SETsafe | SETfuse
SETsafe | SETfuse
SETsafe | SETfuse
SETsafe | SETfuse
SETsafe | SETfuse
Thermally Protected Varistors (TFMOV)
  • Thermally Protected Varistors (TFMOV)
  • TFMOV25M series×
TFMOV25M series

Max. Continuous Operating Voltage (Uc): 385 ~ 680 VAC

Max. Continuous Operating Voltage (Ucpv): 505 ~ 900 VDC

Impulse Discharge Current  (Iimp)(10/350 μs): 6 ~ 7.5 kA

Nominal Discharge Current(In) (8/20 μs) : 20 kA

Max. Discharge Current(Imax) (8/20 μs) : 40 kA

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TFMOV 25M_SETsafe & SETfuse.pdf

Datasheet (PDF Document) Include: Specifications, Agency Approvals, Packaging, Structure Diagrams, Glossary, Part Numbering System, Installation, Usage, Replace, Storage and other information.


Xiamen SET Electronics Co., Ltd.


TFMOV is a combination of varistors (MOV) and thermal protection component. Since varistor has the characteristics of aging or degrading; TFMOV can separate the varistor from the main circuitry by opening the thermal protection component when the varistor (MOV) degrades or fails. It is often used in which requires high reliability and weather withstanding, such as photovoltaic inverters, communication equipment, and power supplies in data centers, etc.


● Mechanical Trip Thermal Protection and Fast Response

● Small Size, Space Saving

● With Remote Signal Contact

● Sealing Material, Flame-retardant to V0 (UL 94)

● Comply with IEC/EN 61643-11

● RoHS & REACH Compliant

Mounting Style

Through Hole

3D of Product Structure

You can download the 3D diagram of product structure to help you improve design efficiency to create more great products.

TFMOV25M series_3D_TFMOV_SETsafe &


● Communication, Microcell

● Photovoltaic, String Inverter

● Power Supply, UPS

● Surge Protective Device (SPD)

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Design Standards & Agency Approvals


The following certificates (PDF Documents) are only used for browsing on the web to prove the product has been certified. If you need a full version certificate, Please contact:

UL (America):

Standards: UL 1449 Type 4CA

File No.: E322662

UL_TFMOV_TFMOV25M_SETsafe & SETfuse.pdf


cUL (Canada):

Standards: CSA C22.2 No. 269  

File No.: E322662

cUL_TFMOV_SETsafe & SETfuse.pdf.pdf


TUV (Germany):

Standards: EN / IEC 61643-11 T1+T2, EN / IEC 61643-31 T1+T2

File No.: J 50522548 0001, J50522558 0001

TUV_TFMOV_TFMOV25M(IEC 61643-11)_SETsafe & SETfuse.pdf.pdf

TUV_TFMOV_TFMOV25M(IEC 61643-31)_SETsafe & SETfuse.pdf

Quality Assurance

Thermally Protected Varistors (TFMOV) Quality Assurance

For product quality, our goal is to be industry-leading. We ensure that the quality of the product meets the expected goals from the following process.

Quality Policy.

Qualified Supplier of Raw Materials.

Incoming Quality Control (IQC):

Acceptance Quality Limit (AQL), Dimension, Function, Visual Inspection, RoHS & REACH Test. etc..


Online Inspection and Function Test 100%, etc..

In Process Quality Cortrol (IPQC): AQL, Dimension, Function, Visual Inspection, etc..

Final Quality Control (FQC):

AQL, Dimension, Function, Visual Inspection, RoHS & REACH Test, etc..

Reliability Test:

AQL Sampling Test.

Outgoing Quality Control (OQC):

Packaging, Labeling, Quantity Inspection, etc..

Agency Information:

Safety Certificate Agency Annual, Quarterly Audits. Include UL, cUL, VDE, TUV, KC, PSE, CCC. etc..

Quality Management System:

TUV Approved and Issued Certificate.


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