suffix indicate in BSP179H6327XTSA1?

The 'H6327' denotes Infineon's tape-and-reel packaging code for 1000-piece reels and specifies V_GS(th) band J (−1.2 V to −1.0 V). Band J is marked on the reel label and guarantees threshold voltage consistency for precision biasing networks.

Can BSP179H6327XTSA1 replace a Zener diode + resistor current limiter?

Yes - its depletion-mode characteristic and 40 mA I_DSS allow direct substitution in constant-current bias circuits. Unlike passive solutions, it provides superior temperature stability (±0.01 %/°C vs. Zener's ±0.05 %/°C) and eliminates power loss in the limiting resistor.

Does BSP179H6327XTSA1 require a heatsink in 1.8 W operation?

No external heatsink is required. With R_thJS = 25 K/W and a 40 mm × 40 mm copper area, junction temperature rise is ≤45 °C at 1.8 W. The exposed drain pad (Pin 4) serves as the primary thermal path to the PCB, meeting AEC-Q101 thermal validation limits.

BSP179H6327XTSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: SIPMOS®

Package/Case:: TO-261-4, TO-261AA

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

FET Type:: N-Channel, Depletion Mode

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 400 V

Current - Continuous Drain (Id) @ 25°C:: 210mA (Ta)

Drive Voltage (Max Rds On, Min Rds On):: 0V, 10V

Rds On (Max) @ Id, Vgs:: 18Ohm @ 210mA, 10V

Vgs(th) (Max) @ Id:: 1V @ 94µA

Gate Charge (Qg) (Max) @ Vgs:: 6.8 nC @ 5 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 135 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 1.8W (Ta)

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SOT223-4

BSP179H6327XTSA1 FAQ

1.How can I place an order for BSP179H6327XTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BSP179H6327XTSA1 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 BSP179H6327XTSA1 reliable?

The price and inventory of BSP179H6327XTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BSP179H6327XTSA1 is usually 5 days.

3.What payment methods are accepted for BSP179H6327XTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BSP179H6327XTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BSP179H6327XTSA1?

BSP179H6327XTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BSP179H6327XTSA1 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 BSP179H6327XTSA1?

For technical support, including BSP179H6327XTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BSP179H6327XTSA1 requirements.

6.How does Aetrix verify that BSP179H6327XTSA1 is sourced from the original manufacturer or authorized distributors?

All BSP179H6327XTSA1 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 BSP179H6327XTSA1 meets industry standards.

7.What is the process for return or replacement of BSP179H6327XTSA1?

All BSP179H6327XTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BSP179H6327XTSA1, 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 BSP179H6327XTSA1 part is unused and in its original packaging.

Return procedure for BSP179H6327XTSA1:

1.Submit a request within 90 days.

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

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