The STS321240B100 is a high-performance TVS diode ESD suppressor manufactured by EATON ELECTRONICS. Designed to protect sensitive electronic components from electrostatic discharge (ESD) and lightning-induced transients, this device ensures reliable operation in various electronic applications.
Key Features
Protects one bi-directional I/O line
Low clamping voltage for effective ESD suppression
Low leakage current to minimize power loss
Meets moisture sensitivity level (MSL) 3
Molding compound with UL 94V-0 flammability rating
Termination finish: Tin
Electrical and Mechanical Specifications
Parameter
Symbol
Value
Unit
Peak pulse power dissipation (8/20 μs waveform)
Ppp
350
W
Reverse working voltage
RWM
24
V
Reverse breakdown voltage (IT=1mA)
VBR
26.7
V
Reverse leakage current (VRWM=24V)
IR
1
μA
Clamping voltage (IPP=1A, 8/20 μs)
VC
38
V
Junction capacitance (VRWM=0V, f=1MHz)
CJ
1.0 - 1.5
pF
Environmental and Handling Specifications
Soldering temperature: +260°C (10 seconds)
Operating junction temperature: -55°C to +125°C
Storage temperature: -55°C to +150°C
Meets IEC61000-4-2 (ESD) up to ±30 kV (air/contact)
Lightning surge protection up to 20A (8/20 μs waveform)
Package and Packaging
Package Type: T&R (Tape & Reel)
Quantity: 3,000 parts per reel
Part dimensions and pad layout are available in the datasheet
{"id":10027959124285,"title":"STS321240B100","handle":"sts321240b100","description":"\u003ch3\u003eProduct Description: EATON ELECTRONICS TVS ESD Suppressor - Part Number: STS321240B100\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eSTS321240B100\u003c\/strong\u003e is a high-performance TVS diode ESD suppressor manufactured by \u003cstrong\u003eEATON ELECTRONICS\u003c\/strong\u003e. Designed to protect sensitive electronic components from electrostatic discharge (ESD) and lightning-induced transients, this device ensures reliable operation in various electronic applications.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003eProtects one bi-directional I\/O line\u003c\/li\u003e\n \u003cli\u003eLow clamping voltage for effective ESD suppression\u003c\/li\u003e\n \u003cli\u003eLow leakage current to minimize power loss\u003c\/li\u003e\n \u003cli\u003eMeets moisture sensitivity level (MSL) 3\u003c\/li\u003e\n \u003cli\u003eMolding compound with UL 94V-0 flammability rating\u003c\/li\u003e\n \u003cli\u003eTermination finish: Tin\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eElectrical and Mechanical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"5\" cellspacing=\"0\"\u003e\n \u003ctr\u003e\n \u003cth\u003eParameter\u003c\/th\u003e\n \u003cth\u003eSymbol\u003c\/th\u003e\n \u003cth\u003eValue\u003c\/th\u003e\n \u003cth\u003eUnit\u003c\/th\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003ePeak pulse power dissipation (8\/20 μs waveform)\u003c\/td\u003e\n \u003ctd\u003eP\u003csub\u003epp\u003c\/sub\u003e\n\u003c\/td\u003e\n \u003ctd\u003e350\u003c\/td\u003e\n \u003ctd\u003eW\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eReverse working voltage\u003c\/td\u003e\n \u003ctd\u003eR\u003csub\u003eWM\u003c\/sub\u003e\n\u003c\/td\u003e\n \u003ctd\u003e24\u003c\/td\u003e\n \u003ctd\u003eV\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eReverse breakdown voltage (I\u003csub\u003eT\u003c\/sub\u003e=1mA)\u003c\/td\u003e\n \u003ctd\u003eV\u003csub\u003eBR\u003c\/sub\u003e\n\u003c\/td\u003e\n \u003ctd\u003e26.7\u003c\/td\u003e\n \u003ctd\u003eV\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eReverse leakage current (V\u003csub\u003eRWM\u003c\/sub\u003e=24V)\u003c\/td\u003e\n \u003ctd\u003eI\u003csub\u003eR\u003c\/sub\u003e\n\u003c\/td\u003e\n \u003ctd\u003e1\u003c\/td\u003e\n \u003ctd\u003eμA\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eClamping voltage (I\u003csub\u003ePP\u003c\/sub\u003e=1A, 8\/20 μs)\u003c\/td\u003e\n \u003ctd\u003eV\u003csub\u003eC\u003c\/sub\u003e\n\u003c\/td\u003e\n \u003ctd\u003e38\u003c\/td\u003e\n \u003ctd\u003eV\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eJunction capacitance (V\u003csub\u003eRWM\u003c\/sub\u003e=0V, f=1MHz)\u003c\/td\u003e\n \u003ctd\u003eC\u003csub\u003eJ\u003c\/sub\u003e\n\u003c\/td\u003e\n \u003ctd\u003e1.0 - 1.5\u003c\/td\u003e\n \u003ctd\u003epF\u003c\/td\u003e\n \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eEnvironmental and Handling Specifications\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003eSoldering temperature: +260°C (10 seconds)\u003c\/li\u003e\n \u003cli\u003eOperating junction temperature: -55°C to +125°C\u003c\/li\u003e\n \u003cli\u003eStorage temperature: -55°C to +150°C\u003c\/li\u003e\n \u003cli\u003eMeets IEC61000-4-2 (ESD) up to ±30 kV (air\/contact)\u003c\/li\u003e\n \u003cli\u003eLightning surge protection up to 20A (8\/20 μs waveform)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage and Packaging\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003ePackage Type: T\u0026amp;R (Tape \u0026amp; Reel)\u003c\/li\u003e\n \u003cli\u003eQuantity: 3,000 parts per reel\u003c\/li\u003e\n \u003cli\u003ePart dimensions and pad layout are available in the datasheet\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAdditional Information\u003c\/h3\u003e\n\u003cp\u003eFor detailed technical data, download the datasheet here: \u003ca href=\"https:\/\/www.eaton.com\/content\/dam\/eaton\/products\/electronic-components\/resources\/data-sheet\/eaton-sts321xxxbxx0-tvs-diode-esd-suppressor-data-sheet.pdf\"\u003eEaton STS321XXXBXX0 Datasheet\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003ePart Number: \u003cstrong\u003eSTS321240B100\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eManufacturer: \u003cstrong\u003eEATON ELECTRONICS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCountry of Origin: \u003cstrong\u003eCN\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUnit of Measure: \u003cstrong\u003eEA\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eECCN: \u003cem\u003eNot specified\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003ePackage Type: \u003cstrong\u003eT\u0026amp;R\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eNote: The datasheet was not processed; please search the internet for the part number for more details.\u003c\/em\u003e\u003c\/p\u003e\u003cbr\u003e","published_at":"2025-08-16T05:13:18+05:30","created_at":"2025-08-16T05:13:18+05:30","vendor":"Waldom Electonics","type":"","tags":["24 V","EATON-ELE","IMPORT_CSV","IMPORT_PT2","TVS","WLDM"],"price":1136,"price_min":1136,"price_max":1136,"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":50626353430845,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"STS321240B100","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"STS321240B100","public_title":null,"options":["Default Title"],"price":1136,"weight":250,"compare_at_price":null,"inventory_management":"shopify","barcode":"STS321240B100","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/thinkrobotics.com\/cdn\/shop\/files\/54934050.jpg?v=1755301401"],"featured_image":"\/\/thinkrobotics.com\/cdn\/shop\/files\/54934050.jpg?v=1755301401","options":["Title"],"media":[{"alt":null,"id":45862452756797,"position":1,"preview_image":{"aspect_ratio":1.0,"height":420,"width":420,"src":"\/\/thinkrobotics.com\/cdn\/shop\/files\/54934050.jpg?v=1755301401"},"aspect_ratio":1.0,"height":420,"media_type":"image","src":"\/\/thinkrobotics.com\/cdn\/shop\/files\/54934050.jpg?v=1755301401","width":420}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ch3\u003eProduct Description: EATON ELECTRONICS TVS ESD Suppressor - Part Number: STS321240B100\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eSTS321240B100\u003c\/strong\u003e is a high-performance TVS diode ESD suppressor manufactured by \u003cstrong\u003eEATON ELECTRONICS\u003c\/strong\u003e. Designed to protect sensitive electronic components from electrostatic discharge (ESD) and lightning-induced transients, this device ensures reliable operation in various electronic applications.