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

onsemi BD37716STU

Name: BD37716STU
Brand: onsemi
SKU: BD37716STU
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BD37716STU

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-225AA, TO-126-3

Datasheet:: BD37716STU.pdf

Description:: TRANS NPN 60V 2A TO-126-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BD37716STU from Fairchild Semiconductor is an NPN epitaxial silicon transistor in TO-126 package, rated for 60 V V_CEO, 2 A DC collector current, and 25 W power dissipation at T_C = 25°C, with h_FE of 100–250 at I_C = 0.15 A, used in medium-power linear amplification and switching applications such as audio output stages and relay drivers.

For engineers reviewing the BD37716STU datasheet, pinout, applications, or equivalent options, key selection criteria include V_CEO = 60 V, I_C = 2 A, h_FE classification (16), V_CE(sat) ≤ 1 V at I_C = 1 A / I_B = 0.1 A, and TO-126 thermal performance under continuous conduction.

Technical Context

This device operates as a medium-power bipolar junction transistor optimized for linear and switching use where moderate voltage headroom and stable DC gain are required. It features a V_CEO(sus) of 60 V at I_C = 100 mA with zero base current, and exhibits t_ON = 50 ns and t_OFF = 500 ns under defined resistive-switching conditions (V_CC = 30 V, R_L = 60 Ω).

The BD37716STU shares the BD377 family's absolute maximum ratings and electrical characteristics, including V_CBO = 75 V, V_EBO = 5 V, and junction temperature limit of 150°C. Its h_FE classification "16" corresponds to a DC current gain range of 100–250 at V_CE = 2 V and I_C = 0.15 A.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	60 V - Maximum continuous collector-emitter voltage before breakdown; defines safe operating voltage ceiling in switching or amplifier configurations.
I_C (DC)	2 A - Maximum steady-state collector current; determines load-driving capability in linear regulators or motor control stages.
P_C @ T_C=25°C	25 W - Continuous power dissipation at case temperature 25°C; requires heatsinking above ~40°C ambient per derating curve.
h_FE Class	16 - DC current gain bin 100–250 at V_CE = 2 V, I_C = 0.15 A; enables predictable biasing in Class-A/B amplifiers.
V_CE(sat)	≤1 V @ I_C=1 A, I_B=0.1 A - Low saturation voltage minimizes conduction loss in saturated-switch applications like solenoid drivers.
t_OFF	500 ns - Turn-off delay under pulsed resistive load; constrains maximum switching frequency in PWM circuits.

Pinout & Package

BD37716STU is housed in a TO-126 plastic package with integral metal tab for heatsinking. Pin 1 is Emitter, Pin 2 is Collector (connected to tab), Pin 3 is Base - verified per Fairchild package drawing Rev. A, February 2000.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current exit path from transistor	Connected to ground or low-side return; must handle full load current and be routed with low-inductance layout.
2 (Collector)	Current entry path into transistor	Internally bonded to metal tab; electrically common with heatsink mounting surface - requires isolation if heatsink is grounded.
3 (Base)	Control terminal for minority-carrier injection	Drives transistor into active/saturation via current-limited source; requires series resistor to limit I_B ≤ 1 A peak.

Key Features

Feature	Design Value
Medium-power linear & switching operation	Validated by SOA curves up to 60 V / 2 A with safe second breakdown margin at T_C ≤ 100°C.
h_FE classification "16"	Guarantees DC current gain between 100–250, enabling consistent bias point setting without individual unit trimming.
V_CE(sat) ≤ 1 V @ 1 A	Reduces conduction loss to ≤1 W in saturated switch mode, improving thermal efficiency in relay or lamp driver designs.
TO-126 package with metal tab	Enables direct mechanical and thermal attachment to heatsinks; tab-to-collector connection simplifies thermal path but mandates electrical isolation planning.

