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USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jun 29 - Jul 4
For Your Every Summer RSVP, with Code: SUMMER15
Description
Haydon EN54-4 Fire Alarm PSU, 27.6V 5A HAY-PSUEN54-5AHaydon HAY PSUEN54 5A is an EN54 4 certified uninterruptible power supply (PSU) for fire detection and life safety systems. The boxed unit delivers a nominal 27. 6 V DC output with a continuous 5 A rating and includes a built in battery charger and battery standby back up within a tamper protected steel enclosure. The PSU provides automatic mains to battery switchover, battery deep discharge protection and status reporting via LEDs and a fault relay.

Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 369 reviews
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Product Reviews
★★★★★ 5
Perfect
Size: 60 Count (Pack of 1)
Excellent quality! No side effects except for great drowsiness with just 1. Take 2 if you need to dream! Good night 💤 Best melatonin I’ve ever had.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 15, 2026
★★★★★ 5
Works great
Size: 60 Count (Pack of 1)
Great Stuff
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 15, 2026
★★★★★ 5
2 mg perfect for me
Size: 60 Count (Pack of 1)
Easier to low dose
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 12, 2026
★★★★★ 4
Good product
Size: 60 Count (Pack of 1)
Good product
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 22, 2025
★★★★★ 5
Usual,y. Helps me sleepme sle
Size: 60 Count (Pack of 1)
Works for me. Helps me have a restful sleep
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 19, 2026
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