onsemi MJD41CTFCTF

Overview

MJD41CTFCTF from onsemi is an NPN silicon power transistor in DPAK (TO-252) package, rated for 100 V_CEO, 6 A continuous collector current, and 20 W total power dissipation at T_C = 25°C. It delivers h_FE ≥ 30 at I_C = 0.3 A and V_CE = 4 V, with V_CE(sat) ≤ 1.5 V at I_C = 6 A / I_B = 600 mA - designed for low-speed switching and linear amplifier applications in industrial power supplies and motor drivers.

For engineers reviewing the MJD41CTFCTF datasheet, pinout, applications, or equivalent options, key selection criteria include its 100 V blocking capability, surface-mount DPAK thermal performance (R_JC = 6.25 °C/W), ESD robustness (HBM Class 3B, 8 kV), Pb-free compliance, and functional similarity to legacy TIP41C in high-current DC control circuits.

Technical Context

This NPN bipolar junction transistor operates as a medium-power, general-purpose switching and amplification device. Its design targets stable DC gain (h_FE = 30–75) across I_C = 0.3–3 A, with low saturation voltage and validated safe operating area up to 150°C junction temperature under pulsed conditions.

Thermal management is enabled by the DPAK-3 package's low R_JC (6.25 °C/W) and defined pad layout per Case 369D. Electrical behavior includes f_T = 3 MHz at I_C = 500 mA, V_BE(on) ≈ 2 V, and robust off-state leakage (I_CEO ≤ 50 µA at V_CE = 60 V).

Key Specifications

Pinout & Package

Package: DPAK-3 (Case 369D), surface-mount plastic package with exposed drain pad for thermal enhancement. Dimensions per ON Semiconductor drawing Issue B: 6.20 mm × 6.17 mm × 1.60 mm (L × W × H), 4-terminal configuration with dual collector leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STP16NF06L and TIP41C, the MJD41CTFCTF offers surface-mount compatibility, superior thermal coupling via DPAK's exposed pad, and proven linearity for analog use - making it optimal for cost-sensitive, medium-frequency industrial controls where BJT characteristics are preferred.

Availability

MJD41CTFCTF is available at Aetrix Electronics and suitable for industrial motor drives, linear power supplies, relay driver modules, and DC-DC converter auxiliary switches requiring stable component supply and long-term manufacturability.

Supply support for MJD41CTFCTF 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 consumer markets.

The MJD41CTFCTF belongs to onsemi's complementary power transistor family designed for rugged, cost-effective switching and amplification in surface-mount industrial power systems - emphasizing reliability, thermal performance, and drop-in compatibility with legacy through-hole equivalents.

FAQ

What is the maximum junction temperature rating for the MJD41CTFCTF?

The MJD41CTFCTF has an operating junction temperature range of −65°C to +150°C, as specified in its Absolute Maximum Ratings table. This allows deployment in harsh environments such as industrial motor controllers and outdoor power supplies, provided thermal design maintains T_J ≤ 150°C under worst-case power dissipation and ambient conditions. Derating curves in Figure 1 confirm usable power down to T_C = 125°C.

Does the MJD41CTFCTF require a heatsink in typical applications?

Yes - the MJD41CTFCTF requires thermal management when dissipating more than ~2–3 W continuously. With R_JA = 71.4 °C/W (surface-mounted on minimum recommended pads), even 1 W of dissipation raises junction temperature by ~71°C above ambient. For full 6 A / 1.5 V_CE(sat) operation (~9 W), a heatsink or large copper pour is essential to keep T_J within 150°C. The low R_JC = 6.25 °C/W enables efficient heat transfer to external thermal mass.

Is the MJD41CTFCTF pin-compatible with the TIP41C?

No - the MJD41CTFCTF uses a 4-pin DPAK-3 (Case 369D) surface-mount package with pins 1=Base, 2=Collector, 3=Emitter, 4=Collector, whereas the TIP41C uses a 3-pin TO-220 through-hole package with pins 1=Base, 2=Collector, 3=Emitter. While their electrical specs align closely, PCB layout and assembly processes differ significantly; MJD41CTFCTF is not a drop-in replacement without footprint redesign.

What is the typical DC current gain (h_FE) of the MJD41CTFCTF at 3 A collector current?

Per the Electrical Characteristics table, the MJD41CTFCTF guarantees h_FE ≥ 15 at I_C = 3 A, V_CE = 4 V, and T_C = 25°C. Typical curves (Figure 3) show h_FE ≈ 25–35 under those conditions, confirming sufficient gain for stable base drive design in switching applications. This value supports reliable saturation with I_B ≥ 200 mA at full 6 A load.

Can the MJD41CTFCTF be used in linear amplifier configurations?

Yes - the MJD41CTFCTF is explicitly characterized for linear operation, with verified Safe Operating Area (SOA) up to 150°C (Figure 10), low distortion potential due to predictable h_FE and V_BE behavior, and f_T = 3 MHz enabling bandwidth up to ~20 kHz. Its SOA curve confirms stability under DC and pulsed linear loads, making it suitable for Class AB audio output stages and precision current sources when properly heatsinked.