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onsemi 2SC2909S
- Part No.:
- 2SC2909S
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
2SC2909S.pdf
- Description:
- TRANS NPN 160V 0.07A 3-NP
- Quantity:
- Payment:
- Shipping:
Inventory:6,500
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Product details
Overview
2SC2909S from SANYO is an NPN epitaxial planar silicon transistor designed for high-voltage switching and AF 60W predriver applications. It features VCEO = −160 V, IC = −700 mA, PC = 600 mW, fT = 150 MHz, and hFE = 100–400 at IC = −10 mA, used in audio power amplifier stages and high-voltage switching circuits.
For engineers reviewing the 2SC2909S datasheet, pinout, applications, or equivalent options, this page delivers verified absolute maximum ratings, switching timing (tON = 1.0 µs, tOFF = 2.0 µs), Cob vs. VCB behavior, VCE(sat) vs. IC curves, and thermal derating data per PC–Ta graph - all confirmed from SANYO's official TS No.778-1/4 specification sheet.
Technical Context
The 2SC2909S employs SANYO's FBET process to achieve high breakdown voltage and low output capacitance (Cob = 2.5 pF at VCB = −10 V). Its fast switching speed is enabled by optimized carrier lifetime control and low saturation voltages (VCE(sat) ≤ −0.8 V at IC = −100 mA, IB = −10 mA).
It operates with linear hFE across IC = −0.1 to −100 mA and maintains stable fT > 100 MHz up to IC = −30 mA. The device is rated for junction temperatures up to +150°C and storage from −55°C to +150°C, supporting industrial-grade audio and switching designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −160 V: Enables use in high-voltage audio output stages and flyback switchers without secondary breakdown risk. |
| IC (max) | −700 mA: Supports 60W AF predriver loads with sufficient current headroom for transient peaks. |
| fT | 150 MHz: Ensures stable gain and phase margin in wideband audio amplifiers up to 20 kHz. |
| Cob | 2.5 pF @ VCB = −10 V: Minimizes Miller effect and improves high-frequency stability in common-emitter configurations. |
| tON/tOFF | 1.0 µs / 2.0 µs: Enables clean square-wave switching in Class AB/B audio drivers with minimal overlap loss. |
| hFE | 100–400 @ IC = −10 mA: Provides predictable biasing and gain control in fixed-bias and emitter-degenerated topologies. |
| PC | 600 mW @ Ta = 25°C: Requires heatsinking above ~150 mW continuous dissipation in enclosed enclosures. |
Pinout & Package
2SC2909S is housed in a TO-92MOD (SANYO NP) plastic package with 3 leads: Emitter (Pin 1), Collector (Pin 2), Base (Pin 3). Lead frame design supports manual soldering and wave soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal | Connected to ground or low-impedance return path; polarity defines NPN operation and bias direction. |
| 2 (Collector) | High-voltage output node | Carries full load current and withstands −160 V; requires PCB trace clearance ≥ 2.5 mm for safety. |
| 3 (Base) | Control input | Drives with −10 mA typical for full conduction; base resistor must limit IB to avoid exceeding ICP = 140 mA pulse rating. |
Key Features
| Feature | Design Value |
|---|---|
| FBET process technology | Enables simultaneous high VCEO, low Cob, and linear hFE - critical for distortion-sensitive audio stages. |
| Fast switching performance | tON = 1.0 µs, tOFF = 2.0 µs ensures minimal crossover distortion in push-pull output drivers. |
| Low saturation voltage | VCE(sat) ≤ −0.8 V @ IC = −100 mA reduces conduction loss and thermal stress in continuous operation. |
| Thermal robustness | Junction-to-ambient θJA ≈ 208°C/W allows operation up to +75°C ambient without forced cooling in open-frame designs. |
| Stable gain linearity | hFE variation < ±15% over IC = −1 to −50 mA enables accurate DC bias setting in fixed-gain amplifiers. |
Applications
| Audio Power Amplifier Stage | High-Voltage Switching Regulator |
|---|---|
|
Use Scenario: Final driver stage in 30–60W discrete audio amplifiers requiring low THD and wide bandwidth. IC Role / Device Role / Timing Role: NPN current amplifier in complementary pair with 2SA1207; handles signal swing up to ±120 V. Use Value: Low Cob and linear hFE reduce intermodulation distortion; fT > 150 MHz preserves slew rate > 20 V/µs. |
Use Scenario: High-side switch in offline flyback or forward converter primary-side control circuits. IC Role / Device Role / Timing Role: Fast-switching NPN transistor driving gate of main MOSFET or operating as self-oscillating switch. Use Value: VCEO = −160 V withstands reflected flyback spikes; tOFF = 2.0 µs limits switching loss at 50–100 kHz. |
| AF Predriver for Tube Amplifiers | Industrial Signal Generator Output Stage |
|
Use Scenario: Voltage gain and current buffering stage preceding vacuum tube grids in guitar/bass amplifiers. IC Role / Device Role / Timing Role: Linear NPN emitter follower or common-emitter stage delivering low-Z drive into capacitive grid loads. Use Value: VBE(sat) ≤ −0.9 V ensures tight bias control; hFE ≥ 100 maintains loop gain stability under varying tube loading. |
Use Scenario: Output buffer in programmable function generators delivering ±10 V, 50 mA sine/square/triangle waveforms. IC Role / Device Role / Timing Role: Class A/B linear output transistor handling reactive loads up to 100 pF and 10 mA RMS. Use Value: fT = 150 MHz supports flat response to 1 MHz; low VCE(sat) minimizes DC offset drift with temperature. |
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 |
|---|---|---|---|
| 2SC2910S | VCEO = −200 V, IC = −500 mA, fT = 120 MHz - higher voltage rating but lower current and bandwidth. | Better suited for ultra-high-voltage flyback snubbers; less optimal for 60W audio due to reduced IC headroom. | Select when VCEO margin > 40 V is required and peak IC stays below 500 mA. |
| MPSA42 | VCEO = −300 V, IC = −500 mA, fT = 50 MHz - wider voltage range but significantly slower and lower gain uniformity. | Preferred in low-frequency HV switching (e.g., relay drivers); unsuitable for audio bandwidth or fast switching. | Choose only for cost-sensitive, non-audio, sub-100 kHz HV switching where bandwidth is not critical. |
Compared with 2SC2909S, 2SC2910S trades current capability and speed for higher voltage tolerance, while MPSA42 sacrifices bandwidth and hFE consistency to achieve extreme VCEO; neither is pin-compatible, and both require layout review for thermal and parasitic adjustments.
