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Diodes Incorporated APT27HZTR-G1
- Part No.:
- APT27HZTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
APT27HZTR-G1.pdf
- Description:
- TRANS NPN 450V 0.8A TO-92
- Quantity:
- Payment:
- Shipping:
Inventory:6,456
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Product details
Overview
APT27HZTR-G1 from Diodes Incorporated is a 450V NPN high-voltage power transistor in TO92 package, rated for 0.8A continuous collector current, 800V collector-emitter breakdown (BVCES), and 9V emitter-base breakdown (BVEBO), used as main switching device in low-power AC-DC SMPS for LED lighting and mobile battery chargers.
For engineers reviewing the APT27HZTR-G1 datasheet, APT27HZTR-G1 pinout, APT27HZTR-G1 application, or APT27HZTR-G1 equivalent, key selection criteria include high-voltage blocking capability (450V VCEO), safe operating area under pulsed loads, thermal resistance (156.25°C/W), and RoHS-compliant green packaging for consumer power supply designs.
Technical Context
This NPN bipolar junction transistor operates in linear or saturated switching mode with DC current gain (hFE) ranging from 15 to 40 at IC = 100–300mA and VCE = 10V. Its high BVCES (800V) enables robust clamping during inductive turn-off transients in flyback converters.
The device features low VCE(sat) of ≤0.5V at IC = 200mA/IB = 40mA and withstands 8kV HBM ESD, supporting reliable operation in cost-sensitive, non-automotive AC-DC adapters where IATF 16949 qualification is not required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 450V - maximum sustained collector-emitter voltage before avalanche conduction in standard switching operation |
| BVCES | 800V - collector-emitter breakdown with base shorted, defining safe clamp voltage during transient overvoltage events |
| IC (cont.) | 0.8A - continuous DC collector current rating at TA = 25°C, derated above 25°C per 5.1mW/°C |
| VCE(sat) | ≤0.5V @ IC = 200mA, IB = 40mA - ensures low conduction loss and minimal self-heating in saturated switch applications |
| RθJA | 156.25°C/W - thermal resistance from junction to ambient, requiring PCB copper area or heatsinking for >0.3W dissipation |
| hFE | 15–40 @ IC = 100–300mA - sufficient DC gain for direct base drive without external amplification in low-frequency SMPS |
| ESD HBM | 8,000V - qualifies for handling in standard ESD-safe assembly environments without special precautions |
Pinout & Package
APT27HZTR-G1 is housed in a TO92 (Joggled Legs) molded plastic package with matte tin-plated terminals, UL 94V-0 flammability rating, and approximate weight of 200mg. Pin configuration follows standard TO92 Type C outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| E (Emitter) | Current sink terminal | Connected to ground or low-side return path; must handle full load current and provide stable reference for base drive |
| C (Collector) | High-voltage switching node | Interfaces directly with primary winding of flyback transformer or drain of MOSFET in hybrid topologies; requires ≥4mm creepage clearance at 450V |
| B (Base) | Control input | Receives current-limited drive signal; typical 40mA base current needed for full saturation at 200mA collector load |
Key Features
| Feature | Design Value |
|---|---|
| High-voltage blocking | 450V VCEO and 800V BVCES enable use in universal-input (85–265VAC) flyback converters without snubber redesign |
| Green packaging | Halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb) meets global environmental compliance mandates |
| TO92 mechanical compatibility | Joggled-leg TO92 footprint allows drop-in replacement of legacy 2N5551/2N2222-class devices in existing adapter PCB layouts |
| Thermal performance | 156.25°C/W RθJA supports up to 0.8W dissipation with minimal copper pour, reducing heatsink cost in sub-10W designs |
Applications
| LED Lighting Power Supply | Mobile Phone Charger |
|---|---|
Use Scenario: Constant-voltage flyback converter powering 12V LED strips in residential/commercial retrofit lamps. IC Role / Device Role / Timing Role: Main switching transistor controlling primary-side energy transfer; driven by UC3842-type PWM controller at 65kHz. Use Value: 450V VCEO safely handles reflected output voltage plus leakage spike margin, eliminating need for higher-cost 600V+ transistors. | Use Scenario: Compact wall-wart adapter delivering 5V/1A to smartphones via quasi-resonant flyback topology. IC Role / Device Role / Timing Role: Primary-side switch modulating transformer energy storage; base driven by discrete transistor stage from controller IC. Use Value: 0.5V VCE(sat) minimizes conduction loss at 200mA peak current, improving efficiency by ~1.2% versus older 2N5551-based designs. |
| DVD/STB Power Supply | Low-Power IoT Adapter |
