JetCool (Flex)

Microconvective cold plate maker: SmartPlate jets coolant straight at chip hot spots. It also sells the SmartSense in-rack CDU (up to 300 kW) and a modular row CDU reaching 1.8 MW. Flex acquired JetCool in November 2024.

CDU, Cold plate, Manifolds, Connectors HQ Littleton, Massachusetts, USA Owned by Flex Checked 9 Nov 2026

Smallest CDU: 300 kW JetCool SmartSense CDU, 9 Nov 2026
Largest CDU: 1,800 kW JetCool SmartSense CDU, 9 Nov 2026
Max per rack: 300 kW JetCool SmartSense CDU, 9 Nov 2026

Rating conditions

SmartSense CDU: liquid-to-liquid, up to 300 kW per rack, 1–1.5 LPM/kW. Modular CDU: 2–6 units, 600 kW–1.8 MW, up to 1,200 LPM @ 35 psid. Flex plans to spin off its Cloud and Power Infrastructure segment, which JetCool's site says is becoming Axiom, in the first calendar quarter of 2027.

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Ownership change

Nov 2024

Acquired by Flex. Flex, the electronics manufacturer, acquired JetCool in November 2024. JetCool makes SmartPlate microconvective cold plates and SmartSense CDUs. Source

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, Cold plate, Manifolds, Connectors 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.: 300 1
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.: 1,800 1
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).: Server, 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.: 300 1
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.: Specialist 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.: Flex 3
HQ region Region of the vendor's (or brand owner's) headquarters.: North America 1
HQ country Country of the vendor's (or brand owner's) headquarters.: United States 1
Headquarters Headquarters city and country as the vendor states it.: Littleton, Massachusetts, USA 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.: SmartPlate cold plates, SmartPlate System (liquid-assisted air), SmartSense CDU, modular row CDU, manifolds and quick disconnects 1
Spec notes Rating conditions behind the numbers (approach temperature, water temperature, fluid), conflicting figures, and prototypes left out of the ranges.: SmartSense CDU: liquid-to-liquid, up to 300 kW per rack, 1–1.5 LPM/kW. Modular CDU: 2–6 units, 600 kW–1.8 MW, up to 1,200 LPM @ 35 psid. Flex plans to spin off its Cloud and Power Infrastructure segment, which JetCool's site says is becoming Axiom, in the first calendar quarter of 2027. 1

Sources

JetCool SmartSense CDU accessed 2026-11-09
JetCool SmartPlate cold plate accessed 2026-11-09
DCD: Flex acquires JetCool accessed 2026-11-09
Flex 8-K exhibit 99.1, 14 Oct 2026 (Axiom spin-off planned for Q1 2027) accessed 2026-11-09

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