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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

Infineon Technologies MMBTA56LT1HTSA1

Name: MMBTA56LT1HTSA1
Brand: Infineon Technologies
SKU: MMBTA56LT1HTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMBTA56LT1HTSA1

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

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

Datasheet:: MMBTA56LT1HTSA1.pdf

Description:: TRANS PNP 80V 0.5A PG-SOT23

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MMBTA56LT1HTSA1 from Infineon Technologies is a PNP silicon small-signal transistor in SOT-23 package, rated for 80 V V_CEO, 500 mA I_C, and 330 mW P_tot, with h_FE ≥ 100 at 10 mA, used in low-voltage switching and amplification circuits in automotive body control modules and industrial sensor interfaces.

For engineers reviewing the MMBTA56LT1HTSA1 datasheet, MMBTA56LT1HTSA1 pinout, MMBTA56LT1HTSA1 application, or MMBTA56LT1HTSA1 equivalent, key selection criteria include V_CE(sat) ≤ 0.25 V at 100 mA/10 mA drive, f_T = 100 MHz, RoHS-compliant SOT-23 footprint, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This PNP bipolar junction transistor operates in active and saturation regions with guaranteed DC current gain (h_FE) of 100 min at I_C = 10 mA and V_CE = 1 V, and supports pulse operation up to 1 A I_CM for t_p ≤ 10 ms. Its low V_CE(sat) enables efficient switching in 5–24 V logic-level interface stages.

Thermal design is supported by R_thJS ≤ 215 K/W and junction temperature rating of 150 °C, while complementary NPN pairing with MMBTA06 allows balanced push-pull configurations in signal conditioning and level translation circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	80 V - Maximum collector-emitter voltage before breakdown under open-base condition
I_C	500 mA - Continuous collector current rating at T_S ≤ 79 °C
h_FE	100 min @ 10 mA - Minimum DC current gain ensures reliable base drive margin in switching designs
V_CE(sat)	0.25 V max @ 100 mA/10 mA - Low saturation voltage reduces power loss in high-duty-cycle switches
f_T	100 MHz - Transition frequency supports audio-frequency amplification and fast digital switching
C_cb	7 pF - Collector-base capacitance limits high-frequency feedback and oscillation risk
P_tot	330 mW @ T_S ≤ 79 °C - Total dissipation defines thermal derating curve for PCB layout planning

Pinout & Package

SOT-23 surface-mount plastic package with gull-wing leads, 1.3 mm × 2.9 mm footprint, 1.15 mm height, and Pb-free (RoHS-compliant) finish per AEC-Q101 qualification.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	E	Current sink node; connects to ground or lower-potential rail in common-emitter switch
2 (Base)	B	Control input; requires ~1.2 V V_BE(on) and 10 mA IB to saturate at 100 mA IC
3 (Collector)	C	Output node; carries load current from supply rail through external load to emitter

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive applications including body electronics and lighting control
Low V_CE(sat)	≤ 0.25 V at 100 mA/10 mA ensures <25 mW conduction loss in typical 5 V logic-driven loads
Complementary pair	Matched performance with MMBTA06 (NPN) enables symmetrical driver stage design
RoHS-compliant packaging	Pb-free SOT-23 meets EU Directive 2011/65/EU and JEDEC J-STD-609A Class 3

Applications

Automotive Door Module Switching

Industrial Sensor Signal Conditioning

Use Scenario: Driving LED indicators and relay coils in vehicle door control units with 12 V supply.

IC Role / Device Role / Timing Role: PNP switch controlling current flow from battery rail to load, activated by microcontroller GPIO.

Use Value: V_CE(sat) ≤ 0.25 V minimizes heat generation during continuous illumination, supporting 100% duty cycle operation.

Use Scenario: Level-shifting and buffering analog sensor outputs (e.g., thermistor networks) into ADC inputs.

IC Role / Device Role / Timing Role: Common-emitter amplifier with fixed bias, providing gain and isolation between sensor and MCU.

Use Value: h_FE ≥ 100 ensures stable gain across temperature (−50 °C to +125 °C), reducing calibration drift.

Consumer Appliance Power Sequencing

Medical Diagnostic Equipment Interface

Use Scenario: Enabling/disabling auxiliary power rails in smart washing machine control boards.

IC Role / Device Role / Timing Role: High-side switch managing 5–24 V auxiliary supplies based on system state machine signals.

Use Value: 80 V V_CEO provides 2× safety margin over 24 V nominal rail, preventing failure during load dump transients.

