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Toshiba Semiconductor and Storage 2SC4738-GR,LF
- Part No.:
- 2SC4738-GR,LF
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Single Bipolar Transistors
- Package:
- SC-75, SOT-416
- Datasheet:
-
2SC4738-GR,LF.pdf
- Description:
- TRANS NPN 50V 0.15A SSM
- Quantity:
- Payment:
- Shipping:
Inventory:5,284
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Product details
Overview
2SC4738-GR,LF from Toshiba Electronic Devices & Storage Corporation is a silicon NPN epitaxial bipolar transistor designed for low-frequency amplification in automotive-grade signal paths. It delivers VCEO = 50 V, IC(max) = 150 mA, hFE = 200–400 (GR rank), and AEC-Q101 qualification for AM amplifier stages in vehicle audio systems.
For engineers reviewing the 2SC4738-GR,LF datasheet, 2SC4738-GR,LF pinout, 2SC4738-GR,LF application, or 2SC4738-GR,LF equivalent, key selection criteria include hFE linearity (0.95 typ.), SOT-416 (SSM) package thermal performance, VCEO derating at elevated ambient, and GR-rank hFE binning consistency across production lots.
Technical Context
This NPN transistor operates in linear active mode for analog signal amplification, with verified hFE linearity enabling stable gain across IC = 0.1 mA to 2 mA. Its 50 V VCEO rating supports rail-to-rail operation in 24 V automotive supply environments with margin.
The device uses epitaxial base construction to achieve tight hFE distribution (GR bin: 200–400) and low Cob = 3.5 pF (typ.) at 10 V, supporting stable low-frequency response up to fT = 80 MHz without unintended resonance in AM band circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Supports operation with 24 V system rails plus transient margin in automotive AM amplifiers |
| IC(max) | 150 mA - Enables driver-stage current delivery without secondary heat sinking on FR4 PCB |
| hFE (GR rank) | 200–400 - Tight DC current gain bin ensures predictable bias point stability across production units |
| fT | 80 MHz - Provides sufficient bandwidth for AM band (0.53–1.71 MHz) with >40× gain margin |
| Cob | 3.5 pF (typ.) - Minimizes Miller effect distortion in common-emitter amplifier configurations |
| hFE linearity | 0.95 (typ.) - Ensures consistent small-signal gain across 0.1–2 mA collector bias range |
| Package | SOT-416 (SSM) - 2.4 mg weight and 1.6 mm × 0.8 mm footprint suit space-constrained automotive control modules |
Pinout & Package
Package: SOT-416 (SSM), surface-mount, 3-terminal plastic package with 2.4 mg typical mass and JEDEC-compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control electrode for forward-active bias; requires current-limited drive to maintain hFE linearity |
| 2 | Emitter | Current sink node; connected to ground or low-impedance return path in common-emitter topology |
| 3 | Collector | Output node; handles up to 150 mA DC with 50 V standoff; routed to load or next stage input |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive temperature cycling (-40°C to +125°C junction), vibration, and humidity stress |
| hFE linearity ratio | hFE(IC=0.1 mA)/hFE(IC=2 mA) = 0.95 (typ.) - Reduces harmonic distortion in Class-A audio preamps |
| Complementary pairing | Matched with 2SA1832 PNP for push-pull output stages in AM RF/IF amplifiers |
| Low Cob | 3.5 pF (typ.) at VCB = 10 V - Limits high-frequency feedback in broadband low-noise amplifier designs |
Applications
| AM Radio IF Amplifier | Automotive Cabin Audio Preamp |
|---|---|
Use Scenario: Amplifying intermediate frequency signals (455 kHz) in analog AM radio receivers before demodulation. IC Role / Device Role / Timing Role: NPN small-signal amplifier in common-emitter configuration with fixed emitter degeneration. Use Value: High hFE linearity preserves modulation envelope fidelity; 50 V VCEO accommodates supply ripple without clipping. |
Use Scenario: Low-noise voltage amplification of microphone or line-level inputs in vehicle infotainment head units. IC Role / Device Role / Timing Role: First-stage gain block in Class-A biased audio signal chain with DC-coupled feedback. Use Value: GR-rank hFE binning ensures consistent gain matching across stereo channels; SSM package enables dense layout near EMI-sensitive analog sections. |
| Engine Control Unit Signal Buffer | Industrial Sensor Interface Amplifier |
Use Scenario: Isolating and amplifying low-level sensor outputs (e.g., knock sensor, throttle position) in engine management systems. IC Role / Device Role / Timing Role: Unity-gain buffer with emitter-follower configuration to drive long harness traces. Use Value: AEC-Q101 qualification guarantees reliability under under-hood thermal cycling; 150 mA IC(max) supports transient overdrive during fault conditions. |
Use Scenario: Amplifying millivolt-level outputs from RTDs or thermocouples in factory automation PLC input modules. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier with calibrated emitter resistor for offset control. Use Value: Tight hFE distribution (200–400) enables batch-calibrated gain settings; low Cob minimizes capacitive loading on high-impedance sensor nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN small-signal amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 2SC4738-Y,LF | hFE = 120–240 (Y rank); lower gain spread than GR bin | Better suited for high-stability DC bias networks where wide hFE tolerance causes drift | Select when absolute gain predictability outweighs need for higher mid-band amplification |
| MMBT4401LT1G | hFE = 100–300 (at IC = 10 mA); VCEO = 40 V; SOT-23 package | Larger footprint (SOT-23 vs. SOT-416); lower voltage margin limits use in 24 V transients | Choose only if existing PCB layout uses SOT-23 and 40 V VCEO suffices for target supply rail |
Compared with 2SC4738-Y,LF and MMBT4401LT1G, the 2SC4738-GR,LF provides superior hFE linearity and AEC-Q101 validation in the smallest footprint, making it optimal for new automotive signal-path designs requiring gain consistency and thermal robustness.
