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

onsemi 50C02SS-TL-E

Name: 50C02SS-TL-E
Brand: onsemi
SKU: 50C02SS-TL-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 50C02SS-TL-E

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: SC-81

Datasheet:: 50C02SS-TL-E.pdf

Description:: TRANS NPN 50V 0.4A 3-SSFP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

50C02SS-TL-E from onsemi is a low-V_CE(sat) NPN bipolar transistor in SSFP (SC-81) package, rated for 50 V V_CEO, 400 mA I_C, and 175 mΩ typical R_CE(sat) at I_C = 0.5 A / I_B = 50 mA. It serves as a high-speed switching element in small motor drives and muting circuits.

For engineers reviewing the 50C02SS-TL-E datasheet, pinout, applications, or equivalent options, key selection criteria include its ultrasmall SSFP footprint, 500 MHz f_T, low 100 mV V_CE(sat) at 100 mA/10 mA drive, 2.8 pF C_ob, and 340 ns storage time in switching designs.

Technical Context

This NPN transistor employs epitaxial planar construction optimized for low saturation voltage and fast switching. Its 500 MHz gain-bandwidth product supports high-frequency amplification and pulse switching up to tens of MHz, while the 2.8 pF output capacitance enables clean signal transitions in digital interface and driver stages.

Designed for operation with I_C ≤ 400 mA DC and 800 mA pulsed, it delivers stable h_FE of 300–800 at V_CE = 2 V / I_C = 10 mA and maintains V_(BR)CEO = 50 V with I_C = 1 mA and open base - confirming robust breakdown margin in 24 V rail applications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50 V - Supports reliable switching in 24 V industrial control and audio muting circuits without avalanche risk.
I_C	400 mA - Sufficient current drive for small DC motors, LED arrays, and relay coils in compact embedded systems.
V_CE(sat)	100 mV max at I_C=100 mA/I_B=10 mA - Minimizes conduction loss and self-heating in battery-powered or thermally constrained PCBs.
f_T	500 MHz - Enables use in RF predriver stages and high-speed logic interface buffering up to ~100 MHz square waves.
C_ob	2.8 pF at V_CB=10 V - Reduces Miller effect and improves turn-off speed in switching regulators and PWM drivers.
h_FE	300–800 at V_CE=2 V/I_C=10 mA - Provides predictable current gain for analog amplification and linear biasing networks.
t_stg	340 ns - Dominates total switching delay in saturated-switch applications; requires careful base drive design to minimize dead time.

Pinout & Package

Package: SSFP (SC-81), ultrasmall surface-mount plastic package measuring 1.4 × 1.4 × 0.45 mm, mass 0.0018 g, designed for high-density PCB layouts and automated assembly.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control input requiring ~10 mA drive for full saturation; connected via current-limiting resistor in switch mode.
2	Emitter	Common reference node; tied to ground or low-side return path; must be routed with low inductance for fast switching.
3	Collector	Output terminal carrying load current; connects to switched V_CC rail or motor winding; requires thermal relief on copper pour.

Key Features

Feature	Design Value
Low V_CE(sat)	100 mV max ensures <10 mW conduction loss at 100 mA, critical for thermal management in sealed enclosures.
Ultrasmall SSFP footprint	1.4 × 1.4 mm outline enables placement in space-constrained IoT sensors and wearable device PCBs.
High f_T	500 MHz allows stable small-signal amplification up to UHF bands and fast edge response in pulse generators.
Low C_ob	2.8 pF minimizes capacitive loading on driving ICs and reduces switching energy loss in high-frequency PWM.
Robust V_(BR)CEO	50 V rating provides 2× margin over 24 V nominal rails, enhancing reliability in automotive body electronics.

