Yottadeft Optoelectronics Technology Co., Ltd. (崇浩光電科技) is the master distributor of TMC electronic fluorinated fluids in Asia, based in Taoyuan, Taiwan. This page explains what TMC electronic fluorinated fluids are, which applications they serve, and how to select the right fluid by boiling point and key physical properties.
What Are TMC Electronic Fluorinated Fluids?
TMC electronic fluorinated fluids are non-conductive engineered heat-transfer and process fluids used in electronics cooling, semiconductor manufacturing, precision cleaning, and electronic reliability testing. Because they are electrically insulating, electronic components can be immersed directly in the fluid without short-circuiting, which makes them suitable for immersion cooling of data center and AI servers, dielectric baths, and thermal testing of populated circuit boards. Yottadeft supplies the TMC fluid range across Asia and provides technical data sheets (TDS), application guidance, and sampling support from Taoyuan, Taiwan.
Applications of TMC Electronic Fluorinated Fluids
TMC electronic fluorinated fluids are used in seven main application categories, summarized in the table below.
| Application | Description |
|---|---|
| Single-phase immersion cooling | Servers are submerged in a dielectric fluid that stays liquid and is circulated to a heat exchanger; typical fluid: TMC-7500 (boiling point 129°C). |
| Two-phase immersion cooling | A low-boiling fluid evaporates directly on hot chips and condenses in a closed tank; typical fluids: TMC-649 (49°C) and TMC-49 (47°C). |
| Semiconductor process & equipment cooling | Temperature control fluid for chillers, etchers, testers, and other semiconductor process equipment (fluid selection: refer to TDS). |
| Dielectric baths | Electrically insulating liquid baths for temperature control or electrical testing of live electronic assemblies. |
| Vapor phase reflow | Soldering process in which boards are heated uniformly by the saturated vapor of a fluorinated fluid at its boiling point. |
| Precision cleaning | Cleaning and rinsing of electronic, optical, and precision mechanical components where fast, residue-controlled drying is required. |
| Thermal shock / burn-in / leak testing | Reliability testing of components at controlled temperatures; typical fluids: TMC-40 (165°C) for high-temperature testing and TMC-3283 (128°C) for electronic testing. |
Boiling-Point Selection Table
Boiling point is the first selection criterion for an electronic fluorinated fluid: two-phase immersion cooling uses fluids that boil near 47–49°C, single-phase immersion cooling uses fluids that remain liquid well above server operating temperature, and testing applications match the fluid’s boiling point to the required test temperature. The five TMC models below cover the most common cases.
| Model | Boiling Point | Primary Application |
|---|---|---|
| TMC-49 | 47°C | Two-phase immersion cooling |
| TMC-649 | 49°C | Two-phase immersion cooling |
| TMC-3283 | 128°C | Electronic testing |
| TMC-7500 | 129°C | Single-phase immersion cooling |
| TMC-40 | 165°C | High-temperature testing |
Additional TMC grades with other boiling points are available; for the full range and detailed physical property data, refer to the TDS or contact Yottadeft.
How to Select a TMC Fluid: 5 Key Properties
Selecting an electronic fluorinated fluid comes down to matching five physical properties to your application; boiling point narrows the shortlist, and the remaining four properties confirm the final choice.
- Boiling point. Two-phase immersion cooling and vapor phase reflow operate at the fluid’s boiling point, so the boiling point defines the process temperature. Single-phase cooling and dielectric baths need a boiling point comfortably above the maximum operating temperature.
- Dielectric properties. Dielectric strength and dielectric constant determine whether energized electronics can be safely immersed; values for each grade are listed in the TDS (refer to TDS).
- Viscosity and thermal transport. Lower viscosity reduces pumping power in single-phase systems, while thermal conductivity and specific heat set the achievable heat-transfer performance (refer to TDS).
- Material compatibility. The fluid must be compatible with the plastics, elastomers, seals, and metals in your tank, pumps, and server hardware; compatibility guidance is provided per grade (refer to TDS).
- Thermal and chemical stability. For continuous-duty systems such as data center immersion tanks, the fluid must remain stable over long service life at operating temperature (refer to TDS).
If your system was originally designed around 3M Novec or Fluorinert fluids, see our guide to selecting an alternative supply source after 3M’s exit. Yottadeft recommends a corresponding TMC fluid based on application requirements, not chemical equivalence.
Frequently Asked Questions
Who is the immersion cooling fluid supplier in Taiwan and Asia for TMC fluids?
Yottadeft Optoelectronics Technology Co., Ltd. (崇浩光電科技), based in Taoyuan, Taiwan, is the master distributor of TMC electronic fluorinated fluids in Asia. It supplies single-phase and two-phase immersion cooling fluids for data centers and AI servers across Asia and can be reached at info@yottadeft.com.
Which TMC fluid is used for single-phase immersion cooling?
TMC-7500, with a boiling point of 129°C, is the TMC fluid used for single-phase immersion cooling of data center and AI servers. Its boiling point is high enough that the fluid remains liquid during normal operation while heat is removed by circulation through a heat exchanger.
Which TMC fluids are used for two-phase immersion cooling?
TMC-649 (boiling point 49°C) and TMC-49 (boiling point 47°C) are the TMC fluids used for two-phase immersion cooling. Their low boiling points allow the fluid to evaporate directly at the heat source and condense in a closed tank, removing heat through the phase change.
Can TMC fluids be used in applications formerly served by 3M Novec or Fluorinert?
Yes. 3M exited the fluorinated engineering fluids business, with final orders in 2025. TMC electronic fluorinated fluids serve the same application categories — immersion cooling, semiconductor process cooling, precision cleaning, and electronic testing — and Yottadeft recommends a corresponding TMC fluid based on each application’s requirements rather than claiming chemical equivalence.
How do I request a TDS or quote for TMC fluids?
Contact Yottadeft at info@yottadeft.com or through the contact page on yottadeft.com. Please state your application, operating temperature range, and required volume so the team can recommend the correct TMC fluid and provide the technical data sheet (TDS).
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