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Toshiba Semiconductor and Storage 2SA2059(TE12L,F)
- Part No.:
- 2SA2059(TE12L,F)
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
2SA2059(TE12L,F).pdf
- Description:
- TRANS PNP 20V 3A PW-MINI
- Quantity:
- Payment:
- Shipping:
Inventory:769
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Product details
Overview
2SA2059(TE12L,F) from TOSHIBA is a silicon PNP epitaxial transistor designed for high-speed switching in DC-DC converters, strobe circuits, and pulse applications. It delivers hFE = 200–500 at IC = −0.5 A, VCE(sat) ≤ −0.19 V at IC = −1.6 A/IB = −53 mA, and tf = 40 ns (typ.), enabling efficient low-loss switching in compact power stages.
For engineers reviewing the 2SA2059(TE12L,F) datasheet, 2SA2059(TE12L,F) pinout, 2SA2059(TE12L,F) application, or 2SA2059(TE12L,F) equivalent, key selection criteria include guaranteed VCEO = −20 V, JEITA SC-62 package compatibility, RoHS-compliant marking, safe operating area under pulsed conditions, and thermal derating guidance for FR4-mounted designs.
Technical Context
This PNP bipolar junction transistor operates in common-emitter configuration with fixed gain-bandwidth trade-offs optimized for fast turn-off. Its epitaxial base structure minimizes minority-carrier storage time, supporting reliable operation up to 100 kHz switching frequencies in non-repetitive pulse mode.
Designed for discrete switching rather than linear amplification, it features tightly specified VBE(sat) = −1.10 V max and Cob = 28 pF at VCB = −10 V, ensuring predictable drive requirements and minimal Miller-effect delay in gate-drive or strobe-output stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −20 V: Maximum allowable collector-emitter voltage before breakdown in open-base condition |
| hFE (IC = −0.5 A) | 200–500: Sufficient DC current gain to support low-base-drive designs in medium-power switches |
| VCE(sat) (IC = −1.6 A) | ≤ −0.19 V: Low saturation voltage reduces conduction loss and self-heating during on-state |
| tf (switching) | 40 ns typ.: Enables sub-100 ns total switching transitions in properly biased circuits |
| Cob | 28 pF typ. at VCB = −10 V: Predictable output capacitance for snubber and timing calculations |
| Pc (FR4, 10 s) | 2.5 W: Power dissipation limit defined for standard PCB mounting per JEITA SC-62 footprint |
| Tj(max) | 150 °C: Junction temperature ceiling requiring thermal design margin below ambient + θJA × Pc |
Pinout & Package
Package: JEITA SC-62 (TOSHIBA 2-5K1A), surface-mount, 3-pin, 0.05 g typical weight, compatible with reflow soldering per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current sink terminal | Connected to ground or low-side return path; carries full load current in high-side switch topology |
| Base (B) | Control input | Receives negative drive current to forward-bias BE junction; requires IB ≥ −53 mA for specified VCE(sat) |
| Collector (C) | High-side output node | Connected to load supply rail (e.g., −12 V in strobe test circuit); reverse-biased during off-state |
Key Features
| Feature | Design Value |
|---|---|
| High DC current gain | hFE = 200–500 at IC = −0.5 A enables reduced base drive circuit complexity and lower driver power consumption |
| Low VCE(sat) | ≤ −0.19 V at rated current minimizes I²R losses and thermal stress in continuous or pulsed conduction |
| Fast fall time | tf = 40 ns (typ.) supports high-frequency switching without excessive switching loss penalties |
| Controlled Cob | 28 pF output capacitance ensures stable timing behavior and predictable rise/fall asymmetry in pulse circuits |
| JEITA SC-62 package | Standardized footprint allows drop-in replacement in legacy designs and simplifies PCB layout reuse |
Applications
| DC-DC Converter Switch | Camera Strobe Driver |
|---|---|
Use Scenario: Used as main switching transistor in non-synchronous buck or flyback converter topologies operating at ≤100 kHz. IC Role / Device Role: High-side PNP switch controlling energy transfer from input to output inductor/capacitor network. Use Value: Low VCE(sat) and fast tf reduce conduction and switching losses, improving efficiency in portable power supplies. | Use Scenario: Drives xenon flash tube in digital camera modules requiring precise high-current pulses. IC Role / Device Role: Fast-turn-on/off PNP switch delivering >1.6 A peak current into low-impedance strobe load. Use Value: Guaranteed tf ≤ 40 ns and robust SOA enable repeatable microsecond-scale flash timing with minimal tail current. |
| Industrial Pulse Generator | LED Current Sink Control |
Use Scenario: Generates calibrated current pulses for sensor excitation or test signal generation in factory automation equipment. IC Role / Device Role: Precision-switched current source using emitter-follower configuration with controlled hFE spread. Use Value: Tight hFE range (200–500) and low VBE(sat) variation ensure consistent pulse amplitude across production units. | Use Scenario: Sinks current from high-brightness LED strings in signage or backlighting where thermal management is constrained. IC Role / Device Role: Medium-power PNP current switch placed between LED anode and regulated supply rail. Use Value: 2.5 W FR4-rated power dissipation and 150 °C Tj(max) support sustained operation in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP switching transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 2SA1774(TE12L,F) | VCEO = −50 V, hFE = 120–270, tf = 100 ns (typ.) | Higher voltage rating but slower switching; suitable for general-purpose switching where speed is secondary | Select when higher breakdown margin is required and switching frequency < 50 kHz |
| BC807-40,215 | SOT-23 package, VCEO = −45 V, hFE = 250–630, tf = 100 ns (typ.) | Smaller footprint and higher hFE, but lower power rating (0.3 W) and no FR4-derated SOA data | Select for space-constrained low-power designs where thermal mass is managed externally |
Compared with 2SA2059(TE12L,F), the 2SA1774 offers greater voltage headroom at the cost of speed, while the BC807-40 provides higher gain in a miniature package but lacks the 2.5 W pulsed capability and documented FR4 thermal performance - making 2SA2059(TE12L,F) optimal for medium-power, thermally anchored strobe and converter switches.
