onsemi MCH3245-TL-E

Overview

MCH3245-TL-E from onsemi is a PNP bipolar junction transistor in MCPH3 (SC-70/SOT-323) package, rated for −50 V V_CEO, −2 A I_C, and 0.8 W power dissipation at T_a = 25°C on ceramic substrate. It delivers low V_CE(sat) of −130 mV (typ) at I_C = −1 A / I_B = −50 mA and f_T = 420 MHz, enabling high-efficiency switching in compact relay and lamp driver circuits.

For engineers reviewing the MCH3245-TL-E datasheet, pinout, applications, or equivalent options, key selection criteria include verified PNP polarity, −50 V breakdown rating, ultrasmall 0.85 mm mounting height, and confirmed 420 MHz gain-bandwidth product under specified test conditions.

Technical Context

The MCH3245-TL-E is a discrete PNP BJT optimized for medium-power linear and switching applications. Its design emphasizes low saturation voltage (−130 mV typ), high-speed switching (t_on = 35 ns, t_f = 24 ns), and robust thermal performance with 150°C maximum junction temperature.

It operates within a validated −55°C to +150°C storage range and supports pulsed collector current up to −4 A. The device uses onsemi's MBIT process and is characterized with strict DC gain (h_FE = 200–560 at V_CE = −2 V, I_C = −100 mA) and output capacitance (C_ob = 8 pF typ at V_CB = −10 V).

Key Specifications

Pinout & Package

MCH3245-TL-E is housed in the MCPH3 package (JEITA SC-70 / JEDEC SOT-323), measuring 2.1 × 1.6 × 0.85 mm with 0.65 mm lead pitch and 0.007 g mass. Mounting height of 0.85 mm enables ultra-slim end-equipment integration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCH3245-TL-E, MMBT3906LT1G trades 10 V breakdown margin and 170 MHz bandwidth for broader distributor availability, while DXT3906PSQ-13 adds dual-device integration and +10 V V_CEO at the cost of reduced f_T and no single-device footprint equivalence.

Availability

MCH3245-TL-E is available at Aetrix Electronics and suitable for relay drivers, lamp drivers, and motor drivers requiring stable component supply, RoHS-compliant packaging, and consistent parametric performance across production batches.

Supply support for MCH3245-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 management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The MCH3245-TL-E belongs to onsemi's general-purpose bipolar transistor product line, engineered for high-reliability discrete switching in space-constrained, thermally demanding applications such as portable instrumentation and industrial controls.

FAQ

What is the polarity and transistor type of the MCH3245-TL-E?

The MCH3245-TL-E is a PNP bipolar junction transistor. Its polarity is explicitly confirmed in the official datasheet: "(–)50V, (–)2A, Low V_CE(sat), (PNP)NPN Single MCPH3" - with the first parenthetical "(–)50V" and "(PNP)" designation applying to MCH3245. Absolute maximum ratings (e.g., V_CEO = −50 V) and electrical characteristics (e.g., V_CE(sat) = −130 mV) use negative values consistent with PNP convention. The MCH3245-TL-E must be biased with emitter at higher potential than collector to operate.

What is the exact package type and footprint compatibility of the MCH3245-TL-E?

The MCH3245-TL-E uses the MCPH3 package, which is mechanically and dimensionally identical to JEITA SC-70 and JEDEC SOT-323 standards. Its outline drawing confirms 2.1 mm × 1.6 mm body size, 0.65 mm lead pitch, and 0.85 mm maximum mounting height. Land pattern recommendations in the datasheet match standard SOT-323 footprints, making the MCH3245-TL-E compatible with existing SOT-323 reflow and inspection processes without layout modification.

Does the MCH3245-TL-E support pulsed operation beyond its DC current rating?

Yes, the MCH3245-TL-E supports pulsed collector current up to −4 A (I_CP), as specified in the Absolute Maximum Ratings table. This rating applies under defined pulse conditions: single pulse, width <10 μs, duty cycle ≤1%, and ambient temperature ≤25°C. The datasheet provides transient thermal curves (No.8211-5/8) validating safe operation at I_CP = −4 A with proper PCB copper area and thermal management. For sustained pulses, derating per PC–Ta curve is required.

What is the guaranteed minimum DC current gain (h_FE) for the MCH3245-TL-E at operating conditions?

The MCH3245-TL-E has a minimum DC current gain (h_FE) of 200, tested at V_CE = −2 V and I_C = −100 mA per the Electrical Characteristics table. This value is guaranteed across the full production lot and applies at T_a = 25°C. The datasheet also specifies typical h_FE = 560 under the same conditions, with variation across temperature (e.g., reduced gain at −25°C and 75°C) shown in Figure No.8211-3/8.

Is the MCH3245-TL-E RoHS-compliant and lead-free?

Yes, the MCH3245-TL-E is RoHS-compliant and lead-free. The Ordering Information table explicitly lists "Pb Free" for MCH3145-TL-E and "VR" (indicating lead-free, RoHS-compliant variant) for MCH3245-TL-E. The "TL" suffix denotes tape-and-reel packaging, and the "E" suffix confirms compliance with JEDEC JS709B and RoHS Directive 2011/65/EU. Full material declarations and exemption status are available in onsemi's official compliance documentation.