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Black open-frame server rack, 42U tall, 19-inch wide, no sides or doors

Tripp Lite

Tripp Lite SR42UBEXPNDNR3 42U 19" Server Rack Expansion Frame

SKU CH-4KK3-A0M1Z MPN SR42UBEXPNDNR3

A 42U open frame rack expansion unit that holds 3000 lb of 19-inch equipment with adjustable square-hole rails, pre-installed casters and levelers, plus numbered U spaces for tool-less 0U PDU mounting

  • Rack height42U
  • Spec summaryForm Factor:19 in 42U
  • Product dimensionsHeight:78.5 in × Width:23.6 in × Depth:41.5 in
  • Product weight150 lb (68 kg)
  • Product typeRack Frame
  • Key featuresPackage Contents: 42U 4-Post SmartRack Premium Open Frame Ra
  • Holds 3000 lb of 19-inch rack gear in 42U
  • Square mounting holes adjust from 4 to 37 inches in quarter-inch steps
  • Easy-view depth index speeds rail alignment without measuring tools
  • Preinstalled 3-inch casters and levelers simplify positioning and securing
  • Numbered rack spaces support tool-less 0U PDU and cable manager mounting

Expansion Frame For 19-Inch Racks

The SR42UBEXPNDNR3 is a 42U open frame rack designed to expand existing 19-inch server installations. It supports up to 3000 lb of standard rack equipment without sides, doors or roof panels. The unit ships with fifty M6 cage nuts, fifty M6 screws and stabilizing brackets for immediate assembly.

Adjustable Rails With Depth Index

Front and rear vertical rails feature square mounting holes adjustable in quarter-inch increments from 4 to 37 inches deep. An easy-view depth index allows consistent rail placement without repeated measurements. Each rack space is numbered for quick reference and supports tool-less button-mount installation of up to four compatible PDUs or cable managers.

Grounded Frame With Casters And Levelers

All components are electrically bonded to the enclosure frame with front and rear threaded grounding points for facility earth connection. Preinstalled three-inch casters allow minor position adjustments on site while preinstalled levelers secure the frame in its final location. The unit measures 78.5 inches high, 23.6 inches wide and 41.5 inches deep at 150.00 lb.

How it compares

Measured against everything we stock in Rack Cabinets & Shelves, at today’s prices. Recalculated every night.

Price $1,188.99
Pricier than about 90% of the 2,764 comparable items (median $106.99).

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Specifications

Product
Brand nameTripp Lite
Model nameSR42UBEXPNDNR3
Product typeRack Frame
Size & build
Rack height42U
Product dimensionsHeight:78.5 in × Width:23.6 in × Depth:41.5 in
Product weight150 lb (68 kg)
Shipping weight91.17 kg
Package size2032 × 1067 × 610 mm

Questions about this item

Does the SR42UBEXPNDNR3 generate any noise or heat during continuous operation?

The SR42UBEXPNDNR3 is a passive metal frame with no fans or power supply, so it produces no noise or heat itself; only the installed equipment contributes to thermal load.

What mounting hardware must I already have to install 19-inch equipment in this rack?

The package includes 50 M6 cage nuts and 50 M6 screws; if your devices use a different thread or you need more than 50 mounting points, you must supply the additional hardware.

Will my existing 19-inch gear with fixed-depth rails fit the adjustable rails on this frame?

The front and rear rails adjust in quarter-inch increments from 4 to 37 inches deep, so any standard 19-inch equipment with a mounting depth inside that range will align without modification.

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