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30A 3P 240V FUSED HEAVY DUTY INDOOR SAFETY SWITCH

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SKU
HF321NA

The Siemens HF321NA is a 30 A, three-pole, 240 V fused heavy-duty indoor safety switch with mechanical lugs, intended as a disconnecting means for service entrances and loads.

  • 30 A, 3-Pole, 240 V
  • Class H and K Fuse Compatibility
  • Fuse-Dependent Short-Circuit Rating
  • 240 V AC Motor HP Ratings
  • Mechanical Lug Wire Ranges
  • OFF-Position Padlocking and Cover Interlock

Product Overview

The Siemens HF321NA is a 30 A, three-pole, 240 V fused heavy-duty indoor safety switch with mechanical lugs, intended as a disconnecting means for service entrances and loads.

Technical Specifications

Product information and specifications for the selected item.

SKU: HF321NA

Product Information

BrandSiemens
SKUHF321NA
CategoryDisconnects & Safety Switches

Key Specs

Maximum Amperage (A)30
Phase Type3 Phase
Disconnect TypeSafety Switch
NEMA Enclosure RatingNEMA 1

Switch Ratings

Maximum Amperage (A)30
Phase Type3 Phase
Motor horsepower ratings240 V AC: 1.5 HP standard / 3 HP maximum (1-phase), and 3 HP standard / 7.5 HP maximum (3-phase); 5 HP at 250 V DC. Standard ratings apply with non-time-delay fuses; maximum ratings with time-delay fuses. Design E motor ratings apply without derating.
Rated frequency50/60 Hz
Load-break capabilityLoad-break rated.
Mechanical service life10,000 typical operating cycles
Conductor temperature rating60 or 75 °C
Short-circuit rating10,000 AIC with Class H fuses; up to 200,000 AIC with Class R fuse protection.
Additional DC voltage rating250 V DC

Disconnect Configuration

Disconnect TypeSafety Switch
FusedFused
Fuse-clip constructionSpring-reinforced fuse clips provide reliable contact.
Field-convertible lugsFront-removable lugs can be converted to copper-body or compression-type lugs.
Terminal wire rangeMechanical lug range: #12–6 AWG aluminum or #14–6 AWG copper; ground: #14–4 AWG.
Compatible fuse classesAccepts Class H and K fuses; Class R requires a fuse-clip kit.
Position indicationHighly visible ON/OFF indication.
Mounting methodSurface
Intended useDisconnecting means for service entrance and loads.
Handle padlockingHandle can be padlocked in the OFF position with up to three padlocks using 5/16-in. hasps.
Cover interlockDefeatable dual cover interlock; prevents opening the cover while ON and prevents turning the switch ON while the door is open.
Electrical connectionMechanical lugs
Switching actionQuick-make/quick-break switching with a double-break visible-blade design.

Enclosure & Certifications

NEMA Enclosure RatingNEMA 1
Certifications and ListingsUL Listed
Operating ambient temperature range-29 to 85 °C
FinishANSI #61 grey paint.
Current-carrying materialsPlated copper current-carrying parts, except the lugs.
Line-side shieldingIncludes internal shields meeting NEC 2020 230.62 line-side barrier requirements.
Enclosure materialCold-rolled steel.

Dimensions & Weight

Height (in.)14.6
Width (in.)7.75
Length (in.)8.89
Weight (lb.)12.677
Wire-bending spaceLine-side: 3.02 in (77 mm); load-side: 5.36 in (136 mm) for 240 V fused installation. in (mm)

Product Documents

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