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

Toshiba Semiconductor and Storage 2SA1244-Y(T6L1,NQ)

Name: 2SA1244-Y(T6L1,NQ)
Brand: Toshiba Semiconductor and Storage
SKU: 2SA1244-Y(T6L1,NQ)
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SA1244-Y(T6L1,NQ)

Manufacturer:: Toshiba Semiconductor and Storage

Category:: Single Bipolar Transistors

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: 2SA1244-Y(T6L1,NQ).pdf

Description:: TRANS PNP 50V 5A PW-MOLD

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2SA1244-Y(T6L1,NQ) from Toshiba is a silicon PNP epitaxial transistor using the PCT process, designed for high-current switching applications. It delivers V_CE(sat) = −0.4 V (max) at I_C = −3 A, f_T = 60 MHz (typ.), and supports I_C = −5 A continuous with V_CEO = −50 V, commonly used in relay drivers and power supply control circuits.

For engineers reviewing the 2SA1244-Y(T6L1,NQ) datasheet, 2SA1244-Y(T6L1,NQ) pinout, 2SA1244-Y(T6L1,NQ) application, or 2SA1244-Y(T6L1,NQ) equivalent, key selection criteria include guaranteed h_FE range (120–240), low saturation voltage under high current, thermal derating behavior, and complementary pairing with 2SC3074 in push-pull configurations.

Technical Context

This PNP bipolar junction transistor operates in common-emitter configuration with DC current gain h_FE specified at two test points: 70–240 at I_C = −1 A and ≥30 at I_C = −3 A. Its switching performance is characterized by t_stg = 1.0 μs (typ.) and t_f = 0.1 μs (typ.), enabled by low C_ob = 170 pF and high f_T.

The device uses Toshiba's PCT (Planar Collector Technology) process for stable high-current operation and features a TO-220AB package with electrically isolated collector tab. Absolute maximum ratings include T_j = 150°C and safe operating area (SOA) defined for both DC and pulsed conditions up to 10 ms.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−50 V - Maximum allowable collector-emitter voltage before breakdown in open-base condition
I_C (cont.)	−5 A - Continuous collector current rating at T_c = 25°C, defining steady-state power switch capability
V_CE(sat)	−0.4 V (max) at I_C = −3 A, I_B = −0.15 A - Low conduction loss critical for efficiency in saturated-switching topologies
h_FE (Y grade)	120–240 at V_CE = −1 V, I_C = −1 A - Guaranteed DC gain band enabling predictable base drive sizing
f_T	60 MHz (typ.) at V_CE = −4 V, I_C = −1 A - Transition frequency indicating usable bandwidth for medium-speed switching
C_ob	170 pF at V_CB = −10 V - Output capacitance affecting turn-off speed and EMI in hard-switched circuits

Pinout & Package

2SA1244-Y(T6L1,NQ) is housed in a TO-220AB package (Toshiba designation: 2-7J1A), featuring an electrically isolated collector tab for direct heatsink mounting without insulating hardware.

Pin/Terminal	Circuit Role	Design Meaning
Collector (Tab)	Main current output terminal	Electrically isolated metal tab - enables low-thermal-resistance heatsinking while maintaining electrical separation from PCB ground
Base	Control input for minority-carrier injection	Low-impedance gate-like node requiring I_B ≈ I_C/20 for saturation; sensitive to ESD due to thin oxide layer
Emitter	Current return path and reference node	Connected to system ground or negative rail in high-side switch configurations; carries full load current

Key Features

Feature	Design Value
Low V_CE(sat)	−0.4 V max at −3 A ensures <1.2 W conduction loss, reducing thermal stress in 24 V industrial controls
High-speed switching	t_stg = 1.0 μs typ. enables >100 kHz PWM operation in DC-DC pre-regulators and motor gate drivers
Complementary pairing	Explicitly matched to 2SC3074 NPN for symmetrical push-pull amplifier and H-bridge output stages
Robust SOA	Defined DC and pulsed safe operating area up to 10 ms supports surge-tolerant power switching in solenoid drivers

