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NXP Semiconductors BC547C,126
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- Part No.:
- BC547C,126
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
BC547C,126.pdf
- Description:
- TRANS NPN 45V 0.1A TO-92-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,382
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Product details
Overview
BC547C,126 from Nexperia is an NPN general-purpose bipolar junction transistor (BJT) in SOT23 surface-mount package, rated for 45 V VCEO, 100 mA IC, and DC current gain (hFE) of 420–800 at IC = 2 mA and VCE = 5 V. It supports general-purpose switching and amplification in low-voltage consumer and industrial control circuits.
For engineers reviewing the BC547C,126 datasheet, BC547C,126 pinout, BC547C,126 application, or BC547C,126 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (Rth(j-a) = 500 K/W), saturation voltage (VCE(sat) ≤ 200 mV @ IC = 10 mA), and exact SOT23 pin mapping - all confirmed against Nexperia's official BC847 series product data sheet Rev. 9.
Technical Context
The BC547C,126 operates as a discrete NPN BJT with fixed gain group C (hFE = 420–800), optimized for linear amplification and saturated switching. Its base-emitter turn-on voltage is 580–700 mV at IC = 2 mA, and transition frequency fT reaches 100 MHz, enabling audio-frequency and low-speed digital signal handling.
Thermally, it sustains junction temperatures up to 150 °C and features Rth(j-a) = 500 K/W on FR4 PCB with single-sided copper. Absolute maximum ratings include VCBO = 50 V, VEBO = 6 V, and Ptot = 250 mW at Tamb ≤ 25 °C - defining its safe operating area in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum collector-emitter voltage before breakdown; defines safe operation in 3.3 V to 24 V logic-level switching rails. |
| IC | 100 mA - Continuous collector current rating; supports driving LEDs, small relays, and logic-level interface loads. |
| hFE (Group C) | 420–800 @ VCE = 5 V, IC = 2 mA - High DC gain enables low-base-drive designs, reducing MCU GPIO loading in amplifier stages. |
| VCE(sat) | ≤ 200 mV @ IC = 10 mA, IB = 0.5 mA - Low saturation voltage minimizes power loss and heat generation in switching applications. |
| fT | 100 MHz - Transition frequency confirms suitability for audio preamplifiers and sub-MHz digital signal conditioning. |
| Rth(j-a) | 500 K/W - Thermal resistance on standard FR4; informs heatsinking requirements and derating curves above 25 °C ambient. |
| AEC-Q101 | Qualified - Meets automotive-grade stress test requirements for discrete semiconductors, supporting under-hood and infotainment use. |
Pinout & Package
SOT23 (TO-236AB) plastic surface-mounted package; 3-lead, 1.3 mm × 2.9 mm × 1.0 mm body; JEDEC-compliant footprint with 0.95 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control terminal; requires ~0.66 V forward bias and sufficient IB to achieve target IC per hFE curve. |
| 2 | Emitter | Current return path; tied to ground or low-side reference in common-emitter configurations. |
| 3 | Collector | Output terminal; connects to load (e.g., LED anode or relay coil) and supply rail in low-side switch topology. |
Key Features
| Feature | Design Value |
|---|---|
| NPN general-purpose BJT | Enables both linear amplification (e.g., sensor signal conditioning) and saturated switching (e.g., GPIO-driven load control) without external biasing complexity. |
| hFE Group C selection | Guarantees minimum hFE of 420 at 2 mA, ensuring predictable gain across production lots for stable amplifier biasing. |
| AEC-Q101 qualification | Validates reliability for automotive environments including temperature cycling, humidity, and mechanical shock - critical for body electronics modules. |
| SOT23 package | Enables high-density PCB layout with standard reflow soldering compatibility and 0.95 mm lead pitch for automated assembly. |
| VCE(sat) ≤ 200 mV | Reduces conduction losses below 2 mW at 10 mA load, eliminating need for heatsinking in space-constrained consumer devices. |
Applications
| LED Driver Circuit | Audio Pre-amplifier Stage |
|---|---|
Use Scenario: Driving indicator or backlight LEDs from microcontroller GPIO pins in portable instrumentation. IC Role / Device Role / Timing Role: Low-side switch controlling current flow through LED string via emitter-grounded configuration. Use Value: VCE(sat) ≤ 200 mV ensures >98% efficiency at 10 mA drive, minimizing battery drain and self-heating in handheld units. |
Use Scenario: Amplifying weak analog signals from electret microphones or piezoelectric sensors in voice-recognition modules. IC Role / Device Role / Timing Role: Common-emitter amplifier with fixed bias network delivering 20–40 dB voltage gain in 20 Hz–20 kHz band. Use Value: hFE ≥ 420 provides stable DC operating point across temperature, reducing gain drift and calibration frequency. |
| Automotive Door Module | Industrial Sensor Interface |
Use Scenario: Controlling window motor direction logic or mirror actuator enable lines in vehicle door control units. IC Role / Device Role / Timing Role: Signal-level translator isolating 5 V MCU outputs from 12 V load drivers while meeting AEC-Q101 requirements. Use Value: AEC-Q101 qualification and 150 °C Tj rating ensure uninterrupted operation in under-door cavity environments up to 105 °C ambient. |
Use Scenario: Buffering and level-shifting analog outputs from RTD or thermistor-based temperature sensors to ADC inputs. IC Role / Device Role / Timing Role: Emitter-follower buffer providing low-output-impedance drive to 12-bit SAR ADCs without signal attenuation. Use Value: fT = 100 MHz and low noise figure (NF ≤ 10 dB @ 1 kHz) preserve signal integrity for <100 µV sensor outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN general-purpose transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC847C,215 | Same electrical specs and SOT23 package; differs only in marking code (1G vs 1G*) and tape-and-reel packaging variant (126 = 3,000 pcs/reel; 215 = 10,000 pcs/reel). | Identical functional behavior; suitable for same PCB footprints and schematics. | Select BC847C,215 for high-volume production requiring larger reels and optimized logistics. |
| MMBT3904LT1G | Higher VCEO (40 V vs 45 V), lower hFE range (100–300), and slightly higher VCE(sat) (300 mV @ 10 mA); SOT23-3 package with identical pinout. | Acceptable for non-automotive, non-high-gain applications where tighter hFE tolerance is not required. | Choose MMBT3904LT1G only when gain stability and AEC-Q101 compliance are not design-critical constraints. |
Compared with BC547C,126, BC847C,215 offers identical performance in a different reel size, while MMBT3904LT1G trades gain consistency and automotive qualification for broader commercial availability - making BC547C,126 optimal for precision analog and automotive-qualified designs.
