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

onsemi 2N3415_D27Z

Name: 2N3415_D27Z
Brand: onsemi
SKU: 2N3415_D27Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2N3415_D27Z

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Datasheet:: 2N3415_D27Z.pdf

Description:: TRANS NPN 25V 0.5A TO-92-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2N3415_D27Z from Fairchild Semiconductor is an NPN general-purpose bipolar junction transistor (BJT) designed for low-to-medium power amplification and switching applications, with V_CEO = 25 V, I_C = 500 mA continuous, and h_FE = 180–540 at I_C = 2.0 mA. It operates across –55°C to +150°C and is commonly used in discrete amplifier stages, relay drivers, and logic-level interface circuits.

For engineers reviewing the 2N3415_D27Z datasheet, pinout, applications, or equivalent options, key selection considerations include its TO-92 package thermal resistance (R_θJA = 200°C/W), saturation voltage (V_CE(sat) ≤ 0.3 V at I_C = 50 mA), and guaranteed DC current gain range under defined bias conditions.

Technical Context

The 2N3415_D27Z is a silicon NPN planar epitaxial transistor fabricated using Fairchild's Process 10, optimized for general-purpose linear and switching operation. Its design supports stable DC biasing with h_FE specified at V_CE = 4.5 V and I_C = 2.0 mA, and it meets standard reliability requirements for industrial ambient temperature ranges.

It exhibits defined breakdown limits-V_(BR)CEO ≥ 25 V at I_C = 10 mA, V_(BR)CBO ≥ 25 V, and V_(BR)EBO ≥ 5.0 V-with leakage currents tightly controlled (I_CBO ≤ 0.1 µA at 25°C). Thermal performance is characterized by R_θJC = 83.3°C/W and P_D = 625 mW at T_A = 25°C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	25 V - Maximum safe collector-emitter voltage before avalanche breakdown under open-base condition
I_C (continuous)	500 mA - Continuous collector current handling capacity without thermal runaway at 25°C ambient
h_FE	180–540 - DC current gain range at V_CE = 4.5 V, I_C = 2.0 mA; enables predictable bias design in Class-A amplifiers
V_CE(sat)	≤ 0.3 V - Low saturation voltage at I_C = 50 mA / I_B = 3.0 mA; minimizes conduction loss in switch mode
T_J range	–55°C to +150°C - Validated operating junction temperature span supporting industrial and automotive under-hood environments
P_D	625 mW - Total power dissipation limit at 25°C ambient; derates 5.0 mW/°C above that temperature

Pinout & Package

Package: TO-92 - Molded plastic case with 3-lead vertical mounting configuration; lead spacing 0.1 inch; compatible with wave soldering and manual prototyping.

Pin/Terminal	Circuit Role	Design Meaning
E (Emitter)	Current sink terminal	Reference node for base biasing; connects to ground or low-impedance return path in common-emitter configurations
B (Base)	Control input	Receives forward-biased current to modulate collector current; requires series resistor for current limiting in digital drive
C (Collector)	Current source terminal	Delivers amplified or switched load current; connects to supply rail or active load in amplifier topologies

Key Features

Feature	Design Value
Guaranteed h_FE range	180–540 ensures consistent DC bias point setting across production lots without individual trimming
Low V_CE(sat)	≤ 0.3 V reduces power loss and self-heating in saturated switching applications up to 50 mA load
High V_(BR)CEO	25 V supports operation in 12 V and 24 V systems with margin against transients and ripple
TO-92 mechanical compatibility	Standard footprint allows drop-in replacement in legacy designs using PN2222A, BC547, or 2N2222 variants

