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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

STMicroelectronics STP03D200

Name: STP03D200
Brand: STMicroelectronics
SKU: STP03D200
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STP03D200

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: TO-220-3

Datasheet:: STP03D200.pdf

Description:: TRANS NPN DARL 1200V 0.1A TO-220

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STP03D200 from STMicroelectronics is a 2 kV NPN Darlington transistor in TO-220 package, configured as two cascaded high-voltage NPN transistors for active start-up networks in three-phase switched-mode power supplies. It delivers 1200 V V_CEO, 2000 V V_CBO, 230× DC current gain at 20 mA, 40 W total dissipation, and operates up to 150 °C junction temperature.

For engineers reviewing the STP03D200 datasheet, STP03D200 pinout, STP03D200 application, or STP03D200 equivalent, key selection criteria include verified 1200 V collector-emitter breakdown, Darlington-configured high h_FE for low-drive-start circuits, TO-220 thermal resistance (3.13 °C/W), and compliance with AN2454 active start-up reference design.

Technical Context

The STP03D200 implements a monolithic Darlington pair-two NPN transistors integrated in series-to achieve high voltage blocking (2000 V V_CBO) while maintaining usable current gain (min 200 at 30 mA). Its internal structure eliminates external base drive complexity for high-side start-up applications.

Designed specifically for unregulated auxiliary supply activation, it operates in linear mode during initial power-up, sustaining 1200 V V_CEO with only 500 µA base current required to saturate at 50 mA collector load, enabling direct connection to rectified mains without additional bias circuitry.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	1200 V - supports direct connection to 850 VDC rectified three-phase mains without snubbers
V_CBO	2000 V - enables safe operation under transient overvoltage conditions in industrial SMPS
h_FE	230 (min @ 20 mA) - reduces required base drive current, simplifying start-up resistor network design
R_thJC	3.13 °C/W - allows 40 W dissipation with ≤125 °C case-to-ambient delta in heatsink-mounted configuration
V_CE(sat)	2 V @ 50 mA/500 µA - limits power loss during start-up phase, minimizing thermal stress on auxiliary winding
T_J(max)	150 °C - ensures reliability in enclosed, convection-cooled SMPS enclosures with ambient up to 75 °C

Pinout & Package

TO-220 package with insulated tab (pin 2), emitter-out (pin 3), and collector-in (pin 1). Tab is electrically connected to collector for direct heatsink mounting with minimal isolation requirements.

Pin/Terminal	Circuit Role	Design Meaning
1 (Collector)	Main high-voltage current path input	Connected to rectified DC bus; rated for 1200 V continuous and 2000 V peak blocking
2 (Tab)	Collector (mechanically exposed)	Electrically tied to pin 1; requires insulating washer when mounted to grounded heatsink
3 (Emitter)	Current output node	Drives start-up resistor network into UC384x or similar PWM controller V_CC pin

Key Features

Feature	Design Value
Darlington configuration	Integrated dual-NPN structure eliminates external base resistor matching and layout sensitivity
2 kV collector-base rating	Enables use in 690 VAC three-phase systems with 2× safety margin against line surges
High h_FE (230 min)	Reduces start-up resistor power dissipation by >60% versus single high-voltage transistor alternatives
TO-220 thermal performance	3.13 °C/W R_thJC supports full 40 W dissipation with standard 10 cm² aluminum heatsink

Applications

Industrial Three-Phase SMPS Start-Up

High-Voltage Auxiliary Supply Activation

Use Scenario: Initiating power to PWM controller ICs before main converter regulation engages in 400–800 VDC industrial SMPS.

IC Role / Device Role / Timing Role: High-voltage linear pass element providing controlled current to V_CC rail during first 100–500 ms of power-on.

Use Value: Eliminates need for Zener-clamped resistive divider; sustains 1200 V blocking while delivering 50 mA with <2 V drop.

Use Scenario: Powering control circuitry in HVDC distribution systems where auxiliary supply must survive 1.5 kV transients.

IC Role / Device Role / Timing Role: Primary start-up switch in unregulated auxiliary converter feeding isolated gate drivers and monitoring ICs.

Use Value: 2000 V V_CBO withstand prevents latch-up during lightning-induced surges on DC bus lines.

Energy-Efficient Motor Drive Power Sequencing

Uninterruptible Power Supply (UPS) Hold-Up Initiation

Use Scenario: Enabling gate driver bias in multi-kW servo inverters during cold start, prior to DC link stabilization.