Applications

Relay Driver Circuits	Linear Power Supply Pass Transistors
Use Scenario: Driving 12–24 V electromagnetic relays with coil currents up to 4 A in PLC I/O modules. IC Role / Device Role / Timing Role: High-current PNP switch sinking relay coil current to ground during activation. Use Value: V_CE(sat) ≤ −0.4 V minimizes coil voltage drop, ensuring reliable relay pull-in even at low supply margins.	Use Scenario: Series pass element in adjustable linear regulators delivering up to 3 A output current. IC Role / Device Role / Timing Role: Voltage-controlled current source regulating output by dissipating excess input-output differential. Use Value: 20 W power dissipation rating and SOA compliance allow stable operation under 15 V dropout at full load.
DC Motor Forward/Reverse Drivers	High-Side Switches in Industrial Controls
Use Scenario: Half-bridge upper-leg switch in bidirectional brushed DC motor controllers for factory automation. IC Role / Device Role / Timing Role: PNP-based high-side switch enabling direction reversal when paired with complementary 2SC3074 low-side devices. Use Value: Matched h_FE and switching timing with 2SC3074 reduces shoot-through risk and improves commutation fidelity.	Use Scenario: 24 V high-side load switch controlling solenoids, valves, or indicator lamps in DIN-rail mounted control panels. IC Role / Device Role / Timing Role: Saturated PNP switch connecting load between positive rail and switched output node. Use Value: −5 A rating and −50 V V_CEO support inductive load interruption with flyback protection up to 40 V transients.

Relay Driver Circuits

Linear Power Supply Pass Transistors

Use Scenario: Driving 12–24 V electromagnetic relays with coil currents up to 4 A in PLC I/O modules.

IC Role / Device Role / Timing Role: High-current PNP switch sinking relay coil current to ground during activation.

Use Value: V_CE(sat) ≤ −0.4 V minimizes coil voltage drop, ensuring reliable relay pull-in even at low supply margins.

Use Scenario: Series pass element in adjustable linear regulators delivering up to 3 A output current.

IC Role / Device Role / Timing Role: Voltage-controlled current source regulating output by dissipating excess input-output differential.

Use Value: 20 W power dissipation rating and SOA compliance allow stable operation under 15 V dropout at full load.

DC Motor Forward/Reverse Drivers

High-Side Switches in Industrial Controls

Use Scenario: Half-bridge upper-leg switch in bidirectional brushed DC motor controllers for factory automation.

IC Role / Device Role / Timing Role: PNP-based high-side switch enabling direction reversal when paired with complementary 2SC3074 low-side devices.

Use Value: Matched h_FE and switching timing with 2SC3074 reduces shoot-through risk and improves commutation fidelity.

Use Scenario: 24 V high-side load switch controlling solenoids, valves, or indicator lamps in DIN-rail mounted control panels.

IC Role / Device Role / Timing Role: Saturated PNP switch connecting load between positive rail and switched output node.

Use Value: −5 A rating and −50 V V_CEO support inductive load interruption with flyback protection up to 40 V transients.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP high-current switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
2SA1020-OBL	V_CEO = −80 V, I_C = −3 A, V_CE(sat) = −0.5 V (max) at −2 A	Higher voltage rating but lower current and higher saturation voltage	Preferred where transient overvoltage >60 V is expected, but not suitable for >3 A continuous loads
MJD2955G	V_CEO = −60 V, I_C = −10 A, V_CE(sat) = −1.1 V (max) at −8 A	Higher current capacity but significantly higher saturation loss	Used when peak current exceeds 5 A, accepting higher conduction loss and thermal management overhead

Compared with 2SA1244-Y(T6L1,NQ), 2SA1020-OBL trades current capability for enhanced voltage margin, while MJD2955G prioritizes peak current handling at the expense of efficiency-making 2SA1244-Y(T6L1,NQ) optimal for balanced 3–5 A, 40–50 V switching where thermal and voltage constraints coexist.

Availability

2SA1244-Y(T6L1,NQ) is available at Aetrix Electronics and suitable for relay drivers, linear power supply pass elements, and high-side industrial switches requiring stable component supply across extended production lifecycles.

Supply support for 2SA1244-Y(T6L1,NQ) 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

Toshiba Electronic Devices & Storage Corporation designs and manufactures discrete semiconductors, power devices, and logic ICs with emphasis on industrial reliability and long-term manufacturability.

The 2SA1244-Y(T6L1,NQ) belongs to Toshiba's legacy high-power bipolar transistor family, engineered specifically for robust, cost-effective switching in industrial control, power conversion, and electromechanical actuation systems.

