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

onsemi NSVMSD1819A-RT1G

Name: NSVMSD1819A-RT1G
Brand: onsemi
SKU: NSVMSD1819A-RT1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NSVMSD1819A-RT1G

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: SC-70, SOT-323

Datasheet:: NSVMSD1819A-RT1G.pdf

Description:: TRANS NPN 50V 0.1A SC70-3

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Product details

Overview

NSVMSD1819A-RT1G from onsemi is an NPN silicon epitaxial planar transistor designed for general-purpose amplifier applications in automotive and industrial systems. It delivers DC current gain (h_FE) of 210–460 at I_C = 2 mA, V_CE(sat) < 0.5 V at I_C = 100 mA/I_B = 10 mA, and operates up to 150 °C junction temperature in the SC-70 (SOT-323) package.

For engineers reviewing the NSVMSD1819A-RT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q101 qualification, low saturation voltage, high h_FE range, moisture sensitivity level 1 rating, and Pb-free/RoHS-compliant SC-70 footprint for space-constrained analog signal amplification.

Technical Context

This NPN transistor uses epitaxial planar construction to achieve stable gain across temperature and bias conditions. Its design supports linear amplification with V_(BR)CEO = 50 V, V_(BR)CBO = 60 V, and V_(BR)EBO = 7.0 V - enabling operation in low-to-moderate voltage analog stages where breakdown margin and leakage control are critical.

The device is optimized for surface-mount reliability in automotive environments: it meets AEC-Q101 stress testing requirements, features ESD protection >4000 V HBM / >400 V MM, and is qualified for PPAP-controlled production. Its thermal resistance (R_JA = 833 °C/W) reflects FR-4 board mounting per JEDEC standard footprint.

Key Specifications

Parameter	Value and Actual Design Meaning
V_(BR)CEO	50 V - Ensures safe operation in 24 V automotive supply rails with headroom for transients.
h_FE (I_C = 2 mA)	210–460 - Enables precise biasing and predictable small-signal gain in amplifier feedback networks.
V_CE(sat)	< 0.5 V at I_C/I_B = 10 - Minimizes power loss and self-heating in switching or saturated-mode driver stages.
P_D	150 mW - Defines maximum continuous dissipation on standard FR-4 PCB with minimum footprint.
T_J max	150 °C - Supports under-hood and industrial ambient operation without derating below 100 °C ambient.
ESD HBM	> 4000 V - Reduces risk of handling damage during SMT assembly and board-level test.

Pinout & Package

NSVMSD1819A-RT1G is housed in the SC-70 (SOT-323) plastic surface-mount package (Case 419, Style 3), measuring 2.2 mm × 2.2 mm × 1.1 mm with gull-wing leads. This compact, moisture-sensitive level 1 package supports automated placement and reflow soldering in high-volume automotive electronics.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal for forward-biased junction; requires current-limited drive to maintain linear amplification region.
2	Emitter	Common reference node in common-emitter configuration; connects to ground or low-impedance return path.
3	Collector	Output terminal carrying amplified current; connects to load or next-stage input with appropriate pull-up or bias network.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per JESD47.
High h_FE range (210–460)	Reduces base drive current variation across production lots, simplifying bias network design in discrete amplifiers.
V_CE(sat) < 0.5 V	Enables efficient operation in emitter-follower or saturated-switch configurations with minimal voltage drop.
Moisture Sensitivity Level 1	Eliminates bake preconditioning before reflow, reducing manufacturing cost and cycle time for SMT lines.

