Introduction to the BMC7 Modular Contactor Series

The BMC7 modular contactor series represents a versatile solution for electrical control applications, designed to meet the demands of modern building automation systems and electrical installations. These contactors offer reliable performance in switching and controlling various electrical loads, including lighting systems, heating equipment, ventilation units, and pumps in residential and commercial buildings.

Manufactured in accordance with international standards IEC/EN61095 and IEC60947-4-1, the BMC7 modular contactors are specifically engineered for integration into Din rail systems, making them an ideal choice for installation in dedicated electrical panels. Their modular design ensures easy installation and seamless integration with other Din rail products, providing a comprehensive solution for electrical control requirements.

Key Applications and Capabilities

The BMC7 modular contactors excel in applications requiring precise control of both resistive and inductive loads. They are primarily designed for:

Lighting Control Systems: Efficient management of lighting circuits in residential and commercial buildings
Heating Systems: Reliable control of heating elements and electric heaters
Ventilation Equipment: Precise operation of ventilation fans and air handling units
Pump Control: Dependable switching for water pumps and circulation systems
Household Appliances: Safe operation of various household electrical devices

These contactors are specifically designed for AC 50Hz (or 60Hz) applications with rated working voltages up to 400V and rated currents up to 63A. The BMC7 series is particularly effective for controlling low-inductance loads in household appliances and similar applications, while also being capable of controlling household motor loads with appropriate power reduction.

Technical Specifications and Performance Parameters

Power Circuit Specifications

The BMC7 modular contactors feature robust electrical characteristics that ensure reliable performance in various applications:

Rated Voltage (Ue):
- 1P, 2P models: 250V AC
- 3P, 4P models: 400V AC
Frequency: 50/60Hz
Insulation Voltage (Ui): 500V AC
Rated Impulse Withstand Voltage (Uimp): 2.5kV (4kV for 12/24/48VAC versions)
Pollution Degree: 2
Tropicalization: Treatment 2 (relative humidity 95% at 55°C)
ELSV Compliance: Extra Low Safety Voltage for 12/24/48VAC versions

Operational Parameters

The BMC7 contactors are designed for reliable long-term operation:

Electrical Endurance: 100,000 cycles
Mechanical Endurance: 1,000,000 cycles
Maximum Switching Operations: 100 operations per day
Operating Temperature Range: -5°C to +60°C
Storage Temperature Range: -40°C to +70°C
Degree of Protection:
- Device only: IP20
- Device in modular enclosure: IP40
Mounting Position: ±30° vertical, clip-on DIN rail 35mm

BMC7 Series Model Range

The BMC7 series offers a comprehensive range of models with varying configurations to suit different application requirements. The model designation follows a logical pattern (e.g., BMC7-25/20 230V indicates a 25A contactor with 2NO contacts and 230V AC coil voltage).

1-Pole Configurations (1P, 1 module)

Model	Ie Rating AC-1	Ie Rating AC-3	Ie Rating AC-7a	Ie Rating AC-7b	Available Coil Voltages
BMC7-16/10	16A	6A	16A	7A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-20/10	20A	7A	20A	9A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-25/10	25A	9A	25A	9A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-32/10	32A	12A	32A	12A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-16/01	16A	6A	16A	7A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-20/01	20A	7A	20A	9A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-25/01	25A	9A	25A	9A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-32/01	32A	12A	32A	12A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC

1-Pole Configurations (1P, 2 modules)

Model	Ie Rating AC-1	Ie Rating AC-3	Ie Rating AC-7a	Ie Rating AC-7b	Available Coil Voltages
BMC7-40/10	40A	18A	40A	18A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-63/10	63A	25A	63A	25A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-40/01	40A	18A	40A	18A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-63/01	63A	25A	63A	25A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC

2-Pole Configurations (2P, 1 module)

Model	Ie Rating AC-1	Ie Rating AC-3	Ie Rating AC-7a	Ie Rating AC-7b	Available Coil Voltages
BMC7-16/20	16A	6A	16A	7A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-20/20	20A	7A	20A	9A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-25/20	25A	9A	25A	9A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-32/20	32A	12A	32A	12A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-16/11	16A	6A	16A	7A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-20/11	20A	7A	20A	9A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-25/11	25A	9A	25A	9A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-32/11	32A	12A	32A	12A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-16/02	16A	6A	16A	7A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-20/02	20A	7A	20A	9A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-25/02	25A	9A	25A	9A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-32/02	32A	12A	32A	12A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC

2-Pole Configurations (2P, 2 modules)

