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

onsemi MPSA13RLRAG

Name: MPSA13RLRAG
Brand: onsemi
SKU: MPSA13RLRAG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPSA13RLRAG

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-226-3, TO-92-3 Long Body, Formed Leads

Datasheet:: MPSA13RLRAG.pdf

Description:: TRANS NPN DARL 30V 0.5A TO92

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Product details

Overview

MPSA13RLRAG from ON Semiconductor is an NPN Darlington transistor designed for high-current-switching applications requiring extremely high DC current gain (h_FE = 5,000–10,000) at collector currents up to 1.0 A, with V_CE(sat) ≤ 1.5 V at I_C = 100 mA / I_B = 0.1 mA, housed in a TO-92 package. It is commonly used in relay drivers, lamp drivers, and low-frequency power switching circuits.

For engineers reviewing the MPSA13RLRAG datasheet, pinout, applications, or equivalent options, key selection criteria include its Darlington architecture for high gain, 30 V V_CE_S/V_CB_O rating, 1.2 A continuous collector current capability, thermal resistance of 200 °C/W (J-A), and TO-92 mechanical compatibility in legacy through-hole designs.

Technical Context

The MPSA13RLRAG implements a monolithic NPN Darlington pair-two cascaded NPN transistors on a single die-with base-emitter resistor biasing internal to the second stage. Its high h_FE enables direct drive from low-current logic sources (e.g., microcontroller GPIO), while its 30 V breakdown ratings support operation in 24 V industrial control rails.

Thermal performance is defined for FR-4 PCB mounting (1.6″ × 1.6″ × 0.06″), with R_θJA = 200 °C/W and P_D = 625 mW at T_A = 25 °C, derating linearly at 5.0 mW/°C above ambient. It is not rated for RF or high-speed switching-f_T is specified only at 125 MHz under small-signal conditions (I_C = 10 mA, V_CE = 10 V).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CE_S	30 V - Maximum safe collector-emitter voltage before breakdown; sets upper limit for 24 V system rail switching with margin.
I_C (continuous)	1.2 A - Sustained collector current capability; supports relay coils and incandescent lamps drawing ≤1 A.
h_FE	5,000–10,000 - Darlington DC current gain at V_CE = 5 V; allows µC GPIO (≤5 mA) to switch ≥50 mA loads directly.
V_CE(sat)	1.5 V max @ I_C = 100 mA, I_B = 0.1 mA - Low saturation voltage reduces power loss and heat generation in switching mode.
P_D	625 mW @ 25 °C - Total power dissipation limit; requires heatsinking or derating above ambient 25 °C.
R_θJA	200 °C/W - Junction-to-ambient thermal resistance on standard FR-4 board; defines temperature rise per watt dissipated.

Pinout & Package

Package: TO-92 - Standard 3-lead through-hole plastic package with 0.1" lead pitch, compatible with legacy manual assembly and wave soldering.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Emitter of Darlington pair	Common emitter node; connects to ground or low-side return path in switching configurations.
2 (Base)	Input control terminal	Drives the first transistor's base; requires current-limiting resistor when driven from logic-level sources.
3 (Collector)	Output current sink	Connects to load high-side (e.g., relay coil positive); carries full load current in saturated switch mode.

Key Features

Feature	Design Value
High DC current gain	h_FE ≥ 5,000 at I_C = 10 mA - Enables direct interface with low-drive-strength controllers without external pre-driver stages.
Low V_CE(sat)	1.5 V max - Minimizes conduction loss and self-heating during extended on-time operation.
Robust voltage ratings	V_CE_S/V_CB_O = 30 V - Supports 24 V nominal systems with safety margin against transients and ripple.
TO-92 mechanical standardization	Industry-standard footprint and lead form - Ensures drop-in replacement in existing through-hole PCB layouts and test fixtures.

