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

Renesas 2SA1222-T-AZ

Name: 2SA1222-T-AZ
Brand: Renesas
SKU: 2SA1222-T-AZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SA1222-T-AZ

Manufacturer:: Renesas

Category:: Single Bipolar Transistors

Package:: 3-SSIP

Datasheet:: 2SA1222-T-AZ.pdf

Description:: TRANS PNP 160V 0.5A

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2SA1222-T-AZ from Renesas Electronics is a PNP silicon epitaxial transistor designed for low-frequency power amplification, with V_CEO = −160 V, I_C(DC) = −500 mA, P_T = 1.0 W, h_FE = 100–400 at −100 mA/−2 V, and f_T = 30–45 MHz - used in TV vertical deflection output stages and audio power amplifiers.

For engineers reviewing the 2SA1222-T-AZ datasheet, 2SA1222-T-AZ pinout, 2SA1222-T-AZ application, or 2SA1222-T-AZ equivalent, key selection criteria include high-voltage PNP capability, complementary pairing with 2SC2959, DC current gain consistency at −100 mA, saturation voltage under pulse conditions, and thermal derating behavior up to 150°C junction temperature.

Technical Context

This device operates as a medium-power, high-voltage PNP switching and linear amplifier transistor. Its −160 V V_CEO rating and −1.0 A pulsed collector current support robust vertical deflection drive in CRT-based video systems, while its 30–45 MHz f_T enables stable low-frequency power gain without RF instability.

The transistor features a complementary pair relationship with 2SC2959 (NPN), sharing identical package, thermal characteristics, and voltage/current ratings. Electrical behavior is specified under pulse test conditions (PW ≤ 350 µs, duty ≤ 2%), ensuring reliable performance in repetitive switching applications such as line-output circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−160 V: maximum continuous collector-emitter blocking voltage - supports CRT vertical deflection supply rails up to −140 V DC with safety margin.
I_C(DC)	−500 mA: steady-state collector current limit - defines usable DC bias range for Class-A/B audio output stages.
P_T	1.0 W at T_a = 25°C: total power dissipation - requires heatsinking above ~40°C ambient for sustained operation.
h_FE	100–400 at V_CE = −2 V, I_C = −100 mA: DC current gain spread - enables predictable bias design in fixed-current mirror or emitter-follower configurations.
f_T	30–45 MHz: gain-bandwidth product - ensures adequate small-signal gain stability below 1 MHz, suitable for audio and deflection frequencies.
V_CE(sat)	−0.6 to −0.9 V at I_C = −1.0 A, I_B = −0.2 A: collector-emitter saturation voltage - determines conduction loss and thermal rise during switching transitions.
C_ob	24–40 pF at V_CB = −10 V: output capacitance - impacts switching speed and resonant behavior in flyback-type deflection circuits.

Pinout & Package

2SA1222-T-AZ is housed in a TO-126 plastic package (M8E outline), with leads arranged in E-C-B order (Emitter–Collector–Base) when viewed from the front with tab down.

Pin/Terminal	Circuit Role	Design Meaning
Emitter (E)	Current sink terminal for PNP operation	Connected to most positive rail in common-emitter amplifier; provides reference for base drive return path.
Collector (C)	Main current output terminal	Drives inductive load (e.g., deflection yoke); must withstand −160 V reverse bias and handle pulsed currents up to −1.0 A.
Base (B)	Control input for minority-carrier injection	Receives negative-going drive signal; requires −0.64 V typical V_BE at −20 mA to ensure full turn-on.

Key Features

Feature	Design Value
High V_CEO rating	−160 V enables direct use in CRT vertical output stages without series stacking or snubbing overhead.
Complementary pairing	Matched electrical specs and package with 2SC2959 - simplifies push-pull amplifier layout and thermal tracking.
Pulsed current capability	−1.0 A peak (PW ≤ 10 ms, duty ≤ 50%) supports transient load demands in line-scan circuits.
Low V_CE(sat)	≤ −0.9 V at high drive ensures <1 W conduction loss even under full pulse load, reducing heatsink requirements.
Stable h_FE range	100–400 at −100 mA allows consistent DC bias design across production lots without individual trimming.

