Rittal

German enclosure maker with an in-rack CDU (150–200 kW, fits OCP ORV3 racks) and an in-row CDU rated 1,000–1,500 kW.

CDU HQ Herborn, Germany Owned by Friedhelm Loh Group Checked 9 Nov 2026

Smallest CDU: 150 kW Rittal CDU SK 3343.230 datasheet, 9 Nov 2026
Largest CDU: 1,500 kW Rittal CDU SK 3343.200 datasheet (1,500 kW @ 6 K), 9 Nov 2026

Rating conditions

SK 3343.230: 150 kW @ 6 K ATD / 200 kW @ 8 K ATD. SK 3343.200: 1,000 kW @ 4 K ATD / 1,500 kW @ 6 K ATD.

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Datasheet

Source on every value

Technologies Liquid cooling product types the vendor sells today. 'Liquid-to-air CDU' is a sidecar unit or heat dissipation unit that needs no facility water. 'Two-phase cold plate' boils a refrigerant or dielectric on the chip.: CDU 1
Smallest CDU kW Rated cooling capacity of the smallest shipping CDU in the line, as the vendor publishes it. Rating conditions (approach temperature, fluid) are in the spec notes. Blank when not published.: 150 3
Largest CDU kW Rated cooling capacity of the largest shipping CDU, as the vendor publishes it. Prototypes and announced-only units are left out and named in the spec notes. Blank when not published.: 1,500 2
GPU platforms (vendor-stated) GPU or rack platforms the vendor itself names as supported, certified or targeted, such as NVIDIA GB200 NVL72 or Vera Rubin. Vendor statements only, each with a source. Blank when the vendor names none.: Not published
Level Where the products sit: in the server, in the rack, in the row, or at facility scale (skid or facility distribution unit).: In-rack, In-row 1
Coolant Coolant on the IT side: water-glycol (PG25 and similar), single-phase dielectric (oils, GTL, synthetic hydrocarbons) or two-phase dielectric or refrigerant.: Water-glycol 1
Max per rack kW Highest rack density the vendor publishes for its own system (immersion tank, in-rack CDU, rear door or OEM rack). Filled only when the vendor states a per-rack figure.: Not published
Rear door max kW Highest published heat removal of the vendor's rear-door heat exchanger, per rack.: Not published
Vendor type Liquid cooling specialist, thermal and HVAC major, power and data center infrastructure major, server OEM, component maker (cold plates, connectors, CDUs sold to OEMs) or fluid supplier.: Power and infrastructure major 1
Parent company Owner or controlling shareholder when the vendor sits inside a larger group, such as CoolIT under Ecolab or Motivair under Schneider Electric.: Friedhelm Loh Group 1
HQ region Region of the vendor's (or brand owner's) headquarters.: Europe 1
HQ country Country of the vendor's (or brand owner's) headquarters.: Germany 1
Headquarters Headquarters city and country as the vendor states it.: Herborn, Germany 1
Manufacturing Regions or sites where the vendor says it builds liquid cooling products. Blank when not published.: Not published
Key products Main product lines and model names for data center liquid cooling.: CDU SK 3343.230 (in-rack), CDU SK 3343.200 (in-row) 1
Spec notes Rating conditions behind the numbers (approach temperature, water temperature, fluid), conflicting figures, and prototypes left out of the ranges.: SK 3343.230: 150 kW @ 6 K ATD / 200 kW @ 8 K ATD. SK 3343.200: 1,000 kW @ 4 K ATD / 1,500 kW @ 6 K ATD. 1

Sources

Rittal CDU SK 3343.200 datasheet accessed 2026-11-09
Rittal CDU SK 3343.200 datasheet (1,500 kW @ 6 K) accessed 2026-11-09
Rittal CDU SK 3343.230 datasheet accessed 2026-11-09

Rittal alternatives

Largest CDU

Chilldyne 1,500 kW1
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Johnson Controls (Silent-Aire) 1,050 kW1

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