WattStopper BZ-150 Power Pack ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$142.90
$67.61
WattStopper BZ-150 Power Pack, 120-277V, 50/60Hz, 24VDC, 225mA, w/Auto-On/Manual-On

WattStopper BZ-150 Power Pack 120-277V 24VDC 225mA Auto-On/Manual-On Control System

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Model: BZ-150
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$142.90
$67.61
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WattStopper BZ-150 Power Pack 120-277V 24VDC 225mA Auto-On/Manual-On Control System

Professional Power Supply & Relay Control for Occupancy Sensor Integration

The WattStopper BZ-150 Power Pack delivers reliable 24VDC power and control functionality for occupancy sensor applications. This self-contained power supply relay system operates on 120-277V input with 50/60Hz compatibility, providing 225mA output current for professional lighting control installations. The unit features field-selectable auto-on or manual-on operating modes and integrates seamlessly with low-voltage momentary switches and building management systems.

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 occupancy detection systems.
  • Field-Selectable Operating Modes: Auto-on and manual-on options offer flexible control strategies to match specific application requirements and user preferences.
  • LED Status Indication: Visual feedback for relay status and low-voltage overcurrent conditions enables quick troubleshooting and system monitoring.
  • BMS Integration Capability: Hold-on and hold-off inputs allow seamless connection with building management systems and lighting control panels for centralized control.
  • RoHS Compliance: Meets materials restrictions standards ensuring environmental responsibility and regulatory compliance in commercial installations.
  • Efficient Switching Power Supply: Advanced power conversion technology optimizes performance while minimizing energy consumption and heat generation.

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 Office Buildings
  • Retail and Hospitality Facilities
  • Educational Institutions
  • Healthcare Facilities
  • Industrial and Warehouse Spaces
  • Multi-Tenant Properties
  • Government and Municipal Buildings

Why Choose WattStopper Quality?

WattStopper power packs deliver proven reliability in professional lighting control applications. The BZ-150's RoHS compliance and efficient switching power supply design ensure long-term performance while meeting environmental standards. Compact dimensions and lightweight construction facilitate installation in space-constrained applications while maintaining robust operational capabilities.

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-150 – Frequently Asked Questions

1) Will the WattStopper BZ-150 power pack run on a 277V circuit, or do I need a separate model for 120V?
One part covers both. The BZ-150 accepts 120 through 277V input at 50/60Hz, so the same power pack goes in on a 120V branch circuit in a tenant space and a 277V circuit in a warehouse bay. That is the reason to stock one SKU across a mixed-voltage building instead of matching a pack to each panel.
2) How many occupancy sensors can I run off one BZ-150 power pack?
Count the sensor draw against the output. The BZ-150 supplies 24VDC at 225mA, so add up the milliamp draw of the low voltage sensors you plan to hang on it and stay under 225mA total. Sensors vary widely in draw, so the number of heads is set by their current, not by a fixed head count. The pack has an LED that indicates a low voltage overcurrent condition, so if you overload the secondary you will see it at the pack rather than chasing a dead sensor.
3) Can the BZ-150 be set so lights come on manually instead of automatically when someone walks in?
Yes, and it is a field setting on the pack, not a different part number. The BZ-150 is field selectable between auto-on and manual-on. Manual-on is what you want where an energy code or an owner requires occupants to press a switch to turn lights on while the sensor still handles turning them off. It works with low voltage momentary switches for that manual-on function.
4) Can I override a WattStopper BZ-150 from our building management system?
That is what the hold-on and hold-off inputs are for. The BZ-150 has both, so a BMS or a lighting control panel can force the load on (for a scheduled occupied period or a cleaning crew) or force it off (for after-hours sweep) regardless of what the sensor sees. That makes it usable as the relay layer under a centralized system rather than only as a standalone room control.
5) Will a WattStopper BZ-150 fit in a standard 4-inch square junction box knockout?
The BZ-150 body measures 3.75 in deep, 3.0 in wide and 2.5 in high, with a total volume of 28.12 cu in, and it weighs 0.35 lb. Power packs of this style mount through a 1/2 in knockout with the body sitting inside the box or plenum and the low voltage leads outside, so plan the enclosure around those three dimensions before you order. In a crowded box, the 28.12 cu in the pack occupies is what usually decides whether it goes in.
6) What does the LED on the WattStopper BZ-150 power pack tell me when I am troubleshooting?
Two things. The LED indicates relay status, so you can tell at the pack whether it is calling for the load on, and it indicates a low voltage overcurrent condition, which points at too much sensor load or a short on the 24VDC side. That splits your troubleshooting fast: relay energized but no light is a line side or fixture problem, overcurrent indication is a Class 2 wiring or sensor count problem.
7) Is the WattStopper BZ-150 the same as a low voltage relay, or do I still need a separate transformer?
No separate transformer. The BZ-150 is a self contained power pack: a switching power supply and a relay in one housing. It takes the 120-277V line, produces the 24VDC 225mA that powers the occupancy sensors, and switches the line voltage load on the sensor's command. If you are pricing a job, that is one device per zone rather than a transformer plus a relay.
8) What is the exact part number to order for the WattStopper 120-277V power pack, and where is it made?
Order it as WattStopper BZ-150. That is the manufacturer part number and it covers the 120-277V, 24VDC 225mA auto-on/manual-on configuration. Country of origin is China. For a spec submittal, the BZ-150 is also RoHS compliant.
How fast can I get the WattStopper BZ-150 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-150 come with a warranty?
Absolutely. The WattStopper BZ-150 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-150?
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-150 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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