Applications

Automotive Cabin Sensors	Industrial Signal Conditioning
Use Scenario: Amplifying low-level analog outputs from temperature, pressure, or position sensors in vehicle cabin modules. IC Role / Device Role / Timing Role: Discrete NPN amplifier in common-emitter configuration providing 20–40 dB voltage gain with DC coupling. Use Value: Stable h_FE and low V_CE(sat) ensure consistent gain and minimal offset drift over −40 °C to +125 °C operating range.	Use Scenario: Buffering and level-shifting analog signals between legacy 5 V sensor interfaces and modern 3.3 V ADC inputs. IC Role / Device Role / Timing Role: Emitter-follower configured transistor delivering unity-gain, low-output-impedance signal replication. Use Value: Low saturation voltage and high current gain enable accurate DC-coupled buffering without added op-amps.
LED Driver Bias Stage	Power Supply Feedback Loop
Use Scenario: Providing precise base current to high-side LED driver transistors in interior lighting control units. IC Role / Device Role / Timing Role: Current source element regulating LED string current via controlled collector current. Use Value: Tight h_FE distribution and low V_CE(sat) minimize current error and thermal rise in constant-current topology.	Use Scenario: Implementing optocoupler-based feedback in isolated DC-DC converters for automotive infotainment power supplies. IC Role / Device Role / Timing Role: Transistor switch driving optocoupler LED to regulate secondary-side output voltage. Use Value: AEC-Q101 qualification and 150 °C T_J support reliable closed-loop regulation in thermally demanding power stages.

Automotive Cabin Sensors

Industrial Signal Conditioning

Use Scenario: Amplifying low-level analog outputs from temperature, pressure, or position sensors in vehicle cabin modules.

IC Role / Device Role / Timing Role: Discrete NPN amplifier in common-emitter configuration providing 20–40 dB voltage gain with DC coupling.

Use Value: Stable h_FE and low V_CE(sat) ensure consistent gain and minimal offset drift over −40 °C to +125 °C operating range.

Use Scenario: Buffering and level-shifting analog signals between legacy 5 V sensor interfaces and modern 3.3 V ADC inputs.

IC Role / Device Role / Timing Role: Emitter-follower configured transistor delivering unity-gain, low-output-impedance signal replication.

Use Value: Low saturation voltage and high current gain enable accurate DC-coupled buffering without added op-amps.

LED Driver Bias Stage

Power Supply Feedback Loop

Use Scenario: Providing precise base current to high-side LED driver transistors in interior lighting control units.

IC Role / Device Role / Timing Role: Current source element regulating LED string current via controlled collector current.

Use Value: Tight h_FE distribution and low V_CE(sat) minimize current error and thermal rise in constant-current topology.

Use Scenario: Implementing optocoupler-based feedback in isolated DC-DC converters for automotive infotainment power supplies.

IC Role / Device Role / Timing Role: Transistor switch driving optocoupler LED to regulate secondary-side output voltage.

Use Value: AEC-Q101 qualification and 150 °C T_J support reliable closed-loop regulation in thermally demanding power stages.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN general-purpose amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT3904LT1G	Lower h_FE (100–300), higher V_CE(sat) (0.2–0.3 V typical but not guaranteed ≤0.5 V at full spec), same SC-70 package.	Not AEC-Q101 qualified; suitable for commercial-grade signal amplification only.	Select when automotive qualification is unnecessary and cost is prioritized over gain consistency.
BC847B,215	h_FE 200–450, V_CE(sat) ≤ 0.6 V, same SC-70, but rated only to 100 °C T_J and not AEC-Q101 qualified.	Lacks automotive stress validation; limited to industrial or consumer applications with lower ambient demands.	Choose for non-automotive designs requiring similar gain and package compatibility without extended temperature or reliability validation.

Compared with MMBT3904LT1G and BC847B,215, NSVMSD1819A-RT1G provides verified AEC-Q101 compliance, guaranteed V_CE(sat) < 0.5 V at full rated current, and 150 °C junction capability - making it the only option qualified for under-hood and safety-critical signal amplification where long-term parametric stability is mandatory.

Availability

NSVMSD1819A-RT1G is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial signal conditioning, LED driver bias stages, and power supply feedback loops requiring stable component supply, traceable sourcing, and lifecycle continuity.

Supply support for NSVMSD1819A-RT1G 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 for automotive, industrial, cloud, and IoT applications.

The MSD1819A family is engineered for general-purpose amplification in harsh-environment electronics, with the NSV prefix denoting automotive-specific process controls, site traceability, and PPAP-capable manufacturing.

