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

onsemi 2SA1707S-AN

Name: 2SA1707S-AN
Brand: onsemi
SKU: 2SA1707S-AN
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SA1707S-AN

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: SC-71

Datasheet:: 2SA1707S-AN.pdf

Description:: TRANS PNP 50V 3A 3-NMP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2SA1707S-AN from onsemi is a PNP bipolar junction transistor rated for −50 V V_CEO, −3 A I_C, and 1 W P_C, featuring low V_CE(sat) (−0.35 V typ at −2 A), fast switching (t_on = 70 ns), and SC-71 (NMP) surface-mount package. It serves as a high-current switching element in DC-DC converter output stages and industrial motor drive base circuits.

For engineers reviewing the 2SA1707S-AN datasheet, pinout, applications, or equivalent options, key selection criteria include verified V_CE(sat) at 2 A, h_FE rank S (140–280 at −100 mA), t_stg ≤ 650 ns, and JEITA SC-71 mechanical compatibility with automated placement.

Technical Context

This PNP transistor uses FBET and MBIT processes to achieve wide safe operating area (ASO) and stable gain across temperature. Its −50 V V_CEO and −60 V V_CBO support medium-voltage industrial switching, while f_T = 150 MHz enables use in high-speed linear amplification up to ~10 MHz.

Designed for DC-coupled switching with fixed-base drive, it operates with V_BE(sat) = −0.95 V (typ) at −2 A/−100 mA, and exhibits Cob = 25 pF at −10 V V_CB, supporting predictable turn-off behavior in hard-switched topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−50 V - Supports rail voltages up to −45 V in reliable switching operation
I_C	−3 A continuous - Handles peak load currents in 24 V industrial control outputs
V_CE(sat)	−0.35 V (typ) at −2 A/−100 mA - Minimizes conduction loss in high-duty-cycle switches
h_FE	140–280 (Rank S, −2 V, −100 mA) - Ensures predictable base drive sizing for saturation
f_T	150 MHz - Enables stable small-signal amplification up to mid-VHF range
t_on/t_f	70 ns / 35 ns - Supports PWM frequencies >500 kHz with controlled edge rates
P_C	1 W @ T_A = 25°C - Requires thermal pad or copper pour for >0.5 A sustained current

Pinout & Package

Package: SC-71 (JEITA), also designated NMP(Taping); 3-pin surface-mount plastic package with gull-wing leads; 6.9 mm × 2.5 mm footprint; 0.275 g mass; RoHS-compliant, Pb-free.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Current sink terminal; connected to most negative potential in PNP switch configuration
2	Collector	High-side switching node; ties to load return or regulated rail in common-emitter topology
3	Base	Control input; requires ≥100 mA drive for full saturation at 2 A collector current

Key Features

Feature	Design Value
Low V_CE(sat)	−0.35 V typical at −2 A ensures <0.7 W conduction loss in 24 V relay drivers
Wide ASO	Rated for single-pulse I_CP = −6 A and robust second breakdown margin up to 100 ms
Fast switching	t_on/t_f = 70/35 ns enables clean edges in 1–2 MHz gate driver auxiliary stages
Rank-coded h_FE	Rank S (140–280) guarantees tight DC gain distribution for production batch consistency
SC-71 package	JEITA-standard footprint supports high-density layout and reflow-compatible assembly

Applications

Industrial Motor Control	DC-DC Converter Output Stage
Use Scenario: Driving gate of N-channel MOSFET in half-bridge bootstrap circuit for 24 V BLDC motor controllers. IC Role / Device Role / Timing Role: PNP level-shifting switch providing active pull-down during high-side MOSFET off-time. Use Value: Low V_CE(sat) minimizes voltage drop across emitter resistor, preserving bootstrap capacitor charge.	Use Scenario: Synchronous rectifier replacement in non-isolated buck converters delivering 3–5 A at 5–12 V. IC Role / Device Role / Timing Role: Discrete PNP switch replacing Schottky diode to reduce forward loss in discontinuous conduction mode. Use Value: 150 MHz f_T and 35 ns fall time ensure clean turn-off before synchronous FET turn-on, preventing shoot-through.
Programmable Logic Output	Industrial Relay Driver
Use Scenario: High-current open-collector interface between FPGA I/O bank and 24 V PLC input modules. IC Role / Device Role / Timing Role: Current-sinking output stage translating 3.3 V logic to −24 V signal levels with defined slew control. Use Value: Rank S h_FE ensures consistent base current requirement across manufacturing lots for reliable logic-level translation.	Use Scenario: Direct drive of 24 V/1 A electromagnetic relays in factory automation I/O terminals. IC Role / Device Role / Timing Role: Final-stage PNP switch sinking relay coil current with fast de-energization via active base discharge. Use Value: 650 ns max storage time enables <1 ms relay release, meeting SIL-2 response timing requirements.

Industrial Motor Control

DC-DC Converter Output Stage

Use Scenario: Driving gate of N-channel MOSFET in half-bridge bootstrap circuit for 24 V BLDC motor controllers.

IC Role / Device Role / Timing Role: PNP level-shifting switch providing active pull-down during high-side MOSFET off-time.

Use Value: Low V_CE(sat) minimizes voltage drop across emitter resistor, preserving bootstrap capacitor charge.

Use Scenario: Synchronous rectifier replacement in non-isolated buck converters delivering 3–5 A at 5–12 V.

