onsemi MJD41CRL

Overview

MJD41CRL from onsemi is an NPN silicon power transistor in DPAK (TO-252) surface-mount package, rated for 100 V_CEO, 6 A continuous collector current, and 20 W total power dissipation at T_C = 25°C. It is designed for general-purpose amplification and low-speed switching in industrial power supplies, motor drivers, and relay drivers.

For engineers reviewing the MJD41CRL datasheet, pinout, applications, or equivalent options, key selection criteria include V_CEO = 100 V, I_C = 6 A, h_FE ≥ 30 at I_C = 0.3 A, V_CE(sat) ≤ 1.5 V at I_C = 6 A, and thermal resistance R_JC = 6.25 °C/W - all critical for thermal-aware linear and switching designs.

Technical Context

The MJD41CRL operates as a medium-power bipolar junction transistor with complementary PNP counterpart MJD42C. Its DC current gain h_FE ranges from 30–75 (I_C = 0.3 A) to 15–75 (I_C = 3 A), supporting stable biasing across load conditions. The device features a maximum f_T of 3 MHz and exhibits V_BE(on) ≤ 2 V at I_C = 6 A, enabling direct drive from logic-level controllers.

Thermal design is constrained by R_JA = 71.4 °C/W (surface-mounted on minimum pad size) and R_JC = 6.25 °C/W, requiring heatsinking for sustained >1.75 W operation at ambient temperature. Safe operating area (SOA) curves confirm capability up to 100 V/6 A under single-pulse conditions at T_J ≤ 150°C.

Key Specifications

Pinout & Package

DPAK-3 (TO-252) plastic surface-mount package per Case 369C, 6.10 × 6.54 × 2.28 mm, with exposed drain pad (pin 2 & 4) thermally connected to collector.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN power transistor applications.

Compared with TIP41C and MJD127, the MJD41CRL delivers identical voltage/current ratings in a surface-mount DPAK package with superior thermal resistance (R_JC = 6.25 °C/W), enabling higher power density and automated assembly - critical for modern industrial power modules and motor controllers.

Availability

MJD41CRL is available at Aetrix Electronics and suitable for industrial power supplies, DC motor drivers, and relay driver circuits requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for MJD41CRL 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, and cloud infrastructure markets.

The MJD41CRL belongs to onsemi's complementary power transistor family designed for robust, cost-effective amplification and switching in industrial controls, power conversion, and motor actuation systems.

FAQ

What is the maximum continuous collector current rating for the MJD41CRL?

The MJD41CRL has a maximum continuous collector current (I_C) rating of 6 A at case temperature T_C = 25°C. This rating assumes proper heatsinking and derates linearly above 25°C at 0.16 W/°C. At ambient temperature (T_A = 25°C), the usable continuous current drops to 1.75 A due to higher thermal resistance to ambient (R_JA = 71.4 °C/W). Always verify actual junction temperature using measured case temperature and R_JC = 6.25 °C/W in your layout.

Is the MJD41CRL pin-compatible with the TIP41C?

No, the MJD41CRL is not pin-compatible with the TIP41C. The MJD41CRL uses a DPAK-3 (TO-252) surface-mount package with pins 1 (Base), 2 (Collector), 3 (Emitter), and 4 (Collector), while the TIP41C uses a through-hole TO-220 package with pins 1 (Emitter), 2 (Base), 3 (Collector). Although their electrical specifications are closely matched, PCB layout and thermal design must be redesigned to accommodate the DPAK footprint and dual-collector thermal pad of the MJD41CRL.

Does the MJD41CRL meet automotive qualification standards?

The standard MJD41CRL is not AEC-Q101 qualified; however, onsemi offers the NJVMJD41CT4G variant - which shares identical electrical and thermal characteristics - specifically qualified to AEC-Q101 and PPAP-capable for automotive applications. That variant includes unique site and control change tracking (NJV prefix) and is intended for engine control, body electronics, and ADAS subsystems where automotive-grade reliability is mandatory. Standard MJD41CRL remains suitable for industrial and commercial use.

What is the typical DC current gain (h_FE) of the MJD41CRL at 3 A collector current?

At I_C = 3 A and V_CE = 4 V, the MJD41CRL exhibits a DC current gain (h_FE) ranging from 15 to 75, per the datasheet's Electrical Characteristics table. This wide range reflects process variation and temperature dependence; design should assume h_FE(min) = 15 for worst-case base drive calculation. At lower currents (I_C = 0.3 A), h_FE improves to 30–75, supporting more efficient bias networks in linear amplifier stages.

Can the MJD41CRL be used in parallel configurations for higher current handling?

Yes, the MJD41CRL can be used in parallel configurations, but requires careful attention to emitter ballasting resistors (typically 0.1–0.5 Ω) to ensure current sharing. Due to h_FE variation and thermal coupling effects, unballasted paralleling risks thermal runaway. The device's positive temperature coefficient for V_BE helps stabilize sharing, but layout symmetry, matched heatsinking, and individual base drive impedance are essential. For >10 A applications, consider dedicated multi-die power modules instead of discrete paralleling.