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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Bipolar Transistor Arrays

Infineon Technologies SMBT3906SH6327XTSA1

Name: SMBT3906SH6327XTSA1
Brand: Infineon Technologies
SKU: SMBT3906SH6327XTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SMBT3906SH6327XTSA1

Manufacturer:: Infineon Technologies

Category:: Bipolar Transistor Arrays

Package:: 6-VSSOP, SC-88, SOT-363

Datasheet:: SMBT3906SH6327XTSA1.pdf

Description:: TRANS 2PNP 40V 0.2A PG-SOT363-PO

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Product details

Overview

SMBT3906SH6327XTSA1 from Infineon Technologies is a PNP bipolar junction transistor (BJT) designed for general-purpose switching and amplification in low-voltage, medium-current circuits. It features V_CEO = 40 V, I_C = 200 mA, h_FE = 60–300 (at I_C = 100 µA to 100 mA), V_CE(sat) ≤ 0.4 V (at I_C = 50 mA, I_B = 5 mA), and operates up to T_j = 150 °C - commonly used in discrete logic-level interface drivers and LED load switches.

For engineers reviewing the SMBT3906SH6327XTSA1 datasheet, SMBT3906SH6327XTSA1 pinout, SMBT3906SH6327XTSA1 application, or SMBT3906SH6327XTSA1 equivalent, key selection criteria include DC current gain linearity across 0.1–100 mA, low saturation voltage under pulsed and DC loads, thermal resistance (R_thJS ≤ 240 K/W), and SOT23 package compatibility with automated assembly.

Technical Context

This device implements a single-die PNP silicon BJT structure optimized for fast switching (t_d ≤ 35 ns, t_r ≤ 35 ns, t_f ≤ 75 ns) and stable DC amplification. Its base-emitter and collector-base junctions are engineered for low leakage (I_CBO ≤ 50 nA) and high breakdown integrity (V_(BR)CEO = V_(BR)CBO = 40 V, V_(BR)EBO = 6 V).

The SMBT3906SH6327XTSA1 is rated for continuous operation at T_S ≤ 71 °C in SOT23, with thermal resistance R_thJS ≤ 240 K/W. Its f_T = 250 MHz supports RF-coupled biasing and modest-frequency signal conditioning, while C_cb = 3.5 pF and C_eb = 10 pF define its small-signal capacitance profile.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	40 V - maximum safe collector-emitter voltage before avalanche conduction in open-base configuration
I_C	200 mA - absolute maximum continuous collector current without secondary breakdown
h_FE	60–300 - DC current gain range across 100 µA–100 mA collector current, enabling predictable bias design
V_CE(sat)	≤ 0.4 V @ I_C=50 mA, I_B=5 mA - ensures < 200 mW dissipation in saturated switch mode
f_T	250 MHz - usable for low-noise pre-amplification and digital edge sharpening up to ~30 MHz
R_thJS	≤ 240 K/W - defines junction-to-solder-point thermal path for PCB layout derating below 71 °C case temperature
Package	SOT23 - industry-standard 3-pin surface-mount outline compatible with JEDEC MS-012AC footprint

Pinout & Package

SMBT3906SH6327XTSA1 uses the standard SOT23 plastic package (JEDEC TO-236AB), with 3 terminals arranged in linear order. Pin assignment follows the "1–2–3" sequence as marked on top-side silkscreen: Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal	Reference node for base drive; connects to ground or low-side return path in common-emitter switch
2 (Base)	Control input	Accepts forward-biased current to turn on transistor; requires series resistor for current limiting
3 (Collector)	Current source terminal	Drives load toward positive rail; must be connected through load to V_CC in high-side switch topology

Key Features

Feature	Design Value
High h_FE linearity	Gain remains ≥60 from 100 µA to 100 mA, simplifying bias network design across operating ranges
Low V_CE(sat)	≤0.25 V @ I_C=10 mA/I_B=1 mA enables <100 mW loss in logic-level driven loads
AEC-Q101 qualified	Validated for automotive electronics per stress test requirements (HTOL, TC, HAST, etc.)
Pb-free & RoHS compliant	Meets EU Directive 2011/65/EU; no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE

Applications

LED Driver Circuit

Logic-Level Interface

Use Scenario: Driving 20 mA indicator LEDs from 3.3 V or 5 V microcontroller GPIO pins.

IC Role / Device Role / Timing Role: PNP switch configured in common-emitter mode to sink current from LED anode to ground.

Use Value: V_CE(sat) ≤ 0.25 V minimizes power loss and heat rise in compact PCB layouts.

Use Scenario: Level-shifting between 1.8 V FPGA I/O and 5 V peripheral enable lines.

IC Role / Device Role / Timing Role: Inverting buffer stage providing rail-to-rail output swing and noise margin.

Use Value: Fast t_r/t_f ≤ 35 ns ensures clean transitions without overshoot in 10 MHz control signals.

Automotive Door Module

Industrial Sensor Signal Conditioning

Use Scenario: Controlling window motor relay coils in AEC-Q101-compliant body control units.

IC Role / Device Role / Timing Role: High-side driver for 12 V relay coil with reverse-polarity protection diode integration.

