text.skipToContent text.skipToNavigation

Power Pack, 120-277V, 50/60Hz, 24VDC, 225mA

  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getAggregateRating, 25ms
  • bvseo-msg: The resource to the URL or file is currently unavailable.;

The BZ-50 Universal Voltage Power Pack provides 24 VDC operating voltage to Wattstopper’s low-voltage occupancy sensors. This device is constructed with environmentally friendly materials and is RoHS-compliant.

Connection Type Wire Leads
  • Send
  • Save as PDF
  • Add to favorites"> Remove from favorites
    Add to favorites Remove from favorites


  • Self-contained power supply relay system
  • Efficient switching power supply providing optimized current output based on number of sensors
  • LED indicates status of relay or if there is a low-voltage overcurrent
  • The product meets the materials restrictions of RoHS
  • Zero crossing circuitry for reliability and increased product life
  • UL 2043 plenum rated for cost-effective installation
  • 1/2” snap-in nipple attaches to standard electrical enclosures through 1/2” knockouts


General Info
Product Line Wattstopper
UPC Number 754182922901
Country Of Origin China
Application Sector Commercial
Warranty Type 5-Year
Product Width US 3.0 in
Product Weight US 0.35 lb
Product Volume US 28.12 cu in
Product Depth US 3.75 in
Product Height US 2.5 in
Technical Information
Amperage 20 A
Voltage 120/277 V
Connection Type Wired


  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getReviews, 6ms
  • bvseo-msg: The resource to the URL or file is currently unavailable.;

Questions & Answers

What is the Source/Sink limit in mA of the Blue Control Output wire?

Asked by: Paul Schmid
The transformer in the BZ-50 provides up to 225 mA of 24VDC power for the low voltage devices. The relay in the BZ-50 is switching and therefore does not have a Source/Sink mA limit. The relay will output either 120v or 277v depending on your input voltage.
Answered by: Justin
Date published: 2024-01-30

Trying to put these in an existing building, can I switch the power pack on and off with a switch in the room? Instead of the switch leg coming off the BZ-50? 

Asked by: Anonymous
Hello, The BZ-50 will allow a standard Line voltage switch to be installed on the Red switch leg wire.
Answered by: Justin
Date published: 2024-01-25

Can I use the BZ-50 to control 12watt Led wall lights? Max 3 fixtures, total 36w 120v

Asked by: Keith
Yes, as long as you do not exceed the 20A load limit.
Answered by: Tier 1 Tech Support
Date published: 2023-09-11

Is there a minimum load requirement for the BZ-50?

Asked by: Tristan
How much sensor can use this power pack
Answered by: Val
Date published: 2023-04-18

What is the recommended relay for the BZ-50?

Asked by: Aaron
Does the power pack needs a switch leg from the switch or can i use Switch leg from light for the sensor to work
Answered by: Keith
Date published: 2022-10-31

What is the maximum wire length for the BZ-50 output using 18 AWG wire?

Asked by: ClarkG56
The following attached image is a Tech Bulletin regarding Voltage Loss. It discusses wires lengths, gauges, and the corresponding voltages losses.
Answered by: Tier 1 Tech Support
Date published: 2022-05-31

Is there a compatible time clock available that intagrates with the power packs

Asked by: Mike
Wattstopper has a low voltage time switch called a TS-400-24 that's compatible with the low voltage power pack.
Answered by: Tier 1 Tech Support
Date published: 2022-02-17

How long do these last and when will u need to replace them?

Asked by: Nestor
The BZ Power Packs come with a 5 year warranty. Although every environment and situation is different, they are expected to last long after that warranty expires.
Answered by: Tier 1 Tech Support
Date published: 2022-02-01
  • y_2024, m_3, d_3, h_9CST
  • bvseo_bulk, prod_bvqa, vn_bulk_3.0.38
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_9
  • loc_en_US, sid_BZ-50, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_legrand
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getContent, 9ms