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

onsemi 2SC4548E-TD-E

Name: 2SC4548E-TD-E
Brand: onsemi
SKU: 2SC4548E-TD-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SC4548E-TD-E

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: 2SC4548E-TD-E.pdf

Description:: TRANS NPN 400V 0.2A PCP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2SC4548E-TD-E from SANYO is an NPN triple-diffused planar silicon transistor designed for high-voltage driver applications, featuring V_CEO = −400 V, I_C = −200 mA, P_C = 1.3 W, h_FE = 200–600 (rank E), and f_T = 70 MHz - used in horizontal deflection output stages of CRT displays.

For engineers reviewing the 2SC4548E-TD-E datasheet, pinout, applications, or equivalent options, key selection criteria include breakdown voltage margin, switching speed (t_ON = 0.25 µs, t_OFF = 0.5 µs), h_FE linearity, and ceramic-board thermal mounting requirements.

Technical Context

This transistor employs SANYO's MBIT (Multi-Base Integrated Technology) process to achieve stable high-voltage operation and excellent h_FE linearity across collector current. Its −400 V V_CEO and −400 V V_CBO ratings support robust flyback energy handling in line-output circuits.

The device operates with base-emitter reverse bias up to −5 V and exhibits low output capacitance (C_obo = 5 pF at V_CB = −30 V, f = 1 MHz), enabling efficient high-frequency switching in CRT horizontal deflection systems.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−400 V: Withstands full flyback voltage in CRT horizontal output without breakdown.
I_C	−200 mA continuous: Supports peak line-output current in standard TV/monitor deflection stages.
P_C	1.3 W on ceramic board (250 mm² × 0.8 mm): Requires thermally optimized PCB layout for reliability.
h_FE	200–600 (rank E): Tight DC current gain distribution ensures consistent drive capability across production lots.
f_T	70 MHz at V_CE = −30 V, I_C = −10 mA: Enables clean switching at horizontal scan frequencies (15.625–16.67 kHz).
t_ON/t_OFF	0.25 µs / 0.5 µs: Fast turn-on/turn-off minimizes switching loss and waveform distortion.
C_obo	5 pF at V_CB = −30 V, f = 1 MHz: Low output capacitance reduces capacitive loading on driver stage.

Pinout & Package

Package: TO-126 (PCP), molded plastic with metal tab, bottom view marking "CN" for 2SC4548.

Pin/Terminal	Circuit Role	Design Meaning
Collector (C)	Main current sink terminal	Connected to heat sink via metal tab; carries full horizontal output current and flyback energy.
Base (B)	Control input	Receives drive signal from preceding stage; requires current-limiting resistor due to −5 V V_BE reverse rating.
Emitter (E)	Current source reference	Returned to ground or damper circuit; forms low-impedance path for retrace current.

Key Features

Feature	Design Value
High breakdown voltage	V_CBO = V_CEO = −400 V enables safe operation under CRT flyback stress conditions.
MBIT process integration	Ensures uniform base doping and reduced base resistance for improved switching consistency.
h_FE linearity	Minimal gain variation over I_C range supports accurate current-mode drive in deflection circuits.
Ceramic-board thermal design	1.3 W power dissipation validated only on specified 250 mm² × 0.8 mm ceramic substrate.

Applications

Horizontal Deflection Output	Line Output Stage
Use Scenario: Horizontal scanning in analog CRT televisions and monitors. IC Role / Device Role / Timing Role: Main switching transistor in flyback transformer primary circuit. Use Value: −400 V rating safely clamps flyback spikes; fast t_ON/t_OFF preserves linearity of scan waveform.	Use Scenario: High-voltage pulse generation for CRT anode supply (EHT). IC Role / Device Role / Timing Role: Switching element driving step-up transformer in EHT generator. Use Value: Low C_obo (5 pF) minimizes capacitive losses at ~15.6 kHz; h_FE rank E ensures predictable drive current.
Monitor Power Supply	Industrial Display Driver
Use Scenario: Regulated high-voltage supply in professional CRT monitors. IC Role / Device Role / Timing Role: Series pass transistor in quasi-resonant SMPS front-end. Use Value: 1.3 W dissipation capacity supports continuous duty cycle; V_CEO margin prevents avalanche failure during load transients.	Use Scenario: Raster-scan timing control in industrial test equipment displays. IC Role / Device Role / Timing Role: Precision current switch synchronizing deflection and blanking signals. Use Value: Tight h_FE tolerance (200–600) enables repeatable current gain calibration across units.

Horizontal Deflection Output

Line Output Stage

Use Scenario: Horizontal scanning in analog CRT televisions and monitors.

IC Role / Device Role / Timing Role: Main switching transistor in flyback transformer primary circuit.

Use Value: −400 V rating safely clamps flyback spikes; fast t_ON/t_OFF preserves linearity of scan waveform.

Use Scenario: High-voltage pulse generation for CRT anode supply (EHT).

IC Role / Device Role / Timing Role: Switching element driving step-up transformer in EHT generator.

Use Value: Low C_obo (5 pF) minimizes capacitive losses at ~15.6 kHz; h_FE rank E ensures predictable drive current.

Monitor Power Supply

Industrial Display Driver

Use Scenario: Regulated high-voltage supply in professional CRT monitors.

IC Role / Device Role / Timing Role: Series pass transistor in quasi-resonant SMPS front-end.

