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onsemi 2SA1768S-AN
- Part No.:
- 2SA1768S-AN
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- SC-71
- Datasheet:
-
2SA1768S-AN.pdf
- Description:
- TRANS PNP 160V 0.7A 3-NMP
- Quantity:
- Payment:
- Shipping:
Inventory:8,026
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Product details
Overview
2SA1768S-AN from onsemi is a PNP bipolar junction transistor (BJT) designed for high-voltage switching in horizontal deflection and power conversion circuits. It features –180 V VCBO, –160 V VCEO, –0.7 A continuous IC, 1 W PC, and fast switching with ton = 60 ns and tf = 60 ns - enabling use in color TV horizontal output stages.
For engineers reviewing the 2SA1768S-AN datasheet, pinout, applications, or equivalent options, key selection criteria include breakdown voltage margin, saturation voltage at high current, thermal derating above 25°C, and SC-71 (NMP) package compatibility with wave-soldered CRT deflection assemblies.
Technical Context
This device is a single PNP BJT fabricated using onsemi's MBIT process, optimized for high-voltage, medium-current linear and switching operation. Its –160 V V(BR)CEO and –180 V V(BR)CBO support robust operation in flyback and line-output transformer drive circuits where transient overvoltage is common.
With hFE ranging 140–280 (Rank S), fT = 120 MHz, and low VCE(sat) = –0.2 V (typ) at IC = –250 mA/IB = –25 mA, the 2SA1768S-AN delivers stable gain and rapid turn-off (tstg = 900 ns) critical for horizontal scanning timing integrity and efficiency in analog TV power stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO | –180 V - Withstands collector-base transients up to –180 V without avalanche conduction, essential for horizontal deflection flyback recovery. |
| VCEO | –160 V - Maximum safe collector-emitter voltage under open-base conditions; defines usable swing in line-output stage design. |
| IC (cont.) | –0.7 A - Continuous DC collector current rating; supports sustained horizontal scan current in CRT driver applications. |
| VCE(sat) | –0.2 V (typ) at IC = –250 mA/IB = –25 mA - Low saturation voltage minimizes conduction loss and heat generation during active switching. |
| fT | 120 MHz - Gain-bandwidth product enabling stable high-frequency switching up to ~10–15 MHz fundamental, suitable for 15.734 kHz horizontal sync with harmonic margin. |
| ton / tf | 60 ns / 60 ns - Fast turn-on and fall times reduce switching transition losses and EMI in high-dV/dt horizontal output circuits. |
| Tj max | 150 °C - Maximum junction temperature; requires thermal design to maintain <150 °C under 1 W dissipation in NMP package at Ta ≤ 75 °C. |
Pinout & Package
Package: SC-71 (JEITA/IEC standard), also designated NMP (Taping) - surface-mount, 3-terminal, plastic-molded package with 0.275 g mass and 2.54 mm lead pitch. Dimensions: 4.5 × 2.5 × 1.45 mm (L × W × H), compatible with automated pick-and-place and reflow/wave soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter | Current sink terminal; connected to ground or low-side return path in common-emitter switching configuration. |
| 2 | Collector | High-voltage output node; tied to horizontal deflection coil primary or flyback transformer input. |
| 3 | Base | Control input; driven by pulse transformer or driver IC to switch collector current with defined IB ratio (e.g., IC/IB = 10). |
Key Features
| Feature | Design Value |
|---|---|
| MBIT process technology | Enables high breakdown voltage and tight hFE distribution (Rank S: 140–280) while maintaining low VCE(sat) and consistent switching speed. |
| High V(BR)CBO | –180 V rating allows safe operation in CRT horizontal output circuits exposed to >150 V flyback spikes without clamping or snubbing overhead. |
| Low VCE(sat) | –0.2 V typical at –250 mA reduces power loss to <62.5 mW in saturation, easing thermal management in compact TV chassis layouts. |
| Fast switching | 60 ns turn-on + 60 ns fall time enables clean square-wave drive of deflection coils with minimal overshoot and reduced RFI generation. |
Applications
| Color TV Horizontal Output Stage | DC–DC Converter Switch |
|---|---|
Use Scenario: Driving horizontal deflection yoke and flyback transformer in analog CRT television sets. IC Role / Device Role / Timing Role: Main switching transistor in self-oscillating or synchronized horizontal output stage; conducts full scan-line current (~0.5 A peak) at 15.734 kHz. Use Value: High VCEO (–160 V) and fast tf (60 ns) ensure reliable flyback energy transfer and minimal dead-time loss during retrace. | Use Scenario: High-voltage switching element in offline AC–DC converters or isolated DC–DC inverters. IC Role / Device Role / Timing Role: Primary-side switch controlling energy storage in transformer primary; operated in hard-switched PWM mode below 100 kHz. Use Value: –180 V VCBO withstands reflected transients from transformer leakage inductance, reducing need for external clamping. |
| Inverter Power Stage | Line-Voltage Regulator Pass Element |
Use Scenario: Push-pull or single-ended inverter for backlight CCFL or auxiliary low-power AC generation. IC Role / Device Role / Timing Role: Medium-power PNP switch in inverter half-bridge; handles bidirectional current during resonant transitions. Use Value: High ICP (–1.5 A pulse) supports short-duration surge currents during startup or load transients without second breakdown. | Use Scenario: Series pass transistor in high-input-voltage linear regulators for legacy industrial control modules. IC Role / Device Role / Timing Role: Voltage-controlled current source regulating output against varying load; biased in active region, not saturated. Use Value: Stable hFE (140–280) and low ICBO (<–0.1 μA) ensure predictable regulation accuracy and low quiescent drift over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP high-voltage switching transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 2SA1943 | Higher VCEO (–230 V), higher PC (15 W), TO-3P package - larger footprint and thermal mass. | Used in audio power amplifiers and higher-power SMPS; not drop-in due to different package and pinout. | Select when >1 W continuous dissipation or >–200 V breakdown is required; requires PCB redesign. |
| MJD2955T4G | Lower VCEO (–60 V), TO-252 package, hFE 20–70 - optimized for general-purpose medium-power switching, not high-voltage flyback. | Suitable for 24–48 V DC–DC converters and motor drivers; insufficient for CRT horizontal output. | Choose only for low-voltage, high-current linear/switching roles; not a functional substitute for 2SA1768S-AN in TV deflection. |
Compared with 2SA1768S-AN, 2SA1943 offers greater voltage headroom and thermal capacity but demands mechanical redesign, while MJD2955T4G lacks the voltage rating and gain consistency needed for CRT horizontal output - making neither a direct replacement, but both useful in adjacent voltage/current operating zones.
