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

onsemi 2SC6043-AE

Name: 2SC6043-AE
Brand: onsemi
SKU: 2SC6043-AE
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SC6043-AE

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-226-3, TO-92-3 Long Body, Formed Leads

Datasheet:: 2SC6043-AE.pdf

Description:: TRANS NPN 50V 2A TO92

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2SC6043-AE from onsemi is a low-saturation-voltage NPN bipolar junction transistor (BJT) designed for switching and power amplification in discrete driver stages. It features V_CEO = 50 V, I_C = 2 A continuous, V_CE(sat) = 150–300 mV at I_C = 1 A / I_B = 50 mA, f_T = 420 MHz, and operates up to T_j = 150 °C - used in relay drivers, lamp drivers, and linear voltage regulators.

For engineers reviewing the 2SC6043-AE datasheet, pinout, applications, or equivalent options, key selection criteria include saturation voltage tolerance under 1 A load, TO-92-compatible thermal derating, MBIT process reliability, and compatibility with 5 V/12 V control logic interfaces in industrial driver circuits.

Technical Context

The 2SC6043-AE employs onsemi's MBIT (Modified Base Island Technology) process to achieve low V_CE(sat) and high-speed switching performance. Its h_FE ranges from 40 (at I_C = 1.5 A) to 560 (at I_C = 100 mA), supporting both medium-current switching and small-signal amplification roles within the same family.

With t_on = 35 ns, t_stg = 330 ns, and t_f = 40 ns, the device delivers fast turn-off characteristics critical for pulse-width modulated (PWM) lamp and relay control. Its Cob = 9 pF and f_T = 420 MHz confirm suitability for high-frequency switching below 10 MHz without significant gain roll-off.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50 V - maximum safe collector-emitter voltage with base open; defines upper limit for DC supply rails in relay/lamp drivers
I_C	2 A continuous - supports sustained 12 V/24 V solenoid or incandescent lamp loads without heatsinking below 50 °C ambient
V_CE(sat)	150–300 mV @ I_C=1 A, I_B=50 mA - enables <150 mW conduction loss per switch, reducing thermal stress in compact enclosures
f_T	420 MHz - ensures stable small-signal gain up to ~10 MHz, suitable for PWM carrier frequencies and fast digital interface buffering
h_FE	40–560 - wide DC current gain range allows flexible base drive design: low I_B for efficiency or high I_B for speed assurance
t_stg	330 ns - dominant storage time limits minimum off-time in high-duty-cycle switching; requires active base pull-down for optimal recovery

Pinout & Package

2SC6043-AE is housed in the MP package - identical to JEITA SC-51 and JEDEC TO-92 variant TO-226AE - a through-hole, 3-pin, 1 W-rated plastic case with 0.578 g mass and standard lead spacing.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Reference node for current flow; connects to ground or low-side return path in common-emitter switches
2	Collector	High-current output terminal; ties to load (e.g., relay coil or lamp anode) and supply rail
3	Base	Control input; driven by microcontroller GPIO or logic buffer to enable/disable conduction with ~50 mA required for full saturation

Key Features

Feature	Design Value
MBIT process technology	Enables consistent low V_CE(sat) and tight h_FE distribution across production lots, improving batch-to-batch driver stage predictability
Low V_CE(sat)	Reduces power dissipation during on-state operation, allowing higher duty cycles in thermally constrained PCB layouts
High-speed switching	Sub-40 ns turn-on and 40 ns fall time support PWM frequencies up to 2 MHz with minimal dead-time overhead
TO-92 mechanical compatibility	Enables drop-in replacement in legacy designs using SC-51/TO-226AE footprints without board rework

