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

STMicroelectronics 2STR1160

Name: 2STR1160
Brand: STMicroelectronics
SKU: 2STR1160
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2STR1160

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

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

Datasheet:: 2STR1160.pdf

Description:: TRANS NPN 60V 1A SOT-23-3

Quantity:: RFQ Add To RFQ list

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Inventory:7,834

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Product details

Overview

2STR1160 from STMicroelectronics is a low-voltage, fast-switching NPN power transistor fabricated using PB-HCD (Power Bipolar High Current Density) technology. It delivers V_CE(sat) as low as 130 mV at I_C = 0.5 A / I_B = 50 mA, h_FE up to 560 at I_C = 0.5 A, and switching times of t_on = 220 ns / t_off = 500 ns, enabling efficient use in compact LED drivers and battery charger switch stages.

For engineers reviewing the 2STR1160 datasheet, 2STR1160 pinout, 2STR1160 application, or 2STR1160 equivalent, key selection criteria include saturation voltage under defined drive conditions, DC current gain linearity across 0.5–2 A, thermal resistance (R_thj-amb = 250 °C/W on 1 cm² PCB), and SOT-23 package compatibility with high-density surface-mount layouts.

Technical Context

This NPN bipolar junction transistor operates as a saturated switch in low-voltage (<60 V) power control paths. Its PB-HCD process enables simultaneous optimization of V_CE(sat) and h_FE, supporting stable gain >180 at I_C = 0.5 A and >85 at I_C = 1 A while maintaining low base drive requirements.

Designed for resistive and inductive load switching, it features guaranteed breakdown ratings: V_CBO = V_CEO = 60 V, V_EBO = 5 V, and handles I_C = 1 A continuous / I_CM = 2 A pulsed (t_P < 5 ms), with maximum junction temperature of 150 °C and storage range from –65 °C to +150 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CE(sat)	130–210 mV @ I_C=0.5 A/I_B=50 mA → minimizes conduction loss in battery-powered switch nodes
h_FE	180–560 @ I_C=0.5 A/V_CE=2 V → ensures reliable saturation with low base current drive
t_on/t_off	220 ns / 500 ns @ resistive load → supports PWM frequencies up to ~500 kHz without excessive switching loss
P_tot	0.5 W @ T_amb=25°C → defines maximum continuous power dissipation on standard 1 cm² PCB copper area
R_thj-amb	250 °C/W (PCB area = 1 cm²) → determines junction-to-ambient temperature rise per watt dissipated
V_CEO	60 V → sets maximum allowable collector-emitter blocking voltage in off-state

Pinout & Package

Supplied in miniature SOT-23 plastic package for surface mounting. Dimensions conform to JEDEC TO-236AB standard (Table 5: A=0.89–1.40 mm, e=0.85–1.05 mm, E=1.20–1.75 mm).

Pin/Terminal	Circuit Role	Design Meaning
Emitter (E)	Current return path to ground/reference	Low-impedance terminal; connected directly to PCB ground plane for thermal and electrical stability
Base (B)	Control input for transistor biasing	Requires precise current-limited drive (e.g., 50–100 mA) to ensure full saturation without overdrive
Collector (C)	High-current output node	Connected to load (e.g., LED anode or relay coil); must withstand 60 V transient spikes

Key Features

Feature	Design Value
Very low V_CE(sat)	130 mV min @ I_C=0.5 A → reduces I²R loss by >40% vs. standard general-purpose transistors
High h_FE linearity	h_FE ≥180 up to I_C=0.5 A → enables single-stage drive without Darlington configuration
Fast switching	t_off = 500 ns → limits energy loss during transition, critical for high-frequency PWM dimming
PB-HCD process	Optimized carrier density and epitaxial layer design → achieves simultaneous low saturation and high gain

Applications

LED Driver

Battery Charger Control

Use Scenario: Constant-current switching stage for white LED strings in portable lighting.

IC Role / Device Role / Timing Role: NPN power switch controlling LED cathode current path with PWM modulation.

Use Value: Low V_CE(sat) preserves battery voltage headroom; fast t_off prevents LED ghosting during high-frequency dimming.

Use Scenario: Charge-path enable/disable switch in linear or switch-mode Li-ion battery chargers.

IC Role / Device Role / Timing Role: Series pass transistor regulating charging current into battery cell.

Use Value: High h_FE allows microcontroller GPIO direct drive; 60 V V_CEO accommodates input surge margins.

Motor/Relay Driver

Voltage Regulation

Use Scenario: Low-side driver for small DC motors or electromagnetic relays in industrial sensors.