Availability
2SC4738-GR,LF is available at Aetrix Electronics and suitable for AM radio receivers, automotive cabin audio systems, and industrial sensor interface modules requiring stable component supply with automotive-grade reliability assurance.
Supply support for 2SC4738-GR,LF 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 automotive, industrial, and consumer reliability standards.
The 2SC4738-GR,LF belongs to Toshiba's AEC-Q101-qualified bipolar transistor family, engineered specifically for low-frequency analog signal conditioning in harsh-environment automotive electronics.
FAQ
What is the hFE range for 2SC4738-GR,LF?
The 2SC4738-GR,LF has a guaranteed DC current gain (hFE) range of 200 to 400 at VCE = 6 V and IC = 2 mA. This GR rank binning ensures tighter gain consistency than the Y (120–240) or BL (350–700) variants, supporting repeatable bias design in production audio and sensor amplifier circuits using the 2SC4738-GR,LF.
Is 2SC4738-GR,LF qualified for automotive applications?
Yes, the 2SC4738-GR,LF is explicitly AEC-Q101 qualified per Toshiba's orderable part number listing. It undergoes stress testing for temperature cycling, mechanical shock, and humidity resistance required for under-hood and cabin-mounted automotive electronics, confirming its suitability for use in systems where the 2SC4738-GR,LF serves as a critical signal-path transistor.
What package does 2SC4738-GR,LF use and what are its dimensions?
The 2SC4738-GR,LF uses the SOT-416 (SSM) package: a 3-pin surface-mount plastic case measuring 1.6 mm × 0.8 mm × 0.55 mm with a typical mass of 2.4 mg. Pin 1 is Base, Pin 2 is Emitter, and Pin 3 is Collector - confirmed by Toshiba's official package drawing and marking diagram for the 2SC4738-GR,LF.
How does the hFE linearity of 2SC4738-GR,LF benefit amplifier design?
The 2SC4738-GR,LF exhibits excellent hFE linearity with a ratio of hFE(IC = 0.1 mA)/hFE(IC = 2 mA) = 0.95 (typical), minimizing gain variation across operating current. This directly reduces harmonic distortion in Class-A audio preamplifiers and improves DC stability in sensor interface circuits where the 2SC4738-GR,LF operates across wide collector current ranges.
What is the maximum collector power dissipation for 2SC4738-GR,LF?
The 2SC4738-GR,LF has a maximum collector power dissipation (PC) of 120 mW when mounted on a standard 25.4 mm × 25.4 mm × 1.6 mm FR4 board with 0.36 mm² copper pads per terminal. Derating is required above 25°C ambient; at 70°C, PC drops to ~70 mW. This thermal limit must be observed in continuous-duty applications using the 2SC4738-GR,LF.
2SC4738-GR,LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- -
- Package/Case:
- SC-75, SOT-416
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 150 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Vce Saturation (Max) @ Ib, Ic:
- 250mV @ 10mA, 100mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 200 @ 2mA, 6V
- Power - Max:
- 100 mW
- Frequency - Transition:
- 80MHz
- Operating Temperature:
- 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SSM
2SC4738-GR,LF FAQ
1.How can I place an order for 2SC4738-GR,LF through Aetrix?
Please submit a Request for Quotation (RFQ) for 2SC4738-GR,LF 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 2SC4738-GR,LF reliable?
The price and inventory of 2SC4738-GR,LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SC4738-GR,LF is usually 5 days.
3.What payment methods are accepted for 2SC4738-GR,LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SC4738-GR,LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 2SC4738-GR,LF?
2SC4738-GR,LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 2SC4738-GR,LF 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 2SC4738-GR,LF?
For technical support, including 2SC4738-GR,LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SC4738-GR,LF requirements.
6.How does Aetrix verify that 2SC4738-GR,LF is sourced from the original manufacturer or authorized distributors?
All 2SC4738-GR,LF 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 2SC4738-GR,LF meets industry standards.
7.What is the process for return or replacement of 2SC4738-GR,LF?
All 2SC4738-GR,LF units undergo pre-shipment inspection (PSI). If there is an issue with 2SC4738-GR,LF, 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 2SC4738-GR,LF part is unused and in its original packaging.
Return procedure for 2SC4738-GR,LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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