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onsemi BD17810STU
- Part No.:
- BD17810STU
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-225AA, TO-126-3
- Datasheet:
-
BD17810STU.pdf
- Description:
- TRANS PNP 60V 3A TO-126-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,758
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Product details
Overview
BD17810STU from ON Semiconductor is a PNP epitaxial silicon power transistor in TO-126 package, rated for -60 V VCEO, -3 A continuous collector current, 30 W power dissipation at TC = 25°C, and DC current gain (hFE) of 63–160 at IC = -150 mA. It serves as a medium-power linear amplifier or switching device in industrial power supplies and motor control circuits.
For engineers reviewing the BD17810STU datasheet, pinout, applications, or equivalent options, key selection criteria include its -60 V collector-emitter sustaining voltage, -0.8 V saturation voltage at IC = -1 A / IB = -0.1 A, junction-to-case thermal resistance of 8.5°C/W, and compatibility with complementary NPN BD177 devices in push-pull configurations.
Technical Context
The BD17810STU operates as a single PNP bipolar junction transistor with fixed emitter-base and collector-base junction structures optimized for linear and switching operation up to 3 MHz bandwidth. Its safe operating area (SOA) supports pulsed collector currents up to -7 A with 300 µs pulse width and 1.5% duty cycle.
Designed for discrete power stage implementation, it requires external base drive circuitry and heat sinking due to its 8.5°C/W RθJC. The device exhibits VBE(on) = -1.3 V at IC = -1 A and maintains hFE ≥ 15 at IC = -1 A, enabling predictable current amplification in Class AB amplifier stages and relay drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -60 V - Maximum allowable collector-emitter voltage before breakdown in common-emitter configuration |
| IC (DC) | -3 A - Continuous collector current rating defining steady-state power handling capability |
| PC @ TC=25°C | 30 W - Maximum power dissipation at case temperature of 25°C, requiring thermal management above ambient |
| hFE | 63–160 - DC current gain range at VCE = -2 V, IC = -150 mA, determining base drive requirements |
| VCE(sat) | -0.8 V - Collector-emitter voltage drop at IC = -1 A and IB = -0.1 A, directly impacting conduction loss |
| fT | 3 MHz - Current gain bandwidth product limiting small-signal amplification frequency range |
Pinout & Package
BD17810STU is housed in a TO-126 plastic package with 3 leads: Emitter (Lead 1), Collector (Lead 2), Base (Lead 3). The package features a metal tab for mechanical mounting and thermal conduction to heatsinks.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current exit path for PNP transistor | Connected to most positive rail in common-emitter switch; requires low-impedance return path |
| 2 (Collector) | Current entry path for PNP transistor | Typically tied to load and negative supply; electrically isolated from tab in TO-126 |
| 3 (Base) | Control terminal for minority carrier injection | Driven with negative current relative to emitter to turn on; requires current-limiting resistor |
Key Features
| Feature | Design Value |
|---|---|
| Complementary pairing | Explicitly designed as PNP counterpart to BD177 NPN, enabling matched push-pull output stages |
| High VCEO(sus) | -60 V sustaining voltage ensures reliable operation under inductive load switching transients |
| Low VCE(sat) | -0.8 V at rated current reduces conduction losses in linear regulators and motor drivers |
| Thermal performance | RθJC = 8.5°C/W enables effective heatsink coupling for sustained 3 A operation with proper mounting |
Applications
| Industrial Power Supply Regulation | DC Motor Direction Control |
|---|---|
Use Scenario: Regulating unregulated DC bus in 24 V industrial SMPS feedback loops using emitter-follower configuration. IC Role / Device Role / Timing Role: PNP pass transistor controlling output voltage via base bias from error amplifier. Use Value: -60 V VCEO accommodates 48 V input surges; -0.8 V VCE(sat) minimizes dropout and thermal stress. | Use Scenario: Driving one side of an H-bridge for bidirectional 12 V brushed DC motor control. IC Role / Device Role / Timing Role: High-side PNP switch enabling forward/reverse polarity reversal when paired with NPN low-side switches. Use Value: Matched hFE and SOA with BD177 allows symmetrical drive timing and current sharing in bridge legs. |
| Relay Driver Circuit | Linear Audio Output Stage |
Use Scenario: Switching 24 V/500 mA industrial relays with flyback protection. IC Role / Device Role / Timing Role: Saturated PNP switch interfacing microcontroller GPIO to relay coil. Use Value: -3 A IC rating provides 6× safety margin over relay coil current; TO-126 tab simplifies PCB heatsinking. | Use Scenario: Complementary Class AB output stage in low-frequency (<10 kHz) audio amplifiers. IC Role / Device Role / Timing Role: PNP emitter follower delivering current to speaker load while tracking NPN BD177 signal. Use Value: hFE ≥ 63 at IC = -150 mA ensures stable bias point; fT = 3 MHz exceeds audio band requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD178G | TO-252 (DPAK) package, RθJC = 3°C/W, VCEO = -60 V, IC = -3 A, same hFE range | Surface-mount layout; higher thermal efficiency but requires rework for through-hole designs | Select when automated assembly and improved thermal performance outweigh PCB redesign cost |
| BD178 | Same die, identical specs, TO-126 package - BD17810STU is Fairchild/ON Semiconductor's standardized ordering variant of BD178 | No functional difference; BD17810STU reflects post-integration nomenclature update (underscore → dash) | BD17810STU is the current orderable part number; BD178 is legacy designation no longer supported for new orders |
Compared with MJD178G and BD178, BD17810STU offers identical electrical performance in a through-hole TO-126 package optimized for manual prototyping and legacy industrial PCBs, while ensuring long-term supply continuity under ON Semiconductor's updated part numbering system.