Applications

Relay Driver Stage	Lamp Driver Circuit
Use Scenario: Driving 12 V/24 V electromagnetic relays in PLC I/O modules and industrial control panels. IC Role / Device Role / Timing Role: NPN switch operating in saturation mode to sink relay coil current (typically 40–150 mA) with logic-level base drive. Use Value: Low V_CE(sat) minimizes coil voltage drop, ensuring reliable relay pull-in even at marginal supply voltages.	Use Scenario: Controlling incandescent or halogen indicator lamps in test equipment and panel meters. IC Role / Device Role / Timing Role: Medium-current switch handling peak currents up to 2 A during cold-filament inrush. Use Value: High I_CP = 4 A rating accommodates 10× cold-filament surge without secondary protection.
Voltage Regulator Pass Element	Electrical Equipment Interface
Use Scenario: Discrete pass transistor in linear 5 V/3.3 V regulators for analog sensor signal conditioning subcircuits. IC Role / Device Role / Timing Role: Series-pass element biased in active region to regulate output voltage via feedback loop. Use Value: h_FE ≥ 40 at 1.5 A ensures stable loop gain and transient response under full-load conditions.	Use Scenario: Isolated logic-level translation between microcontroller outputs and 24 V field-side actuators in factory automation gear. IC Role / Device Role / Timing Role: Level-shifting switch translating 3.3 V/5 V GPIO to 24 V sink capability. Use Value: V_CEO = 50 V provides 26 V headroom above 24 V nominal, accommodating line transients per IEC 61000-4-4.

Relay Driver Stage

Lamp Driver Circuit

Use Scenario: Driving 12 V/24 V electromagnetic relays in PLC I/O modules and industrial control panels.

IC Role / Device Role / Timing Role: NPN switch operating in saturation mode to sink relay coil current (typically 40–150 mA) with logic-level base drive.

Use Value: Low V_CE(sat) minimizes coil voltage drop, ensuring reliable relay pull-in even at marginal supply voltages.

Use Scenario: Controlling incandescent or halogen indicator lamps in test equipment and panel meters.

IC Role / Device Role / Timing Role: Medium-current switch handling peak currents up to 2 A during cold-filament inrush.

Use Value: High I_CP = 4 A rating accommodates 10× cold-filament surge without secondary protection.

Voltage Regulator Pass Element

Electrical Equipment Interface

Use Scenario: Discrete pass transistor in linear 5 V/3.3 V regulators for analog sensor signal conditioning subcircuits.

IC Role / Device Role / Timing Role: Series-pass element biased in active region to regulate output voltage via feedback loop.

Use Value: h_FE ≥ 40 at 1.5 A ensures stable loop gain and transient response under full-load conditions.

Use Scenario: Isolated logic-level translation between microcontroller outputs and 24 V field-side actuators in factory automation gear.

IC Role / Device Role / Timing Role: Level-shifting switch translating 3.3 V/5 V GPIO to 24 V sink capability.

Use Value: V_CEO = 50 V provides 26 V headroom above 24 V nominal, accommodating line transients per IEC 61000-4-4.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
2SC4116-AP	V_CEO = 50 V, I_C = 1.5 A, V_CE(sat) = 200–400 mV - lower current rating and higher saturation voltage	Suitable only for ≤1.2 A loads; less margin for lamp inrush or relay coil aging	Select when footprint compatibility is required but peak current demand is ≤1.2 A and thermal budget allows +50 mV V_CE(sat)
MJD2955G	V_CEO = 60 V, I_C = 10 A, TO-220 package - higher power, surface-mount, no direct pinout match	Requires PCB redesign; suited for high-power, heatsinked applications beyond TO-92 thermal limits	Choose for >2 A continuous loads or forced-air-cooled systems where TO-220 layout is acceptable

Compared with 2SC4116-AP and MJD2955G, the 2SC6043-AE uniquely balances 2 A capability, TO-92 mountability, and sub-300 mV saturation in a single cost-effective discrete package - making it optimal for space-constrained, medium-power industrial driver stages without thermal derating penalties.

Availability

2SC6043-AE is available at Aetrix Electronics and suitable for relay drivers, lamp drivers, and linear voltage regulators requiring stable component supply, long-term obsolescence management, and traceable lot-level compliance documentation.

Supply support for 2SC6043-AE 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.

