• Dual Life-Safety Alert: Combines a high-output acoustic horn with a high-intensity red LED cluster strobe for simultaneous audio-visual evacuation
• High Sound Pressure Output: Delivers minimum 95 dB(A) audible alert at 1 meter across two user-selectable tone profiles
• Regulatory Certification: Approved and certified under LPCB and CE frameworks in full compliance with EN 54-3 standards
• Pulsed Visual Warning: Flashes at an optimal emergency alert frequency of 2.0 Hz (±20%) for swift optical localization
• Low Operating Current: Highly efficient driver drawing ≤ 35 mA start current on standard 24 VDC notification circuits
• Flexible Mounting Base: Supports shallow base (95.9 mm height) for embedded conduits and deep base (110.4 mm) for surface installations
• Wide Panel Compatibility: Connects directly to conventional fire panels or addressable systems via output control modules
The GST C-9403 Conventional Sounder Strobe is a combined audio-visual life-safety notification appliance manufactured by GST (Carrier) to provide emergency evacuation signaling during fire events. Engineered to operate on standard 24 VDC notification appliance circuits (NAC), the GST C-9403 delivers a minimum sound output of 95 dB(A) at 1 meter paired with an omnidirectional, high-intensity LED cluster beacon.
| Product Model | GST C-9403 Conventional Sounder Strobe (Audible & Visual Alarm) |
| Brand Portfolio | GST (Carrier) |
| Standards & Approvals | LPCB Approved (548e/01); CE / CPR Certified (2831-CPR-F0128); EN 54-3 Compliant |
| Operating Power Supply | 24 VDC Nominal (20 VDC to 28 VDC operating range, Polarity-Sensitive) |
| Operating / Start Current | ≤ 35 mA (High-efficiency piezo driver & LED strobe array) |
| Acoustic Sound Output | Tone 1: ≥ 95 dB(A) @ 1 meter | Tone 2: ≥ 95 dB(A) @ 1 meter |
| Selectable Alarm Tones | Tone 1: 2800 Hz (0.34s OFF / 0.4s ON) | Tone 2: 2400 Hz–2900 Hz @ 3 Hz sweep |
| Visual Strobe Source | High-intensity red LED cluster array |
| Strobe Flash Frequency | 2.0 Hz ± 20% (Approx. 120 flashes per minute) |
| Ingress Protection Rating | IP33C (Designed for indoor wall mounting) |
| Wiring Constraints | Polarized 2-wire connection: D1 (+ In), G (+ Out), D2 (- Return) |
| Recommended Cable Gauge | Minimum 1.5 mm² fire-rated twisted cable |
| Mounting Hole Spacing | 55 mm to 80 mm standard universal fixing centres |
| Enclosure Material & Color | Flame-retardant ABS Plastic | Color: Red (PANTONE 1795C) |
| Operating Environment | -10°C to +50°C (14°F to 122°F), ≤ 95% Relative Humidity non-condensing |
| Dimensions (Deep Base) | Φ 110 mm × 110.4 mm (H) | Weight: Approx. 355 g |
| Dimensions (Shallow Base) | Φ 110 mm × 95.9 mm (H) | Weight: Approx. 327.2 g |
Verify acoustic attenuation levels, line voltage drops, and visual coverage spacing in accordance with LPCB Third-Party Life Safety Certifications prior to finalizing installation for your GST C-9403 notification appliance circuits.
📥 Download Official Technical Submittal Datasheet (DS10106299)
Q1: What sound output level does the GST C-9403 sounder strobe deliver?
A: The GST C-9403 produces a sound pressure level of at least 95 dB(A) measured at a distance of 1 meter directly in front of the device.
Q2: Can the GST C-9403 be connected to addressable fire alarm panels?
A: Yes. While the GST C-9403 is a conventional 24 VDC sounder strobe, it connects directly to addressable control panels via monitored sounder circuit outputs or through addressable control/relay modules (such as the GST DI-9301E or DI-9305E).
Q3: How are the alarm tones configured on the GST C-9403?
A: Tone settings are configured via an internal jumper on the circuit board: Tone 1 (2800 Hz pulsed) or Tone 2 (2400–2900 Hz sweep).
Q4: What is the flash rate of the integrated LED strobe on the GST C-9403?
A: The strobe flashes at a frequency of 2.0 Hz ± 20% (approximately 120 flashes per minute), providing rapid visual alerting.
Q5: What are the base mounting options for the GST C-9403?
A: The device supports a shallow base (95.9 mm total height) for embedded junction boxes and an optional deep base (110.4 mm total height) equipped with side knockout entries for surface conduits.
Q6: What is the power requirement for operating the GST C-9403?
A: The GST C-9403 requires a standard regulated 24 VDC line (operating range: 20 VDC to 28 VDC) and draws an operating current of ≤ 35 mA during alarm activation.
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