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onsemi BC80740MTF
- Part No.:
- BC80740MTF
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BC80740MTF.pdf
- Description:
- TRANS PNP 45V 0.8A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,846
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Product details
Overview
BC80740MTF from ON Semiconductor is a PNP epitaxial silicon transistor in SOT-23 package, rated for -50 V C-E breakdown voltage, -800 mA DC collector current, and 310 mW power dissipation. It delivers hFE of 250–630 at -100 mA, supports switching and low-power amplifier roles in AF driver stages, and operates up to 150°C junction temperature.
For engineers reviewing the BC80740MTF datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, thermal characteristics, SOT-23 terminal mapping, and direct alternatives for discrete PNP transistor selection in space-constrained consumer and industrial circuits.
Technical Context
The BC80740MTF is part of the BC807/BC808 family designed as complementary PNP counterparts to BC817/BC818 NPN transistors. Its hFE classification "40" denotes minimum DC current gain of 250 at -100 mA and 60 at -300 mA, with guaranteed -0.7 V VCE(sat) at -500 mA/-50 mA drive.
It features -5 V emitter-base breakdown rating, -100 nA ICES at -25 V, and 100 MHz fT under standard test conditions (VCE = -5 V, IC = -10 mA), supporting audio-frequency amplification and digital switching up to several MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -45 V - Maximum safe collector-emitter voltage before breakdown in common-emitter configuration |
| VCES | -50 V - Higher breakdown tolerance with base open, enabling robust operation in saturated switch designs |
| IC (DC) | -800 mA - Continuous collector current handling capacity, suitable for medium-current load switching |
| hFE (min) | 250 @ -100 mA - Ensures reliable current amplification in linear amplifier stages without excessive base drive |
| VCE(sat) | -0.7 V @ -500 mA - Low saturation voltage minimizes conduction loss and heat generation in switching applications |
| fT | 100 MHz - Supports high-frequency small-signal amplification and fast digital switching transitions |
| PD | 310 mW - Power dissipation limit at 25°C ambient, derating by 2.48 mW/°C above that temperature |
Pinout & Package
SOT-23 (JEDEC TO-236AB) 3-lead surface-mount package with 1.3 mm × 2.9 mm footprint, 1.1 mm max height, and gull-wing leads. Designed for automated placement and reflow soldering on compact PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Control input | Receives forward-biased current to turn on PNP conduction; requires negative voltage relative to emitter |
| 2 (Emitter) | Current source terminal | Connected to higher potential rail (e.g., VCC) in common-emitter switch configurations |
| 3 (Collector) | Output terminal | Delivers controlled current to load; polarity inverted relative to NPN devices in same circuit topology |
Key Features
| Feature | Design Value |
|---|---|
| High hFE classification "40" | 250–630 gain range ensures stable biasing across production lots and temperature, reducing need for trim resistors |
| Low VCE(sat) | -0.7 V at -500 mA enables efficient switching in battery-powered and thermally constrained systems |
| Complementary pairing | Direct counterpart to BC817/BC818 NPN transistors, simplifying push-pull and differential stage design |
| Robust thermal performance | RθJA = 403°C/W allows >100 mW usable power at 60°C ambient without heatsinking in standard FR-4 layouts |
Applications
| Audio Frequency Driver | Low-Power Switching Regulator |
|---|---|
Use Scenario: Driving 8 Ω speaker loads in portable audio amplifiers with single-supply rails. IC Role / Device Role / Timing Role: PNP emitter-follower buffer stage providing current gain and impedance matching between op-amp output and speaker. Use Value: High hFE (250–630) and low VCE(sat) (-0.7 V) minimize distortion and power loss during peak current delivery. | Use Scenario: Active pull-down element in synchronous buck converter gate drive circuits. IC Role / Device Role / Timing Role: Fast-turn-off PNP switch controlling NMOS gate discharge path during dead-time intervals. Use Value: 100 MHz fT and low Cob (12 pF) support clean, sub-100 ns switching transitions without shoot-through risk. |
| LED Current Sink | Industrial Sensor Interface |
Use Scenario: Constant-current sink for indicator LEDs in PLC I/O modules operating from 24 V rails. IC Role / Device Role / Timing Role: Linear current regulator using emitter resistor feedback, configured as grounded-emitter switch. Use Value: -50 V VCES rating provides margin against inductive kickback from relay coils sharing same supply rail. | Use Scenario: Level-shifting interface between 3.3 V microcontroller GPIO and 12 V analog sensor outputs. IC Role / Device Role / Timing Role: Inverting level translator converting logic-high signals to active-low enable pulses for analog front-end ICs. Use Value: Guaranteed -100 nA ICES ensures minimal leakage-induced offset errors in precision 12-bit ADC reference paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC80725MTF | Lower hFE range (160–400) and reduced fT (80 MHz); otherwise identical package, ratings, and pinout | Better suited for cost-sensitive switching where gain margin is less critical than in linear amplification | Select BC80725MTF when design tolerates lower gain and reduced bandwidth, enabling BOM consolidation across non-critical nodes |
| MMBT3906LT1G | Same SOT-23 package but lower IC (-200 mA), lower VCEO (-40 V), and narrower hFE range (100–300) | Appropriate for low-current signal switching only; not suitable for >300 mA load drive or high-voltage rails | Choose MMBT3906LT1G only for ultra-low-power logic-level translation where BC80740MTF's capability exceeds requirements |
Compared with BC80725MTF and MMBT3906LT1G, BC80740MTF offers the highest DC gain and widest voltage margin in the SOT-23 PNP portfolio, making it optimal for analog amplification and medium-current switching where headroom and linearity are prioritized.
