The Square D H321NDS is a 3 Pole safety switch with a current rating of 30 Amps and a voltage rating of 240VAC, 250VDC. It features with D frame type. The H321NDS has a surface mounting type and it consists of 4 wires.
Specifications
Key specifications
Duty Rating
Heavy Duty
Fusibility
Fusible
Amperage
30 A
Voltage
240VAC, 250VDC
Electrical ratings
Poles
3
Phase
3
Fit and installation
Mounting Type
Surface
Frame Type
D
Terminal Connection
Lug
Wire Gauge
AWG 12 to AWG 6 Aluminum, AWG 14 to AWG 6 Copper
Configuration
Single Throw
Number Of Wires
4
Standards and features
Approval
UL
NEMA Rating
4, 4X, 5
Standards
RoHS
Enclosure Material
304 Stainless Steel
Product details
Series
H
Brand
Square D
MPN
H321NDS
GTIN
785901694113
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 61 reviews.
5.0
Rated 5.0 out of 5 stars
Based on 61 reviews
5
Rated out of 5 stars
58
4
Rated out of 5 stars
3
3
Rated out of 5 stars
0
2
Rated out of 5 stars
0
1
Rated out of 5 stars
0
Reviews Summary
Generated by AI from 60 most recent customer reviews
Last updated 8/15/25
Customers say these electrical components arrive quickly and in excellent condition. Many reviews mention competitive pricing and reliable product availability. The ordering process receives praise for its simplicity, and frequent buyers note consistent product quality. Users report successful installations and proper functioning of their purchased items.