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

Infineon Technologies BSS126H6327XTSA1

Name: BSS126H6327XTSA1
Brand: Infineon Technologies
SKU: BSS126H6327XTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BSS126H6327XTSA1

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: BSS126H6327XTSA1.pdf

Description:: MOSFET N-CH 600V 21MA SOT23-3

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Product details

Overview

BSS126H6327XTSA1 from Infineon Technologies is an N-channel depletion-mode SIPMOS® small-signal transistor rated for 600 V drain-source breakdown, 700 Ω max R_DS(on) at V_GS = 0 V, and 21 mA continuous drain current at 25 °C ambient; it features dv/dt immunity up to 6 kV/µs and is used in high-voltage timing circuits, solid-state relays, and analog switch applications requiring stable off-state blocking.

For engineers reviewing the BSS126H6327XTSA1 datasheet, BSS126H6327XTSA1 pinout, BSS126H6327XTSA1 application, or BSS126H6327XTSA1 equivalent, key selection criteria include verified V_GS(th) bands (J–N), gate charge (Q_g = 1.4–2.1 nC), reverse diode recovery (t_rr = 160–240 ns), and thermal resistance (R_thJA = 250 K/W).

Technical Context

This device operates as a normally-on (depletion-mode) switch with fixed threshold voltage sorting across five bands (J to N), enabling precise biasing in high-impedance analog control paths. Its dv/dt rating of 6 kV/µs supports reliable operation in fast-switching inductive loads without spurious turn-on.

Static characteristics are defined at T_j = 25 °C, including I_DSS = 7–10 mA at V_GS = 0 V and I_D(off) ≤ 0.1 µA at V_DS = 600 V, V_GS = −5 V - confirming robust cutoff behavior under high-voltage stress.

Key Specifications

Parameter	Value and Actual Design Meaning
V_(BR)DSS	600 V - guarantees safe blocking of 400 V DC bus with 1.5× margin in industrial power supplies
R_DS(on),max	700 Ω at V_GS = 0 V - sets on-resistance ceiling for low-current analog switching paths
I_DSS,min	7 mA - defines minimum conduction level when unbiased, critical for leakage-sensitive bias networks
V_GS(th) band	J: −1.8 to −1.6 V - enables predictable turn-off voltage in precision current sources
t_rr	160–240 ns - determines maximum switching frequency in snubberless flyback auxiliary supplies
Q_g	1.4–2.1 nC - directly impacts gate driver power loss and rise/fall time in high-side gate control
R_thJA	250 K/W - limits usable continuous power to 0.5 W at 25 °C ambient on minimal footprint PCB

Pinout & Package

Supplied in PG-SOT-23 (SMD) package with standard three-terminal configuration: Drain (pin 1), Gate (pin 2), Source (pin 3). Lead-free, RoHS-compliant plating.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Drain)	High-voltage output node	Connected to 600 V rail; carries full load current and reverse diode forward path
Pin 2 (Gate)	Depletion-mode control terminal	Negatively biased to modulate channel; requires no drive circuitry for default-on operation
Pin 3 (Source)	Reference and return path	Common node for gate bias reference and reverse diode cathode connection

Key Features

Feature	Design Value
dv/dt immunity	6 kV/µs - prevents false triggering during rapid voltage transients in relay drivers
V_GS(th) band marking	L6327 reel label indicates J–N band - allows system-level matching of threshold spread in parallel arrays
Reverse diode integration	V_SD = 0.81–1.2 V at 16 mA - eliminates need for external freewheeling diode in clamp circuits
Pb-free & RoHS	Lead-free plating per JESD22-A114-HBM Class 0 (<250 V) - meets industrial safety and environmental compliance

Applications

High-Voltage Analog Switch

Solid-State Relay Driver

Use Scenario: Precision current source in HV sensor front-end where constant current must be maintained across varying load impedance.

IC Role / Device Role / Timing Role: Depletion-mode switch providing always-on conduction path until actively pulled off by negative gate bias.

Use Value: Stable I_DSS = 7–10 mA and low temperature drift of V_GS(th) ensure ±2% current accuracy over −40 to +125 °C.

Use Scenario: Driving optocoupler input in isolated AC mains detection circuit with zero-crossing sensing.

IC Role / Device Role / Timing Role: High-voltage switch controlling LED current through optocoupler, leveraging integrated reverse diode for bidirectional clamping.

Use Value: 600 V V_(BR)DSS and 6 kV/µs dv/dt rating eliminate external snubbers and reduce component count by one diode.

Timing Circuit Bias Element

Flyback Auxiliary Supply Switch

Use Scenario: Setting reference current in RC oscillator network for programmable delay generators in industrial PLC modules.

IC Role / Device Role / Timing Role: Depletion-mode transistor acting as constant-current sink to charge timing capacitor linearly.

Use Value: Tight V_GS(th) banding (e.g., J-band ±0.1 V) ensures <±5% timing variation across production lots.

