The Fire Rated Door Stainless Steel Power Transfer Device is positioned as a reliable interface component for modern fire-rated door systems that require secure and continuous power transmission. Manufactured from SUS304 stainless steel, it ensures high strength, corrosion resistance, and long-term durability in demanding environments. Designed to provide uninterrupted transfer of electrical wiring between the door leaf and frame, it supports the stable operation of electric locks, access control systems, and door monitoring devices while remaining completely concealed when the door is closed. Suitable for fire-rated wooden and hollow metal doors, this power transfer device is ideal for commercial buildings, offices, hospitals, hotels, and other regulated facilities where fire safety compliance, clean installation, and dependable electrical performance are essential.
Technical Specifications
Model Number
DDTD002
Brand
D&D HARDWARE
Material
SUS304 Stainless Steel (18%Cr,8%Ni); SUS316 Optional for Better Corrosion Resistance
Finish
Satin Stainless Steel (320-grit Brushed); Anti-fingerprint, Easy to Clean
Type
Concealed Power Transfer Device, Fully Hidden When Door Closed
Application Compatibility
Wood/Hollow Metal Fire-Rated Doors, Complies with 30-120min Fire Safety Standards
Product Images and Videos
Product Features & Advantages
Concealed Design: Maintains Fire Door Aesthetics & Integrity: The device is fully hidden when the door is closed, preserving the clean, unobtrusive look of fire-rated doors. Unlike exposed wiring or external power transfer units, this concealed design ensures the door’s surface remains smooth—critical for compliance with fire safety regulations (which require intact door hardware for proper fire sealing). It eliminates visual clutter, making it ideal for high-end spaces like luxury hotels and corporate offices.
SUS304 Stainless Steel: Fire & Corrosion Resistance: Constructed from food-grade SUS304 stainless steel, the device withstands high temperatures (up to 800°C for short durations, per fire testing) and resists corrosion from environmental moisture or cleaning agents. This material choice ensures durability in humid environments (like bathrooms in apartments) and heavy-use areas (office building corridors), outlasting galvanized or plated alternatives by 8–10 years.
Seamless Power Transmission for Electronic Hardware: Enables reliable power transfer to smart locks, access control readers, and door viewers without interrupting the door’s fire-rated performance. This is essential for integrated security systems in hospitals, banks, and military facilities, where both fire safety and access control are critical. The device supports 12–24V DC systems, compatible with most commercial door locksets and surveillance devices.
Compatibility with Wood & Hollow Metal Fire Doors: Specifically engineered for wood and hollow metal fire-rated doors (the most common materials in commercial and residential fire systems), ensuring a perfect fit and secure power transfer. This versatility eliminates the need for custom modifications, simplifying installation in retrofits or new constructions—saving contractors time and reducing project costs.
Application Scenarios
Hospitality (Hotels, Resorts): In hotels and resorts, the DDTD002 is commonly installed on fire-rated guest room doors to supply power to smart locks, electronic keyless entry systems, and door viewers. By transferring power discreetly through the door leaf, it allows hoteliers to upgrade guest security without compromising interior design. The concealed design supports luxury aesthetics, while the SUS304 stainless steel body withstands frequent cleaning with disinfectants, ensuring long-term reliability in daily hotel operations. At the same time, full fire-rated compliance helps properties meet strict safety regulations and protect guests during emergencies.
Commercial Offices & High-Rises: In office buildings and high-rise commercial projects, the device is used to power access control readers, electric locks, and panic exit devices installed on fire-rated entry doors. The DDTD002 ensures stable power transmission while working seamlessly with door closers to maintain proper door closing and latching in fire conditions. Its hidden installation aligns with modern office design concepts, avoiding exposed cables or surface-mounted components and supporting clean, professional interiors.
High-Security Spaces (Banks, Data Centers): In high-security environments such as banks, data centers, and controlled-access facilities, the DDTD002 supports continuous power supply to biometric locksets, surveillance door viewers, and other security-critical electronic devices installed on fire-rated doors. Its reliable power transmission ensures uninterrupted operation of 24/7 security systems, while fire-rated performance helps protect assets and infrastructure in emergency situations. The robust design minimizes failure risks in mission-critical applications.
Certifications and Compliance
International Fire & Safety Certifications: CE (EN 1634-1 for fire-rated door hardware), UL 10C (fire door assembly compliance), and BHMA A156.13 (power transfer device performance)—critical for global fire safety regulations.
