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Toshiba Semiconductor and Storage 2SC4738-GR,LXHF
- Part No.:
- 2SC4738-GR,LXHF
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Single Bipolar Transistors
- Package:
- SC-75, SOT-416
- Datasheet:
-
2SC4738-GR,LXHF.pdf
- Description:
- TRANS NPN 50V 0.15A SSM
- Quantity:
- Payment:
- Shipping:
Inventory:3,990
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Product details
Overview
2SC4738-GR,LXHF 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 infotainment front-end circuits.
For engineers reviewing the 2SC4738-GR,LXHF datasheet, 2SC4738-GR,LXHF pinout, 2SC4738-GR,LXHF application, or 2SC4738-GR,LXHF equivalent, key selection criteria include hFE linearity (0.95 typ.), SOT-416 (SSM) package thermal limits, VCE(sat) ≤ 0.25 V at IC = 100 mA/IB = 10 mA, and automotive-compliant reliability under Ta ≤ 125 °C.
Technical Context
This transistor operates as a linear active-mode amplifier with DC current gain tightly binned to GR classification (200–400). Its fT = 80 MHz (typ.) supports stable low-frequency operation up to AM band edges while maintaining low Cob = 3.5 pF for minimal Miller effect in common-emitter configurations.
The device uses epitaxial base construction to achieve excellent hFE linearity-hFE(IC = 0.1 mA)/hFE(IC = 2 mA) = 0.95 typ.-enabling consistent small-signal gain across bias points in audio preamplifier and IF amplifier stages without distortion compensation circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Supports rail-to-rail operation in 24 V automotive systems with margin against transients. |
| IC(max) | 150 mA - Enables drive capability for medium-power audio output stages or sensor interface buffers. |
| hFE (GR rank) | 200–400 - Ensures predictable DC bias stability in fixed-bias or emitter-degenerated amplifier topologies. |
| VCE(sat) | ≤ 0.25 V @ IC = 100 mA, IB = 10 mA - Minimizes conduction loss and self-heating in saturated-switching auxiliary functions. |
| fT | 80 MHz (typ.) - Provides sufficient bandwidth for AM IF amplification (up to 1.6 MHz) with >50× gain margin. |
| Cob | 3.5 pF @ VCB = 10 V - Limits high-frequency feedback in multi-stage amplifiers without requiring neutralization. |
Pinout & Package
2SC4738-GR,LXHF is housed in the SOT-416 (JEDEC) package, also known as SSM, with a 2.4 mg typical mass and footprint optimized for space-constrained automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control electrode accepting 10 mA max base drive; requires series resistor to limit IB during saturation. |
| 2 | Emitter | Current sink node tied to ground or low-impedance return path; must be routed with low-inductance trace in RF-sensitive layouts. |
| 3 | Collector | Output node handling up to 150 mA DC; connects to load resistor or transformer primary in single-ended amplifier designs. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive temperature cycling, humidity, and mechanical shock per JESD22-A108, enabling use in non-safety-critical vehicle electronics. |
| High hFE linearity | hFE ratio of 0.95 typ. between 0.1 mA and 2 mA collector currents ensures uniform gain across operating range in Class-A amplifiers. |
| Complementary pairing | Designed as NPN counterpart to 2SA1832 PNP, supporting push-pull output stages in differential audio drivers. |
| Small-outline SSM package | SOT-416 footprint (1.2 × 0.8 × 0.55 mm) allows dense placement in compact head-unit PCBs with thermal pad omitted. |
Applications
| AM Radio IF Amplifier | Automotive Cabin Microphone Preamp |
|---|---|
Use Scenario: Amplifying 455 kHz intermediate frequency signals in analog AM radio receivers within vehicle infotainment systems. IC Role / Device Role / Timing Role: Linear NPN amplifier in common-emitter configuration with fixed bias network and emitter degeneration resistor. Use Value: Delivers stable 200–400 hFE across production lots and temperature (−40 °C to 125 °C), minimizing gain drift and reducing need for factory calibration. | Use Scenario: Boosting weak electret microphone outputs (mV-level) before ADC sampling in hands-free voice recognition modules. IC Role / Device Role / Timing Role: Low-noise, low-distortion preamplifier stage with emitter-follower buffer to drive 10 kΩ input impedance of codec ICs. Use Value: Excellent hFE linearity preserves waveform fidelity at low signal levels, preventing harmonic distortion that degrades speech recognition accuracy. |
| Engine Control Unit Sensor Interface | Instrument Cluster Audio Alert Driver |
Use Scenario: Conditioning analog voltage outputs from temperature or pressure sensors prior to microcontroller ADC input. IC Role / Device Role / Timing Role: Unity-gain emitter follower providing impedance transformation and noise immunity for millivolt-range sensor signals. Use Value: AEC-Q101 qualification ensures reliable operation under engine bay thermal stress (125 °C junction), avoiding signal dropout during extended hot-soak conditions. | Use Scenario: Driving piezoelectric buzzers or miniature speakers for audible warnings (e.g., seatbelt chime, door-open alert) in digital instrument clusters. IC Role / Device Role / Timing Role: Switching amplifier biased in Class AB to deliver 150 mA peak current pulses with fast turn-on/turn-off response. Use Value: Low VCE(sat) ≤ 0.25 V reduces power dissipation in pulsed operation, extending buzzer lifetime and limiting PCB temperature rise near display components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN bipolar transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 2SC4738-Y,LXHF | hFE = 120–240 (Y rank); lower gain spread but reduced maximum hFE. | Better suited for applications requiring tighter hFE tolerance at lower current, such as precision current mirrors. | Select when design prioritizes hFE consistency over peak gain; not recommended for high-gain IF stages. |
| 2SC4738-BL,LXHF | hFE = 350–700 (BL rank); higher gain ceiling but wider binning variance. | Preferred for low-current, high-gain preamplifier nodes where bias point stability is less critical than signal-to-noise ratio. | Choose when maximizing small-signal gain is essential and thermal derating can accommodate higher hFE sensitivity to temperature. |
Compared with 2SC4738-Y,LXHF and 2SC4738-BL,LXHF, the 2SC4738-GR,LXHF provides optimal balance of gain (200–400), linearity (0.95 hFE ratio), and automotive qualification-making it the default choice for AM IF amplifiers and microphone preamps where both performance and production yield matter.