Model	Ie Rating AC-1	Ie Rating AC-3	Ie Rating AC-7a	Ie Rating AC-7b	Available Coil Voltages
BMC7-40/20	40A	18A	40A	18A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-63/20	63A	25A	63A	25A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-40/11	40A	18A	40A	18A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-63/11	63A	25A	63A	25A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-40/02	40A	18A	40A	18A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-63/02	63A	25A	63A	25A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC

3-Pole Configurations (3P, 2 modules)

Model	Ie Rating AC-1	Ie Rating AC-3	Ie Rating AC-7a	Ie Rating AC-7b	Available Coil Voltages
BMC7-16/30	16A	6A	16A	7A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-20/30	20A	7A	20A	9A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-25/30	25A	9A	25A	9A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-32/30	32A	12A	32A	12A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-16/03	16A	6A	16A	7A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-20/03	20A	7A	20A	9A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-25/03	25A	9A	25A	9A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-32/03	32A	12A	32A	12A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC

3-Pole Configurations (3P, 3 modules)

Model	Ie Rating AC-1	Ie Rating AC-3	Ie Rating AC-7a	Ie Rating AC-7b	Available Coil Voltages
BMC7-40/30	40A	18A	40A	18A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-63/30	63A	25A	63A	25A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-40/03	40A	18A	40A	18A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-63/03	63A	25A	63A	25A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC

4-Pole Configurations (4P, 2 modules)

Model	Ie Rating AC-1	Ie Rating AC-3	Ie Rating AC-7a	Ie Rating AC-7b	Available Coil Voltages
BMC7-16/40	16A	6A	16A	7A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-20/40	20A	7A	20A	9A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-25/40	25A	9A	25A	9A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-32/40	32A	12A	32A	12A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-16/04	16A	6A	16A	7A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-20/04	20A	7A	20A	9A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-25/04	25A	9A	25A	9A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-32/04	32A	12A	32A	12A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-16/22	16A	6A	16A	7A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-20/22	20A	7A	20A	9A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-25/22	25A	9A	25A	9A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-32/22	32A	12A	32A	12A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-16/31	16A	6A	16A	7A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-20/31	20A	7A	20A	9A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-25/31	25A	9A	25A	9A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-32/31	32A	12A	32A	12A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC

4-Pole Configurations (4P, 3 modules)

Model	Ie Rating AC-1	Ie Rating AC-3	Ie Rating AC-7a	Ie Rating AC-7b	Available Coil Voltages
BMC7-40/40	40A	18A	40A	18A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-63/40	63A	25A	63A	25A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-40/04	40A	18A	40A	18A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-63/04	63A	25A	63A	25A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-40/22	40A	18A	40A	18A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-63/22	63A	25A	63A	25A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-40/31	40A	18A	40A	18A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC
BMC7-63/31	63A	25A	63A	25A	12V, 24V AC/DC, 48V AC/DC, 110V AC/DC, 230V AC/DC

Understanding BMC7 Model Designations

The BMC7 series follows a systematic naming convention that makes it easy to identify the specific characteristics of each model:

BMC7-XX/YZ [Voltage]

BMC7: Base series designation
XX: Current rating (16A, 20A, 25A, 32A, 40A, or 63A)
Y: Number of normally open contacts (0-4)
Z: Number of normally closed contacts (0-4)
[Voltage]: Coil voltage (12V, 24V, 48V, 110V, or 230V AC/DC)

For example, BMC7-25/20 230V indicates a 25A contactor with 2 normally open contacts (2NO) and 0 normally closed contacts, with a 230V AC coil voltage.

Power Consumption Specifications

The BMC7 contactors are designed for energy efficiency, with specific power consumption characteristics based on the model and rating:

Poles	Ie Rating (A)	Uc (VAC) (50Hz)	Hold On Power (W)	Pull In Power (VA)	Max Power
1P	16	230	2.0W	2.1VA	6.0VA
1P	20	230	2.0W	2.1VA	6.0VA
1P	25	230	2.0W	2.1VA	6.0VA
1P	32	230	2.0W	2.1VA	6.0VA
1P	40	230	2.0W	2.3VA	6.0VA
1P	63	230	2.0W	2.3VA	6.0VA
2P	16	230	2.0W	2.1VA	6.0VA
2P	20	230	2.0W	2.1VA	6.0VA
2P	25	230	2.0W	2.1VA	6.0VA
2P	32	230	2.0W	2.1VA	6.0VA
2P	40	230	2.0W	2.3VA	6.0VA
2P	63	230	2.0W	2.3VA	6.0VA
3P	16	230	2.0W	2.3VA	6.0VA
3P	20	230	2.0W	2.3VA	6.0VA
3P	25	230	2.0W	2.3VA	6.0VA
3P	32	230	2.0W	2.3VA	6.0VA
3P	40	230	5.5W	2.3VA	6.0VA
3P	63	230	5.5W	2.3VA	6.0VA
4P	16	230	2.0W	2.1VA	6.0VA
4P	20	230	2.0W	2.1VA	6.0VA
4P	25	230	2.0W	2.1VA	6.0VA
4P	32	230	2.0W	2.1VA	6.0VA
4P	40	230	5.5W	2.3VA	6.0VA
4P	63	230	5.5W	2.3VA	6.0VA

