onsemi BC807-25LT3

Overview

BC807-25LT3 from onsemi is a PNP silicon general-purpose transistor in SOT-23 package, rated for −45 V V_CEO, −500 mA I_C, and 225 mW power dissipation on FR-4 board; it delivers h_FE = 160–400 at I_C = −100 mA/V_CE = −1.0 V and is widely used in low-voltage switching and linear amplification circuits in industrial control modules.

For engineers reviewing the BC807-25LT3 datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, thermal derating behavior, SOT-23 terminal mapping, AEC-Q101 qualification status, and direct alternatives with documented h_FE and V_CE(sat) differences for discrete BJT selection.

Technical Context

The BC807-25LT3 operates as a medium-current PNP bipolar junction transistor optimized for DC switching and analog amplification in ambient temperatures from −55°C to +150°C. Its base-emitter turn-on voltage is −1.2 V at I_C = −500 mA, and saturation occurs at V_CE(sat) ≤ −0.7 V with I_B = −50 mA.

It exhibits f_T = 100 MHz at I_C = −10 mA/V_CE = −5 V, C_obo = 10 pF at V_CB = −10 V, and thermal resistance R_JA = 436°C/W on standard FR-4 PCB - confirming suitability for compact, thermally constrained designs requiring stable current gain across temperature.

Key Specifications

Pinout & Package

SOT-23 (Case 318, Style 6) surface-mount plastic package with gull-wing leads; 3-terminal configuration optimized for automated placement and reflow soldering on high-density PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP general-purpose transistor applications.

Compared with BC807-25LT3, BC807-25LT1G offers identical performance in smaller reels for flexibility, while MMBT2907ALT1G extends voltage capability at the cost of reduced current gain - enabling design trade-offs between safety margin and signal fidelity in PNP switching nodes.

Availability

BC807-25LT3 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and consumer power management systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for BC807-25LT3 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 (Nasdaq: ON) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The BC807 series belongs to onsemi's general-purpose bipolar transistor portfolio, designed specifically for cost-sensitive, high-reliability discrete switching and amplification in space-constrained PCB layouts.

FAQ

What is the maximum continuous collector current rating for BC807-25LT3?

The BC807-25LT3 has a maximum continuous collector current (I_C) rating of −500 mA at T_A = 25°C. This rating assumes proper PCB thermal management per the FR-4 board condition (1 oz. Cu, 100 mm²). Derating applies above 25°C at 1.8 mW/°C, and actual usable current depends on layout, ambient temperature, and airflow. The BC807-25LT3 must not be operated beyond this limit without verifying junction temperature rise using R_JA = 436°C/W.

Is BC807-25LT3 qualified for automotive applications?

Yes, BC807-25LT3 is AEC-Q101 qualified and PPAP capable, meeting stress test requirements for temperature cycling, highly accelerated life testing (HALT), and electrostatic discharge (ESD) per automotive standards. It is explicitly marked with "S" prefix variants (e.g., SBC807-25LT3G) for automotive use, but the standard BC807-25LT3 shares the same die and qualification - making it suitable for non-safety-critical automotive subsystems like lighting controls and HVAC interfaces.

What is the guaranteed DC current gain (h_FE) range for BC807-25LT3?

The BC807-25LT3 guarantees h_FE = 160 to 400 at I_C = −100 mA and V_CE = −1.0 V, and h_FE ≥ 40 at I_C = −500 mA under the same conditions. This "25" suffix denotes the mid-range h_FE bin within the BC807 family (vs. "16" = 100–250, "40" = 250–600). The BC807-25LT3 maintains this gain stability across −55°C to +150°C junction temperature.

Does BC807-25LT3 have Pb-free and RoHS-compliant packaging?

Yes, BC807-25LT3 is manufactured in a Pb-free, halogen-free/BFR-free package and fully complies with the EU RoHS Directive 2011/65/EU. The "G" suffix in part numbers like BC807-25LT3G explicitly denotes Green (RoHS-compliant) packaging, and the BC807-25LT3 datasheet confirms compliance for all LT3G variants. Lead finish is matte tin, and no lead content is present in die attach, mold compound, or terminations.

What is the thermal resistance (R_JA) of BC807-25LT3 on standard PCB?

The BC807-25LT3 has a thermal resistance R_JA of 436°C/W when mounted on an FR-4 board with 1 oz. copper and 100 mm² pad area (per Note 1 in the datasheet). On alumina substrate, R_JA improves to 417°C/W. These values define the temperature rise from junction to ambient per watt of dissipated power - critical for calculating maximum allowable power at elevated ambient temperatures. The BC807-25LT3 must be thermally modeled using these figures to avoid exceeding T_J(max) = +150°C.