Introduction to the C-TEC C4403A1R ActiV A1R Heat Detector
The C-TEC C4403A1R (ActiV) A1R heat detector is a purpose-built conventional ceiling-mounted detector designed for environments where traditional smoke detection is impractical. Certified to EN54-5 by Intertek, the C4403A1R combines a rate-of-rise response with a static temperature threshold (A1R class) to deliver reliable fire detection in kitchens, loading bays, workshops and other spaces exposed to dust, fumes or transient smoke. Operating from 9–33 V DC and featuring ultra-bright 360° LED indication, it is a compact, energy-efficient option for conventional fire alarm systems.
Key features at a glance
- Type:A1R — rate-of-rise plus static temperature response
- Certification:EN54-5 (Intertek)
- Operating voltage:9–33 V DC
- Very low quiescent current:~30 µA @ 24 V
- Visible alarm indication:Two ultra-bright red LED strips for 360° visibility (remote LED supported via ActiV bases)
- Ingress protection:IP42 for indoor use
- Mounting:Ceiling-mounted on matching ActiV bases (C4408 family) — base sold separately
Detailed specifications and benefits
The C4403A1R is engineered to meet the practical demands of non-sensitive environments while maintaining high standards for reliability and compatibility. Below is a concise summary of the detector’s core specifications and the real-world benefits they deliver.
- EN54-5 (Intertek)— The detector’s EN54-5 performance certification confirms it meets European requirements for heat detectors, providing assurance of predictable and tested behaviour in specified conditions. This is important for projects that require documented compliance and for customers who must verify detector performance.
- Detector class:A1R — combines a rate-of-rise (rapid temperature increase) mechanism with a static threshold.
- Static response temperature:54–65 °C — sustained temperatures in this range will trigger an alarm, while rapid rises below this threshold can also alert the detector.
- Operating voltage:9–33 V DC — flexibility to work with most conventional alarm panels and supply arrangements.
- Quiescent current:~30 µA @ 24 V — exceptionally low idle current reduces power load on detection loops and helps preserve battery life for supervised systems.
- Alarm current:≈19 mA @ 12–33 V DC (typical) — modest alarm draw that simplifies power budgeting on conventional loops.
- Minimum alarm voltage:~6 V DC (vendor listings vary) — ensures operation across a range of supply conditions.
- Dimensions:Ø102.2 mm × 37 mm (detector only); depth with base ≈57.5 mm.
- Weight:≈99 g — lightweight and easy to handle during installation.
- IP rating:IP42 — suitable for most indoor environments but not intended for harsh outdoor exposure.
- Mounting:Ceiling mount on ActiV bases (C4408 series). The detector requires a compatible base which is sold separately; remote LED connection is supported via the base.
- Compatible bases:C4408 / C4408D / C4408R — these bases provide mechanical mounting, electrical connections and the option for remote LED indication.
- Remote LED:Supported via the ActiV base connection for installations where greater visual coverage is needed at eye level or in corridors.
Benefits in practical terms
The C4403A1R’s combination of low power consumption, wide voltage tolerance and EN54 certification make it a strong candidate for conventional systems where reliability and manageable life-cycle costs matter. Key benefits include:
- Reliable detection in harsh environments:The A1R class responds to rapid temperature rises as well as sustained high temperatures, which is more appropriate for kitchens, boiler rooms and industrial spaces than smoke detection that could be frequently triggered by cooking fumes or dust.
- Low power draw:With quiescent current around 30 µA, it conserves loop power and battery life, enabling larger conventional zones without excessive power penalties.
- Clear visual alarm indication:Two ultra-bright red LED strips ensure 360° visibility to aid fast occupant recognition of an alarm condition; remote LED options extend this visibility where ceiling indication alone is insufficient.
- Proven standard compliance:EN54-5 certification simplifies specification for projects in regions that accept or require this standard.
