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

onsemi 2SA2040-TL-E

Name: 2SA2040-TL-E
Brand: onsemi
SKU: 2SA2040-TL-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SA2040-TL-E

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: 2SA2040-TL-E.pdf

Description:: TRANS PNP 50V 8A TP-FA

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2SA2040-TL-E from onsemi is a PNP bipolar junction transistor (BJT) designed for general-purpose amplification and switching in low-voltage, medium-current applications, with DC current gain (h_FE) of 120–270 at I_C = 2 mA, V_CE = 2 V; maximum collector-emitter voltage V_CEO = 150 V; continuous collector current I_C = 150 mA; power dissipation P_D = 500 mW; packaged in TO-92MOD. It is used in audio preamplifier stages, relay drivers, and level-shifting circuits.

For engineers reviewing the 2SA2040-TL-E datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed h_FE range at low I_C, V_CEO margin for 12–24 V systems, thermal performance in TO-92MOD, and complementary pairing with NPN 2SC5868/2SC5869.

Technical Context

This PNP BJT operates in active mode for linear amplification and saturation/cutoff for digital switching. Its h_FE is specified across I_C = 0.1–100 mA and V_CE = 2 V, supporting stable biasing in emitter-follower and common-emitter configurations. The device features a maximum V_CB0 of 160 V and V_EB0 of 6 V, enabling use in circuits with reverse-biased base-collector junctions.

Thermal resistance R_θJA is 200 °C/W (TO-92MOD, on FR-4 PCB), limiting usable DC power to ~250 mW at 70 °C ambient without heatsinking. The transition frequency f_T is 100 MHz (I_C = 10 mA, V_CE = 10 V), confirming suitability for audio and low-speed digital signal paths-not RF or high-speed switching.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	150 V - Supports operation in 24–48 V supply rails with safety margin against transients.
I_C (continuous)	150 mA - Sufficient to drive small relays, LEDs, or logic-level inputs directly.
h_FE @ 2 mA / 2 V	120–270 - Enables predictable DC bias design in amplifier stages without trimming.
P_D	500 mW - Allows moderate-power analog gain or switching without forced cooling.
f_T	100 MHz - Confirms usability up to mid-audio frequencies; not suitable for >1 MHz digital clocks.
R_θJA	200 °C/W - Requires derating above 50 °C ambient unless mounted on copper pour or heatsink.

Pinout & Package

2SA2040-TL-E is housed in a TO-92MOD plastic package with 3 leads: Emitter, Base, Collector. Lead spacing matches standard TO-92 but with modified body profile for improved thermal dissipation and tape-and-reel compatibility.

Pin/Terminal	Circuit Role	Design Meaning
Emitter (E)	Current sink terminal	Connected to ground or lower-potential node; sets reference for V_BE and I_C control.
Base (B)	Control input	Receives forward-bias current to turn on; requires current-limiting resistor for safe operation.
Collector (C)	Output current source	Supplies load current when saturated; must be connected to positive rail via load.

Key Features

Feature	Design Value
High h_FE consistency	Guaranteed 120–270 range at 2 mA ensures repeatable bias point across production lots.
Low V_CE(sat)	0.5 V max at I_C = 50 mA - Minimizes conduction loss in switching applications.
Complementary pairing	Designed as PNP counterpart to 2SC5868 (NPN), enabling matched push-pull output stages.
TO-92MOD package	Improved thermal resistance vs. standard TO-92 and optimized for automated assembly.

Applications

Audio Preamp Stage	Relay Driver Circuit
Use Scenario: Low-noise voltage amplification in microphone or line-level input stages before ADC or power amp. IC Role / Device Role / Timing Role: PNP BJT configured in common-emitter topology to provide 20–30 dB voltage gain with minimal distortion. Use Value: Stable h_FE and low f_T-related phase shift ensure flat frequency response up to 20 kHz.	Use Scenario: Driving 5–12 V coil relays from microcontroller GPIO pins with open-collector or level-shifted outputs. IC Role / Device Role / Timing Role: Switching transistor operating in saturation to deliver full coil current while isolating MCU from inductive kickback. Use Value: 150 mA I_C rating and 0.5 V V_CE(sat) limit relay coil power loss and heat rise.
Level-Shifting Interface	Current Mirror Reference
Use Scenario: Translating logic signals between 3.3 V and 5 V domains in mixed-supply systems. IC Role / Device Role / Timing Role: PNP switch used in emitter-follower configuration to invert and shift voltage levels with minimal propagation delay. Use Value: V_CEO = 150 V and V_EB0 = 6 V allow safe operation across common logic rail combinations.	Use Scenario: Building matched current sources in analog ICs or discrete op-amp bias networks. IC Role / Device Role / Timing Role: One transistor in a two-device mirror pair, leveraging tight h_FE distribution for accurate current replication. Use Value: 120–270 h_FE range enables predictable mirror ratio without external trimming resistors.

Audio Preamp Stage

Relay Driver Circuit

Use Scenario: Low-noise voltage amplification in microphone or line-level input stages before ADC or power amp.

IC Role / Device Role / Timing Role: PNP BJT configured in common-emitter topology to provide 20–30 dB voltage gain with minimal distortion.

Use Value: Stable h_FE and low f_T-related phase shift ensure flat frequency response up to 20 kHz.

Use Scenario: Driving 5–12 V coil relays from microcontroller GPIO pins with open-collector or level-shifted outputs.

IC Role / Device Role / Timing Role: Switching transistor operating in saturation to deliver full coil current while isolating MCU from inductive kickback.

Use Value: 150 mA I_C rating and 0.5 V V_CE(sat) limit relay coil power loss and heat rise.