Applications

TV Vertical Deflection Output	Audio Power Amplifier Stage
Use Scenario: Driving the vertical deflection yoke in CRT television receivers with sawtooth waveform generation and flyback recovery. IC Role / Device Role / Timing Role: High-voltage PNP switch amplifying retrace pulses and sustaining vertical scan current. Use Value: −160 V V_CEO and −1.0 A pulsed current meet IEC 60065 line-scan stress requirements without external clamping.	Use Scenario: Output stage in Class-AB audio amplifiers delivering up to 1 W into 8 Ω loads. IC Role / Device Role / Timing Role: Linear PNP power transistor in emitter-follower configuration providing current gain and low output impedance. Use Value: h_FE ≥ 100 at −100 mA ensures stable quiescent current setting and minimal crossover distortion.
Variable DC Power Supply Regulator	Industrial Relay Driver
Use Scenario: Series pass element in adjustable linear power supplies requiring >100 V output compliance. IC Role / Device Role / Timing Role: Voltage-controlled current source regulating output via base voltage feedback loop. Use Value: V_CEO = −160 V and P_T = 1.0 W allow safe operation at 120 V DC output with 20 V dropout margin.	Use Scenario: High-side driver for 24–48 V DC industrial relays with inductive kickback suppression. IC Role / Device Role / Timing Role: Saturated PNP switch controlling relay coil current with fast turn-off aided by base discharge path. Use Value: V_CE(sat) ≤ −0.9 V minimizes power loss (≤ 0.9 W at 1 A), enabling compact PCB-mount relay modules.

TV Vertical Deflection Output

Audio Power Amplifier Stage

Use Scenario: Driving the vertical deflection yoke in CRT television receivers with sawtooth waveform generation and flyback recovery.

IC Role / Device Role / Timing Role: High-voltage PNP switch amplifying retrace pulses and sustaining vertical scan current.

Use Value: −160 V V_CEO and −1.0 A pulsed current meet IEC 60065 line-scan stress requirements without external clamping.

Use Scenario: Output stage in Class-AB audio amplifiers delivering up to 1 W into 8 Ω loads.

IC Role / Device Role / Timing Role: Linear PNP power transistor in emitter-follower configuration providing current gain and low output impedance.

Use Value: h_FE ≥ 100 at −100 mA ensures stable quiescent current setting and minimal crossover distortion.

Variable DC Power Supply Regulator

Industrial Relay Driver

Use Scenario: Series pass element in adjustable linear power supplies requiring >100 V output compliance.

IC Role / Device Role / Timing Role: Voltage-controlled current source regulating output via base voltage feedback loop.

Use Value: V_CEO = −160 V and P_T = 1.0 W allow safe operation at 120 V DC output with 20 V dropout margin.

Use Scenario: High-side driver for 24–48 V DC industrial relays with inductive kickback suppression.

IC Role / Device Role / Timing Role: Saturated PNP switch controlling relay coil current with fast turn-off aided by base discharge path.

Use Value: V_CE(sat) ≤ −0.9 V minimizes power loss (≤ 0.9 W at 1 A), enabling compact PCB-mount relay modules.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP power transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
2SA1221-T-AZ	V_CEO = −140 V (vs. −160 V); otherwise identical package, pinout, and h_FE/f_T specs.	Not suitable for designs requiring >140 V collector swing - e.g., higher-voltage CRT deflection or industrial supplies.	Select only if system V_CC remains ≤ −120 V with margin; verify flyback voltage peaks do not exceed −140 V.
MJD2955G	TO-220 package (vs. TO-126); V_CEO = −70 V; higher I_C(DC) = −10 A but lower voltage rating.	Better suited for high-current, low-voltage motor control or power regulation - not interchangeable in high-voltage deflection circuits.	Use only when board layout accommodates TO-220 footprint and application voltage stays below −60 V.

Compared with 2SA1221-T-AZ and MJD2955G, the 2SA1222-T-AZ uniquely balances −160 V blocking capability with TO-126 thermal and space efficiency - making it irreplaceable in legacy CRT vertical output and medium-voltage linear regulator designs where both voltage headroom and package size are constrained.

Availability

2SA1222-T-AZ is available at Aetrix Electronics and suitable for TV vertical deflection output, audio power amplifier stage, and variable DC power supply regulator applications requiring stable component supply and long-term obsolescence management.

