Nexperia USA Inc. BC817-25,215

Overview

BC817-25,215 from Nexperia is a 45 V, 500 mA NPN general-purpose bipolar junction transistor in SOT23 (TO-236AB) package, with DC current gain (h_FE) of 160–400 at V_CE = 1 V and I_C = 100 mA, collector-emitter saturation voltage ≤700 mV at I_C = 500 mA / I_B = 50 mA, and transition frequency f_T = 100 MHz - used for low-voltage switching and linear amplification in power management and signal conditioning circuits.

For engineers reviewing the BC817-25,215 datasheet, BC817-25,215 pinout, BC817-25,215 application, or BC817-25,215 equivalent, key selection criteria include verified h_FE binning (160–400), thermal resistance (362 K/W on 1 cm² collector pad), peak pulse current capability (1 A), and SOT23 footprint compatibility with automated assembly.

Technical Context

This discrete NPN BJT operates as a current-controlled switch or small-signal amplifier with base-emitter turn-on voltage ≈1.2 V at I_C = 500 mA and exhibits stable gain across −55 °C to +150 °C junction temperature range. Its 45 V V_CEO rating supports operation in 24 V industrial control rails and 3.3/5 V logic-level interfacing.

The device uses silicon planar epitaxial process, features 5 V V_EBO emitter-base breakdown, 100 nA I_CBO leakage at 20 V, and 3 pF collector capacitance - enabling reliable performance in moderate-frequency (<10 MHz) switching and analog gain stages without parasitic oscillation.

Key Specifications

Pinout & Package

SOT23 (TO-236AB) plastic surface-mounted package with 3 leads, 1.3 mm profile, and standard 0.95 mm lead pitch; optimized for reflow soldering per IPC-7095 guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC817-16,215 and BC817-40,215, the BC817-25,215 offers balanced gain (160–400) that reduces sensitivity to temperature-induced h_FE drift while maintaining sufficient margin for reliable saturation in 3.3 V–5 V logic-driven designs.

Availability

BC817-25,215 is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB-C power switching, automotive body control modules, and IoT node load management requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BC817-25,215 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 delivering high-performance, reliable discrete, logic, and MOSFET solutions with focus on efficiency, miniaturization, and robustness for mass-market electronics.

The BC817 series targets cost-sensitive, high-volume applications requiring proven reliability in general-purpose switching and amplification - designed for seamless integration into consumer, industrial, and computing platforms using standard SMT processes.

FAQ

What is the maximum allowable junction temperature for BC817-25,215?

The absolute maximum junction temperature (T_j) is 150 °C per IEC 60134 limiting values. Operation above this threshold causes irreversible degradation of h_FE and increased leakage. Derating is required above 25 °C ambient - for example, at 75 °C ambient, maximum continuous power drops to ~200 mW on standard FR4 footprint.

Does BC817-25,215 support automotive applications?

No - BC817-25,215 is not automotive-qualified. The datasheet explicitly states non-automotive qualification (Rev. 8, Section 13). For automotive use, Nexperia offers the -Q qualified BC817-Q series with AEC-Q101 testing, enhanced HTOL, and guaranteed PPAP documentation.

How does the 160–400 h_FE range affect base resistor calculation?

Designers must size the base resistor using the minimum h_FE (160) to guarantee saturation under worst-case conditions. For 500 mA collector current, required I_B ≥ 3.125 mA; with 3.3 V GPIO and 0.7 V V_BE, R_B ≤ 832 Ω. Using h_FE = 400 would overdesign the drive strength unnecessarily.

Can BC817-25,215 replace BC847 in existing designs?

Only with verification: BC847 has higher V_CEO (50 V vs. 45 V) and different h_FE binning (110–800), but shares SOT23 package and pinout. Substitution requires checking whether 45 V rating suffices for the application's transient conditions and whether 160–400 h_FE meets the original gain margin requirements.