Availability
2SA2059(TE12L,F) is available at Aetrix Electronics and suitable for DC-DC converter design, camera strobe development, and industrial pulse generator applications requiring stable component supply and long-term manufacturability.
Supply support for 2SA2059(TE12L,F) 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 is a Japanese semiconductor manufacturer specializing in discrete devices, power ICs, and memory solutions with global distribution and automotive-grade qualification capabilities.
The 2SA2059 belongs to Toshiba's general-purpose bipolar transistor product line, engineered for reliability in high-speed switching applications where consistent gain, low saturation voltage, and JEDEC-standard packaging are critical.
FAQ
What is the maximum continuous collector current for 2SA2059(TE12L,F) at 25°C?
The maximum continuous collector current for 2SA2059(TE12L,F) is −3.0 A at Ta = 25°C when mounted on an FR4 board (1.6 mm thick, 645 mm² copper area). This rating assumes proper thermal management and derating above 25°C per the device's thermal resistance curve. Exceeding this value risks thermal runaway or accelerated degradation. Always verify actual board layout and ambient conditions before final design validation.
Does 2SA2059(TE12L,F) meet RoHS requirements?
Yes, 2SA2059(TE12L,F) is RoHS compliant. The marking includes [[G]]/RoHS COMPATIBLE or [[G]]/RoHS [[Pb]] depending on the lot, as indicated by the presence or absence of a line next to the Lot No. on the package. Full compliance documentation and material declarations are available through Toshiba's official environmental reports and can be requested via authorized distributors or Toshiba sales representatives.
What is the safe operating area (SOA) limitation for 2SA2059(TE12L,F) in pulsed operation?
The 2SA2059(TE12L,F) SOA is defined for single non-repetitive pulses up to 100 ms on FR4 boards. At VCE = −12 V, the maximum pulsed collector current is −5.0 A for pulse widths ≤ 10 μs, decreasing to −1.0 A at 10 ms. These limits assume Ta = 25°C and must be linearly derated above that temperature. Refer to Figure 4 in the official Toshiba datasheet for full SOA curves.
Can 2SA2059(TE12L,F) be used in linear amplifier configurations?
While 2SA2059(TE12L,F) exhibits usable hFE across its operating range, it is not characterized or optimized for linear amplification. Toshiba specifies parameters only for switching applications - including VCE(sat), tf, and SOA - and does not provide small-signal parameters like fT or noise figure. For analog gain stages, select transistors explicitly rated for linear operation with published AC characteristics.
What is the recommended base drive for achieving specified VCE(sat) in 2SA2059(TE12L,F)?
To achieve VCE(sat) ≤ −0.19 V, the 2SA2059(TE12L,F) requires IB = −53 mA at IC = −1.6 A, corresponding to a forced beta (IC/IB) of ~30. Base drive must be capable of sinking this current rapidly during turn-on and removing stored charge during turn-off. A dedicated negative-current driver or active pull-down stage is recommended to maintain fast switching performance.
2SA2059(TE12L,F) Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 3 A
- Voltage - Collector Emitter Breakdown (Max):
- 20 V
- Vce Saturation (Max) @ Ib, Ic:
- 190mV @ 53mA, 1.6A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 200 @ 500mA, 2V
- Power - Max:
- 1 W
- Frequency - Transition:
- -
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PW-MINI
2SA2059(TE12L,F) FAQ
1.How can I place an order for 2SA2059(TE12L,F) through Aetrix?
Please submit a Request for Quotation (RFQ) for 2SA2059(TE12L,F) 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 2SA2059(TE12L,F) reliable?
The price and inventory of 2SA2059(TE12L,F) are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SA2059(TE12L,F) is usually 5 days.
3.What payment methods are accepted for 2SA2059(TE12L,F)?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SA2059(TE12L,F) transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 2SA2059(TE12L,F)?
2SA2059(TE12L,F) orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 2SA2059(TE12L,F) 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 2SA2059(TE12L,F)?
For technical support, including 2SA2059(TE12L,F) datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SA2059(TE12L,F) requirements.
6.How does Aetrix verify that 2SA2059(TE12L,F) is sourced from the original manufacturer or authorized distributors?
All 2SA2059(TE12L,F) 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 2SA2059(TE12L,F) meets industry standards.
7.What is the process for return or replacement of 2SA2059(TE12L,F)?
All 2SA2059(TE12L,F) units undergo pre-shipment inspection (PSI). If there is an issue with 2SA2059(TE12L,F), 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 2SA2059(TE12L,F) part is unused and in its original packaging.
Return procedure for 2SA2059(TE12L,F):
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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