Cabac | Hourly Mech Timer 3 Wire 240V 5 Amp | Switch Mechanism
The Cabac HNS450TM is a 3-wire hourly mechanical timer switch rated 240V 50Hz, 5A maximum current for use with fans, motors, and iron core ballasts. The HNS450TM is programmable from 1 to 24 hours in 1-hour increments and includes both quick-tap and sustained-press operating modes. Manufactured in Australia to comply with EMC emissions and safety standards, the HNS450TM fits standard HPM and Clipsal switch plates.
Exhaust fans and heated towel rails often run unnecessarily, wasting energy when occupants forget to switch them off. A dedicated timer avoids the need for hourly manual intervention and prevents power from staying on overnight. The HNS450TM solves this problem with a straightforward mechanical timer that activates on a single button press and automatically cuts power after the programmed duration.
Licensed electricians value the HNS450TM for its modular, retrofit-compatible design that fits existing wall installations without rewiring. The flexible timer range (1–24 hours) suits everything from heated towel rails to pool pumps and garden lighting circuits. The durable mechanical mechanism operates reliably without programming complications, and the amber LED status indicator shows operation and remaining time at a glance. When mains power is restored, the HNS450TM automatically powers ON in timer mode—no reset needed on each outage.
Features
- 3-wire configuration — suitable for fans, motors, and iron core ballasts where 2-wire timers are not rated.
- 1–24 hour programming — set in 1-hour increments using the push button without DIP switches or dip settings.
- Quick-tap operation — one short press turns power on; the LED flashes to show timeout hours; another tap cancels and turns power off.
- Boost mode — hold the button down to activate double timeout, up to 24 hours maximum, for extended runtimes without reprogramming.
- 10-minute warning — the LED flashes during the final 10 minutes before automatic shutoff, signalling imminent timeout.
- HPM and Clipsal compatibility — fits standard wall plates for both brands; supplied with both HPM-style and Clipsal-style push buttons for a perfect match.
- Retrofit friendly — mechanical module installs into existing switch casing without modification; no additional wiring required.
- Amber LED indicator — shows device status and operation mode at a glance; double blink every 5 seconds in boost mode.
- Power retention — retains programmed timeout setting even after power loss; resumes operation on power restoration.
- 5A rated current — maximum 1200W/500VA load capacity; suitable for most residential and light commercial circuits.
- Remote switch compatible — optional remote momentary switch (HPM EM870K or Clipsal 681M20P) allows control from external locations up to 50 metres away.
- Not suitable for dimmable or variable-load applications — the HNS450TM is designed for fixed on/off loads only, not dimmed or PWM circuits.
Where to use
- Heated towel rails — replace continuous on/off switching with timed operation to save energy and extend element life during infrequent use periods.
- Exhaust fans — run bathroom and kitchen fans for a set time after bathing or cooking, then automatically shut off without user intervention.
- Garden and decorative lighting — timer circuits for outdoor garden lights, pool lighting, and landscape features that run for limited periods each night.
- Pool and water feature pumps — automate small circulation pumps for pools, fountains, and water features that need scheduled run times.
- Bedroom heaters and space heating — program wall-mounted heater circuits to run for 1–24 hours, ideal for overnight heating or daytime warm-up schedules.
- Commercial and retail applications — outdoor signage lighting, storeroom exhaust, and display equipment that require timed operation during business hours.
The Cabac HNS450TM is not suitable for high-inrush loads such as compressors, large motors, or induction heating elements that exceed 5A or 1200W. Do not use the HNS450TM with dimmable lights, LED driver circuits, or any variable-load equipment. The timer is designed for on/off fixed loads only.
Verified Sparky Direct customer reviews: Cabac - Hourly Mech Timer 3 Wire 240V 5 Amp (HNS450TM)
"Perfect little switch." — SD
"Ideal for applications like bedroom heaters that draw less than 5A." — Chalkyt
"good price and fast delivery" — Matthew