Buyout Special

Universal UB1640W 16.5 VAC 40VA Plug-In Wall Transformer

Brand:| Model: UB1640W
This 16.5 VAC adapter stands ready to fill your security or home automation needs at a bargain buyout price. Quantities are limited!
  • UL listed
  • Security screw holds transformer to duplex outlet
  • Convenient connection by screw terminal
Part # 
Weight: 1.55 lbs.  
List Price$34.99
Regular Price$16.00
You Save38%
Sale Price
Buy 4-9 $9.25
Buy 10-up$8.39
Part # 129-140
Qty:  EA
Available Payment Methods

Product Details

Universal UB1640W 16.5 VAC 40VA Plug-In Wall Transformer

Originally manufactured for Brinks alarm systems and perfect for security or home automation, this grounded and internally fused 16.5 VAC, 40VA plug-in transformer is UL listed and features connection by screw terminal. The adapter has a screw that allows to be secured to any 120 VAC duplex socket to prevent tampering or accidental disconnection. Dimensions: 4.05" L x 2.24" W x 2.64" H.

Product Specifications
  • AC Output Voltage16.5V
  • Current Capacity2400 mA
  • Center/Tip PolarityAC
  • Plug SizeScrew Terminals
  • Input Voltage110~120 VAC
Universal UB1640W 16.5 VAC 40VA Plug-In Wall Transformer
  • BrandFactory Buyouts
  • ModelUB1640W
  • Part Number129-140
  • UPC806593717826
  • Product CategoryAC/DC Power Adapters
  • Unit of MeasureEA
  • Product Rating
    (2 Reviews)
  • Weight1.55 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Similar Products

View similar products to the Universal UB1640W 16.5 VAC 40VA Plug-In Wall Transformer
in the AC/DC Power Adapters product category.


Universal UB1640W 16.5 VAC 40VA Plug-In Wall Transformer
Universal UB1640W 16.5 VAC 40VA Plug-In Wall Transformer is rated 4.5 out of 5 by 2.
Rated 5 out of 5 by from great serviceEasy to order and everything as promised. Replacement for original
Date published: 2015-01-17
Rated 4 out of 5 by from Good Product, Poor PackagingThe transformers are going to work out great! They will heat our toilet seats nicely.However I wish the packaging they showed up in was better. We resell these transformers to our customers that buy our heated toilet seats. I am going to have to pack each one of the transformers in a box in order to send them to customers. This review would have been a 5/5 if they were packed in individual boxes. I have been buying transformers like this for years and they have always been in individual boxes.
Date published: 2014-06-16
  • 2015-07-28T07:07CST
  • bvseo_cps, prod_bvrr, vn_cps_3.1.5
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_2
  • loc_en_US, sid_129-140, PRD, sort_mostRecent
  • clientName_PartsExpressInternational

Product Q&A

Get your questions answered from other customers
who own this product or have experience with it.
If your question requires design or troubleshooting information,
please email  for a prompt reply.
Universal UB1640W 16.5 VAC 40VA Plug-In Wall Transformer

What voltage are the terminals?  Is it 16.5V-0V-16.5V or 8.25V-0V-8.25V?

Asked by: Stopher
16VAC is measured on the two outer terminals
Answered by: TomI
Date published: 2015-03-10

This transformer is recommended by PE as good choice to power the new stock Yuan-Jing Lehmann Clone Headset amplifier. But where does the minus 15 volts come from ? Is + and - already split on the board ?

Asked by: Piano Man
Connect the outer +15 and -15v then the center ground to the center terminal for the board ground.
Answered by: TomI
Date published: 2015-02-02

Where is groung on this UB 1640w i want it to replace my old one on my alarm.I am 84 and not a elec.THANKS

Asked by: bigmac 84 and half
Ground is the center connection.
Answered by: TomI
Date published: 2015-02-02

What is the actual voltage output of this power supply? I know what it's advertised as, but I was thinking of replacing the PS that comes with the Lepai mini power amps with one of these. Would you recommend these for that purpose?

Asked by: m00se
The output of this power supply is AC and is not recommended for any of the small amplifiers that we offer.
Answered by: MattP
Date published: 2014-07-07

Will this work as a replacement transformer on  a craftsman drill 15.6V battery charger? I don't have the original transformer...I tried a 1 Amp transformer and that burned out... 

Asked by: dcfrisbie
Unfortunately this will not work as a battery charger. You will need a dedicated charger for that specific battery which we do not have.
Answered by: MattP
Date published: 2014-05-05

Can this work to power a door bell

Asked by: Allset1022
If the doorbell chime requires 16.5VAC at less than 40 VA this will work perfectly fine.
Answered by: MattP
Date published: 2014-04-23
  • 2015-07-28T08:21CST
  • bvseo_cps, prod_bvqa, vn_cps_3.1.5
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_7
  • loc_en_US, sid_129-140, PRD, sort_recentQuestionsFirst
  • clientName_PartsExpressInternational

Customer Projects

Customer projects that include: Universal UB1640W 16.5 VAC 40VA Plug-In Wall Transformer

If you built a project using this product, post it in the Parts Express Project Gallery.

Customer Discussions

If you would like to start a discussion about this product, post a thread in the TechTalk Customer Forum.
Get Deals
emailed to you every week.

Be the first to hear about new and exciting products,special pricing and incredible deals!

See This Week's "GET DEALS" Email
Parts Express
725 Pleasant Valley Dr.Springboro,OH 45066USA

© 1986-2015 Parts Express, All Rights Reserved

Live Chat Software