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

onsemi 2N4402_S00Z

Name: 2N4402_S00Z
Brand: onsemi
SKU: 2N4402_S00Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2N4402_S00Z

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: 2N4402_S00Z.pdf

Description:: TRANS PNP 40V 0.6A TO-92-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2N4402_S00Z from Fairchild Semiconductor is a PNP bipolar junction transistor designed for general-purpose amplification and switching in low-to-medium power circuits, with 40 V V_CEO, 600 mA continuous collector current, and TO-92 package - used in discrete logic interfaces, relay drivers, and signal-level amplification stages.

For engineers reviewing the 2N4402_S00Z datasheet, pinout, applications, or equivalent options, key selection criteria include V_CEO/V_CBO rating symmetry, h_FE variation across I_C (30–150), saturation voltage at 500 mA, thermal resistance (R_θJA = 200 °C/W), and TO-92 mechanical compatibility.

Technical Context

The 2N4402_S00Z operates as a standard PNP BJT with fixed-emitter biasing topology, supporting both linear amplification (h_FE = 50 at I_C = 10 mA) and saturated switching (V_CE(sat) = 0.75 V at I_C = 500 mA, I_B = 50 mA). Its small-signal gain h_fe reaches 250 at 1 mA but drops to 1.5 at 100 MHz, confirming audio- and DC-coupled use rather than RF.

Thermal design relies on its R_θJA = 200 °C/W and 625 mW total dissipation at 25°C (derated 5.0 mW/°C above), limiting sustained operation above ~85°C ambient without heatsinking. The device exhibits typical storage time (t_s = 225 ns) and fall time (t_f = 30 ns), making it suitable for <100 kHz switching applications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	40 V - maximum safe collector-emitter voltage before breakdown under open-base conditions
I_C (continuous)	600 mA - absolute max DC collector current; usable up to 500 mA with verified V_CE(sat)
h_FE	30–150 - DC current gain range across operating points; 50 at 10 mA enables predictable base drive sizing
V_CE(sat)	0.75 V @ I_C = 500 mA, I_B = 50 mA - defines conduction loss and heat generation in switch mode
R_θJA	200 °C/W - junction-to-ambient thermal resistance in free-air TO-92 mounting; dictates derating curve
t_s / t_f	225 ns / 30 ns - storage and fall times at 150 mA; sets upper limit for reliable 100 kHz switching

Pinout & Package

2N4402_S00Z is housed in a through-hole TO-92 package (3-lead, epoxy molded, 0.125" lead spacing), with standardized pinout when viewed from flat side: Emitter (left), Base (center), Collector (right).

Pin/Terminal	Circuit Role	Design Meaning
Emitter	Current sink terminal for PNP operation	Connected to higher potential (e.g., V_CC) in common-emitter switch configurations
Base	Control input for minority-carrier injection	Requires negative-going drive relative to emitter to turn on; 50 mA base current needed for 500 mA saturation
Collector	Output current path	Typically tied to load and ground; reverse-biased during cutoff (V_CBO = 40 V rating)

Key Features

Feature	Design Value
High V_CEO/V_CBO symmetry	40 V rating on both junctions enables robust operation in bidirectional or floating-node circuits
Wide h_FE operating range	30–150 supports both precision biasing (low I_C) and high-current switching (I_C ≥ 150 mA) with same part
Low V_BE(sat)	0.95 V @ 500 mA reduces base drive power and simplifies level-shifting in TTL-compatible interfaces
TO-92 mechanical standardization	Industry-standard footprint ensures compatibility with legacy PCBs, sockets, and hand-soldering workflows