Use Scenario: Isolating patient-connected sensor signals from internal digital logic in portable ECG monitors.

IC Role / Device Role / Timing Role: Current-source biasing element for op-amp input stages requiring low leakage and stable DC operating point.

Use Value: ICEO ≤ 0.1 µA at 60 V ensures negligible error current injection into high-impedance biopotential front-ends.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP small-signal transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC856B,115	V_CEO = 65 V, h_FE = 220–475 (higher gain, lower voltage rating)	Not AEC-Q101 qualified; suitable for commercial-grade consumer products only	Select when higher DC gain is required and automotive qualification is unnecessary
PN2907A	SOT-23-3 package, V_CEO = 60 V, V_CE(sat) = 0.3 V max, no AEC-Q101 validation	Limited thermal capability (P_tot = 350 mW but no R_thJS spec or high-temp testing)	Use only in non-automotive, ambient-temperature-limited designs where cost is primary

Compared with BC856B and PN2907A, MMBTA56LT1HTSA1 offers superior automotive qualification, tighter V_CE(sat) control, and verified thermal performance up to 150 °C junction-critical for under-hood and industrial control environments.

Availability

MMBTA56LT1HTSA1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and medical diagnostic equipment requiring stable component supply and long-term lifecycle support.

Supply support for MMBTA56LT1HTSA1 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 AG is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs, with global manufacturing and quality certification infrastructure.

MMBTA56LT1HTSA1 belongs to Infineon's discrete bipolar transistor product line, designed specifically for AEC-Q101-compliant automotive signal switching and amplification in space-constrained SOT-23 layouts.

FAQ

What is the maximum allowable base current for continuous operation?

The absolute maximum continuous base current (I_B) is 100 mA per the datasheet's "Maximum Ratings" table. Exceeding this value risks permanent degradation of h_FE and increased V_CE(sat). For reliable 100 mA collector switching, 10 mA base drive is sufficient and maintains safe thermal margin within the 330 mW total dissipation limit.

Is MMBTA56LT1HTSA1 pin-compatible with MMBTA06?

No-MMBTA56LT1HTSA1 (PNP) and MMBTA06 (NPN) share identical SOT-23 pinout (E-B-C), but their complementary polarity means direct substitution without circuit rework will invert logic behavior and cause functional failure. They are matched for use in complementary pairs, not drop-in replacements.

Does this part support operation at −40 °C ambient temperature?

Yes-MMBTA56LT1HTSA1 is specified from T_stg = −65 °C to +150 °C and tested per AEC-Q101, which includes operational temperature cycling from −40 °C to +125 °C. Electrical characteristics such as h_FE and V_CE(sat) remain within datasheet limits across this full automotive range.

Can it be used in linear amplifier configurations?

Yes-the device is characterized for linear operation with defined h_FE vs. I_C curves and V_BE(on) vs. I_C data across temperature. However, its f_T = 100 MHz and C_cb = 7 pF make it suitable only for audio-band (<20 kHz) and low-speed signal conditioning-not RF or high-fidelity audio applications.

MMBTA56LT1HTSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Last Time Buy

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 500 mA

Voltage - Collector Emitter Breakdown (Max):: 80 V

Vce Saturation (Max) @ Ib, Ic:: 250mV @ 10mA, 100mA

Current - Collector Cutoff (Max):: 100nA

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

Power - Max:: 330 mW

Frequency - Transition:: 100MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SOT23

MMBTA56LT1HTSA1 FAQ

1.How can I place an order for MMBTA56LT1HTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for MMBTA56LT1HTSA1 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 MMBTA56LT1HTSA1 reliable?

The price and inventory of MMBTA56LT1HTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBTA56LT1HTSA1 is usually 5 days.

3.What payment methods are accepted for MMBTA56LT1HTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBTA56LT1HTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMBTA56LT1HTSA1?

MMBTA56LT1HTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMBTA56LT1HTSA1 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 MMBTA56LT1HTSA1?

For technical support, including MMBTA56LT1HTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBTA56LT1HTSA1 requirements.

6.How does Aetrix verify that MMBTA56LT1HTSA1 is sourced from the original manufacturer or authorized distributors?

All MMBTA56LT1HTSA1 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 MMBTA56LT1HTSA1 meets industry standards.

7.What is the process for return or replacement of MMBTA56LT1HTSA1?

All MMBTA56LT1HTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with MMBTA56LT1HTSA1, 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 MMBTA56LT1HTSA1 part is unused and in its original packaging.

Return procedure for MMBTA56LT1HTSA1:

1.Submit a request within 90 days.

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

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