FAQ

What is the maximum junction temperature rating for NSVMSD1819A-RT1G?

The NSVMSD1819A-RT1G has a maximum junction temperature (T_J) of 150 °C, validated per its AEC-Q101 qualification. This allows reliable operation in under-hood automotive environments and high-ambient industrial settings without derating until ambient exceeds ~100 °C on standard FR-4 PCBs. The NSVMSD1819A-RT1G's thermal performance is specified with R_JA = 833 °C/W under JEDEC-standard mounting conditions.

Is NSVMSD1819A-RT1G pin-compatible with standard SOT-323 NPN transistors like MMBT3904?

Yes, NSVMSD1819A-RT1G uses the SC-70 (SOT-323) package with pin 1 = Base, pin 2 = Emitter, pin 3 = Collector - matching the industry-standard pinout for SOT-323 NPN devices. However, while mechanically compatible, NSVMSD1819A-RT1G is not a drop-in replacement due to its AEC-Q101 qualification, tighter h_FE range, and guaranteed V_CE(sat) < 0.5 V, which may affect biasing in legacy designs.

Does NSVMSD1819A-RT1G meet RoHS and halogen-free requirements?

Yes, NSVMSD1819A-RT1G is Pb-free, halogen-free/BFR-free, and fully RoHS compliant per the onsemi datasheet revision 11 (October 2025). The "G" suffix explicitly denotes Pb-free packaging, and the NSV prefix confirms adherence to automotive material declaration standards including IMDS and ELV compliance.

What is the ESD robustness specification for NSVMSD1819A-RT1G?

NSVMSD1819A-RT1G provides ESD protection rated >4000 V per Human Body Model (HBM) and >400 V per Machine Model (MM), as confirmed in the official onsemi datasheet. This level of protection reduces susceptibility to damage during automated SMT handling and board-level functional testing, supporting high-yield manufacturing without additional ESD safeguards.

Can NSVMSD1819A-RT1G be used in linear amplifier configurations?

Yes, NSVMSD1819A-RT1G is explicitly designed for general-purpose amplifier applications, with documented h_FE linearity across I_C = 1 mA to 100 mA and V_CE = 2–10 V. Its epitaxial planar structure ensures stable gain and low distortion in common-emitter and emitter-follower topologies, making NSVMSD1819A-RT1G suitable for analog signal conditioning in automotive and industrial systems.

NSVMSD1819A-RT1G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: SC-70, SOT-323

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 100 mA

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

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 10mA, 100mA

Current - Collector Cutoff (Max):: 100nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 210 @ 2mA, 10V

Power - Max:: 150 mW

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SC-70-3 (SOT323)

NSVMSD1819A-RT1G FAQ

1.How can I place an order for NSVMSD1819A-RT1G through Aetrix?

Please submit a Request for Quotation (RFQ) for NSVMSD1819A-RT1G 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 NSVMSD1819A-RT1G reliable?

The price and inventory of NSVMSD1819A-RT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NSVMSD1819A-RT1G is usually 5 days.

3.What payment methods are accepted for NSVMSD1819A-RT1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NSVMSD1819A-RT1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NSVMSD1819A-RT1G?

NSVMSD1819A-RT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NSVMSD1819A-RT1G 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 NSVMSD1819A-RT1G?

For technical support, including NSVMSD1819A-RT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NSVMSD1819A-RT1G requirements.

6.How does Aetrix verify that NSVMSD1819A-RT1G is sourced from the original manufacturer or authorized distributors?

All NSVMSD1819A-RT1G 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 NSVMSD1819A-RT1G meets industry standards.

7.What is the process for return or replacement of NSVMSD1819A-RT1G?

All NSVMSD1819A-RT1G units undergo pre-shipment inspection (PSI). If there is an issue with NSVMSD1819A-RT1G, 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 NSVMSD1819A-RT1G part is unused and in its original packaging.

Return procedure for NSVMSD1819A-RT1G:

1.Submit a request within 90 days.

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

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