WattStopper BZ-50 Power Pack 1...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$125.39
$50.81
WattStopper BZ-50 Power Pack, 120-277V, 50/60Hz, 24VDC, 225mA

WattStopper BZ-50 Power Pack 120-277V 24VDC 225mA UL 2043 Plenum Rated Switching Power Supply

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Model: BZ-50
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$125.39
$50.81
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WattStopper BZ-50 Power Pack 120-277V 24VDC 225mA UL 2043 Plenum Rated Switching Power Supply

Professional Power Supply for Sensor and Control Applications

The WattStopper BZ-50 Power Pack delivers reliable 24VDC power conversion from 120-277V AC input with 225mA output capacity. This UL 2043 plenum rated switching power supply features zero crossing circuitry for enhanced reliability and extended product life, making it ideal for professional lighting control and sensor applications requiring consistent low-voltage power.

Professional Features & Benefits

  • 120-277V Input Range: Universal voltage compatibility reduces inventory requirements and simplifies installation across diverse electrical systems.
  • 24VDC 225mA Output: Optimized current delivery based on connected sensor load provides efficient power management for multiple devices.
  • UL 2043 Plenum Rating: Certified for air handling spaces enables cost-effective installation in commercial HVAC environments without additional enclosures.
  • Zero Crossing Circuitry: Advanced switching technology minimizes electrical stress and extends component life for long-term reliability.
  • LED Status Indicator: Visual confirmation of relay operation and low-voltage overcurrent conditions simplifies troubleshooting and maintenance.
  • Self-Contained Design: Integrated power supply and relay system reduces installation complexity and space requirements.
  • RoHS Compliant: Meets materials restrictions for environmentally responsible installation in commercial and institutional facilities.

Technical Specifications

  • Country Of Origin: China
  • Product Depth Us: 3.75 in
  • Product Height Us: 2.5 in
  • Product Volume Us: 28.12 cu in
  • Product Weight Us: 0.35 lb
  • Product Width Us: 3.0 in

Professional Applications

  • Commercial Lighting Control Systems
  • Occupancy and Daylight Sensor Networks
  • Building Automation Integration
  • Professional Office Environments
  • Retail and Hospitality Facilities
  • Educational and Healthcare Institutions
  • Industrial Control Applications

Why Choose WattStopper Quality?

WattStopper power packs deliver proven reliability through UL 2043 plenum certification and RoHS compliant construction. The efficient switching power supply design with zero crossing circuitry ensures consistent performance and extended service life, backed by professional-grade engineering for demanding commercial applications.

Manufacturer Resources

Product Specs

Country Of Origin:
China
Product Depth Us:
3.75 in
Product Height Us:
2.5 in
Product Volume Us:
28.12 cu in
Product Weight Us:
0.35 lb
Product Width Us:
3.0 in

WattStopper BZ-50 – Frequently Asked Questions

1) Will the WattStopper BZ-50 power pack run on 277V, or do I need a separate model for 120V panels?
One part covers both. The BZ-50 accepts 120-277V AC input at 50/60Hz, so the same power pack goes in on a 120V branch circuit or a 277V one. That's why contractors stock a single model instead of splitting inventory by voltage across a building.
2) How many occupancy sensors can a BZ-50 power pack support?
The BZ-50 puts out 24VDC at 225mA, so the count depends on the draw of the sensors you're wiring to it. Add up the milliamp draw of each low-voltage device on the circuit and stay at or under 225mA total. Past that you need a second power pack. There is an LED indicator on the unit that signals low-voltage overcurrent, so an overloaded run shows itself at startup rather than intermittently later.
3) Can I install a power pack above the ceiling in a return air plenum?
The BZ-50 is UL 2043 rated, which is the standard covering heat and smoke release for equipment installed in air handling spaces. That means it can go directly above an accessible ceiling in a return air plenum without building it into a separate enclosure, which is the usual reason a non-rated power pack has to be boxed or dropped below the ceiling line.
4) Does a WattStopper power pack switch the lighting load itself or do I still need a separate relay?
No separate relay needed. The BZ-50 combines the 24VDC supply and the switching relay in one housing, so the sensor's low-voltage signal drives the relay inside the same unit that powers it. That's the whole point of a power pack versus a bare 24V transformer, and it's why one device per lighting zone is typically all the ceiling hardware you need.
5) Will a WattStopper BZ-50 fit through a standard 4 inch octagon junction box knockout mount?
The BZ-50 body measures 3.75 in deep by 2.5 in high by 3.0 in wide and weighs 0.35 lb, with a total volume of 28.12 cu in. It's a self-contained unit with an integrated transformer and relay, so it hangs off the box on its threaded nipple rather than sitting inside it. Check the clear space above your ceiling grid against the 3.75 in dimension before you commit to a tight cavity.
6) What does the LED on the WattStopper BZ-50 tell me when I'm troubleshooting a zone that won't turn on?
The LED reports two things: relay operation and low-voltage overcurrent. So if the lights aren't switching, the LED separates a sensor or signal problem from an overloaded 24V bus. An overcurrent indication points at too much sensor load on the 225mA output, not at a failed relay.
7) Is the WattStopper BZ-50 RoHS compliant for a public agency or healthcare spec?
The BZ-50 is RoHS compliant, which covers the restricted-materials line item that shows up on institutional and government submittals. It also carries the UL 2043 plenum rating, the other item that usually gets flagged on those same submittals when the device goes above a ceiling. Country of origin is China.
How fast can I get the WattStopper BZ-50 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the WattStopper BZ-50 come with a warranty?
Absolutely. The WattStopper BZ-50 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the WattStopper BZ-50?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the WattStopper BZ-50 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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