Use Value: Qualified to AEC-Q101 ensures reliability over -40 °C to +125 °C ambient and 150 °C junction.

Use Scenario: Amplifying low-level thermistor or bridge sensor outputs in 24 V PLC analog inputs.

IC Role / Device Role / Timing Role: Discrete emitter-follower buffer isolating sensitive ADC reference from load variations.

Use Value: h_FE ≥ 100 at I_C = 1 mA provides stable current gain with minimal base current error.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP switching transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT3906LT1G	Same die, SOT23-3 package, but lower h_FE min = 30 @ I_C = 10 mA; R_thJS = 250 K/W	Less suitable for precision biasing at low currents; higher thermal resistance limits power density	Select when cost sensitivity outweighs gain consistency and thermal performance
BC807-25,215	Higher h_FE min = 160 @ I_C = 100 mA; V_CEO = 45 V; slightly larger SOT323 footprint	Better for high-gain linear amplification; not drop-in due to different pad layout and marking	Prefer where tighter h_FE tolerance and extended voltage margin are required

Compared with MMBT3906LT1G and BC807-25,215, SMBT3906SH6327XTSA1 offers balanced gain linearity, AEC-Q101 qualification, and optimal thermal resistance for space-constrained automotive and industrial switching - making it the preferred choice where reliability and consistent saturation behavior are critical.

Availability

SMBT3906SH6327XTSA1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and consumer LED lighting systems requiring stable component supply and long-term manufacturability.

Supply support for SMBT3906SH6327XTSA1 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 discrete devices, with global manufacturing and quality certification to ISO/TS 16949 and IATF 16949.

This part belongs to Infineon's "SMBT" family of automotive-qualified discrete transistors, engineered specifically for robustness in harsh-environment switching applications including engine control, lighting, and power distribution modules.

FAQ

Is SMBT3906SH6327XTSA1 pin-compatible with MMBT3906?

Yes - both use identical SOT23-3 package and pinout (Emitter-Base-Collector on pins 1-2-3). However, SMBT3906SH6327XTSA1 is AEC-Q101 qualified and exhibits tighter h_FE distribution and lower R_thJS, making it suitable for automotive-grade designs where MMBT3906 may lack qualification or thermal margin.

What is the maximum allowable base current for continuous operation?

The absolute maximum base current is not explicitly specified, but design practice limits I_B to ≤ I_C/10 for forced beta operation. At I_C = 200 mA, this implies I_B ≤ 20 mA. Derating is required above T_A = 25 °C; consult the Safe Operating Area (SOA) curves in Infineon's AN077 for pulse conditions.

Does this transistor support switching at 1 MHz?

Yes - with f_T = 250 MHz and t_r/t_f ≤ 35 ns, it supports clean square-wave switching up to ~30 MHz in resistive loads. At 1 MHz, switching losses remain low (<5% duty-cycle-dependent heating), provided layout minimizes stray inductance and base drive impedance is ≤ 1 kΩ.

Can SMBT3906SH6327XTSA1 replace a BC557 in existing designs?

Yes, with verification - both are PNP transistors with similar V_CEO (45 V for BC557 vs. 40 V) and I_C (100 mA vs. 200 mA). SMBT3906SH6327XTSA1 offers higher current rating and automotive qualification, but its lower V_(BR)EBO (6 V vs. 5 V) and different h_FE curve require checking bias stability and saturation margin in the target circuit.

SMBT3906SH6327XTSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 6-VSSOP, SC-88, SOT-363

Packaging:: Tape & Reel (TR)

Product Status:: Last Time Buy

Transistor Type:: 2 PNP (Dual)

Current - Collector (Ic) (Max):: 200mA

Voltage - Collector Emitter Breakdown (Max):: 40V

Vce Saturation (Max) @ Ib, Ic:: 400mV @ 5mA, 50mA

Current - Collector Cutoff (Max):: 50nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 10mA, 1V

Power - Max:: 330mW

Frequency - Transition:: 250MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SOT363-PO

SMBT3906SH6327XTSA1 FAQ

1.How can I place an order for SMBT3906SH6327XTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for SMBT3906SH6327XTSA1 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 SMBT3906SH6327XTSA1 reliable?

The price and inventory of SMBT3906SH6327XTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBT3906SH6327XTSA1 is usually 5 days.

3.What payment methods are accepted for SMBT3906SH6327XTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBT3906SH6327XTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMBT3906SH6327XTSA1?

SMBT3906SH6327XTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMBT3906SH6327XTSA1 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 SMBT3906SH6327XTSA1?

For technical support, including SMBT3906SH6327XTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBT3906SH6327XTSA1 requirements.

6.How does Aetrix verify that SMBT3906SH6327XTSA1 is sourced from the original manufacturer or authorized distributors?

All SMBT3906SH6327XTSA1 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 SMBT3906SH6327XTSA1 meets industry standards.

7.What is the process for return or replacement of SMBT3906SH6327XTSA1?

All SMBT3906SH6327XTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with SMBT3906SH6327XTSA1, 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 SMBT3906SH6327XTSA1 part is unused and in its original packaging.

Return procedure for SMBT3906SH6327XTSA1:

1.Submit a request within 90 days.

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

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