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onsemi BC846BLT1
- Part No.:
- BC846BLT1
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- -
- Datasheet:
-
BC846BLT1.pdf
- Description:
- TRANS NPN 65V 100MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:8,559
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Product details
Overview
BC846BLT1 from onsemi is an NPN silicon general-purpose transistor in SOT-23 package, rated for 65 VCEO, 100 mA continuous collector current, and DC current gain (hFE) of 200–450 at IC = 10 mA, VCE = 5 V. It serves as a low-voltage switching or amplification element in signal conditioning, power management, and interface circuits.
For engineers reviewing the BC846BLT1 datasheet, pinout, applications, or equivalent options, key selection criteria include its VCEO/VCBO ratings, hFE binning (B-grade), saturation voltage at 10 mA/0.5 mA drive, thermal resistance on FR-5 board (556 °C/W), and Pb-free SOT-23 packaging compliance.
Technical Context
The BC846BLT1 belongs to the BC846/847/848 family of discrete NPN transistors optimized for general-purpose linear and switching applications. Its B-grade hFE bin (200–450) provides tighter gain control than A-grade (110–220) and supports predictable biasing in amplifier stages or digital logic interfaces.
It operates across −55 °C to +150 °C junction temperature range, with ESD ratings >4000 V (HBM) and >400 V (MM), and exhibits fT = 100 MHz at IC = 10 mA, VCE = 5 V - enabling use in low-frequency RF and broadband analog signal paths up to ~10 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 65 V - maximum safe collector-emitter voltage before breakdown; suitable for 24 V and 48 V industrial bus interfaces. |
| IC (continuous) | 100 mA - supports relay drivers, LED current control, and small-signal load switching without heatsinking. |
| hFE (B grade) | 200–450 @ IC = 10 mA, VCE = 5 V - enables stable DC bias in common-emitter amplifiers with minimal base drive variation. |
| VCE(sat) | 0.25 V max @ IC = 10 mA, IB = 0.5 mA - ensures low conduction loss in saturated-switch applications like level translation or enable control. |
| fT | 100 MHz - supports high-speed switching (tON/tOFF < 3.5 ns typical) and audio-frequency amplification up to 20 kHz with margin. |
| RJA (FR-5) | 556 °C/W - limits power dissipation to 225 mW at 25 °C ambient; derates to 1.8 mW/°C above 25 °C. |
Pinout & Package
SOT-23 (Case 318, Style 6) surface-mount package with 3-pin configuration, moisture sensitivity level 1, and Pb-free finish. Dimensions: 2.0 × 1.25 × 0.95 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control input; requires ~0.5 mA drive for full saturation at 10 mA collector load; VBE(sat) ≤ 0.9 V. |
| 2 | Emitter | Reference node for bias network; connected to ground or low-impedance return path in common-emitter configurations. |
| 3 | Collector | Output terminal; handles up to 65 V and 100 mA; layout must minimize trace inductance for fast switching. |
Key Features
| Feature | Design Value |
|---|---|
| Pb-free SOT-23 package | Complies with RoHS Directive 2011/65/EU; compatible with lead-free reflow profiles (peak 260 °C). |
| ESD robustness | HBM >4000 V and MM >400 V - reduces risk of handling damage during PCB assembly and field service. |
| Wide operating temperature | −55 °C to +150 °C junction range - supports deployment in automotive under-hood, industrial motor drives, and outdoor equipment. |
| Low VCE(sat) | 0.25 V max at IC/IB = 20 - minimizes power loss and self-heating in battery-powered sensor nodes and portable devices. |
Applications
| Industrial Sensor Interface | LED Driver Circuit |
|---|---|
Use Scenario: Amplifying low-level analog output (e.g., 0–100 mV) from RTD or thermistor bridges into ADC input range. IC Role / Device Role / Timing Role: NPN common-emitter amplifier with fixed-gain bias network using BC846BLT1's stable hFE bin. Use Value: Enables accurate 12-bit+ temperature measurement without op-amp cost; gain error < ±3% over −40 °C to +85 °C. | Use Scenario: Driving 20 mA indicator LEDs from 3.3 V or 5 V microcontroller GPIO pins. IC Role / Device Role / Timing Role: Saturated switch controlling LED anode connection to supply rail via collector. Use Value: Delivers consistent brightness with < 0.25 V dropout; eliminates need for external current-limiting resistors on MCU side. |
| Power Supply Enable Control | Logic-Level Translation |
Use Scenario: Enabling/disabling 12 V auxiliary rails in embedded systems using 3.3 V FPGA or MCU outputs. IC Role / Device Role / Timing Role: Low-side switch turning on P-channel MOSFET gate or directly sourcing enable signal. Use Value: Provides clean 12 V rail activation with < 1 µs delay; avoids shoot-through in multi-rail sequencing. | Use Scenario: Converting 1.8 V logic signals to 3.3 V or 5 V levels for legacy peripherals. IC Role / Device Role / Timing Role: Common-emitter level shifter with pull-up resistor on collector and grounded emitter. Use Value: Supports 10 MHz data rates with < 5 ns propagation delay; no external level-shifter IC required. |
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 |
|---|---|---|---|
| BC846BMTF | Same electrical specs; SOT-23 package but with wettable flank terminations for automated optical inspection (AOI). | Preferred for high-volume automated assembly where solder joint inspection is required. | Select BC846BMTF when AOI capability is mandated; otherwise BC846BLT1 offers identical performance at lower cost. |
| MMBT3904LT1G | hFE range 100–300 (standard grade); VCEO = 40 V; fT = 300 MHz; same SOT-23 footprint. | Higher fT suits faster switching, but lower VCEO restricts use in 48 V systems. | Choose MMBT3904LT1G for >10 MHz switching or cost-sensitive designs; BC846BLT1 preferred for 65 V tolerance and tighter hFE. |
Compared with BC846BMTF and MMBT3904LT1G, the BC846BLT1 delivers superior voltage headroom (65 V vs. 40 V) and tighter hFE consistency (200–450), making it optimal for precision biasing and industrial power interface applications where reliability under voltage stress is critical.
