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

Nexperia USA Inc. BSR19A,215

Name: BSR19A,215
Brand: Nexperia USA Inc.
SKU: BSR19A,215
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BSR19A,215

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

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

Datasheet:: BSR19A,215.pdf

Description:: TRANS NPN 160V 0.3A TO-236AB

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BSR19A from Nexperia is an NPN high-voltage bipolar junction transistor in SOT23 package, rated for 160 V V_CEO, 180 V V_CBO, and 300 mA continuous collector current. It delivers DC current gain (h_FE) of 80–250 at 5 V V_CE/1–50 mA I_C, with 300 MHz f_T, and is used in telephony line interface circuits requiring robust voltage handling and low-leakage switching.

For engineers reviewing the BSR19A datasheet, BSR19A pinout, BSR19A application, or BSR19A equivalent, key selection criteria include verified high-voltage blocking (160 V V_CEO), SOT23 footprint compatibility, h_FE consistency across 1–50 mA I_C, thermal resistance (500 K/W on FR4), and PNP complement availability (BSR20A).

Technical Context

The BSR19A operates as a general-purpose NPN switch or linear amplifier with fixed-base biasing capability, supporting open-base configurations up to 160 V. Its 100–300 MHz transition frequency enables stable operation in audio-frequency amplification and pulse-switching applications up to ~10 MHz.

Designed for non-automotive industrial and telecom use, it features 50 nA ICBO at 120 V/25 °C and 50 µA at 120 V/100 °C, confirming low leakage under high-voltage stress. The 6 pF collector capacitance and 150–200 mV V_CE(sat) at I_C/I_B = 10/1 mA and 50/5 mA support efficient low-power switching.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	160 V - supports switching in telephone line interface circuits with ring signal peaks up to 160 V
V_CBO	180 V - enables safe operation with reverse-biased base-collector junction during transient overvoltage events
I_C (continuous)	300 mA - sufficient for driving relays, LED arrays, or small solenoids in space-constrained designs
h_FE	80–250 @ 5 V/1–50 mA - provides predictable DC gain across operating range without external compensation
f_T	100–300 MHz - ensures usable bandwidth for audio amplification and fast digital switching (t_ON/t_OFF < 50 ns)
P_tot	250 mW @ T_amb ≤ 25 °C - requires thermal derating above 25 °C; 500 K/W R_th(j-a) on FR4 defines heatsinking requirements
V_CE(sat)	150–200 mV @ I_C/I_B = 10/1 mA and 50/5 mA - minimizes conduction loss in saturated-switch mode

Pinout & Package

SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch) with gull-wing leads; JEDEC TO-236AB compliant.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Control terminal for forward-active and saturation biasing; requires current-limited drive to avoid exceeding 100 mA I_Blim
2	Emiter (E)	Common reference node in common-emitter configuration; tied to ground or low-side return path
3	Collector (C)	High-voltage output node; handles up to 160 V with respect to emitter when base is open

Key Features

Feature	Design Value
High-voltage blocking	160 V V_CEO and 180 V V_CBO enable direct integration into telephone line interface and off-line power control stages
Low leakage performance	50 nA ICBO at 120 V/25 °C ensures minimal standby current in always-on telephony circuits
Stable DC gain profile	h_FE maintains ≥80 from 1 mA to 50 mA I_C, simplifying bias network design across load ranges
SOT23 footprint compatibility	Standard 3-pin SOT23 outline allows drop-in replacement in legacy PCB layouts without redesign
Thermal reliability	150 °C max junction temperature and 500 K/W R_th(j-a) on FR4 support operation in sealed enclosures up to 75 °C ambient

Applications

Telephone Line Interface

Ring Signal Detection

Use Scenario: Isolating and conditioning AC ring signals (75–105 V RMS, 20 Hz) on analog telephone lines before digitization.

IC Role / Device Role / Timing Role: NPN switch controlling optocoupler input or relay coil activation based on ring presence.

Use Value: 160 V V_CEO withstands peak ring voltages (~150 V), while 50 nA ICBO prevents false triggering during idle state.

Use Scenario: Detecting ring voltage transitions to wake up low-power microcontrollers in VoIP adapters.

IC Role / Device Role / Timing Role: High-impedance voltage-level translator converting ring signal to logic-compatible pulse.

Use Value: Stable h_FE > 80 at µA-level base currents enables reliable detection with minimal quiescent current draw.

Off-Line Power Control

LED Driver Switch

Use Scenario: Driving auxiliary MOSFET gates or optocouplers in primary-side regulation circuits for AC/DC adapters.

IC Role / Device Role / Timing Role: High-voltage level shifter translating PWM signals from low-voltage controller to high-side gate driver.