IC Role / Device Role / Timing Role: Saturated switch sinking inductive load current to ground.

Use Value: Fast t_on/t_off reduces flyback energy; 2 A I_CM supports relay coil surge currents.

Use Scenario: Pass element in adjustable linear regulators for 3.3 V or 5 V auxiliary rails.

IC Role / Device Role / Timing Role: Series regulator transistor dissipating excess input-output differential voltage.

Use Value: 0.5 W P_tot and 250 °C/W R_thj-amb define safe operating area for ≤150 mW dissipation at ambient.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN power switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT4401	V_CE(sat) = 750 mV @ I_C=150 mA (higher by ~5×); h_FE = 100–300 (lower max gain)	Lower current capability (I_C = 600 mA) and slower switching (t_off ≈ 250 ns but higher V_CE(sat) limits efficiency)	Acceptable where cost is prioritized over efficiency and thermal performance
ZTX653	V_CE(sat) = 250 mV @ I_C=1 A; h_FE = 250–600; P_tot = 1 W (SOT-89 package)	Larger SOT-89 footprint; higher power handling but incompatible with space-constrained SOT-23 layouts	Preferred when >0.5 W dissipation is required and board area permits larger package

Compared with MMBT4401 and ZTX653, the 2STR1160 uniquely balances ultra-low saturation voltage, high gain, and SOT-23 footprint-making it optimal for thermally constrained, high-efficiency 1 A switching in portable and space-limited designs.

Availability

2STR1160 is available at Aetrix Electronics and suitable for LED driver modules, battery charger circuits, and motor/relay driver stages requiring stable component supply and consistent parametric performance across production batches.

Supply support for 2STR1160 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs and discrete devices for automotive, industrial, and consumer markets.

The 2STR1160 belongs to ST's Power Transistor family, engineered specifically for high-efficiency, low-voltage switching in compact power management and interface circuits where thermal and layout constraints dominate.

FAQ

What is the maximum continuous collector current for the 2STR1160?

The 2STR1160 supports I_C = 1 A continuous at T_amb = 25°C with derating above that ambient temperature. Its I_CM = 2 A peak rating applies only for pulse durations <5 ms and duty cycle ≤1.5%, as verified in the absolute maximum ratings table (Table 2) of the official ST datasheet DocID14430 Rev 3.

Can the 2STR1160 replace a standard general-purpose transistor like BC817 in a 5 V LED driver?

Yes, but with design adjustments: its lower V_CE(sat) (130–210 mV vs. ~300 mV for BC817) reduces power loss, while higher h_FE (up to 560) allows reduced base drive current. However, its 60 V V_CEO and 2 A I_CM exceed BC817 specs, so layout and drive circuit must be validated for the improved performance envelope.

Is the 2STR1160 RoHS-compliant and halogen-free?

Yes-the device is offered in ECOPACK®-compliant SOT-23 packages. ST's ECOPACK® documentation confirms compliance with RoHS Directive 2011/65/EU and halogen-free status per IEC 61249-2-21, as stated in Section 3 of the datasheet and on www.st.com/ecopack.

What is the recommended PCB footprint for the SOT-23 package of the 2STR1160?

The recommended footprint follows JEDEC TO-236AB standards, with pad dimensions matching Figure 11 in the datasheet: center-to-center spacing e = 0.85–1.05 mm (B–B), overall width E = 1.20–1.75 mm, and length D = 2.75–3.04 mm. A 1 cm² copper pour under the package is required to achieve the specified R_thj-amb = 250 °C/W.

2STR1160 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: NPN

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

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

Vce Saturation (Max) @ Ib, Ic:: 430mV @ 100mA, 1A

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 180 @ 500mA, 2V

Power - Max:: 500 mW

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

2STR1160 FAQ

1.How can I place an order for 2STR1160 through Aetrix?

Please submit a Request for Quotation (RFQ) for 2STR1160 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 2STR1160 reliable?

The price and inventory of 2STR1160 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2STR1160 is usually 5 days.

3.What payment methods are accepted for 2STR1160?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2STR1160 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2STR1160?

2STR1160 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2STR1160 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 2STR1160?

For technical support, including 2STR1160 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2STR1160 requirements.

6.How does Aetrix verify that 2STR1160 is sourced from the original manufacturer or authorized distributors?

All 2STR1160 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 2STR1160 meets industry standards.

7.What is the process for return or replacement of 2STR1160?

All 2STR1160 units undergo pre-shipment inspection (PSI). If there is an issue with 2STR1160, 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 2STR1160 part is unused and in its original packaging.

Return procedure for 2STR1160:

1.Submit a request within 90 days.

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

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