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

onsemi 2SC3503E

Name: 2SC3503E
Brand: onsemi
SKU: 2SC3503E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SC3503E

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-225AA, TO-126-3

Datasheet:: 2SC3503E.pdf

Description:: TRANS NPN 300V 0.1A TO-126-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2SC3503E from SANYO is an NPN epitaxial planar silicon transistor designed for high-voltage video output stages in CRT displays, featuring V_CEO ≥ 300 V, f_T = 150 MHz at I_C = −10 mA and V_CE = −30 V, and C_re = 1.8 pF at V_CB = −30 V. It operates with I_C up to −100 mA and P_C = 1.2 W in TO-126 package.

For engineers reviewing the 2SC3503E datasheet, pinout, applications, or equivalent options, key selection considerations include high-voltage switching capability, low reverse transfer capacitance for stable video signal integrity, DC current gain classification (rank E: h_FE = 120–240), and thermal derating above 25°C ambient.

Technical Context

The 2SC3503E is a discrete bipolar junction transistor optimized for linear video output amplification in analog CRT display systems. Its high V_CEO rating supports operation across full scan-line voltage swings, while its low C_re minimizes high-frequency signal distortion and feedback instability in wideband video drivers.

It uses SANYO's MBIT process for improved consistency in h_FE distribution and thermal stability. The device is specified with strict absolute maximum ratings-including T_j = 150°C and storage range of −55°C to +150°C-and requires external heat sinking for continuous operation above ~50°C ambient due to its 1.2 W power dissipation limit at T_c = 25°C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−300 V: Enables safe operation in CRT anode drive and deflection circuits with high flyback voltages.
f_T	150 MHz at I_C = −10 mA, V_CE = −30 V: Supports bandwidth-critical video output without phase shift or gain roll-off.
C_re	1.8 pF at V_CB = −30 V, f = 1 MHz: Minimizes Miller effect and ensures stable high-frequency response in common-emitter configurations.
h_FE (Rank E)	120–240 at I_C = −10 mA, V_CE = −10 V: Provides predictable DC biasing and gain control in linear amplifier stages.
V_CE(sat)	−0.5 V max at I_C = −100 mA, I_B = −10 mA: Ensures low conduction loss and minimal heating during saturated switching in pulse output circuits.
P_C	1.2 W at T_c = 25°C: Requires heatsink design for sustained video output duty cycles above 25°C case temperature.

Pinout & Package

SANYO TO-126 package: molded plastic case with metal tab (collector-connected), 3-pin vertical mounting, 2.7 mm lead pitch, 15.5 mm body length, and integral heat-dissipating flange.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal	Connected to ground or low-impedance return path; polarity defines NPN operation and bias direction.
2 (Collector)	Current source terminal	Internally bonded to metal tab; must be electrically isolated from heatsink unless collector-common configuration is intended.
3 (Base)	Control input terminal	Receives forward-biased drive current; small-signal input impedance requires precise current-limited bias network design.

Key Features

Feature	Design Value
High breakdown voltage	V_CEO ≥ 300 V enables use in CRT horizontal deflection and high-voltage video output without snubbing or clamping.
Low reverse transfer capacitance	C_re = 1.8 pF reduces Miller feedback, preserving video signal fidelity and preventing oscillation in broadband amplifiers.
MBIT process technology	Ensures tight h_FE distribution (Rank E: 120–240) and consistent thermal characteristics across production lots.
TO-126 thermal design	Metal tab provides direct thermal path to heatsink; 1.2 W P_C rating supports continuous video output at moderate ambient temperatures.

Applications

High-Definition CRT Video Output	Horizontal Deflection Driver
Use Scenario: Amplifying RGB video signals prior to CRT cathode drive in professional broadcast monitors. IC Role / Device Role / Timing Role: Linear NPN output stage delivering ±100 mA peak current into 75 Ω load with <1% harmonic distortion. Use Value: High V_CEO and low C_re maintain signal integrity across 0–10 MHz video bandwidth without compensation networks.	Use Scenario: Switching high-current sawtooth waveform in CRT horizontal deflection yoke circuits. IC Role / Device Role / Timing Role: High-voltage switch controlling flyback energy recovery and linearity correction timing. Use Value: 300 V V_CEO withstands flyback spikes up to −280 V, eliminating need for external clamping diodes.
Legacy Broadcast Equipment Repair	Analog Test Instrumentation
Use Scenario: Replacement transistor in discontinued oscilloscope vertical amplifier modules requiring high-voltage linearity. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with stable h_FE and minimal thermal drift over 0–50°C. Use Value: Rank E h_FE binning (120–240) allows accurate gain calibration without individual unit trimming.	Use Scenario: Signal conditioning stage in analog function generators producing clean 1–5 MHz square and ramp outputs. IC Role / Device Role / Timing Role: Fast-switching emitter-follower buffer isolating DAC output from reactive loads. Use Value: 150 MHz f_T ensures flat gain response and sub-nanosecond edge fidelity in pulse generation paths.

High-Definition CRT Video Output

Horizontal Deflection Driver

Use Scenario: Amplifying RGB video signals prior to CRT cathode drive in professional broadcast monitors.

IC Role / Device Role / Timing Role: Linear NPN output stage delivering ±100 mA peak current into 75 Ω load with <1% harmonic distortion.

Use Value: High V_CEO and low C_re maintain signal integrity across 0–10 MHz video bandwidth without compensation networks.

Use Scenario: Switching high-current sawtooth waveform in CRT horizontal deflection yoke circuits.

