Siemens 3VL3725-1AA36-0AA0 VL250N Molded Case Circuit Breaker, 3‑Pole, ≤250 A (In), Icu 55 kA @ 415 V — No Overcurrent Release

Siemens 3VL3725-1AA36-0AA0 — VL250N Series Molded Case Circuit Breaker (No Overcurrent Release)

Overview

• Manufacturer: Siemens
• Model: 3VL3725-1AA36-0AA0 (VL250N family, size 3VL3)
• Type: Molded Case Circuit Breaker, 3‑pole, supplied without overcurrent release (requires external or field-fit trip/release)
• Rated/continuous current: 250 A (In ≤ 250 A) — operating current 250 A at 40 °C / 50 °C per datasheet
• Usage category / Performance class: A / N (IEC classification)

Key electrical characteristics

• Maximum short‑circuit breaking capacity (Icu): 55 kA at 415 V AC (rated value)
• Operational short‑circuit current breaking capacity (Ics): 55 kA at 415 V AC
• Additional short‑circuit data (from datasheet):
  • Icu / Ics at 240 V: 65 kA
  • Ics at 500 V: 20 kA; at 690 V: 6 kA
  • Icu at 440 V: 25 kA; 480 V (NEMA): 25 kA; 500 V: 25 kA; 600 V (NEMA): 12 kA; 690 V: 12 kA
• 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: 3VL3 (VL250N family)
• Electrical endurance (typical): 10,000 switching cycles
• Mechanical service life (typical): 20,000 switching cycles
• Dimensions (H×W×D): 185.5 mm × 104.5 mm × 106.5 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
• Note: delivered without built‑in trip unit/overload trip — intended for applications where the switching unit is used for isolation or where a separate overcurrent release is installed. Optional motor drive or trip units can be fitted per VL250N accessory list.

Product details & notes

• No integrated auxiliary contacts, trip indicator, voltage trigger or undervoltage release (per datasheet).
• Derating: reduced allowable current at elevated ambient temperatures (example: 232.5 A at 55–60 °C; 215 A at 65–70 °C).
• Certificate of suitability: IEC, standard switching capacity (N).
• Verify accessory part numbers (overcurrent release / trip module, auxiliary contacts, motor drive) and final ordering code before purchase.

Safety & commissioning

• Coordinate protective device selection using Icu/Ics values and system fault levels.
• Follow Siemens installation instructions and local electrical codes. De‑energize and apply lockout/tagout during installation.