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

onsemi 2SD1835T-AA

Name: 2SD1835T-AA
Brand: onsemi
SKU: 2SD1835T-AA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SD1835T-AA

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-226-3, TO-92-3 (TO-226AA)

Datasheet:: 2SD1835T-AA.pdf

Description:: TRANS NPN 50V 2A 3-NP

Quantity:: RFQ Add To RFQ list

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Inventory:9,240

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Product details

Overview

2SD1835T-AA from onsemi is an NPN bipolar junction transistor (BJT) rated for 50 V V_CEO, 2 A continuous collector current, and low 0.15–0.4 V V_CE(sat) at I_C = 1 A / I_B = 50 mA. It features fast switching (t_on = 60 ns, t_f = 30 ns), 150 MHz f_T, and SC-34A (TO-92) package. Used in relay drivers and lamp drivers where low saturation loss and robust DC gain are required.

For engineers reviewing the 2SD1835T-AA datasheet, pinout, applications, or equivalent options, key selection criteria include verified V_CE(sat) at 1 A, h_FE rank T (200–400 @ 100 mA), switching time validation under 25 V/500 mA test conditions, and TO-92 mechanical compatibility with JEDEC TO-226AA footprint.

Technical Context

This NPN BJT employs FBET and MBIT fabrication processes to achieve low V_CE(sat) and high current handling. Its h_FE is binned by DC gain at 100 mA - the "T" suffix denotes 200–400 range - and it maintains usable gain up to 1.5 A (h_FE2 ≥ 40).

Designed for linear and switching operation, it supports pulse currents up to 3 A (I_CP) with thermal derating per PC–T_a curve. Junction temperature is rated to 150°C, and Cob = 12 pF at V_CB = 10 V enables predictable high-frequency behavior in driver stages.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50 V - Maximum safe collector-emitter voltage before breakdown in common-emitter configuration.
I_C (continuous)	2 A - Continuous collector current capability at T_a = 25°C with proper heatsinking.
V_CE(sat)	0.15–0.4 V @ I_C=1 A, I_B=50 mA - Low saturation voltage reduces power loss in switching applications.
h_FE (Rank T)	200–400 @ V_CE=2 V, I_C=100 mA - Confirmed DC current gain bin for consistent bias design.
f_T	150 MHz @ V_CE=10 V, I_C=50 mA - Gain-bandwidth product enabling reliable operation in medium-speed switching.
t_f	30 ns - Fall time measured under specified test circuit; critical for minimizing switching losses in PWM drivers.
C_ob	12 pF @ V_CB=10 V, f=1 MHz - Output capacitance affecting high-frequency response and Miller effect in amplifier/driver stages.

Pinout & Package

2SD1835T-AA is housed in a plastic TO-92 variant designated SC-34A (JEITA/JEDEC: TO-226AA, SOT-54), with standardized lead spacing and body dimensions (14.0 × 4.0 × 5.0 mm typ). The package is through-hole mountable and RoHS-compliant.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Current exit terminal; connected to ground or low-side return path in common-emitter configurations.
2	Collector	Current entry terminal; tied to load supply rail in low-side switch applications.
3	Base	Control input; requires ~50 mA drive for full saturation at 1 A collector current.

Key Features

Feature	Design Value
Low V_CE(sat)	0.15–0.4 V ensures <0.4 W conduction loss at 1 A, reducing thermal stress in relay/lamp drivers.
Fast switching	60 ns turn-on + 30 ns fall time enables efficient operation up to ~2 MHz PWM frequencies.
High-current capability	2 A continuous / 3 A pulsed rating supports driving solenoids, incandescent lamps, and small relays directly.
Gain-binned h_FE	Rank T (200–400) provides predictable base drive requirements and stable biasing across production lots.

Applications

Relay Drivers	Lamp Drivers
Use Scenario: Driving 12 V/500 mA electromagnetic relays in industrial control panels. IC Role / Device Role / Timing Role: NPN low-side switch controlling relay coil current with minimal V_CE(sat)-induced voltage drop. Use Value: Ensures >11.5 V across relay coil at 1 A, guaranteeing reliable pull-in even with PCB trace resistance.	Use Scenario: Switching 24 V incandescent indicator lamps in HVAC control units. IC Role / Device Role / Timing Role: Constant-current switch managing inrush-limited lamp turn-on via controlled base drive. Use Value: 30 ns fall time prevents filament thermal shock during rapid on/off cycling, extending lamp life.
Voltage Regulators	Electrical Equipment Control
Use Scenario: Pass transistor in linear 5 V/1.5 A regulators for embedded sensor modules. IC Role / Device Role / Timing Role: Series pass element dissipating up to 750 mW while maintaining regulation under load transients. Use Value: 150°C max junction temperature and 0.75 W P_C allow operation without heatsink at ambient ≤60°C.	Use Scenario: Output stage in programmable logic controller (PLC) digital output modules. IC Role / Device Role / Timing Role: Discrete switching element interfacing microcontroller GPIO to 24 V field loads. Use Value: Verified 6 V V_EB0 and 60 V V_CBO provide margin against inductive kickback from solenoid/valve loads.

Relay Drivers

Lamp Drivers

Use Scenario: Driving 12 V/500 mA electromagnetic relays in industrial control panels.

IC Role / Device Role / Timing Role: NPN low-side switch controlling relay coil current with minimal V_CE(sat)-induced voltage drop.

Use Value: Ensures >11.5 V across relay coil at 1 A, guaranteeing reliable pull-in even with PCB trace resistance.

Use Scenario: Switching 24 V incandescent indicator lamps in HVAC control units.