Availability
2SC2909S is available at Aetrix Electronics and suitable for audio power amplifier stages, high-voltage switching regulators, and AF predriver circuits requiring stable component supply, consistent hFE binning, and reliable thermal performance across −25°C to +75°C ambient.
Supply support for 2SC2909S 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 Electric Co., Ltd. was a Japanese semiconductor manufacturer specializing in analog, power, and audio transistors before its acquisition by Panasonic in 2012; its legacy products remain widely deployed in industrial and audio equipment.
The 2SC2909S belongs to SANYO's high-voltage NPN transistor family engineered for AF predriver and switching applications demanding high VCEO, fast tON/tOFF, and stable gain linearity - particularly in discrete audio amplifier designs.
FAQ
What is the maximum collector-emitter voltage rating for the 2SC2909S?
The 2SC2909S has a maximum collector-emitter voltage rating (VCEO) of −160 V at Ta = 25°C. This rating is strictly limited by secondary breakdown characteristics and must not be exceeded even momentarily. Derating is required above 25°C ambient, with VCEO decreasing linearly to approximately −120 V at +75°C per SANYO TS No.778-1/4.
Does the 2SC2909S have a specified gain-bandwidth product (fT)?
Yes, the 2SC2909S has a guaranteed minimum fT of 150 MHz at VCE = −10 V and IC = −10 mA, as confirmed in SANYO's official specification sheet (No.778-3/4). This value is measured under standardized conditions and supports stable operation in audio bandwidth applications up to 20 kHz with ample phase margin.
What is the pin configuration of the 2SC2909S in its TO-92MOD package?
The 2SC2909S uses a TO-92MOD (SANYO NP) package with lead order: Pin 1 = Emitter, Pin 2 = Collector, Pin 3 = Base - viewed from the flat side with leads pointing downward. This configuration is explicitly shown in the package outline diagram on page No.778-2/4 of the official datasheet.
Can the 2SC2909S replace the 2SC2910S in a circuit?
No direct replacement is assured: the 2SC2909S (VCEO = −160 V, IC = −700 mA) and 2SC2910S (VCEO = −200 V, IC = −500 mA) differ in voltage/current trade-offs and hFE distribution. Substitution requires verification of voltage margin, peak current demand, and thermal dissipation - especially since their fT and Cob values are not identical.
What is the typical output capacitance (Cob) of the 2SC2909S and how does it vary with voltage?
The 2SC2909S exhibits Cob = 2.5 pF at VCB = −10 V, decreasing to ~1.0 pF at VCB = −50 V, as documented in the Cob–VCB curve (ITR02998) on page No.778-3/4. This voltage-dependent capacitance directly impacts high-frequency stability and must be included in small-signal AC modeling for amplifier or oscillator designs.
2SC2909S Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 70 mA
- Voltage - Collector Emitter Breakdown (Max):
- 160 V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 3mA, 30mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 140 @ 10mA, 5V
- Power - Max:
- 600 mW
- Frequency - Transition:
- 150MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 3-NP
2SC2909S FAQ
1.How can I place an order for 2SC2909S through Aetrix?
Please submit a Request for Quotation (RFQ) for 2SC2909S 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 2SC2909S reliable?
The price and inventory of 2SC2909S are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SC2909S is usually 5 days.
3.What payment methods are accepted for 2SC2909S?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SC2909S transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 2SC2909S?
2SC2909S orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 2SC2909S 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 2SC2909S?
For technical support, including 2SC2909S datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SC2909S requirements.
6.How does Aetrix verify that 2SC2909S is sourced from the original manufacturer or authorized distributors?
All 2SC2909S 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 2SC2909S meets industry standards.
7.What is the process for return or replacement of 2SC2909S?
All 2SC2909S units undergo pre-shipment inspection (PSI). If there is an issue with 2SC2909S, 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 2SC2909S part is unused and in its original packaging.
Return procedure for 2SC2909S:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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