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

onsemi 2N5415

Name: 2N5415
Brand: onsemi
SKU: 2N5415
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2N5415

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-39

Datasheet:: 2N5415.pdf

Description:: TRANS PNP 200V 0.1A TO-39

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2N5415 from Fairchild Semiconductor is a PNP bipolar junction transistor designed for high-voltage amplifier and switching applications, with V_CEO = 200 V, I_C = 100 mA continuous, and h_FE = 30–150 at I_C = 50 mA. It operates across –55°C to +150°C and is commonly used in flyback driver stages and HV signal conditioning circuits.

For engineers reviewing the 2N5415 datasheet, pinout, applications, or equivalent options, key selection considerations include its PNP polarity, 200 V breakdown rating, TO-226 (TO-92) package, thermal resistance of 50°C/W (junction-to-ambient), and suitability for linear amplification and saturated switching in high-voltage analog interfaces.

Technical Context

The 2N5415 is a silicon PNP BJT fabricated using Fairchild's Process 76, optimized for high-voltage operation up to 200 V with low leakage (ICBO ≤ 50 µA at VCB = 175 V). Its DC current gain spans 30–150 under standard bias conditions (VCE = 10 V, IC = 50 mA), supporting both linear amplification and switching modes.

Small-signal parameters include h_fe ≥ 3.0 at 5 MHz and input resistance h_ie ≈ 300 Ω at IC = 5 mA, indicating moderate frequency response and low-impedance base drive requirements. Output capacitance Cob = 15 pF at VCB = 10 V enables stable operation in <10 MHz switching topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	200 V - supports collector-emitter blocking in HV power supply feedback and relay drivers
I_C (cont.)	100 mA - enables direct driving of medium-power loads without external buffering
h_FE	30–150 - provides predictable DC gain for biasing in Class-A amplifiers and switch saturation control
V_CE(sat)	2.5 V max at IC = 50 mA, IB = 5 mA - limits conduction loss in switching applications
T_J range	–55°C to +150°C - ensures reliability in industrial and automotive under-hood environments
R_θJA	50°C/W - defines thermal derating slope for PCB-mounted operation without heatsink

Pinout & Package

2N5415 is housed in a TO-226 (TO-92) plastic package with standard through-hole lead configuration. The device features three terminals: Collector (C), Base (B), and Emitter (E), arranged in a linear C–B–E sequence when viewed with flat side facing outward and leads pointing downward.

Pin/Terminal	Circuit Role	Design Meaning
Collector (C)	Current sink node	Connected to high-side HV rail; must withstand 200 V reverse bias during off-state
Base (B)	Control input	Receives forward-biased current to enable conduction; requires ~5 mA for full saturation
Emitter (E)	Reference terminal	Typically tied to system ground or positive rail depending on PNP topology; carries full load current

Key Features

Feature	Design Value
High V_CEO rating	200 V - enables use in 175 V DC bus monitoring and CRT deflection circuits
Low ICBO leakage	≤50 µA at VCB = 175 V - preserves gain stability in high-impedance bias networks
Controlled h_FE spread	30–150 - simplifies production binning and reduces need for emitter degeneration in fixed-gain stages
Thermal robustness	R_θJA = 50°C/W - allows 1 W dissipation at ambient ≤ 75°C with standard PCB layout

Applications

Switch-Mode Power Supply Feedback	High-Voltage Relay Driver
Use Scenario: Isolating error amplifier output from optocoupler input in offline AC/DC converters operating at 100–400 V DC bus. IC Role / Device Role / Timing Role: PNP current sink that translates TL431 reference voltage into optocoupler LED drive current. Use Value: 200 V V_CEO prevents breakdown during transient overvoltage events on primary-side feedback lines.	Use Scenario: Driving coil of 120 VAC reed relays or solid-state relays in industrial PLC I/O modules. IC Role / Device Role / Timing Role: High-voltage interface transistor switching relay coil current up to 100 mA. Use Value: Low V_CE(sat) (≤2.5 V) minimizes power loss and self-heating during sustained on-state operation.
Flyback Converter Snubber Clamp	Analog Signal Level Shifting
Use Scenario: Clamping voltage spikes across transformer primary windings in discontinuous-conduction-mode flyback converters. IC Role / Device Role / Timing Role: Fast-turn-off PNP clamp transistor activated by RC network to absorb leakage inductance energy. Use Value: 15 pF Cob and 75 pF Cib ensure minimal capacitive loading on snubber timing nodes.	Use Scenario: Translating ±10 V op-amp outputs to 0–5 V logic-compatible levels in data acquisition front-ends. IC Role / Device Role / Timing Role: Emitter-follower configured PNP level shifter with grounded emitter and resistive base bias. Use Value: h_FE ≥ 30 guarantees sufficient current drive into 10 kΩ load while maintaining linearity.

Switch-Mode Power Supply Feedback

High-Voltage Relay Driver

Use Scenario: Isolating error amplifier output from optocoupler input in offline AC/DC converters operating at 100–400 V DC bus.

IC Role / Device Role / Timing Role: PNP current sink that translates TL431 reference voltage into optocoupler LED drive current.

Use Value: 200 V V_CEO prevents breakdown during transient overvoltage events on primary-side feedback lines.

Use Scenario: Driving coil of 120 VAC reed relays or solid-state relays in industrial PLC I/O modules.

IC Role / Device Role / Timing Role: High-voltage interface transistor switching relay coil current up to 100 mA.

