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STMicroelectronics MD2001FX
- Part No.:
- MD2001FX
- Manufacturer:
- STMicroelectronics
- Category:
- Single Bipolar Transistors
- Package:
- ISOWATT218FX
- Datasheet:
-
MD2001FX.pdf
- Description:
- TRANS NPN 700V 12A ISOWATT-218FX
- Quantity:
- Payment:
- Shipping:
Inventory:4,734
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Product details
Overview
MD2001FX from STMicroelectronics is a high-voltage NPN power transistor designed for horizontal deflection output stages in standard-definition CRT monitors and real-flat TVs. It features 1500 V VCES, 12 A continuous collector current, 58 W total dissipation at TC = 25°C, 2.15 °C/W thermal resistance (junction-to-case), and U.L.-compliant ISOWATT218FX insulated package.
For engineers reviewing the MD2001FX datasheet, MD2001FX pinout, MD2001FX application, or MD2001FX equivalent, key selection criteria include VCES rating, safe operating area under inductive switching, hFE consistency at 6 A, saturation voltage at rated drive, and insulation withstand voltage for heatsink mounting.
Technical Context
The MD2001FX employs diffused-collector planar technology with an enhanced high-voltage structure optimized for horizontal deflection linearity and thermal stability. Its design supports pulsed operation at 64 kHz with 1.6 µH inductive load, delivering tight hFE range (4.5–7) and low base-drive requirements (1.5 A for 6 A IC).
It operates with VCEO(sus) = 700 V at IC = 100 mA and exhibits fast switching performance: ts = 2.6 µs and tf = 0.2 µs under specified inductive test conditions, enabling efficient energy recovery in flyback transformer circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCES | 1500 V - Withstands full CRT flyback voltage without breakdown during retrace |
| IC | 12 A - Sustained horizontal scan current capability for 16:9 SD CRT displays |
| VCE(sat) | 1.8 V @ IC = 6 A, IB = 1.5 A - Limits conduction loss to ≤10.8 W at rated drive |
| Rthj-case | 2.15 °C/W max - Enables 58 W dissipation with ≤125°C case-to-junction rise at 25°C ambient |
| Vins | 2500 V RMS - Ensures galvanic isolation between leads and heatsink per UL safety standards |
| hFE | 4.5–7 @ IC = 6 A - Tight gain spread simplifies base drive design across production lots |
| ts/tf | 2.6 µs / 0.2 µs - Supports clean turn-off and rapid fall in 64 kHz horizontal deflection timing |
Pinout & Package
The MD2001FX is housed in the ISOWATT218FX fully insulated power package, featuring creepage/clearance compliance for high-voltage CRT applications and U.L. recognition for end-equipment safety certification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Control input | Receives TTL-compatible drive signal; requires 1.5 A peak for full 6 A collector conduction |
| 2 (Collector) | High-voltage switch node | Connects to flyback transformer primary; rated for 1500 V transient and 700 V sustaining voltage |
| 3 (Emitter) | Power return path | Low-inductance emitter connection to ground plane; carries full horizontal scan current |
Key Features
| Feature | Design Value |
|---|---|
| Diffused collector "Enhanced generation" structure | Improves silicon efficiency and reduces secondary breakdown risk during flyback energy recovery |
| Tight hFE range at 6 A | Enables consistent base drive design across manufacturing batches without recalibration |
| Low base-drive requirement | Reduces driver transistor stress and heat generation in compact deflection circuit layouts |
| U.L.-compliant insulated package | Eliminates need for additional insulating hardware when mounted on conductive heatsinks |
| Stable performance vs. temperature | Maintains VCE(sat) and hFE within spec across −40°C to +125°C case temperature range |
Applications
| Monitor Horizontal Deflection | Real-Flat TV Horizontal Output |
|---|---|
Use Scenario: Driving flyback transformer in 100–120 kHz horizontal scanning circuits of 15–19 inch CRT monitors. IC Role / Device Role / Timing Role: High-voltage NPN switch controlling primary current pulse duration and amplitude for precise linearity correction. Use Value: 1500 V VCES and 2.15 °C/W Rthj-case ensure reliable operation under repetitive flyback transients and thermal cycling. | Use Scenario: Horizontal deflection stage in slim-profile CRT TVs requiring compact, high-efficiency output transistors. IC Role / Device Role / Timing Role: Primary switching element in quasi-resonant horizontal output stage with integrated damper diode support. Use Value: U.L.-rated insulation and 2500 V RMS withstand voltage enable direct mounting to metal chassis without arcing risk. |
| SD CRT Flyback Energy Recovery | Industrial CRT Display Driver |