Applications

Audio Pre-amplifier Stage	DC Motor On/Off Control
Use Scenario: Small-signal voltage amplification in battery-powered portable audio devices with single-supply rails. IC Role / Device Role / Timing Role: NPN BJT configured in common-emitter topology to provide mid-band voltage gain (~100×) with minimal distortion. Use Value: h_FE ≥ 180 and f = 1 kHz small-signal gain stability ensure clean signal reproduction without external feedback complexity.	Use Scenario: Driving small brushed DC motors (e.g., cooling fans, actuator modules) from microcontroller GPIO pins. IC Role / Device Role / Timing Role: Switching element in grounded-emitter configuration, turning motor current on/off via base current control. Use Value: V_CE(sat) ≤ 0.3 V limits resistive loss and heat generation during sustained ON-state operation at 100–300 mA loads.
LED Driver Circuit	Logic-Level Translator
Use Scenario: Constant-current LED driving in indicator panels and status displays powered from 5 V or 3.3 V supplies. IC Role / Device Role / Timing Role: Current-controlled switch regulating LED current through emitter resistor feedback. Use Value: Tight I_CBO ≤ 0.1 µA and stable h_FE enable precise current setting without thermal drift over –40°C to +85°C.	Use Scenario: Level-shifting between 3.3 V microcontroller outputs and 5 V peripheral inputs in mixed-voltage embedded systems. IC Role / Device Role / Timing Role: Active pull-up/pull-down stage translating logic states while isolating supply domains. Use Value: V_BE(sat) = 0.6–1.3 V and low base drive requirement (< 3 mA) allow direct GPIO interfacing without additional driver ICs.

Audio Pre-amplifier Stage

DC Motor On/Off Control

Use Scenario: Small-signal voltage amplification in battery-powered portable audio devices with single-supply rails.

IC Role / Device Role / Timing Role: NPN BJT configured in common-emitter topology to provide mid-band voltage gain (~100×) with minimal distortion.

Use Value: h_FE ≥ 180 and f = 1 kHz small-signal gain stability ensure clean signal reproduction without external feedback complexity.

Use Scenario: Driving small brushed DC motors (e.g., cooling fans, actuator modules) from microcontroller GPIO pins.

IC Role / Device Role / Timing Role: Switching element in grounded-emitter configuration, turning motor current on/off via base current control.

Use Value: V_CE(sat) ≤ 0.3 V limits resistive loss and heat generation during sustained ON-state operation at 100–300 mA loads.

LED Driver Circuit

Logic-Level Translator

Use Scenario: Constant-current LED driving in indicator panels and status displays powered from 5 V or 3.3 V supplies.

IC Role / Device Role / Timing Role: Current-controlled switch regulating LED current through emitter resistor feedback.

Use Value: Tight I_CBO ≤ 0.1 µA and stable h_FE enable precise current setting without thermal drift over –40°C to +85°C.

Use Scenario: Level-shifting between 3.3 V microcontroller outputs and 5 V peripheral inputs in mixed-voltage embedded systems.

IC Role / Device Role / Timing Role: Active pull-up/pull-down stage translating logic states while isolating supply domains.

Use Value: V_BE(sat) = 0.6–1.3 V and low base drive requirement (< 3 mA) allow direct GPIO interfacing without additional driver ICs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN general-purpose amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
PN2222A	V_CEO = 40 V, I_C = 600 mA, h_FE = 100–300 - higher voltage rating but narrower gain spread	Better suited for higher-voltage switching; less gain consistency in linear amplification	Select when >25 V headroom is required or when tighter h_FE tolerance is acceptable
BC547B	V_CEO = 45 V, I_C = 100 mA, h_FE = 200–450 - lower current rating, similar gain profile	Preferred in low-power signal chains; not rated for >300 mA continuous loads	Choose for space-constrained PCBs where 100 mA max current suffices and TO-92 footprint is retained

Compared with PN2222A and BC547B, the 2N3415_D27Z offers the optimal balance of 25 V breakdown, 500 mA current capability, and wide h_FE range-making it especially suitable for cost-sensitive industrial controls where both switching robustness and analog linearity matter.

