onsemi MCH3205-TL-E

Overview

MCH3205-TL-E from onsemi is a PNP bipolar junction transistor in MCPH3 (SC-70/SOT-323) package, rated for −50 V V_CEO, −3 A I_C, with low V_CE(sat) of −140 mV (typ) at I_C = −2 A / I_B = −100 mA, high-speed switching (t_on = 35 ns), and 0.8 W power dissipation on ceramic substrate - used in motor drivers, relay drivers, and DC/DC converters.

For engineers reviewing the MCH3205-TL-E datasheet, pinout, applications, or equivalent options, key selection criteria include verified PNP polarity, −50 V breakdown rating, low saturation voltage under high-current drive, thermal performance on standard PCB substrates, and compatibility with automated SMT assembly for space-constrained power control circuits.

Technical Context

The MCH3205-TL-E is a discrete PNP BJT optimized for medium-power linear and switching applications. It features FBET/MBIT process technology enabling high current gain (h_FE = 200–560 at V_CE = −2 V, I_C = −100 mA) and high f_T of 380 MHz (typ) at V_CE = −10 V, I_C = −500 mA.

Its ultrasmall MCPH3 package (2.1 × 1.6 × 0.85 mm) supports miniaturized designs with mounting height ≤ 0.85 mm. Electrical behavior is characterized across temperature (−25°C to +75°C) and includes validated saturation performance at I_C = −2 A with I_B/I_C = 0.05, confirming suitability for robust base-driven switching.

Key Specifications

Pinout & Package

Package: MCPH3 (JEITA SC-70 / JEDEC SOT-323), 3-pin surface-mount, 2.1 mm × 1.6 mm footprint, 0.85 mm max height, 0.007 g mass.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP bipolar transistor applications.

Compared with MCH3205-TL-E, MMBT3906LT1G offers smaller size but insufficient current handling for relay/motor loads, while PN2907A provides higher voltage margin but lacks SMT compatibility and speed - making MCH3205-TL-E optimal for modern, high-density, medium-power PNP switching.

Availability

MCH3205-TL-E is available at Aetrix Electronics and suitable for relay drivers, lamp drivers, and DC/DC converter circuits requiring stable component supply, RoHS-compliant packaging, and consistent tape-and-reel delivery.

Supply support for MCH3205-TL-E 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and IoT applications.

The MCH3205-TL-E belongs to onsemi's discrete bipolar transistor product line, engineered for high-reliability, medium-current switching in space-constrained power control systems - emphasizing low saturation voltage, fast response, and robust thermal performance.

FAQ

What is the polarity and transistor type of the MCH3205-TL-E?

The MCH3205-TL-E is a PNP bipolar junction transistor. Its polarity is confirmed by absolute maximum ratings (e.g., −50 V V_CEO, −3 A I_C) and electrical characteristics including negative voltage/current conventions throughout the datasheet. The MCH3205-TL-E operates with emitter at higher potential than collector and base, requiring reverse bias on the base-emitter junction to control conduction.

What is the maximum power dissipation of the MCH3205-TL-E under standard mounting conditions?

The MCH3205-TL-E has a maximum collector dissipation (P_C) of 0.8 W when mounted on a 600 mm² × 0.8 mm ceramic substrate at T_a = 25°C. This value is explicitly specified in the Absolute Maximum Ratings table and validated via thermal derating curves showing linear reduction to zero at T_a = 160°C. The MCH3205-TL-E does not specify P_C for FR-4 PCBs in the provided documentation.

Does the MCH3205-TL-E have a Pb-free and RoHS-compliant construction?

Yes, the MCH3205-TL-E is Pb-free and RoHS-compliant. This is confirmed in the Ordering Information section, which lists "Pb Free" as the memo for MCH3105-TL-E and "VR" for MCH3205-TL-E - both variants share the same Pb-free construction per onsemi's standard qualification. The MCH3205-TL-E complies with JEDEC JS-001 and JESD22-A114 standards for moisture sensitivity level (MSL) 1.

What is the typical gain-bandwidth product (f_T) of the MCH3205-TL-E and under what conditions is it measured?

The typical f_T of the MCH3205-TL-E is 380 MHz, measured at V_CE = −10 V, I_C = −500 mA, and f = 100 MHz (per datasheet Figure 10). This parameter reflects the transistor's high-frequency current gain cutoff and confirms its suitability for fast-switching applications such as gate driving and PWM control. The MCH3205-TL-E maintains usable gain up to ~100 MHz in practical circuit implementations.

How does the MCH3205-TL-E compare to the MCH3105-TL-E in terms of electrical characteristics?

The MCH3205-TL-E and MCH3105-TL-E are complementary PNP/NPN pairs sharing identical package, pinout, and many ratings (e.g., −50 V/80 V breakdown, 3 A current, 0.8 W P_C). Key differences include polarity, V_CE(sat) sign convention, and h_FE test conditions (MCH3205: V_CE = 2 V; MCH3105: V_CE = −2 V). The MCH3205-TL-E is strictly PNP; no NPN functionality is supported.