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

onsemi 2SA1708T-AN

Name: 2SA1708T-AN
Brand: onsemi
SKU: 2SA1708T-AN
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SA1708T-AN

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: SC-71

Datasheet:: 2SA1708T-AN.pdf

Description:: TRANS PNP 100V 1A 3-NMP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2SA1708T-AN from onsemi is a PNP bipolar junction transistor (BJT) designed for medium-power switching and linear amplification in industrial control, power supply regulation, and motor drive circuits. It delivers −100 V V_CEO, −1 A continuous collector current, low −0.4 V typical V_CE(sat) at −400 mA/−40 mA, 120 MHz f_T, and operates up to 150 °C junction temperature.

For engineers reviewing the 2SA1708T-AN datasheet, pinout, applications, or equivalent options, this page provides verified package mapping (SC-71/NMP), rank-specific h_FE range (200–400), absolute maximum ratings, switching timing (t_on/t_stg/t_f), and direct alternatives with documented parameter divergence.

Technical Context

The 2SA1708T-AN employs FBET and MBIT fabrication processes to achieve high breakdown voltage and fast switching performance. Its PNP topology supports high-side switching in complementary pair configurations with the NPN 2SC4488T-AN, sharing identical SC-71 package and taping format.

It is characterized at T_a = 25 °C with guaranteed h_FE ≥ 200 (rank T), V_(BR)CEO = −100 V, and V_CE(sat) ≤ −0.6 V under I_C = −400 mA / I_B = −40 mA - enabling efficient saturation in DC-DC converter output stages and relay drivers.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−100 V - Supports operation in −48 V telecom supplies and industrial −60 V bus systems without breakdown.
I_C (continuous)	−1 A - Sufficient for driving solenoids, small motors, or discrete power stage bias networks.
V_CE(sat) (typ)	−0.1 V @ −400 mA/−40 mA - Minimizes conduction loss and self-heating in saturated-switch applications.
f_T	120 MHz - Enables stable operation in audio preamps and >100 kHz PWM control feedback paths.
h_FE (rank T)	200–400 @ −5 V/−100 mA - Ensures predictable base drive requirements across production lots.
t_stg	850 ns - Critical for minimizing dead-time losses when paired with complementary 2SC4488T-AN in H-bridge designs.
P_C	1 W @ T_a = 25 °C - Requires minimal heatsinking in TO-92–sized PCB footprints.

Pinout & Package

Package: SC-71 (JEITA/ JEDEC), also designated NMP(Taping); surface-mount compatible with standard 0.9 mm lead pitch and 2.54 mm body width. Mass: 0.275 g.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Current sink terminal; connects to higher potential rail in PNP high-side switch configuration.
2	Collector	Current source terminal; ties to load return path or ground-referenced circuit node.
3	Base	Control input; requires current-limited drive (e.g., 1–10 kΩ series resistor) to avoid overdrive.

Key Features

Feature	Design Value
FBET/MBIT process technology	Enables tighter h_FE distribution and improved thermal stability vs. conventional planar BJTs.
Low V_CE(sat)	Reduces power dissipation by >40% compared to legacy −100 V PNP transistors at same I_C.
120 MHz f_T	Supports clean square-wave switching up to ~10 MHz with controlled edge rates in gate driver auxiliary stages.
Rank-T h_FE binning (200–400)	Eliminates need for individual gain trimming in production assemblies requiring consistent current gain.
SC-71 package with taping	Enables automated pick-and-place assembly at 2500 pcs/box; footprint compatible with legacy TO-92 layouts via adapter design.

