Basic Product Information
Part Number: BC847BLT1G
| Field |
Value |
| Manufacturer |
onsemi (ON Semiconductor) |
| Device Type |
BC847BLT1G |
| Package |
SOT-23-3 (TO-236-3) |
| Compliance |
RoHS3 / REACH Unaffected / Halogen-Free |
| Grade |
AEC-Q101 Qualified / Industrial (-55°C to +150°C TJ) |
| Series |
BC846ALT1G Series (BCxxx) |
| Product Status |
Active |
| MSL |
MSL 1 – Unlimited |
| ECCN |
EAR99 |
| Marking Code |
1F |
Core Electrical Parameters
| Parameter |
Value |
Unit |
| Transistor Type |
NPN |
– |
| Configuration |
Single |
– |
| Collector-Emitter Voltage (VCEO) |
45 |
V (max) |
| Collector-Base Voltage (VCBO) |
50 |
V |
| Emitter-Base Voltage (VEBO) |
6 |
V |
| Continuous Collector Current (IC) |
100 |
mA (max) |
| DC Current Gain (hFE) |
200 ~ 450 |
@ 2 mA, 5V (B group) |
| Collector-Emitter Saturation Voltage (VCE(sat)) |
600 |
mV (max) @ 5 mA, 100 mA |
| Emitter-Base On Voltage (VBE(on)) |
660 |
mV |
| Collector Cutoff Current (ICBO) |
15 |
nA (max) |
| Transition Frequency (fT) |
100 |
MHz |
| Power Dissipation |
300 |
mW (max) |
| Operating Temperature |
-55 ~ +150 |
°C (TJ) |
| Package Dimensions |
2.90 x 1.30 x 1.00 |
mm |
| Factory Pack Quantity |
3,000 |
Tape & Reel |
Core Features & Advantages
The BC847BLT1G is onsemi’s AEC-Q101 qualified, general-purpose NPN bipolar junction transistor in a SOT-23-3 package — delivering 45 V / 100 mA switching and amplification with hFE group B (200–450) binning, making it the industry-standard small-signal NPN for automotive and industrial designs that require guaranteed gain tolerance and PPAP documentation.
- Primary Function: General-purpose NPN BJT, 45 VCEO, 100 mA IC, hFE 200–450 (Group B), 100 MHz fT, 300 mW power dissipation, SOT-23-3 surface-mount package, AEC-Q101 qualified and PPAP capable.
- Advantages:
- AEC-Q101 Qualified + PPAP Capable — Automotive-Grade Reliability: The BC847BLT1G passes the full AEC-Q101 qualification suite (temperature cycling, HTRB, HTGB, ESD, and more), guaranteeing reliable operation from -55°C to +150°C junction temperature. PPAP capability means automotive OEMs can order this part with production part approval process documentation — eliminating a common sourcing barrier for Tier 1 and Tier 2 suppliers who must demonstrate part-level traceability and qualification evidence.
- hFE Group B Binning (200–450) — Predictable Gain for Analog Design: The “B” suffix denotes tight hFE binning at 200–450 (measured at IC = 2 mA, VCE = 5V). This 2.25× spread is significantly narrower than the full 110–800 range of the unsorted BC847, enabling analog designers to set bias points with confidence without trimmer potentiometers or software calibration loops. In push-pull output stages and current mirror circuits, matched hFE between NPN (BC847B) and PNP (BC807B) pairs reduces DC offset and crossover distortion.
- MSL 1 + Halogen-Free — Unlimited Floor Life, Green Compliance: MSL 1 (unlimited) means no bake-out before reflow — the BC847BLT1G can be stored indefinitely in standard factory environments and loaded directly onto SMT placement machines. Combined with halogen-free molding compound, this simplifies material handling, reduces manufacturing cycle time, and meets IEC 61249-2-21 halogen-free requirements for green electronics mandates.
Typical Application Scenarios
- Industry: Automotive / Industrial / Consumer Electronics / Telecommunications
- Equipment: ECU signal conditioning, sensor interfaces, LED drivers, relay drivers, load switches, logic level translators, audio preamplifiers
- Use Cases:
- Automotive ECU Low-Side Switch for Indicator LEDs: The BC847BLT1G drives dashboard indicator LEDs (typically 10–20 mA) as a low-side switch controlled by a 3.3V MCU GPIO. The 45V VCEO provides ample margin against automotive load dump transients when protected by an upstream TVS, while the 100 mA rating supports up to 30 parallel LEDs per transistor. The AEC-Q101 qualification ensures this part survives the 85°C under-hood ambient and 1500 temperature cycles specified in LV 124.
- Industrial Sensor Signal Conditioning (Current-to-Voltage): In 4–20 mA current loop receiver circuits, the BC847BLT1G amplifies the small voltage developed across a precision shunt resistor to a level suitable for an ADC input. The hFE of 200–450 provides sufficient gain in a single stage, and the 15 nA ICBO ensures minimal offset drift over the -40°C to +85°C industrial operating range. The SOT-23-3 footprint allows the transistor to be placed directly at the connector entry point, minimizing EMI pickup on the high-impedance analog trace.
- Logic Level Translation (5V to 3.3V): In mixed-voltage systems, the BC847BLT1G translates 5V logic signals to 3.3V levels using a simple common-emitter inverter with a pull-up resistor to the 3.3V rail. The 6V VEBO and 45V VCEO tolerate 5V inputs without clamping diodes, and the 100 MHz fT ensures clean switching edges at data rates up to several MHz — adequate for SPI, UART, and slow GPIO bridging between 5V legacy peripherals and 3.3V MCUs.
Market Reference Price
| Market |
Price Range |
Currency |
| DigiKey (CT) |
$0.130 (1 pcs) / $0.030 (1,000+ pcs) |
USD |
| DigiKey (TR) |
$0.023 (3,000+ pcs) / $0.020 (6,000+ pcs) |
USD |
| Newark |
$0.111 (1 pcs) / $0.029 (1,000+ pcs) |
USD |
| Huaqiangbei Spot |
¥0.07 ~ ¥0.17 |
CNY |
Related Models Comparison
| Model |
Difference |
Application |
| BC847ALT1G |
Same die, hFE Group A (110–220) |
Lower gain applications, open-collector drivers |
| BC847CLT1G |
Same die, hFE Group C (420–800) |
High-gain preamplifier stages, Darlington replacement |
| BC847,215 (Nexperia) |
Pin-compatible equivalent, Nexperia brand |
Second-source / dual-sourcing strategy |
| MMBT3904LT1G |
40V, 200 mA, 300 MHz, different hFE profile |
Higher current / higher frequency switching |
| BC807BLT1G |
PNP complement, -45V, -500 mA, hFE 200–450 |
Push-pull pair, complementary driver |