Use Value: 1.3 W dissipation capacity supports continuous duty cycle; V_CEO margin prevents avalanche failure during load transients.

Use Scenario: Raster-scan timing control in industrial test equipment displays.

IC Role / Device Role / Timing Role: Precision current switch synchronizing deflection and blanking signals.

Use Value: Tight h_FE tolerance (200–600) enables repeatable current gain calibration across units.

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
2SC4548A-TD-E	Same package and pinout; h_FE rank A (120–240), lower gain spread.	Suitable where tighter low-current gain control is needed, but insufficient for high-gain drive stages.	Select 2SC4548A-TD-E only if system-level gain budget allows lower h_FE minimum.
BU2520A	V_CEO = −1500 V, I_C = −10 A, TO-218 package - significantly higher voltage/current capability.	Over-specified for standard CRT deflection; requires larger heatsink and revised gate drive.	Choose BU2520A only when upgrading legacy designs to support higher resolution or longer trace times.

Compared with 2SC4548A-TD-E and BU2520A, the 2SC4548E-TD-E offers optimal balance of gain linearity, thermal footprint, and flyback voltage margin for cost-sensitive CRT horizontal output stages - neither under-specified nor over-engineered.

Availability

2SC4548E-TD-E is available at Aetrix Electronics and suitable for CRT display manufacturing, analog monitor repair, and industrial raster-scan system maintenance requiring stable component supply and long-lifecycle sourcing.

Supply support for 2SC4548E-TD-E 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

SANYO Electric Co., Ltd. was a Japanese semiconductor manufacturer specializing in power transistors, optoelectronics, and analog ICs before its acquisition by Panasonic in 2011.

The 2SC4548E-TD-E belongs to SANYO's high-voltage NPN transistor product line, engineered specifically for horizontal deflection and EHT generation in analog CRT video systems.

FAQ

What is the maximum collector-emitter voltage rating for the 2SC4548E-TD-E?

The 2SC4548E-TD-E has a guaranteed V_CEO rating of −400 V at T_a = 25 °C. This rating is validated under pulsed test conditions and must be derated linearly above 25 °C ambient per the junction temperature limit of 150 °C. Operation beyond this rating risks avalanche breakdown and permanent damage to the 2SC4548E-TD-E.

How is the "E" suffix in 2SC4548E-TD-E defined?

The "E" in 2SC4548E-TD-E denotes the h_FE gain rank, specifying a DC current gain range of 200–600 at I_C = −50 mA and V_CE = −10 V. This rank is verified per SANYO's internal sorting and marked as "CN" on the device body. The 2SC4548E-TD-E is not interchangeable with D-rank (100–200) or A-rank (120–240) variants without circuit validation.

Can the 2SC4548E-TD-E be mounted on standard FR-4 PCB instead of ceramic?

No - the 1.3 W power dissipation rating for the 2SC4548E-TD-E is specified only when mounted on a 250 mm² × 0.8 mm ceramic board. FR-4 has significantly lower thermal conductivity; using it would cause junction temperature to exceed 150 °C even at moderate duty cycles, leading to premature failure of the 2SC4548E-TD-E.

What does the "TD" in 2SC4548E-TD-E indicate?

The "TD" suffix in 2SC4548E-TD-E identifies the tape-and-reel packaging format per SANYO's ordering nomenclature, indicating the device is supplied in embossed carrier tape compatible with automated placement equipment. It does not affect electrical or thermal specifications of the 2SC4548E-TD-E itself.

Is the 2SC4548E-TD-E suitable for modern LCD or OLED display backlight drivers?

No - the 2SC4548E-TD-E is optimized for high-voltage, medium-speed switching in CRT horizontal deflection circuits, not for high-frequency PWM LED drivers. Its 70 MHz f_T and µs-scale switching times are mismatched to typical 100+ kHz LED dimming requirements, and its −400 V rating exceeds needs for low-voltage backlight topologies. Use dedicated LED driver ICs instead of the 2SC4548E-TD-E.

2SC4548E-TD-E Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-243AA

Packaging:: Bulk

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 200 mA

Voltage - Collector Emitter Breakdown (Max):: 400 V

Vce Saturation (Max) @ Ib, Ic:: 600mV @ 5mA, 50mA

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 50mA, 10V

Power - Max:: 1.3 W

Frequency - Transition:: 70MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PCP

2SC4548E-TD-E FAQ

1.How can I place an order for 2SC4548E-TD-E through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SC4548E-TD-E 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 2SC4548E-TD-E reliable?

The price and inventory of 2SC4548E-TD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SC4548E-TD-E is usually 5 days.

3.What payment methods are accepted for 2SC4548E-TD-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SC4548E-TD-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SC4548E-TD-E?

2SC4548E-TD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SC4548E-TD-E 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 2SC4548E-TD-E?

For technical support, including 2SC4548E-TD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SC4548E-TD-E requirements.

6.How does Aetrix verify that 2SC4548E-TD-E is sourced from the original manufacturer or authorized distributors?

All 2SC4548E-TD-E 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 2SC4548E-TD-E meets industry standards.

7.What is the process for return or replacement of 2SC4548E-TD-E?

All 2SC4548E-TD-E units undergo pre-shipment inspection (PSI). If there is an issue with 2SC4548E-TD-E, 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 2SC4548E-TD-E part is unused and in its original packaging.

Return procedure for 2SC4548E-TD-E:

1.Submit a request within 90 days.

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

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