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onsemi 2SC2911S
- Part No.:
- 2SC2911S
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-225AA, TO-126-3
- Datasheet:
-
2SC2911S.pdf
- Description:
- TRANS NPN 160V 0.14A TO-126
- Quantity:
- Payment:
- Shipping:
Inventory:9,690
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Product details
Overview
2SC2911S from SANYO Semiconductor is an NPN epitaxial planar silicon transistor designed for high-voltage switching and AF 100W predriver applications. It features a collector-to-emitter voltage rating of 160 V, continuous collector current of 140 mA, DC current gain (hFE) of 100–400 at IC = 10 mA, gain-bandwidth product (fT) of 150 MHz, and output capacitance (Cob) of 3.0 pF at VCB = −10 V.
For engineers reviewing the 2SC2911S datasheet, pinout, applications, or equivalent options, key selection criteria include its high breakdown voltage (VCBO = 180 V), fast switching times (ton = 0.1 µs, tf = 0.1 µs), low saturation voltage (VCE(sat) = 0.07 V typ at IC/IB = 10), and TO-126 package suitability for medium-power linear and switching stages.
Technical Context
The 2SC2911S employs FBET (Flat Base Epitaxial Transistor) process technology to achieve high breakdown voltage and good hFE linearity across operating current. Its low Cob and high fT support stable high-frequency amplification up to ~150 MHz in predriver configurations.
Designed for single-ended or push-pull AF output stages, it operates with VCE up to 160 V and delivers reliable switching performance under pulse conditions (ICP = 200 mA). Thermal design must account for PC = 1.0 W at Ta = 25°C (10 W at Tc = 25°C), requiring appropriate heatsinking in sustained operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO | 180 V - Enables use in high-side switch or flyback snubber circuits with ≥150 V bus rails. |
| VCEO | 160 V - Supports direct connection to 100–120 VAC-derived DC supplies after rectification and filtering. |
| IC (continuous) | 140 mA - Suitable for driving small-signal power devices (e.g., MOSFET gates or driver transistors) in audio or SMPS control paths. |
| fT | 150 MHz - Ensures adequate bandwidth for wideband AF amplification and fast-switching control signals. |
| Cob | 3.0 pF @ VCB = −10 V - Minimizes Miller effect distortion in high-gain common-emitter amplifier stages. |
| VCE(sat) | 0.07 V (typ) @ IC = 50 mA, IB = 5 mA - Reduces conduction loss and self-heating in saturated switching applications. |
| hFE | 100–400 @ VCE = 5 V, IC = 10 mA - Provides predictable bias stability across production lots for fixed-bias or emitter-degenerated designs. |
Pinout & Package
2SC2911S is housed in a TO-126 molded plastic package with standard lead configuration: Emitter (Pin 1), Collector (Pin 2), Base (Pin 3). The collector tab is electrically connected to Pin 2 and serves as the primary thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal | Connected to ground or low-impedance return path; polarity defines NPN operation. |
| 2 (Collector) | High-voltage output node | Electrically tied to metal tab; requires isolation from heatsink unless referenced to same potential. |
| 3 (Base) | Control input | Receives forward-biased drive current; small-signal impedance ~kΩ range at typical bias points. |
Key Features
| Feature | Design Value |
|---|---|
| FBET process technology | Enables tight hFE distribution and reduced Cob variation across temperature and voltage. |
| High VCBO (180 V) | Permits safe operation in 100–120 VAC line-powered equipment with margin against transients. |
| Fast switching (ton/tf = 0.1 µs) | Supports clean square-wave drive in Class-A/B audio output stages and PWM control circuits. |
| Low VCE(sat) (0.07 V typ) | Lowers power dissipation in saturated mode, improving efficiency and thermal headroom in compact layouts. |
| TO-126 mechanical robustness | Offers higher power handling than TO-92 while maintaining through-hole manufacturability and serviceability. |
Applications
| Audio Power Amplifier Predriver | Switch-Mode Power Supply Gate Driver |
|---|---|
Use Scenario: Driving complementary output transistors in discrete Class-AB audio amplifiers delivering up to 100 W into 8 Ω loads. IC Role / Device Role / Timing Role: NPN predriver stage providing current gain and voltage swing to fully saturate/fall output devices. Use Value: High fT and low Cob ensure minimal phase shift and overshoot at audio frequencies; 160 V VCEO accommodates rail voltages up to ±80 V. | Use Scenario: Level-shifting and current boosting for MOSFET gate drive in offline AC/DC converters operating at 65–100 kHz. IC Role / Device Role / Timing Role: Low-side NPN switch controlling gate charge/discharge path to reduce switching losses. Use Value: Fast ton/tf and low VCE(sat) minimize transition time and conduction loss during gate charging cycles. |
| High-Voltage Linear Regulator Pass Element | Industrial Relay Driver Interface |
Use Scenario: Series pass transistor in adjustable linear regulators powering sensitive analog circuitry from unregulated 120–160 VDC supplies. IC Role / Device Role / Timing Role: Voltage-controlled current source regulating output by dissipating excess input-output differential. Use Value: 160 V VCEO and 1.0 W ambient-rated dissipation allow stable regulation without cascading or active cooling. | Use Scenario: Isolating and amplifying microcontroller GPIO outputs to energize 24–48 VDC industrial relays with coil currents up to 120 mA. IC Role / Device Role / Timing Role: Saturated switch interfacing logic-level control with inductive load. Use Value: 140 mA IC rating and robust SOA support relay coil surge currents; TO-126 facilitates manual replacement in field-serviceable panels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN high-voltage switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 2SC3838 | Higher VCEO (200 V), lower fT (100 MHz), same TO-126 package and pinout. | Better suited for >180 V transient-prone environments but less optimal for wideband AF stages. | Select when absolute breakdown margin outweighs bandwidth requirements. |
| MJD112 | Lower VCEO (100 V), higher IC (2 A), TO-220 package, different pinout (E-C-B). | Requires PCB layout change; intended for higher-current switching, not precision predriving. | Choose only if system voltage ≤80 V and thermal management supports TO-220 footprint. |
Compared with 2SC2911S, 2SC3838 offers enhanced voltage safety margin at the cost of bandwidth, while MJD112 trades voltage capability for current capacity and demands mechanical redesign-neither is pin-compatible, and both require functional validation in target circuit topologies.