IC Role / Device Role / Timing Role: Constant-current switch managing inrush-limited lamp turn-on via controlled base drive.

Use Value: 30 ns fall time prevents filament thermal shock during rapid on/off cycling, extending lamp life.

Voltage Regulators

Electrical Equipment Control

Use Scenario: Pass transistor in linear 5 V/1.5 A regulators for embedded sensor modules.

IC Role / Device Role / Timing Role: Series pass element dissipating up to 750 mW while maintaining regulation under load transients.

Use Value: 150°C max junction temperature and 0.75 W P_C allow operation without heatsink at ambient ≤60°C.

Use Scenario: Output stage in programmable logic controller (PLC) digital output modules.

IC Role / Device Role / Timing Role: Discrete switching element interfacing microcontroller GPIO to 24 V field loads.

Use Value: Verified 6 V V_EB0 and 60 V V_CBO provide margin against inductive kickback from solenoid/valve loads.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN general-purpose switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
2SD1835S-AA	Same package and absolute ratings; h_FE Rank S (140–280) - lower mid-range gain bin.	Suitable where tighter base drive tolerance is acceptable and lower h_FE simplifies stability in feedback loops.	Select 2SD1835S-AA when designing for worst-case h_FE ≥140 and reduced gain variation is preferred.
MJD1835T	Surface-mount SOT-223 package; same V_CEO/I_C/V_CE(sat); higher P_D = 1.5 W; not pin-compatible.	Used in space-constrained PCBs requiring reflow assembly; unsuitable for through-hole legacy designs.	Choose MJD1835T only if board layout supports SMT and thermal management allows higher dissipation.

Compared with 2SD1835S-AA and MJD1835T, the 2SD1835T-AA offers the highest h_FE bin (200–400) in through-hole TO-92, balancing drive simplicity and saturation performance - ideal for cost-sensitive, manually assembled relay/lamp driver circuits where gain consistency matters.

Availability

2SD1835T-AA is available at Aetrix Electronics and suitable for relay drivers, lamp drivers, and voltage regulators requiring stable component supply, long-term obsolescence planning, and RoHS-compliant through-hole transistors.

Supply support for 2SD1835T-AA 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 (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The 2SD1835 series belongs to onsemi's general-purpose bipolar transistor portfolio, designed specifically for cost-effective, high-reliability discrete switching and amplification in industrial control, power management, and electromechanical interface circuits.

FAQ

What is the h_FE range for 2SD1835T-AA?

The 2SD1835T-AA is binned to Rank T, with DC current gain (h_FE) guaranteed between 200 and 400 when measured at V_CE = 2 V and I_C = 100 mA. This binning ensures predictable base drive requirements across production lots and supports stable bias design in linear and switching applications using the 2SD1835T-AA.

Is 2SD1835T-AA RoHS compliant and lead-free?

Yes, 2SD1835T-AA is RoHS compliant and lead-free. The ordering information explicitly states "Pb Free" for both 2SD1835S and 2SD1835T variants, and the device meets JEDEC and RoHS environmental standards. This compliance applies to the 2SD1835T-AA in its standard NP (SC-34A/TO-92) package with 1,500 pcs./box shipping format.

What is the maximum pulsed collector current for 2SD1835T-AA?

The maximum pulsed collector current (I_CP) for 2SD1835T-AA is 3 A, specified under short-duration, non-repetitive conditions. This rating assumes single-pulse operation with appropriate thermal management and is validated per the Absolute Maximum Ratings table in the official datasheet for the 2SD1835T-AA.

Does 2SD1835T-AA have the same pinout as standard TO-92 transistors?

Yes, 2SD1835T-AA uses the standard TO-92 pinout: Pin 1 = Emitter, Pin 2 = Collector, Pin 3 = Base - matching JEDEC TO-226AA and SC-34A mechanical specifications. This alignment ensures direct compatibility with existing TO-92 footprints and pick-and-place tooling used for the 2SD1835T-AA in through-hole assembly.

What is the storage temperature range for 2SD1835T-AA?

The storage temperature range for 2SD1835T-AA is –55°C to +150°C, as defined in the Absolute Maximum Ratings section of its datasheet. This wide range supports long-term warehouse storage and operation in harsh environments, including industrial enclosures where ambient extremes may occur - a specification confirmed for the 2SD1835T-AA variant.

2SD1835T-AA Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-226-3, TO-92-3 (TO-226AA)

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 2 A

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

Vce Saturation (Max) @ Ib, Ic:: 400mV @ 50mA, 1A

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 100mA, 2V

Power - Max:: 750 mW

Frequency - Transition:: 150MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 3-NP

2SD1835T-AA FAQ

1.How can I place an order for 2SD1835T-AA through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SD1835T-AA 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 2SD1835T-AA reliable?

The price and inventory of 2SD1835T-AA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SD1835T-AA is usually 5 days.

3.What payment methods are accepted for 2SD1835T-AA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SD1835T-AA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SD1835T-AA?

2SD1835T-AA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SD1835T-AA 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 2SD1835T-AA?

For technical support, including 2SD1835T-AA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SD1835T-AA requirements.

6.How does Aetrix verify that 2SD1835T-AA is sourced from the original manufacturer or authorized distributors?

All 2SD1835T-AA 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 2SD1835T-AA meets industry standards.

7.What is the process for return or replacement of 2SD1835T-AA?

All 2SD1835T-AA units undergo pre-shipment inspection (PSI). If there is an issue with 2SD1835T-AA, 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 2SD1835T-AA part is unused and in its original packaging.

Return procedure for 2SD1835T-AA:

1.Submit a request within 90 days.

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

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