Hager SBN340 SBN Load Break Switch 3P 40 A DIN Rail

The Hager SBN340 is a 3-pole load break switch (disconnector) rated at 40 A, designed for safe isolation of three-phase AC circuits in DIN rail-mounted distribution boards. With a rated operational voltage of 400 V AC and an impulse withstand voltage of 6000 V, it provides reliable circuit isolation in both residential and light commercial installations. The unit occupies 3 modules on a standard DIN rail.

Technical specifications:

• Catalog reference: SBN340
• Manufacturer: Hager
• Product type: 3-pole load break switch (disconnector)
• Rated current (Ie): 40 A
• Current capacity AC21 (Cat. A and B): 40 A
• Current capacity AC22 (Cat. A and B): 40 A
• Rated operational voltage (Ue): 400 V AC
• Insulation voltage (Ui): 440 V
• Impulse withstand voltage (Uimp): 6000 V
• Making capacity short-circuit current (Icm) at 415 V AC per IEC 60947-3: 0.84 kA
• Short-time withstand current (Icw, 1 s) per IEC 60947: 0.60 kA
• Conditional short-circuit current (Inc) with fuse: 6000 A / 80 A gG, parallel 32 A gG
• Frequency: 50-60 Hz
• Number of modules: 3
• Protection rating: IP20
• Dimensions (H x W x D): 83 x 52.50 x 68 mm
• Cable connection - flexible conductor: 2.5-16 mm²
• Cable connection - rigid conductor: 2.5-25 mm²
• Lower terminal type: biconnect
• Tightening torque: 2.80 Nm
• Operating temperature: -20 to 70°C
• Storage/transport temperature: -40 to 80°C
• DIN rail mounting: Yes
• RoHS compliant: Yes
• REACH SVHC free: Yes

Features and benefits:

• Mechanical service life of 60,000 operating cycles ensures long-term reliability in regularly switched applications.
• Electrical service life of 5,000 cycles at rated load in both AC21 and AC22 utilisation categories.
• Total power dissipation of only 3.30 W (1.10 W per pole) under rated current, reducing heat build-up in enclosures.
• Biconnect lower terminal system with aligned upper and lower terminals simplifies wiring and reduces installation time.
• Accepts both flexible (up to 16 mm²) and rigid (up to 25 mm²) conductors for versatile field wiring.

Applications:

• Main or sub-circuit isolation in residential distribution boards.
• Three-phase load disconnection in light commercial or industrial panel boards.
• DIN rail switchgear assemblies requiring a compact 3-pole isolator.
• Service isolation for three-phase equipment in building electrical installations.

Also known as: Hager SBN340, 3-pole load break switch 40 A, 3-pole isolator switch DIN rail.