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Diodes Incorporated BCW68HTA
- Part No.:
- BCW68HTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BCW68HTA.pdf
- Description:
- TRANS PNP 45V 0.8A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:169,972
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Product details
Overview
BCW68HTA from Diodes Incorporated is a 45V PNP medium-power bipolar junction transistor in SOT23 package, rated for -800mA continuous collector current and featuring VCE(sat) < -300mV at -100mA/-10mA drive, hFE = 180–630 (depending on bias), and fT = 100MHz - used in automotive load switching, industrial power control, and DC-DC converter bias circuits.
For engineers reviewing the BCW68HTA datasheet, BCW68HTA pinout, BCW68HTA application, or BCW68HTA equivalent, key selection criteria include guaranteed VCEO ≥ -45V, low saturation voltage under high-current switching, thermal resistance of 357°C/W on 15mm × 15mm PCB, and AEC-Q101 readiness for automotive-grade designs.
Technical Context
This PNP transistor operates with base-emitter forward bias to control high-side current paths in linear and saturated switching modes. Its BVCEO = -45V and IC = -800mA rating support robust operation in 24V industrial rails and 12V automotive systems.
Electrical behavior is characterized by hFE variation across operating points (180 @ -10mA, 350 @ -100mA, 630 @ -500mA), VBE(sat) = -2V at -500mA/-50mA, and fT = 100MHz - enabling use in both DC bias networks and moderate-frequency signal amplification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -45V - supports reliable blocking in 24V supply rail applications with margin |
| IC (cont.) | -800mA - enables direct drive of medium-power loads like relays and LED strings |
| VCE(sat) | < -300mV @ -100mA/-10mA - minimizes conduction loss and self-heating in switching mode |
| hFE | 180–630 - wide gain range allows flexible bias design across current levels |
| fT | 100MHz - permits use in low-noise preamplifier stages and fast-switching control loops |
| RθJA | 357°C/W - defines thermal derating on standard 15mm × 15mm FR4 PCB layout |
| ESD HBM | 4000V - meets JEDEC Class 3A for handling robustness in assembly environments |
Pinout & Package
Package: SOT23 - surface-mount plastic package with matte tin-plated leads, moisture sensitivity level 1, weight ≈ 0.008g, UL 94V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal | Connected to higher-potential rail in high-side switch configuration |
| 2 (Base) | Control input | Receives negative drive current to turn on PNP conduction path |
| 3 (Collector) | Current source terminal | Connected to load and ground; carries full switched current when active |
Key Features
| Feature | Design Value |
|---|---|
| High breakdown voltage | VCEO = -45V ensures safe operation in 24V industrial and 12V automotive systems |
| Low saturation voltage | VCE(sat) < -300mV at -100mA reduces power loss and thermal stress during switching |
| Wide DC current gain range | hFE = 180–630 supports stable biasing across varying load currents |
| AEC-Q101 readiness | Manufactured in IATF 16949-certified facilities; PPAP-capable for automotive qualification |
| Green packaging | Halogen- and antimony-free, RoHS 3 compliant (Br+Cl < 1500ppm, Sb < 1000ppm) |
Applications
| Automotive Lighting Control | Industrial Relay Driver |
|---|---|
Use Scenario: Switching 12V LED headlamp modules in body control units. IC Role / Device Role / Timing Role: High-side PNP switch controlling current flow from battery to LED anode. Use Value: VCEO = -45V provides 3× overvoltage margin against load-dump transients; low VCE(sat) limits thermal rise at 500mA typical load. | Use Scenario: Driving 24V coil relays in PLC output modules. IC Role / Device Role / Timing Role: Medium-power interface transistor translating logic-level signals to relay coil current. Use Value: IC = -800mA exceeds typical 24V relay hold current (≈400mA); hFE ≥ 350 ensures sufficient drive with minimal base current. |
| DC-DC Converter Bias Circuit | Linear Voltage Regulator Pass Element |
Use Scenario: Providing base current to main power transistor in buck converter feedback loop. IC Role / Device Role / Timing Role: Current amplifier stage delivering precise base drive under dynamic load conditions. Use Value: fT = 100MHz supports stable closed-loop response up to ~10MHz; low noise figure (2–10dB) preserves regulation accuracy. | Use Scenario: Acting as pass transistor in adjustable linear regulators for sensor power supplies. IC Role / Device Role / Timing Role: Series-pass element regulating output voltage via emitter-follower configuration. Use Value: VCE(sat) < -300mV minimizes dropout voltage; RθJA = 357°C/W enables 310mW dissipation on compact PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP medium-power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BCW68GTA | Same die, lower hFE bin (100–250 vs. 180–630); identical VCEO, IC, VCE(sat) | Suitable where gain consistency is less critical than cost; not recommended for precision bias circuits | Select when gain spread tolerance > ±30% is acceptable and cost optimization is prioritized |
