1240-12V DC 12V 1.7A 20.6W 1kg Holding Solenoid for Electric Door Lock

The 1240-12V DC holding solenoid is a robust electromagnetic locking mechanism designed specifically for electric door lock systems requiring reliable access control. Security professionals, building automation technicians, and systems integrators use this solenoid to implement fail-safe or fail-secure door locking solutions in commercial and residential facilities. This product solves the critical problem of providing controlled electromagnetic holding force while maintaining low power consumption and compact form factor for seamless integration into existing door frame assemblies.

Product Overview

This holding solenoid operates on the principle of electromagnetic induction, where DC voltage applied to the internal copper coil generates a magnetic field that pulls an armature or plunger mechanism. The 1240 model delivers a holding force of 1 kilogram, sufficient for standard single-door installations in office buildings, server rooms, laboratories, and residential security systems. At 12V DC with 1.7A current draw and 20.6W power consumption, this solenoid offers an optimal balance between holding strength and energy efficiency, making it ideal for systems powered by standard 12V power supplies or battery backup configurations.

The solenoid's design incorporates a continuous duty rating, allowing it to maintain holding force indefinitely without thermal degradation. The 1kg holding capacity translates to approximately 9.81 Newtons of force, sufficient to secure lightweight to medium-weight door assemblies against unauthorized entry. This model is engineered for direct integration with electronic access control systems, magnetic locks, and smart door lock controllers that operate within the 12V DC standard. The compact weight of 1 kilogram ensures minimal structural load on door frames while the electromagnetic design eliminates mechanical wear points associated with traditional mechanical locks.

Key Specifications

Specification	Details
Product Type	DC Holding Solenoid for Electric Door Lock
Model Number	1240-12V
Operating Voltage	12V DC
Current Draw	1.7A
Power Consumption	20.6W
Holding Force	1kg (9.81N)
Weight	1kg
Duty Cycle	Continuous
Coil Type	Copper wound electromagnetic coil
Installation Type	Surface mount or embedded in door frame
Origin	Original/Authentic
Warranty	7 days on manufacturing defects
Shipping	1-5 days from Bengaluru
Delivery	7-8 days across India
Support	24/7 via Email and WhatsApp

Key Features

• 12V DC rated solenoid with 1.7A current specification for compatibility with standard access control power supplies and UPS backup systems
• 1kg holding force capacity delivers 9.81 Newtons of electromagnetic pull sufficient for single-door security applications in commercial and residential settings
• 20.6W power consumption enables efficient operation on battery backup systems and reduces heat generation in continuous duty applications
• Continuous duty rating allows indefinite energization without thermal shutdown or coil degradation, ideal for fail-secure door lock implementations
• Compact 1kg weight minimizes structural stress on door frames and mounting hardware while maintaining robust electromagnetic performance
• Copper wound coil construction provides superior electrical conductivity and thermal dissipation compared to aluminum alternatives

Applications and Use Cases

• Commercial office building access control where electromagnetic door locks provide fail-secure entry points requiring manual override during power loss scenarios
• Data center and server room security implementations utilizing solenoid-based magnetic locks integrated with biometric and card reader systems
• Laboratory and pharmaceutical facility door locking where controlled access and audit trail logging demand reliable electromagnetic holding mechanisms
• Residential apartment complex security systems where solenoid locks provide centralized access control for main entry doors and restricted areas
• Hospital and healthcare facility door locking for medication storage, equipment rooms, and restricted access areas requiring HIPAA-compliant access logging
• Parking garage and vehicle access gate systems where solenoid mechanisms control barrier arm activation and sliding gate operations

How to Use

Installation of the 1240-12V holding solenoid requires proper integration with your door lock assembly and 12V DC power supply. Begin by identifying the mounting location on your door frame, ensuring the solenoid aligns with the strike plate or latch mechanism. Connect the positive and negative terminals to your 12V DC power source, typically a dedicated power supply rated for at least 2A capacity to accommodate the 1.7A solenoid draw plus controller overhead. If integrating with an access control system, connect the solenoid through a relay or electronic door lock controller that handles the switching logic and provides power management.

For fail-secure installations, the solenoid should remain energized during normal operation and de-energize during power loss to lock the door. For fail-safe installations, reverse the logic so the door unlocks when power is lost. Install a bypass diode across the solenoid coil terminals to protect your controller from back-EMF voltage spikes when the solenoid de-energizes. Test the holding force by applying 50-70% of the rated load to verify the solenoid maintains secure engagement. Ensure adequate ventilation around the solenoid during continuous duty operation, as the 20.6W power dissipation generates moderate heat over extended periods.

Frequently Asked Questions

What is the difference between holding solenoid and pull solenoid for door locks?

A holding solenoid maintains continuous electromagnetic force to keep a door locked while energized, ideal for fail-secure applications. A pull solenoid provides momentary force to trigger a latch mechanism. The 1240-12V is a holding type designed for continuous duty, meaning it can remain energized indefinitely without thermal damage, making it suitable for always-locked security doors.

Can I use this solenoid with a 24V DC power supply instead of 12V?

No, applying 24V DC to a 12V rated solenoid will cause excessive current draw, coil overheating, and permanent damage within minutes. The copper windings are designed for 12V operation only. If your system uses 24V, you must use a DC-DC converter to step down voltage to 12V, or select a 24V rated solenoid model instead.

How do I calculate if 1kg holding force is sufficient for my door?

The 1kg holding force equals 9.81 Newtons and is suitable for lightweight to medium-weight doors up to approximately 40-50kg in still conditions. For heavier doors or doors exposed to wind forces, calculate the force required and select a higher capacity solenoid. Consider that the force must overcome friction in the lock mechanism plus any external forces attempting to open the door.

Is this solenoid suitable for outdoor installation?

This solenoid is designed for indoor use. For outdoor installation, you need an IP67-rated enclosure to protect against moisture, dust, and temperature fluctuations. Exposure to rain, humidity, or salt air will corrode the copper coil and cause premature failure. Always house outdoor solenoid installations in weatherproof enclosures with proper drainage.

What happens if the solenoid loses power while the door is locked?

In a fail-secure configuration, loss of power causes the door to remain locked, providing security during power outages. In a fail-safe configuration, power loss unlocks the door for emergency egress. The 1240-12V itself is passive and does not store energy, so it will immediately de-energize when power is lost. Your system design determines whether this results in locked or unlocked state.

When will I receive my order?

Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.

What is your return and warranty policy?

We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.

Why Buy from The Engineer Store

• Genuine Products: Sourced directly from authorized distributors with authentication
• Expert Team: Our technical team validates every product before listing
• Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
• Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
• Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
• Technical Support: 24/7 expert guidance via email and WhatsApp
• Returns: 7-day return policy on manufacturing defects only

Buy 1240-12V DC 12V 1.7A 20.6W 1kg Holding Solenoid for Electric Door Lock Online in India

Purchase the 1240-12V DC 12V 1.7A 20.6W 1kg Holding Solenoid for Electric Door Lock online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on 1240-12V DC 12V 1.7A 20.6W 1kg Holding Solenoid for Electric Door Lock with fast shipping and expert support.

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