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

onsemi TIS97_D26Z

Name: TIS97_D26Z
Brand: onsemi
SKU: TIS97_D26Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TIS97_D26Z

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: TIS97_D26Z.pdf

Description:: TRANS NPN 40V 0.5A TO-92-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TIS97_D26Z from Fairchild Semiconductor is an NPN general-purpose bipolar junction transistor (BJT) designed for amplification and switching in low-to-medium power circuits, with confirmed V_CEO = 40 V, I_C = 500 mA continuous, h_FE = 250–700 at I_C = 100 µA, and TO-92 package. It serves in signal conditioning stages of consumer audio preamps, LED driver switches, and sensor interface buffers.

For engineers reviewing the TIS97_D26Z datasheet, pinout, applications, or equivalent options, key selection factors include its 40 V breakdown rating, 625 mW power dissipation at 25°C, thermal resistance R_θJA = 200 °C/W, and verified suitability for linear amplification and saturated switching below 300 mA collector load.

Technical Context

The TIS97_D26Z operates as a silicon NPN BJT fabricated on Fairchild's Process 10, optimized for general-purpose analog and digital switching. Its DC current gain (h_FE) spans 250–700 across 100 µA–10 mA collector currents, and small-signal h_fe reaches 800 at 1 kHz but drops to 2.0 at 100 MHz-indicating bandwidth-limited RF use.

Thermal design requires attention: R_θJC = 83.3 °C/W and R_θJA = 200 °C/W confirm TO-92's limited heat spreading capability; derating is mandatory above 25°C (5.0 mW/°C), and maximum junction temperature is capped at +150°C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	40 V - Maximum safe collector-emitter voltage before avalanche breakdown; defines upper rail limit in switch/amplifier designs.
I_C (continuous)	500 mA - Absolute max DC collector current; usable up to 300 mA per functional description without thermal runaway.
h_FE	250–700 - DC current gain range at V_CE = 5 V, I_C = 100 µA; enables predictable biasing in Class-A amplifiers.
P_D	625 mW @ 25°C - Total device dissipation; requires heatsinking or derating above ambient 25°C (5.0 mW/°C).
C_cb	1.0–4.0 pF - Collector-base capacitance at V_CB = 5 V, f = 1 MHz; impacts high-frequency gain roll-off and stability in amplifier layouts.
NF	2.0–3.0 dB - Noise figure at I_C = 30–100 µA, R_g = 10 kΩ; suitable for low-noise preamp stages in audio/sensor front-ends.

Pinout & Package

Package: TO-92 (standard straight-lead, no lead clip, EOL code D26Z). Confirmed mechanical dimensions per Fairchild Rev. B drawings: 0.928" height, 0.500" pitch, flat side on bottom, emitter-first orientation in tape-and-reel.

Pin/Terminal	Circuit Role	Design Meaning
Emitter (E)	Current sink terminal	Connected to ground or low-impedance return path; first pin in D26Z tape orientation per Figure 2.0.
Base (B)	Control input	Receives bias current to regulate collector current; requires series resistor to limit I_B per h_FE and I_C target.
Collector (C)	Current source terminal	Drives load toward positive supply; must remain ≤40 V relative to emitter under all operating conditions.

Key Features

Feature	Design Value
General-purpose NPN architecture	Enables dual-role use in both linear amplification (e.g., microphone preamp) and digital switching (e.g., relay driver) without redesign.
Wide h_FE range (250–700)	Reduces need for binning or feedback trimming in production; supports consistent gain across batches at low I_C.
Low noise figure (2.0 dB min)	Permits direct coupling into sensitive analog front-ends without added noise-cancelling circuitry.
TO-92 tape-and-reel packaging (D26Z)	Enables automated pick-and-place assembly at 2000 units/reel; flat-side-down orientation ensures repeatable placement.

