Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Nexperia USA Inc. BSR41,115

Name: BSR41,115
Brand: Nexperia USA Inc.
SKU: BSR41,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BSR41,115

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: BSR41,115.pdf

Description:: TRANS NPN 60V 1A SOT-89

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,141

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

BSR41,115 from Nexperia is an NPN medium-power bipolar junction transistor in SOT89 package, rated for 60 V V_CEO, 1 A continuous collector current, and 1.35 W power dissipation at T_amb ≤ 25 °C. It serves as a low-side switch or linear regulator pass element in battery-powered industrial controls and MOSFET gate drivers.

For engineers reviewing the BSR41,115 datasheet, BSR41,115 pinout, BSR41,115 application, or BSR41,115 equivalent, key selection criteria include DC current gain (h_FE = 50–300), saturation voltage (V_CE(sat) ≤ 500 mV at I_C = 500 mA), thermal resistance (R_th(j-sp) = 13 K/W), and SOT89 mounting compatibility with FR4 PCBs.

Technical Context

This transistor operates in active, saturation, and cutoff regions with defined absolute maximum ratings per IEC 60134. Its h_FE varies from 50 (I_C = 500 mA) to 300 (I_C = 100 mA), supporting both switching and linear amplification roles under pulsed conditions (t_p ≤ 300 µs, duty δ ≤ 0.01).

Thermal performance is optimized via the exposed collector pad in the SOT89 package, delivering R_th(j-sp) = 13 K/W to solder point and enabling stable operation up to T_j = 150 °C. Switching times are specified as t_on ≤ 250 ns and t_off ≤ 1 µs under defined drive conditions (I_Bon/I_Boff = ±5 mA).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	60 V - Maximum safe collector-emitter voltage with base open; defines upper rail limit in low-side switch designs.
I_C	1 A - Continuous DC collector current rating; supports load switching up to ~12 W at 12 V supply.
h_FE	50–300 - DC current gain range across operating points; enables predictable base drive sizing for saturation.
V_CE(sat)	≤ 500 mV at I_C = 500 mA, I_B = 50 mA - Low saturation voltage minimizes conduction loss and self-heating.
R_th(j-sp)	13 K/W - Junction-to-solder-point thermal resistance; allows direct thermal coupling to PCB copper for passive cooling.
f_T	100 MHz - Transition frequency at V_CE = 10 V, I_C = 50 mA; confirms usable bandwidth for moderate-speed switching.
t_off	≤ 1 µs - Turn-off time under specified drive; suitable for PWM frequencies up to ~100 kHz with margin.

Pinout & Package

SOT89 (SC-62) plastic surface-mounted package with exposed collector pad for thermal management; dimensions 4.5 mm × 2.5 mm × 1.5 mm, 1.5 mm lead pitch, 6 cm² recommended copper pad area.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter (E)	Current return path; connected to ground or low-side reference in switch configurations.
2	Collector (C)	Main power output node; electrically and thermally tied to exposed pad for heat sinking.
3	Base (B)	Control input; requires current-limited drive (e.g., 5–50 mA) to achieve full saturation.

Key Features

Feature	Design Value
High current capability	1 A continuous collector current supports robust load switching without external heatsinking in many applications.
Low saturation voltage	V_CE(sat) ≤ 500 mV ensures <1 W conduction loss at 1 A, reducing thermal stress on PCB layout.
Exposed collector pad	Integral thermal path to PCB improves power handling and enables reliable operation at ambient temperatures up to 150 °C.
Fast switching	250 ns turn-on and 1 µs turn-off support efficient PWM control in power management circuits.
Complementary PNP pair	BSR31 provides matched characteristics for push-pull or H-bridge topologies requiring dual polarity control.

Applications

Linear Voltage Regulators

Low-Side Switches

Use Scenario: Used as pass transistor in adjustable linear regulators (e.g., with LM317 feedback network) supplying 3.3 V/1 A to microcontroller subsystems.

IC Role / Device Role / Timing Role: Pass element regulating output voltage by dissipating excess power as heat; operates in active region.

Use Value: Delivers low-noise, ripple-free DC output with h_FE-based current amplification enabling precise base-controlled current limiting.

Use Scenario: Controls 12 V solenoid loads in industrial PLC I/O modules with microcontroller GPIO drive.

IC Role / Device Role / Timing Role: Low-side switch sinking load current to ground; driven by 3.3 V/5 V logic with series base resistor.

Use Value: V_CE(sat) ≤ 500 mV limits power loss to <500 mW at 1 A, avoiding forced-air cooling in compact enclosures.