Availability
2SC2911S is available at Aetrix Electronics and suitable for audio power amplifiers, switch-mode power supply gate drivers, high-voltage linear regulators, and industrial relay interfaces requiring stable component supply and long-term obsolescence resilience.
Supply support for 2SC2911S 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
SANYO Semiconductor was a Japanese semiconductor manufacturer specializing in analog, power, and discrete devices before its acquisition by ON Semiconductor in 2011. Known for high-reliability bipolar transistors and optoelectronics.
The 2SC2911S belongs to SANYO's legacy high-voltage NPN transistor family targeting discrete audio and industrial power control applications where ruggedness, predictable gain, and thermal stability are critical.
FAQ
What is the maximum collector-emitter voltage rating for the 2SC2911S?
The 2SC2911S has a maximum collector-to-emitter voltage (VCEO) rating of 160 V at Ta = 25°C. This rating applies under continuous DC operation and defines the upper limit for safe voltage swing between collector and emitter terminals without risk of avalanche breakdown. Exceeding this value-even momentarily-may cause irreversible device failure. Derating is recommended above 25°C ambient per the PC vs. Ta curve in the datasheet.
Does the 2SC2911S have a documented pinout compatible with standard TO-126 packages?
Yes, the 2SC2911S uses the industry-standard TO-126 package with confirmed pinout: Pin 1 = Emitter, Pin 2 = Collector (connected to metal tab), Pin 3 = Base. This matches JEDEC TO-126 mechanical specifications and is consistent across SANYO's 2SA1209/2SC2911 family. No adapter or footprint modification is needed when replacing other TO-126 NPN transistors with identical pin assignment.
Can the 2SC2911S be used in linear amplifier applications?
Yes, the 2SC2911S is explicitly specified for AF 100W predriver applications and exhibits good hFE linearity and low Cob-key traits for low-distortion linear amplification. Its fT of 150 MHz and VCE(sat) of 0.07 V support stable Class-A/B operation up to mid-audio frequencies. Thermal design must respect PC = 1.0 W at Ta = 25°C, and derating is required above that temperature.
What is the typical DC current gain (hFE) range for the 2SC2911S at 10 mA collector current?
The 2SC2911S is binned into three hFE ranks (R/S/T) with minimum–maximum ranges spanning 100–400 at VCE = 5 V and IC = 10 mA. Typical hFE falls near the center of each rank-for example, Rank S (140–280) typically measures ~210. Designers should select based on required bias stability and verify gain spread within their specific operating point using the hFE vs. IC curves in the datasheet.
Is the 2SC2911S still in active production or supported by ON Semiconductor?
The 2SC2911S is a legacy SANYO part discontinued after the 2011 acquisition. ON Semiconductor does not list it in active production or offer replacement cross-references. However, Aetrix Electronics maintains verified legacy stock with full traceability and supports long-term supply for industrial and repair applications where form-fit-function compatibility is essential.
2SC2911S Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-225AA, TO-126-3
- Packaging:
- Bulk
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 140 mA
- Voltage - Collector Emitter Breakdown (Max):
- 160 V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 5mA, 50mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 140 @ 10mA, 5V
- Power - Max:
- 1 W
- Frequency - Transition:
- 150MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-126
2SC2911S FAQ
1.How can I place an order for 2SC2911S through Aetrix?
Please submit a Request for Quotation (RFQ) for 2SC2911S 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 2SC2911S reliable?
The price and inventory of 2SC2911S are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SC2911S is usually 5 days.
3.What payment methods are accepted for 2SC2911S?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SC2911S transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 2SC2911S?
2SC2911S orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 2SC2911S 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 2SC2911S?
For technical support, including 2SC2911S datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SC2911S requirements.
6.How does Aetrix verify that 2SC2911S is sourced from the original manufacturer or authorized distributors?
All 2SC2911S 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 2SC2911S meets industry standards.
7.What is the process for return or replacement of 2SC2911S?
All 2SC2911S units undergo pre-shipment inspection (PSI). If there is an issue with 2SC2911S, 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 2SC2911S part is unused and in its original packaging.
Return procedure for 2SC2911S:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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