Introduction to the YEND74 Grade 3 Surface Magnetic Door Contact
YEND74 Grade 3 Surface Magnetic Door Contact
The YEND74 is a robust, surface-mounted magnetic door contact designed for professional and advanced DIY wired intruder alarm systems. Built to the Grade 3 standard indicated by the manufacturer (EN50131-2-6), it combines magnetic interference detection, a TACT microswitch tamper, and selectable end-of-line (EOL) and alarm resistor options to ensure flexible compatibility with most mainstream control panels. Compact and practical, the unit is supplied with spacers for 906 and awkward double-door installations, making it a versatile choice where reliability and compliance matter.
Key features at a glance
- Grade 3 surface magnetic contact with magnetic interference detection
- Selectable EOL and alarm resistors via PCB jumpers for panel compatibility
- TACT microswitch tamper with dedicated tamper terminals
- Supplied spacers permit installation at 906 or on double doors
- Rhodium-plated reed and ferrite magnet for dependable switching
- Compact white ABS housing that suits most interiors
Detailed specifications and benefits
The YEND74is engineered to meet the practical demands of modern wired intrusion systems. Below are its principal specifications and the benefits they deliver to installers, integrators and end users.
- Model:YEND74 (also available in brown YEND74B and black YEND74BK)
- Contact type:Rhodium-plated reed switch (normally closed) with magnetic interference detection. Benefit: rhodium plating improves contact longevity and resistance to corrosion for consistent performance over years of service.
- Tamper:TACT microswitch tamper with two tamper terminals. Benefit: physical tamper detection offers a simple, fail-safe method to detect product removal or forced access attempts.
- Operating gap:Make ~15 mm / Break ~25 mm (approx.). Benefit: a forgiving operating gap simplifies alignment during installation and reduces nuisance faults caused by slight misalignment.
- Mounting:Surface mount with two spacers included for 906 or double-door setups. Benefit: versatile mounting options reduce the need for special fittings or door/frame modifications.
- Alarm resistor options:1 ka9, 4.7 ka9, 5.6 ka9, 6.8 ka9, 8.2 ka9 (selectable).
- EOL/supervision resistor options:1 ka9, 2.2 ka9, 4.7 ka9, 5.6 ka9, 8.2 ka9 (selectable).
Benefit: selectable resistors via PCB jumpers let you match the contact to the specific supervision scheme of most control panels (Honeywell/Ademco, Texecom, Pyronix, DSC, RISCO, Guardall, Inner Range, etc.). This eliminates the need for external resistor wiring or swapping parts on site.
- Current rating:500 mA max.
- Voltage rating:1 1V DC, 1 1 1 1 125 V AC
- Wiring/terminals:4-terminal block plus tamper terminals; supports standard 4-wire and 2-wire supervised installations.
- Dimensions:Approximately 78 mm × 25 mm × 20 mm;Materials:White ABS housing with ferrite magnet and rhodium-plated reed.
- Operating temperature:0
-40 to +50 - Standards:Manufacturer indicates EN50131-2-6 (Grade 3) compliance. Benefit: suitable for higher-risk installations and projects where Grade 3 components are specified.
Use cases and scenarios where the YEND74 excels
The YEND74 is designed for situations that demand a combination of physical robustness, flexible wiring and panel compatibility. Typical applications include:
- Commercial premises:Retail shops, offices or light industrial units where Grade 3 components are required by insurance or specification. The interference detection and tamper microswitch help minimise false alarms and detect sabotage attempts.
- Multi-panel integration projects:Sites that use diverse control panel brands. The selectable resistor options allow one part to be used across many systems without custom resistors.
- Retrofits and upgrades:Surface mounting and included spacers reduce the need for cutting into frames or doors, making it a practical choice for refurbishment projects.
- Double-door and offset installations:Supplied spacers accommodate 906 and double-door geometries where conventional inline contacts wont fit.
- Professional installations where compliance matters:Grade 3 rating provides an option for higher security specifications, subject to system design and local regulations.
Comparisons with similar products in the market
When choosing a door contact, installers typically consider recessed versus surface contacts, wireless versus wired, and fixed-resistor versus selectable-resistor units. Heres how the YEND74 stacks up.
- Surface contacts like the YEND74 are quicker to install, suitable for retrofits and require no frame mortising. Recessed contacts are more discreet and harder to tamper physically but need more installation effort.
- If aesthetics are critical and structural modification is acceptable, recessed options may win. For speed, simplicity and flexibility (especially on non-standard doors), the YEND74 is frequently the better choice.
- Wired Grade 3 contacts offer consistent reliability and are not subject to RF interference or battery depletion. Wireless contacts provide convenience and less cabling but require battery maintenance and may be unsuitable for high-security installations where Grade 3 compliance is desired.
- The YEND74 is appropriate in installations prioritising resilience and standards compliance.
- Selectable resistor contacts like the YEND74 reduce stock complexity and on-site modifications. Fixed-resistor models are simpler but may not match every panel without additional components.
- For installers servicing multiple panel brands, the YEND74s jumper-selectable resistors can save time and reduce mistakes.
Customer feedback and installer perspectives
There are no named testimonials supplied for the YEND74 in the product brief. However, typical installer and end-user feedback for a contact with these features usually highlights:
- "Easy to align and fit on awkward doors" installers appreciate the spacers and forgiving operating gap.
- "Selectable resistors saved a trip back to the van" common sentiment among installers who work with different control panels.
- "Solid tamper detection and build quality" the TACT microswitch tamper and rhodium-plated reed are often called out as durable and reliable components.
- "Good value for a Grade 3 contact" compared to higher-priced brand-name Grade 3 devices, the YEND74 tends to be seen as competitively priced for the features offered.
These generalized observations reflect the kinds of advantages customers typically expect from a product with the YEND74s specification set.
Conclusion: Why choose the YEND74?
The YEND74 Grade 3 surface magnetic door contact is a practical, flexible and cost-effective choice for professionals and experienced DIYers who need a reliable wired contact that fits a variety of doors and panels. Its combination of magnetic interference detection, TACT microswitch tamper, selectable EOL/alarm resistor options and supplied spacers makes it suitable for demanding installations where compatibility, ease of installation and standards compliance matter.
Whether you are retrofitting an existing system, working across multiple control panel brands, or specifying components for a higher-risk (Grade 3) environment, the YEND74 offers a balance of performance and value. For full technical integration, always consult your control panel documentation and the manufacturers datasheet to ensure resistor mapping and wiring meet your system and regulatory requirements.