FAQ

What is the guaranteed h_FE range for 2SA1244-Y(T6L1,NQ)?

The "Y" suffix in 2SA1244-Y(T6L1,NQ) denotes a DC current gain (h_FE) classification of 120–240 when measured at V_CE = −1 V and I_C = −1 A. This binning ensures consistent base drive requirements across production lots, critical for predictable saturation in high-volume relay driver designs using the 2SA1244-Y(T6L1,NQ).

Is 2SA1244-Y(T6L1,NQ) pin-compatible with other TO-220AB PNP transistors?

2SA1244-Y(T6L1,NQ) follows the standard TO-220AB pinout (Collector–Base–Emitter, left-to-right with tab facing outward), matching industry-standard footprints. However, electrical parameters-including h_FE, V_CE(sat), and SOA-are unique to this Toshiba part; substitution requires validation of gain, saturation voltage, and thermal limits in the target circuit before deploying 2SA1244-Y(T6L1,NQ).

Does 2SA1244-Y(T6L1,NQ) support RoHS compliance?

Yes, 2SA1244-Y(T6L1,NQ) is RoHS compliant per EU Directive 2011/65/EU, indicated by the underlined lot number marking on the device body per Toshiba's labeling convention. The "[[G]]/RoHS COMPATIBLE" designation confirms lead-free termination and restricted substance compliance, verified in Toshiba's official environmental documentation for the 2SA1244-Y(T6L1,NQ) series.

What is the maximum allowable junction temperature for 2SA1244-Y(T6L1,NQ)?

The absolute maximum junction temperature (T_j) for 2SA1244-Y(T6L1,NQ) is 150°C, as specified in Toshiba's Absolute Maximum Ratings table. Operation above this threshold risks permanent degradation of h_FE and increased leakage; thermal design must ensure T_j remains within limit under worst-case ambient and power dissipation conditions for the 2SA1244-Y(T6L1,NQ).

Can 2SA1244-Y(T6L1,NQ) be used in parallel configurations?

Parallel operation of 2SA1244-Y(T6L1,NQ) devices is not recommended without external emitter resistors or active current balancing, due to h_FE variation and thermal runaway risk. Toshiba does not characterize or guarantee matched performance between units; for higher current needs, use a single higher-rated device such as MJD2955G rather than paralleling multiple 2SA1244-Y(T6L1,NQ) units.

2SA1244-Y(T6L1,NQ) Specifications

Product attributes: Attribute value

Manufacturer:: Toshiba Semiconductor and Storage

Series:: -

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 5 A

Voltage - Collector Emitter Breakdown (Max):: 50 V

Vce Saturation (Max) @ Ib, Ic:: 400mV @ 150mA, 3A

Current - Collector Cutoff (Max):: 1µA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 70 @ 1A, 1V

Power - Max:: 1 W

Frequency - Transition:: 60MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PW-MOLD

2SA1244-Y(T6L1,NQ) FAQ

1.How can I place an order for 2SA1244-Y(T6L1,NQ) through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SA1244-Y(T6L1,NQ) 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 2SA1244-Y(T6L1,NQ) reliable?

The price and inventory of 2SA1244-Y(T6L1,NQ) are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SA1244-Y(T6L1,NQ) is usually 5 days.

3.What payment methods are accepted for 2SA1244-Y(T6L1,NQ)?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SA1244-Y(T6L1,NQ) transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SA1244-Y(T6L1,NQ)?

2SA1244-Y(T6L1,NQ) orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SA1244-Y(T6L1,NQ) 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 2SA1244-Y(T6L1,NQ)?

For technical support, including 2SA1244-Y(T6L1,NQ) datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SA1244-Y(T6L1,NQ) requirements.

6.How does Aetrix verify that 2SA1244-Y(T6L1,NQ) is sourced from the original manufacturer or authorized distributors?

All 2SA1244-Y(T6L1,NQ) 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 2SA1244-Y(T6L1,NQ) meets industry standards.

7.What is the process for return or replacement of 2SA1244-Y(T6L1,NQ)?

All 2SA1244-Y(T6L1,NQ) units undergo pre-shipment inspection (PSI). If there is an issue with 2SA1244-Y(T6L1,NQ), 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 2SA1244-Y(T6L1,NQ) part is unused and in its original packaging.

Return procedure for 2SA1244-Y(T6L1,NQ):

1.Submit a request within 90 days.

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

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