onsemi MJE18006G

Overview

MJE18006G from onsemi is an NPN bipolar power transistor engineered for high-voltage switching in 220 V line-operated switch-mode power supplies and electronic light ballasts. It delivers 6.0 A continuous collector current, sustains 450 V collector-emitter voltage (V_CEO), and features low dynamic saturation voltage (V_CE(sat) ≤ 0.65 V at I_C = 3.0 A, T_C = 125°C) to minimize conduction losses in high-frequency SMPS topologies.

For engineers reviewing the MJE18006G datasheet, pinout, applications, or equivalent options, key selection criteria include its 1000 V V_CES breakdown rating, fast turn-off time (t_off ≤ 2.5 µs at T_C = 125°C), absence of current tail requiring no base coil for turn-off, and TO-220AB package with R_JC = 1.25 °C/W for thermal reliability in compact power stages.

Technical Context

The MJE18006G employs a state-of-the-art die optimized for hard-switched inductive loads in offline SMPS and electronic ballasts. Its design emphasizes high DC current gain (h_FE = 6–34 across I_C = 0.5–3.0 A, T_C = 25–125°C) and flat gain profile to reduce base drive complexity, while tight parametric distributions ensure consistent lot-to-lot performance critical for production power conversion.

It operates within a −65°C to +150°C junction temperature range and supports clamped inductive switching up to V_clamp = 300 V with validated safe operating area (SOA) curves for both forward-bias (Figure 15) and reverse-bias (Figure 16) conditions. Thermal resistance R_JA = 62.5 °C/W enables operation at full 100 W dissipation only with adequate heatsinking at T_C = 25°C.

Key Specifications

Pinout & Package

Package: TO-220AB (Case 221A-09, Style 1), Pb-free, RoHS compliant. Mounting tab is Collector (C); electrically isolated mounting surface required.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BUW12A and MJE13009G, the MJE18006G uniquely balances 450 V V_CEO, 6 A current, sub-µs switching, and 1.25 °C/W thermal resistance-making it the only option qualified for compact, high-efficiency 220 V SMPS and electronic ballasts demanding simultaneous high voltage, speed, and thermal performance.

Availability

MJE18006G is available at Aetrix Electronics and suitable for switch-mode power supplies, electronic light ballasts, and AC-DC adapters requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for MJE18006G 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 MJE18006G belongs to onsemi's high-voltage bipolar power transistor product line, designed specifically for reliable, high-efficiency switching in 220 V line-operated power conversion systems including lighting and industrial power supplies.

FAQ

What is the maximum collector-emitter sustaining voltage (V_CEO(sus)) for the MJE18006G?

The MJE18006G has a guaranteed minimum collector-emitter sustaining voltage of 450 Vdc at I_C = 100 mA and L = 25 mH, as specified in the OFF CHARACTERISTICS table. This rating ensures reliable operation in 220 V AC line applications with typical surge margins, and is distinct from the higher 1000 V V_CES breakdown rating which applies under open-base conditions.

Does the MJE18006G require a base turn-off coil or snubber network?

No, the MJE18006G does not require a base turn-off coil due to its "no current tail" design feature. The datasheet explicitly states this improvement enables elimination of the coil in the base circuit for turn-off. This simplifies driver design and improves reliability in high-volume SMPS and ballast applications where the MJE18006G is deployed.

What is the thermal resistance from junction to case (R_JC) for the MJE18006G?

The MJE18006G has a maximum thermal resistance of 1.25 °C/W from junction to case, measured under standard TO-220 mounting conditions. This value is critical for calculating allowable power dissipation at elevated case temperatures and is verified per JEDEC JESD51-14 standards. It directly supports the device's 100 W total dissipation rating at T_C = 25°C.

Can the MJE18006G be used in inductive switching applications with clamped voltage?

Yes, the MJE18006G is explicitly characterized for clamped inductive switching with V_clamp = 300 V and L = 200 µH, as shown in Figures 9–14 and Table 1. Its reverse-bias safe operating area (RBSOA) is validated under these conditions, ensuring reliable turn-off without avalanche stress-a key requirement for electronic ballast and PFC stage designs using the MJE18006G.

Is the MJE18006G RoHS compliant and what does the 'G' suffix indicate?

Yes, the MJE18006G is RoHS compliant and the 'G' suffix explicitly denotes the Pb-free package, as confirmed in the Marking Diagram and Ordering Information sections. The device meets EU Directive 2011/65/EU and is qualified for lead-free soldering processes with a maximum lead temperature of 260°C for 5 seconds, making it suitable for modern environmentally regulated production lines.