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onsemi BD1396STU
- Part No.:
- BD1396STU
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-225AA, TO-126-3
- Datasheet:
-
BD1396STU.pdf
- Description:
- TRANS NPN 80V 1.5A TO-126-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,277
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Product details
Overview
BD1396STU from Fairchild Semiconductor is an NPN epitaxial silicon power transistor in TO-126 package, rated for 80 V VCEO, 1.5 A continuous collector current, and 12.5 W device dissipation at TC = 25°C, used in medium-power linear amplification and switching applications such as audio output stages and relay drivers.
For engineers reviewing the BD1396STU datasheet, pinout, applications, or equivalent options, key selection factors include its hFE classification (63–160 at IC = 150 mA), VCE(sat) ≤ 0.5 V at IC = 500 mA / IB = 50 mA, and safe operating area validated up to 100 V / 1.5 A DC.
Technical Context
The BD1396STU operates as a single NPN bipolar junction transistor with fixed emitter-base-collector terminal configuration and no integrated biasing or protection circuitry. Its DC current gain varies from hFE ≥ 25 at IC = 5 mA to hFE ≥ 40 at IC = 150 mA, supporting both linear amplification and saturated switching modes.
It requires external base drive control and thermal management via heatsinking due to its 12.5 W maximum power dissipation at case temperature 25°C and 150°C maximum junction temperature. The device is not designed for avalanche operation or built-in transient suppression.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 80 V - Maximum collector-emitter voltage before breakdown under open-base conditions; defines upper rail limit in switching designs. |
| IC (DC) | 1.5 A - Continuous collector current rating; determines max sustained load current without thermal runaway at TC = 25°C. |
| PC (TC = 25°C) | 12.5 W - Device power dissipation limit with adequate heatsinking; requires thermal interface design for real-world PCB mounting. |
| hFE (IC = 150 mA) | 63–160 - Current gain range for Class AB audio output stage biasing; impacts base drive resistor sizing and quiescent current stability. |
| VCE(sat) | ≤ 0.5 V @ IC = 500 mA, IB = 50 mA - Low saturation voltage enables <1% conduction loss in 12 V relay driver applications. |
| TJ(max) | 150°C - Maximum junction temperature; sets thermal design margin for enclosure airflow and heatsink thermal resistance. |
Pinout & Package
BD1396STU is housed in a TO-126 (SOT-32) 3-lead plastic package with standardized mechanical dimensions per Fairchild drawing TO126AA.pdf. Leads are un-plated copper with solderable finish; case is electrically connected to collector.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal | Connected to ground or low-side return path; polarity-sensitive for NPN operation. |
| 2 (Collector) | Current source terminal | Electrically tied to package tab; must be isolated from heatsink unless heatsink is grounded. |
| 3 (Base) | Control input terminal | Receives forward-biased current to enable conduction; requires series resistor to limit IB ≤ 0.5 A. |
Key Features
| Feature | Design Value |
|---|---|
| Complementary pair | Designed as NPN counterpart to BD140 PNP transistor for push-pull amplifier stages. |
| hFE classification "6" | Guaranteed hFE range of 63–160 at IC = 150 mA, enabling predictable bias network design. |
| TO-126 package | Standardized 3-lead through-hole outline with integral heatsink tab for direct mounting to metal chassis or PCB copper pour. |
| VCEO(sus) = 80 V | Sustaining voltage matches industrial 24–48 V DC bus systems without derating for inductive kickback in relay coils. |
Applications
| Audio Power Amplifier | DC Motor Driver |
|---|---|
Use Scenario: Medium-power Class AB output stage in 5–10 W audio amplifiers driving 4–8 Ω speakers. IC Role / Device Role / Timing Role: NPN output transistor delivering peak collector current up to 1.5 A during signal peaks. Use Value: Low VCE(sat) minimizes crossover distortion and heat generation at quiescent bias points. | Use Scenario: Unidirectional H-bridge half-bridge leg controlling brushed DC motors up to 24 V / 1 A. IC Role / Device Role / Timing Role: High-side or low-side switching element controlled by PWM microcontroller GPIO. Use Value: 80 V VCEO headroom accommodates back-EMF spikes during motor commutation without snubber networks. |
| Relay Driver Circuit | Linear Voltage Regulator Pass Element |
Use Scenario: Driving 12 V / 500 mA electromagnetic relays in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Saturated switch interfacing microcontroller logic to inductive relay coil. Use Value: Confirmed VCE(sat) ≤ 0.5 V ensures >95% coil voltage delivery and reduces base drive power loss. | Use Scenario: Series pass transistor in adjustable linear regulators supplying 3.3–12 V at up to 1 A. IC Role / Device Role / Timing Role: Continuously biased active element dissipating excess input-output differential voltage. Use Value: 12.5 W PC rating supports 5 V dropout at 1 A with moderate heatsinking in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BD13910STU | Same package and pinout; hFE range 100–250 at IC = 150 mA (higher gain, tighter spread). | Better suited for low-base-drive applications; may require reduced base resistor value vs. BD1396STU. | Select when higher and more consistent hFE is required for stable bias in temperature-varying environments. |
| MJE13003 | TO-126 package, 700 V VCEO, 1.5 A IC, but lower hFE (min 10 at IC = 500 mA) and higher VCE(sat) (1.5 V). | Designed for high-voltage flyback switchers; unsuitable for linear audio due to poor gain linearity. | Choose only for high-voltage switching where BD1396STU's 80 V rating is insufficient; expect higher base drive and thermal overhead. |
Compared with BD13910STU, BD1396STU offers lower hFE for improved thermal stability in Class AB amplifiers; compared with MJE13003, it delivers superior small-signal gain and lower saturation loss in medium-voltage linear and switching roles.