Availability
BC80740MTF is available at Aetrix Electronics and suitable for audio driver stages, LED current regulation, industrial sensor interfaces, and low-power switching regulators requiring stable component supply and consistent parametric performance across production batches.
Supply support for BC80740MTF 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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The BC807/BC808 series was developed by Fairchild (now ON Semiconductor) to deliver standardized, high-reliability PNP transistors for general-purpose amplification and switching in space-constrained PCBs.
FAQ
What is the maximum continuous collector current rating for BC80740MTF?
The BC80740MTF has a maximum DC collector current rating of -800 mA at TA = 25°C. This value decreases with rising ambient temperature due to its 2.48 mW/°C derating coefficient, requiring thermal design consideration above 25°C. The BC80740MTF maintains specified electrical performance within this limit when operated with proper PCB copper area and airflow.
Does BC80740MTF have a documented pin-to-pin replacement?
No official pin-to-pin replacement is documented for BC80740MTF. While BC80725MTF shares identical SOT-23 pinout and absolute maximum ratings, its lower hFE and fT may affect performance in gain-critical or high-speed applications. Always verify circuit behavior with the specific variant before substitution. The BC80740MTF must be evaluated independently per application.
What is the typical current gain (hFE) of BC80740MTF at -300 mA collector current?
At VCE = -1 V and IC = -300 mA, the BC80740MTF exhibits hFE in the range of 170–400, per its "40" classification group. This is distinct from its -100 mA hFE range (250–630) and reflects expected gain compression at higher currents. Designers should use the minimum value (170) for worst-case bias calculations in BC80740MTF circuits.
Can BC80740MTF be used in place of BC80840MTF?
No - BC80740MTF and BC80840MTF are not interchangeable. BC80740MTF has -50 V VCES and -45 V VCEO, while BC80840MTF is rated for only -30 V VCES and -25 V VCEO. Substituting BC80740MTF for BC80840MTF is acceptable if voltage margin is needed, but the reverse risks catastrophic failure. Both share same hFE classification and package, but BC80740MTF is the higher-voltage variant.
What is the thermal resistance (RθJA) of BC80740MTF in standard SOT-23 mounting?
The BC80740MTF has a junction-to-ambient thermal resistance (RθJA) of 403°C/W when mounted on a standard FR-4 PCB (76 mm × 114 mm × 1.57 mm) with minimum land pattern. This value assumes no additional copper pour or thermal vias. Adding 100 mm² of 2 oz copper connected to the emitter pad reduces RθJA by ~30%, directly improving BC80740MTF's usable power handling in thermally demanding layouts.
BC80740MTF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 800 mA
- Voltage - Collector Emitter Breakdown (Max):
- 45 V
- Vce Saturation (Max) @ Ib, Ic:
- 700mV @ 50mA, 500mA
- Current - Collector Cutoff (Max):
- 100nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 250 @ 100mA, 1V
- Power - Max:
- 310 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BC80740MTF FAQ
1.How can I place an order for BC80740MTF through Aetrix?
Please submit a Request for Quotation (RFQ) for BC80740MTF 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 BC80740MTF reliable?
The price and inventory of BC80740MTF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC80740MTF is usually 5 days.
3.What payment methods are accepted for BC80740MTF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC80740MTF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC80740MTF?
BC80740MTF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC80740MTF 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 BC80740MTF?
For technical support, including BC80740MTF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC80740MTF requirements.
6.How does Aetrix verify that BC80740MTF is sourced from the original manufacturer or authorized distributors?
All BC80740MTF 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 BC80740MTF meets industry standards.
7.What is the process for return or replacement of BC80740MTF?
All BC80740MTF units undergo pre-shipment inspection (PSI). If there is an issue with BC80740MTF, 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 BC80740MTF part is unused and in its original packaging.
Return procedure for BC80740MTF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC80740MTF Tags
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