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

onsemi NSCT2907ALT1G

Name: NSCT2907ALT1G
Brand: onsemi
SKU: NSCT2907ALT1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NSCT2907ALT1G

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: NSCT2907ALT1G.pdf

Description:: TRANS PNP 60V 0.6A SOT23-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

NSCT2907ALT1G from onsemi is a PNP silicon general-purpose transistor in SOT-23 package, rated for −60 V V_CEO, −600 mA I_C, and 225 mW power dissipation on FR-5 board. It delivers h_FE = 75–300 (at I_C = −0.1 to −500 mA), V_CE(sat) = −0.4 V (at I_C = −150 mA, I_B = −15 mA), and f_T = 200 MHz - used in low-voltage switching and signal amplification circuits in industrial control modules.

For engineers reviewing the NSCT2907ALT1G datasheet, pinout, applications, or equivalent options, key selection criteria include verified PNP polarity, SOT-23 footprint compatibility, guaranteed −60 V breakdown rating, DC current gain across five collector current levels, and Pb-free RoHS-compliant packaging per J-STD-020 reflow profile.

Technical Context

This device operates as a discrete PNP bipolar junction transistor with fixed emitter-base and collector-base junction structures optimized for linear amplification and saturated switching. Its thermal resistance R_JA = 556 °C/W (FR-5) and 417 °C/W (alumina) defines maximum allowable ambient temperature rise under continuous conduction.

Electrical behavior is characterized by three distinct operating regions: cutoff (I_CEO ≤ −50 nA at V_CE = −30 V), active (h_FE validated from −0.1 mA to −500 mA), and saturation (V_CE(sat) ≤ −1.6 V up to −500 mA). Switching performance includes t_on ≤ 45 ns and t_off ≤ 100 ns under specified test conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−60 Vdc - supports rail-to-rail operation in −48 V telecom or −24 V industrial logic interfaces without breakdown.
I_C (max)	−600 mAdc - enables driving medium-current loads such as LED arrays or relay coils directly from microcontroller GPIOs.
h_FE	75–300 - provides stable current amplification across wide collector current range, reducing base drive design margin uncertainty.
f_T	200 MHz - ensures usable small-signal gain up to VHF band, suitable for RF pre-driver or broadband amplifier stages.
V_CE(sat)	−0.4 V (at −150 mA/−15 mA) - minimizes conduction loss and self-heating in high-duty-cycle switching applications.
P_D (FR-5)	225 mW - sets absolute thermal limit for PCB-mounted operation without heatsink, requiring layout-aware copper pour planning.

Pinout & Package

SOT-23 (Case 318, Style 6) surface-mount package with 1.0 mm × 1.4 mm footprint, 0.95 mm height, and gull-wing leads. Lead finish is matte tin over nickel, compatible with standard SnPb and lead-free reflow profiles.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Current-controlled input node	Receives forward-biased base-emitter voltage to initiate minority-carrier injection; requires series resistor to limit I_B per h_FE target.
2 (Emitter)	Common reference terminal	Connected to higher-potential rail in PNP configuration; carries full load current plus base current; must be low-impedance return path.
3 (Collector)	Output current sink	Delivers controlled current to load tied between supply and collector; voltage swing limited by V_CEO and saturation characteristics.

Key Features

Feature	Design Value
Pb-free construction	Meets RoHS Directive 2011/65/EU and J-STD-020 moisture sensitivity level 1 (MSL1) for unlimited floor life.
Guaranteed h_FE range	Validated minimum/maximum DC current gain across five collector current points ensures predictable biasing in production designs.
Low V_CE(sat)	−0.4 V at I_C/I_B = 10 reduces power loss by >40% vs. legacy PNP transistors with >−0.8 V saturation.
High f_T	200 MHz bandwidth allows use in analog front-ends up to 30 MHz without external compensation.

