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

STMicroelectronics HD1750JL

Name: HD1750JL
Brand: STMicroelectronics
SKU: HD1750JL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HD1750JL

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: TO-264-3, TO-264AA

Datasheet:: HD1750JL.pdf

Description:: TRANS NPN 800V 24A TO-264

Quantity:: RFQ Add To RFQ list

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Inventory:3,961

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Product details

Overview

HD1750JL from STMicroelectronics is a very high-voltage NPN power transistor designed for horizontal deflection stages in high-definition and slim CRT displays. It features V_CES = 1700 V, I_C = 24 A, P_TOT = 200 W at T_C = 25°C, and R_thJ-C = 0.625 °C/W, operating up to T_J = 150°C in TO-264 package.

For engineers reviewing the HD1750JL datasheet, HD1750JL pinout, HD1750JL application, or HD1750JL equivalent, key selection criteria include sustained 800 V V_CEO(sus) under inductive flyback, low V_CE(sat) = 3 V at 12 A/3 A drive, and robust switching performance (t_s = 3 µs, t_f = 300 ns) in CRT horizontal output circuits.

Technical Context

The HD1750JL implements diffused-collector planar technology with Enhanced High Voltage Structure 1 (E.H.V.S.1), enabling stable operation across wide temperature ranges and relaxed drive conditions. Its design targets high-reliability horizontal deflection in CRTs requiring >1200 V flyback voltage handling and precise timing control.

It delivers specified V_CEO(sus) = 800 V under pulsed conditions (300 µs, <2% duty), supports I_CM = 36 A peak collector current, and maintains h_FE = 5.5–8.5 at 12 A, ensuring predictable gain in high-current switching applications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CES	1700 V - maximum blocking voltage with base open, critical for CRT flyback energy recovery
V_CEO(sus)	800 V - sustaining voltage under inductive load, defines safe operation during horizontal retrace
I_C / I_CM	24 A continuous / 36 A peak - supports high-power horizontal deflection current pulses
V_CE(sat)	3 V @ 12 A/3 A - low saturation loss reduces thermal stress in high-duty-cycle CRT output stage
R_thJ-C	0.625 °C/W - enables 200 W dissipation with modest heatsink, essential for compact CRT chassis
t_s/t_f	3 µs / 300 ns @ 12 A - fast switching minimizes transition losses during 15.7 kHz horizontal scanning
h_FE	5.5–8.5 @ 12 A - stable current gain ensures consistent drive requirements across production units

Pinout & Package

HD1750JL is housed in TO-264 package: isolated metal tab, 3-pin single-ended configuration, screw-mount compatible, with case acting as collector terminal.

Pin/Terminal	Circuit Role	Design Meaning
1 (Tab)	Collector	Electrically connected to metal case; requires insulated mounting and direct heatsinking
2	Base	Control input; accepts 3 A DC drive for full saturation under 12 A load
3	Emitter	Power return path; carries full load current and must be routed with low-inductance layout

Key Features

Feature	Design Value
Diffused-collector E.H.V.S.1 structure	Enables 1700 V V_CES with improved temperature stability vs. conventional HV transistors
Low V_CE(sat) at high current	3 V @ 12 A/3 A reduces conduction loss by >25% compared to legacy 1500 V CRT transistors
Controlled switching times	t_s = 3 µs and t_f = 300 ns ensure clean horizontal scan transitions without ringing
ECOPACK® lead-free construction	Meets JEDEC JESD97 marking and RoHS compliance without compromising thermal or HV performance

Applications

High-Definition CRT TV

Slender CRT Monitor

Use Scenario: Horizontal deflection circuit driving yoke in 1080i/720p CRT TVs with <100 mm depth.

IC Role / Device Role / Timing Role: Primary switch in resonant flyback topology; handles 15.734 kHz retrace with 1320 V flyback peaks.

Use Value: V_CEO(sus) = 800 V and t_f = 300 ns prevent secondary breakdown during rapid turn-off under high V_CE.

Use Scenario: Compact monitor chassis requiring minimal heatsink volume and high reliability over 30,000-hour life.

IC Role / Device Role / Timing Role: Horizontal output transistor in S-correction integrated design with dynamic focus compensation.

Use Value: R_thJ-C = 0.625 °C/W allows 200 W dissipation with 12 K/W heatsink, reducing thermal derating.

Professional Broadcast Monitor

Medical Imaging CRT Display

Use Scenario: Studio-grade RGB CRT monitor demanding sub-pixel geometry stability and zero line jitter.

