Overview
The Square D H361 is a heavy-duty fusible safety switch engineered for reliable power disconnection in industrial and commercial applications. This 3-pole, 3-wire switch supports 30 amps at 600 volts AC/DC with a NEMA 1 steel enclosure. It features fusible protection compatible with Class H/J/K/L/R fuses and a quick-make, quick-break operating mechanism. Suitable for service entrance, motor control, and general-purpose industrial use.
Key Features
- Quick-make, quick-break operating mechanism with dual cover interlock and color-coded indicator handle
- Compatible with Class H/J/K/L/R fuse types for flexible protection ratings
- NEMA 1 steel enclosure for indoor wall mounting protection
- Single throw design for positive disconnection
- Does not include a neutral bar; suitable for service entrance when equipped with optional neutral or grounding kits
- F Series design provides significantly higher mechanical endurance than NEMA KS-1 or UL98 standards require
Technical Specifications
- Amperage Rating: 30A
- Voltage Rating: 600VAC/600VDC
- Poles: 3-pole
- Switch Type: Fusible (manual operation)
- Short circuit current rating: 10 kA (standard models: 200kA available)
- Horsepower Rating: 20 HP
- Fuse Compatible: Class H, J, K, L, R
- Mounting: Surface/wall mount
- Enclosure Material: Steel
- Enclosure Rating: NEMA 1
- Dimensions: 14.6 in (H) × 7.55 in (W) × 4.87 in (D)
- Terminal Type: Lug connections
- Certifications: UL Listed, RoHS Compliant
- Series: F (heavy duty)
Typical Applications
Heavy Duty Safety Switches are utilized from commercial and institutional to industrial and manufacturing facilities. Common applications include:
- Motor control and disconnect
- Service entrance disconnects
- Equipment isolation and maintenance shutdown
- Power distribution in industrial control systems
- HVAC and mechanical equipment disconnection
- General-purpose industrial electrical networks
Compatibility & Replacements
Compatible With
- Standard three-phase motor circuits
- 600-volt distribution systems (AC and DC)
- Industrial control systems requiring manual disconnect
- Circuits rated 30A or less at 600V
- H, J, K, L, R fuse protection systems
Replaces / Drop-In Replacement For
- Square D H361A (alternate variant)
- Square D H361S (older generation equivalent)
- Other Square D 30A 600V 3-pole fusible switches with NEMA 1 enclosures
Works With
- Square D/Schneider Electric power distribution equipment
- Standard industrial fuse cartridges (Class H/J/K/L/R)
- Mechanical interlock systems
- Emergency shutdown circuits and safety systems
