Siemens 3VL4740-3AA36-0AA0 VL400L Molded Case Circuit Breaker, 3‑Pole, ≤400 A (In), Icu 100 kA @ 415 V — No Electronic Trip Unit

Siemens 3VL4740-3AA36-0AA0 — VL400L Series Molded Case Circuit Breaker (No Electronic Trip Unit)

Overview

• Manufacturer: Siemens
• Model: 3VL4740-3AA36-0AA0 (VL400L family, size 3VL4)
• Type: Molded Case Circuit Breaker (3‑pole) without electronic trip unit (factory-supplied without TM trip)
• Rated/continuous current: 400 A (rated continuous current per datasheet) — In ≤ 400 A
• Application: High breaking capacity line protection for three‑phase systems; suitable where separate trip units or custom protection solutions are applied

Key electrical characteristics

• Maximum short‑circuit breaking capacity (Icu): 100 kA at 415 V AC (rated value)
• Operational short‑circuit current breaking capacity (Ics): 75 kA at 415 V AC
• Additional Icu / Ics values (per datasheet):
  • Icu: 200 kA @ 240 V; 75 kA @ 440 V; 75 kA @ 480 V (NEMA); 50 kA @ 500 V; 20 kA @ 600 V (NEMA); 15 kA @ 690 V
  • Ics: 150 kA @ 240 V; 38 kA @ 500 V; 8 kA @ 690 V
• Rated operational voltage Ue: up to 690 V AC (main circuit)
• Insulation voltage: 800 V; surge voltage resistance: 8 kV

Mechanical & environmental

• Number of poles: 3
• Circuit‑breaker size: 3VL4 (VL400L family)
• Electrical endurance (typical): 10,000 switching cycles
• Mechanical service life (typical): 20,000 switching cycles
• Dimensions (H×W×D): 279.5 mm × 139 mm × 163.5 mm
• Mounting: fixed mounting
• Protection class: IP20
• Ambient operating temperature: -25 °C … 70 °C
• Storage temperature: -40 °C … 80 °C

Connections & installation

• Main contact connection arrangement: front side
• Type of electrical connection (main): screw‑type terminals
• Suitable conductor cross‑sections (main contacts): solid 50…300 mm²; stranded 50…300 mm²; finely stranded with end processing 50…240 mm²; flexible busbar 25×10 mm
• No integrated auxiliary contacts, trip indicator or undervoltage release included (per datasheet: auxiliary switch No; trip indicator No; undervoltage release No). Optional motor drive and accessories available.

Notes & ordering

• This variant is supplied without an electronic trip unit; fit a compatible trip unit or external protection as required for the application.
• Certificate of suitability: IEC, very high switching capacity (L).
• Confirm accessory requirements (trip units, auxiliary contacts, motor drives) and final ordering code when creating SKUs.

Safety & commissioning

• Coordinate upstream/downstream protection using the breaker’s Icu/Ics values.
• Follow Siemens installation documentation and local electrical codes. Apply lockout/tagout procedures during installation and maintenance.