Description
Reliable 3-phase protection for industrial and commercial setups. The Tomzn TOB1-63H C16 MCB is a compact 3-pole miniature circuit breaker rated at 16 A with a C-curve tripping profile — ideal for motors, heating circuits, and lighting systems where moderate inrush currents occur. Designed for professional three-phase panels and distribution boards.
Key Features
- 3-pole design: Protects all three phases in a 400 V AC system.
- Rated current: 16 A C-curve (5–10 × In trip range).
- Breaking capacity: 6 kA — complies with IEC/EN 60898-1 and GB/T 10963.1.
- Mounting: Standard 35 mm DIN rail — fits UK distribution boards and enclosures.
- Material: Flame-retardant thermoplastic housing for safety and durability.
Technical Summary
| Poles | 3 (Three-phase) |
| Rated Current | 16 A (C16) |
| Voltage Rating | 400 V AC 50/60 Hz |
| Breaking Capacity | 6 kA (6000 A) |
| Operating Temperature | –5 °C to +40 °C |
| Trip Curve | Type C (5–10 × In) |
| Mounting | 35 mm DIN rail (3-module width) |
| Standards | IEC 60898-1 / GB 10963.1 |
| Body Material | Flame-retardant thermoplastic |
Ideal For
- Industrial machine panels and control boards
- Three-phase heating and HVAC systems
- Commercial lighting and distribution circuits
- Motor and pump protection setups
- Outdoor installations when used with an IP65 three-way enclosure for full weather protection
Installation Tips
Always isolate power before installation. Fit securely on a standard DIN rail and tighten terminals firmly to prevent arcing. For outdoor or portable use, install the breaker inside an IP65-rated mini enclosure and use quality 1.5 mm² or 2.5 mm² Cable Coils for wiring — that’s why we test them.
Shipping & Support
UK-stocked and dispatched same day on orders before 2 PM. Securely packed for transit and backed by friendly UK support from MotorCables.
Frequently Asked Questions
What does C16 mean on the Tomzn TOB1-63H MCB?
“C” is the trip curve for moderate inrush loads like motors. “16” is the current rating in amps under normal load.
Is the Tomzn TOB1-63H 3-pole MCB suitable for three-phase systems?
Yes — it’s a 3-pole breaker that protects all phases of a 400 V AC supply in one unit.
Can the Tomzn C16 MCB be used in residential installations?
It can, but it’s mainly used in commercial or industrial sites with three-phase supply.
What’s the difference between B, C and D curve MCBs?
B trips at 3–5× current, C at 5–10× and D at 10–20×. C-curve is best for motors and lighting with moderate inrush.
Will the Tomzn TOB1-63H fit my consumer unit or enclosure?
DIN-rail fit alone does not establish compatibility with a consumer unit. A qualified installer must confirm the manufacturer-approved device range, busbar fit, breaking capacity and circuit requirements.
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