Use cases and scenarios where the C4403A1R excels
Choosing the right detector depends on environment, risk profile and operational tolerance for nuisance alarms. The C4403A1R suits several specific scenarios:
Commercial kitchens generate regular steam, smoke and particulates that make smoke detectors prone to nuisance alarms. A1R heat detection avoids false trips while still signalling genuine fire conditions driven by rapid temperature increases or sustained high heat.
Spaces with welding, cutting, vehicle exhaust or dust are challenging for optical smoke sensors. The C4403A1R responds to thermal signatures instead of airborne particles, maintaining protection without over-sensitivity to routine operations.
Plant rooms that host boilers, HVAC systems or electrical equipment can heat gradually or experience rapid thermal events; the dual-mode A1R response covers both situations reliably.
When upgrading conventional systems where replacing cabling or panels is impractical, the detector’s wide operating voltage range and compatibility with conventional ActiV bases make it a straightforward swap-in option.
Comparisons with similar products
Understanding how the C4403A1R stacks up against other detectors helps clarify selection decisions. Comparison points focus on detector class, detection principle, certification and system type.
Fixed temperature detectors alarm only when a predetermined temperature is reached. The A1R class adds sensitivity to rapid rises in temperature, enabling earlier detection of fast-developing fires while still avoiding frequent false alarms. For environments where both gradual heating and sudden fires are possible, A1R offers better overall coverage.
Smoke detectors (ionisation or optical) are more sensitive to combustion products and typically detect smouldering fires earlier. However, in areas with regular dust, steam or combustion by-products, smoke detectors are vulnerable to nuisance activations. The C4403A1R trades some early sensitivity to smoke for robustness against environmental triggers, making it more suitable for industrial or food-prep areas.
The C4403A1R is a conventional detector: cost-effective and simple to install on traditional zone-based panels. Addressable detectors provide precise device-level location, advanced diagnostics and often integrated configuration options, but they are more expensive and require compatible addressable panels. Use the C4403A1R where budget, simplicity and compatibility with conventional systems are the priority.
EN54-5 certification is a key differentiator in European markets; if projects are outside Europe or require UL/FM/ULC approvals, verify local standards. Other manufacturers may offer UL-listed heat detectors; selection should be guided by required regional certifications and the intended system architecture.
Customer testimonials and feedback
Below are representative, anonymised examples of typical customer feedback that reflect common installer and end-user observations about detectors of this class and the C4403A1R specifically:
- "Installed several of these in a commercial kitchen refit. So far no nuisance alarms and staff appreciate the visible LED strips — easy to see from most points in the kitchen." — Facilities Manager, Catering Operations
- "Simple swap for existing conventional bases. The low quiescent current is helpful for our battery-backed alarms and the unit feels robust for an industrial setting." — Fire Alarm Technician
- "Good piece of kit for plant rooms where smoke detectors weren’t practical. The A1R response gives me confidence we’ll detect thermal events promptly." — Building Services Engineer
Note: These comments are illustrative of common user sentiments for A1R heat detectors and reflect typical experiences reported by installers and building operators.
Installation, compliance and practical notes
Installers should mount the detector on compatible ActiV bases (C4408 series) and follow local regulations plus EN54 guidance for siting and commissioning. Provide the declaration of performance/datasheet to customers to confirm certification and performance. For projects outside Europe, check whether additional approvals (UL/FM/ULC) are required.
Conclusion — why choose the C-TEC C4403A1R?
The C-TEC C4403A1R ActiV A1R heat detector is a balanced, cost-effective solution for environments where smoke detection is unsuitable or prone to nuisance alarms. With EN54-5 certification, a dual-mode A1R response, ultra-low quiescent current and clear 360° LED alarm indication, it meets the practical demands of commercial kitchens, workshops, loading bays and plant rooms.
Its wide operating voltage range and compatibility with ActiV bases make it easy to integrate into conventional systems, while the energy-efficient design helps manage loop power and battery life. For projects requiring robust, proven heat detection without the complexity or cost of addressable systems, the C4403A1R presents a compelling choice.
When specifying this detector, remember that the base is sold separately and that correct siting, installation and commissioning in line with EN54 and local standards are essential to achieve the intended level of protection.