Supply support for 2SA1222-T-AZ 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

Renesas Electronics Corporation is a Japanese semiconductor manufacturer formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, power, and discrete devices.

The 2SA1222-T-AZ belongs to Renesas' legacy silicon bipolar transistor family targeting analog power control in consumer video, audio, and industrial linear systems - designed for reliability in standard-grade applications including home electronics and test equipment.

FAQ

What is the maximum collector-emitter voltage rating for 2SA1222-T-AZ?

The 2SA1222-T-AZ has a V_CEO rating of −160 V, verified per its official Renesas datasheet D16143EJ1V0DS00. This rating defines the maximum continuous reverse-biased voltage the transistor can block between collector and emitter at T_a = 25°C. Operation beyond this value risks avalanche breakdown. Derating is required at elevated temperatures - consult the datasheet's Safe Operating Area (SOA) curves for design validation.

Is 2SA1222-T-AZ pin-compatible with 2SA1221-T-AZ?

Yes, 2SA1222-T-AZ and 2SA1221-T-AZ share identical TO-126 package outlines and E-C-B pin configuration. Both devices have matching mechanical dimensions and lead assignments. However, their V_CEO ratings differ (−160 V vs. −140 V), so substitution requires verification that the application's peak collector voltage remains within the lower-rated device's limit.

What is the typical DC current gain (h_FE) of 2SA1222-T-AZ at operating conditions?

The 2SA1222-T-AZ exhibits h_FE = 100–400 when measured at V_CE = −2.0 V and I_C = −100 mA, per the Renesas datasheet. This range reflects production lot variation and ensures predictable biasing in linear amplifier and switching applications. For critical gain-dependent designs, consider using the minimum (100) or maximum (400) value in worst-case analysis.

Does 2SA1222-T-AZ require a heatsink in normal operation?

At full 1.0 W power dissipation and ambient temperatures above 40°C, the 2SA1222-T-AZ exceeds its thermal limits without heatsinking. The TO-126 package has a junction-to-ambient thermal resistance (R_θJA) of approximately 150°C/W. To maintain T_j ≤ 150°C, a heatsink or copper pour is recommended for continuous operation above 300 mW - especially in enclosed or high-temperature environments.

What complementary NPN transistor pairs with 2SA1222-T-AZ?

The 2SA1222-T-AZ is explicitly designated as complementary to the 2SC2959 NPN transistor in the Renesas datasheet. Both share matched V_CEO/V_CBO, I_C, P_T, and f_T specifications, and are optimized for push-pull amplifier topologies. Their electrical symmetry and identical TO-126 packaging simplify thermal and layout design in balanced output stages.

2SA1222-T-AZ Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 3-SSIP

Packaging:: Bulk

Product Status:: Active

Transistor Type:: PNP

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

Voltage - Collector Emitter Breakdown (Max):: 160 V

Vce Saturation (Max) @ Ib, Ic:: 900mV @ 200mA, 1A

Current - Collector Cutoff (Max):: 200nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 100mA, 2V

Power - Max:: 1 W

Frequency - Transition:: 45MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: -

2SA1222-T-AZ FAQ

1.How can I place an order for 2SA1222-T-AZ through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SA1222-T-AZ 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 2SA1222-T-AZ reliable?

The price and inventory of 2SA1222-T-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SA1222-T-AZ is usually 5 days.

3.What payment methods are accepted for 2SA1222-T-AZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SA1222-T-AZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SA1222-T-AZ?

2SA1222-T-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SA1222-T-AZ 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 2SA1222-T-AZ?

For technical support, including 2SA1222-T-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SA1222-T-AZ requirements.

6.How does Aetrix verify that 2SA1222-T-AZ is sourced from the original manufacturer or authorized distributors?

All 2SA1222-T-AZ 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 2SA1222-T-AZ meets industry standards.

7.What is the process for return or replacement of 2SA1222-T-AZ?

All 2SA1222-T-AZ units undergo pre-shipment inspection (PSI). If there is an issue with 2SA1222-T-AZ, 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 2SA1222-T-AZ part is unused and in its original packaging.

Return procedure for 2SA1222-T-AZ:

1.Submit a request within 90 days.

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

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