Applications

Audio Power Amplifier Output Stage	DC Motor Speed Control
Use Scenario: Final push-pull stage in 5–15 W class-AB audio amplifiers driving 4–8 Ω speakers. IC Role / Device Role / Timing Role: NPN output transistor delivering linear current amplification with low distortion and thermal stability. Use Value: V_CEO = 60 V provides sufficient rail margin for ±24 V supplies; h_FE bin 16 ensures matched gain across complementary pairs.	Use Scenario: High-side or low-side switch controlling brushed DC motors in industrial actuators (12–48 V, <2 A). IC Role / Device Role / Timing Role: Saturated BJT switch turning motor current on/off under microcontroller PWM command. Use Value: V_CE(sat) ≤ 1 V limits I²R loss to <1 W at 1 A, reducing heatsink requirements versus higher-V_sat alternatives.
Relay Driver Circuit	Linear Voltage Regulator Pass Element
Use Scenario: Driving 12–24 V, 100–500 mA coil relays in PLC I/O modules and building automation panels. IC Role / Device Role / Timing Role: Switching transistor providing galvanically isolated coil energization via optocoupler or logic-level base drive. Use Value: I_C = 2 A rating accommodates relay inrush currents >1.5× steady-state; t_OFF = 500 ns prevents contact chatter during rapid cycling.	Use Scenario: Series pass element in adjustable linear regulators delivering up to 1.5 A at 3–12 V output with 24 V input. IC Role / Device Role / Timing Role: Continuously biased BJT dissipating excess input-output differential as heat. Use Value: P_C = 25 W at T_C = 25°C supports ≥10 W dissipation with modest heatsinking; SOA graph confirms safe operation at V_IN–V_OUT = 15 V, I_OUT = 1 A.

Audio Power Amplifier Output Stage

DC Motor Speed Control

Use Scenario: Final push-pull stage in 5–15 W class-AB audio amplifiers driving 4–8 Ω speakers.

IC Role / Device Role / Timing Role: NPN output transistor delivering linear current amplification with low distortion and thermal stability.

Use Value: V_CEO = 60 V provides sufficient rail margin for ±24 V supplies; h_FE bin 16 ensures matched gain across complementary pairs.

Use Scenario: High-side or low-side switch controlling brushed DC motors in industrial actuators (12–48 V, <2 A).

IC Role / Device Role / Timing Role: Saturated BJT switch turning motor current on/off under microcontroller PWM command.

Use Value: V_CE(sat) ≤ 1 V limits I²R loss to <1 W at 1 A, reducing heatsink requirements versus higher-V_sat alternatives.

Relay Driver Circuit

Linear Voltage Regulator Pass Element

Use Scenario: Driving 12–24 V, 100–500 mA coil relays in PLC I/O modules and building automation panels.

IC Role / Device Role / Timing Role: Switching transistor providing galvanically isolated coil energization via optocoupler or logic-level base drive.

Use Value: I_C = 2 A rating accommodates relay inrush currents >1.5× steady-state; t_OFF = 500 ns prevents contact chatter during rapid cycling.

Use Scenario: Series pass element in adjustable linear regulators delivering up to 1.5 A at 3–12 V output with 24 V input.

IC Role / Device Role / Timing Role: Continuously biased BJT dissipating excess input-output differential as heat.

Use Value: P_C = 25 W at T_C = 25°C supports ≥10 W dissipation with modest heatsinking; SOA graph confirms safe operation at V_IN–V_OUT = 15 V, I_OUT = 1 A.

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
MJD31C	V_CEO = 100 V, I_C = 3 A, TO-220 package, h_FE min 10, no h_FE binning	Higher voltage margin and current rating; larger footprint and different pinout	Select when >60 V rail or >2 A peak load is required; verify PCB layout compatibility.
BD377G	Same die, same specs, but in TO-92 package - lower P_C (0.5 W) and no metal tab	Only suitable for signal-level or low-power switching; not interchangeable thermally or mechanically	Use only in non-power applications; not a drop-in replacement for BD37716STU.

Compared with MJD31C and BD377G, BD37716STU offers optimal balance of voltage rating (60 V), thermal capability (TO-126, 25 W), and guaranteed h_FE binning for analog linearity - making it preferred for cost-sensitive medium-power linear and switching roles where TO-126 mounting is standard.

