42U NEMA 12 Enclosure w/ Integrated Cooling & Backup Cooling, 1.6kW

The Liebert MCR MCR-42U-RB is a self-contained rack enclosure system that includes a load-sized, computer-grade air conditioner located at the bottom of the enclosure, supplying cool air to sensitive equipment on all levels. A back-up cooling system ensures environmental security.

  • Sealed, NEMA Type 12 Enclosure - protect against dust, dirt, and dripping non-corrosive liquids, oil and lubricants.
  • Provides integrated rack-mounted Environmental Cooling Module (ECM), and a Back-Up Cooling Module (BCM).
  • Secure Door: lockable door provides an extra measure of security.
  • External Dim.: 77"H x 23.5"W x 38"D
  • Internal Rack Dim.: 42U / 73.5" x 19"W x 26.5" to 30.5"D (adjustable depth)
  • ECM Supported Cooling Load: 1647 Watt / 5621 BTUH
  • BCM Supported Cooling Load: 824 Watt / 2811 BTUH
  • Max Ambient Temp: 105°F / 41°C
  • Sound Level (1.5m): 52 Lpa (ECM), 59 Lpa (BCM)
  • Input Power: 120V @ 60Hz
  • Standards: IEC IP52 enclosure (HD/RD systems), NRTL: ETL and CSA approved, ISTA Procedure 1B
  • Warranty: None - 2 Years with optional StartUp Service (contact us)

Includes: Front Plexi Door, Rear Door BCM Assembly and insulated side panels, Rail FRT/RR SQR 42U (78"), EMC2000LR-T60 & BCM2000L-60, Caster Kit, High Temp Alarm, Adapter ECM 19" x 38" Duct, Color RAL 7021.

Please Note: Self-contained racks cannot be returned. Please make sure to size your airflow requirements, and power requirements correctly before ordering. Standard manufacturer warranty still applies. For other rack sizes, 3.6 kW capacity, or other configurations, please contact us.

Standard lead time is 2-4 weeks.

Liebert MCR-42U-RB - Click to enlarge

Please call 1-866-722-5776 to order
Free Project Evaluation

Top Mounted Environmental Cooling Module

Internal ECM
The integrated ECM enclosure design promotes the best air circulation to prevent hot spots within the enclosure. Inside and outside air are isolated for maximum cleanliness.

Back-Up Cooling Module

Back-Up Cooling
During high internal temperature or power outage conditions, the BCM (Back-Up Cooling Module) — powered by the enclosure’s UPS — is automatically activated, drawing in filtered outside air to ensure continuous air flow to protected equipment.

In-Row Environmental Cooling Module

Air Distribution
Exclusive ECM conditioned air distribution duct ensures uniform air flow for multiple enclosures.


  • Designed as a plug-and-play system ready to install.
  • Wheel-mounted cabinet for easy relocation.
  • Adjustable racks and rack rails support a wide variety of equipment.
  • Optional top mounted air conditioning allows maximum use of internal rack space or can be used to double cooling capacity with the internal air conditioning unit.

Higher Availability:

  • Cools IT equipment to eliminate downtime from overheating.
  • Lockable door protects against unauthorized access.
  • Specially designed door gasket and sealed cable entrance ensure stable cooling environment.
  • Optional back-up cooling assures continued cooling in the event of a power loss.
  • Improved cable access and management improves airflow to reduce overheating of protected IT equipment.

Lowest Total Cost Of Ownership:

  • Competitively priced as an integrated system, compared to purchasing separate components.
  • Simplified plug-and-play installation reduces overall implementation time, reducing costs.
  • Optional energy saver control saves money by allowing back-up cooling to operate as primary enclosure cooler.
  • Integrated air conditioning reduces potential downtime costs by assuring proper system operation.

Ideally Suited For:

  • Network closets
  • Server closets or small rooms

Power can be supplied and protected through an optional Liebert GXT on-line UPS or Liebert PSI line-interactive UPS. Power distribution is supplied via optional Liebert MPH2 PDUs.