Use Scenario: Primary-side switch in low-power flyback auxiliary supply powering control ICs in offline SMPS.

IC Role / Device Role / Timing Role: Normally-on switch turned off only during startup or fault, reducing standby losses.

Use Value: R_DS(on) = 320–700 Ω at 3 mA enables <10 mW conduction loss while maintaining >90% efficiency at 50 mW output.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BSS138H6327XTSA1	Lower V_(BR)DSS = 50 V, higher I_DSS = 220 mA, R_DS(on) = 3.5 Ω - not suitable above 60 V	Only viable in low-voltage logic-level switching, not HV analog or relay drive	Select only if operating below 40 V and requiring faster switching (t_r = 3.5 ns)
IXTP01N60P	600 V V_(BR)DSS, but enhancement-mode, 100 Ω R_DS(on), 1 A I_D - requires active gate drive	Used in power switching, not bias/timing roles; lacks depletion-mode simplicity	Choose when higher current and active control are needed; not drop-in for BSS126's self-biasing function

Compared with BSS138H6327XTSA1 and IXTP01N60P, BSS126H6327XTSA1 uniquely delivers depletion-mode operation at 600 V with factory-sorted V_GS(th), enabling passive, zero-power bias networks impossible with either alternative.

Availability

BSS126H6327XTSA1 is available at Aetrix Electronics and suitable for high-voltage analog switches, solid-state relay drivers, timing circuit bias elements, and flyback auxiliary supply switches requiring stable component supply and long-term industrial lifecycle support.

Supply support for BSS126H6327XTSA1 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, and industrial control ICs and discrete devices.

The SIPMOS® small-signal transistor product line targets high-reliability, high-voltage analog switching and biasing functions where depletion-mode behavior, dv/dt immunity, and tight parameter binning are essential.

FAQ

What is the correct gate bias polarity for turning off the BSS126H6327XTSA1?

The BSS126H6327XTSA1 is a depletion-mode device and conducts with zero gate-source voltage. To turn it off, apply a negative V_GS - typically −5 V - which depletes the channel. The datasheet specifies I_D(off) ≤ 0.1 µA at V_GS = −5 V and V_DS = 600 V, confirming effective cutoff under this condition.

Does the BSS126H6327XTSA1 require a heatsink in typical operation?

No heatsink is required for typical operation at ≤21 mA continuous drain current and 25 °C ambient, as its 0.50 W power dissipation limit and 250 K/W thermal resistance allow self-cooling on standard PCB copper. At elevated ambient temperatures (>70 °C) or pulsed loads exceeding 85 mA, thermal derating must be applied per the I_D vs. T_A curve on page 4 of the datasheet.

Can the integrated reverse diode replace an external freewheeling diode?

Yes - the integrated body diode supports continuous forward current up to 16 mA and pulse current up to 64 mA, with V_SD = 0.81–1.2 V at 16 mA. It is suitable for low-current clamp and freewheeling roles in auxiliary supplies and relay drivers, eliminating one external component where diode current remains within these limits.

How does V_GS(th) band sorting affect circuit performance?

V_GS(th) band sorting (J–N) groups units by threshold voltage range - e.g., J-band: −1.8 to −1.6 V - enabling matched pairs in current mirrors or parallel configurations. This reduces inter-unit mismatch in bias networks, improving stability of timing constants and reference currents without trimming resistors or calibration.

BSS126H6327XTSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: SIPMOS®

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

FET Type:: N-Channel, Depletion Mode

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 600 V

Current - Continuous Drain (Id) @ 25°C:: 21mA (Ta)

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

Rds On (Max) @ Id, Vgs:: 500Ohm @ 16mA, 10V

Vgs(th) (Max) @ Id:: 2.7V @ 8µA

Gate Charge (Qg) (Max) @ Vgs:: 2.1 nC @ 5 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 28 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 500mW (Ta)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SOT23

BSS126H6327XTSA1 FAQ

1.How can I place an order for BSS126H6327XTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BSS126H6327XTSA1 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 BSS126H6327XTSA1 reliable?

The price and inventory of BSS126H6327XTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BSS126H6327XTSA1 is usually 5 days.

3.What payment methods are accepted for BSS126H6327XTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BSS126H6327XTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BSS126H6327XTSA1?

BSS126H6327XTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BSS126H6327XTSA1 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 BSS126H6327XTSA1?

For technical support, including BSS126H6327XTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BSS126H6327XTSA1 requirements.

6.How does Aetrix verify that BSS126H6327XTSA1 is sourced from the original manufacturer or authorized distributors?

All BSS126H6327XTSA1 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 BSS126H6327XTSA1 meets industry standards.

7.What is the process for return or replacement of BSS126H6327XTSA1?

All BSS126H6327XTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BSS126H6327XTSA1, 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 BSS126H6327XTSA1 part is unused and in its original packaging.

Return procedure for BSS126H6327XTSA1:

1.Submit a request within 90 days.

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

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