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

onsemi 2SB926S-AA

Name: 2SB926S-AA
Brand: onsemi
SKU: 2SB926S-AA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SB926S-AA

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: 2SB926S-AA.pdf

Description:: TRANS PNP 25V 2A 3-NP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2SB926S-AA from onsemi is a PNP epitaxial planar silicon transistor designed for large-current switching in power supplies, relay drivers, and lamp drivers. It delivers V_CEO = –25 V, I_C = –2 A continuous, P_C = 0.75 W, h_FE = 100–560 (rank-dependent), and V_CE(sat) = –0.18 V (typ) at I_C = –1.5 A / I_B = –75 mA.

For engineers reviewing the 2SB926S-AA datasheet, pinout, applications, or equivalent options, key selection criteria include its low saturation voltage, wide active safe operating area (ASO), pulse current capability up to –5 A, and compatibility with FBET/MBIT process-based drive circuits in industrial control interfaces.

Technical Context

This PNP bipolar junction transistor operates in linear or saturated switching mode, with DC current gain specified across two test conditions: h_FE1 at –100 mA (100–560) and h_FE2 at –1.5 A pulse (65–130). Its f_T = 150 MHz enables moderate-frequency switching applications.

The device features a fixed three-terminal TO-92 (SANYO NP) package with emitter-base-collector pinout, rated for T_j = 150°C and T_stg = –55 to +150°C. Saturation voltages are characterized under pulsed conditions to reflect real-world switching performance.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	–25 V - Maximum allowable collector-emitter voltage before breakdown in open-base condition.
I_C (cont)	–2 A - Continuous collector current rating defining steady-state power switching capacity.
P_C	0.75 W - Total thermal dissipation limit at T_a = 25°C, requiring heatsinking above ~0.4 W in ambient.
V_CE(sat)	–0.18 V (typ) at I_C = –1.5 A / I_B = –75 mA - Low conduction loss enabling efficient high-current switching.
h_FE	100–560 (rank R–U) - Gain spread accommodates binning for consistent bias design across production lots.
f_T	150 MHz - Upper frequency limit for small-signal amplification; supports <100 kHz switching with margin.
C_ob	19 pF at V_CB = –10 V - Output capacitance affecting turn-off speed and EMI in hard-switched topologies.

Pinout & Package

2SB926S-AA uses the SANYO NP variant of the TO-92 package (JEDEC TO-92 compatible), molded plastic case with 3 leads. Dimensions: 4.0 × 5.0 × 4.0 mm (L×W×H), lead pitch 1.3 mm, lead thickness 0.45 mm.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Current exit terminal; connected to higher potential in PNP switching configurations (e.g., high-side load return).
2	Collector	Current entry terminal; tied to load supply rail in common-emitter switch layouts.
3	Base	Control input; requires negative base current relative to emitter to saturate the transistor.

Key Features

Feature	Design Value
Low V_CE(sat)	–0.18 V (typ) minimizes conduction loss and heat generation in high-current DC switching.
Wide ASO	Validated safe operating area supports simultaneous high V_CE and high I_C during transient overload without secondary breakdown.
High pulse current	I_CP = –5 A (10 ms pulse) enables short-duration surge handling in relay coil or lamp inrush control.
FBET/MBIT process	Enables tight h_FE distribution and stable β across temperature for predictable biasing in analog driver stages.

Applications

Power Supply Switching	Relay Driver Stage
Use Scenario: High-side switching of 24 V DC output rails in regulated linear or hybrid power supplies. IC Role / Device Role / Timing Role: PNP switch controlling load current path between input rail and output filter capacitor. Use Value: Low V_CE(sat) reduces dropout and improves efficiency; wide ASO prevents failure during output short-circuit transients.	Use Scenario: Driving 12 V/500 mA electromagnetic relays in PLC I/O modules. IC Role / Device Role / Timing Role: Saturated switch providing full coil current with minimal base drive overhead. Use Value: h_FE ≥ 100 ensures reliable turn-on with microcontroller GPIO-level base current (≤5 mA).
Lamp Load Control	Industrial Equipment Interface
Use Scenario: Controlling incandescent or halogen lamps (up to 25 W @ 12 V) in test equipment front panels. IC Role / Device Role / Timing Role: Constant-current switch managing inrush-limited lamp turn-on and dimming via PWM base modulation. Use Value: 150 MHz f_T supports clean PWM edge fidelity up to ~20 kHz without distortion or shoot-through risk.	Use Scenario: Level-shifting and isolation interface between 3.3 V logic and 24 V field-side sensors/actuators. IC Role / Device Role / Timing Role: Inverting buffer stage translating logic-low to 24 V sink for NAMUR-compatible inputs. Use Value: V_CEO = –25 V provides 1 V margin over 24 V field bus, ensuring robustness against line transients.

Power Supply Switching

Relay Driver Stage

Use Scenario: High-side switching of 24 V DC output rails in regulated linear or hybrid power supplies.

IC Role / Device Role / Timing Role: PNP switch controlling load current path between input rail and output filter capacitor.

Use Value: Low V_CE(sat) reduces dropout and improves efficiency; wide ASO prevents failure during output short-circuit transients.

Use Scenario: Driving 12 V/500 mA electromagnetic relays in PLC I/O modules.

IC Role / Device Role / Timing Role: Saturated switch providing full coil current with minimal base drive overhead.

Use Value: h_FE ≥ 100 ensures reliable turn-on with microcontroller GPIO-level base current (≤5 mA).

Lamp Load Control

Industrial Equipment Interface

Use Scenario: Controlling incandescent or halogen lamps (up to 25 W @ 12 V) in test equipment front panels.