Availability
BD17810STU is available at Aetrix Electronics and suitable for industrial power supplies, motor control systems, and relay interface modules requiring stable component supply and long-lifecycle support.
Supply support for BD17810STU 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 power management, analog, sensor, and logic solutions for automotive, industrial, and cloud power applications.
BD17810STU belongs to ON Semiconductor's discrete bipolar transistor product line, engineered for robust medium-power linear and switching applications in harsh industrial environments.
FAQ
What is the maximum continuous collector current rating for BD17810STU?
The BD17810STU has a maximum continuous collector current (IC) rating of -3 A at case temperature TC = 25°C. Derating is required above this temperature per the power derating curve in the datasheet, with RθJC = 8.5°C/W defining the thermal slope. This rating applies under proper heatsinking conditions and must be validated against actual board-level thermal performance in the target application.
Does BD17810STU have a documented pin-to-pin replacement?
BD17810STU is functionally and physically identical to BD178, differing only in nomenclature due to ON Semiconductor's post-Fairchild integration naming convention (underscore replaced with dash). No other manufacturer offers a verified pin-to-pin replacement; MJD178G shares electrical specs but uses TO-252 packaging and requires PCB layout changes.
What is the typical VCE(sat) value for BD17810STU under standard test conditions?
The BD17810STU exhibits a typical collector-emitter saturation voltage (VCE(sat)) of -0.8 V when tested at IC = -1 A and IB = -0.1 A. This value is specified in the Absolute Maximum Ratings table and confirmed in the Electrical Characteristics section of the official ON Semiconductor datasheet for BD17810STU.
Can BD17810STU be used in complementary pair configurations with NPN transistors?
Yes, BD17810STU is explicitly designed as the PNP complement to the NPN BD177 transistor. Both share matched voltage ratings, gain ranges, and thermal characteristics, enabling balanced push-pull amplifier stages and H-bridge motor drivers without gain skew or thermal mismatch.
What package type does BD17810STU use, and how is the tab electrically isolated?
BD17810STU uses the TO-126 plastic package with three leads and an exposed metal tab. In this package, the collector (Lead 2) is internally connected to the tab, making the tab electrically active at collector potential. Designers must ensure the tab is either insulated from the heatsink or referenced to the collector node to prevent short circuits.
BD17810STU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-225AA, TO-126-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 3 A
- Voltage - Collector Emitter Breakdown (Max):
- 60 V
- Vce Saturation (Max) @ Ib, Ic:
- 800mV @ 100mA, 1A
- Current - Collector Cutoff (Max):
- 100µA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 63 @ 150mA, 2V
- Power - Max:
- 30 W
- Frequency - Transition:
- 3MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-126-3
BD17810STU FAQ
1.How can I place an order for BD17810STU through Aetrix?
Please submit a Request for Quotation (RFQ) for BD17810STU 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 BD17810STU reliable?
The price and inventory of BD17810STU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BD17810STU is usually 5 days.
3.What payment methods are accepted for BD17810STU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BD17810STU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BD17810STU?
BD17810STU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BD17810STU 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 BD17810STU?
For technical support, including BD17810STU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BD17810STU requirements.
6.How does Aetrix verify that BD17810STU is sourced from the original manufacturer or authorized distributors?
All BD17810STU 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 BD17810STU meets industry standards.
7.What is the process for return or replacement of BD17810STU?
All BD17810STU units undergo pre-shipment inspection (PSI). If there is an issue with BD17810STU, 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 BD17810STU part is unused and in its original packaging.
Return procedure for BD17810STU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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