Applications

Relay Driver Stage	Discrete Logic Inverter
Use Scenario: Driving 12 V, 100 mA electromechanical relay coil from microcontroller GPIO. IC Role / Device Role / Timing Role: PNP switch configured in common-emitter mode, sinking relay current to ground when base is pulled low. Use Value: V_CE(sat) ≤ 0.75 V minimizes coil voltage drop; 600 mA I_C rating provides 6× safety margin over relay requirement.	Use Scenario: Level-shifting and inversion of 5 V TTL signals in legacy industrial control backplanes. IC Role / Device Role / Timing Role: Discrete inverter stage with pull-up resistor, providing active-low output compatible with 74LS inputs. Use Value: h_FE ≥ 50 at 10 mA ensures full saturation with minimal base current; TO-92 allows dense placement on control cards.
Linear Audio Preamp	Power Supply Enable Switch
Use Scenario: Low-noise, single-ended preamplifier stage for microphone or sensor signal conditioning (≤ 20 kHz). IC Role / Device Role / Timing Role: Common-emitter amplifier biased at I_C = 1–5 mA for optimal h_FE and h_ie (0.75–7.5 kΩ). Use Value: h_fe = 250 at 1 mA delivers sufficient small-signal gain; C_ib = 30 pF avoids HF roll-off in audio band.	Use Scenario: Enabling/disabling +5 V rail to peripheral modules using MCU-controlled PNP high-side switch. IC Role / Device Role / Timing Role: Emitter-follower configuration where collector connects to +5 V, emitter supplies load, base driven by MCU. Use Value: V_EBO = 5.0 V matches TTL logic swing; 225 ns storage time limits enable/disable transition to <5 µs.

Relay Driver Stage

Discrete Logic Inverter

Use Scenario: Driving 12 V, 100 mA electromechanical relay coil from microcontroller GPIO.

IC Role / Device Role / Timing Role: PNP switch configured in common-emitter mode, sinking relay current to ground when base is pulled low.

Use Value: V_CE(sat) ≤ 0.75 V minimizes coil voltage drop; 600 mA I_C rating provides 6× safety margin over relay requirement.

Use Scenario: Level-shifting and inversion of 5 V TTL signals in legacy industrial control backplanes.

IC Role / Device Role / Timing Role: Discrete inverter stage with pull-up resistor, providing active-low output compatible with 74LS inputs.

Use Value: h_FE ≥ 50 at 10 mA ensures full saturation with minimal base current; TO-92 allows dense placement on control cards.

Linear Audio Preamp

Power Supply Enable Switch

Use Scenario: Low-noise, single-ended preamplifier stage for microphone or sensor signal conditioning (≤ 20 kHz).

IC Role / Device Role / Timing Role: Common-emitter amplifier biased at I_C = 1–5 mA for optimal h_FE and h_ie (0.75–7.5 kΩ).

Use Value: h_fe = 250 at 1 mA delivers sufficient small-signal gain; C_ib = 30 pF avoids HF roll-off in audio band.

Use Scenario: Enabling/disabling +5 V rail to peripheral modules using MCU-controlled PNP high-side switch.

IC Role / Device Role / Timing Role: Emitter-follower configuration where collector connects to +5 V, emitter supplies load, base driven by MCU.

Use Value: V_EBO = 5.0 V matches TTL logic swing; 225 ns storage time limits enable/disable transition to <5 µs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MPSA92	V_CEO = 300 V, h_FE = 25–100, TO-92 package	Higher voltage rating suits HV analog switches; lower h_FE requires larger base drive	Select when >40 V collector swing is required; not drop-in due to gain and saturation voltage mismatch
BC557	V_CEO = 45 V, I_C = 100 mA, h_FE = 125–800, TO-92	Lower current rating limits use to ≤100 mA loads; higher h_FE eases base drive but increases sensitivity to leakage	Choose for low-power signal inversion where 600 mA capability is unnecessary; verify V_CE(sat) at target I_C

Compared with MPSA92 and BC557, the 2N4402_S00Z uniquely balances 40 V breakdown, 600 mA current, and moderate h_FE spread - making it optimal for mid-range switching and amplification where reliability, thermal margin, and TO-92 fit are jointly critical.