Applications

Industrial Sensor Interface	LED Driver Circuit
Use Scenario: Amplifying low-level output from NTC thermistors or Hall-effect sensors in programmable logic controllers. IC Role / Device Role / Timing Role: PNP transistor configured as common-emitter amplifier with fixed bias network to boost sensor signal before ADC sampling. Use Value: h_FE stability across −55°C to +125°C ensures consistent gain calibration without software compensation.	Use Scenario: Driving 20–50 mA indicator LEDs from 3.3 V or 5 V microcontroller outputs in HMI panels. IC Role / Device Role / Timing Role: Low-side switch with emitter tied to V_CC, collector connected to LED anode, enabling direct GPIO control. Use Value: V_CE(sat) ≤ −0.4 V limits LED current droop and maintains brightness uniformity across multiple channels.
Relay Driver Stage	Level Translation Circuit
Use Scenario: Controlling 12 V or 24 V electromagnetic relays in building automation systems. IC Role / Device Role / Timing Role: Saturated switch providing ≥500 mA coil current with fast turn-on (t_on ≤ 45 ns) to minimize contact arcing. Use Value: t_off ≤ 100 ns and t_s ≤ 80 ns reduce relay release delay, critical for safety-critical interlock sequencing.	Use Scenario: Converting 1.8 V or 3.3 V logic signals to −5 V or −12 V levels for legacy analog subsystems. IC Role / Device Role / Timing Role: Inverter stage using emitter-follower or common-base topology to shift voltage domain while preserving edge integrity. Use Value: f_T = 200 MHz supports clean 10 MHz clock translation without added propagation delay jitter.

Industrial Sensor Interface

LED Driver Circuit

Use Scenario: Amplifying low-level output from NTC thermistors or Hall-effect sensors in programmable logic controllers.

IC Role / Device Role / Timing Role: PNP transistor configured as common-emitter amplifier with fixed bias network to boost sensor signal before ADC sampling.

Use Value: h_FE stability across −55°C to +125°C ensures consistent gain calibration without software compensation.

Use Scenario: Driving 20–50 mA indicator LEDs from 3.3 V or 5 V microcontroller outputs in HMI panels.

IC Role / Device Role / Timing Role: Low-side switch with emitter tied to V_CC, collector connected to LED anode, enabling direct GPIO control.

Use Value: V_CE(sat) ≤ −0.4 V limits LED current droop and maintains brightness uniformity across multiple channels.

Relay Driver Stage

Level Translation Circuit

Use Scenario: Controlling 12 V or 24 V electromagnetic relays in building automation systems.

IC Role / Device Role / Timing Role: Saturated switch providing ≥500 mA coil current with fast turn-on (t_on ≤ 45 ns) to minimize contact arcing.

Use Value: t_off ≤ 100 ns and t_s ≤ 80 ns reduce relay release delay, critical for safety-critical interlock sequencing.

Use Scenario: Converting 1.8 V or 3.3 V logic signals to −5 V or −12 V levels for legacy analog subsystems.

IC Role / Device Role / Timing Role: Inverter stage using emitter-follower or common-base topology to shift voltage domain while preserving edge integrity.

Use Value: f_T = 200 MHz supports clean 10 MHz clock translation without added propagation delay jitter.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP general-purpose transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT2907ALT1G	Identical electrical specs and SOT-23 package; same onsemi die, differentiated only by marking code and tape/reel orientation.	No functional difference; fully interchangeable in all circuit contexts and PCB layouts.	Select when MMBT2907ALT1G offers better distributor stock availability or pricing.
PN2907A	Same V_CEO/I_C ratings but TO-92 package; h_FE min = 100 (vs. 75 for NSCT2907ALT1G); R_JA = 200 °C/W (vs. 556 °C/W).	Requires through-hole PCB assembly and larger board area; unsuitable for space-constrained SMT designs.	Choose only for prototyping or low-volume through-hole builds where manual soldering is preferred.

Compared with MMBT2907ALT1G, NSCT2907ALT1G offers identical performance in identical SOT-23 packaging, while PN2907A trades surface-mount compatibility for higher thermal efficiency and lower h_FE variation - making NSCT2907ALT1G optimal for automated high-density production.

Availability

NSCT2907ALT1G is available at Aetrix Electronics and suitable for industrial sensor interfaces, LED driver circuits, relay driver stages, and level translation circuits requiring stable component supply and RoHS-compliant manufacturing.

