SKU: 66021909385

WELWYN ULW3-100RJA1 Through Hole Resistor, 100 ohm, 350 V, Axial Leaded, 3 W, � 5%, ULW Series

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Description

WELWYN ULW3-100RJA1 Through Hole Resistor, 100 ohm, 350 V, Axial Leaded, 3 W, � 5%, ULW SeriesThe Welwyn ULW3 series are axial leaded UL recognised wirewound resistors. Resistance range includes E24 decade values from 4. 7ohm to 100 ohm. Isolation voltage of 350V Power rating at 25C is 3W Available in 5% tolerance Temperature coefficient of resistance 200ppm C Operating temperature range 55C to +155C UL1412 recognised fusible resistor Failsafe mains fusing at 120 240Vrms Inrush and surge withstanding Applications Consumer Electronics, Portable

The Welwyn ULW3 series are axial leaded UL recognised wirewound resistors. Resistance range includes E24 decade values from 4.7ohm to 100 ohm.
  • Isolation voltage of 350V
  • Power rating at 25�C is 3W
  • Available in 5% tolerance
  • Temperature coefficient of resistance �200ppm/�C
  • Operating temperature range -55�C to +155�C
  • UL1412 recognised fusible resistor
  • Failsafe mains fusing at 120 / 240Vrms
  • Inrush and surge withstanding

Applications

Consumer Electronics, Portable Devices, Power Management, Industrial

Product details

Temperature Coefficient � 200ppm/�C
Power Rating 3W
Resistor Element Material Wirewound
Automotive Qualification Standard -
Resistance 100ohm
Resistance Tolerance � 5%
Product Range ULW Series
Resistor Case Style Axial Leaded
Voltage Rating 350V

Other details

Brand WELWYN
Part Number ULW3-100RJA1
Quantity Each
Technical Data Sheet EN

All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them. Image is for illustrative purposes only. Please refer to product description.

Shipping Notes
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Exchange/Return Notes
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SKU: 66021909385

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4.5 ★★★★★
Based on 28 reviews
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A
Verified Purchase
ABK
Port Orchard, US
★★★★★ 5
Great no shows for people with larger feet
Size: Large, Color: (001) Black / Black / Castlerock
Some of my favorite socks!! Great quality, fit, and material. I love that they don't slip down in my shoes, especially considering I have larger feet. I also love that Under Armour offers larger sizes in their socks considering everyone in our household has much larger feet than others.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026
T
Verified Purchase
Tatacrio
Cuba, US
★★★★★ 5
Best liner socks EVER
Size: Medium, Color: (348) Silica Green / Silica Green / Hydro Green
I have them in every color and used to get them from Sams, but they stopped selling them and I was lucky to find them on Amazon. Got all colors again. They stay, it's all I'm gonna say! And don't show in any of my tennis shoes. Absolutely love them and wear them until they get holes. They last a LONG time too. They're on the thin side and my foot loves them because they tend to get hot. There's no shrinking, they wash great with exception of the white ones I couldn't manage to keep white - they turned a bit greyish.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 4, 2026
C
Verified Purchase
Christy F
Waukegan, US
★★★★★ 5
Great socks
Size: Medium, Color: Pink - 647
Well-made and comfortable to wear. Great for golf and other outdoor activities. Like them because they do not show above shoes.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 19, 2026
C
Verified Purchase
Cait E
Fort Morgan, US
★★★★★ 5
These ACTUALLY stay put all day long - I was skeptical, but am so glad I took a chance on these
Size: Medium, Color: (014) Halo Gray / Halo Gray / Castlerock
I was so skeptical about whether these would stay on my feet all day without sliding down into my shoe - I’ve tried so many socks in the past with the silicone strip on the heel which failed. I’ve owned these for a couple months now and they have never slipped down - they stay put all day! I love the variety of colors to choose from, and the value per pack is great since six pairs come per pack (I thought it was only three when I first purchased and was pleasantly surprised by the additional pairs). They also have perfect thickness - not too warm to wear during the summer months with sneakers; I live in a tropical climate, though, so I’m not sure how they will do in cooler climates. I’ve washed each pair once or twice and the color and quality of the silicone has stayed so far (knock on wood). Overall: high recommend based on my experience so far!
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Reviewed in the United States on September 13, 2025
M
Verified Purchase
Maggie Vega
Natrona Heights, US
★★★★★ 5
Great fit!
Size: Medium, Color: (403) Washed Navy / Washed Navy / Blue Smoke
Great quality!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026

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