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STMicroelectronics ST1802FH
- Part No.:
- ST1802FH
- Manufacturer:
- STMicroelectronics
- Category:
- Single Bipolar Transistors
- Package:
- TO-220-3 Full Pack, Isolated Tab
- Datasheet:
-
ST1802FH.pdf
- Description:
- TRANS NPN 600V 10A TO-220FH
- Quantity:
- Payment:
- Shipping:
Inventory:4,491
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Product details
Overview
ST1802FH from STMicroelectronics is a high-voltage fast-switching NPN power transistor in TO-220FH package, rated for 1500 V VCBO and 600 V VCEO, with 10 A continuous collector current and 40 W dissipation at Tc = 25 °C. It features tight hFE control (4–9 at IC = 5 A), low VCE(sat) of 1.5 V (IC = 4 A, IB = 1.2 A), and 2.6 µs storage time under inductive switching at 16 kHz - optimized for horizontal deflection in color TVs up to 21 inches.
For engineers reviewing the ST1802FH datasheet, ST1802FH pinout, ST1802FH application, or ST1802FH equivalent, key selection criteria include its 1500 V collector-base standoff, U.L.-compliant fully molded insulated package with >4 mm creepage, 2500 V RMS insulation withstand voltage, and validated inductive switching performance per Figure 1 test circuit.
Technical Context
This transistor employs diffused collector technology to stabilize operation against base drive variations, minimizing worst-case power dissipation in line-output stages. Its ruggedized construction supports repetitive inductive turn-off with LB = 25 mH and VBB(off) = –2.5 V, meeting strict SOA requirements for TV horizontal deflection.
The device operates with guaranteed VCEO(sus) ≥ 600 V at IC = 100 mA under inductive load, and exhibits controlled switching dynamics: ts = 2.6 µs and tf = 0.2 µs (typ.) at f = 16 kHz, enabling reliable flyback energy recovery without secondary breakdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO | 1500 V - Enables direct connection to high-voltage flyback transformer primary without external snubbing. |
| VCEO | 600 V - Sustains full line-derived B+ voltage in CRT TV horizontal output stage under load transients. |
| IC (cont.) | 10 A - Supports peak horizontal scan currents up to 21-inch CRT deflection yoke requirements. |
| VCE(sat) | 1.5 V @ IC = 4 A, IB = 1.2 A - Limits conduction loss to ≤6 W during active scan period, reducing heatsink demand. |
| ts / tf | 2.6 µs / 0.2 µs - Ensures clean turn-off before retrace interval, preventing excessive voltage overshoot in 16 kHz operation. |
| Rthj-case | 3.125 °C/W - Allows thermal design with standard TO-220 heatsinks while maintaining Tj ≤ 150 °C at 40 W Ptot. |
| Viso | 2500 V RMS - Permits direct mounting to grounded heatsink without insulating washer, simplifying mechanical assembly. |
Pinout & Package
Package: TO-220FH - fully molded, insulated plastic case compliant with UL recognition; creepage distance > 4 mm between leads and heatsink mounting surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Collector (C) | Main high-voltage current path | Internally connected to metal tab; electrically isolated from heatsink by molded body - enables direct heatsink mounting without insulator. |
| Base (B) | Control electrode for switching | Receives drive current (up to 4 A peak); tight hFE distribution ensures consistent gain across production lots for stable drive design. |
| Emitter (E) | Current return path | Low-inductance terminal tied to ground reference; supports fast di/dt during retrace without oscillation. |
Key Features
| Feature | Design Value |
|---|---|
| Diffused collector structure | Stabilizes VCEO(sus) and reduces sensitivity to base drive waveform variations in line-output circuits. |
| Tight hFE control (4–9) | Enables predictable base drive sizing across manufacturing lots, eliminating need for trim resistors in production. |
| UL-compliant insulated package | Eliminates mandatory insulating hardware during heatsink mounting, reducing assembly cost and thermal interface resistance. |
| 2500 V RMS insulation rating | Permits safe operation with grounded heatsinks in high-voltage TV chassis, meeting IEC/UL safety clearance standards. |
| Inductive SOA validation | Guaranteed safe operation with LB = 25 mH and VBB(off) = –2.5 V, matching real-world horizontal deflection load conditions. |
Applications
| Horizontal Deflection in CRT TVs | High-Voltage Flyback Generators |
|---|---|
Use Scenario: Driving 21-inch CRT horizontal deflection yoke with 16 kHz sawtooth current waveform and flyback recovery. IC Role / Device Role / Timing Role: Main switch in line-output stage; handles repetitive high-voltage switching and energy recovery during retrace. Use Value: 1500 V VCBO and 600 V VCEO(sus) prevent breakdown during flyback spikes; 2.6 µs ts ensures full turn-off before retrace begins. | Use Scenario: Generating high-voltage pulses for CRT anode supply or photomultiplier tube bias in legacy instrumentation. IC Role / Device Role / Timing Role: Primary-side switch in resonant or quasi-resonant flyback converter operating at fixed 16 kHz. Use Value: 2500 V RMS insulation allows direct heatsink grounding, simplifying HV isolation layout and improving EMI performance. |
| Industrial Ignition Systems | Capacitor Discharge Circuits |
