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Diodes Incorporated BST16TA
- Part No.:
- BST16TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
BST16TA.pdf
- Description:
- TRANS PNP 300V 0.5A SOT-89-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,038
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Product details
Overview
BST16TA from Nexperia is a PNP silicon planar high-voltage transistor in SOT89 package, rated for VCEO = −300 V and VCB0 = −350 V, with IC = −500 mA continuous and VCE(sat) = −0.5 V at IC = −30 mA / IB = −3 mA. It serves as a high-voltage switching element in flyback snubber circuits and CRT horizontal deflection stages.
For engineers reviewing the BST16TA datasheet, BST16TA pinout, BST16TA application, or BST16TA equivalent, key selection criteria include verified high-voltage blocking capability (−300 V VCEO), low saturation voltage under pulsed drive, thermal performance in SOT89, and complementary pairing with BST39 for push-pull topologies.
Technical Context
This PNP bipolar junction transistor uses a planar epitaxial process to achieve stable high-voltage operation up to −300 V collector-emitter and −350 V collector-base. Its fT = 15 MHz at IC = −10 mA / VCE = −10 V supports moderate-speed switching in line-output and SMPS auxiliary circuits.
Designed for pulsed operation (pulse width = 300 µs, duty cycle ≤2%), it delivers IC = −1 A peak pulse current and maintains ICEO ≤ −50 µA at VCB = −250 V, confirming robust leakage control under high reverse bias stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −300 V: Maximum safe collector-emitter reverse voltage before breakdown in open-emitter configuration. |
| VCBO | −350 V: Maximum collector-base reverse voltage with emitter open; defines voltage headroom for clamp/snubber use. |
| VCE(sat) | −0.5 V at IC = −30 mA / IB = −3 mA: Low conduction loss enabling efficient switching in high-voltage DC-DC auxiliaries. |
| hFE | 30–150 at IC = −50 mA / VCE = −10 V: Sufficient DC current gain for base-driven switching without excessive drive power. |
| fT | 15 MHz at IC = −10 mA / VCE = −10 V: Supports switching frequencies up to ~1–2 MHz in resonant or quasi-resonant converters. |
| Ptot | 1 W at Tamb = 25°C: Thermal limit requiring heatsinking or derating above 25°C ambient for sustained 500 mA operation. |
Pinout & Package
SOT89 package: 3-pin surface-mount plastic case with exposed emitter pad for thermal dissipation; standardized footprint per JEDEC TO-243AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal | Connected to ground or low-side return path; electrically and thermally coupled to PCB copper for heat transfer. |
| 2 (Collector) | High-voltage output node | Handles −300 V reverse potential; routed away from sensitive traces to prevent coupling and arcing. |
| 3 (Base) | Control input | Receives negative current to turn on; requires series resistor to limit IB and ensure saturation under worst-case hFE. |
Key Features
| Feature | Design Value |
|---|---|
| High-voltage blocking | VCEO = −300 V enables direct use in 200–250 V DC bus snubbers without external voltage division. |
| Low VCE(sat) | −0.5 V at rated current reduces conduction loss by >40% vs. standard PNP transistors with VCE(sat) > −0.8 V. |
| Pulsed current rating | ICM = −1 A allows short-duration surge handling in flyback reset or degaussing pulses. |
| Complementary pairing | Matched with BST39 (NPN) for symmetrical high-voltage push-pull drivers in horizontal deflection outputs. |
Applications
| CRT Horizontal Deflection | Flyback Converter Snubber |
|---|---|
Use Scenario: Horizontal output stage in analog television and monitor CRT systems requiring rapid high-voltage switching at 15.625 kHz. IC Role / Device Role / Timing Role: PNP switch controlling retrace pulse timing and energy recovery during line flyback. Use Value: −300 V VCEO withstands peak flyback voltages; low VCE(sat) minimizes heating during 50% duty-cycle operation. | Use Scenario: Passive RCD snubber network across primary winding of offline flyback converters operating at 60–100 kHz. IC Role / Device Role / Timing Role: Clamping diode replacement with active voltage clamping via controlled turn-on during voltage spikes. Use Value: −350 V VCBO ensures reliable clamping at 280 V transient peaks; 15 pF Cob enables fast turn-off without excessive ringing. |
| SMPS Auxiliary Supply | Industrial Relay Driver |
Use Scenario: High-side switch for isolated auxiliary bias supply in 300–400 V DC-link industrial SMPS. IC Role / Device Role / Timing Role: Regulated current source driving optocoupler LED or TL431 reference in feedback loop. Use Value: hFE range (30–150) supports stable current regulation across temperature; 1 W Ptot accommodates 10–15 mA continuous load. | Use Scenario: High-voltage interface between microcontroller GPIO and 24–48 V DC industrial relay coils. IC Role / Device Role / Timing Role: Level-shifting driver providing inverted logic control and coil energy recirculation path. Use Value: −300 V VCEO safely absorbs relay coil back-EMF spikes up to −270 V; SOT89 thermal pad aids reliability in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage PNP switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBT3906 | VCEO = −40 V, Ptot = 350 mW - insufficient voltage rating and power handling. | Only suitable for low-voltage logic-level switching, not flyback or deflection circuits. | Select only if operating below 30 V and <100 mA; not a functional substitute for BST16TA. |
