Alpha & Omega Semiconductor Inc. AOD3C60

Overview

AOD3C60 from Alpha & Omega Semiconductor is a 600 V, 3 A N-channel enhancement-mode MOSFET in TO-252 (DPAK) package, featuring 1.4 Ω max R_DS(on) at V_GS = 10 V, 10.3 nC typical gate charge, and 100% UIS-tested ruggedness for offline AC-DC power supplies.

For engineers reviewing the AOD3C60 datasheet, pinout, applications, or equivalent options, key selection criteria include avalanche energy rating (218 mJ), diode recovery robustness (238 ns t_rr, 2.5 µC Q_rr), thermal resistance (R_θJC = 1.4 °C/W), and guaranteed 700 V breakdown margin at high temperature.

Technical Context

The AOD3C60 employs a high-voltage trench-gate process optimized for fast switching and high dv/dt immunity (20 V/ns), with low Crss (1.5 pF) and Ciss (648 pF) enabling efficient hard-switched flyback and LLC resonant converters.

Its body diode supports continuous 3 A forward current (I_S) and pulsed 19 A (I_SM), with V_SD = 0.76–1.0 V and t_rr/Q_rr characterized under 100 A/µs dI/dt, making it suitable for synchronous rectification and active clamp topologies where diode recovery behavior directly impacts EMI and efficiency.

Key Specifications

Pinout & Package

Package: TO-252 (DPAK), surface-mount, exposed drain pad for thermal and electrical connection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage MOSFET applications.

Compared with STP3NK60ZFP and IXTP3N60P, the AOD3C60 delivers lower R_DS(on), tighter gate charge distribution, and verified avalanche robustness-critical for high-density, high-reliability offline converters where thermal margin and surge immunity are design constraints.

Availability

AOD3C60 is available at Aetrix Electronics and suitable for offline AC-DC adapters, LED driver primary switches, and industrial power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for AOD3C60 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

Alpha & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in high-efficiency MOSFETs, IGBTs, and power ICs for power conversion and motor control.

The AOD3C60 belongs to AOS's high-voltage "AlphaMOS" family, engineered specifically for rugged, high-density offline power supplies where avalanche capability, low gate charge, and thermal performance are prioritized over ultra-low R_DS(on).

FAQ

What is the maximum junction temperature rating for the AOD3C60?

The AOD3C60 has a maximum junction temperature (T_J) rating of 150°C, validated across all absolute maximum ratings and thermal characterization curves. This rating is used to define its power derating curve (Figure 11), safe operating area (Figure 10), and avalanche testing conditions. Operation beyond 150°C risks permanent parametric shift or catastrophic failure. The AOD3C60 must be thermally designed to maintain T_J ≤ 150°C under worst-case ambient and load conditions.

Does the AOD3C60 support gate drive voltages below 10 V?

Yes-the AOD3C60 has a gate threshold voltage (V_GS(th)) of 3–5 V, so it begins conducting at V_GS ≥ 4 V and reaches near-full enhancement by 7–8 V. However, R_DS(on) increases significantly below 10 V (e.g., ~2.5 Ω at V_GS = 7 V), raising conduction losses. For optimal efficiency and thermal performance, the AOD3C60 should be driven with a stable 10 V gate-source voltage, as specified in its key electrical characteristics table.

Is the AOD3C60 suitable for use in synchronous rectification circuits?

No-the AOD3C60 is not recommended for synchronous rectification. Its body diode exhibits 238 ns reverse recovery time and 2.5 µC Q_rr, which cause significant switching loss and voltage overshoot when used as a freewheeling device in secondary-side positions. Synchronous rectifiers require ultra-fast, low-Q_rr MOSFETs (e.g., AON6254 or SiC Schottky replacements). The AOD3C60 is intended exclusively for primary-side high-voltage switching roles.

What does "100% UIS tested" mean for the AOD3C60?

"100% UIS tested" means every AOD3C60 unit undergoes unclamped inductive switching stress at 218 mJ (L = 60 mH, I_AS = 2.7 A, V_DD = 150 V) during final test. This verifies each device can safely absorb inductive energy without degradation-critical for handling transformer leakage spikes and startup surges in flyback and forward converters. It is not a sampling test; it is performed on 100% of shipped units.

Can the AOD3C60 be mounted directly to a heatsink?

Yes-the AOD3C60's TO-252 package features an exposed drain pad that is electrically and thermally connected to the drain terminal. When mounted with thermally conductive adhesive or screw-down hardware to an isolated heatsink, it achieves R_θJC = 1.4 °C/W. Electrical isolation between drain and heatsink must be ensured using insulating pads or coatings, as the pad carries full 600 V potential. PCB copper pour heatsinking remains the most common implementation for the AOD3C60.