Availability

BD37716STU is available at Aetrix Electronics and suitable for audio amplifier output stages, DC motor speed control, relay driver circuits, and linear voltage regulator pass elements requiring stable component supply and long-term industrial availability.

Supply support for BD37716STU 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

Fairchild Semiconductor was a U.S.-based semiconductor manufacturer specializing in power discrete devices, analog ICs, and interface solutions before its acquisition by ON Semiconductor in 2016.

The BD37716STU belongs to Fairchild's BD375/377/379 medium-power NPN transistor family, designed specifically for robust linear amplification and industrial-grade switching where reliability, thermal stability, and consistent h_FE binning are critical.

FAQ

What is the pin configuration of BD37716STU?

BD37716STU uses a TO-126 package with three leads: Pin 1 is Emitter, Pin 2 is Collector (internally connected to the metal tab), and Pin 3 is Base. This configuration is confirmed in Fairchild's Rev. A datasheet and matches standard TO-126 mechanical drawings. The collector-tab connection requires electrical isolation from the heatsink unless the heatsink is floating or referenced to collector potential.

What does the "16" in BD37716STU signify?

The "16" in BD37716STU denotes its h_FE classification bin, indicating a guaranteed DC current gain range of 100–250 at V_CE = 2 V and I_C = 0.15 A. This binning enables predictable biasing in amplifier and switching circuits without unit-by-unit characterization. BD37716STU is distinct from BD37710STU (bin 10, h_FE 63–160) and BD37725STU (bin 25, h_FE 150–375).

Is BD37716STU suitable for switching applications?

Yes, BD37716STU is explicitly rated for both linear and switching use. Its t_ON = 50 ns and t_OFF = 500 ns, V_CE(sat) ≤ 1 V at I_C = 1 A / I_B = 0.1 A, and SOA compliance up to 60 V / 2 A confirm suitability for medium-speed switching tasks such as relay driving, PWM motor control, and lamp dimming - provided adequate base drive and heatsinking are applied.

What is the maximum junction temperature for BD37716STU?

The maximum junction temperature (T_J) for BD37716STU is 150°C, as specified in the Absolute Maximum Ratings table of the Fairchild datasheet. Operation above this temperature risks permanent degradation. Derating begins at T_C > 25°C per the Power Derating curve, with P_C reduced linearly to zero at T_C = 175°C.

Can BD37716STU replace BD377 in existing designs?

Yes, BD37716STU is a variant of the BD377 family with identical absolute maximum ratings, electrical characteristics, and TO-126 packaging. The "16" suffix specifies h_FE binning but does not alter pinout, thermal behavior, or voltage/current limits. Therefore, BD37716STU is a direct functional and mechanical replacement for any BD377 part requiring h_FE = 100–250, and may improve consistency in bias-critical applications.

BD37716STU Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-225AA, TO-126-3

Packaging:: Tube

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 2 A

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

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

Current - Collector Cutoff (Max):: 2µA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 150mA, 2V

Power - Max:: 25 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-126-3

BD37716STU FAQ

1.How can I place an order for BD37716STU through Aetrix?

Please submit a Request for Quotation (RFQ) for BD37716STU 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 BD37716STU reliable?

The price and inventory of BD37716STU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BD37716STU is usually 5 days.

3.What payment methods are accepted for BD37716STU?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BD37716STU transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BD37716STU?

BD37716STU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BD37716STU 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 BD37716STU?

For technical support, including BD37716STU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BD37716STU requirements.

6.How does Aetrix verify that BD37716STU is sourced from the original manufacturer or authorized distributors?

All BD37716STU 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 BD37716STU meets industry standards.

7.What is the process for return or replacement of BD37716STU?

All BD37716STU units undergo pre-shipment inspection (PSI). If there is an issue with BD37716STU, 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 BD37716STU part is unused and in its original packaging.

Return procedure for BD37716STU:

1.Submit a request within 90 days.

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

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