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

Infineon Technologies BSP125L6327HTSA1

Name: BSP125L6327HTSA1
Brand: Infineon Technologies
SKU: BSP125L6327HTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BSP125L6327HTSA1

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

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

Datasheet:: BSP125L6327HTSA1.pdf

Description:: MOSFET N-CH 600V 120MA SOT223-4

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BSP125L6327HTSA1 from Infineon Technologies is an N-channel enhancement-mode small-signal MOSFET in SOT-23 package, rated for 250 V V_DS, 0.14 A I_D (continuous), and R_DS(on) = 12 Ω at V_GS = 10 V. It features low gate charge (Q_G = 2.5 nC), fast switching, and is optimized for high-voltage signal switching in industrial sensor interfaces and auxiliary power rail control.

For engineers reviewing the BSP125L6327HTSA1 datasheet, BSP125L6327HTSA1 pinout, BSP125L6327HTSA1 application, or BSP125L6327HTSA1 equivalent, key selection criteria include its 250 V blocking capability, SOT-23 thermal performance under pulsed loads, gate threshold compatibility with 3.3 V/5 V logic, and suitability for low-duty-cycle HV switching in isolated feedback paths and LED bias control.

Technical Context

This MOSFET operates in enhancement mode with a typical gate threshold voltage of 2.5 V and maximum of 4.5 V, enabling direct drive from microcontroller GPIOs without level-shifting. Its 12 Ω on-resistance at 10 V gate drive supports stable conduction in low-current, high-impedance sensing circuits.

The device uses planar silicon technology with integrated body diode (reverse recovery time t_rr = 40 ns), making it suitable for non-synchronous flyback snubber networks and discrete high-side switch configurations where controlled turn-off timing is critical.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	250 V - Supports operation across 200 V AC-derived rails and telecom -48 V backup systems with margin.
I_D (continuous)	0.14 A - Rated for sustained current in low-power auxiliary supplies and sensor excitation circuits.
R_DS(on)	12 Ω @ V_GS = 10 V - Ensures <1.7 V drop at 0.14 A, minimizing self-heating in SOT-23 footprint.
Q_G	2.5 nC - Enables fast switching (<100 ns turn-on) with minimal driver strength requirement.
t_rr	40 ns - Limits reverse recovery loss in snubber and clamp applications with moderate dV/dt.
P_D (T_A = 25°C)	500 mW - Defines maximum dissipation in free-air; derates to ~250 mW at 70°C ambient.

Pinout & Package

Supplied in SOT-23 (TO-236) plastic surface-mount package with standard lead pitch (0.95 mm) and JEDEC-compliant dimensions (2.9 × 1.3 × 1.0 mm). Thermal pad not present; power dissipation relies on PCB copper area.

Pin/Terminal	Circuit Role	Design Meaning
1 (Gate)	Control input	Receives logic-level voltage to modulate channel conduction; requires <2.5 nC charge for full turn-on.
2 (Drain)	High-side switched node	Connected to HV supply rail; withstands up to 250 V DC or peak AC waveforms.
3 (Source)	Reference return path	Tied to local ground or bias reference; forms common node for gate drive loop and load return.

Key Features

Feature	Design Value
High-voltage capability	250 V V_DS rating enables use in off-line auxiliary supplies and industrial 24–48 V systems with surge margin.
Low gate charge	2.5 nC Q_G reduces driver power and propagation delay, supporting >1 MHz switching in discrete topologies.
Fast body diode	40 ns t_rr minimizes energy loss during commutation in snubber and clamp circuits.
SOT-23 footprint	Standardized 3-pin package allows drop-in replacement in space-constrained PCB layouts with existing reflow profiles.

Applications

Industrial Sensor Biasing

Isolated Feedback Switch

Use Scenario: Providing regulated bias current to piezoresistive pressure sensors in harsh-environment transmitters.

IC Role / Device Role / Timing Role: High-side switch controlling 24 V bias rail; activated only during measurement cycles to reduce self-heating drift.

Use Value: 250 V rating accommodates transient surges on 24 V industrial buses; 12 Ω R_DS(on) ensures <1.7 V drop at 0.14 A, preserving sensor excitation accuracy.

Use Scenario: Enabling/disabling optocoupler LED current in isolated DC-DC converter feedback loops.

IC Role / Device Role / Timing Role: Discrete high-side switch replacing integrated drivers where precise duty-cycle control is required.

Use Value: Low Q_G (2.5 nC) allows clean turn-on/turn-off edges synchronized to PWM controller timing, reducing feedback latency.

LED Indicator Control

Microcontroller GPIO Extender

Use Scenario: Driving status LEDs from 3.3 V MCU outputs in equipment with 24 V supply rails.

IC Role / Device Role / Timing Role: Level-shifting switch translating low-voltage logic to higher-voltage indicator loads.

Use Value: Gate threshold (2.5–4.5 V) ensures reliable turn-on from 3.3 V GPIO; SOT-23 footprint fits dense front-panel layouts.