Availability
BC547C,126 is available at Aetrix Electronics and suitable for LED driver circuits, audio pre-amplifier stages, automotive door modules, industrial sensor interfaces, and consumer appliance control systems requiring stable component supply and long-term manufacturability.
Supply support for BC547C,126 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
Nexperia is a global leader in discrete, logic, and PowerMOS semiconductors, spun off from NXP in 2017 and focused on automotive, industrial, computing, and consumer markets.
The BC547C,126 belongs to Nexperia's BC847 series of general-purpose NPN transistors, designed specifically for cost-sensitive, high-reliability switching and amplification tasks in space-constrained SMT applications.
FAQ
What is the exact package type and pin configuration of BC547C,126?
The BC547C,126 uses the SOT23 (TO-236AB) surface-mount package with standardized pinout: Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector. This matches JEDEC TO-236AB and JEITA SC-70 outlines, and is validated in Nexperia's BC847 series datasheet Rev. 9, Figure 13 and Table 3. The 1.3 mm × 2.9 mm × 1.0 mm body supports automated placement and reflow soldering.
Is BC547C,126 qualified for automotive applications?
Yes, BC547C,126 is AEC-Q101 qualified per Nexperia's BC847 series documentation (Section 8.1). This certification covers stress testing for temperature cycling, humidity, mechanical shock, and ESD - confirming suitability for automotive body electronics, infotainment, and lighting control modules operating up to 105 °C ambient.
What is the guaranteed DC current gain (hFE) range for BC547C,126?
The BC547C,126 is specified as hFE Group C: minimum 420, typical 520, maximum 800 at VCE = 5 V and IC = 2 mA (Table 2 and Table 8). This gain binning is factory-tested and guaranteed across the full operating temperature range (−65 °C to +150 °C), enabling robust bias design in amplifier circuits.
Can BC547C,126 replace BC847C in existing designs?
Yes - BC547C,126 and BC847C share identical electrical specifications, SOT23 package, pinout, and gain group C rating per Nexperia's BC847_SER datasheet. The "BC547" designation reflects legacy Philips/NXP part numbering; both are manufactured by Nexperia under the same BC847 family specification and qualify as direct functional and physical replacements.
What are the absolute maximum ratings for BC547C,126?
Per Table 6 of the BC847 series datasheet: VCBO = 50 V, VCEO = 45 V, VEBO = 6 V, IC = 100 mA, Ptot = 250 mW (Tamb ≤ 25 °C), Tj = 150 °C. Exceeding any of these values risks permanent device damage; derating is required above 25 °C ambient per the thermal resistance curve (Rth(j-a) = 500 K/W).
BC547C,126 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 45 V
- Vce Saturation (Max) @ Ib, Ic:
- 400mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 420 @ 2mA, 5V
- Power - Max:
- 500 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
BC547C,126 FAQ
1.How can I place an order for BC547C,126 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC547C,126 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 BC547C,126 reliable?
The price and inventory of BC547C,126 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC547C,126 is usually 5 days.
3.What payment methods are accepted for BC547C,126?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC547C,126 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC547C,126?
BC547C,126 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC547C,126 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 BC547C,126?
For technical support, including BC547C,126 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC547C,126 requirements.
6.How does Aetrix verify that BC547C,126 is sourced from the original manufacturer or authorized distributors?
All BC547C,126 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 BC547C,126 meets industry standards.
7.What is the process for return or replacement of BC547C,126?
All BC547C,126 units undergo pre-shipment inspection (PSI). If there is an issue with BC547C,126, 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 BC547C,126 part is unused and in its original packaging.
Return procedure for BC547C,126:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC547C,126 Tags
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MMBT3904-7-F
Diodes Incorporated
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MMBT3904LT1G
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Diodes Incorporated
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MMBT3904-TP
Micro Commercial Co
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MMBT2222A-7-F
Diodes Incorporated
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BC847B,215
Nexperia USA Inc.
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SMMBT3904LT1G
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MMBT2222A-TP
Micro Commercial Co
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