IC Role / Device Role / Timing Role: Precision horizontal sweep generator with tight gain tolerance (h_FE = 5.5–8.5) and low parameter drift.

Use Value: Stable h_FE across temperature ensures consistent drive current and scan linearity.

Use Scenario: Diagnostic imaging system CRT requiring fail-safe operation and long-term parameter consistency.

IC Role / Device Role / Timing Role: Critical horizontal deflection element in FDA-cleared imaging equipment with strict thermal margin requirements.

Use Value: T_J(max) = 150°C and -65°C to 150°C storage range support extended field deployment in variable ambient conditions.

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	V_CES = 1500 V, I_C = 15 A, R_thJ-C = 1.0 °C/W - lower voltage rating and higher thermal resistance	Used in standard-definition CRTs; insufficient for 1700 V blocking or slim-chassis thermal constraints	Select only if V_CE stress remains <1400 V and heatsink capacity exceeds 8 K/W
2SC5387	V_CES = 1700 V, I_C = 15 A, t_f = 500 ns - matched voltage but lower current and slower switching	Common in Japanese OEM monitors; lacks drive strength for high-resolution 100 kHz+ horizontal sync	Acceptable for 1024×768 @ 60 Hz systems but not for 1280×1024 @ 75 Hz with tight flyback margins

Compared with BU508A and 2SC5387, HD1750JL uniquely combines 1700 V blocking, 24 A current capability, and sub-microsecond fall time-enabling higher resolution, slimmer CRT designs, and improved thermal headroom without sacrificing switching fidelity.

Availability

HD1750JL is available at Aetrix Electronics and suitable for high-definition CRT TV manufacturing, professional broadcast monitor production, medical imaging display systems, and industrial test equipment requiring stable component supply and long-lifecycle support.

Supply support for HD1750JL 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

HD1750JL belongs to ST's high-voltage power transistor product line, engineered specifically for CRT horizontal deflection stages where reliability under repetitive high-voltage stress and precise timing control are mandatory.

FAQ

Is HD1750JL RoHS-compliant and lead-free?

Yes. HD1750JL is manufactured in an ECOPACK® package with lead-free second-level interconnect, compliant with JEDEC Standard JESD97 and EU Directive 2002/95/EC (RoHS). The inner box label indicates the lead-free category and soldering profile limits.

What is the recommended gate/base drive for reliable saturation?

For full saturation at I_C = 12 A, apply I_B = 3 A DC (h_FE min ≈ 4). Drive circuit must deliver ±7.25 A peak reverse current during turn-off to achieve t_s = 3 µs and prevent secondary breakdown under 1320 V flyback.

Can HD1750JL replace BU2520DX in existing CRT designs?

No. BU2520DX has V_CES = 1500 V and I_C = 10 A. HD1750JL's higher voltage (1700 V), current (24 A), and dissipation (200 W) require revised heatsinking, drive strength, and SOA layout-direct replacement risks thermal runaway or overstress.

Does HD1750JL support 100 kHz horizontal scanning?

Yes, under defined conditions: t_s = 1.6 µs and t_f = 110 ns measured at I_C = 6.5 A with 0.25 µH inductance and 100 kHz repetition rate. Full 12 A operation at 100 kHz requires active forced-air cooling and optimized PCB layout to manage switching losses.

HD1750JL Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-264-3, TO-264AA

Packaging:: Tube

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 24 A

Voltage - Collector Emitter Breakdown (Max):: 800 V

Vce Saturation (Max) @ Ib, Ic:: 3V @ 3A, 12A

Current - Collector Cutoff (Max):: 200µA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 5.5 @ 12A, 5V

Power - Max:: 200 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-264

HD1750JL FAQ

1.How can I place an order for HD1750JL through Aetrix?

Please submit a Request for Quotation (RFQ) for HD1750JL 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 HD1750JL reliable?

The price and inventory of HD1750JL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HD1750JL is usually 5 days.

3.What payment methods are accepted for HD1750JL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HD1750JL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HD1750JL?

HD1750JL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HD1750JL 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 HD1750JL?

For technical support, including HD1750JL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HD1750JL requirements.

6.How does Aetrix verify that HD1750JL is sourced from the original manufacturer or authorized distributors?

All HD1750JL 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 HD1750JL meets industry standards.

7.What is the process for return or replacement of HD1750JL?

All HD1750JL units undergo pre-shipment inspection (PSI). If there is an issue with HD1750JL, 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 HD1750JL part is unused and in its original packaging.

Return procedure for HD1750JL:

1.Submit a request within 90 days.

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

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