Applications

Audio Muting Circuit	Small DC Motor Driver
Use Scenario: Silent power-up/power-down sequencing in portable speakers and headset amplifiers. IC Role / Device Role / Timing Role: NPN switch enabling/disabling audio path between amplifier output and speaker terminals. Use Value: 100 mV V_CE(sat) prevents audible pop/click by minimizing voltage offset during transition; 340 ns t_stg ensures sub-millisecond mute timing.	Use Scenario: Bidirectional control of 3–12 V brushed micro-motors in medical pumps and precision actuators. IC Role / Device Role / Timing Role: Low-side switch in H-bridge half-leg or single-direction drive stage. Use Value: 400 mA I_C rating supports 100–300 mA motor stall currents; 175 mΩ R_CE(sat) limits heat rise to <15°C/W on standard FR4.
Low-Frequency Amplifier	Signal-Level Switching
Use Scenario: Pre-amplification of sensor signals (e.g., thermistor, potentiometer) in industrial monitoring nodes. IC Role / Device Role / Timing Role: Common-emitter amplifier with fixed bias network for DC-coupled gain staging. Use Value: h_FE = 300–800 ensures stable 20–50× voltage gain across temperature; low 100 nA I_CBO preserves input impedance >10 MΩ.	Use Scenario: Enabling/disabling logic-level signals (e.g., reset, enable, interrupt) between MCU and peripheral ICs. IC Role / Device Role / Timing Role: Digital buffer/inverter with rail-to-rail output swing and fast edge control. Use Value: 30 ns t_on + 55 ns t_f supports clean 10 MHz clock gating; low C_ob avoids signal crosstalk in dense routing.

Audio Muting Circuit

Small DC Motor Driver

Use Scenario: Silent power-up/power-down sequencing in portable speakers and headset amplifiers.

IC Role / Device Role / Timing Role: NPN switch enabling/disabling audio path between amplifier output and speaker terminals.

Use Value: 100 mV V_CE(sat) prevents audible pop/click by minimizing voltage offset during transition; 340 ns t_stg ensures sub-millisecond mute timing.

Use Scenario: Bidirectional control of 3–12 V brushed micro-motors in medical pumps and precision actuators.

IC Role / Device Role / Timing Role: Low-side switch in H-bridge half-leg or single-direction drive stage.

Use Value: 400 mA I_C rating supports 100–300 mA motor stall currents; 175 mΩ R_CE(sat) limits heat rise to <15°C/W on standard FR4.

Low-Frequency Amplifier

Signal-Level Switching

Use Scenario: Pre-amplification of sensor signals (e.g., thermistor, potentiometer) in industrial monitoring nodes.

IC Role / Device Role / Timing Role: Common-emitter amplifier with fixed bias network for DC-coupled gain staging.

Use Value: h_FE = 300–800 ensures stable 20–50× voltage gain across temperature; low 100 nA I_CBO preserves input impedance >10 MΩ.

Use Scenario: Enabling/disabling logic-level signals (e.g., reset, enable, interrupt) between MCU and peripheral ICs.

IC Role / Device Role / Timing Role: Digital buffer/inverter with rail-to-rail output swing and fast edge control.

Use Value: 30 ns t_on + 55 ns t_f supports clean 10 MHz clock gating; low C_ob avoids signal crosstalk in dense routing.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT3904LT1G	V_CEO = 40 V, V_CE(sat) = 300 mV @ 10 mA/1 mA, f_T = 300 MHz, SC-70 package	Lower voltage rating and higher saturation voltage limit use in 24 V systems with tight loss budgets	Select when cost sensitivity outweighs V_CE(sat) and f_T requirements; verify layout compatibility with larger SC-70 footprint
DXT75100Q-7	V_CEO = 50 V, V_CE(sat) = 90 mV @ 500 mA/50 mA, SOT-23 package, higher P_D = 310 mW	Larger SOT-23 footprint and higher power dissipation support heavier loads but require more board area	Prefer for higher-current motor drives (>300 mA) where thermal headroom is critical; not drop-in due to different pinout (1=E, 2=B, 3=C)

Compared with MMBT3904LT1G, the 50C02SS-TL-E offers 2.5× lower V_CE(sat) and 1.7× higher f_T, improving efficiency and bandwidth; versus DXT75100Q-7, it uses a smaller SSFP package but trades 10 mV lower V_CE(sat) for reduced thermal capacity and different pin assignment.

Availability

50C02SS-TL-E is available at Aetrix Electronics and suitable for audio muting circuits, small DC motor drivers, low-frequency amplifiers, and signal-level switching applications requiring stable component supply and Pb-free compliance.