Availability

2N3415_D27Z is available at Aetrix Electronics and suitable for industrial control interfaces, discrete audio signal conditioning, and low-power relay driving requiring stable component supply and long-term manufacturing continuity.

Supply support for 2N3415_D27Z 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 components before its acquisition by ON Semiconductor in 2016.

The 2N3415_D27Z belongs to Fairchild's legacy general-purpose BJT product line, engineered for broad utility in analog amplification, digital switching, and interface circuitry across consumer, industrial, and automotive auxiliary systems.

FAQ

What is the maximum collector current rating for the 2N3415_D27Z?

The 2N3415_D27Z has a continuous collector current rating of 500 mA at T_A = 25°C. This value decreases with rising ambient temperature due to its 5.0 mW/°C power derating slope. For pulsed operation, consult Fairchild's original datasheet for duty cycle and pulse width limitations, as the device is validated for steady-state conditions only.

Is the 2N3415_D27Z pin-compatible with the 2N2222?

No-the 2N3415_D27Z uses the standard TO-92 pinout (E-B-C), same as the 2N2222, but its electrical characteristics differ significantly: the 2N3415_D27Z has lower V_CEO (25 V vs. 40 V) and higher minimum h_FE (180 vs. 35–75). Direct substitution may require revalidation of bias networks and thermal margins in existing 2N2222 designs.

What is the typical V_BE(sat) of the 2N3415_D27Z under switching conditions?

The 2N3415_D27Z exhibits a V_BE(sat) of 0.6–1.3 V when operated at I_C = 50 mA and I_B = 3.0 mA. This range reflects process variation across production lots and ensures reliable turn-on with standard TTL or CMOS logic-level drive without external level-shifting circuitry.

Does the 2N3415_D27Z meet RoHS compliance?

Yes-the 2N3415_D27Z manufactured under Fairchild's Rev B specification (2001) predates mandatory RoHS enforcement, but current Aetrix-supplied units comply with RoHS Directive 2011/65/EU and are lead-free, halogen-free, and fully traceable per EU REACH Annex XIV requirements.

Can the 2N3415_D27Z be used in linear amplifier configurations?

Yes-the 2N3415_D27Z is explicitly characterized for linear operation, with h_FE tested at V_CE = 4.5 V and I_C = 2.0 mA, and small-signal current gain (h_fe) specified at 1 kHz. Its low noise and stable gain make it suitable for pre-amplifier stages, though thermal stability must be ensured via appropriate heatsinking or bias compensation in Class-A designs.

2N3415_D27Z Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 500 mA

Voltage - Collector Emitter Breakdown (Max):: 25 V

Vce Saturation (Max) @ Ib, Ic:: 300mV @ 3mA, 50mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 180 @ 2mA, 4.5V

Power - Max:: 625 mW

Frequency - Transition:: -

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

2N3415_D27Z FAQ

1.How can I place an order for 2N3415_D27Z through Aetrix?

Please submit a Request for Quotation (RFQ) for 2N3415_D27Z 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 2N3415_D27Z reliable?

The price and inventory of 2N3415_D27Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2N3415_D27Z is usually 5 days.

3.What payment methods are accepted for 2N3415_D27Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2N3415_D27Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2N3415_D27Z?

2N3415_D27Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2N3415_D27Z 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 2N3415_D27Z?

For technical support, including 2N3415_D27Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2N3415_D27Z requirements.

6.How does Aetrix verify that 2N3415_D27Z is sourced from the original manufacturer or authorized distributors?

All 2N3415_D27Z 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 2N3415_D27Z meets industry standards.

7.What is the process for return or replacement of 2N3415_D27Z?

All 2N3415_D27Z units undergo pre-shipment inspection (PSI). If there is an issue with 2N3415_D27Z, 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 2N3415_D27Z part is unused and in its original packaging.

Return procedure for 2N3415_D27Z:

1.Submit a request within 90 days.

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

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