Use Value: 180 V V_CBO isolates controller side from 100–264 VAC rectified bus, preventing latch-up during transients.

Use Scenario: Switching high-brightness LED strings in industrial signage where supply rails exceed 48 V.

IC Role / Device Role / Timing Role: Low-saturation switch connecting LED cathode to ground in constant-current topology.

Use Value: 150–200 mV V_CE(sat) limits power loss to <15 mW at 100 mA, reducing thermal load on compact PCBs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN high-voltage transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC846B	V_CEO = 65 V, h_FE = 200–450, f_T = 100 MHz - lower voltage rating, higher gain spread	Not suitable for telephony ring detection; limited to ≤65 V DC/peak applications	Select only if system voltage stays below 65 V and tighter h_FE tolerance is not required
BSR16	V_CEO = 120 V, I_C = 500 mA, P_tot = 350 mW - lower voltage, higher current, larger package (SOT323)	Acceptable for 120 V systems but lacks margin for 160 V telephony peaks; requires PCB layout change	Choose when higher continuous current is needed and voltage headroom can be reduced by 40 V

Compared with BC846B and BSR16, BSR19A uniquely balances 160 V blocking, SOT23 size, and consistent h_FE across 1–50 mA-making it optimal for space-constrained telephony and off-line control where voltage margin and thermal footprint are critical.

Availability

BSR19A is available at Aetrix Electronics and suitable for telephone line interface, ring signal detection, and off-line power control requiring stable component supply, long-term manufacturability, and RoHS-compliant SMT assembly.

Supply support for BSR19A 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 high-volume, high-reliability discrete and logic devices, headquartered in Nijmegen, Netherlands.

The BSR19A belongs to Nexperia's general-purpose bipolar transistor product line, engineered for cost-sensitive, high-reliability industrial and telecom applications where voltage resilience and SMT scalability are prioritized over automotive qualification.

FAQ

What is the maximum allowable base current for continuous operation?

The BSR19A has a limiting base current (I_Blim) of 100 mA per the Absolute Maximum Ratings table. Exceeding this value risks permanent degradation of h_FE or bond wire failure. For reliable 300 mA I_C switching, typical base drive is 3–10 mA, keeping I_B well within safe margins even during transient pulses.

Can BSR19A replace BSR20A in a circuit?

No-BSR19A is NPN and BSR20A is its PNP complement; they are not interchangeable. Swapping them would invert logic polarity and likely cause circuit malfunction. The two are intended for complementary push-pull or differential pair configurations-not substitution.

Is BSR19A qualified for automotive applications?

No. Per Nexperia's revision history (v.3, Jan 2023), BSR19A is explicitly designated as non-automotive. It lacks AEC-Q101 qualification, automotive-grade screening, and extended temperature validation. Automotive designs require parts marked with "-Q" suffix (e.g., BSR19AQ) and full PPAP documentation.

How does thermal resistance vary with PCB copper area?

The published R_th(j-a) of 500 K/W assumes mounting on a standard FR4 board with minimal copper (JEDEC JESD51-2). Adding 1 cm² of 2-oz copper pour under the SOT23 pad reduces R_th(j-a) to ~220 K/W, enabling 2× higher continuous power dissipation at 25 °C ambient-verified in Nexperia's thermal application notes.

BSR19A,215 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 300 mA

Voltage - Collector Emitter Breakdown (Max):: 160 V

Vce Saturation (Max) @ Ib, Ic:: 150mV @ 1mA, 10mA

Current - Collector Cutoff (Max):: 50nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 80 @ 10mA, 5V

Power - Max:: 250 mW

Frequency - Transition:: 300MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BSR19A,215 FAQ

1.How can I place an order for BSR19A,215 through Aetrix?

Please submit a Request for Quotation (RFQ) for BSR19A,215 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 BSR19A,215 reliable?

The price and inventory of BSR19A,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BSR19A,215 is usually 5 days.

3.What payment methods are accepted for BSR19A,215?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BSR19A,215 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BSR19A,215?

BSR19A,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BSR19A,215 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 BSR19A,215?

For technical support, including BSR19A,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BSR19A,215 requirements.

6.How does Aetrix verify that BSR19A,215 is sourced from the original manufacturer or authorized distributors?

All BSR19A,215 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 BSR19A,215 meets industry standards.

7.What is the process for return or replacement of BSR19A,215?

All BSR19A,215 units undergo pre-shipment inspection (PSI). If there is an issue with BSR19A,215, 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 BSR19A,215 part is unused and in its original packaging.

Return procedure for BSR19A,215:

1.Submit a request within 90 days.

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

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