IC Role / Device Role / Timing Role: High-voltage switch controlling flyback energy recovery and linearity correction timing.

Use Value: 300 V V_CEO withstands flyback spikes up to −280 V, eliminating need for external clamping diodes.

Legacy Broadcast Equipment Repair

Analog Test Instrumentation

Use Scenario: Replacement transistor in discontinued oscilloscope vertical amplifier modules requiring high-voltage linearity.

IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with stable h_FE and minimal thermal drift over 0–50°C.

Use Value: Rank E h_FE binning (120–240) allows accurate gain calibration without individual unit trimming.

Use Scenario: Signal conditioning stage in analog function generators producing clean 1–5 MHz square and ramp outputs.

IC Role / Device Role / Timing Role: Fast-switching emitter-follower buffer isolating DAC output from reactive loads.

Use Value: 150 MHz f_T ensures flat gain response and sub-nanosecond edge fidelity in pulse generation paths.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN high-voltage video transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
2SC3854	V_CEO = −250 V, f_T = 120 MHz, C_re = 2.5 pF, TO-126	Lower breakdown margin and higher C_re reduce safety margin in CRT flyback circuits.	Select only if operating V_CE remains ≤ −200 V and bandwidth requirements are ≤ 8 MHz.
BU2520A	V_CEO = −1500 V, f_T = 4 MHz, C_re = 15 pF, TO-220	Optimized for horizontal output switching-not linear video amplification-with much lower bandwidth and higher capacitance.	Use only in high-voltage switching roles; unsuitable for video signal fidelity-critical stages.

Compared with 2SC3503E, 2SC3854 offers reduced voltage headroom and higher capacitive loading, while BU2520A trades bandwidth and linearity for extreme voltage capability-neither is pin-compatible, and both require PCB layout changes and circuit revalidation.

Availability

2SC3503E is available at Aetrix Electronics and suitable for CRT video output stages, horizontal deflection drivers, legacy broadcast equipment repair, and analog test instrumentation requiring stable component supply and long-term obsolescence support.

Supply support for 2SC3503E 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 analog and power devices before its acquisition by Panasonic in 2012; its transistor product lines remain widely used in industrial and legacy display systems.

The 2SC3503E belongs to SANYO's high-voltage video transistor family, engineered specifically for linear amplification and switching in analog CRT display systems where high V_CEO, low C_re, and stable h_FE are critical.

FAQ

What is the maximum collector-emitter voltage rating for the 2SC3503E?

The 2SC3503E has a guaranteed minimum V_CEO rating of −300 V at T_a = 25°C. This rating applies under DC or pulsed conditions with proper heatsinking and must not be exceeded even momentarily, as SANYO explicitly disclaims liability for operation beyond absolute maximum ratings. Derating is required above 25°C ambient per the PC–Ta curve in the datasheet.

How is the 2SC3503E classified by DC current gain (h_FE)?

The 2SC3503E is classified as Rank E, meaning its h_FE falls within 120–240 when measured at I_C = −10 mA and V_CE = −10 V, T_a = 25°C. This binning ensures predictable bias point stability in linear video amplifier designs and eliminates need for unit-level gain matching in production.

Does the 2SC3503E have a built-in heatsink connection?

Yes-the collector terminal of the 2SC3503E is internally connected to the metal tab of its TO-126 package. This tab serves as the primary thermal interface and must be mounted to an insulated heatsink using appropriate hardware. Electrical isolation is mandatory unless the circuit design intentionally uses the collector as the common reference point.

What is the typical reverse transfer capacitance (C_re) of the 2SC3503E and why does it matter?

The 2SC3503E exhibits C_re = 1.8 pF at V_CB = −30 V and f = 1 MHz. This low value directly limits Miller feedback in common-emitter video amplifiers, preserving bandwidth and preventing high-frequency oscillation-critical for maintaining sharp edges and color fidelity in CRT video signals.

Can the 2SC3503E replace the 2SC3503 without modification?

Yes-the 2SC3503E is the enhanced reliability version of the original 2SC3503, sharing identical pinout, electrical specifications, and TO-126 package. The "E" suffix denotes updated manufacturing process and tighter parameter control (e.g., h_FE binning), making it a direct drop-in replacement in all legacy designs using the base 2SC3503 part.

2SC3503E Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-225AA, TO-126-3

Packaging:: Bulk

Product Status:: Active

Transistor Type:: NPN

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

Voltage - Collector Emitter Breakdown (Max):: 300 V

Vce Saturation (Max) @ Ib, Ic:: 600mV @ 2mA, 20mA

Current - Collector Cutoff (Max):: 100nA

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

Power - Max:: 7 W

Frequency - Transition:: 150MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-126-3

2SC3503E FAQ

1.How can I place an order for 2SC3503E through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SC3503E 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 2SC3503E reliable?

The price and inventory of 2SC3503E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SC3503E is usually 5 days.

3.What payment methods are accepted for 2SC3503E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SC3503E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SC3503E?

2SC3503E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SC3503E 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 2SC3503E?

For technical support, including 2SC3503E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SC3503E requirements.

6.How does Aetrix verify that 2SC3503E is sourced from the original manufacturer or authorized distributors?

All 2SC3503E 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 2SC3503E meets industry standards.

7.What is the process for return or replacement of 2SC3503E?

All 2SC3503E units undergo pre-shipment inspection (PSI). If there is an issue with 2SC3503E, 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 2SC3503E part is unused and in its original packaging.

Return procedure for 2SC3503E:

1.Submit a request within 90 days.

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

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