Availability

2N4402_S00Z is available at Aetrix Electronics and suitable for relay drivers, discrete logic inverters, linear audio preamps, and power supply enable switches requiring stable component supply and long-term industrial availability.

Supply support for 2N4402_S00Z 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 2N4402_S00Z belongs to Fairchild's legacy general-purpose bipolar transistor family, engineered for cost-sensitive, high-reliability industrial and consumer applications where TO-92 compatibility and predictable DC characteristics are essential.

FAQ

What is the maximum continuous collector current rating for the 2N4402_S00Z?

The 2N4402_S00Z has an absolute maximum continuous collector current (I_C) rating of 600 mA at T_A = 25°C. However, its specified V_CE(sat) is validated up to 500 mA with 50 mA base drive. Sustained operation near 600 mA requires strict thermal management due to its 200 °C/W R_θJA.

Does the 2N4402_S00Z support switching applications, and what are its key timing parameters?

Yes, the 2N4402_S00Z is qualified for switching use with documented delay (t_d = 15 ns), rise (t_r = 20 ns), storage (t_s = 225 ns), and fall (t_f = 30 ns) times at I_C = 150 mA. Its 225 ns storage time limits practical operation to ≤100 kHz in saturated switching; for faster transitions, consider devices with shorter t_s.

What is the DC current gain (h_FE) range of the 2N4402_S00Z across its operating conditions?

The 2N4402_S00Z exhibits h_FE = 30 at I_C = 1.0 mA, 50 at I_C = 10 mA, 50 at I_C = 150 mA, and 20 at I_C = 500 mA (all at V_CE = 1–2 V). This non-monotonic behavior reflects optimized gain distribution for both small-signal amplification and high-current switching within one device.

Can the 2N4402_S00Z be used in high-temperature environments, and what is its junction temperature limit?

The 2N4402_S00Z supports operation from –55°C to +150°C junction temperature. Its 625 mW power dissipation is fully rated only at 25°C ambient and derates linearly at 5.0 mW/°C above that point. At 85°C ambient, max dissipation drops to ~325 mW - requiring careful thermal design for continuous 500 mA use.

Is the 2N4402_S00Z pin-compatible with other TO-92 PNP transistors like the BC557 or MPSA92?

The 2N4402_S00Z uses standard TO-92 pinout (E-B-C, flat side facing viewer), matching BC557 and MPSA92 mechanically. However, electrical differences - including h_FE, V_CE(sat), and I_C rating - mean direct substitution requires circuit validation. It is not a guaranteed drop-in replacement despite identical packaging.

2N4402_S00Z Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 600 mA

Voltage - Collector Emitter Breakdown (Max):: 40 V

Vce Saturation (Max) @ Ib, Ic:: 750mV @ 50mA, 500mA

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: 50 @ 150mA, 2V

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

2N4402_S00Z FAQ

1.How can I place an order for 2N4402_S00Z through Aetrix?

Please submit a Request for Quotation (RFQ) for 2N4402_S00Z 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 2N4402_S00Z reliable?

The price and inventory of 2N4402_S00Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2N4402_S00Z is usually 5 days.

3.What payment methods are accepted for 2N4402_S00Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2N4402_S00Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2N4402_S00Z?

2N4402_S00Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2N4402_S00Z 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 2N4402_S00Z?

For technical support, including 2N4402_S00Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2N4402_S00Z requirements.

6.How does Aetrix verify that 2N4402_S00Z is sourced from the original manufacturer or authorized distributors?

All 2N4402_S00Z 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 2N4402_S00Z meets industry standards.

7.What is the process for return or replacement of 2N4402_S00Z?

All 2N4402_S00Z units undergo pre-shipment inspection (PSI). If there is an issue with 2N4402_S00Z, 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 2N4402_S00Z part is unused and in its original packaging.

Return procedure for 2N4402_S00Z:

1.Submit a request within 90 days.

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

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