Introducing the W21-R20JI, a high-quality wirewound resistor manufactured by WELWYN/TT ELECTRONICS. Designed for reliable performance in demanding electronic applications, this fixed resistor offers precise resistance values and robust construction.
Product Features
Power Rating: 3W at 25°C
Resistance: 0.2 ohms with 1% tolerance
Construction: High purity ceramic substrate with vitreous enamel coating
Terminations: Copper clad steel wire, nickel plated and solder-coated, meeting IEC 68.2.21 and IEC 115-1 standards
Package Type: T&R (Tape and Reel)
RoHS Compliant: Yes
ECCN: EAR99
Country of Origin: BB
Unit of Measure: Each (EA)
Specifications
Parameter
Details
Resistance Range
0.2 ohms (fixed)
Power Dissipation
3W at 25°C
Tolerance
1%
Construction
Wound on ceramic substrate with vitreous enamel coating
Physical Dimensions (mm)
Length: 12.7, Diameter: 5.6, Lead Diameter: 0.8
Temperature Coefficient (TCR)
Typically <+-75 ppm/°C, Max: +-200 ppm/°C
Voltage Rating
100V (limiting element voltage)
Ambient Temperature Range
-55°C to 200°C
Additional Details
Marking: Legend marked with type reference, resistance value, and tolerance in accordance with IEC 62
For more detailed specifications and application guidelines, please refer to the datasheet linked above. The datasheet was not processed; please search the internet for the part number W21-R20JI for additional information.
{"id":10049842741565,"title":"W21-R20JI","handle":"w21-r20ji-1","description":"\u003ch3\u003eWELWYN\/TT ELECTRONICS W21-R20JI Fixed Resistor Wire Wound 3W 0.2ohm\u003c\/h3\u003e\n\n\u003cp\u003eIntroducing the W21-R20JI, a high-quality wirewound resistor manufactured by WELWYN\/TT ELECTRONICS. Designed for reliable performance in demanding electronic applications, this fixed resistor offers precise resistance values and robust construction.\u003c\/p\u003e\n\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003ePower Rating: 3W at 25°C\u003c\/li\u003e\n \u003cli\u003eResistance: 0.2 ohms with 1% tolerance\u003c\/li\u003e\n \u003cli\u003eConstruction: High purity ceramic substrate with vitreous enamel coating\u003c\/li\u003e\n \u003cli\u003eTerminations: Copper clad steel wire, nickel plated and solder-coated, meeting IEC 68.2.21 and IEC 115-1 standards\u003c\/li\u003e\n \u003cli\u003ePackage Type: T\u0026amp;R (Tape and Reel)\u003c\/li\u003e\n \u003cli\u003eRoHS Compliant: Yes\u003c\/li\u003e\n \u003cli\u003eECCN: EAR99\u003c\/li\u003e\n \u003cli\u003eCountry of Origin: BB\u003c\/li\u003e\n \u003cli\u003eUnit of Measure: Each (EA)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n \u003cth\u003eParameter\u003c\/th\u003e\n \u003cth\u003eDetails\u003c\/th\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eResistance Range\u003c\/td\u003e\n \u003ctd\u003e0.2 ohms (fixed)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003ePower Dissipation\u003c\/td\u003e\n \u003ctd\u003e3W at 25°C\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eTolerance\u003c\/td\u003e\n \u003ctd\u003e1%\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eConstruction\u003c\/td\u003e\n \u003ctd\u003eWound on ceramic substrate with vitreous enamel coating\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003ePhysical Dimensions (mm)\u003c\/td\u003e\n \u003ctd\u003eLength: 12.7, Diameter: 5.6, Lead Diameter: 0.8\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eTemperature Coefficient (TCR)\u003c\/td\u003e\n \u003ctd\u003eTypically \u0026lt;+-75 ppm\/°C, Max: +-200 ppm\/°C\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eVoltage Rating\u003c\/td\u003e\n \u003ctd\u003e100V (limiting element voltage)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eAmbient Temperature Range\u003c\/td\u003e\n \u003ctd\u003e-55°C to 200°C\u003c\/td\u003e\n \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eAdditional Details\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003eMarking: Legend marked with type reference, resistance value, and tolerance in accordance with IEC 62\u003c\/li\u003e\n \u003cli\u003eDatasheet: \u003ca href=\"https:\/\/www.waldomapac.com\/upload\/parts\/datasheets\/mf-wew\/wew-w21-r20ji.pdf\" target=\"_blank\"\u003eDownload Datasheet\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor more detailed specifications and application guidelines, please refer to the datasheet linked above. The datasheet was not processed; please search the internet for the part number W21-R20JI for additional information.