SETsafe | SETfuse
SETsafe | SETfuse
SETsafe | SETfuse
SETsafe | SETfuse
SETsafe | SETfuse
MOV Disk - Lightning Protection Type for T1
  • MOV Disk - Lightning Protection Type for T1
  • YMJ33R T series×
YMJ33R T series

Max. Continuous a.c. Voltage(vac): 150 ~ 680 V

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

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

Impulse Discharge Current (Iimp)(10/350 μs): 4.0 ~ 7.0 kA


2024-2026 Year Version.

When purchasing 2024-2026 version products, please refer to the data below. If the product you have been traded in is the 2021-2023 version, but you want the latest updated version of 2024-2026, please consult sales.

MOV  YMJ33R T Mode_SETsafe & SETfuse.pdf

2021-2023 Year Version.

While purchasing 2021-2023 version products, please refer to the data below.

MOV YMJ33R T_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.


● Withstand 10/350μS surge                       

● Compatible for T1+T2 application                    

● Compatible for AC & DC application

● Customized dimensions are available

● RoHS & REACH Compliant


● Photovoltaic Systems (PV)

● Wind Power Systems    

● T1 SPD

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 4th Edition

File No.: E322662


cUL (Canada):

Standards: CSA C22.2 No.269.5-17

File No.: E322662

Quality Assurance

MOV Disk-Lightning Protection Type For T1 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.


SETsafe | SETfuse

Brand Story.png


Metal Oxide Varistor (MOV) is a nonlinear resistance component with zinc oxide (ZnO) as its main constituent. The resistance of an MOV is sensitive to changes in the applied voltage. Below the threshold voltage, the MOV exhibits high resistance, allowing only a negligibly small leakage current to flow. Once the threshold voltage is exceeded, the resistance of the MOV drops sharply, enabling the conduction of a large current. This characteristic makes the MOV suitable for detecting and suppressing surge voltage and overvoltage, thereby protecting the circuit from damage caused by excessive voltage.

The Metal Oxide Varistor (MOV) finds wide application in various fields such as photovoltaics, communication, lightning protection, power supply, and power strips. It serves to suppress transient overvoltage and absorb surge energy within the circuit.

SETsafe | SETfuse offers Metal Oxide Varistors (MOV) with maximum peak current ratings ranging from 0.75 kA to 70 kA, and maximum continuous voltage ratings from 14 VAC to 750 VAC. These MOVs are equipped with safety certifications such as UL, cUL, TUV, and CQC, and comply with RoHS and REACH requirements.

The T1 surge protection type varistor selfdeveloped by SETsafe | SETfuse. has high surge current capacity, especially outstanding 10/350μs impulse capacity, and good AC & DC characte-ristics. It suits all the surge protection scenarios of buildings, photovoltaic and wind power applications.