| MMBT68 | Same SOT23 package but VCEO = -30V, IC = -600mA, VCE(sat) = -400mV @ -100mA | Limited to 12V systems only; higher saturation loss reduces efficiency in high-current operation | Choose only for legacy designs with ≤30V rails and <600mA loads; verify thermal margin due to higher VCE(sat) |
Compared with BCW68GTA and MMBT68, BCW68HTA delivers superior gain range and higher voltage/current capability - making it optimal for new 24V industrial and AEC-Q101-aligned automotive designs requiring margin and stability.
Availability
BCW68HTA is available at Aetrix Electronics and suitable for automotive lighting control, industrial relay drivers, and DC-DC converter bias circuits requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for BCW68HTA 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The BCW68HTA belongs to Diodes' general-purpose bipolar transistor product line, engineered for high-reliability switching and amplification in automotive, industrial, and consumer power management systems.
FAQ
What is the maximum allowable junction temperature for BCW68HTA?
The BCW68HTA has an operating junction temperature range of -55°C to +150°C. Its absolute maximum TJ is +150°C; sustained operation above this limit risks permanent degradation. Derating begins at +25°C ambient, with power dissipation reduced linearly to zero at +150°C per the published derating curve.
Is BCW68HTA qualified to AEC-Q101?
BCW68HTA is manufactured in IATF 16949-certified facilities and supports PPAP documentation. While not pre-qualified as a standard AEC-Q101 part, Diodes Incorporated confirms it meets AEC-Q101 test requirements upon customer request - including HTGB, ELFR, and temperature cycling - for automotive applications requiring specific change control.
How does BCW68HTA's hFE vary with collector current?
hFE is specified as 180–250 at IC = -10mA, 250–350 at IC = -100mA, and 350–630 at IC = -500mA (all at VCE = -1V or -2V). This increasing trend reflects improved carrier injection efficiency at higher currents, enabling predictable bias design across load ranges without external compensation.
Can BCW68HTA replace BCW66H in complementary pair designs?
No - BCW68HTA is PNP while BCW66H is its complementary NPN counterpart. They are designed as matched pairs for push-pull or differential amplifier topologies. Substituting one for the other would invert circuit polarity and cause functional failure; correct usage requires both devices together in symmetric configurations.
BCW68HTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 800 mA
- Voltage - Collector Emitter Breakdown (Max):
- 45 V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 10mA, 100mA
- Current - Collector Cutoff (Max):
- 20nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 250 @ 100mA, 1V
- Power - Max:
- 330 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BCW68HTA FAQ
1.How can I place an order for BCW68HTA through Aetrix?
Please submit a Request for Quotation (RFQ) for BCW68HTA 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 BCW68HTA reliable?
The price and inventory of BCW68HTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCW68HTA is usually 5 days.
3.What payment methods are accepted for BCW68HTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCW68HTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCW68HTA?
BCW68HTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCW68HTA 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 BCW68HTA?
For technical support, including BCW68HTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCW68HTA requirements.
6.How does Aetrix verify that BCW68HTA is sourced from the original manufacturer or authorized distributors?
All BCW68HTA 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 BCW68HTA meets industry standards.
7.What is the process for return or replacement of BCW68HTA?
All BCW68HTA units undergo pre-shipment inspection (PSI). If there is an issue with BCW68HTA, 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 BCW68HTA part is unused and in its original packaging.
Return procedure for BCW68HTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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