Applications

Industrial Power Supply Regulation	DC Motor Direction Control
Use Scenario: Regulating auxiliary −12 V or −15 V rails in programmable logic controller (PLC) power modules. IC Role / Device Role / Timing Role: PNP pass transistor in linear regulator topology, sinking load current while maintaining tight output voltage tolerance. Use Value: Low −0.4 V V_CE(sat) minimizes dropout voltage and thermal stress under full 1 A load.	Use Scenario: Driving one leg of an H-bridge for bidirectional 24 V DC brushed motor control in factory automation actuators. IC Role / Device Role / Timing Role: High-side PNP switch enabling true ground-referenced PWM control of motor phase A. Use Value: 850 ns storage time allows <1 μs dead-time setting, reducing shoot-through risk when synchronized with 2SC4488T-AN.
Telecom Line Card Protection	Relay Driver Interface
Use Scenario: Overvoltage clamping and current limiting in −48 V central office line interface cards (LICs). IC Role / Device Role / Timing Role: Active crowbar element triggered during surge events, shunting fault current away from sensitive ASICs. Use Value: −120 V V_CBO rating ensures reliable blocking during lightning-induced transients exceeding −100 V.	Use Scenario: Isolating microcontroller GPIO from 12 V/24 V relay coils in building management system (BMS) controllers. IC Role / Device Role / Timing Role: Saturated switch providing galvanic isolation and coil current sinking with minimal MCU pin loading. Use Value: Guaranteed h_FE ≥ 200 ensures full saturation with ≤ 5 mA base drive, preserving GPIO drive strength for other peripherals.

Industrial Power Supply Regulation

DC Motor Direction Control

Use Scenario: Regulating auxiliary −12 V or −15 V rails in programmable logic controller (PLC) power modules.

IC Role / Device Role / Timing Role: PNP pass transistor in linear regulator topology, sinking load current while maintaining tight output voltage tolerance.

Use Value: Low −0.4 V V_CE(sat) minimizes dropout voltage and thermal stress under full 1 A load.

Use Scenario: Driving one leg of an H-bridge for bidirectional 24 V DC brushed motor control in factory automation actuators.

IC Role / Device Role / Timing Role: High-side PNP switch enabling true ground-referenced PWM control of motor phase A.

Use Value: 850 ns storage time allows <1 μs dead-time setting, reducing shoot-through risk when synchronized with 2SC4488T-AN.

Telecom Line Card Protection

Relay Driver Interface

Use Scenario: Overvoltage clamping and current limiting in −48 V central office line interface cards (LICs).

IC Role / Device Role / Timing Role: Active crowbar element triggered during surge events, shunting fault current away from sensitive ASICs.

Use Value: −120 V V_CBO rating ensures reliable blocking during lightning-induced transients exceeding −100 V.

Use Scenario: Isolating microcontroller GPIO from 12 V/24 V relay coils in building management system (BMS) controllers.

IC Role / Device Role / Timing Role: Saturated switch providing galvanic isolation and coil current sinking with minimal MCU pin loading.

Use Value: Guaranteed h_FE ≥ 200 ensures full saturation with ≤ 5 mA base drive, preserving GPIO drive strength for other peripherals.

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
2SA1708S-AN	Same package and absolute ratings; h_FE bin: 140–280 (lower gain, wider spread)	Suitable where base drive margin is ample and gain consistency is non-critical	Select 2SA1708S-AN only if cost sensitivity outweighs need for tight h_FE control in closed-loop designs.
MJD2955G	TO-220 package; −60 V V_CEO, −10 A I_C, higher P_C (75 W); no rank binning	Used in high-current linear regulators or automotive alternator field control - not drop-in	Choose MJD2955G only when board space permits TO-220 and system demands >1 A continuous current.

Compared with 2SA1708S-AN, the 2SA1708T-AN offers superior h_FE consistency for precision base drive design; versus MJD2955G, it trades raw power handling for compact SC-71 footprint and optimized switching speed in sub-1 A applications.

Availability

2SA1708T-AN is available at Aetrix Electronics and suitable for industrial power supply regulation, DC motor direction control, telecom line card protection, and relay driver interface applications requiring stable component supply, consistent h_FE binning, and RoHS-compliant taping.

Supply support for 2SA1708T-AN 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 specializing in energy-efficient silicon solutions for automotive, industrial, cloud computing, and IoT applications.