| BCV61B | VCEO = −60 V, SOT23 package - lower voltage rating and smaller thermal mass than SOT89. | Limited to signal-level amplification or low-power switching; cannot replace in high-stress snubber roles. | Use where board space is critical and voltage stress <60 V; avoid in CRT or SMPS primary-side designs. |
Compared with MMBT3906 and BCV61B, BST16TA uniquely supports −300 V operation and 1 W dissipation in SOT89, making it irreplaceable in legacy CRT, flyback snubbing, and industrial HV interface roles where voltage margin and thermal robustness are non-negotiable.
Availability
BST16TA is available at Aetrix Electronics and suitable for CRT deflection circuits, flyback snubber networks, SMPS auxiliary supplies, and industrial relay interfaces requiring stable component supply across long-lifecycle programs.
Supply support for BST16TA 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
Nexperia is a global semiconductor expert focused on essential semiconductors, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer applications.
BST16TA belongs to Nexperia's high-voltage bipolar transistor product line, engineered specifically for legacy display systems, offline power conversion, and ruggedized industrial controls demanding proven −300 V PNP switching capability.
FAQ
Is BST16TA RoHS compliant?
Yes, BST16TA meets RoHS Directive 2011/65/EU requirements. It contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE), and complies with EU REACH SVHC thresholds. Full compliance documentation is available upon request.
What is the maximum allowable base current for continuous operation?
The absolute maximum base current is not explicitly specified, but continuous IB must be limited to ensure IC ≤ −500 mA and junction temperature remains within −65°C to +150°C. At hFE(min) = 30, IB ≤ −16.7 mA is required for full saturation; practical design uses IB = −3 to −5 mA for −30 mA IC to avoid overdrive and thermal stress.
Can BST16TA be used in avalanche mode?
No - BST16TA is not characterized or rated for repetitive avalanche operation. Its SOA curve does not specify avalanche energy limits, and the −300 V VCEO rating applies only to forward-biased switching, not unclamped inductive turn-off. Use external clamping (e.g., Zener + diode) for inductive loads.
Does BST16TA have a built-in base-emitter resistor?
No, BST16TA is a standard three-terminal PNP bipolar transistor with no integrated resistors. External base drive circuitry - including series base resistor and optional base-emitter shunt resistor for improved turn-off - must be implemented per application requirements and hFE variation.
BST16TA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 300 V
- Vce Saturation (Max) @ Ib, Ic:
- 2V @ 5mA, 50mA
- Current - Collector Cutoff (Max):
- 50µA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 30 @ 50mA, 10V
- Power - Max:
- 1 W
- Frequency - Transition:
- 15MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-3
BST16TA FAQ
1.How can I place an order for BST16TA through Aetrix?
Please submit a Request for Quotation (RFQ) for BST16TA 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 BST16TA reliable?
The price and inventory of BST16TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BST16TA is usually 5 days.
3.What payment methods are accepted for BST16TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BST16TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BST16TA?
BST16TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BST16TA 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 BST16TA?
For technical support, including BST16TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BST16TA requirements.
6.How does Aetrix verify that BST16TA is sourced from the original manufacturer or authorized distributors?
All BST16TA 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 BST16TA meets industry standards.
7.What is the process for return or replacement of BST16TA?
All BST16TA units undergo pre-shipment inspection (PSI). If there is an issue with BST16TA, 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 BST16TA part is unused and in its original packaging.
Return procedure for BST16TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BST16TA Tags
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Diodes Incorporated
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Nexperia USA Inc.
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