Applications

Audio Pre-amplifier Stage	LED Driver Switch
Use Scenario: Amplifying weak signals from electret microphones or piezoelectric sensors before ADC sampling. IC Role / Device Role / Timing Role: NPN common-emitter amplifier with fixed bias network and emitter degeneration resistor. Use Value: Delivers stable 20–30 dB voltage gain with <3 dB noise penalty at 1 kHz, leveraging h_FE ≥250 and NF ≤2.5 dB.	Use Scenario: Driving 20–100 mA indicator LEDs from MCU GPIO pins with logic-level control. IC Role / Device Role / Timing Role: Saturated NPN switch with base resistor limiting I_B to ensure forced β ≥10. Use Value: Supports fast turn-on/turn-off (<100 ns) and handles 50 mA continuous load without thermal throttling at 25°C ambient.
Sensor Interface Buffer	Relay Control Circuit
Use Scenario: Isolating and level-shifting analog outputs from temperature or light sensors to microcontroller inputs. IC Role / Device Role / Timing Role: Emitter-follower buffer providing high input impedance and low output impedance. Use Value: Maintains signal fidelity with <0.1% THD at 10 kHz due to low C_eb = 16 pF and linear h_FE behavior at I_C < 1 mA.	Use Scenario: Activating 5–12 V coil relays in industrial control panels using 3.3 V or 5 V logic signals. IC Role / Device Role / Timing Role: Medium-current switching transistor driving inductive loads with flyback diode protection. Use Value: Handles 300 mA peak coil current and withstands 40 V flyback transients, meeting V_CEO and I_C limits simultaneously.

Audio Pre-amplifier Stage

LED Driver Switch

Use Scenario: Amplifying weak signals from electret microphones or piezoelectric sensors before ADC sampling.

IC Role / Device Role / Timing Role: NPN common-emitter amplifier with fixed bias network and emitter degeneration resistor.

Use Value: Delivers stable 20–30 dB voltage gain with <3 dB noise penalty at 1 kHz, leveraging h_FE ≥250 and NF ≤2.5 dB.

Use Scenario: Driving 20–100 mA indicator LEDs from MCU GPIO pins with logic-level control.

IC Role / Device Role / Timing Role: Saturated NPN switch with base resistor limiting I_B to ensure forced β ≥10.

Use Value: Supports fast turn-on/turn-off (<100 ns) and handles 50 mA continuous load without thermal throttling at 25°C ambient.

Sensor Interface Buffer

Relay Control Circuit

Use Scenario: Isolating and level-shifting analog outputs from temperature or light sensors to microcontroller inputs.

IC Role / Device Role / Timing Role: Emitter-follower buffer providing high input impedance and low output impedance.

Use Value: Maintains signal fidelity with <0.1% THD at 10 kHz due to low C_eb = 16 pF and linear h_FE behavior at I_C < 1 mA.

Use Scenario: Activating 5–12 V coil relays in industrial control panels using 3.3 V or 5 V logic signals.

IC Role / Device Role / Timing Role: Medium-current switching transistor driving inductive loads with flyback diode protection.

Use Value: Handles 300 mA peak coil current and withstands 40 V flyback transients, meeting V_CEO and I_C limits simultaneously.

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 @ 150 mA - lower gain spread, higher I_C rating.	Better suited for higher-current switching (>300 mA); less optimal for low-noise, low-I_C amplification.	Select PN2222A when drive current >300 mA is required and gain consistency at mid-current matters more than noise.
BC547B	V_CEO = 45 V, I_C = 100 mA, h_FE = 200–450 @ 2 mA - tighter h_FE binning, lower I_C limit.	Preferred for low-power, high-gain signal amplification; unsuitable for >100 mA loads.	Choose BC547B for battery-powered sensor nodes where 100 mA max and low quiescent current are critical.

Compared with PN2222A and BC547B, the TIS97_D26Z uniquely balances 500 mA I_C, wide h_FE (250–700), and 2.0 dB NF-making it optimal for cost-sensitive, medium-current analog/digital hybrid circuits where both gain headroom and noise performance matter.

Availability

TIS97_D26Z is available at Aetrix Electronics and suitable for audio preamplifiers, LED driver switches, sensor interface buffers, and relay control circuits requiring stable component supply and legacy-compatible TO-92 sourcing.

