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

onsemi PZT3906T1

Name: PZT3906T1
Brand: onsemi
SKU: PZT3906T1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PZT3906T1

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-261-4, TO-261AA

Datasheet:: PZT3906T1.pdf

Description:: TRANS PNP 40V 0.2A SOT223

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PZT3906T1 from onsemi is a PNP silicon general-purpose transistor in SOT-223 package, rated for −40 V V_CEO, −200 mA I_C, and 1.5 W power dissipation at T_A = 25°C. It delivers DC current gain (h_FE) of 60–300 across 0.1–100 mA I_C, with V_CE(sat) ≤ −0.4 V at −50 mA/−5 mA drive, suitable for low-voltage switching and linear amplification in industrial control interfaces.

For engineers reviewing the PZT3906T1 datasheet, pinout, applications, or equivalent options, key selection criteria include verified PNP polarity, SOT-223 thermal performance (R_θJA = 83.3°C/W), guaranteed h_FE minima at multiple bias points, V_CEO/V_CBO = −40 V rating, and RoHS-compliant Pb-free packaging.

Technical Context

This discrete PNP bipolar junction transistor operates in active, saturation, and cutoff regions with defined small-signal parameters: f_T = 250 MHz, C_obo = 4.5 pF, and h_fe = 100–400 at I_C = −1.0 mA. Its switching behavior is characterized by t_d/t_r ≤ 35 ns and t_s ≤ 225 ns under specified test conditions (V_CC = −3.0 V, I_C = −10 mA).

Thermal design relies on R_θJL = 35°C/W to lead #4 and validated junction temperature range of −55°C to +150°C. Electrical robustness includes V_(BR)EBO = −5.0 V and leakage limits: I_BL, I_CEX ≤ −50 nA at V_CE = −30 V, V_EB = −3.0 V.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−40 V - Maximum safe collector-emitter voltage before breakdown in common-emitter configuration
I_C	−200 mA - Continuous DC collector current handling capability without derating at 25°C ambient
P_D	1.5 W - Total device power dissipation limit on FR-4 PCB with 1 oz copper and 713 mm² copper area
h_FE	60–300 - DC current gain range across operating currents from 0.1 mA to 100 mA at V_CE = −1.0 V
f_T	250 MHz - Transition frequency defining usable bandwidth for small-signal amplification
R_θJA	83.3°C/W - Thermal resistance from junction to ambient, critical for heatsink-less operation on standard PCB
V_CE(sat)	≤ −0.4 V - Maximum collector-emitter voltage in saturation at −50 mA I_C and −5 mA I_B, minimizing conduction loss

Pinout & Package

SOT-223 (Case 318E) surface-mount package with exposed thermal pad on lead #4 (collector). Four-terminal configuration supports high-power dissipation via PCB copper area.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal for forward-biased base-emitter junction; requires negative bias relative to emitter for PNP turn-on
2 & 4	Collector	High-current output terminal; pins 2 and 4 are internally connected and thermally tied to exposed pad for enhanced heat transfer
3	Emiter	Reference terminal for current flow; connects to higher potential rail in PNP switching applications

Key Features

Feature	Design Value
Pb-free, Halogen-free, RoHS-compliant	Meets global environmental regulations without compromising solderability or reliability
V_(BR)CEO = −40 V	Enables use in 24 V and 36 V industrial bus systems with margin against transients
h_FE ≥ 60 at I_C = −100 mA	Ensures sufficient gain for driving moderate loads without excessive base current demand
t_s ≤ 225 ns	Supports switching frequencies up to ~1 MHz in non-critical digital logic interface applications
Junction temp. range −55°C to +150°C	Validates operation in extended-temperature automotive and industrial environments

Applications

Industrial Sensor Interface	LED Driver Switch
Use Scenario: Level-shifting and current amplification for analog sensor outputs feeding microcontroller ADC inputs in PLC modules. IC Role / Device Role / Timing Role: PNP switch providing inverted signal conditioning and sink capability for 0–10 V or 4–20 mA loop receivers. Use Value: V_CE(sat) ≤ −0.4 V ensures minimal voltage drop across collector-emitter path, preserving signal headroom for precision measurement.	Use Scenario: High-side current control for indicator LEDs in HMI panels and status displays. IC Role / Device Role / Timing Role: General-purpose PNP switch enabling simple on/off control from low-voltage logic outputs. Use Value: Guaranteed h_FE ≥ 60 at −100 mA allows direct drive from MCU GPIO without external base resistor optimization.
Relay Driver Circuit	Linear Voltage Regulator Pass Element
Use Scenario: Driving electromagnetic relay coils requiring 20–100 mA coil current in factory automation controllers. IC Role / Device Role / Timing Role: Saturated PNP switch interfacing between logic-level control signals and inductive loads. Use Value: Fast storage time (t_s ≤ 225 ns) reduces relay release delay and minimizes back-EMF exposure during turn-off.	Use Scenario: Series pass transistor in adjustable low-dropout linear regulators for point-of-load power supplies. IC Role / Device Role / Timing Role: Linear-mode PNP regulator element dissipating up to 1.5 W with stable h_FE over temperature. Use Value: R_θJA = 83.3°C/W enables thermal management using only PCB copper, eliminating need for discrete heatsinks.

Industrial Sensor Interface

LED Driver Switch

Use Scenario: Level-shifting and current amplification for analog sensor outputs feeding microcontroller ADC inputs in PLC modules.

IC Role / Device Role / Timing Role: PNP switch providing inverted signal conditioning and sink capability for 0–10 V or 4–20 mA loop receivers.

Use Value: V_CE(sat) ≤ −0.4 V ensures minimal voltage drop across collector-emitter path, preserving signal headroom for precision measurement.

Use Scenario: High-side current control for indicator LEDs in HMI panels and status displays.