Liebert MCR-42U-RB Specifications:

Download IconMCR Specifications Guide (TXT)

External Rack Dim. (including BCM):77"H (1956 mm) x 23.5"W (597 mm) x 38"D (965 mm)
Internal Rack Dim.:42U / 73.5" (1867 mm) x 19"W (483 mm) x 26.5" to 30.5"D adjustable depth (673 mm to 775 mm)
Environmental Cooling Module Dim.7U / 12.25"H (311 mm) x 17.43"W (443 mm) x 29"D (737 mm)
Back-Up Cooling Module Dim.35"H (889 mm) x 15.5"W (393.7 mm) x 3.75"D (95.2 mm)
ECM Cooling
Supported Cooling Load:1647 Watt / 5621 BTUH
Rated Cooling Capacity:2021 Watt / 6897 BTUH
Total Heat Rej.:3204 Watt / 10935 BTUH
ECM Max Ambient Temp:105°F / 41°C
ECM Sound Level:52 Lpa (1.5m)
Power120V @ 60Hz, 9.8 A (full load), 15A overload protection
- Wire Sizing Amps: 11.7A
Backup (BCM) Cooling
Supported Cooling Load:824 Watt / 2811 BTUH
Rated Cooling Capacity:NA
Total Heat Rej.:3204 Watt / 10935 BTUH
ECM Max Ambient Temp:105°F / 41°C
ECM Sound Level:59 Lpa (1.5m)
Power120V @ 60Hz, 2 A (full load), 15A overload protection
- Wire Sizing Amps: 2.5A
Standards-19" EIA-310 Standard rack mount
-NEMA Type 12 / IEC IP52 enclosure (HD/RD systems)
-NRTL: ETL and CSA approved (120VAC or 208VAC/60Hz systems)
-CE Compliance mark (230VAC/50Hz systems)
-ISTA Procedure 1B
With optional StartUp Service (contact us): The Liebert MCR units are warranted against defects in materials and workmanship for two (2) years parts, from date of shipment.

22U NEMA 12 Enclosure w/ Rack-top Cooling, 1.6kW
22U NEMA 12 Enclosure w/ Rack-top Cooling, 1.6kW
Liebert MCR 22U x 23.5"W x 38"D Self-Contained NEMA 12 Enclosure with 1.6 kW (5621 BTU) rack-topmount Cooling Unit. Includes Casters and locking doors.
Liebert GXT4 On-Line Dual Conversion UPS series
Liebert GXT4 On-Line Dual Conversion UPS series
On-Line, Dual Conversion UPS, 500VA to 10kVA, Rackmount & Tower Kits included
Liebert PSI Line-Interactive UPS
Liebert PSI Line-Interactive UPS
Line-Interactive UPS, 1000VA-3000VA, rackmount or tower configuration
Liebert MPH2 Managed Rack PDUs
Liebert MPH2 Managed Rack PDUs
Managed Rack PDU, comprehensive monitoring and control capabilities up to the outlet level, built in environmental monitoring.
Automatic Transfer Switches (ATS) - Fail-Safe Power Redundancy
Automatic Transfer Switches (ATS) - Fail-Safe Power Redundancy
Automatically switch power inputs if either in-feed goes down - Fail-Safe N+1 Power Redundancy.
zLock Dual-side Locking Power Cables
zLock Dual-side Locking Power Cables
Eliminate accidental and vibration power cable disconnects - zLock is the only universal locking power cord that locks both ends.
Server Rack Cable Management
Server Rack Cable Management
Cable Management Rings, Rackmount Cable Organizers, Cable Ties, Patch Panels, Cat5 Patch Cables, Fiber Optic Cables, Power Cords
Server Rack Shelf - 2 & 4 Post Rackmount Shelves
Server Rack Shelf - 2 & 4 Post Rackmount Shelves
Various 2-Post and 4-Post Rack Shelves
Rackmount LCD Console Drawers<br>
Console Drawers with KVM Switch
Rackmount LCD Console Drawers
Console Drawers with KVM Switch

Blanking Panels / Filler Panels / Rack Enclosure Spacers
Blanking Panels / Filler Panels / Rack Enclosure Spacers
Blanking Panels are used for proper airflow management within a rack - Reduce hotspots and bypass airflow.
Server Rack / Row Airflow Management & Cooling
Server Rack / Row Airflow Management & Cooling
Rackmount Fan Assembly, Enclosure Blowers, InRow Cooling, Rack Mount Fans, Raised Floor Grommets
Cat5e Patch Panels - Cat6 Patch Panels
Cat5e Patch Panels - Cat6 Patch Panels
Patch panels are panels of network ports which connect incoming and outgoing lines of a LAN or other communication, electronic or electrical system.
Server Rack & Room Monitoring
Server Rack & Room Monitoring
Remote Monitor various types of camera and sensor devices, such as temperature, humidity, water, smoke, motion and door sensors.
Server Rack Cable Ladders
Server Rack Cable Ladders
See full selection of overhead Cable Runways - Ladders & Ladder Accessories, Bends & Radii, Junctions & Splicing, Supports & Mounting brackets.
Upsite AisleLok Modular Containment
Upsite AisleLok Modular Containment