Installation and Connection Details

The BMC7 contactors are designed for easy installation and connection:

Mounting Options

Clip-on mounting on 35mm DIN rail
Vertical mounting position (±30°)
When mounting in enclosures with interior temperatures between 50°C and 60°C, spacing pieces are recommended between contactors

Connection Parameters

Type	Rating	Length	Tripping Circuit	Tightening Torque	Copper Cables (Rigid)	Flexible or Ferrule
BMC7	16-63A	9mm	–	0.8N.m	1.5-6mm²	1.5-2.5mm²
BMC7	16-32A	9mm	PZ1:4mm	0.8N.m	2×1.5mm²	2×1.5mm²
BMC7	40A-63A	14mm	PZ2:6mm	3.5N.m	6-25mm²	6-16mm²
BMC7	16-63A	9mm	PZ1:4mm	0.8N.m	1-4mm²	1.5-2.5mm²
BMC7	16-63A	–	–	–	2×2.5mm²	2×2.5mm²

Auxiliary Contacts

The BMC7 series also offers auxiliary contact options for status indication:

Model	Circuit	Rated Current	AC-12 (240V)	AC-15 (230V)	DC-13 (130V DC)
BMC7-AUC11	1NO+1NC	5A	5A	2A	1A
BMC7-AUC20	2NO	5A	5A	2A	1A

BMC-7 Dimension

BMC7 Modular Contactor Dimensions

Accessories and Additional Components

To enhance installation flexibility and functionality, the BMC7 series offers several accessories:

Spacing Pieces

3mm Spacing Piece: For reducing temperature rise when mounting devices side by side
9mm Spacing Piece: Recommended for separating electronic equipment from electromechanical equipment

Product Dimensions

The BMC7 contactors are designed with compact dimensions to maximize space efficiency in electrical panels:

BMC7-16/20/25/32 (1P/2P): 36±0.4mm width, 85.5±0.5mm height, 68±0.4mm depth
BMC7-16/20/25/32 (3P/4P): 54±0.8mm width, 85.5±0.5mm height, 68±0.4mm depth
BMC7-40/63 (1P/2P): 36±0.4mm width, 90±0.5mm height, 68±0.4mm depth
BMC7-40/63 (3P/4P): 54±0.8mm width, 90±0.5mm height, 68±0.4mm depth

Understanding Load Classifications

The BMC7 contactors are rated for various load types according to international standards:

AC-1: Non-inductive or slightly inductive loads (resistance heating)
AC-3: Squirrel-cage motors: starting, switching off during running
AC-7a: Slightly inductive loads in household appliances
AC-7b: Motor loads for household applications

Installation Guidelines and Best Practices

For optimal performance and longevity of the BMC7 contactors, consider the following installation guidelines:

Temperature Management:
- Use spacing pieces between contactors when mounting in enclosures with high internal temperatures
- Maintain proper ventilation in the electrical panel
Mounting Position:
- Ensure vertical mounting within the ±30° tolerance
- Secure firmly on 35mm DIN rail
Wiring Recommendations:
- Use copper conductors of the specified cross-sectional area
- Apply the correct tightening torque to ensure proper connections
- Separate control wiring from power wiring when possible
Load Protection:
- Implement appropriate overload protection for the controlled loads
- Consider the specific load type (AC-1, AC-3, AC-7a, AC-7b) when selecting the contactor rating
Coil Voltage Selection:
- Choose the appropriate coil voltage based on the control circuit requirements
- Ensure stable control voltage supply to prevent contactor chatter

Conclusion

The BMC7 modular contactor series offers a comprehensive solution for various electrical control applications in residential and commercial buildings. With its wide range of models, current ratings, and pole configurations, the BMC7 series provides flexibility and reliability for diverse switching requirements.

Engineered to international standards and featuring robust electrical characteristics, these contactors ensure long-term performance in controlling lighting, heating, ventilation, and pump loads. Their compact design, Din rail compatibility, and easy integration with other modular devices make them an ideal choice for modern electrical installations.

The complete BMC7 range, from the compact 16A models to the powerful 63A versions, delivers consistent performance across

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