Diodes Incorporated BCW68HTC

Overview

BCW68HTC from ON Semiconductor is a PNP silicon planar medium-power transistor in SOT-23 package, rated for V_CEO = −45 V, I_C = −800 mA, P_tot = 330 mW at T_amb = 25°C, with h_FE = 180–250 at I_C = −10 mA and V_CE = −1 V, used in low-voltage DC-DC converter bias circuits and discrete load switches.

For engineers reviewing the BCW68HTC datasheet, BCW68HTC pinout, BCW68HTC application, or BCW68HTC equivalent, key selection factors include guaranteed h_FE range at high I_C, V_CES = −60 V rating, SOT-23 thermal resistance (R_θJA ≈ 450°C/W), and verified switching performance (t_on = 100 ns, t_off = 400 ns) under pulsed conditions.

Technical Context

This PNP transistor operates in linear amplification and saturated switching modes, with V_BE(sat) = −2 V at I_C = −500 mA / I_B = −50 mA and V_CE(sat) = −0.3 V under same conditions. Its f_T = 100 MHz supports audio-frequency amplification and fast-switching control loops.

Designed for medium-power discrete gain stages, it features C_cbo = 12–18 pF and C_ebo = 80 pF at specified bias points, enabling stable operation in feedback networks up to ~10 MHz. Noise figure is 2–10 dB at I_C = −0.2 mA, suitable for low-noise preamp input stages.

Key Specifications

Pinout & Package

SOT-23 plastic surface-mount package with standard 3-pin configuration (E, B, C) and JEDEC TO-236AB outline; footprint compatible with automated pick-and-place and reflow soldering.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP medium-power transistor applications.

Compared with BCW68G and MMBT6800, BCW68HTC offers superior h_FE consistency at mid-current levels and higher V_CES, making it optimal for industrial power supply bias and relay driving where thermal margin and gain stability are critical.

Availability

BCW68HTC is available at Aetrix Electronics and suitable for DC-DC converter bias stages, industrial relay drivers, LED current sinks, and audio pre-amplifier stages requiring stable component supply and extended temperature operation.

Supply support for BCW68HTC 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 supplier specializing in energy-efficient power management, analog, and sensor solutions for automotive, industrial, and cloud infrastructure markets.

BCW68HTC belongs to the BCW6x family of general-purpose PNP transistors designed for medium-power linear and switching applications in space-constrained industrial controls and power supplies.

FAQ

What is the maximum allowable base current for BCW68HTC?

The absolute maximum base current is −100 mA, as specified in the Absolute Maximum Ratings table. Exceeding this risks metallization failure or bond wire damage. For reliable operation, design base drive to stay within −50 mA continuous, especially at elevated temperatures, using the h_FE min value (180) to size the base resistor.

Does BCW68HTC support operation at 150°C junction temperature?

Yes - its T_j range is −55°C to +150°C. At T_j = 150°C, I_CES rises to −20 nA (max) and h_FE decreases by ~25% versus 25°C. Derate P_tot linearly to zero at 150°C using R_θJA = 450°C/W; full-rated current is only permissible below ~85°C ambient with minimal PCB copper.

Can BCW68HTC replace BCW68G in existing designs?

Yes, with verification of h_FE-dependent performance. BCW68HTC has higher minimum h_FE (180 vs. 120), reducing required base drive by ~33%. Check saturation voltage at target I_C; both share identical V_CE(sat) specs, so no layout change is needed unless base resistor was sized for worst-case BCW68G gain.

Is SPICE model data available for BCW68HTC?

Yes - ON Semiconductor provides verified SPICE parameter sets upon request for BCW68HTC, including Gummel-Poon model coefficients extracted from measured DC and transient characteristics. These models support accurate simulation of switching behavior, thermal effects, and frequency response in tools like LTspice and PSpice.