The 2SA1708T-AN belongs to onsemi's general-purpose bipolar transistor family engineered for robustness and repeatability in industrial switching and analog signal conditioning - emphasizing high V_CEO, low saturation voltage, and process-controlled gain uniformity.

FAQ

What is the h_FE range for 2SA1708T-AN, and how is it binned?

The 2SA1708T-AN is binned to Rank T, guaranteeing DC current gain (h_FE) between 200 and 400 when measured at V_CE = −5 V and I_C = −100 mA. This tighter specification than Rank S (140–280) enables more predictable base drive design in production systems without per-unit calibration. The 2SA1708T-AN achieves this via onsemi's FBET/MBIT process control and post-test sorting.

Is 2SA1708T-AN pin-compatible with 2SC4488T-AN?

Yes - the 2SA1708T-AN and 2SC4488T-AN share identical SC-71 (NMP) package dimensions, pinout (Emitter–Collector–Base), and taping format. Their complementary PNP/NPN polarity and matched electrical characteristics (e.g., f_T, V_CE(sat), t_stg) make them intended for direct pairing in push-pull and H-bridge topologies. The 2SA1708T-AN pinout is validated per onsemi document No.3094-1/8.

What is the maximum allowable junction temperature for 2SA1708T-AN?

The absolute maximum junction temperature (T_j) for 2SA1708T-AN is 150 °C, as specified in the Absolute Maximum Ratings table. Operation above this limit risks permanent degradation of the silicon die and metallization. Derating curves in Figure No.3094-5/8 show that usable collector dissipation drops to ~0.5 W at T_a = 75 °C, confirming thermal design must account for ambient and PCB copper area.

Does 2SA1708T-AN meet RoHS requirements?

Yes - the 2SA1708T-AN is Pb-free and RoHS-compliant, as confirmed in the Ordering Information table (memo column states "Pb Free" for 2SA1708T-AN). It conforms to EU Directive 2011/65/EU and subsequent amendments, with homogeneous material analysis verifying lead content below 1000 ppm threshold. Full compliance documentation is available via onsemi's quality portal.

Can 2SA1708T-AN be used in linear amplifier applications?

Yes - the 2SA1708T-AN supports linear operation with verified h_FE stability across I_C = 1 mA to 500 mA (see Figure No.3094-3/8) and low distortion at moderate frequencies. Its 120 MHz f_T and low Cob (8.5 pF) enable use in Class-A audio preamplifiers and instrumentation front-ends where gain accuracy and bandwidth matter. However, thermal management remains critical due to 1 W P_C limit.

2SA1708T-AN Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: SC-71

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 1 A

Voltage - Collector Emitter Breakdown (Max):: 100 V

Vce Saturation (Max) @ Ib, Ic:: 600mV @ 40mA, 400mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 200 @ 100mA, 5V

Power - Max:: 1 W

Frequency - Transition:: 120MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 3-NMP

2SA1708T-AN FAQ

1.How can I place an order for 2SA1708T-AN through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SA1708T-AN 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 2SA1708T-AN reliable?

The price and inventory of 2SA1708T-AN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SA1708T-AN is usually 5 days.

3.What payment methods are accepted for 2SA1708T-AN?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SA1708T-AN transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SA1708T-AN?

2SA1708T-AN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SA1708T-AN 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 2SA1708T-AN?

For technical support, including 2SA1708T-AN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SA1708T-AN requirements.

6.How does Aetrix verify that 2SA1708T-AN is sourced from the original manufacturer or authorized distributors?

All 2SA1708T-AN 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 2SA1708T-AN meets industry standards.

7.What is the process for return or replacement of 2SA1708T-AN?

All 2SA1708T-AN units undergo pre-shipment inspection (PSI). If there is an issue with 2SA1708T-AN, 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 2SA1708T-AN part is unused and in its original packaging.

Return procedure for 2SA1708T-AN:

1.Submit a request within 90 days.

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

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