can this be installed in an attic?

Yes, the transformer may be installed in an attic.

Is it normal that the product makes an electric humming noise no matter the load is existed or not?

I did notice an electric humming noise when I installed mine. I think this is typical of a transformer at this price point.

This item I purchased just quit working. How do I get a replacement.

First, click on your order on Amazon.com and look at your options.

How do you mount the 3tran to a junction box? it has a weird set up

You will need a metal plate with a center hole large enough for the attachment to pass through. First attach the transformer to the plate, wire the transformer to the power, then screw the plate with transformer on to the junction box. They sell these plates at hardware stores. Take the transformer with you and pick out the one that works. Good Luck and Good DIYing!

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3TRAN Tri-Volt (8vac/10VA, 16vac/10VA or 24vac/20VA) Transformer for for Ring, Nest and Standard Doorbells 1pk

Product ID: 92097648

Details

Brand
Newhouse
Current Rating
3 A
Mounting Type
Surface Mount
Power Source
Corded
Product Dimensions
2.63"D x x

⚡3 selectable voltage outputs

📏Compact 2.6" x 2.5" footprint

🔧UL certified safety standard

₨757

Duties & taxes included

In stock

Sold byAmazon SeychellesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power your smart entryway with precision and style!

UNIVERSAL COMPATIBILITY - Seamlessly powers Ring, Nest, and standard doorbells—upgrade your smart home effortlessly.
RELIABLE UL CERTIFICATION - Built to meet strict safety standards, ensuring peace of mind with every installation.
TRI VOLT POWER FLEXIBILITY - Choose from 8VAC/10VA, 16VAC/10VA, or 24VAC/20VA to perfectly match your doorbell system’s needs.
COMPACT SURFACE MOUNT DESIGN - Space-saving footprint fits discreetly while allowing proper ventilation to prevent overheating.
UPGRADE YOUR DOORBELL EXPERIENCE - Eliminate chime issues caused by underpowered transformers and enjoy flawless performance.

The Newhouse Hardware 3TRAN Tri-Volt Transformer offers versatile 3-output voltage options (8VAC/10VA, 16VAC/10VA, 24VAC/20VA) to power Ring, Nest, and standard doorbells. UL certified for safety, it features a compact surface-mount design that ensures proper heat dissipation. Ideal for upgrading old, underpowered transformers, it delivers reliable, efficient power to keep your smart home entry system running flawlessly.

Specifications

ASIN	B01GSRLE8U
Best Sellers Rank	#2,220 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2 in Door Bell Transformers
Brand Name	Newhouse Hardware
Current Rating	3 A
Customer Reviews	4.3 4.3 out of 5 stars (707)
Global Trade Identification Number	00726843008361
Included Components	Tri-Volt Transformer
Item Dimensions D x W x H	2.63"D x 2.56"W x 2.25"H
Item Type Name	for Ring, Nest and Standard Doorbells 1pk
Item Weight	14.08 ounces
Manufacturer	Newhouse Hardware
Model	3TRAN
Mounting Type	Surface Mount
Number of Items	1
Part Number	3TRAN
Power Source	Corded Electric
Specification Met	UL
UPC	726843008361
Unit Count	1 Count
Warranty Description	2 Year Warranty

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