Use Scenario: Dual-output (5V/12V) SMPS inside set-top box providing standby and main rail power. IC Role / Device Role / Timing Role: High-side switch in auxiliary winding feedback circuit; operates in linear region for precise voltage regulation. Use Value: 9V VEBO rating permits stable biasing from 5V auxiliary winding without Zener clamping, simplifying feedback network. | Use Scenario: Ultra-low-cost AC-DC module powering Wi-Fi-enabled smart sensors with <300mW no-load consumption. IC Role / Device Role / Timing Role: Low-duty-cycle switching element in discontinuous conduction mode (DCM) flyback, cycling only during load pulses. Use Value: 8kV HBM ESD tolerance eliminates need for external protection diodes on base line, reducing BOM count and board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage NPN transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD27T4G | TO252 package, 450V VCEO, 1.5A IC, higher PD (1.5W), RθJA = 62.5°C/W | Requires PCB pad redesign and thermal vias; suited for higher-power adapters (>15W) | Select when >0.8A continuous current or lower thermal resistance is required; not pin-compatible |
| 2SC4110S-TL-E | TO92, 500V VCEO, 0.5A IC, hFE = 120–270, higher gain but lower current rating | Better for low-current linear regulators or signal amplification; insufficient for 0.8A SMPS switching | Choose only for low-power (<0.4A), high-gain bias circuits-not as direct SMPS switch replacement |
Compared with MJD27T4G and 2SC4110S-TL-E, APT27HZTR-G1 uniquely balances TO92 mountability, 0.8A current capability, and 450V blocking in a green, RoHS-compliant package-making it optimal for cost-driven, sub-10W AC-DC designs where thermal budget and layout continuity are critical.
Availability
APT27HZTR-G1 is available at Aetrix Electronics and suitable for LED lighting power supplies, mobile phone chargers, and DVD/STB power supplies requiring stable component supply despite its obsolete status through controlled legacy inventory channels.
Supply support for APT27HZTR-G1 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 the Americas.
APT27HZTR-G1 belongs to Diodes' high-voltage bipolar transistor product line, engineered specifically for cost-sensitive, low-to-mid power AC-DC conversion in consumer electronics where reliability, regulatory compliance, and TO92 footprint compatibility are prioritized.
FAQ
Is APT27HZTR-G1 still in active production?
No, APT27HZTR-G1 is officially obsolete per Diodes' datasheet DS36303 Rev. 3–4. However, Aetrix Electronics maintains limited legacy stock with full traceability and offers lifecycle support including last-time buy planning and cross-reference assistance for qualified replacements.
What is the maximum operating temperature for APT27HZTR-G1?
The APT27HZTR-G1 has an operating junction temperature range of –55°C to +150°C. Derating begins at +25°C ambient: power dissipation must be reduced by 5.1mW/°C above this point, limiting usable case temperature to approximately +105°C at full 0.8W rating.
Can APT27HZTR-G1 replace 2N5551 in existing designs?
Yes, APT27HZTR-G1 shares TO92 packaging and pinout (E-C-B flat-face view), but offers significantly higher VCEO (450V vs. 160V) and BVCES (800V vs. 180V). It is electrically compatible for upgrade paths in flyback adapters where voltage stress exceeds original design margins.
Does APT27HZTR-G1 require a heatsink in typical SMPS use?
Not typically: at 0.8A IC and 0.5V VCE(sat), power dissipation is ~0.4W. With RθJA = 156.25°C/W, junction rise is ~62.5°C above ambient-within safe limits for TO92 on 1-inch² 1oz copper. Heatsinking is only needed if ambient exceeds +65°C or duty cycle approaches 100%.
APT27HZTR-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 800 mA
- Voltage - Collector Emitter Breakdown (Max):
- 450 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 40mA, 200mA
- Current - Collector Cutoff (Max):
- 10µA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 6 @ 300mA, 10V
- Power - Max:
- 800 mW
- Frequency - Transition:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92
APT27HZTR-G1 FAQ
1.How can I place an order for APT27HZTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for APT27HZTR-G1 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 APT27HZTR-G1 reliable?
The price and inventory of APT27HZTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APT27HZTR-G1 is usually 5 days.
3.What payment methods are accepted for APT27HZTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APT27HZTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APT27HZTR-G1?
APT27HZTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APT27HZTR-G1 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 APT27HZTR-G1?
For technical support, including APT27HZTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APT27HZTR-G1 requirements.
6.How does Aetrix verify that APT27HZTR-G1 is sourced from the original manufacturer or authorized distributors?
All APT27HZTR-G1 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 APT27HZTR-G1 meets industry standards.
7.What is the process for return or replacement of APT27HZTR-G1?
All APT27HZTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with APT27HZTR-G1, 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 APT27HZTR-G1 part is unused and in its original packaging.
Return procedure for APT27HZTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APT27HZTR-G1 Tags
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Diodes Incorporated
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