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

Infineon Technologies BSS126 E6906

Name: BSS126 E6906
Brand: Infineon Technologies
SKU: BSS126 E6906
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BSS126 E6906

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

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

Datasheet:: BSS126 E6906.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BSS126 E6906 from Infineon Technologies is an N-channel depletion-mode SIPMOS® small-signal transistor rated for 600 V drain-source breakdown voltage, 700 Ω maximum on-state resistance at V_GS = 0 V and I_D = 3 mA, and 6 kV/µs dv/dt immunity-designed for high-voltage level-shifting, constant-current biasing, and solid-state relay driver stages in industrial power supplies and LED ballasts.

For engineers reviewing the BSS126 E6906 datasheet, BSS126 E6906 pinout, BSS126 E6906 application, or BSS126 E6906 equivalent, key selection criteria include verified V_GS(th) band sorting (L-band: −2.1 to −1.9 V), SOT-23 package thermal resistance (250 K/W), reverse diode recovery time (160–240 ns), and gate charge total (1.4–2.1 nC) for snubberless switching integrity.

Technical Context

This depletion-mode MOSFET operates with negative gate threshold voltage (−2.7 to −1.6 V), enabling normally-on functionality without external bias-ideal for fail-safe current sources and high-side load switches where gate drive loss must not disable conduction. Its 600 V V_(BR)DSS and 6 kV/µs dv/dt rating support direct integration into 400 V AC line-connected circuits.

Dynamic performance is defined by low Crss (1.0–1.5 pF), moderate Q_gd (1.2–1.8 nC), and fast turn-off delay (14–21 ns), allowing controlled commutation in high-frequency flyback snubbers and analog current mirrors where gate drive simplicity and voltage transient immunity are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
V_(BR)DSS	600 V - Withstands full 400 V AC peak + margin; enables direct mains-referenced bias networks
R_DS(on),max	700 Ω @ V_GS=0 V, I_D=3 mA - Sets precision current limit in depletion-biased constant-current sources
V_GS(th) (L-band)	−2.1 to −1.9 V - Tight threshold sorting ensures consistent turn-off behavior across production reels
dv/dt immunity	6 kV/µs - Prevents false triggering during fast voltage transients in high-noise industrial environments
t_rr	160–240 ns - Enables reliable reverse recovery in synchronous rectifier auxiliary paths without external clamping
Q_g	1.4–2.1 nC - Low total gate charge permits direct microcontroller GPIO driving with minimal slew rate limiting
P_tot	0.50 W @ T_A=25 °C - Limits continuous dissipation in SOT-23 footprint; requires derating above 70 °C ambient

Pinout & Package

Package: PG-SOT-23 (JEDEC TO-236AB), surface-mount, 3-pin plastic package with standard footprint and thermal pad omitted. RoHS-compliant, Pb-free lead plating.

Pin/Terminal	Circuit Role	Design Meaning
1 (Drain)	High-voltage output node	Connected to 600 V rail or switched inductive load; primary path for I_D and dv/dt stress
2 (Gate)	Control terminal	Negative-biased input requiring stable −2 V reference or open-circuit default for depletion operation
3 (Source)	Reference node / current return	Common connection point for bias network, sense resistor, or diode cathode in source-follower configurations

Key Features

Feature	Design Value
Depletion-mode operation	Conducts at V_GS = 0 V-enables fail-safe current sourcing without active gate bias circuitry
V_GS(th) band sorting (L-band)	−2.1 to −1.9 V per reel label-reduces binning variance in production-level current mirror matching
dv/dt rated	6 kV/µs immunity-eliminates need for gate shielding or RC snubbers in high-dV/dt motor drive auxiliary supplies
Integrated body diode	160–240 ns t_rr, 0.81–1.2 V V_SD-supports bidirectional current flow in analog feedback loops and clamp circuits
SOT-23 thermal design	R_thJA = 250 K/W (min footprint)-permits 500 mW dissipation only with strict PCB copper area and airflow control

Applications

LED Constant-Current Driver

AC Line Voltage Monitor

Use Scenario: Precision current regulation for high-brightness LED strings powered from rectified 230 V AC.

IC Role / Device Role / Timing Role: Depletion-mode current source replacing JFET in two-transistor cascode topology.

Use Value: Stable 7–10 mA output over temperature (±5% drift) using only passive components and L-band V_GS(th) consistency.

Use Scenario: Zero-crossing detection and overvoltage flag generation directly from live AC phase.

IC Role / Device Role / Timing Role: High-impedance, dv/dt-immune voltage divider switch enabling safe MCU input sampling.

Use Value: Immunity to 6 kV/µs transients eliminates false triggers during lightning-induced surges on distribution lines.

Fail-Safe Bias Generator

Snubberless Flyback Auxiliary Supply

Use Scenario: Providing always-on gate bias to a high-side SiC MOSFET in UPS inverters during controller reset.

IC Role / Device Role / Timing Role: Normally-on depletion transistor acting as self-resetting pull-up in isolated gate driver supply rail.