Applications

Relay Driver Circuit	Lamp and LED Array Driver
Use Scenario: Driving 12–24 V electromagnetic relays with coil currents of 50–500 mA in industrial PLC I/O modules. IC Role / Device Role / Timing Role: High-gain current amplifier acting as a low-side switch, interfacing microcontroller GPIO to relay coil. Use Value: Eliminates need for discrete pre-driver transistors; simplifies BOM and layout while maintaining fast turn-on/turn-off response for relay actuation.	Use Scenario: Switching incandescent indicator lamps or high-brightness LED strings in automotive dashboards and appliance panels. IC Role / Device Role / Timing Role: Constant-current-capable saturated switch controlling load current path to ground. Use Value: Delivers stable on-state performance across temperature with minimal V_CE(sat) drift, reducing thermal runaway risk in multi-lamp arrays.
DC Motor Starter Stage	Power Supply Enable Switch
Use Scenario: Enabling brushed DC motors (≤1 A stall current) in battery-powered tools and actuators via microcontroller command. IC Role / Device Role / Timing Role: Low-side enable switch placed between motor ground and system GND. Use Value: Provides sufficient h_FE to drive motor start surge with minimal base drive current, improving overall system efficiency.	Use Scenario: Controlling auxiliary power rail activation (e.g., +5 V standby → +12 V main) in embedded power management subsystems. IC Role / Device Role / Timing Role: Logic-controlled pass element enabling/disabling downstream regulators or converters. Use Value: Offers clean, low-leakage off-state (I_CBO ≤ 100 nA) and robust V_EB_O = 10 V rating for reverse-bias safety during rail sequencing.

Relay Driver Circuit

Lamp and LED Array Driver

Use Scenario: Driving 12–24 V electromagnetic relays with coil currents of 50–500 mA in industrial PLC I/O modules.

IC Role / Device Role / Timing Role: High-gain current amplifier acting as a low-side switch, interfacing microcontroller GPIO to relay coil.

Use Value: Eliminates need for discrete pre-driver transistors; simplifies BOM and layout while maintaining fast turn-on/turn-off response for relay actuation.

Use Scenario: Switching incandescent indicator lamps or high-brightness LED strings in automotive dashboards and appliance panels.

IC Role / Device Role / Timing Role: Constant-current-capable saturated switch controlling load current path to ground.

Use Value: Delivers stable on-state performance across temperature with minimal V_CE(sat) drift, reducing thermal runaway risk in multi-lamp arrays.

DC Motor Starter Stage

Power Supply Enable Switch

Use Scenario: Enabling brushed DC motors (≤1 A stall current) in battery-powered tools and actuators via microcontroller command.

IC Role / Device Role / Timing Role: Low-side enable switch placed between motor ground and system GND.

Use Value: Provides sufficient h_FE to drive motor start surge with minimal base drive current, improving overall system efficiency.

Use Scenario: Controlling auxiliary power rail activation (e.g., +5 V standby → +12 V main) in embedded power management subsystems.

IC Role / Device Role / Timing Role: Logic-controlled pass element enabling/disabling downstream regulators or converters.

Use Value: Offers clean, low-leakage off-state (I_CBO ≤ 100 nA) and robust V_EB_O = 10 V rating for reverse-bias safety during rail sequencing.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN Darlington transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MPSA14RLRAG	Same TO-92 package; higher V_CE_S/V_CB_O = 40 V; identical h_FE range and pinout.	Preferred where 36 V transient immunity or 30 V nominal rail operation is required.	Select MPSA14RLRAG if system voltage exceeds 30 V or higher breakdown margin is mandated by safety standards.
ULN2003A	7-channel Darlington array in SO-16; includes integrated base resistors and clamp diodes; not pin-compatible.	Used in multi-load digital output drivers (e.g., stepper motor phases, solenoid banks); requires PCB redesign.	Choose ULN2003A only when driving ≥2 independent loads simultaneously and space-constrained surface-mount layout is acceptable.

Compared with MPSA13RLRAG, MPSA14RLRAG offers higher voltage tolerance without sacrificing gain or package fit, while ULN2003A trades single-device simplicity for multi-channel integration and built-in protection-neither is a drop-in replacement, but both serve overlapping high-gain switching roles in different architectural contexts.

Availability

MPSA13RLRAG is available at Aetrix Electronics and suitable for relay driver circuits, lamp control modules, DC motor starter stages, and power supply enable switches requiring stable component supply and long-term industrial availability.

