onsemi MJH11020

Overview

MJH11020 from onsemi is an NPN complementary Darlington silicon power transistor designed for high-current, medium-voltage linear amplification and low-frequency switching in motor control and industrial power stages. It delivers 200 V_CEO(sus) minimum sustaining voltage, 15 A continuous collector current, 150 W total device dissipation at T_C = 25°C, and DC current gain ≥400 at 10 A - enabling robust operation in DC motor drives and relay drivers.

For engineers reviewing the MJH11020 datasheet, pinout, applications, or equivalent options, key selection criteria include its 200 V_CEO(sus), 15 A I_C rating, TO-247/TO-218 package thermal performance (R_JC = 0.83°C/W), V_CE(sat) ≤2.5 V at 10 A, and Darlington architecture requiring base drive optimization.

Technical Context

The MJH11020 implements a monolithic Darlington pair with integrated emitter-follower configuration, delivering high h_FE (≥400 at 10 A) while maintaining safe operating area (SOA) compliance up to 200 V and 15 A under pulsed conditions. Its design targets linear-mode amplification and hard-switching applications where secondary breakdown immunity and thermal stability are critical.

It features low V_BE(on) (2.8 V typical at 10 A) and V_BE(sat) (3.8 V at 15 A), enabling efficient base drive with standard logic-level or op-amp sources. The device's RBSOA is validated at T_C = 100°C for inductive turn-off with reverse-biased base-emitter junctions, supporting reliable operation in clamped inductive loads.

Key Specifications

Pinout & Package

Package: TO-247 (Case 340L, Style 3) or TO-218 (SOT-93, Case 340D, Style 1); both are 3-pin isolated-tab power packages with identical pin assignment and thermal interface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BDW83C and MJ15003, the MJH11020 uniquely balances 200 V capability, 15 A current, Darlington gain, and TO-247 thermal performance - making it optimal for 100–200 V industrial motor drives where base drive efficiency and thermal margin are critical.

Availability

MJH11020 is available at Aetrix Electronics and suitable for DC motor drives, linear audio amplifiers, relay/solenoid drivers, and industrial linear power supply pass elements requiring stable component supply across extended production lifecycles.

Supply support for MJH11020 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 MJH11020 belongs to onsemi's complementary Darlington power transistor family, engineered for high-reliability linear amplification and low-frequency switching in harsh industrial environments.

FAQ

What is the maximum safe collector-emitter voltage for MJH11020 in switching applications?

The MJH11020 has a minimum collector-emitter sustaining voltage V_CEO(sus) of 200 Vdc, verified under pulse test conditions (300 µs, 2% duty cycle). This rating applies to non-avalanche switching with base drive present; operation above 200 V requires external clamping or snubbing to prevent second breakdown. The device is not rated for avalanche energy absorption.

Does MJH11020 require a heatsink, and what thermal resistance is needed for 15 A continuous operation?

Yes, the MJH11020 requires a heatsink for continuous 15 A operation. With P_D = 150 W at T_C = 25°C and R_JC = 0.83°C/W, the junction-to-ambient thermal path must limit total rise to ≤125°C. Assuming 25°C ambient, a heatsink with ≤0.62°C/W total thermal resistance (including mounting interface) is required - typically achieved with forced-air-cooled aluminum extrusions or large passive finned sinks.

Can MJH11020 be used in parallel configurations to increase current capacity?

No, the MJH11020 is not recommended for direct paralleling due to positive thermal coefficient of V_BE in Darlington structures, which causes current hogging and thermal runaway. If higher current is needed, use separate gate/base-driven channels or select higher-rated alternatives like MJ15024 (25 A, 250 V) instead of paralleling MJH11020 units.

What is the base drive requirement for MJH11020 to achieve full 15 A collector current?

To achieve 15 A collector current, the MJH11020 requires a minimum base current of 150 mA, based on h_FE ≥100 at I_C = 15 A (per datasheet). For reliable saturation, design for I_B ≥200 mA to accommodate h_FE degradation at elevated temperature and ensure V_CE(sat) ≤4.0 V. Base drive must be capable of sourcing ≥200 mA at ≥3.8 V (V_BE(sat)).

Is MJH11020 compatible with TO-247 and TO-218 footprints, and are there electrical differences between them?

Yes, the MJH11020 is offered in both TO-247 (Case 340L) and TO-218 (SOT-93, Case 340D) packages with identical pinout (Base-Collector-Emitter), thermal specs (R_JC = 0.83°C/W), and electrical ratings. The TO-247 variant replaced TO-218 as the standard offering effective June 2012 per FPCN# 16827; both are mechanically and electrically interchangeable in PCB layout and thermal design.