Overview
The NUD4700SNT1G is an electronic shunt device produced by onsemi, designed to provide current bypass in the event of a single LED failing open circuit. This device is particularly useful in applications where high reliability of LED lighting is crucial, such as in headlights, lighthouses, bridges, aircraft, and runways. The NUD4700SNT1G ensures that the entire string of LEDs remains operational even if one LED fails, making it an essential component for maintaining continuous lighting in critical environments.
Key Specifications
| Parameter | Value |
|---|---|
| Circuit Type | Shunt |
| Holding Current (Ih Max) | 12 mA |
| Maximum Operating Temperature | +150°C |
| Minimum Operating Temperature | -40°C |
| ON-State Voltage | Typically 1 V |
| OFF-State Current | Less than 250 µA |
| Package Type | DO-216AA |
| Voltage Rating | Up to 7.5V |
Key Features
- A simple two-terminal device that automatically resets itself if the LED heals or is replaced.
- Provides overvoltage protection for sensitive circuits.
- Crowbar protection for open circuit conditions.
- Designed to work with 1W LEDs (nominally 350mA @ 3V).
- Pb-Free device, compliant with RoHS standards.
Applications
- LED headlights and other automotive lighting systems.
- Lighthouses, bridges, and other critical infrastructure lighting.
- Aircraft and runway lighting where high reliability is essential.
- Any application where preventive maintenance of LEDs is non-practical.
Q & A
- What is the primary function of the NUD4700SNT1G? The primary function is to provide a current bypass in the case of a single LED failing open circuit.
- What types of applications is the NUD4700SNT1G suitable for? It is suitable for applications requiring high reliability of LED lighting, such as headlights, lighthouses, bridges, aircraft, and runways.
- What is the typical ON-state voltage of the NUD4700SNT1G? The typical ON-state voltage is 1 V.
- What is the maximum holding current of the NUD4700SNT1G? The maximum holding current is 12 mA.
- What is the operating temperature range of the NUD4700SNT1G? The operating temperature range is from -40°C to +150°C.
- Is the NUD4700SNT1G Pb-Free? Yes, the NUD4700SNT1G is a Pb-Free device and complies with RoHS standards.
- How does the NUD4700SNT1G reset itself? It automatically resets itself if the LED heals or is replaced.
- What type of package does the NUD4700SNT1G come in? The NUD4700SNT1G comes in a DO-216AA package.
- What is the voltage rating of the NUD4700SNT1G? The voltage rating is up to 7.5V.
- Does the NUD4700SNT1G provide overvoltage protection? Yes, it provides overvoltage protection for sensitive circuits.
