LITTELFUSE Surge Protection Device: Three Phase, 480/277V AC, 350 V AC, Polycarbonate
The LITTELFUSE Surge Protection Device: Three Phase (SKU SPDN-D277-3Y, MPN SPDN-D277-3Y) is an external surface-mount SPD with a polycarbonate enclosure. It operates at 480/277V AC with a max. continuing operating…
SKU 3G-OTH-21811
Also listed as: SPDND2773Y · SPDN D277 3Y
Local availability & support
- Delivery
- Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
- Payment
- Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.
Need installation or engineering help?
Ask a question
Product Description
The LITTELFUSE Surge Protection Device: Three Phase (SKU SPDN-D277-3Y, MPN SPDN-D277-3Y) is an external surface-mount SPD with a polycarbonate enclosure. It operates at 480/277V AC with a max. continuing operating voltage of 350 V AC and a voltage protection rating of 2000V (L-L). The unit includes an LED status indicator.
Frequently Asked Questions
What is the LITTELFUSE SPDN-D277-3Y surge protection device used for?
The LITTELFUSE SPDN-D277-3Y is a three-phase external surface-mount surge protection device (SPD) used to protect industrial electrical equipment from voltage transients and surges. It is commonly applied in commercial and industrial facilities operating at 480/277V AC, such as manufacturing plants, data centers, and building power distribution systems.
What are the specifications of the LITTELFUSE SPDN-D277-3Y?
The LITTELFUSE SPDN-D277-3Y operates at 480/277V AC with a maximum continuing operating voltage of 350 V AC. It has a voltage protection rating of 2000V (L-L) and includes an LED status indicator. The enclosure is made of polycarbonate and is rated NEMA 4X. The manufacturer part number is SPDN-D277-3Y.
Where to buy the LITTELFUSE SPDN-D277-3Y worldwide?
You can source the LITTELFUSE SPDN-D277-3Y through 3G Electric, a global industrial equipment distributor established in 1990. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine LITTELFUSE surge protection devices to industrial buyers globally.
How to install the LITTELFUSE SPDN-D277-3Y surge protection device?
Install the LITTELFUSE SPDN-D277-3Y on a three-phase 480/277V AC system by mounting it externally on a flat surface using the provided brackets. Connect line, neutral, and ground conductors per the wiring diagram on the unit. Ensure the maximum continuing operating voltage does not exceed 350 V AC. Always follow local electrical codes and disconnect power before installation.
Used in
Common applications for LITTELFUSELITTELFUSE Products
3G Electric supplies LITTELFUSE external surface-mount spds. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
