The BCH MC305ANA3A is a Citation-M thermal overload relay designed for reliable motor overload protection in low-voltage motor control and starter applications. This model provides an adjustable overload protection range of 0.195–0.31 A and is designed for direct mounting with compatible BCH contactors. BCH lists the MC305ANA3A within its Citation overload-relay range, which extends from 0.195 A to 600 A.
The relay incorporates built-in single-phasing protection, helping protect suitable three-phase motors against damaging conditions associated with loss of one phase. It is also ambient-temperature compensated, supporting more consistent thermal protection under varying surrounding temperatures.
The 0.195–0.31 A adjustable range makes the MC305ANA3A suitable for appropriately rated small-current motor applications where precise overload protection is required. The relay should be selected according to the motor full-load current and coordinated with the contactor and complete motor-starter arrangement.
The relay includes a test button for checking the tripping mechanism and supports field-convertible automatic/manual reset, giving maintenance personnel flexibility when configuring the motor protection scheme. BCH also specifies a snap-on protection cover and a mechanism designed to provide close protection to the motor.
The direct-mounting design allows the overload relay to be mounted directly with compatible contactors, helping create a compact motor starter assembly. BCH also specifies that its Citation overload relays support contactor mounting and separate mounting, and are suitable for use with other compatible contactors of the specified width.
BCH MC305ANA3A Citation-M overload relay
Adjustable current range: 0.195–0.31 A
Direct mounting design
Built-in single-phasing protection
Ambient temperature compensation
Test button for checking the tripping mechanism
Field-convertible Auto/Manual reset
Snap-on protection cover
Special mechanism designed for close motor protection
Suitable for contactor mounting
Can also be used with suitable individual mounting arrangements
Designed for motor starter applications
BCH Citation overload-relay technology
Suitable for low-current motor protection
The BCH MC305ANA3A 0.195–0.31A thermal overload relay can be considered for:
Small motor protection
Motor starter assemblies
Contactor-based motor starters
Industrial control panels
Automation control panels
Machine control systems
Pump control systems
Fan and blower applications
Small conveyor systems
OEM machinery
Panel-builder motor control assemblies
Industrial motor protection
Three-phase motor applications
Low-current motor circuits
Electrical control systems
The BCH MC305ANA3A provides adjustable thermal overload protection for small-current motors within its 0.195–0.31 A setting range. Correct adjustment according to the motor's full-load current helps provide appropriate protection against sustained overload conditions.
The built-in single-phasing protection is an important feature for three-phase motor applications because phase loss can result in abnormal motor current and overheating. The relay is designed to respond to applicable single-phasing conditions as part of the motor protection arrangement.
The ambient temperature compensation helps maintain more consistent thermal protection when the surrounding panel temperature changes. This makes the relay suitable for industrial control panels where ambient conditions may vary.
The test button provides a convenient method for checking the tripping mechanism during commissioning or maintenance. This can help maintenance personnel verify correct relay operation without relying only on an actual motor-overload event.
The Auto/Manual reset conversion provides flexibility when configuring the motor control system. Automatic reset can be useful in selected applications, while manual reset can support controlled equipment restart after an overload trip.
The direct-mounting configuration allows the overload relay to be integrated with a compatible contactor, providing a compact motor starter arrangement. This can help panel builders and OEMs reduce wiring complexity and maintain a clean control-panel layout.
The snap-on protection cover helps protect the relay's adjustment and operating area. The dedicated mechanism is designed for close motor protection, supporting dependable operation when the relay is correctly selected and adjusted.
The Citation-M range covers a broad current spectrum, with BCH listing products from 0.195 A through 600 A, making the series suitable for a wide variety of motor-control applications.
The BCH MC305ANA3A 0.195–0.31A thermal overload relay can be considered for suitable projects across Faridabad, Delhi NCR, Noida, Gurgaon/Gurugram, Ghaziabad, Punjab, Mumbai, Pune, Ahmedabad, Hyderabad, Bengaluru/Bangalore, Chennai, Kolkata, Jaipur, Chandigarh, Ludhiana and other major industrial locations across India.
Always verify the motor full-load current, contactor compatibility, overload setting, mounting arrangement and complete motor-starter design before installation.
SB Smart supplies BCH industrial electrical and motor-control products for OEMs, panel builders, electrical contractors, automation integrators, machine manufacturers and industrial maintenance teams across India.
The BCH MC305ANA3A Citation-M thermal overload relay is suitable for customers looking for compact motor overload protection with a 0.195–0.31 A adjustable range, direct mounting, built-in single-phasing protection and ambient temperature compensation.
SB Smart supports BCH product sourcing across Faridabad, Delhi NCR, Noida, Gurgaon/Gurugram, Mumbai, Pune, Ahmedabad, Hyderabad, Bengaluru/Bangalore, Chennai, Kolkata, Chandigarh, Ludhiana and other major Indian industrial markets.
1. What is BCH MC305ANA3A?
It is a BCH Citation-M thermal overload relay for motor protection with a 0.195–0.31 A adjustable overload range.
2. Is MC305ANA3A suitable for direct mounting?
Yes. It is listed by BCH under Citation overload relays for direct mounting.
3. What is the current adjustment range?
The relay range is 0.195–0.31 A.
4. Does it provide single-phasing protection?
Yes. BCH specifies built-in single-phasing protection for the Citation overload-relay range.
5. Is the relay temperature compensated?
Yes. It is specified as ambient temperature compensated.
6. Does it have a test function?
Yes. The relay includes a test button for checking the tripping mechanism.
7. Can the reset mode be changed?
Yes. BCH specifies a field-convertible Auto/Manual reset arrangement.
8. Where can MC305ANA3A be used?
It can be considered for suitable small motor starters, industrial control panels, automation systems, machinery, pumps, fans, OEM equipment and other compatible motor-control applications.
| Parameter | Details |
|---|---|
| Brand | BCH Electric Limited |
| Model | MC305ANA3A |
| Product Type | Thermal Overload Relay |
| Series | Citation |
| Mounting Type | Direct Mounting |
| Relay Setting Range | 0.195–0.31 A |
| Protection | Overload, Single Phasing, Phase Imbalance |
| Reset Mode | Manual / Automatic (Selectable) |
| Temperature Compensation | Yes |
| Trip Class | Class 10 |
| Standards | IEC 60947-4-1 / IS 13947-4-1 |
| Applications | Motor Starters, MCC Panels, Control Panels, Pumps, Compressors, Industrial Automation, OEM Machinery |
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