Material & Performance Standards: - SUS304 stainless steel complies with ASTM A240 for corrosion resistance in fire and humid environments. - Electrical components meet IEC 60950-1 for low-voltage equipment safety. - Fire testing: Passes 30–120-minute fire resistance tests per UL 10C and EN 1634-1.
ISO 9001 Quality Management: Manufactured under ISO 9001:2015-certified processes, with 100% electrical and fire safety testing for each batch.
SGS Factory Audited: Produced in an SGS-verified facility (200,000 units/month capacity) with traceable material sourcing and ethical manufacturing—meeting global supply chain standards.
Customization Options
D&D offers tailored customization for DDTD002 to meet project-specific requirements:
Material Upgrades: SUS316 stainless steel (for coastal or high-corrosion environments like marine resorts); anti-microbial coated stainless steel (for healthcare facilities). MOQ: 500 units.
Finish Customization: Match RAL/Pantone colors for brand-specific projects (e.g., hotel chains); brushed or polished finish variations to align with interior design. MOQ: 300 units.
Integration Enhancements: Pre-wired connectors for quick integration with D&D’s door hinges (like DDTD001) or panic exit devices; custom wire lengths for oversized doors. MOQ: 1000 units.
OEM/ODM Services: Private-label devices with brand logos; custom installation manuals (multilingual); serialized batches for traceability (required for large-scale projects). Offer hardware bundles (power transfer device + door locks + door closers).
Production Process & Quality Control
D&D’s production process ensures precision and fire safety compliance:
SUS304 Stainless Steel Sourcing & Testing: Select slabs from SGS-verified mills; test via X-ray fluorescence (XRF) to confirm chromium/nickel content (18%/8% minimum). Reject batches with impurities >0.01% to ensure fire and corrosion resistance.
Precision Machining & Concealment Design: CNC machines shape the device to exact dimensions for flush, concealed installation. Edges are deburred to prevent sharp protrusions that could compromise fire seals.
Electrical Component Integration & Sealing: Tinned copper wires (22 AWG) with gold-plated connectors (for low-resistance transmission) are integrated into the device. Seals are applied to ensure fire-rated integrity (tested to prevent smoke/fire penetration).
Surface Finishing & Fire Testing: Devices undergo 320-grit satin brushing followed by passivation to enhance corrosion resistance. Random samples undergo fire testing (30–120 minutes) to verify compliance with UL/EN standards.
Final Quality Testing (100% Batch Inspection): - Electrical: Voltage drop test (<0.5V) and insulation resistance test (≥100MΩ). - Mechanical: Torque test on mounting screws and pull-out strength test. - Fire: Visual inspection for seal integrity after fire testing simulation.
Packaging: Qualified devices are packed in fire-resistant labeled boxes with installation hardware and compliance certificates. Bulk orders include moisture-absorbing desiccants for shipping stability.
Step-by-Step Installation Guide
Pre-Installation Preparation & Safety: - Ensure the door is a compatible wood or hollow metal fire-rated door (verify fire rating label). - Gather tools: Drill (3mm stainless steel bit), torque wrench, level, wire stripper, and D&D’s door lockset (if integrating access control). - Shut off power to the door’s electrical circuit (use a voltage tester to confirm safety).
Mark Mounting Positions (Concealment-Critical): - Identify the location on the door edge and jamb where the device will be concealed when the door is closed. - Use a level to mark precise alignment points, ensuring the device sits flush and hidden once installed.
Mount the Power Transfer Device: - Attach the device to the door edge and jamb using provided stainless steel screws, tightening to 12–15 ft-lbs torque (ensure flush fit for concealment). - Connect wires from the device to the building’s low-voltage circuit (follow color coding: typically red/black for power).
Connect to Door-Mounted Electronic Hardware: - Strip 10mm of insulation from wires leading to smart locks, door viewers, or other devices. - Securely connect wires, ensuring no exposed conductors (use wire nuts or crimp connectors for reliability).
Test Functionality & Fire Compliance: - Restore power and test connected devices: Verify door lock activates, and power transmission is stable. - Perform a fire door closure test: Ensure the door closes fully and the device remains concealed without impeding the door’s seal (check for gaps that could compromise fire rating).
Final Calibration with Door Hardware: - Adjust door closers to ensure smooth closure without straining the power transfer device or wires. - Test integration with panic exit devices (if applicable): Confirm emergency egress functions while power transmission remains active.
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