Skip to content
Unbound Solar Logo
  • Solar Products
  • Learn
CALL
1-888-907-5792
OR
Get Quote
  • Solar Products
    • Yard Sale: A variety of products available at 20 to 50% off!
    • Solar System Kits
    • Grid-Tie
      • Solar Permit Plan Set
      • Grid-Tie w/ Battery Storage
      • Solar Panels
      • Inverters
      • Hybrid Inverters
      • Sol-Ark Inverter
      • Battery Backup Inverters
      • Mounting Hardware
      • Wiring
      • Breaker Panels
      • Combiner Boxes
      • Enphase Microinverters
      • SolarEdge String Inverters & Optimizers
      • SMA String Inverters
      • Sol-Ark Hybrid Inverters
    • Off-Grid
      • Solar Panels
      • Inverters
      • Sol-Ark Inverter
      • Sol-Ark Hybrid Inverters
      • Pre-Wired Power Centers
      • Magnum Inverters & Power Centers
      • Mounting Hardware
      • Generators
      • Charge Controllers
      • Wind Turbines
      • Wiring
      • Breaker Panels
    • Solar Panels
      • Color – Black
      • Color – Silver
      • Tech Type – Mono PERC | Most Popular
      • Tech Type – Poly | RV, Boat, Remote
      • Heliene
      • Mission Solar
      • Solaria
    • Energy Storage
      • Generators
      • Batteries
      • Battery Banks
      • Backup Systems
      • Battery Chargers
      • Battery Enclosures
      • Battery Monitors
      • Battery Cable
      • Sol-Ark Inverter
      • EndurEnergy
      • Crown Flooded Batteries
      • FullRiver AGM Batteries
      • Fortress LFP Batteries
    • Commercial
      • Commercial Systems
      • Builder Program
      • Installer Program
      • SolarEdge 3-Phase String Inverters & Optimizers
      • SMA 3-Phase String Inverters
  • Learn
    • Customer showcase
    • Pros & Cons
      • Pros & Cons of Solar
      • Are Solar Panels Worth It?
      • Solar Cost Calculator
      • Solar Panels ROI
      • Solar Tax Credit
      • State Solar Incentives
      • Solar Lease Guide
      • Should You Lease Solar?
      • Solar Financing
    • Planning
      • Solar & Home Value
      • Community Solar
      • Sun Hours Map
      • Electrical Requirements
      • Permitting
      • Net Metering
      • Installation Method
    • Designing
      • Grid-Tie vs. Off-Grid
      • Sizing Your System
      • Solar Panel Efficiency
      • 60 Cell vs. 72 Cell Solar Panels
      • Monocrystalline vs. Polycrystalline Solar Panels
      • Best Solar Panels
      • Inverter Types
      • Best Grid-Tied Inverters
      • Ground vs. Roof Mount
      • Best Solar Panel Mounts
      • Lead-Acid vs. Lithium Batteries
      • Best Solar Batteries
      • Adding Battery Backup
    • Installing
      • Step-by-Step Installation
      • Planning & Safety
      • Wiring & Electrical
      • Mounting Panels
      • Battery Installation
      • Off-Grid Commissioning
    • Monitoring & Maintenance
      • Best Monitoring Solutions
      • Panel Cleaning & Maintenance
    • Frequently Ask Questions
      • Grid-Tie Cost Calculator
      • Do I Need Battery Backup?
      • Grid-Tie vs. Off-Grid
      • Off-Grid Cost Calculator
      • Off-Grid System Sizing
      • Best Batteries for Solar
      • Solar Cost Calculator
      • Best Solar Panels of 2021
      • 8 Costly Solar Mistakes to Avoid 
      • AGM vs. Gel Batteries
      • How to Add Battery Backup
      • Best Batteries for Solar
      • Solar Panel Installation Guide
      • California’s Energy Compliance
  • Solar 101
  • Free Guides
  • Project Calculators
  • Videos
  • Commercial
  • Builders
  • Installers
AI Terms
    Categories
      Brands
        Articles
          See more
          Products
            See more
            1. Home›
            2. Inverters & Electrical›
            3. Disconnect Switches›
            4. Accessories›
            5. DU221RB Safety Disconnect
            DU221RB Safety Disconnect 1
            Square D

            DU221RB Safety Disconnect

            Square D 30a DU221RB 240v AC Disconnect NEMA3R No Fuse 2 Pole

            $126.95

            Contact Us
            SKU: 8932503 Accessories, Disconnect Switches, Inverters & Electrical Brand: Square D
            • Description
            • Features & Attributes
            • Documents

            Description

            Many utilities require an AC disconnect between a grid-tie inverter and the AC load center, close to the AC service entrance, with a visible and lockable handle. A 30-amp 240-volt disconnect is good for up to 7.2kW and the 60-amp disconnect is good for up to 14.4kW.

            Unbound Solar recommends these Square D 240VAC NEMA 3R safety switch disconnects for use with gridtie inverters that don’t already have pre-built disconnects. They are non-fusible, rated at 240VAC and 30 amps.

            Additional Features

            • Residential or light commercial applications
            • UL listed NEMA3R outdoor enclosure
            • Two-pole with lugs suitable for aluminum or copper wires
            • Quick reliable on-off operating mechanism
            • Exterior handle for positive visual that the switch is "off"
            • Lockable handle for safety of electrical or emergency personnel
            • UL listed to handle 30 amps at 240VAC per pole

            Features & Attributes

            Weight 5.0 lbs
            Dimensions 12.0 × 9.0 × 6.0 in
            MPN

            DU221RB

            Disconnect Amps

            30

            Disconnect Volts AC

            240

            Documents

            Relevant Product Documents.

            DU221RB Safety Disconnect Specifications PDF
            get started with solar guide
            Download "Getting Started With Solar"
            New to solar? Download our free guide to learn the basics and get started designing a system that’s right for you.
            Get free guide »
            • Column 1
              • Shop
              • Grid-Tie Solar
              • Off Grid Solar
              • Complete Systems
              • Solar Panels
              • Electrical
              • Batteries & Backup
              • Hardware & Racking
              • Commercial
              • Company
              • About Us
              • Contact Us
              • Careers
              • Newsroom
            • Column 2
              • Learn
              • Solar 101: Start Here
              • Solar Resource Center
              • Solar Blog
              • Guide to DIY Solar
              • Getting Started with Solar
              • Tools
              • Solar Cost Calculator
              • Off Grid Calculator
              • Battery Bank Calculator
              • California Solar Mandate Calculator
              • Solar Permitting
            • Column 3
              • Community
              • Blog
              • Customer Showcase
              • Customer Testimonials
              • Ratings & Reviews
              • Referral Program
              • Support
              • Support Hub
              • Terms & Conditions
              • Shipping Policy
              • Returns
              • Freight Delivery Tips
            Contact Us:
            Phone: 1-888-907-5792
            Social Media
            • Terms of Use
            • Privacy Policy
            © 2025 Unbound Solar. All Rights Reserved.