UM6K33NTN vs AON7407 MOSFET Comparison
Quick verdict
For low-current, dual-channel switching applications requiring logic-level drive and very low power dissipation, the UM6K33NTN is the clear choice due to its integrated dual N-channel devices, low gate threshold, and tiny input capacitance. Conversely, for high-current, single-channel P-channel loads where low R_DS(on) at moderate gate drive is critical, the AON7407 excels with its 14.5A continuous current rating and sub-10mΩ R_DS(on) at 4.5V, albeit at the cost of significantly higher gate charge and input capacitance.
Spec comparison table
| Spec | UM6K33NTN | AON7407 | Notes |
|---|---|---|---|
| Configuration | Dual N-Channel | Single P-Channel | Dual vs single channel affects application flexibility; polarity difference critical for drive. |
| Drain-Source Voltage Max (V) | 50 V | 20 V | UM6K33NTN supports higher voltage, enabling use in higher voltage rails. |
| Continuous Drain Current @ 25°C (A) | 0.2 A | 14.5 A (Ta), 40 A (Tc) | AON7407 supports ~70x higher current, suitable for power stages vs signal-level switching. |
| Maximum Power Dissipation | 120 mW | 3.1 W (Ta), 29 W (Tc) | AON7407 handles much higher power, important for thermal design in power applications. |
| R_DS(on) Max @ ID, V_GS | 2.2 Ω @ 0.2A, 4.5 V | 9.5 mΩ @ 14A, 4.5 V | AON7407’s R_DS(on) is orders of magnitude lower at high current, critical for efficiency. |
| Gate Threshold Voltage (V_GS_th) | 1 V @ 1 mA | 0.9 V @ 250 µA | Both logic-level, but AON7407’s threshold is slightly lower; negligible difference in practice. |
| Gate Charge (Q_g) | Not specified | 53 nC @ 4.5 V | AON7407 has significant gate charge, impacting switching losses and driver requirements. |
| Input Capacitance (C_iss) | 25 pF @ 10 V | 4195 pF @ 10 V | UM6K33NTN’s input capacitance is 2 orders of magnitude smaller, easing gate drive and switching speed. |
| Gate Drive Voltage | Logic Level, 1.2 V Drive | 1.8 V to 4.5 V | UM6K33NTN supports very low drive voltage, suited for low-voltage logic; AON7407 needs at least ~1.8 V. |
| Package | 6-TSSOP (UMT6), SC-88, SOT-363 | 8-PowerVDFN-EP (3x3 mm) | UM6K33NTN’s smaller package suits compact boards; AON7407’s DFN allows better thermal dissipation. |
| Operating Temperature Range (T_J) | Up to 150 °C | -55 °C to 150 °C | Both rated to 150 °C max junction temperature; AON7407 has wider ambient range. |
| Technology | MOSFET (Metal Oxide) | MOSFET (Metal Oxide) | Both use standard MOSFET tech; no difference here. |
Design trade-offs
The UM6K33NTN is a low-voltage, low-current dual N-channel MOSFET array optimized for signal-level switching or load switching in compact, low-power applications. Its extremely low input capacitance (25 pF) and logic-level gate drive (1.2 V) make it ideal for direct drive from microcontrollers or low-voltage logic without needing dedicated gate drivers or level shifters. The relatively high R_DS(on) of 2.2 Ω limits it to low current applications, but it dissipates very little power (120 mW max), reducing thermal management requirements. Its small 6-pin package also allows for dense PCB layouts in space-constrained designs.
In contrast, the AON7407 is designed for high-current P-channel switching with a significantly higher continuous drain current rating (14.5 A at ambient, 40 A at case), and a much lower R_DS(on) of 9.5 mΩ at 4.5 V gate drive. This makes it suitable for power switching applications where conduction losses dominate efficiency. However, the high gate charge of 53 nC and large input capacitance (~4.2 nF) require a robust gate driver capable of sourcing and sinking significant transient current to achieve fast switching, increasing complexity in the gate drive stage and potentially causing higher switching losses at high frequencies.
Thermally, the AON7407’s package and power dissipation ratings (up to 29 W at case temperature) allow it to be used in power stages with appropriate heatsinking or PCB thermal design. The UM6K33NTN’s 120 mW max power dissipation and small package limit it to signal-level or small load switching, with minimal thermal design effort.
From a firmware perspective, the UM6K33NTN’s low gate threshold and minimal gate charge simplify PWM control with low-voltage MCUs, enabling fast switching with low drive current. The AON7407’s higher gate charge and larger gate capacitance mean the MCU or gate driver must be designed to handle the switching transitions without excessive delays or voltage droops.
Cost-wise, the UM6K33NTN’s dual MOSFET array and small package likely reduce BOM cost and PCB area for low-current switching, whereas the AON7407, being a high-current discrete MOSFET in a larger package, will be more expensive but justified by its power handling capabilities.
Use-case fit
Choose UM6K33NTN when…
- You need to switch two low-current loads (<200 mA) independently in a compact board area.
- Operating voltage rails up to 50 V with logic-level gate drive (1.2 V) compatibility is required.
- Minimizing gate drive power and EMI from switching is critical, thanks to very low input capacitance.
- Thermal constraints prevent adding heatsinks or large copper areas.
- Your application involves low-frequency switching or simple ON/OFF loads (e.g., sensor power gating, level translation).
Choose AON7407 when…
- You require high-current P-channel switching up to 14.5 A continuous at 20 V rails.
- Low conduction losses are critical for efficiency in power stages (e.g., battery switches, load switches).
- Your design can accommodate a dedicated gate driver or MCU with strong drive capability to handle 53 nC gate charge.
- You have thermal management (heatsinks, thermal vias) to dissipate up to 29 W at case temperature.
- You need a robust MOSFET with wide ambient temperature range (-55 °C to 150 °C) for automotive or industrial environments.
Drop-in compatibility
There is no indication that the UM6K33NTN and AON7407 are pin-compatible or share footprint compatibility. UM6K33NTN is a dual N-channel MOSFET array in a 6-pin UMT6 (SOT-363) package, whereas the AON7407 is a single P-channel MOSFET in an 8-pin PowerVDFN (3x3 mm) package. The polarity difference (N vs P channel) and package dimensions make substitution without PCB redesign impossible. Gate drive circuitry and layout will also differ significantly due to the different drive voltages and device characteristics.
Alternatives to consider
- BSS138 (N-Channel MOSFET): A popular logic-level MOSFET with low gate charge and low voltage rating, good for similar low-current switching roles as UM6K33NTN but single channel only.
- IRF9540 (P-Channel MOSFET): A commonly used P-channel MOSFET with higher voltage and moderate current rating, can be an alternative to AON7407 for lower power applications.
- Si2301 (N-Channel MOSFET): Low-voltage, logic-level MOSFET with low R_DS(on) and gate charge, suitable for low-voltage low-current switching.