Nexperia USA Inc. BC807K-40R

Overview

BC807K-40R from Nexperia is a PNP general-purpose bipolar junction transistor (BJT) in SOT23 (TO-236AB) package, rated for −45 V V_CEO, −500 mA I_C, and DC current gain (h_FE) of 250–600 at V_CE = −1 V, I_C = −100 mA. It delivers low V_CE(sat) (−700 mV max at I_C = −500 mA, I_B = −50 mA) and is AEC-Q101 qualified for automotive-grade reliability. It serves as a compact, surface-mount switch or linear amplifier in power management and signal conditioning circuits.

For engineers reviewing the BC807K-40R datasheet, BC807K-40R pinout, BC807K-40R application, or BC807K-40R equivalent, this page provides verified electrical parameters, thermal derating curves, SOT23 pin mapping, automotive qualification status, and direct alternatives with documented h_FE and saturation voltage differences.

Technical Context

The BC807K-40R operates as a silicon PNP BJT with base-controlled current amplification, optimized for switching and analog amplification in ambient temperatures from −55 °C to +150 °C. Its design supports pulsed operation up to 1 A peak collector current (t_p ≤ 1 ms) and features low emitter capacitance (37 pF typical at V_EB = −0.5 V), enabling stable performance in moderate-frequency (<80 MHz f_T) applications.

Thermal behavior is defined by junction-to-ambient resistance ranging from 157 K/W (4-layer PCB, 1 cm² collector pad) to 358 K/W (single-sided FR4, standard footprint). Safe operating area (SOA) curves confirm continuous conduction capability up to −500 mA at −5 V V_CE, with derating above 25 °C ambient per Figure 1.

Key Specifications

Pinout & Package

SOT23 (TO-236AB) plastic surface-mounted package with 3 leads; 1.3 mm × 2.9 mm × 1.1 mm body dimensions; tin-plated terminations compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC807-40 and MMBT3906, BC807K-40R offers superior automotive qualification, higher continuous current capability (−500 mA vs −200 mA), tighter h_FE distribution, and better thermal performance-making it the preferred choice for safety-critical or high-reliability embedded systems.

Availability

BC807K-40R is available at Aetrix Electronics and suitable for automotive door modules, industrial PLC output stages, consumer appliance power control, and medical diagnostic equipment requiring stable component supply and AEC-Q101 compliance.

Supply support for BC807K-40R 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 semiconductor expert focused on essential semiconductors, delivering high-performance, reliable components for automotive, industrial, and consumer markets with emphasis on efficiency and miniaturization.

The BC807K series belongs to Nexperia's general-purpose transistor product line, designed specifically for robust, high-volume switching and amplification tasks in space-constrained, thermally demanding applications-including automotive ECUs and industrial control units.

FAQ

What is the maximum allowable junction temperature for BC807K-40R?

The absolute maximum junction temperature (T_j) is 150 °C, as specified in Table 6 of the datasheet. Operation beyond this limit risks permanent degradation of h_FE, increased leakage, and bond-wire failure. Thermal design must ensure T_j = T_amb + (P_diss × R_th(j-a)) remains below 150 °C under worst-case ambient and power conditions.

Is BC807K-40R pin-compatible with BC847 or MMBT3906?

Yes-BC807K-40R uses the standard SOT23 (TO-236AB) package with identical 1–2–3 pinout (B–E–C), matching BC847 (NPN) and MMBT3906 (PNP) footprints. However, electrical characteristics differ significantly: BC807K-40R supports −500 mA I_C and AEC-Q101 qualification, while MMBT3906 is rated for only −200 mA and lacks automotive qualification.

How does the h_FE variation affect base resistor selection?

With h_FE spanning 250–600, base resistor (R_B) must be sized for worst-case minimum gain to guarantee saturation. For I_C = −500 mA and minimum h_FE = 250, required I_B ≥ −2 mA → R_B ≤ (V_GPIO − V_BE)/2 mA. Using V_BE = −0.85 V and 3.3 V GPIO yields R_B ≤ 1.2 kΩ. Oversizing R_B risks incomplete turn-on and excessive V_CE(sat).

Can BC807K-40R replace BC807-40 in existing designs?

Yes-BC807K-40R is a drop-in replacement for BC807-40 with identical pinout, voltage/current ratings, and h_FE range. Key improvements include AEC-Q101 qualification, higher P_tot (800 mW vs 625 mW), and tighter process control. No layout or schematic changes are needed, though thermal validation is recommended if operating near previous device's power limits.