MicroTCA DC/DC Power Module providing 420W or 840W

The NAT-PM-DC840 is a high-density, high-efficiency power module (PM) for MicroTCA applications. Supplying 840W it is the market's most efficient PM to run today's complex communication systems that use latest processor generations with large memory capacity and an increased number of Advanced Mezzanine Cards (AMC). The NAT-PM-DC840 provides electrical support for the maximum expected workload of 12 Advanced Mezzanine Cards (AMCs), 2 Cooling Units (CUs) and 2 MicroTCA Carrier Hub (MCH) modules.


The PM includes a robust Enhanced Module Management Controller (EMMC) that interfaces the power control functionality via an Intelligent Platform Management Bus (IPMB) to the MicroTCA Carrier Hub (MCH).

Redundancy and Load Sharing

The NAT-PM-DC-840 supports redundancy as well as load sharing modes in accordance with the MicroTCA specifications. In case of an input power supply failure the onboard EMMC can be provided by SMP power from other PMs, so that the MCH is able to analyze root cause failure.

LED Indicators

Besides the standard indicator leds for hot-swap, failure and heartbeat the NAT-PMC-DC840 has a unique light bar indicator, showing the total power load of the module on a scale from 0 to 100% in real time.


The NAT-PM-DC840 is a hot swappable, fully redundant and highly efficient PM. The module's single-width design offers ideal thermal performance and is therefore perfectly suited for all air cooled MicroTCA solutions. The PM's software has been developed and debugged using the MCH from NAT as a reference tool. It is fully compatible with any cards or modules that can be inserted into a MicroTCA chassis.

Application areas are:
  • commercial-, military-, and tele-communications
  • automation test equipment
  • medical
  • video demand
  • security
  • industrial machine control and other clustered computing applications

Family of MicroTCA power modules

The NAT-PM-DC840 is a member of the NAT-PM family of MicroTCA power modules which consists of:


Key features
Technical details
Block diagram
Order code
  • input power protection
  • input isolation
  • inrush control
  • input OR-ing
  • EMI input filtering
  • holdup circuit
  • high efficiency power conversion
  • optical load indicator
  • power management for 16 power channels
  • backup power for other PMs (SMP)
  • support for N+1, 2+2 redundancy and load sharing


Special Features

  • 420W (single brick) or 840W (dual brick) output power
  • support of N+1 and 2+2 redundancy
  • 16 channels of 12 V @ 6.6 A max and 3.3 V @ 180 mA max.
  • support of 12 AMCs, 2 CUs, 2 MCHs with individual control management and payload power
  • dual -48V input
  • 95,5% conversion efficiency (min)
  • supports field upgrades through HPI protocol



  • single-width, full-size (6HP)


Intelligent Security System

  • output over-voltage and overtemperature protection
  • input under-voltage shutdown
  • output short circuit protection
  • IEC/EN/UL60950-1 safety standard compliant
  • programmable current limiting threshold per output channel


3.3 V Power supply subsystem

  • max. channel current: 180mA
  • fast trip current limit: 300mA
  • accuracy 3.3V: 5%


12 V Power supply subsystem

  • max. power / channel: 80W / 6.6A at 12V
  • fast trip current limit: 8.3A
  • max. inrush current: 19.4 A
  • accuracy 12V: 10%


Environmental Conditions

  • standard operating conditions: -5 to 65°C
  • storage temperature: -40 to 85°C
  • extended operating conditions: -40 to 85°C (on demand)
  • min. input voltage: -40V
  • max input voltage: -60V
  • isolation voltage: 1500V
  • RoHS compliant


Front Panel

  • optical load indicator
  • power input A and B
  • hot swap indicator and handle

Standard Compliance

  • PICMG MicroTCA.0 R1.0
  • PICMG AMC.0 R2.0
  • IPMI v1.5 and v2.0

Rev #
Date Last Modified
NAT-PM-DC840_manual Users Manual for MicroTCA DC Power Modules
NAT-PM-DC420 and NAT-PM-DC840
pdf 496 KB 1.7 30-09-2015

NAT-PM-DC840 block diagram

Product Code: NAT-PM - [Option]

-DC840 MicroTCA -48VDC Power Module 840W -
-DC420 MicroTCA -48VDC Power Module 420W -
-DCCAB power cable - 6ft -48VDC single power input cable with other end cut -