\u003c\/p\u003e","published_at":"2025-09-05T00:35:23+05:30","created_at":"2025-09-05T00:35:23+05:30","vendor":"Waldom Electonics","type":"Resistors","tags":["3W","Resistors","WELWY-TTEL","Wire","WLDM"],"price":8454,"price_min":8454,"price_max":8454,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":50708975419709,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"W21-R20JI","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"W21-R20JI","public_title":null,"options":["Default Title"],"price":8454,"weight":250,"compare_at_price":null,"inventory_management":"shopify","barcode":"W21-R20JI","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/thinkrobotics.com\/cdn\/shop\/files\/W21-R20JI_53525731_1b2d7c05.jpg?v=1757012723"],"featured_image":"\/\/thinkrobotics.com\/cdn\/shop\/files\/W21-R20JI_53525731_1b2d7c05.jpg?v=1757012723","options":["Title"],"media":[{"alt":null,"id":46198207250749,"position":1,"preview_image":{"aspect_ratio":1.515,"height":200,"width":303,"src":"\/\/thinkrobotics.com\/cdn\/shop\/files\/W21-R20JI_53525731_1b2d7c05.jpg?v=1757012723"},"aspect_ratio":1.515,"height":200,"media_type":"image","src":"\/\/thinkrobotics.com\/cdn\/shop\/files\/W21-R20JI_53525731_1b2d7c05.jpg?v=1757012723","width":303}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ch3\u003eWELWYN\/TT ELECTRONICS W21-R20JI Fixed Resistor Wire Wound 3W 0.2ohm\u003c\/h3\u003e\n\n\u003cp\u003eIntroducing the W21-R20JI, a high-quality wirewound resistor manufactured by WELWYN\/TT ELECTRONICS. Designed for reliable performance in demanding electronic applications, this fixed resistor offers precise resistance values and robust construction.\u003c\/p\u003e\n\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003ePower Rating: 3W at 25°C\u003c\/li\u003e\n \u003cli\u003eResistance: 0.2 ohms with 1% tolerance\u003c\/li\u003e\n \u003cli\u003eConstruction: High purity ceramic substrate with vitreous enamel coating\u003c\/li\u003e\n \u003cli\u003eTerminations: Copper clad steel wire, nickel plated and solder-coated, meeting IEC 68.2.21 and IEC 115-1 standards\u003c\/li\u003e\n \u003cli\u003ePackage Type: T\u0026amp;R (Tape and Reel)\u003c\/li\u003e\n \u003cli\u003eRoHS Compliant: Yes\u003c\/li\u003e\n \u003cli\u003eECCN: EAR99\u003c\/li\u003e\n \u003cli\u003eCountry of Origin: BB\u003c\/li\u003e\n \u003cli\u003eUnit of Measure: Each (EA)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n \u003cth\u003eParameter\u003c\/th\u003e\n \u003cth\u003eDetails\u003c\/th\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eResistance Range\u003c\/td\u003e\n \u003ctd\u003e0.2 ohms (fixed)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003ePower Dissipation\u003c\/td\u003e\n \u003ctd\u003e3W at 25°C\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eTolerance\u003c\/td\u003e\n \u003ctd\u003e1%\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eConstruction\u003c\/td\u003e\n \u003ctd\u003eWound on ceramic substrate with vitreous enamel coating\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003ePhysical Dimensions (mm)\u003c\/td\u003e\n \u003ctd\u003eLength: 12.7, Diameter: 5.6, Lead Diameter: 0.8\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eTemperature Coefficient (TCR)\u003c\/td\u003e\n \u003ctd\u003eTypically \u0026lt;+-75 ppm\/°C, Max: +-200 ppm\/°C\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eVoltage Rating\u003c\/td\u003e\n \u003ctd\u003e100V (limiting element voltage)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eAmbient Temperature Range\u003c\/td\u003e\n \u003ctd\u003e-55°C to 200°C\u003c\/td\u003e\n \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eAdditional Details\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003eMarking: Legend marked with type reference, resistance value, and tolerance in accordance with IEC 62\u003c\/li\u003e\n \u003cli\u003eDatasheet: \u003ca href=\"https:\/\/www.waldomapac.com\/upload\/parts\/datasheets\/mf-wew\/wew-w21-r20ji.pdf\" target=\"_blank\"\u003eDownload Datasheet\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor more detailed specifications and application guidelines, please refer to the datasheet linked above. The datasheet was not processed; please search the internet for the part number W21-R20JI for additional information.\u003c\/p\u003e"}