Use Scenario: Triggering spark generation in oil/gas burner ignition modules requiring high dV/dt and repetitive pulse handling. IC Role / Device Role / Timing Role: High-voltage switch discharging stored energy into ignition coil primary winding. Use Value: Ruggedized SOA and 15 A ICM support 5 ms peak current pulses without second breakdown, ensuring long-term reliability. | Use Scenario: Rapid discharge of high-energy capacitors in flash lamp drivers or pulsed laser excitation circuits. IC Role / Device Role / Timing Role: Low-loss, fast-turnoff switch controlling capacitor-to-load energy transfer. Use Value: Low VCE(sat) (1.5 V) and fast tf (0.2 µs) minimize switching losses and enable precise timing control of discharge duration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage NPN switching transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BU508A | Lower VCBO (1500 V same), but higher VCE(sat) (2 V @ IC = 4 A) and slower ts (3.5 µs) | Less suitable for 16 kHz TV deflection due to longer storage time and higher conduction loss | Prefer ST1802FH where tighter hFE control and lower saturation voltage are required for stable drive design. |
| 2SD1762 | Higher VCEO (700 V), but no UL-insulated package and only 1800 V Viso (RMS) | Requires external insulator for heatsink mounting; not certified for direct-mount safety-critical applications | Choose ST1802FH when UL compliance, creepage >4 mm, and simplified mechanical integration are mandatory. |
Compared with BU508A and 2SD1762, the ST1802FH delivers superior combination of high-voltage robustness, fast switching, and certified insulation - making it the preferred choice for safety-compliant, high-reliability horizontal deflection and flyback generator designs.
Availability
ST1802FH is available at Aetrix Electronics and suitable for horizontal deflection circuits, high-voltage flyback generators, and industrial ignition systems requiring stable component supply and long-lifecycle support.
Supply support for ST1802FH 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs and discrete power devices for industrial, automotive, and consumer markets.
The ST1802FH belongs to ST's high-voltage bipolar transistor family engineered specifically for CRT television line-output and flyback power conversion - emphasizing ruggedness, insulation integrity, and repeatable switching behavior under inductive stress.
FAQ
Is ST1802FH pin-compatible with standard TO-220 NPN transistors?
No - ST1802FH uses the TO-220FH variant: the collector is internally connected to the metal tab, but the entire package is fully insulated and UL-recognized. Pin assignment (C-B-E) matches standard TO-220, but mechanical mounting differs due to molded insulation and >4 mm creepage path.
What is the maximum allowable case temperature for continuous operation?
The absolute maximum case temperature is not specified independently, but with Rthj-case = 3.125 °C/W and Tj(max) = 150 °C, sustained operation at 40 W requires Tc ≤ 25 °C. Derating is necessary above 25 °C; at Tc = 100 °C, max power drops to ~12.5 W to maintain Tj ≤ 150 °C.
Can ST1802FH be used in avalanche mode?
No - ST1802FH is not rated or characterized for repetitive avalanche operation. Its SOA is validated under inductive switching with external clamping (VBB(off) = –2.5 V), and VCEO(sus) = 600 V is the guaranteed sustaining voltage - exceeding this risks uncontrolled breakdown.
Does ST1802FH require a base resistor in TV line-output applications?
Yes - a base drive resistor is essential to limit IB within 4 A peak and ensure proper turn-on/turn-off timing. Typical designs use 1–2 Ω series resistance with active base drive circuitry to achieve IBon(END) = 1 A and meet the 2.6 µs storage time spec under 16 kHz operation.
ST1802FH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-220-3 Full Pack, Isolated Tab
- Packaging:
- Tube
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 10 A
- Voltage - Collector Emitter Breakdown (Max):
- 600 V
- Vce Saturation (Max) @ Ib, Ic:
- 5V @ 800mA, 4A
- Current - Collector Cutoff (Max):
- 1mA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 4 @ 5A, 5V
- Power - Max:
- 40 W
- Frequency - Transition:
- -
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220FH
ST1802FH FAQ
1.How can I place an order for ST1802FH through Aetrix?
Please submit a Request for Quotation (RFQ) for ST1802FH 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 ST1802FH reliable?
The price and inventory of ST1802FH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST1802FH is usually 5 days.
3.What payment methods are accepted for ST1802FH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST1802FH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST1802FH?
ST1802FH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST1802FH 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 ST1802FH?
For technical support, including ST1802FH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST1802FH requirements.
6.How does Aetrix verify that ST1802FH is sourced from the original manufacturer or authorized distributors?
All ST1802FH 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 ST1802FH meets industry standards.
7.What is the process for return or replacement of ST1802FH?
All ST1802FH units undergo pre-shipment inspection (PSI). If there is an issue with ST1802FH, 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 ST1802FH part is unused and in its original packaging.
Return procedure for ST1802FH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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