Use Scenario: Recovering stored magnetic energy from flyback transformer during horizontal retrace in broadcast-grade SD monitors. IC Role / Device Role / Timing Role: Fast-switching NPN transistor managing inductive turn-off with controlled storage time (2.6 µs) and fall time (0.2 µs). Use Value: Specified ts/tf and SOA curves allow predictable snubberless operation at 64 kHz with 1.6 µH load. | Use Scenario: Embedded CRT-based instrumentation displays in factory automation panels with extended thermal duty cycles. IC Role / Device Role / Timing Role: Robust horizontal output device operating continuously at elevated case temperatures up to 125°C. Use Value: Stable hFE and VCE(sat) over temperature ensure consistent scan geometry without periodic recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage horizontal deflection transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BU508A | VCES = 1500 V, IC = 8 A, Rthj-case = 2.5 °C/W - lower current rating and higher thermal resistance | Limited to smaller CRTs (<17") due to reduced SOA at high IC | Acceptable where peak current stays below 8 A and heatsinking is enhanced |
| 2SC5387 | VCES = 1500 V, hFE = 3–6 @ 6 A, no U.L. insulation rating - wider gain spread and uninsulated TO-3P | Requires external insulator kit and tighter hFE binning for production consistency | Suitable only when cost sensitivity outweighs safety certification and yield requirements |
Compared with BU508A and 2SC5387, the MD2001FX delivers higher continuous current (12 A vs. 8 A/-), superior thermal performance (2.15 vs. 2.5/- °C/W), and built-in U.L. insulation-reducing BOM count and improving long-term reliability in certified consumer CRT designs.
Availability
MD2001FX is available at Aetrix Electronics and suitable for CRT monitor horizontal deflection, real-flat TV output stages, and industrial SD display driver applications requiring stable component supply and long-lifecycle support.
Supply support for MD2001FX 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, designing and manufacturing analog, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.
The MD series targets high-voltage power switching in legacy CRT and specialized analog video systems, emphasizing ruggedness, thermal stability, and safety-compliant packaging for regulated display equipment.
FAQ
What is the maximum safe operating frequency for MD2001FX in horizontal deflection?
The MD2001FX is characterized for 64 kHz operation with a 1.6 µH inductive load, as verified in Figure 9 test circuit. Its 2.6 µs storage time and 0.2 µs fall time support stable switching up to 100 kHz under optimized gate drive and heatsinking-but 64 kHz remains the validated design point for CRT flyback compliance.
Can MD2001FX be used without an insulating washer on a metal heatsink?
Yes. The ISOWATT218FX package provides 2500 V RMS insulation between all three leads and the external heatsink surface, satisfying U.L. requirements. No additional insulator is needed unless local safety regulations impose stricter creepage distances beyond the package's certified rating.
How does hFE variation affect base drive design?
With hFE guaranteed 4.5–7 at 6 A, base current must be designed for worst-case 4.5 gain-requiring ≥1.33 A drive to sustain 6 A collector current. This ensures margin across temperature and lifetime, avoiding saturation loss increase due to hFE degradation in high-stress CRT operation.
Is MD2001FX compliant with RoHS and lead-free soldering standards?
Yes. Per Section 3 of the datasheet, MD2001FX is supplied in ECOPACK® packaging with lead-free second-level interconnect, compliant with JEDEC JESD97. Maximum soldering temperature ratings are marked on inner box labels, supporting standard lead-free reflow profiles without derating.
MD2001FX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- ISOWATT218FX
- Packaging:
- Tube
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 12 A
- Voltage - Collector Emitter Breakdown (Max):
- 700 V
- Vce Saturation (Max) @ Ib, Ic:
- 1.8V @ 1.5A, 6A
- Current - Collector Cutoff (Max):
- 200µA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 4.5 @ 6A, 5V
- Power - Max:
- 58 W
- Frequency - Transition:
- -
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- ISOWATT-218FX
MD2001FX FAQ
1.How can I place an order for MD2001FX through Aetrix?
Please submit a Request for Quotation (RFQ) for MD2001FX 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 MD2001FX reliable?
The price and inventory of MD2001FX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MD2001FX is usually 5 days.
3.What payment methods are accepted for MD2001FX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MD2001FX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MD2001FX?
MD2001FX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MD2001FX 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 MD2001FX?
For technical support, including MD2001FX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MD2001FX requirements.
6.How does Aetrix verify that MD2001FX is sourced from the original manufacturer or authorized distributors?
All MD2001FX 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 MD2001FX meets industry standards.
7.What is the process for return or replacement of MD2001FX?
All MD2001FX units undergo pre-shipment inspection (PSI). If there is an issue with MD2001FX, 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 MD2001FX part is unused and in its original packaging.
Return procedure for MD2001FX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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