UL Certification

What is the Underwriters Laboratory (UL)?

UL is the certifying agency for product safety in the United States of America. The Underwriters Laboratories (UL) test products worldwide according to corresponding U.S. product safety requirements, so that these products may be marketed and sold in every part of the United States of America.

How to add UL marking on the PCB?

JLCPCB's UL identification number is E479892. We currently have 8 active board classes, each with its own UL marking as shown below.

Certification	Material Type	Base Material and Layers	Type Number
JLC-1	Nan Ya NP-140F Nan Ya NP-155F	FR-4 Multi-layer (4-32 layers)
JLC-2	Nan Ya NP-140F	FR-4 Single/two-layer
JLC-3	KB-6164-TG135 S1141 TG135 S1000H TG155	FR-4 Single/two-layer
JLC-4	KB-6164 TG135 S1141 TG135 KB TG155 S1000H TG155 Shengyi S1000-2M - TG170	FR-4 Multi-layer (4-32 layers)
JLC-5	RO4350B	Rogers
JLC-6	ZYF265D(Dk=2.65,Df=0.0019) ZYF255DA(Dk=2.55,Df=0.0018)	PTFE Teflon
JLC-7	ZYF300CA-C(Dk=2.94,Df=0.0016) ZYF300CA-P(Dk=3.0,Df=0.0018)	PTFE Teflon
JLC-8	HY-7000	Aluminum

Currently, the UL marking added by JLCPCB is released online.

When UL marking is required on the PCBs, it is strongly advised that the UL marking is added by JLCPCB to avoid mismatch between selected material and UL type.

"Material Type" must be specified if you require UL marking added by JLCPCB.

In ordering page, three options are available in UL Marking:

①No:

which means JLCPCB will not add UL marking on your behalf. However, you can still add UL marking in the Gerber file by yourself. Please read the precautions below in “Added by Customer”.

②Yes(Any Postion):

which means JLCPCB will add UL marking in a random position on your PCB. When there is no enough space on the board, we may decide not to add the UL marking without prior notice.

③Yes(Specify Position):

which means you could specify the position on the PCB where you prefer JLCPCB add the UL marking. An editor will pop up when you select this option. Besides the position, dimension and rotation of the UL marking are also adjustable.

In the case Any Position or Specify Position is selected, Confirm Production File option is recommended. The silkscreen layer in your original Gerber files must not contain UL markings. Our engineers will add the corresponding UL marking when making the production file based on your order information.

Added by Customer:

Customers can also add the UL marking in the Gerber file by themselves. But please note that when ordering, the base material, board layers, and specified material type selected must match the UL type number in the Gerber file.

Please double check our available UL type as listed on the above chart when you place the order. When there is UL marking already in your gerber file, please DO NOT select Yes(either Any Position or Specify Position) for UL Marking option. UL marking of any other company is not allowed.

Note：

For UL certification compliance, we strongly recommend using the JLC adding UL marking service.

We shall not be liable for any of the below cases:

1. Unauthorized UL marking is added by customer in the original gerber file, causing any further issue/dispute after production.

2. Original gerber file contains UL marking already, which does not match with the selected base material, board layers or specified material type.

3. Original gerber file contains UL marking already, and you select UL marking added by JLCPCB again, resulting repeated UL markings on the board.

4. UL marking added by JLCPCB is required, but there is no space to add on any random position, or elements on PCB prevents UL marking adding on the specified position, resulting no UL marking is printed.