Use Value: Low V_CE(sat) (≤2.5 V) minimizes power loss and self-heating during sustained on-state operation.

Flyback Converter Snubber Clamp

Analog Signal Level Shifting

Use Scenario: Clamping voltage spikes across transformer primary windings in discontinuous-conduction-mode flyback converters.

IC Role / Device Role / Timing Role: Fast-turn-off PNP clamp transistor activated by RC network to absorb leakage inductance energy.

Use Value: 15 pF Cob and 75 pF Cib ensure minimal capacitive loading on snubber timing nodes.

Use Scenario: Translating ±10 V op-amp outputs to 0–5 V logic-compatible levels in data acquisition front-ends.

IC Role / Device Role / Timing Role: Emitter-follower configured PNP level shifter with grounded emitter and resistive base bias.

Use Value: h_FE ≥ 30 guarantees sufficient current drive into 10 kΩ load while maintaining linearity.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP high-voltage amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MPSA92	Same V_CEO = 300 V, higher h_FE (min 25), TO-92 package	Higher breakdown margin suits 230 VAC mains-connected circuits	Preferred where >200 V headroom is required; otherwise functionally interchangeable
2N5551	PNP counterpart to NPN 2N5551; V_CEO = 160 V, lower voltage rating	Limited to ≤160 V applications; not suitable for 200 V designs	Select only if system voltage remains below 160 V; verify safe operating area derating

Compared with 2N5415, MPSA92 offers greater voltage margin and broader gain consistency, while 2N5551 trades voltage capability for tighter h_FE distribution-making 2N5415 the optimal balance of 200 V rating, thermal performance, and proven reliability in legacy HV analog designs.

Availability

2N5415 is available at Aetrix Electronics and suitable for switch-mode power supply feedback, high-voltage relay driver, and flyback converter snubber clamp applications requiring stable component supply and long-term industrial availability.

Supply support for 2N5415 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

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete devices before its acquisition by ON Semiconductor in 2016.

The 2N5415 belongs to Fairchild's legacy high-voltage PNP transistor family, engineered for robust performance in analog amplification, HV switching, and industrial interface circuits where reliability under voltage stress is critical.

FAQ

What is the maximum collector-emitter voltage rating for the 2N5415?

The 2N5415 has a maximum collector-emitter voltage (V_CEO) rating of 200 V, verified per Absolute Maximum Ratings in the official Fairchild datasheet. This rating applies at T_A = 25°C with no derating, and defines the upper limit for safe DC blocking in amplifier or switching configurations. Exceeding this voltage risks avalanche breakdown and permanent device failure.

Is the 2N5415 a PNP or NPN transistor?

The 2N5415 is a PNP bipolar junction transistor, confirmed by its absolute maximum ratings (V_CEO, V_CBO both specified as negative-polarity blocking voltages), electrical characteristics (e.g., V_BE(on) = 1.5 V), and functional description as a "PNP High Voltage Amplifier" in the Fairchild datasheet. Its current flow direction and biasing requirements follow standard PNP conventions.

What package type does the 2N5415 use?

The 2N5415 uses a TO-226 (also known as TO-92) plastic through-hole package, as explicitly shown in the mechanical drawing and pin diagram of the Fairchild datasheet. The lead arrangement is Collector–Base–Emitter (C–B–E) when viewed with the flat side facing forward and leads pointing downward.

Can the 2N5415 be used in switching applications?

Yes, the 2N5415 is suitable for switching applications, evidenced by its specified V_CE(sat) = 2.5 V max at I_C = 50 mA and I_B = 5 mA, and its Safe Operating Area (SOA) rating of 100 mA at V_CE = 100 V for t = 100 ms. These parameters confirm capability for saturated on/off operation in medium-speed, medium-voltage switching circuits.

How does the 2N5415 compare to the MPSA92?

The 2N5415 and MPSA92 share identical application scope as high-voltage PNP transistors but differ in key specs: MPSA92 has V_CEO = 300 V (vs. 200 V for 2N5415) and slightly higher minimum h_FE (25 vs. 30). Both use TO-92 packages and are sourced from Fairchild Process 76. The 2N5415 remains preferred where 200 V margin suffices and legacy design compatibility is prioritized.

2N5415 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-39

Packaging:: -

Product Status:: Obsolete

Transistor Type:: PNP

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

Voltage - Collector Emitter Breakdown (Max):: 200 V

Vce Saturation (Max) @ Ib, Ic:: 2.5V @ 5mA, 50mA

Current - Collector Cutoff (Max):: 50µA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 30 @ 50mA, 10V

Power - Max:: 1 W

Frequency - Transition:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-39

2N5415 FAQ

1.How can I place an order for 2N5415 through Aetrix?

Please submit a Request for Quotation (RFQ) for 2N5415 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 2N5415 reliable?

The price and inventory of 2N5415 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2N5415 is usually 5 days.

3.What payment methods are accepted for 2N5415?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2N5415 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2N5415?

2N5415 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2N5415 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 2N5415?

For technical support, including 2N5415 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2N5415 requirements.

6.How does Aetrix verify that 2N5415 is sourced from the original manufacturer or authorized distributors?

All 2N5415 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 2N5415 meets industry standards.

7.What is the process for return or replacement of 2N5415?

All 2N5415 units undergo pre-shipment inspection (PSI). If there is an issue with 2N5415, 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 2N5415 part is unused and in its original packaging.

Return procedure for 2N5415:

1.Submit a request within 90 days.

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

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