Supply support for MPSA13RLRAG 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

ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, sensor, and logic solutions for automotive, industrial, cloud computing, and consumer markets.

The MPSA13RLRAG belongs to ON Semiconductor's general-purpose bipolar transistor product line, engineered for cost-sensitive, high-reliability linear and switching applications in legacy and new industrial control hardware.

FAQ

What is the maximum continuous collector current rating for MPSA13RLRAG?

The MPSA13RLRAG is rated for a continuous collector current (I_C) of 1.2 A at T_A = 25 °C. This rating assumes proper PCB thermal management-derating applies above ambient temperature, with a linear reduction of 5.0 mW/°C beyond 25 °C. Actual usable current depends on layout, ambient temperature, and duty cycle; sustained 1.2 A operation requires careful thermal design due to its 200 °C/W junction-to-ambient resistance.

Does MPSA13RLRAG have integrated base resistors?

No, the MPSA13RLRAG does not include integrated base resistors. It is a bare Darlington transistor requiring an external current-limiting resistor between the driving source (e.g., microcontroller GPIO) and its base terminal (Pin 2). This allows flexible biasing for varying load conditions but mandates careful resistor selection to ensure adequate base drive without overdriving the input stage.

Can MPSA13RLRAG be used in switching power supplies?

The MPSA13RLRAG is not recommended for switching power supply applications. Its f_T of 125 MHz is measured under small-signal conditions and does not reflect switching speed in hard-saturation; it exhibits relatively slow turn-off due to minority carrier storage in the Darlington structure. For SMPS use, dedicated power switches (e.g., MOSFETs or faster BJTs like MMBT5551) with specified t_f, t_r, and Q_g are appropriate instead of MPSA13RLRAG.

What is the emitter-base breakdown voltage (V_EB_O) of MPSA13RLRAG?

The emitter-base breakdown voltage (V_EB_O) of the MPSA13RLRAG is 10 V, tested with IC = 0 and V_EB applied in reverse. This rating is critical when using the device in configurations where the base may be pulled below emitter potential (e.g., during logic transitions or noise coupling), and must be respected to avoid junction damage or parametric shift.

Is MPSA13RLRAG RoHS compliant and halogen-free?

Yes, MPSA13RLRAG is RoHS compliant and halogen-free per ON Semiconductor's product change notices and material declarations. The device meets EU Directive 2011/65/EU and subsequent amendments, with lead content below 1000 ppm and bromine/chlorine content below 900 ppm per homogeneous material. Full compliance documentation is available via ON Semiconductor's website under the part's product page.

MPSA13RLRAG Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-226-3, TO-92-3 Long Body, Formed Leads

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: NPN - Darlington

Current - Collector (Ic) (Max):: 500 mA

Voltage - Collector Emitter Breakdown (Max):: 30 V

Vce Saturation (Max) @ Ib, Ic:: 1.5V @ 100µA, 100mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 10000 @ 100mA, 5V

Power - Max:: 625 mW

Frequency - Transition:: 125MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92 (TO-226)

MPSA13RLRAG FAQ

1.How can I place an order for MPSA13RLRAG through Aetrix?

Please submit a Request for Quotation (RFQ) for MPSA13RLRAG 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 MPSA13RLRAG reliable?

The price and inventory of MPSA13RLRAG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPSA13RLRAG is usually 5 days.

3.What payment methods are accepted for MPSA13RLRAG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPSA13RLRAG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPSA13RLRAG?

MPSA13RLRAG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPSA13RLRAG 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 MPSA13RLRAG?

For technical support, including MPSA13RLRAG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPSA13RLRAG requirements.

6.How does Aetrix verify that MPSA13RLRAG is sourced from the original manufacturer or authorized distributors?

All MPSA13RLRAG 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 MPSA13RLRAG meets industry standards.

7.What is the process for return or replacement of MPSA13RLRAG?

All MPSA13RLRAG units undergo pre-shipment inspection (PSI). If there is an issue with MPSA13RLRAG, 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 MPSA13RLRAG part is unused and in its original packaging.

Return procedure for MPSA13RLRAG:

1.Submit a request within 90 days.

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

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