IC Role / Device Role / Timing Role: Discrete PNP switch replacing Schottky diode to reduce forward loss in discontinuous conduction mode.

Use Value: 150 MHz f_T and 35 ns fall time ensure clean turn-off before synchronous FET turn-on, preventing shoot-through.

Programmable Logic Output

Industrial Relay Driver

Use Scenario: High-current open-collector interface between FPGA I/O bank and 24 V PLC input modules.

IC Role / Device Role / Timing Role: Current-sinking output stage translating 3.3 V logic to −24 V signal levels with defined slew control.

Use Value: Rank S h_FE ensures consistent base current requirement across manufacturing lots for reliable logic-level translation.

Use Scenario: Direct drive of 24 V/1 A electromagnetic relays in factory automation I/O terminals.

IC Role / Device Role / Timing Role: Final-stage PNP switch sinking relay coil current with fast de-energization via active base discharge.

Use Value: 650 ns max storage time enables <1 ms relay release, meeting SIL-2 response timing requirements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP switching transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
2SA1707T-AN	Same package and absolute ratings; h_FE rank T (200–400 at −100 mA)	Better suited for low-base-drive designs where higher gain reduces MCU GPIO loading	Select when base current budget is constrained and tighter h_FE spread is acceptable
MMBT2907ALT1G	Smaller SOT-23 package; lower I_C (−600 mA), lower V_CEO (−60 V), higher V_CE(sat) (−1.6 V at −500 mA)	Limited to sub-amp signal switching; not suitable for power switching above 0.5 A	Choose only for space-constrained logic-level inversion, not power switching

Compared with 2SA1707T-AN, the 2SA1707S-AN offers tighter h_FE control for deterministic base drive design, while MMBT2907ALT1G trades current capacity for footprint reduction-neither is pin-compatible, and both require PCB redesign.

Availability

2SA1707S-AN is available at Aetrix Electronics and suitable for industrial motor control, DC-DC converter output stages, programmable logic outputs, and industrial relay drivers requiring stable component supply and traceable sourcing.

Supply support for 2SA1707S-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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.

The 2SA1707S-AN belongs to onsemi's general-purpose bipolar transistor product line, engineered for high-reliability discrete switching in industrial power interfaces and motor control subsystems.

FAQ

What is the maximum continuous collector current rating for the 2SA1707S-AN?

The 2SA1707S-AN is rated for −3 A continuous collector current (I_C) at T_A = 25°C. Derating is required above 25°C ambient per the PC–Ta curve; at 75°C, maximum I_C drops to approximately −1.8 A. This rating assumes adequate PCB copper area for thermal dissipation, as the device has 1 W total power dissipation capability.

Does the 2SA1707S-AN have a specified gain-bandwidth product (f_T)?

Yes, the 2SA1707S-AN has a guaranteed minimum f_T of 150 MHz at V_CE = −10 V and I_C = −50 mA. This value is measured and specified in the official onsemi datasheet No. 3093, confirming its suitability for high-frequency amplification and fast-switching applications up to mid-VHF.

How does the h_FE ranking (S vs. T) affect selection of the 2SA1707S-AN?

The "S" suffix in 2SA1707S-AN denotes h_FE = 140–280 at V_CE = −2 V and I_C = −100 mA. This narrower gain band allows precise base resistor calculation in production designs, reducing variation in saturation voltage and switching speed across units-critical for consistent performance in relay drivers and motor control outputs.

What is the package type and lead finish of the 2SA1707S-AN?

The 2SA1707S-AN uses the SC-71 package (JEITA designation), also labeled NMP(Taping) by onsemi. It features gull-wing surface-mount leads with Pb-free (RoHS-compliant) finish, 2.54 mm pin pitch, and is supplied in tape-and-reel format with 2,500 pcs./reel. The outline drawing is documented as EN3093A.

Can the 2SA1707S-AN be used in avalanche mode?

No, the 2SA1707S-AN is not rated or characterized for avalanche operation. Its absolute maximum ratings specify V_(BR)CEO = −50 V only under standard test conditions (I_C = −1 mA, R_BE = ∞). Operation beyond recommended conditions-including repetitive or single-pulse avalanche-may cause irreversible degradation and is outside the device's qualified reliability envelope.

2SA1707S-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):: 3 A

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

Vce Saturation (Max) @ Ib, Ic:: 700mV @ 100mA, 2A

Current - Collector Cutoff (Max):: 1µA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 140 @ 100mA, 2V

Power - Max:: 1 W

Frequency - Transition:: 150MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 3-NMP

2SA1707S-AN FAQ

1.How can I place an order for 2SA1707S-AN through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SA1707S-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 2SA1707S-AN reliable?

The price and inventory of 2SA1707S-AN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SA1707S-AN is usually 5 days.

3.What payment methods are accepted for 2SA1707S-AN?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SA1707S-AN transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SA1707S-AN?

2SA1707S-AN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SA1707S-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 2SA1707S-AN?

For technical support, including 2SA1707S-AN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SA1707S-AN requirements.

6.How does Aetrix verify that 2SA1707S-AN is sourced from the original manufacturer or authorized distributors?

All 2SA1707S-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 2SA1707S-AN meets industry standards.

7.What is the process for return or replacement of 2SA1707S-AN?

All 2SA1707S-AN units undergo pre-shipment inspection (PSI). If there is an issue with 2SA1707S-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 2SA1707S-AN part is unused and in its original packaging.

Return procedure for 2SA1707S-AN:

1.Submit a request within 90 days.

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

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