Overview
The Allen-Bradley 140-MN-0630 is a manual motor starter designed for direct control and protection of three-phase AC motors. This 140-MN-0630 unit combines a mechanical on/off switch with built-in thermal overload and magnetic short-circuit protection in a compact form factor. Rated for 4–6.3 A adjustable current range, it is suitable for motors with full load currents within this band and supports IEC-standard voltage ratings.
Key Features
- Adjustable thermal overload release: 4–6.3 A range for flexible motor protection
- 3-pole (3PH) configuration for three-phase motor control
- Integrated magnetic trip for instantaneous short-circuit protection
- IEC-rated design with UL/CSA certifications for North American and international applications
- Manual operation—no coil or external control power required
- DIN rail mounting for space-efficient panel integration
Technical Specifications
| Part Number | 140-MN-0630 |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Product Type | Manual Motor Starter / Motor Protector |
| Poles | 3 (Three-Phase) |
| Current Adjustment Range | 4–6.3 A |
| Mounting | DIN Rail |
| Protection Type | Thermal Overload + Magnetic Short-Circuit |
| Voltage Ratings (Reference) | 200, 230, 400, 415, 460, 575 VAC (varies by series) |
| Weight | 0.65 lbs (0.30 kg) |
| Series | Series C (and earlier revisions available) |
| Control Method | Manual (Push-button On/Off) |
| Certification | UL, CSA, IEC, CEBEC |
Typical Applications
The 140-MN-0630 is commonly used in:
- Small to medium three-phase motor installations (3–15 HP at various voltages)
- Pump and fan motor protection in HVAC and process systems
- General industrial machinery control where simple on/off switching is required
- OEM equipment retrofits and maintenance replacements
- Panel-mount or enclosure-based motor control solutions
Compatibility & Replacements
The 140-MN-0630 is part of the Allen-Bradley Bulletin 140 family of manual motor starters and protectors. When selecting a replacement or alternative:
- 140-MN-0400: 3–4 A range (lower current option)
- 140-MN-1000: 10–16 A range (higher current option)
- Verify motor full-load current and service factor before substitution to ensure correct protection coordination
- All units in the 140-MN series use standard IEC mounting and terminal configurations for compatibility with auxiliary contacts and operator modules
