Manufactured by WELWYN/TT ELECTRONICS, the BCN4D121J7 is a high-performance thick film chip array resistor designed for demanding electronic applications. This product features isolated circuit configurations and robust construction suitable for various environmental conditions.
Thick film chip array resistor with isolated circuit configuration
Package size: 2112 (1206 x 4 elements)
High power rating: 125 mW @ 70°C
Voltage rating: 75 V limiting element voltage
Resistance range: 10Ω to 1MΩ
Resistance tolerance: 1%, 5%
Temperature coefficient: ±200 ppm/°C
Ambient temperature range: -55°C to +155°C
RoHS compliant (status not specified)
Electrical and Environmental Specifications
Parameter
Value
Resistor Power Rating @ 70°C
125 mW
Package Power Rating @ 70°C
500 mW
Limiting Element Voltage
75 V
Maximum Overload Voltage
188 V
Resistance Range
10Ω – 1MΩ
Resistance Tolerance
1%, 5%
Ambient Temperature Range
-55°C to +155°C
Physical Dimensions
Model
Length (mm/in)
Width (mm/in)
Height (mm/in)
Package Size
BCN4D
5.34 / 0.210
3.10 / 0.122
0.55 / 0.022
2112 (1206 x 4)
Soldering and Construction
Suitable for wave and re-flow soldering processes, with detailed pad layouts available in the datasheet. The resistor features convex and square convex terminations for reliable connections.
Note
The BCN4D121J7 is scheduled for End of Life in September 2021. All specifications are subject to change; please consult the datasheet for the most current information.
For more detailed technical data, visit the datasheet.
Disclaimer: TT Electronics reserves the right to make changes in product specifications without notice or liability. All information is considered accurate at the time of printing.
Note: The product image displayed is a standard reference image. Actual product appearance may vary. For the most accurate and up-to-date representation, we recommend searching the part number online.
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{"id":10003510264125,"title":"BCN4D121J7","handle":"bcn4d121j7","description":"\u003ch3\u003eBCN4D121J7 - Thick Film Chip Array Resistor\u003c\/h3\u003e\n\u003cp\u003eManufactured by \u003cstrong\u003eWELWYN\/TT ELECTRONICS\u003c\/strong\u003e, the \u003cstrong\u003eBCN4D121J7\u003c\/strong\u003e is a high-performance thick film chip array resistor designed for demanding electronic applications. This product features isolated circuit configurations and robust construction suitable for various environmental conditions.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e BCN4D121J7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e WELWYN\/TT ELECTRONICS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e CN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit of Measure:\u003c\/strong\u003e EA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eECCN:\u003c\/strong\u003e EAR99\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Type:\u003c\/strong\u003e REEL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDatasheet:\u003c\/strong\u003e \u003ca href=\"https:\/\/www.waldomapac.com\/productfiles\/mf-WEW\/BCN4D121J7.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eDownload Datasheet\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThick film chip array resistor with isolated circuit configuration\u003c\/li\u003e\n\u003cli\u003ePackage size: 2112 (1206 x 4 elements)\u003c\/li\u003e\n\u003cli\u003eHigh power rating: 125 mW @ 70°C\u003c\/li\u003e\n\u003cli\u003eVoltage rating: 75 V limiting element voltage\u003c\/li\u003e\n\u003cli\u003eResistance range: 10Ω to 1MΩ\u003c\/li\u003e\n\u003cli\u003eResistance tolerance: 1%, 5%\u003c\/li\u003e\n\u003cli\u003eTemperature coefficient: ±200 ppm\/°C\u003c\/li\u003e\n\u003cli\u003eAmbient temperature range: -55°C to +155°C\u003c\/li\u003e\n\u003cli\u003eRoHS compliant (status not specified)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eElectrical and Environmental Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"4\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResistor Power Rating @ 70°C\u003c\/td\u003e\n\u003ctd\u003e125 mW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage Power Rating @ 70°C\u003c\/td\u003e\n\u003ctd\u003e500 