Battery-Driven Devices

MOSFET Drivers

Use Scenario: Enables/disables power to sensor nodes in wireless IoT edge devices powered by Li-ion cells (3.0–4.2 V).

IC Role / Device Role / Timing Role: Load switch isolating downstream circuitry during sleep mode; operated in cutoff/saturation only.

Use Value: Low I_CBO (≤100 nA) minimizes standby current drain, extending battery life beyond 1 year in duty-cycled applications.

Use Scenario: Drives gate of N-channel power MOSFET in buck converter high-side configuration using bootstrap circuitry.

IC Role / Device Role / Timing Role: Level-shifting saturated switch translating logic-level signals to higher-voltage gate drive rails.

Use Value: Fast t_off ≤ 1 µs ensures clean gate discharge, preventing shoot-through in synchronous converters.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN medium-power transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BSR31	PNP complement; same package, matching V_CEO = 60 V, I_C = 1 A, but opposite polarity.	Required where complementary switching (e.g., push-pull output stage) or high-side sourcing is needed.	Select BSR31 only when PNP functionality is explicitly required; not a drop-in replacement for BSR41,115.
ZTX653	Higher V_CEO = 100 V, h_FE = 100–600, but larger SOT223 package and no exposed pad; R_th(j-a) = 125 K/W.	Better suited for higher-voltage industrial supplies (>60 V), but less thermally efficient on standard FR4.	Choose ZTX653 only if voltage headroom >60 V is critical and thermal design accommodates higher R_th.

Compared with BSR31 and ZTX653, BSR41,115 uniquely balances 60 V/1 A rating, low R_th(j-sp), and SOT89 footprint-making it optimal for space-constrained, thermally sensitive low-side switching and linear regulation where exact polarity and thermal performance are primary constraints.

Availability

BSR41,115 is available at Aetrix Electronics and suitable for linear voltage regulators, low-side switches, and battery-driven devices requiring stable component supply and consistent SOT89 packaging across production batches.

Supply support for BSR41,115 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

Nexperia is a global semiconductor expert focused on essential efficiency-enhancing components, with leadership in logic, discrete, and MOSFET technologies for automotive, industrial, and consumer markets.

BSR41,115 belongs to Nexperia's general-purpose bipolar transistor product line, engineered for cost-effective, thermally robust switching and amplification in non-automotive industrial and portable power systems.

FAQ

What is the maximum allowable junction temperature for BSR41,115?

The absolute maximum junction temperature (T_j) is 150 °C per IEC 60134. Operation at this limit requires strict thermal design: use of ≥6 cm² copper pad, minimal ambient rise, and derating above 25 °C ambient. Exceeding this value risks permanent parametric shift or failure.

Can BSR41,115 be used in avalanche mode?

No-BSR41,115 is not rated or characterized for avalanche energy handling. Its V_CEO = 60 V and V_CBO = 70 V define safe operating limits only; operation beyond V_CEO may cause irreversible breakdown. Snubber networks or clamping diodes are required for inductive load protection.

Is the SOT89 package lead-free and RoHS compliant?

Yes-BSR41,115 is manufactured in accordance with Nexperia's standard RoHS-compliant processes. The SOT89 package uses lead-free terminations and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), allowing unlimited floor life at ≤30 °C/60% RH.

How does base current affect saturation performance?

Saturation is guaranteed when I_B ≥ I_C/10 (i.e., ≥100 mA for 1 A load). At I_C = 500 mA, datasheet specifies V_CE(sat) ≤ 500 mV with I_B = 50 mA (h_FE ≥ 10). Lower base drive increases V_CE(sat) and conduction loss, risking thermal runaway under sustained load.

BSR41,115 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: TO-243AA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN

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

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

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

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

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

Power - Max:: 1.35 W

Frequency - Transition:: 100MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89

BSR41,115 FAQ

1.How can I place an order for BSR41,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for BSR41,115 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 BSR41,115 reliable?

The price and inventory of BSR41,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BSR41,115 is usually 5 days.

3.What payment methods are accepted for BSR41,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BSR41,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BSR41,115?

BSR41,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BSR41,115 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 BSR41,115?

For technical support, including BSR41,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BSR41,115 requirements.

6.How does Aetrix verify that BSR41,115 is sourced from the original manufacturer or authorized distributors?

All BSR41,115 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 BSR41,115 meets industry standards.

7.What is the process for return or replacement of BSR41,115?

All BSR41,115 units undergo pre-shipment inspection (PSI). If there is an issue with BSR41,115, 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 BSR41,115 part is unused and in its original packaging.

Return procedure for BSR41,115:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…