IC Role / Device Role / Timing Role: Darlington pass transistor sourcing current to isolated DC-DC bias rails during pre-charge phase.

Use Value: 230× h_FE allows microamp-level base current from auxiliary winding, reducing no-load losses by 35% vs discrete solutions.

Use Scenario: Charging hold-up capacitor banks in online UPS systems after AC failure, before battery backup engages.

IC Role / Device Role / Timing Role: High-voltage linear regulator controlling charge current into 400 V bulk capacitor bank.

Use Value: 40 W dissipation rating supports 100 mA sustained charging current at 400 V, enabling sub-second hold-up initiation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage Darlington start-up applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BU508AF	Single NPN, 1500 V V_CEO, h_FE = 10–40 - requires external base drive network	Lacks integrated Darlington gain; needs higher base current and additional components for same start-up function	Select when cost sensitivity outweighs board space and thermal optimization needs
STN12120	2000 V V_CBO, but MOSFET-based; R_DS(on) = 12 Ω, no DC gain - operates as voltage-controlled switch	Requires gate driver IC; unsuitable for linear-mode start-up due to lack of analog control region	Prefer for pulsed or digitally gated auxiliary activation, not linear start-up sequencing

Compared with BU508AF and STN12120, the STP03D200 uniquely combines monolithic Darlington gain, 1200 V linear-mode capability, and TO-220 thermal performance-enabling compact, component-minimized start-up networks without external biasing or gate drivers.

Availability

STP03D200 is available at Aetrix Electronics and suitable for industrial three-phase SMPS, high-voltage auxiliary supply activation, and energy-efficient motor drive power sequencing requiring stable component supply across extended production lifecycles.

Supply support for STP03D200 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, discrete devices, and MEMS sensors for industrial, automotive, and consumer markets.

The STP03D200 belongs to ST's high-voltage power transistor product line, engineered specifically for reliable start-up and auxiliary power management in ruggedized off-line power conversion systems.

FAQ

What is the maximum continuous collector current for STP03D200?

The STP03D200 has a maximum continuous collector current (I_C) of 100 mA at T_C = 25 °C. This rating assumes adequate heatsinking to maintain case temperature within limits; derating is required above 25 °C per the R_thJC = 3.13 °C/W thermal resistance specification.

Can STP03D200 be used in avalanche mode?

No-STP03D200 is not rated or characterized for repetitive avalanche operation. Its absolute maximum V_CEO of 1200 V defines safe linear-mode operation only; intentional avalanche stress may cause parametric shift or catastrophic failure per ST's application note AN2454 guidance.

Is the TO-220 tab electrically isolated?

No-the TO-220 tab (pin 2) is internally connected to the collector (pin 1). When mounting to a heatsink, an insulating washer and shoulder washer must be used if the heatsink is grounded or at a different potential than the collector node.

Does STP03D200 meet RoHS and REACH requirements?

Yes-STP03D200 is manufactured in ST's ECOPACK®-compliant TO-220 package, meeting RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Full compliance documentation is available via ST's official product page using order code STP03D200.

STP03D200 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Active

Transistor Type:: NPN - Darlington

Current - Collector (Ic) (Max):: 100 mA

Voltage - Collector Emitter Breakdown (Max):: 1200 V

Vce Saturation (Max) @ Ib, Ic:: 2V @ 500µA, 50mA

Current - Collector Cutoff (Max):: 100µA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 200 @ 30mA, 10V

Power - Max:: 40 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

STP03D200 FAQ

1.How can I place an order for STP03D200 through Aetrix?

Please submit a Request for Quotation (RFQ) for STP03D200 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 STP03D200 reliable?

The price and inventory of STP03D200 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STP03D200 is usually 5 days.

3.What payment methods are accepted for STP03D200?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STP03D200 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STP03D200?

STP03D200 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STP03D200 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 STP03D200?

For technical support, including STP03D200 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STP03D200 requirements.

6.How does Aetrix verify that STP03D200 is sourced from the original manufacturer or authorized distributors?

All STP03D200 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 STP03D200 meets industry standards.

7.What is the process for return or replacement of STP03D200?

All STP03D200 units undergo pre-shipment inspection (PSI). If there is an issue with STP03D200, 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 STP03D200 part is unused and in its original packaging.

Return procedure for STP03D200:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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