Use Value: Maintains gate voltage > V_th of power device even during 100 ms MCU brownout-prevents shoot-through risk.

Use Scenario: Regulating auxiliary V_CC in offline flyback converters without RCD snubber network.

IC Role / Device Role / Timing Role: Primary-side depletion-mode switch controlling energy transfer timing via V_GS-modulated conduction window.

Use Value: 160–240 ns reverse recovery enables clean turn-off at 100 kHz without voltage spikes exceeding 600 V rating.

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
IXYS IXTP01N60D	600 V V_(BR)DSS, but enhancement-mode (V_GS(th) = 2–4 V); R_DS(on) = 25 Ω typical	Requires active gate drive; unsuitable for fail-safe bias or zero-bias current sources	Select only when gate control logic is available and low R_DS(on) outweighs depletion-mode safety benefits
ON Semiconductor J113	35 V V_(BR)DSS, 1200 Ω R_DS(on), no dv/dt rating or V_GS(th) sorting	Limited to sub-24 V systems; cannot replace BSS126 in AC-line-referenced designs	Acceptable only in low-voltage analog bias networks where 600 V rating and dv/dt immunity are irrelevant

Compared with IXTP01N60D and J113, BSS126 E6906 uniquely delivers depletion-mode operation at 600 V with factory-sorted threshold voltage and proven dv/dt robustness-making it irreplaceable in snubberless, fail-safe, or zero-drive high-voltage bias functions.

Availability

BSS126 E6906 is available at Aetrix Electronics and suitable for LED constant-current drivers, AC line voltage monitors, fail-safe bias generators, and snubberless flyback auxiliary supplies requiring stable component supply under extended industrial temperature and high-voltage stress conditions.

Supply support for BSS126 E6906 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 MOSFETs-with leadership in high-voltage silicon and wide-bandgap solutions.

The BSS126 belongs to Infineon's SIPMOS® small-signal transistor family, engineered specifically for high-voltage depletion-mode applications demanding dv/dt immunity, precise threshold control, and SOT-23 reliability in space-constrained industrial power stages.

FAQ

Is BSS126 E6906 a depletion-mode or enhancement-mode MOSFET?

BSS126 E6906 is a confirmed depletion-mode N-channel MOSFET: it conducts at V_GS = 0 V and requires a negative gate voltage (−1.6 to −2.7 V) to turn off. This is verified by its I_DSS,min = 7 mA at V_GS = 0 V and V_DS = 25 V, and its specified V_GS(th) range of −2.7 to −1.6 V under V_DS = 3 V and I_D = 8 µA conditions.

What does the 'E6906' suffix indicate in BSS126 E6906?

The 'E6906' suffix identifies the tape-and-reel packaging variant: L6906 denotes 3000-piece reels with V_GS(th) sorted into bands (here, L-band: −2.1 to −1.9 V), marked on the reel label. It is not a revision code or temperature grade-it specifies packaging format and threshold binning, per Infineon's 2009 Rev. 1.6 datasheet page 1.

Can BSS126 E6906 be used in place of a JFET in high-voltage current source designs?

Yes-BSS126 E6906 is functionally and electrically compatible with high-voltage JFETs (e.g., 2N5457) in current source roles, offering identical depletion-mode behavior plus superior 600 V rating, tighter V_GS(th) sorting, and documented dv/dt immunity. Its R_DS(on) and g_fs values align with JFET-level analog performance while supporting higher voltage headroom.

Does BSS126 E6906 include an integrated body diode, and what are its key parameters?

Yes-BSS126 E6906 integrates a monolithic body diode with forward current rating I_S = 16 mA continuous, V_SD = 0.81–1.2 V at I_F = 16 mA and T_j = 25 °C, and reverse recovery time t_rr = 160–240 ns under V_R = 300 V, I_F = 10 mA, and di_F/dt = 100 A/µs-confirmed in the "Reverse Diode" section of the datasheet (Rev. 1.6, page 3).

BSS126 E6906 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

BSS126 E6906 FAQ

1.How can I place an order for BSS126 E6906 through Aetrix?

Please submit a Request for Quotation (RFQ) for BSS126 E6906 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 BSS126 E6906 reliable?

The price and inventory of BSS126 E6906 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BSS126 E6906 is usually 5 days.

3.What payment methods are accepted for BSS126 E6906?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BSS126 E6906 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BSS126 E6906?

BSS126 E6906 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BSS126 E6906 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 BSS126 E6906?

For technical support, including BSS126 E6906 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BSS126 E6906 requirements.

6.How does Aetrix verify that BSS126 E6906 is sourced from the original manufacturer or authorized distributors?

All BSS126 E6906 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 BSS126 E6906 meets industry standards.

7.What is the process for return or replacement of BSS126 E6906?

All BSS126 E6906 units undergo pre-shipment inspection (PSI). If there is an issue with BSS126 E6906, 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 BSS126 E6906 part is unused and in its original packaging.

Return procedure for BSS126 E6906:

1.Submit a request within 90 days.

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

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