Availability
BC846BLT1 is available at Aetrix Electronics and suitable for industrial sensor interfaces, LED driver circuits, power supply enable control, and logic-level translation requiring stable component supply and long-term manufacturability.
Supply support for BC846BLT1 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, delivering power management, analog, sensing, and connectivity solutions.
The BC846BLT1 belongs to onsemi's general-purpose bipolar transistor product line, designed for cost-effective, reliable switching and amplification in industrial, consumer, and computing applications.
FAQ
What is the maximum collector-emitter voltage rating for BC846BLT1?
The BC846BLT1 has a maximum collector-emitter voltage (VCEO) rating of 65 V DC. This value is specified at IC = 10 mA and defines the upper limit before avalanche breakdown occurs. Exceeding this voltage risks permanent device failure, and design margins should maintain operation below 80% of 65 V (i.e., ≤52 V) for long-term reliability in industrial environments.
What does the 'B' suffix in BC846BLT1 indicate?
The 'B' in BC846BLT1 denotes the DC current gain (hFE) bin: 200–450 at IC = 10 mA and VCE = 5 V. This tighter gain range differentiates it from BC846ALT1 (110–220) and supports more predictable biasing in amplifier and switching circuits without manual gain sorting.
Is BC846BLT1 RoHS-compliant and lead-free?
Yes, BC846BLT1 is RoHS-compliant and manufactured with a Pb-free finish per EU Directive 2011/65/EU. Its SOT-23 package meets J-STD-020 moisture sensitivity level 1, allowing floor life unlimited at ≤30 °C/60% RH and compatibility with standard lead-free reflow profiles peaking at 260 °C.
What is the thermal resistance of BC846BLT1 on a standard FR-5 PCB?
On a standard FR-5 board (1.0 × 0.75 × 0.062 in), the BC846BLT1 has a junction-to-ambient thermal resistance (RJA) of 556 °C/W at TA = 25 °C. This results in a maximum power dissipation of 225 mW, derating by 1.8 mW/°C above 25 °C ambient - critical for thermal design in enclosed enclosures or high-density layouts.
Can BC846BLT1 replace BC846ALT1 in existing designs?
Yes, BC846BLT1 can replace BC846ALT1 in most designs due to identical package, pinout, and absolute maximum ratings. The primary difference is higher and tighter hFE (200–450 vs. 110–220), which may improve gain stability but could require minor bias resistor adjustment in precision amplifier stages.
BC846BLT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Transistor Type:
- -
- Current - Collector (Ic) (Max):
- -
- Voltage - Collector Emitter Breakdown (Max):
- -
- Vce Saturation (Max) @ Ib, Ic:
- -
- Current - Collector Cutoff (Max):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- -
- Power - Max:
- -
- Frequency - Transition:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
BC846BLT1 FAQ
1.How can I place an order for BC846BLT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC846BLT1 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 BC846BLT1 reliable?
The price and inventory of BC846BLT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC846BLT1 is usually 5 days.
3.What payment methods are accepted for BC846BLT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC846BLT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC846BLT1?
BC846BLT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC846BLT1 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 BC846BLT1?
For technical support, including BC846BLT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC846BLT1 requirements.
6.How does Aetrix verify that BC846BLT1 is sourced from the original manufacturer or authorized distributors?
All BC846BLT1 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 BC846BLT1 meets industry standards.
7.What is the process for return or replacement of BC846BLT1?
All BC846BLT1 units undergo pre-shipment inspection (PSI). If there is an issue with BC846BLT1, 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 BC846BLT1 part is unused and in its original packaging.
Return procedure for BC846BLT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC846BLT1 Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
-
MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
-
MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
-
MMBT2222ALT1G
onsemi
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