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003eProtects one bi-directional I\/O line\u003c\/li\u003e\n \u003cli\u003eLow clamping voltage for effective ESD suppression\u003c\/li\u003e\n \u003cli\u003eLow leakage current to minimize power loss\u003c\/li\u003e\n \u003cli\u003eMeets moisture sensitivity level (MSL) 3\u003c\/li\u003e\n \u003cli\u003eMolding compound with UL 94V-0 flammability rating\u003c\/li\u003e\n \u003cli\u003eTermination finish: Tin\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eElectrical and Mechanical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"5\" cellspacing=\"0\"\u003e\n \u003ctr\u003e\n \u003cth\u003eParameter\u003c\/th\u003e\n \u003cth\u003eSymbol\u003c\/th\u003e\n \u003cth\u003eValue\u003c\/th\u003e\n \u003cth\u003eUnit\u003c\/th\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003ePeak pulse power dissipation (8\/20 μs waveform)\u003c\/td\u003e\n \u003ctd\u003eP\u003csub\u003epp\u003c\/sub\u003e\n\u003c\/td\u003e\n \u003ctd\u003e350\u003c\/td\u003e\n \u003ctd\u003eW\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eReverse working voltage\u003c\/td\u003e\n \u003ctd\u003eR\u003csub\u003eWM\u003c\/sub\u003e\n\u003c\/td\u003e\n \u003ctd\u003e24\u003c\/td\u003e\n \u003ctd\u003eV\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eReverse breakdown voltage (I\u003csub\u003eT\u003c\/sub\u003e=1mA)\u003c\/td\u003e\n \u003ctd\u003eV\u003csub\u003eBR\u003c\/sub\u003e\n\u003c\/td\u003e\n \u003ctd\u003e26.7\u003c\/td\u003e\n \u003ctd\u003eV\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eReverse leakage current (V\u003csub\u003eRWM\u003c\/sub\u003e=24V)\u003c\/td\u003e\n \u003ctd\u003eI\u003csub\u003eR\u003c\/sub\u003e\n\u003c\/td\u003e\n \u003ctd\u003e1\u003c\/td\u003e\n \u003ctd\u003eμA\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eClamping voltage (I\u003csub\u003ePP\u003c\/sub\u003e=1A, 8\/20 μs)\u003c\/td\u003e\n \u003ctd\u003eV\u003csub\u003eC\u003c\/sub\u003e\n\u003c\/td\u003e\n \u003ctd\u003e38\u003c\/td\u003e\n \u003ctd\u003eV\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eJunction capacitance (V\u003csub\u003eRWM\u003c\/sub\u003e=0V, f=1MHz)\u003c\/td\u003e\n \u003ctd\u003eC\u003csub\u003eJ\u003c\/sub\u003e\n\u003c\/td\u003e\n \u003ctd\u003e1.0 - 1.5\u003c\/td\u003e\n \u003ctd\u003epF\u003c\/td\u003e\n \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eEnvironmental and Handling Specifications\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003eSoldering temperature: +260°C (10 seconds)\u003c\/li\u003e\n \u003cli\u003eOperating junction temperature: -55°C to +125°C\u003c\/li\u003e\n \u003cli\u003eStorage temperature: -55°C to +150°C\u003c\/li\u003e\n \u003cli\u003eMeets IEC61000-4-2 (ESD) up to ±30 kV (air\/contact)\u003c\/li\u003e\n \u003cli\u003eLightning surge protection up to 20A (8\/20 μs waveform)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage and Packaging\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003ePackage Type: T\u0026amp;R (Tape \u0026amp; Reel)\u003c\/li\u003e\n \u003cli\u003eQuantity: 3,000 parts per reel\u003c\/li\u003e\n \u003cli\u003ePart dimensions and pad layout are available in the datasheet\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAdditional Information\u003c\/h3\u003e\n\u003cp\u003eFor detailed technical data, download the datasheet here: \u003ca href=\"https:\/\/www.eaton.com\/content\/dam\/eaton\/products\/electronic-components\/resources\/data-sheet\/eaton-sts321xxxbxx0-tvs-diode-esd-suppressor-data-sheet.pdf\"\u003eEaton STS321XXXBXX0 Datasheet\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003ePart Number: \u003cstrong\u003eSTS321240B100\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eManufacturer: \u003cstrong\u003eEATON ELECTRONICS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCountry of Origin: \u003cstrong\u003eCN\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUnit of Measure: \u003cstrong\u003eEA\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eECCN: \u003cem\u003eNot specified\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003ePackage Type: \u003cstrong\u003eT\u0026amp;R\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eNote: The datasheet was not processed; please search the internet for the part number for more details.\u003c\/em\u003e\u003c\/p\u003e\u003cbr\u003e"}