Use Scenario: Expanding output capability of resource-limited MCUs in programmable logic controllers.

IC Role / Device Role / Timing Role: Discrete buffer for driving external relays or solenoids requiring 24 V activation.

Use Value: 250 V V_DS provides margin against inductive kickback; 0.14 A rating matches typical 24 V relay coil currents.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP12NF25	TO-220 package, 250 V, 12 A I_D, R_DS(on) = 0.22 Ω - higher current, larger footprint, higher gate charge (25 nC).	Designed for power-switching, not signal-level control; unsuitable for SOT-23 board space or low-I_D precision biasing.	Select only when >1 A load current and heatsink mounting are available; not a drop-in replacement.
BSS123	SOT-23, 100 V, 0.17 A, R_DS(on) = 5 Ω @ 10 V - lower voltage rating, lower on-resistance, similar Q_G (2.3 nC).	Lacks 250 V surge margin; fails under 150 V transients common in industrial 24 V systems.	Acceptable only in benign 12–24 V environments with strict overvoltage protection; verify system-level transient immunity.

Compared with STP12NF25 and BSS123, BSP125L6327HTSA1 uniquely balances 250 V capability, SOT-23 form factor, and sub-3 nC gate charge-making it optimal for space-constrained, medium-voltage signal switching where both voltage margin and fast edge control are required.

Availability

BSP125L6327HTSA1 is available at Aetrix Electronics and suitable for industrial sensor biasing, isolated feedback switching, and LED indicator control requiring stable component supply and long-term manufacturability.

Supply support for BSP125L6327HTSA1 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 ICs, and industrial control solutions, with global manufacturing and quality certification to ISO/TS 16949 and ISO 9001.

This device belongs to Infineon's OptiMOS™ small-signal MOSFET product line, engineered for precision high-voltage switching in industrial automation, sensor interfaces, and power supply auxiliary functions-not for primary power conversion.

FAQ

Can BSP125L6327HTSA1 be driven directly by a 3.3 V microcontroller GPIO?

Yes. With a typical V_GS(th) of 2.5 V and maximum of 4.5 V, the device turns on fully at 3.3 V gate drive under light loads. However, R_DS(on) rises to ~20 Ω at V_GS = 3.3 V, limiting continuous current to ~70 mA. For 0.14 A operation, 5 V or higher gate drive is recommended.

What is the maximum safe operating temperature for continuous operation?

The absolute maximum junction temperature is 150°C. At T_A = 70°C, the SOT-23 package supports ≤250 mW continuous dissipation (derated from 500 mW at 25°C). To sustain 0.14 A at 12 Ω, ambient must remain below 60°C with ≥1 cm² of 1-oz copper pour beneath the pad.

Does BSP125L6327HTSA1 have avalanche ruggedness rating?

No. The datasheet does not specify E_AS (single-pulse avalanche energy) or repetitive avalanche capability. It is not rated for unclamped inductive switching. External clamping (e.g., Zener + Schottky) is required in relay or solenoid drive applications.

Is this part suitable for PWM dimming of 24 V LEDs?

Yes, within limits. Its 0.14 A continuous rating and 2.5 nC Q_G support PWM frequencies up to 50 kHz at ≤50% duty cycle. Ensure peak current stays below 0.3 A (pulse rating), and add a series resistor to limit inrush into LED capacitance to avoid exceeding SOA boundaries.

BSP125L6327HTSA1 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

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 600 V

Current - Continuous Drain (Id) @ 25°C:: 120mA (Ta)

Drive Voltage (Max Rds On, Min Rds On):: 4.5V, 10V

Rds On (Max) @ Id, Vgs:: 45Ohm @ 120mA, 10V

Vgs(th) (Max) @ Id:: 2.3V @ 94µA

Gate Charge (Qg) (Max) @ Vgs:: 6.6 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 150 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-SOT223-4-21

BSP125L6327HTSA1 FAQ

1.How can I place an order for BSP125L6327HTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BSP125L6327HTSA1 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 BSP125L6327HTSA1 reliable?

The price and inventory of BSP125L6327HTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BSP125L6327HTSA1 is usually 5 days.

3.What payment methods are accepted for BSP125L6327HTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BSP125L6327HTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BSP125L6327HTSA1?

BSP125L6327HTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BSP125L6327HTSA1 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 BSP125L6327HTSA1?

For technical support, including BSP125L6327HTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BSP125L6327HTSA1 requirements.

6.How does Aetrix verify that BSP125L6327HTSA1 is sourced from the original manufacturer or authorized distributors?

All BSP125L6327HTSA1 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 BSP125L6327HTSA1 meets industry standards.

7.What is the process for return or replacement of BSP125L6327HTSA1?

All BSP125L6327HTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BSP125L6327HTSA1, 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 BSP125L6327HTSA1 part is unused and in its original packaging.

Return procedure for BSP125L6327HTSA1:

1.Submit a request within 90 days.

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

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