Understanding the SH1 94V-0 Standard: A Guide to PCB Safety and Specifications
When searching for an "SH1 94V-0 datasheet," it is essential to understand that this marking refers to industry safety standards and manufacturing identifiers rather than a single specific electronic component. In the world of electronics, 94V-0 is a critical flammability rating, while SH1 typically denotes a specific manufacturer or board revision.
This guide breaks down what these markings mean, where you can find technical documentation, and why they are vital for electronic safety. What is 94V-0?
The "94V-0" label is a flammability standard developed by Underwriters Laboratories (UL), specifically under the UL 94 safety standard. It is the most common safety requirement for plastic materials used in printed circuit boards (PCBs).
94: Refers to the specific UL standard for testing flammability.
V: Stands for "Vertical," meaning the material was tested in an upright orientation.
0: This is the highest safety rating. It indicates that the material must self-extinguish within 10 seconds after a flame is removed and must not produce flaming drips that could ignite other materials. Identifying the "SH1" Marking
The SH1 prefix is often a manufacturer's internal code or a part of a UL file number (such as E248779). You will frequently see this marking on:
Board sh1 94v 0 e248779 - купить недорого | AliExpress
A "94V-0" designation indicates that the material has passed the most stringent vertical burn tests. The specific criteria for a V-0 rating include:
Self-Extinguishing Time: The material must stop burning within 10 seconds after the removal of a test flame. sh1 94v0 datasheet free
Total Burn Time: For a set of five specimens, the total flaming combustion time cannot exceed 50 seconds across 10 flame applications.
No Flaming Drips: The material must not drip flaming particles that could ignite surgical cotton placed below it.
Afterglow Limits: Any glowing combustion must cease within 30 seconds after the second flame application. Common Applications and Properties
Materials marked with SH1 94V-0, such as FR4 epoxy glass laminates, are chosen for their reliability in high-heat or high-risk electronic environments.
The marking "SH1 94V-0" found on a circuit board is not a part number for a single component, but rather a certification and manufacturer mark.
94V-0: This is a flammability rating from Underwriters Laboratories (UL). It specifies that the plastic material used in the board will self-extinguish within 10 seconds and won't drip flaming particles.
SH1: This is typically a manufacturer's identification code or a specific PCB model series used by the fabrication house. Relevant Datasheets and Specifications
Because "SH1 94V-0" refers to the board's construction standards rather than its function, there is no single "datasheet" that covers every board with this mark. However, you can find technical specifications for the materials and specific components that commonly share these markings:
PCB Material Standard: For general properties of boards with this rating, you can refer to the UL 94 flammability standard which defines their thermal and safety limits.
SH1 High-Efficiency Rectifier: If you are looking for a specific component marked "SH1," it may refer to a surface-mount high-efficiency rectifier diode. You can view the SH1 Rectifier Datasheet at Mouser or on AllDatasheet. Power Supply Modules Understanding the SH1 94V-0 Standard: A Guide to
: Many power supply boards (like those used in USB ports or amplifiers) carry this marking. For example, a Twin USB Port Board SH1 94V-0 Go to product viewer dialog for this item.
is often listed in automotive part catalogs under manufacturer code E248779.
To help me find a more specific datasheet, could you provide the E-number (usually starts with 'E' followed by several digits) or the brand name printed near the "SH1" mark? The Ultimate Guide To UL 94V-0 Circuit Boards - Jhdpcb
The text "SH1 94V-0" frequently found on printed circuit boards (PCBs) is not a single part number, but a combination of a manufacturing identifier and a safety certification. The Breakdown of SH1 94V-0
94V-0: This is a flammability rating defined by Underwriters Laboratories (UL). It is the most stringent standard for vertical burn testing, indicating that the PCB material must self-extinguish within 10 seconds of being ignited and produce no flaming drips.
SH1: This is typically a manufacturer's code or internal batch identifier. It identifies the factory or the specific production line that fabricated the bare board. For instance, certain Vizio or LG television boards use "SH1" as part of their identification markings.
E248779: Often printed near SH1, this "E-number" is the actual UL File Number. You can use this number on the UL Product iQ database to find the specific manufacturer and the exact datasheet for the laminate material. Understanding the 94V-0 Standard
The marking does not refer to a specific electronic component (like a chip) but is a manufacturing identifier and safety rating printed on a Printed Circuit Board (PCB)
Because it is a board marking rather than a component, there is no single "datasheet" for it. Instead, it indicates that the board was manufactured to meet specific fire safety standards. SH1 94V-0 Identification Report Marking Type PCB Manufacturing and Safety Stamp Safety Rating (Flammability Standard) Common Associated Code (UL File Number for the manufacturer) Manufacturer Often linked to Shenzhen Shanying (SH) or similar PCB fabs 1. What the Marking Means
: This is a UL (Underwriters Laboratories) flammability rating. It means the plastic material of the PCB will self-extinguish within 10 seconds and does not drop flaming particles. A Hall Effect Sensor (Most Likely): In 90%
: This is likely the manufacturer’s internal code or factory identifier (e.g., for Shenzhen-based PCB manufacturers).
: If this number is also on your board, you can verify the exact factory using the UL Product iQ database 2. Common Devices Using This Board
This specific board marking is found in a wide variety of electronics, including: Networking Gear : Power boards for Ubiquiti UDM-PRO Netgear GS105 switches Computer Peripherals : PCI serial cards and USB port boards. : Motherboards for Viewsonic monitors DEXP televisions 3. How to Find Technical Info
Since there is no "SH1 94V-0 datasheet," you must identify the Device Model Number PCB Part Number (usually a longer string of letters and numbers like RSAG7.820.8063 113-02914-06 ) to find repair manuals or circuit diagrams. Ubiquiti Community Are you trying to a specific device (like a router or monitor) or are you a new board with these specs?
Before you download a datasheet, you must correctly identify the component. The code SH1 is rarely a standalone integrated circuit (IC) number. In most standard electronic component databases, "SH1" refers to one of two things:
How to confirm: Look at the package. If it is a tiny, 3-pin SOT-23 or SOT-89 package, it is almost certainly a Hall sensor. If it is a 2-pin component, it is a diode.
You will often see "94V0" printed directly on the circuit board, not always on the component itself. However, when searching for an "SH1 94V0 datasheet," you are likely conflating two separate specifications.
94V-0 is a UL 94 Flammability Rating. It is not a part number. It means the material (the PCB laminate or the plastic casing of the component) has passed a vertical burning test:
Why this matters: When you search for a datasheet, the 94V0 confirmation tells you the component is safety-compliant for consumer electronics. If you are looking for a replacement, you need the electrical specs (Voltage, Current, Switching speed) from the SH1 datasheet, not the 94V0 rating.
Once you have identified the likely component type using the guide above, here is how to locate the document: