UM6K33NTN vs DMN3200U-7: Component Comparison for Power Electronics Design
Quick verdict
For low-current switching or level-shifting applications requiring dual MOSFETs in a compact package, the UM6K33NTN is preferable due to its dual-channel configuration and logic-level gate drive at 1.2 V. For higher current loads up to 2.2 A and lower R_DS(on), the DMN3200U-7 offers significant efficiency and thermal advantages, making it better suited for switching or load-driving roles in 30 V systems where single devices are acceptable.
Spec comparison table
| Spec | UM6K33NTN | DMN3200U-7 | Notes |
|---|---|---|---|
| Configuration | 2 N-Channel (Dual) | 1 N-Channel | UM6K33NTN provides dual MOSFETs, useful for half-bridge or dual-switch applications. |
| Continuous Drain Current @ 25°C (I_D) | 0.2 A | 2.2 A | DMN3200U-7 supports 11× higher current, critical for load-driving and power stages. |
| Drain-Source Voltage (V_DS max) | 50 V | 30 V | UM6K33NTN supports higher voltage, better for 48 V-class or margin in 30 V systems. |
| Gate Drive Voltage | Logic Level, 1.2 V drive | 1.5 V, 4.5 V drive | UM6K33NTN is optimized for logic-level drive, DMN3200U-7 requires slightly higher gate voltage for R_DS(on) spec. |
| Input Capacitance (C_iss) @ 10 V | 25 pF | 290 pF | UM6K33NTN’s lower input capacitance reduces gate charge, improving switching speed and gate driver load. |
| Package | 6-TSSOP (UMT6), SC-88, SOT-363 | SOT-23-3 | Different packages; UM6K33NTN is larger and dual-channel, DMN3200U-7 is smaller single channel. |
| Operating Temperature (TJ) | Up to 150 °C | -55 °C to 150 °C | Both rated to 150 °C max junction temperature, DMN3200U-7 specifies wider ambient range. |
| Power Dissipation Max (P_D) | 120 mW | 650 mW | DMN3200U-7 can dissipate over 5× more power, better for high-power switching. |
| R_DS(on) Max @ I_D, V_GS | 2.2 Ω @ 200 mA, 4.5 V | 90 mΩ @ 2.2 A, 4.5 V | DMN3200U-7 has dramatically lower R_DS(on), reducing conduction losses significantly. |
| Threshold Voltage (V_GS(th)) | 1 V @ 1 mA | 1 V @ 250 µA | Both have similar threshold voltage, but UM6K33NTN is specified at higher current, indicating a firmer turn-on threshold. |
| Technology | MOSFET (Metal Oxide) | MOSFET (Metal Oxide) | Both use similar MOSFET technology. |
| Supplier Device Package | UMT6 | SOT-23-3 | Different footprints; not interchangeable without layout changes. |
Design trade-offs
The UM6K33NTN’s dual N-channel MOSFET configuration in a single 6-TSSOP UMT6 package makes it ideal for compact dual-switch applications such as level shifters, low-side switches, or complementary drive in low-current logic domains. Its logic-level gate drive at 1.2 V allows direct interfacing with low-voltage controllers without additional gate drive amplification. However, the device’s high R_DS(on) of 2.2 Ω at 200 mA limits its use to low-current or signal-level switching, and its maximum power dissipation of 120 mW demands careful thermal management even at modest load currents.
In contrast, the DMN3200U-7 supports continuous drain currents exceeding 2 A and dissipates up to 650 mW, enabling its use in load switching, power management, and small motor drive stages. Its R_DS(on) of 90 mΩ at 2.2 A and 4.5 V gate drive is significantly lower, reducing conduction losses and improving efficiency. However, the DMN3200U-7 has a higher input capacitance (290 pF versus 25 pF), increasing gate charge and potentially requiring stronger gate drivers or slower switching speeds to manage EMI and switching losses. The device has a 30 V rating, which is adequate for many low-voltage systems but less margin than the UM6K33NTN’s 50 V rating.
From a thermal perspective, the DMN3200U-7’s higher power dissipation rating and lower R_DS(on) mean it can handle higher power without excessive heating, but its smaller SOT-23-3 package limits heat sinking capability compared to the UM6K33NTN’s larger package. This must be balanced against board space constraints and thermal design.
Gate drive requirements differ: UM6K33NTN’s logic-level gate threshold and drive voltage enable direct drive from 1.8–3.3 V logic without level shifting, whereas DMN3200U-7 ideally requires 4.5 V for minimum R_DS(on), though it can operate at 1.5 V with higher losses. This affects the choice of gate driver and power supply rails. The significantly higher input capacitance of DMN3200U-7 can increase switching losses and EMI if driven at high frequency without proper gate drive impedance design.
Cost-wise, the UM6K33NTN’s dual MOSFET array can reduce component count and BOM cost for dual-switch applications, while the DMN3200U-7 may be cheaper per unit but requires two devices for similar dual channel functionality. Volume pricing will depend on vendor and market but expect the DMN3200U-7 to be more cost-effective for single-switch high-current applications.
Use-case fit
Choose UM6K33NTN when…
- You need a compact dual N-channel MOSFET in a single package for low-current switching or signal-level multiplexing (<200 mA).
- Your design operates at up to 50 V and requires logic-level drive compatibility (1.2 V), such as level-shifting or power gating in low-voltage logic domains.
- Board space is constrained but dual switches are needed, avoiding discrete dual MOSFET BOM complexity.
- Thermal dissipation is low and switching frequency is moderate to low, minimizing switching losses due to low input capacitance.
- Your application tolerates relatively high R_DS(on) and low power dissipation (120 mW), such as bias switching or load detection circuits.
Choose DMN3200U-7 when…
- You require a single N-channel MOSFET capable of switching up to 2.2 A continuous current with low conduction losses (90 mΩ).
- Your system voltage is 30 V or below and can provide a 4.5 V gate drive rail for optimal R_DS(on).
- Thermal design requires handling up to 650 mW dissipation in a compact SOT-23-3 footprint.
- Switching speed and efficiency are priorities, and you can accommodate higher gate charge (290 pF) with appropriate gate driver design.
- You need cost-effective, readily available single MOSFETs for load switching, small motor drive, or power management at moderate voltages and currents.
Drop-in compatibility
The UM6K33NTN and DMN3200U-7 are not pin-compatible and use different packages (UM6K33NTN in UMT6 6-TSSOP vs. DMN3200U-7 in SOT-23-3). The UM6K33NTN contains two MOSFETs in one package, while the DMN3200U-7 is a single MOSFET. Substituting one for the other requires redesigning the PCB footprint and possibly circuit topology to account for single vs. dual devices, different pinouts, and different thermal characteristics. Gate drive and voltage ratings differ, so the replacement may affect gate drive circuitry and voltage margins.
Alternatives to consider
- BSS138 (ON Semiconductor): Popular logic-level N-channel MOSFET with low gate threshold, suitable for low-current switching up to ~200 mA.
- Si2302 (Vishay): Single N-channel MOSFET with low R_DS(on) and 20 V rating, good for low-voltage load switching at moderate current.
- AO3400A (Alpha & Omega Semiconductor): 30 V, 5.8 A N-channel MOSFET with low R_DS(on) in SOT-23, suitable for higher current applications requiring low conduction loss.