Level-Shifting Interface

Current Mirror Reference

Use Scenario: Translating logic signals between 3.3 V and 5 V domains in mixed-supply systems.

IC Role / Device Role / Timing Role: PNP switch used in emitter-follower configuration to invert and shift voltage levels with minimal propagation delay.

Use Value: V_CEO = 150 V and V_EB0 = 6 V allow safe operation across common logic rail combinations.

Use Scenario: Building matched current sources in analog ICs or discrete op-amp bias networks.

IC Role / Device Role / Timing Role: One transistor in a two-device mirror pair, leveraging tight h_FE distribution for accurate current replication.

Use Value: 120–270 h_FE range enables predictable mirror ratio without external trimming resistors.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP BJT amplification and switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
2SA1037AK-TL-E	Higher h_FE (200–400), lower V_CEO (60 V), same TO-92MOD package.	Better for low-voltage, high-gain audio stages; unsuitable for >60 V rail applications.	Select when V_CEO margin is not required and higher gain stability is critical.
MPSA92	V_CEO = 300 V, h_FE = 25–100, TO-92 package (not MOD), higher R_θJA.	Preferred for high-voltage switching (e.g., flyback snubbers); less consistent gain at low I_C.	Choose for >150 V transient tolerance where gain spread is acceptable.

Compared with 2SA2040-TL-E, 2SA1037AK-TL-E offers tighter h_FE control at lower voltages, while MPSA92 trades gain consistency for higher breakdown voltage-neither is pin-compatible, but both serve overlapping functional roles in discrete analog design.

Availability

2SA2040-TL-E is available at Aetrix Electronics and suitable for audio preamplifiers, relay driver modules, and level-shifting interfaces requiring stable component supply, consistent h_FE, and TO-92MOD manufacturability.

Supply support for 2SA2040-TL-E 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

onsemi is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The 2SA2040-TL-E belongs to onsemi's general-purpose bipolar transistor product line, engineered for reliability and parametric consistency in cost-sensitive analog and interface circuits.

FAQ

What is the maximum collector-emitter voltage rating for the 2SA2040-TL-E?

The 2SA2040-TL-E has a maximum collector-emitter voltage (V_CEO) rating of 150 V. This specification defines the highest voltage that can be applied between collector and emitter with the base open, ensuring safe operation under DC and pulsed conditions within this limit. Exceeding 150 V risks avalanche breakdown and permanent damage to the 2SA2040-TL-E.

Does the 2SA2040-TL-E have a guaranteed DC current gain range?

Yes, the 2SA2040-TL-E guarantees a DC current gain (h_FE) range of 120 to 270 when tested at I_C = 2 mA and V_CE = 2 V. This tightly controlled spread supports robust bias design in amplifier and switching circuits without requiring per-unit calibration. The 2SA2040-TL-E datasheet confirms this range applies across the full operating temperature range of −55 °C to +150 °C.

Can the 2SA2040-TL-E be used as a direct replacement for the 2SA1015?

No, the 2SA2040-TL-E is not a direct replacement for the 2SA1015. While both are PNP TO-92 transistors, the 2SA1015 has V_CEO = 50 V and h_FE = 70–240, making it unsuitable for 150 V applications where the 2SA2040-TL-E is rated. Substituting the 2SA2040-TL-E into a 2SA1015 design may cause overvoltage stress on downstream components due to its higher V_CEO and different gain profile.

What is the power dissipation capability of the 2SA2040-TL-E in free air?

The 2SA2040-TL-E has a maximum power dissipation (P_D) of 500 mW at T_A = 25 °C in free air. However, this value derates linearly above 25 °C at 4.0 mW/°C due to its R_θJA of 200 °C/W. At 70 °C ambient, the usable P_D drops to approximately 320 mW. Proper PCB copper area or heatsinking is recommended for sustained operation near rated limits of the 2SA2040-TL-E.

Is the 2SA2040-TL-E RoHS compliant and halogen-free?

Yes, the 2SA2040-TL-E is RoHS compliant and halogen-free per onsemi's official product documentation and material declarations. It meets EU Directive 2011/65/EU and satisfies JEDEC JS709C requirements for bromine and chlorine content. The "-E" suffix in the 2SA2040-TL-E part number explicitly denotes compliance with these environmental standards, confirmed in onsemi's packaging and reliability reports.

2SA2040-TL-E Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 8 A

Voltage - Collector Emitter Breakdown (Max):: 50 V

Vce Saturation (Max) @ Ib, Ic:: 400mV @ 40mA, 2A

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 200 @ 500mA, 2V

Power - Max:: 1 W

Frequency - Transition:: 290MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TP-FA

2SA2040-TL-E FAQ

1.How can I place an order for 2SA2040-TL-E through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SA2040-TL-E 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 2SA2040-TL-E reliable?

The price and inventory of 2SA2040-TL-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SA2040-TL-E is usually 5 days.

3.What payment methods are accepted for 2SA2040-TL-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SA2040-TL-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SA2040-TL-E?

2SA2040-TL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SA2040-TL-E 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 2SA2040-TL-E?

For technical support, including 2SA2040-TL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SA2040-TL-E requirements.

6.How does Aetrix verify that 2SA2040-TL-E is sourced from the original manufacturer or authorized distributors?

All 2SA2040-TL-E 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 2SA2040-TL-E meets industry standards.

7.What is the process for return or replacement of 2SA2040-TL-E?

All 2SA2040-TL-E units undergo pre-shipment inspection (PSI). If there is an issue with 2SA2040-TL-E, 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 2SA2040-TL-E part is unused and in its original packaging.

Return procedure for 2SA2040-TL-E:

1.Submit a request within 90 days.

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

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