Supply support for 50C02SS-TL-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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The 50C02SS-TL-E belongs to onsemi's general-purpose bipolar transistor product line, engineered specifically for space-constrained, high-efficiency switching and amplification in portable and embedded systems.

FAQ

What is the maximum continuous collector current rating for the 50C02SS-TL-E?

The 50C02SS-TL-E has a maximum continuous collector current (I_C) rating of 400 mA at T_a = 25°C when mounted on a standard glass-epoxy board (20 × 30 × 1.6 mm). Derating applies above 25°C ambient per the PC–Ta curve; at 75°C, usable I_C drops to approximately 250 mA to maintain junction temperature below 150°C. This rating is confirmed in the Absolute Maximum Ratings table of the official 50C02SS-TL-E datasheet.

Does the 50C02SS-TL-E support high-speed switching applications?

Yes, the 50C02SS-TL-E supports high-speed switching with documented t_on = 30 ns, t_stg = 340 ns, and t_f = 55 ns under specified test conditions (V_CC = 25 V, I_C = 200 mA, I_B1/I_B2 = ±10 mA). Its 500 MHz f_T and 2.8 pF C_ob further enable clean edge transitions in PWM and digital interface circuits up to ~10 MHz. These values are measured per the switching time test circuit shown in the 50C02SS-TL-E datasheet.

What does the "-TL-E" suffix indicate in 50C02SS-TL-E?

The "-TL-E" suffix in 50C02SS-TL-E denotes tape-and-reel packaging (TL) and Pb-free, RoHS-compliant construction (E). The part ships in embossed plastic tape with 8,000 units per reel, optimized for automated SMT placement. "E" confirms compliance with JEDEC J-STD-609A Class 2a marking and absence of lead, cadmium, mercury, hexavalent chromium, PBB, and PBDE per EU RoHS Directive 2011/65/EU - verified in the 50C02SS-TL-E ordering information section.

How is the pinout configured for the 50C02SS-TL-E in SSFP package?

The 50C02SS-TL-E uses a standardized SSFP (SC-81) pinout: Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector. This configuration is explicitly shown in the "Electrical Connection" diagram and "Outline Drawing" of the 50C02SS-TL-E datasheet (page No.7519-2/7), and matches JEITA ED-7100A and JEDEC TO-236AB outlines. No alternate pin assignments exist for this variant.

What is the typical collector-to-emitter saturation resistance (R_CE(sat)) of the 50C02SS-TL-E?

The typical collector-to-emitter saturation resistance (R_CE(sat)) of the 50C02SS-TL-E is 175 mΩ, measured at I_C = 0.5 A and I_B = 50 mA. This value is listed under "Features" and confirmed in the "Electrical Characteristics" table as derived from V_CE(sat) = 100 mV max at I_C = 100 mA / I_B = 10 mA, scaling consistently with the device's low-saturation design intent. It reflects actual on-state conduction loss under practical drive conditions.

50C02SS-TL-E Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: SC-81

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 400 mA

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

Vce Saturation (Max) @ Ib, Ic:: 100mV @ 10mA, 100mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 300 @ 10mA, 2V

Power - Max:: 200 mW

Frequency - Transition:: 500MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 3-SSFP

50C02SS-TL-E FAQ

1.How can I place an order for 50C02SS-TL-E through Aetrix?

Please submit a Request for Quotation (RFQ) for 50C02SS-TL-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 50C02SS-TL-E reliable?

The price and inventory of 50C02SS-TL-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 50C02SS-TL-E is usually 5 days.

3.What payment methods are accepted for 50C02SS-TL-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 50C02SS-TL-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 50C02SS-TL-E?

50C02SS-TL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 50C02SS-TL-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 50C02SS-TL-E?

For technical support, including 50C02SS-TL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 50C02SS-TL-E requirements.

6.How does Aetrix verify that 50C02SS-TL-E is sourced from the original manufacturer or authorized distributors?

All 50C02SS-TL-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 50C02SS-TL-E meets industry standards.

7.What is the process for return or replacement of 50C02SS-TL-E?

All 50C02SS-TL-E units undergo pre-shipment inspection (PSI). If there is an issue with 50C02SS-TL-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 50C02SS-TL-E part is unused and in its original packaging.

Return procedure for 50C02SS-TL-E:

1.Submit a request within 90 days.

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

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