IC Role / Device Role / Timing Role: General-purpose PNP switch enabling simple on/off control from low-voltage logic outputs.

Use Value: Guaranteed h_FE ≥ 60 at −100 mA allows direct drive from MCU GPIO without external base resistor optimization.

Relay Driver Circuit

Linear Voltage Regulator Pass Element

Use Scenario: Driving electromagnetic relay coils requiring 20–100 mA coil current in factory automation controllers.

IC Role / Device Role / Timing Role: Saturated PNP switch interfacing between logic-level control signals and inductive loads.

Use Value: Fast storage time (t_s ≤ 225 ns) reduces relay release delay and minimizes back-EMF exposure during turn-off.

Use Scenario: Series pass transistor in adjustable low-dropout linear regulators for point-of-load power supplies.

IC Role / Device Role / Timing Role: Linear-mode PNP regulator element dissipating up to 1.5 W with stable h_FE over temperature.

Use Value: R_θJA = 83.3°C/W enables thermal management using only PCB copper, eliminating need for discrete heatsinks.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT3906	SOT-23 package, lower P_D = 350 mW, R_θJA = 275°C/W, same V_CEO/I_C ratings	Limited to low-power signal switching; unsuitable for >100 mW continuous dissipation	Select MMBT3906 only when board space is constrained and thermal load is <150 mW
ZTX653	SOT-89 package, higher P_D = 2.5 W, V_CEO = −60 V, h_FE = 100–400 at I_C = −100 mA	Supports higher voltage rails and greater power dissipation; larger footprint than SOT-223	Choose ZTX653 when system requires >−40 V blocking or >1.5 W dissipation with improved thermal margin

Compared with MMBT3906 and ZTX653, the PZT3906T1 balances medium-power capability (1.5 W), compact SOT-223 form factor, and proven industrial temperature range, making it optimal for cost-sensitive embedded controls where thermal performance exceeds SOT-23 but SOT-89 real estate is unavailable.

Availability

PZT3906T1 is available at Aetrix Electronics and suitable for industrial sensor interfaces, LED driver switches, relay drivers, and linear voltage regulator pass elements requiring stable component supply and long-term manufacturability.

Supply support for PZT3906T1 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 specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The PZT3906T1 belongs to onsemi's general-purpose bipolar transistor product line, engineered for reliable switching and amplification in cost-sensitive industrial and commercial equipment where robustness, thermal performance, and regulatory compliance are essential.

FAQ

What is the maximum continuous collector current rating for the PZT3906T1?

The PZT3906T1 has a maximum continuous collector current (I_C) rating of −200 mA at T_A = 25°C. This rating assumes operation within the specified thermal limits and proper PCB layout with adequate copper area. Derating is required above 25°C ambient per the R_θJA = 83.3°C/W specification, and the PZT3906T1 must not be operated beyond its absolute maximum ratings to ensure long-term reliability.

Does the PZT3906T1 support operation at elevated temperatures?

Yes, the PZT3906T1 is qualified for junction and storage temperatures from −55°C to +150°C. Its electrical characteristics-including h_FE, V_CE(sat), and leakage currents-are specified over this full range, and thermal design using R_θJL = 35°C/W to lead #4 enables sustained operation in demanding industrial environments where ambient temperatures exceed 85°C.

Is the PZT3906T1 pin-compatible with other SOT-223 PNP transistors?

The PZT3906T1 uses the standard SOT-223 pinout: Pin 1 = Base, Pins 2 & 4 = Collector (internally connected), Pin 3 = Emitter. While many SOT-223 PNP transistors share this assignment, pin compatibility alone does not guarantee functional equivalence-electrical parameters such as h_FE, V_CE(sat), and power dissipation must be verified individually for each replacement candidate.

What is the typical transition frequency (f_T) of the PZT3906T1?

The PZT3906T1 has a minimum transition frequency (f_T) of 250 MHz, measured at I_C = −10 mA, V_CE = −20 V, and f = 100 MHz. This parameter reflects its small-signal high-frequency amplification capability and supports use in RF preamplifier stages or fast-switching applications up to several tens of MHz, provided layout parasitics are minimized.

How does the PZT3906T1 handle leakage current at high V_CE?

The PZT3906T1 specifies collector cutoff current (I_CEX) and base cutoff current (I_BL) ≤ −50 nA at V_CE = −30 Vdc and V_EB = −3.0 Vdc. These ultra-low leakage values ensure stable off-state behavior in precision analog circuits and battery-powered systems where standby current must remain below 100 nA.

PZT3906T1 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-261-4, TO-261AA

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 200 mA

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

Vce Saturation (Max) @ Ib, Ic:: 400mV @ 5mA, 50mA

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 10mA, 1V

Power - Max:: 1.5 W

Frequency - Transition:: 250MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-223 (TO-261)

PZT3906T1 FAQ

1.How can I place an order for PZT3906T1 through Aetrix?

Please submit a Request for Quotation (RFQ) for PZT3906T1 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 PZT3906T1 reliable?

The price and inventory of PZT3906T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZT3906T1 is usually 5 days.

3.What payment methods are accepted for PZT3906T1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZT3906T1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PZT3906T1?

PZT3906T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PZT3906T1 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 PZT3906T1?

For technical support, including PZT3906T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZT3906T1 requirements.

6.How does Aetrix verify that PZT3906T1 is sourced from the original manufacturer or authorized distributors?

All PZT3906T1 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 PZT3906T1 meets industry standards.

7.What is the process for return or replacement of PZT3906T1?

All PZT3906T1 units undergo pre-shipment inspection (PSI). If there is an issue with PZT3906T1, 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 PZT3906T1 part is unused and in its original packaging.

Return procedure for PZT3906T1:

1.Submit a request within 90 days.

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

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