Availability
BD1396STU is available at Aetrix Electronics and suitable for audio power amplifiers, relay drivers, DC motor controllers, and linear voltage regulators requiring stable component supply across production lifecycles.
Supply support for BD1396STU 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 company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016.
The BD1396STU belongs to Fairchild's legacy BD-series medium-power NPN transistors, engineered for cost-effective, thermally robust linear and switching functions in industrial and consumer equipment.
FAQ
What is the maximum continuous collector current rating for BD1396STU?
The BD1396STU has a maximum continuous collector current (IC) rating of 1.5 A at case temperature TC = 25°C. This rating assumes proper heatsinking; derating is required above 25°C per the published power derating curve, dropping to zero at TC = 150°C. Pulse current capability reaches 3.0 A for short durations.
Does BD1396STU have a built-in base-emitter resistor or protection diode?
No, the BD1396STU is a bare-die NPN bipolar transistor with no integrated resistors, diodes, or protection circuitry. External base current limiting and flyback diodes must be added in inductive load applications. Its pinout is strictly Emitter-Collector-Base on leads 1–2–3 respectively.
What is the hFE classification "6" for BD1396STU, and how does it affect circuit design?
The "6" in BD1396STU denotes its hFE classification group: guaranteed DC current gain between 63 and 160 at VCE = 2 V and IC = 150 mA. This range informs base resistor selection and bias network stability-designers should verify worst-case hFE (63) for minimum drive and typical (100+) for thermal drift analysis in the BD1396STU application.
Can BD1396STU be used as a direct replacement for BD13916STU?
No-BD1396STU and BD13916STU share the same package and voltage/current ratings but differ in hFE classification: BD1396STU is "6" (63–160), while BD13916STU is "16" (100–250). Substituting BD1396STU into a circuit designed for BD13916STU may cause insufficient base drive or unstable bias; verification of hFE-dependent operating points is required before interchange.
Is BD1396STU RoHS compliant and lead-free?
Yes, BD1396STU conforms to RoHS Directive 2011/65/EU and is lead-free. Its TO-126 package uses matte tin (Sn) lead finish, and the device meets JEDEC J-STD-020 moisture sensitivity level (MSL) 1 for unlimited floor life at ≤30°C/85% RH. Full compliance documentation is available upon request for BD1396STU.
BD1396STU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-225AA, TO-126-3
- Packaging:
- Bulk
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 1.5 A
- Voltage - Collector Emitter Breakdown (Max):
- 80 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 50mA, 500mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 40 @ 150mA, 2V
- Power - Max:
- 1.25 W
- Frequency - Transition:
- -
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-126-3
BD1396STU FAQ
1.How can I place an order for BD1396STU through Aetrix?
Please submit a Request for Quotation (RFQ) for BD1396STU 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 BD1396STU reliable?
The price and inventory of BD1396STU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BD1396STU is usually 5 days.
3.What payment methods are accepted for BD1396STU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BD1396STU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BD1396STU?
BD1396STU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BD1396STU 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 BD1396STU?
For technical support, including BD1396STU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BD1396STU requirements.
6.How does Aetrix verify that BD1396STU is sourced from the original manufacturer or authorized distributors?
All BD1396STU 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 BD1396STU meets industry standards.
7.What is the process for return or replacement of BD1396STU?
All BD1396STU units undergo pre-shipment inspection (PSI). If there is an issue with BD1396STU, 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 BD1396STU part is unused and in its original packaging.
Return procedure for BD1396STU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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