Availability
2SA1768S-AN is available at Aetrix Electronics and suitable for color TV repair, legacy CRT equipment maintenance, and industrial inverter refurbishment requiring stable component supply and long-lifecycle sourcing.
Supply support for 2SA1768S-AN 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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.
The 2SA1768S-AN belongs to onsemi's legacy high-voltage bipolar transistor family, engineered specifically for reliability-critical horizontal deflection and power conversion in analog video systems and industrial power supplies.
FAQ
What is the maximum continuous collector current rating for the 2SA1768S-AN?
The 2SA1768S-AN has a maximum continuous collector current (IC) rating of –0.7 A at Ta = 25°C. Derating is required above 25°C per the PC–Ta curve; at 75°C ambient, usable IC drops to approximately –0.4 A to maintain junction temperature ≤150°C. This rating ensures safe operation in sustained horizontal scan current paths without thermal runaway.
Does the 2SA1768S-AN have a specified gain-bandwidth product (fT)?
Yes, the 2SA1768S-AN has a guaranteed minimum fT of 120 MHz at VCE = –10 V and IC = –50 mA. This high fT supports stable high-frequency switching performance in CRT horizontal output stages and resonant converter topologies where bandwidth beyond fundamental switching frequency is critical for waveform fidelity.
What is the pin configuration and package type of the 2SA1768S-AN?
2SA1768S-AN uses the SC-71 (JEITA) / NMP (onsemi) surface-mount package with three terminals: Pin 1 = Emitter, Pin 2 = Collector, Pin 3 = Base. The package measures 4.5 × 2.5 × 1.45 mm and is supplied in tape-and-reel format (2,500 pcs./box), optimized for automated assembly in consumer electronics manufacturing lines.
How does the 2SA1768S-AN differ from the 2SA1768T-AN variant?
The 2SA1768S-AN and 2SA1768T-AN share identical electrical specifications and package, differing only in hFE ranking: S-grade has hFE = 140–280, while T-grade is 200–400. Both meet the same VCEO, VCBO, and switching time specs. Designers select S-grade for cost-sensitive applications where mid-range gain suffices; T-grade is preferred when tighter high-current gain consistency is required.
Is the 2SA1768S-AN RoHS compliant and lead-free?
Yes, the 2SA1768S-AN is Pb-free and RoHS compliant, as confirmed by its "Pb Free" marking in the ordering information and compliance documentation referenced in the onsemi datasheet (Ordering Number EN3582A). It meets JEDEC J-STD-609 Category 1a for lead-free terminations and is suitable for modern environmentally regulated production environments.
2SA1768S-AN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-71
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 700 mA
- Voltage - Collector Emitter Breakdown (Max):
- 160 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 25mA, 250mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 100mA, 5V
- Power - Max:
- 1 W
- Frequency - Transition:
- 120MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 3-NMP
2SA1768S-AN FAQ
1.How can I place an order for 2SA1768S-AN through Aetrix?
Please submit a Request for Quotation (RFQ) for 2SA1768S-AN 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 2SA1768S-AN reliable?
The price and inventory of 2SA1768S-AN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SA1768S-AN is usually 5 days.
3.What payment methods are accepted for 2SA1768S-AN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SA1768S-AN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 2SA1768S-AN?
2SA1768S-AN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 2SA1768S-AN 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 2SA1768S-AN?
For technical support, including 2SA1768S-AN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SA1768S-AN requirements.
6.How does Aetrix verify that 2SA1768S-AN is sourced from the original manufacturer or authorized distributors?
All 2SA1768S-AN 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 2SA1768S-AN meets industry standards.
7.What is the process for return or replacement of 2SA1768S-AN?
All 2SA1768S-AN units undergo pre-shipment inspection (PSI). If there is an issue with 2SA1768S-AN, 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 2SA1768S-AN part is unused and in its original packaging.
Return procedure for 2SA1768S-AN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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