mW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Element Voltage\u003c\/td\u003e\n\u003ctd\u003e75 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Overload Voltage\u003c\/td\u003e\n\u003ctd\u003e188 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResistance Range\u003c\/td\u003e\n\u003ctd\u003e10Ω – 1MΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResistance Tolerance\u003c\/td\u003e\n\u003ctd\u003e1%, 5%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmbient Temperature Range\u003c\/td\u003e\n\u003ctd\u003e-55°C to +155°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003ePhysical Dimensions\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"4\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eLength (mm\/in)\u003c\/th\u003e\n\u003cth\u003eWidth (mm\/in)\u003c\/th\u003e\n\u003cth\u003eHeight (mm\/in)\u003c\/th\u003e\n\u003cth\u003ePackage Size\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBCN4D\u003c\/td\u003e\n\u003ctd\u003e5.34 \/ 0.210\u003c\/td\u003e\n\u003ctd\u003e3.10 \/ 0.122\u003c\/td\u003e\n\u003ctd\u003e0.55 \/ 0.022\u003c\/td\u003e\n\u003ctd\u003e2112 (1206 x 4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSoldering and Construction\u003c\/h3\u003e\n\u003cp\u003eSuitable for wave and re-flow soldering processes, with detailed pad layouts available in the datasheet. The resistor features convex and square convex terminations for reliable connections.\u003c\/p\u003e\n\u003ch3\u003eNote\u003c\/h3\u003e\n\u003cp\u003eThe BCN4D121J7 is scheduled for End of Life in September 2021. All specifications are subject to change; please consult the datasheet for the most current information.\u003c\/p\u003e\n\u003cp\u003eFor more detailed technical data, visit the \u003ca href=\"https:\/\/www.waldomapac.com\/productfiles\/mf-WEW\/BCN4D121J7.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003edatasheet\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eDisclaimer: TT Electronics reserves the right to make changes in product specifications without notice or liability. All information is considered accurate at the time of printing.\u003c\/em\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNote: The product image displayed is a standard reference image. Actual product appearance may vary. For the most accurate and up-to-date representation, we recommend searching the part number online.\u003c\/strong\u003e\u003c\/p\u003e","published_at":"2025-08-05T05:48:40+05:30","created_at":"2025-08-05T05:48:40+05:30","vendor":"Waldom Electonics","type":"","tags":["IRC-TTEL","STD_IMG","TT","WELWY-TTEL","WLDM"],"price":651,"price_min":651,"price_max":651,"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":50550642606397,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"BCN4D121J7","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"BCN4D121J7","public_title":null,"options":["Default Title"],"price":651,"weight":250,"compare_at_price":null,"inventory_management":"shopify","barcode":"BCN4D121J7","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/thinkrobotics.com\/cdn\/shop\/files\/fbe811dc-181f-41c1-ab5a-dc3410446d1d_03a565a5-bde0-4420-bcb2-af2dfa150109.jpg?v=1754353120"],"featured_image":"\/\/thinkrobotics.com\/cdn\/shop\/files\/fbe811dc-181f-41c1-ab5a-dc3410446d1d_03a565a5-bde0-4420-bcb2-af2dfa150109.jpg?v=1754353120","options":["Title"],"media":[{"alt":null,"id":45672558199101,"position":1,"preview_image":{"aspect_ratio":1.0,"height":1024,"width":1024,"src":"\/\/thinkrobotics.com\/cdn\/shop\/files\/fbe811dc-181f-41c1-ab5a-dc3410446d1d_03a565a5-bde0-4420-bcb2-af2dfa150109.jpg?v=1754353120"},"aspect_ratio":1.0,"height":1024,"media_type":"image","src":"\/\/thinkrobotics.com\/cdn\/shop\/files\/fbe811dc-181f-41c1-ab5a-dc3410446d1d_03a565a5-bde0-4420-bcb2-af2dfa150109.jpg?v=1754353120","width":1024}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ch3\u003eBCN4D121J7 - Thick Film Chip Array Resistor\u003c\/h3\u003e\n\u003cp\u003eManufactured by \u003cstrong\u003eWELWYN\/TT ELECTRONICS\u003c\/strong\u003e, the \u003cstrong\u003eBCN4D121J7\u003c\/strong\u003e is a high-performance thick film chip array resistor designed for demanding electronic applications. This product features isolated circuit configurations and robust construction suitable for various environmental conditions.