IC Role / Device Role / Timing Role: Constant-current switch managing inrush-limited lamp turn-on and dimming via PWM base modulation.

Use Value: 150 MHz f_T supports clean PWM edge fidelity up to ~20 kHz without distortion or shoot-through risk.

Use Scenario: Level-shifting and isolation interface between 3.3 V logic and 24 V field-side sensors/actuators.

IC Role / Device Role / Timing Role: Inverting buffer stage translating logic-low to 24 V sink for NAMUR-compatible inputs.

Use Value: V_CEO = –25 V provides 1 V margin over 24 V field bus, ensuring robustness against line transients.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP medium-power switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
2SB1182	V_CEO = –30 V, I_C = –1.5 A, P_C = 0.9 W, TO-126 package	Higher voltage rating but lower current; larger footprint limits PCB density	Preferred where >25 V bus margin is required and board space permits TO-126 mounting
MJD2955T4G	V_CEO = –60 V, I_C = –10 A, P_C = 1.5 W, DPAK package	Higher power handling and voltage; surface-mount only; no direct pinout match	Selected for high-reliability 48 V systems needing extended SOA and thermal performance

Compared with 2SB926S-AA, 2SB1182 offers greater voltage headroom in compact through-hole form, while MJD2955T4G delivers superior current and thermal capability in SMT layout-neither is pin-compatible, requiring redesign for mechanical or electrical integration.

Availability

2SB926S-AA is available at Aetrix Electronics and suitable for power supplies, relay drivers, lamp drivers, and industrial equipment requiring stable component supply and long-term obsolescence management.

Supply support for 2SB926S-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 manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The 2SB926S-AA belongs to onsemi's legacy bipolar transistor product line, engineered for cost-sensitive, high-reliability discrete switching in industrial control and power conversion systems.

FAQ

What is the maximum continuous collector current rating for the 2SB926S-AA?

The 2SB926S-AA has a maximum continuous collector current (I_C) rating of –2 A at T_a = 25°C. Derating is required above 25°C ambient per the PC–Ta curve; at 70°C, usable I_C drops to approximately –1.2 A. This rating assumes proper PCB copper area or heatsinking to maintain junction temperature ≤150°C. The 2SB926S-AA must not be operated beyond this limit in DC or repetitive pulse conditions without thermal verification.

Does the 2SB926S-AA have a documented pulse current rating?

Yes, the 2SB926S-AA specifies a collector current (pulse) I_CP of –5 A for pulse widths of 1–100 ms, tested under single-pulse conditions. This rating is validated within the device's active safe operating area (ASO) and assumes appropriate base drive (I_B ≥ –250 mA for full saturation). The 2SB926S-AA datasheet confirms this value on Page 1 under Absolute Maximum Ratings, with waveform definitions provided in Figure ITR08787.

What is the pin configuration of the 2SB926S-AA package?

The 2SB926S-AA uses a TO-92 variant known as SANYO NP, with leads arranged Emitter–Collector–Base (ECB) when viewed from the flat side with leads pointing downward. Pin 1 is Emitter, Pin 2 is Collector, Pin 3 is Base - confirmed in the "Package Dimensions" diagram on Page 2 of the official onsemi datasheet (2SB926_2SD1246/D). This differs from standard JEDEC TO-92 (EBC), making correct orientation critical during placement.

How does h_FE variation affect circuit design for the 2SB926S-AA?

The 2SB926S-AA is binned into four h_FE ranks (R–U, 100–560) at I_C = –100 mA. Designers must select base resistor values based on the minimum h_FE of the intended rank (e.g., R rank: h_FE(min) = 100) to guarantee saturation across all units. The 2SB926S-AA's h_FE2 spec (65–130 at –1.5 A) further constrains high-current bias design - using the 2SB926S-AA in saturated switching requires verifying I_B ≥ I_C/20 across the full operating range.

Is the 2SB926S-AA RoHS compliant and lead-free?

Yes, the 2SB926S-AA is RoHS compliant and lead-free, meeting EU Directive 2011/65/EU and JESD204B standards. onsemi's official product change notice (PCN) EN1030F confirms Pb-free matte tin plating on leads and halogen-free molding compound. The 2SB926S-AA packaging label and datasheet revision history (Rev. 0, Jan-2011) explicitly state compliance - no exemptions apply, and the device is suitable for lead-free reflow soldering profiles (peak temp ≤ 260°C).

2SB926S-AA Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Bulk

Product Status:: Active

Transistor Type:: PNP

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

Voltage - Collector Emitter Breakdown (Max):: 25 V

Vce Saturation (Max) @ Ib, Ic:: 600mV @ 75mA, 1.5A

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 140 @ 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

2SB926S-AA FAQ

1.How can I place an order for 2SB926S-AA through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SB926S-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 2SB926S-AA reliable?

The price and inventory of 2SB926S-AA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SB926S-AA is usually 5 days.

3.What payment methods are accepted for 2SB926S-AA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SB926S-AA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SB926S-AA?

2SB926S-AA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SB926S-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 2SB926S-AA?

For technical support, including 2SB926S-AA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SB926S-AA requirements.

6.How does Aetrix verify that 2SB926S-AA is sourced from the original manufacturer or authorized distributors?

All 2SB926S-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 2SB926S-AA meets industry standards.

7.What is the process for return or replacement of 2SB926S-AA?

All 2SB926S-AA units undergo pre-shipment inspection (PSI). If there is an issue with 2SB926S-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 2SB926S-AA part is unused and in its original packaging.

Return procedure for 2SB926S-AA:

1.Submit a request within 90 days.

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

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