The 2SC6043-AE belongs to onsemi's general-purpose bipolar transistor product line, engineered specifically for robust, low-cost discrete switching in industrial control, power management, and interface circuitry.

FAQ

What is the maximum continuous collector current rating for the 2SC6043-AE?

The 2SC6043-AE has a maximum continuous collector current (I_C) rating of 2 A at T_a = 25 °C. Derating is required above 25 °C ambient - approximately 16 mA/°C reduction - due to its 1 W total power dissipation limit and TO-92 thermal resistance. Always verify junction temperature rise under actual operating conditions before finalizing the 2SC6043-AE in high-duty-cycle applications.

Does the 2SC6043-AE support high-speed switching in PWM circuits?

Yes, the 2SC6043-AE supports high-speed switching with t_on = 35 ns, t_stg = 330 ns, and t_f = 40 ns. Its 420 MHz f_T and low Cob = 9 pF allow clean transitions up to ~2 MHz PWM frequencies. For optimal performance, use active base pull-down to minimize storage time - a key factor in the 2SC6043-AE's switching behavior.

What package type does the 2SC6043-AE use, and is it compatible with standard TO-92 footprints?

The 2SC6043-AE uses the MP package, which conforms to JEITA SC-51 and JEDEC TO-226AE outlines - mechanically identical to standard TO-92. Pin 1 = Emitter, Pin 2 = Collector, Pin 3 = Base. Its 0.578 g mass and 8.5 mm height align with industry TO-92 tolerances, enabling direct substitution in existing TO-92 layouts without footprint modification.

How does the MBIT process benefit the 2SC6043-AE in industrial applications?

The MBIT (Modified Base Island Technology) process used in the 2SC6043-AE improves base-emitter uniformity and reduces series resistance, resulting in tighter V_CE(sat) distribution (150–300 mV) and stable h_FE across temperature and current. This enhances reliability in unregulated industrial environments where the 2SC6043-AE operates in relay and lamp driver roles subject to thermal cycling and voltage variation.

Can the 2SC6043-AE replace older 2SC1815 or 2N2222 variants in existing designs?

The 2SC6043-AE offers higher I_C (2 A vs. 0.1–0.5 A), lower V_CE(sat), and faster switching than 2SC1815 or 2N2222, but pinout differs: 2SC6043-AE is E-C-B (Pin 1–2–3), while 2N2222 is E-B-C. Direct replacement requires PCB modification. Use the 2SC6043-AE only when upgraded current handling and speed are needed - and verify base drive strength matches its 50 mA saturation requirement.

2SC6043-AE Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-226-3, TO-92-3 Long Body, Formed Leads

Packaging:: Bulk

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 2 A

Voltage - Collector Emitter Breakdown (Max):: 50 V

Vce Saturation (Max) @ Ib, Ic:: 300mV @ 50mA, 1A

Current - Collector Cutoff (Max):: 1µA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 200 @ 100mA, 2V

Power - Max:: 1 W

Frequency - Transition:: 420MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92 (TO-226)

2SC6043-AE FAQ

1.How can I place an order for 2SC6043-AE through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SC6043-AE 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 2SC6043-AE reliable?

The price and inventory of 2SC6043-AE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SC6043-AE is usually 5 days.

3.What payment methods are accepted for 2SC6043-AE?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SC6043-AE transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SC6043-AE?

2SC6043-AE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SC6043-AE 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 2SC6043-AE?

For technical support, including 2SC6043-AE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SC6043-AE requirements.

6.How does Aetrix verify that 2SC6043-AE is sourced from the original manufacturer or authorized distributors?

All 2SC6043-AE 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 2SC6043-AE meets industry standards.

7.What is the process for return or replacement of 2SC6043-AE?

All 2SC6043-AE units undergo pre-shipment inspection (PSI). If there is an issue with 2SC6043-AE, 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 2SC6043-AE part is unused and in its original packaging.

Return procedure for 2SC6043-AE:

1.Submit a request within 90 days.

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

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