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e BCN4D121J7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e WELWYN\/TT ELECTRONICS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e CN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit of Measure:\u003c\/strong\u003e EA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eECCN:\u003c\/strong\u003e EAR99\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Type:\u003c\/strong\u003e REEL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDatasheet:\u003c\/strong\u003e \u003ca href=\"https:\/\/www.waldomapac.com\/productfiles\/mf-WEW\/BCN4D121J7.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eDownload Datasheet\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThick film chip array resistor with isolated circuit configuration\u003c\/li\u003e\n\u003cli\u003ePackage size: 2112 (1206 x 4 elements)\u003c\/li\u003e\n\u003cli\u003eHigh power rating: 125 mW @ 70°C\u003c\/li\u003e\n\u003cli\u003eVoltage rating: 75 V limiting element voltage\u003c\/li\u003e\n\u003cli\u003eResistance range: 10Ω to 1MΩ\u003c\/li\u003e\n\u003cli\u003eResistance tolerance: 1%, 5%\u003c\/li\u003e\n\u003cli\u003eTemperature coefficient: ±200 ppm\/°C\u003c\/li\u003e\n\u003cli\u003eAmbient temperature range: -55°C to +155°C\u003c\/li\u003e\n\u003cli\u003eRoHS compliant (status not specified)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eElectrical and Environmental Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"4\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResistor Power Rating @ 70°C\u003c\/td\u003e\n\u003ctd\u003e125 mW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage Power Rating @ 70°C\u003c\/td\u003e\n\u003ctd\u003e500 mW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Element Voltage\u003c\/td\u003e\n\u003ctd\u003e75 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Overload Voltage\u003c\/td\u003e\n\u003ctd\u003e188 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResistance Range\u003c\/td\u003e\n\u003ctd\u003e10Ω – 1MΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResistance Tolerance\u003c\/td\u003e\n\u003ctd\u003e1%, 5%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmbient Temperature Range\u003c\/td\u003e\n\u003ctd\u003e-55°C to +155°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003ePhysical Dimensions\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"4\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eLength (mm\/in)\u003c\/th\u003e\n\u003cth\u003eWidth (mm\/in)\u003c\/th\u003e\n\u003cth\u003eHeight (mm\/in)\u003c\/th\u003e\n\u003cth\u003ePackage Size\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBCN4D\u003c\/td\u003e\n\u003ctd\u003e5.34 \/ 0.210\u003c\/td\u003e\n\u003ctd\u003e3.10 \/ 0.122\u003c\/td\u003e\n\u003ctd\u003e0.55 \/ 0.022\u003c\/td\u003e\n\u003ctd\u003e2112 (1206 x 4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSoldering and Construction\u003c\/h3\u003e\n\u003cp\u003eSuitable for wave and re-flow soldering processes, with detailed pad layouts available in the datasheet. The resistor features convex and square convex terminations for reliable connections.\u003c\/p\u003e\n\u003ch3\u003eNote\u003c\/h3\u003e\n\u003cp\u003eThe BCN4D121J7 is scheduled for End of Life in September 2021. All specifications are subject to change; please consult the datasheet for the most current information.\u003c\/p\u003e\n\u003cp\u003eFor more detailed technical data, visit the \u003ca href=\"https:\/\/www.waldomapac.com\/productfiles\/mf-WEW\/BCN4D121J7.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003edatasheet\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eDisclaimer: TT Electronics reserves the right to make changes in product specifications without notice or liability. All information is considered accurate at the time of printing.\u003c\/em\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNote: The product image displayed is a standard reference image. Actual product appearance may vary. For the most accurate and up-to-date representation, we recommend searching the part number online.\u003c\/strong\u003e\u003c\/p\u003e"}