Supply support for NSCT2907ALT1G 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 electronics, delivering power management, analog, sensor, and connectivity solutions.

The NSCT2907ALT1G belongs to onsemi's general-purpose bipolar transistor product line, engineered for cost-sensitive, high-reliability switching and amplification in industrial, automotive, and consumer equipment.

FAQ

What is the maximum operating temperature for NSCT2907ALT1G?

The NSCT2907ALT1G has a specified junction and storage temperature range of −55°C to +150°C. Its thermal resistance R_JA is 556 °C/W on FR-5 board, meaning at 25°C ambient, the junction reaches 150°C at ~225 mW dissipation. Derating is required above 25°C at 1.8 mW/°C to maintain reliability. The NSCT2907ALT1G must not exceed 150°C junction temperature during operation.

Is NSCT2907ALT1G pin-compatible with the MMBT2907ALT1G?

Yes - NSCT2907ALT1G and MMBT2907ALT1G share identical SOT-23 pinout (Base-Emitter-Collector on pins 1-2-3), identical electrical specifications, and identical thermal characteristics. They differ only in part marking and tape/reel packaging orientation. The NSCT2907ALT1G can replace MMBT2907ALT1G without any PCB or schematic changes.

What is the typical noise figure of NSCT2907ALT1G at 1 kHz?

The NSCT2907ALT1G exhibits a typical noise figure of 2.0 dB at 1 kHz, V_CE = 10 V, and I_C = −1.0 mA with optimum source resistance. This value is confirmed in Figure 7 of the official datasheet. For low-noise preamplifier designs, the NSCT2907ALT1G performs comparably to other general-purpose PNP transistors in its class.

Does NSCT2907ALT1G support lead-free reflow soldering?

Yes - NSCT2907ALT1G is explicitly marked "Pb-Free" and qualified per J-STD-020 for lead-free reflow. Its matte tin lead finish withstands peak temperatures up to 260°C for 30 seconds. The NSCT2907ALT1G is compatible with standard SAC305 alloy profiles and meets IPC-A-610 Class 2 acceptability requirements.

Can NSCT2907ALT1G be used in linear amplifier configurations?

Yes - NSCT2907ALT1G is characterized for active-mode operation with h_FE specified from −0.1 mA to −500 mA and V_CE = −10 V. Its f_T = 200 MHz and low C_obo = 8.0 pF support stable mid-band voltage gain. However, the NSCT2907ALT1G is not optimized for ultra-low distortion; use only in non-critical analog stages where ±5% gain tolerance is acceptable.

NSCT2907ALT1G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 600 mA

Voltage - Collector Emitter Breakdown (Max):: 60 V

Vce Saturation (Max) @ Ib, Ic:: 1.6V @ 50mA, 500mA

Current - Collector Cutoff (Max):: 10nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 150mA, 10V

Power - Max:: 225 mW

Frequency - Transition:: 200MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3 (TO-236)

NSCT2907ALT1G FAQ

1.How can I place an order for NSCT2907ALT1G through Aetrix?

Please submit a Request for Quotation (RFQ) for NSCT2907ALT1G 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 NSCT2907ALT1G reliable?

The price and inventory of NSCT2907ALT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NSCT2907ALT1G is usually 5 days.

3.What payment methods are accepted for NSCT2907ALT1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NSCT2907ALT1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NSCT2907ALT1G?

NSCT2907ALT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NSCT2907ALT1G 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 NSCT2907ALT1G?

For technical support, including NSCT2907ALT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NSCT2907ALT1G requirements.

6.How does Aetrix verify that NSCT2907ALT1G is sourced from the original manufacturer or authorized distributors?

All NSCT2907ALT1G 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 NSCT2907ALT1G meets industry standards.

7.What is the process for return or replacement of NSCT2907ALT1G?

All NSCT2907ALT1G units undergo pre-shipment inspection (PSI). If there is an issue with NSCT2907ALT1G, 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 NSCT2907ALT1G part is unused and in its original packaging.

Return procedure for NSCT2907ALT1G:

1.Submit a request within 90 days.

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

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