Availability
2SC4738-GR,LXHF is available at Aetrix Electronics and suitable for automotive infotainment, engine control unit sensor interfaces, and instrument cluster audio alert systems requiring stable component supply with AEC-Q101 compliance and long-term lifecycle support.
Supply support for 2SC4738-GR,LXHF 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 focus on automotive, industrial, and consumer applications.
The 2SC4738 family belongs to Toshiba's AEC-Q101-qualified bipolar transistor product line, engineered specifically for robust low-frequency amplification in harsh automotive environments where reliability and parametric consistency are mandatory.
FAQ
What does the 'GR' suffix indicate in 2SC4738-GR,LXHF?
The 'GR' suffix denotes the hFE gain bin classification for the 2SC4738-GR,LXHF, specifying a DC current gain range of 200 to 400 at VCE = 6 V and IC = 2 mA. This binning enables predictable biasing in amplifier circuits without requiring post-manufacturing gain trimming or selection, and is validated per Toshiba's production test flow.
Is 2SC4738-GR,LXHF qualified for automotive use?
Yes, 2SC4738-GR,LXHF is explicitly AEC-Q101 qualified, as confirmed in Toshiba's orderable part number table and Rev.4.0.A datasheet. It meets stress testing requirements for temperature cycling, humidity, and mechanical shock applicable to non-safety-critical automotive electronics such as infotainment and body control modules.
What package type is used for 2SC4738-GR,LXHF?
2SC4738-GR,LXHF uses the SOT-416 package, also designated by Toshiba as SSM. It is a surface-mount, three-terminal plastic package measuring 1.2 mm × 0.8 mm × 0.55 mm with a typical weight of 2.4 mg, and features pin 1 = Base, pin 2 = Emitter, pin 3 = Collector.
How does hFE linearity impact circuit performance in 2SC4738-GR,LXHF?
2SC4738-GR,LXHF achieves hFE(IC = 0.1 mA)/hFE(IC = 2 mA) = 0.95 (typ.), meaning its current gain remains nearly constant across two decades of collector current. This linearity reduces harmonic distortion in Class-A amplifiers and improves stability in feedback networks where gain variation could cause oscillation or gain compression.
What is the maximum allowable junction temperature for 2SC4738-GR,LXHF?
The absolute maximum junction temperature (Tj) for 2SC4738-GR,LXHF is 150 °C, as specified in Toshiba's Absolute Maximum Ratings table. Derating is required above Ta = 25 °C; for example, at ambient 100 °C, maximum allowable PC drops to ~40 mW on a standard FR4 board, per Fig. 8.7 and Fig. 8.8 in the datasheet.
2SC4738-GR,LXHF 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:
- 120 mW
- Frequency - Transition:
- 80MHz
- Operating Temperature:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SSM
2SC4738-GR,LXHF FAQ
1.How can I place an order for 2SC4738-GR,LXHF through Aetrix?
Please submit a Request for Quotation (RFQ) for 2SC4738-GR,LXHF 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,LXHF reliable?
The price and inventory of 2SC4738-GR,LXHF 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,LXHF is usually 5 days.
3.What payment methods are accepted for 2SC4738-GR,LXHF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SC4738-GR,LXHF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 2SC4738-GR,LXHF?
2SC4738-GR,LXHF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 2SC4738-GR,LXHF 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,LXHF?
For technical support, including 2SC4738-GR,LXHF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SC4738-GR,LXHF requirements.
6.How does Aetrix verify that 2SC4738-GR,LXHF is sourced from the original manufacturer or authorized distributors?
All 2SC4738-GR,LXHF 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,LXHF meets industry standards.
7.What is the process for return or replacement of 2SC4738-GR,LXHF?
All 2SC4738-GR,LXHF units undergo pre-shipment inspection (PSI). If there is an issue with 2SC4738-GR,LXHF, 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,LXHF part is unused and in its original packaging.
Return procedure for 2SC4738-GR,LXHF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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