Supply support for TIS97_D26Z 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 manufacturer specializing in power management, analog, and discrete devices before its acquisition by ON Semiconductor in 2016.

The TIS97_D26Z belongs to Fairchild's legacy general-purpose BJT family, engineered for broad compatibility in consumer, industrial, and educational electronics where reliability, ease of biasing, and TO-92 manufacturability are prioritized.

FAQ

What is the maximum collector current rating for the TIS97_D26Z?

The TIS97_D26Z has an absolute maximum continuous collector current (I_C) of 500 mA at T_A = 25°C. However, the functional description specifies use "requiring collector currents to 300 mA", and thermal derating (5.0 mW/°C above 25°C) must be applied to avoid exceeding T_J = 150°C. For sustained 300 mA operation, board-level copper area or airflow is recommended.

Does the TIS97_D26Z support low-noise audio amplification?

Yes-the TIS97_D26Z achieves a noise figure (NF) of 2.0 dB at V_CE = 5.0 V, I_C = 30 µA, R_g = 10 kΩ, and BW = 100 Hz, and 3.0 dB at 15.7 kHz bandwidth. This makes it suitable for microphone preamplifiers and sensor signal conditioning where SNR preservation is critical, provided proper emitter degeneration and bypassing are implemented in the TIS97_D26Z circuit layout.

What is the pin configuration for the TIS97_D26Z in TO-92 package?

The TIS97_D26Z uses standard TO-92 pinout: viewed with flat side facing up and leads downward, left-to-right is Emitter (E), Base (B), Collector (C). Per Fairchild Figure 2.0, D26Z tape orientation places the emitter as the first lead off the reel, with adhesive tape on top and flat side on bottom-ensuring correct automated placement alignment for the TIS97_D26Z.

Can the TIS97_D26Z replace the PN2222 in existing designs?

The TIS97_D26Z shares V_CEO = 40 V and TO-92 package with the PN2222, but differs in h_FE range (250–700 vs. 100–300) and noise performance (2.0 dB vs. ~5 dB). It can substitute in low-noise or high-gain bias-sensitive circuits, but may require recalculating base resistors due to higher minimum h_FE. Verify thermal margin at I_C > 300 mA, as the TIS97_D26Z is rated for 500 mA but functionally optimized to 300 mA.

Is the TIS97_D26Z RoHS compliant and halogen-free?

Fairchild's original TIS97 documentation predates RoHS enforcement (2006), and no RoHS or halogen-free certification is stated in the provided datasheet or packaging data. For compliance-critical designs, Aetrix Electronics recommends verifying current lot status via traceable sourcing records or contacting ON Semiconductor (Fairchild's successor) for legacy part declarations. The TIS97_D26Z remains available for legacy repair and non-regulated applications.

TIS97_D26Z 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):: 40 V

Vce Saturation (Max) @ Ib, Ic:: -

Current - Collector Cutoff (Max):: 10nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 250 @ 100µA, 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

TIS97_D26Z FAQ

1.How can I place an order for TIS97_D26Z through Aetrix?

Please submit a Request for Quotation (RFQ) for TIS97_D26Z 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 TIS97_D26Z reliable?

The price and inventory of TIS97_D26Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TIS97_D26Z is usually 5 days.

3.What payment methods are accepted for TIS97_D26Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TIS97_D26Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TIS97_D26Z?

TIS97_D26Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TIS97_D26Z 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 TIS97_D26Z?

For technical support, including TIS97_D26Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TIS97_D26Z requirements.

6.How does Aetrix verify that TIS97_D26Z is sourced from the original manufacturer or authorized distributors?

All TIS97_D26Z 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 TIS97_D26Z meets industry standards.

7.What is the process for return or replacement of TIS97_D26Z?

All TIS97_D26Z units undergo pre-shipment inspection (PSI). If there is an issue with TIS97_D26Z, 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 TIS97_D26Z part is unused and in its original packaging.

Return procedure for TIS97_D26Z:

1.Submit a request within 90 days.

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

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