Shows a 5 - 50 w power consumption. does that mean they draw max w at start up and then ramp down as they reach max temp? if not please explain

Initially these PTC heating element will draw low current <1 amp for a few seconds and then they will draw nearly 4.5 amps for about 10 seconds and stabilizes to about 2 amps at maximum temperature. To make this more manageable I found ramping the voltage up to 12VDC from 9VDC keeps the current below 3 amps at all times but does increase the time to get to full temperature (<40 seconds) . You can do your own voltage profile to see what fits your application best.

How many amps does does one unit draw?

0.9A-4.5A-2.0A is the current swing.

If I power these a limited current 12v power supply (lets say 500milliamps) will that limit the temperature or will it simply not function?

These should just limit the temperature available with lower amperage. These type of devices should be able to vary the temperature based on the current provided. I have not put these in service yet, but that is what I am expecting while using these as a heater when combined with heat sinks.

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2pcs PTC Heating Element 5W-50W AC DC 12V 220 Degree consistant Temperature Ceramic Thermostatic

2pcs PTC Heating Element 5W-50W AC DC 12V 220 Degree consistant Temperature Ceramic Thermostatic

Q: How many amps does does one unit draw?

0.9A-4.5A-2.0A is the current swing.

Q: If I power these a limited current 12v power supply (lets say 500milliamps) will that limit the temperature or will it simply not function?

These should just limit the temperature available with lower amperage. These type of devices should be able to vary the temperature based on the current provided. I have not put these in service yet, but that is what I am expecting while using these as a heater when combined with heat sinks.

Product ID: 738041084

Details

Brand
Bestol
Colour
Black
Form Factor
Stationary
Indoor/Outdoor Usage
Indoor
Special Feature
Adjustable

⚡5W-50W adjustable power

🔌12V AC/DC dual voltage

🌡️Consistent 220°C surface temp

€ 35.13

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Description

🔥 Stay ahead of the chill with precision heat that never quits!

DURABLE CERAMIC BUILD - Crafted with high-quality ceramic insulation ensuring long service life and enhanced safety with surface insulation heat protection.
PLUG PLAY CONVENIENCE - Comes as a 2-pack with 150mm high-temp lead wires for easy installation and immediate use—no fuss, just warmth.
DUAL VOLTAGE FLEXIBILITY - Seamlessly compatible with both 12V AC and DC power sources, perfect for versatile indoor setups from home to office.
OPTIMIZED POWER EFFICIENCY - Adaptive power consumption that intelligently adjusts based on heat dissipation, maximizing energy efficiency without compromising performance.
RAPID HEAT UP LASTING WARMTH - Experience quick, reliable heating with PTC technology that maintains a steady 220°C surface temperature for consistent comfort.

This 2-piece PTC heating element set delivers reliable, consistent heating at 220°C with adjustable power from 5W to 50W, operating on 12V AC/DC. Designed with durable ceramic insulation and high-temp lead wires, it ensures safety, longevity, and easy installation for diverse indoor applications including home, office, and outdoor shelters.

Specifications

ASIN	B07VBDT8NL
Amperage	4.17 Amps
Best Sellers Rank	#711,276 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #934 in Heater Parts & Accessories
Brand Name	Bestol
Colour	Black
Form Factor	Stationary
Fuel Type	Electric
Global Trade Identification Number	08846985146331
Heat Output	50 Watts
Heating Element	Radiant
Heating Method	Convection
Indoor Outdoor Usage	Indoor
Item Dimensions D x W x H	4D x 4H Millimeters
Item Weight	0.02 Kilograms
Manufacturer	B12019071802
Max Temperature Setting	428 Degrees Fahrenheit
Min Temperature Setting	20 Degrees Celsius
Mounting Type	Floor Mount
Number of Items	2
Number of Packs	2
Part Number	AAA710
Power Source Type	Corded Electric
Recommended Uses For Product	Office, Home, Garage, Desk, Patio, Camping, Tent, Garden, Greenhouse
Room Type	Living Room
Special Features	Adjustable Temperature

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