Nittan Standard Deep Diode Base
£7.65 (inc VAT: £9.18)
Summary
The Nittan STB-4SE-SD is a conventional Schottky diode deep detector base designed for indoor mounting applications within fire alarm systems. Combining the enhanced wiring space of a deep profile design with advanced Schottky diode circuit protection technology, this base offers superior performance and installation flexibility for conventional fire detection zones.
Part of the Sensortec range, the STB-4SE-SD features a 23mm depth profile that provides ample space for cable management and terminations, making it particularly suitable for installations with multiple cables or where neat wiring presentation is required. The integrated Schottky diode technology delivers fast switching characteristics, low forward voltage drop, and enhanced circuit isolation to improve system reliability and reduce false alarms.
Certified to EN54-5 and EN54-7 standards, this robust base is constructed from durable ABS material with a standard 104.5mm diameter. Operating across a voltage range of 10-32Vdc and temperature spectrum from -10°C to +55°C, the STB-4SE-SD includes remote indicator lamp (RIL) support at 2mA and meets EMC conformance to BS EN 50130-4, ensuring reliable performance in accordance with European fire safety standards.
Features
- Conventional Schottky diode deep detector base for enhanced protection
- Deep 23mm profile providing superior wiring and cable management space
- Schottky diode technology for improved circuit isolation and false alarm reduction
- Compatible with Nittan Sensortec conventional detector range
- Indoor mounting base for ceiling or wall installation
- Operating voltage range from 10 to 32 Vdc
- Four-terminal conventional wiring configuration
- Remote indicator lamp (RIL) connection supporting 2mA current draw
- Standard 104.5mm diameter with universal mounting pattern
- Robust ABS material construction for long-term durability
- Operating temperature range from -10°C to +55°C
- Storage temperature tolerance from -25°C to +70°C
- Suitable for environments up to 95% relative humidity (non-condensing)
- Fast switching Schottky diodes for reduced power consumption
- Low forward voltage drop for improved electrical efficiency
- EMC conformance to BS EN 50130-4 standards
- CE conformity certified
- Complies with EN54-5 and EN54-7 fire detection standards
FAQs
What are the advantages of Schottky diode technology in this base?
Schottky diodes provide several key advantages: faster switching speeds compared to standard diodes, lower forward voltage drop resulting in reduced power consumption, improved circuit isolation between detectors on the same zone, and enhanced protection against electrical interference. These features contribute to more reliable fire detection performance and reduced false alarm rates in conventional systems.
How does this base differ from the standard STB-4SE?
The STB-4SE-SD incorporates Schottky diode technology for enhanced circuit protection and is designed specifically for conventional systems only, whereas the standard STB-4SE supports both conventional and addressable configurations. The STB-4SE-SD also has a slightly lower maximum operating voltage (32Vdc vs 38Vdc) due to the diode circuit design, but offers superior electrical isolation and false alarm immunity.
Why is the deep profile beneficial?
The 23mm deep profile provides significantly more internal space compared to shallow bases. This extra depth allows easier termination of multiple cables, accommodates larger wire sizes, provides better strain relief for cable entries, and results in neater, more professional installations. It’s particularly valuable in retrofit situations or complex wiring scenarios.
What detectors are compatible with the STB-4SE-SD?
The STB-4SE-SD is designed for use with Nittan Sensortec range conventional fire detectors, including smoke detectors, heat detectors, and multi-sensor detectors featuring the standard twist-lock mounting mechanism. Always verify compatibility with your specific detector model before installation.
Can I use this base with addressable detectors?
No, the STB-4SE-SD is designed specifically for conventional fire alarm systems only. The Schottky diode configuration and terminal layout are optimized for conventional zone wiring. For addressable detector installations, use the standard STB-4SE base which supports both conventional and addressable termination configurations.
How do I wire the remote indicator lamp?
The remote indicator lamp (RIL) is connected to Terminal 5 (RIL -VE) with the positive connection taken from the zone positive supply at Terminal 3. The base supports RIL current draw up to 2mA. The RIL illuminates when the detector enters alarm, providing visible indication at an accessible location for detectors mounted in concealed areas.
What is the maximum loop voltage for this base?
The STB-4SE-SD operates within a voltage range of 10 to 32 Vdc. This is suitable for most conventional fire alarm control panels which typically operate at 24Vdc nominal voltage. The slightly lower maximum voltage compared to non-diode bases is due to the Schottky diode circuit characteristics.
Does the Schottky diode require any special configuration?
No, the Schottky diode circuitry is built into the base and requires no special configuration or setup. Simply wire the base according to the conventional termination diagram provided. The diode automatically provides circuit isolation and protection without any additional user intervention.
Specifications
- Part Number: STB-4SE-SD (F03-82302)
- Description: Conventional Schottky Diode Deep Detector Base
- Device Type: Indoor mounting base
- Product Range: Sensortec
- Diode Technology: Schottky diode circuit protection
- System Type: Conventional only
- Operating Voltage: 10 to 32 Vdc
- Operating Temperature: -10°C to +55°C
- Storage Temperature: -25°C to +70°C
- Relative Humidity: ≤ RH95% non-condensing
- Material: ABS
- Dimensions: ∅104.50mm x 23.00mm
- Mass: 78g
- Terminal Configuration: 1=-VE in, 6=-VE out, 3=+VE in/out, 5=RIL -VE 2mA
- RIL Current: 2mA
- EMC Conformance: BS EN 50130-4
- CE Conformity: Yes
- Standards / Certification: Complies with EN54-5, EN54-7
Downloads
- Datasheet (Adobe PDF)