BOURNS SMAJ440A Transient Voltage Suppressor Diode
The BOURNS SMAJ440A is a high-performance Transient Voltage Suppressor (TVS) diode designed for circuit protection applications. It offers reliable suppression of voltage transients and ESD events, ensuring the safety and longevity of electronic systems.
Peak Forward Surge Current (8.3 ms, single half sine wave)
40 Amps
Steady State Power Dissipation @ TL = 75 °C
1.0 Watts
Maximum Instantaneous Forward Voltage @ I = 35 A PP (Unidirectional)
3.5 - 5.0 Volts
Operating Temperature Range
-55 to +150 °C
Storage Temperature Range
-55 to +150 °C
Electrical Characteristics & Ratings
Parameter
Symbol
Value
Unit
Breakdown Voltage (up to 550 V)
Min. 6.40 V, Max. 7.00 V
Volts
Working Peak Reverse Voltage
5.0 V (SMAJ5.0A)
Volts
Maximum Reverse Leakage @ VRWM
800 μA
Microamps
Maximum Clamping Voltage @ Ipp (10/1000 μs)
9.2 V (SMAJ5.0A)
Volts
Maximum Peak Pulse Current (10/1000 μs)
43.5 A (SMAJ5.0A)
Amps
Physical & Packaging Details
Package Type: SMA (DO-214AC)
Reel Packaging: Available in 13-inch or 7-inch reels
Dimensions: A (Max.) 2.70 mm, B (Min.) 2.10 mm, C (Min.) 1.27 mm
Additional Information
For detailed electrical characteristics, application notes, and handling guidelines, please refer to the datasheet.
Note: The datasheet was not processed, please search the internet for the part number for more details.
Warning: This product complies with RoHS directives. Please review the P65 Warning for health and safety information.
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":10005179695421,"title":"SMAJ440A","handle":"smaj440a","description":"\u003ch3\u003eBOURNS SMAJ440A Transient Voltage Suppressor Diode\u003c\/h3\u003e\n\n\u003cp\u003eThe BOURNS SMAJ440A is a high-performance Transient Voltage Suppressor (TVS) diode designed for circuit protection applications. It offers reliable suppression of voltage transients and ESD events, ensuring the safety and longevity of electronic systems.\u003c\/p\u003e\n\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003ePart Number: SMAJ440A\u003c\/li\u003e\n \u003cli\u003eManufacturer: BOURNS\u003c\/li\u003e\n \u003cli\u003eCountry of Origin: Taiwan (TW)\u003c\/li\u003e\n \u003cli\u003eUnit of Measure: Each (EA)\u003c\/li\u003e\n \u003cli\u003eECCN: EAR99\u003c\/li\u003e\n \u003cli\u003ePackage Type: Reel\u003c\/li\u003e\n \u003cli\u003eRoHS Compliant: Yes\u003c\/li\u003e\n \u003cli\u003eProduct Category: Circuit Protection | ESD Suppressors \/ TVS Diodes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n \u003cth\u003eElectrical Characteristics (@ TA = 25 °C)\u003c\/th\u003e\n \u003cth\u003e\u003c\/th\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003ePeak Pulse Power Dissipation (TP = 1 ms)\u003c\/td\u003e\n \u003ctd\u003e400 Watts\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003ePeak Forward Surge Current (8.3 ms, single half sine wave)\u003c\/td\u003e\n \u003ctd\u003e40 Amps\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eSteady State Power Dissipation @ TL = 75 °C\u003c\/td\u003e\n \u003ctd\u003e1.0 Watts\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eMaximum Instantaneous Forward Voltage @ I = 35 A PP (Unidirectional)\u003c\/td\u003e\n \u003ctd\u003e3.5 - 5.0 Volts\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eOperating Temperature Range\u003c\/td\u003e\n \u003ctd\u003e-55 to +150 °C\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eStorage Temperature Range\u003c\/td\u003e\n \u003ctd\u003e-55 to +150 °C\u003c\/td\u003e\n \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eElectrical Characteristics \u0026amp; Ratings\u003c\/h3\u003e\n\u003ctable\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\u003eBreakdown Voltage (up to 550 V)\u003c\/td\u003e\n \u003ctd\u003e\u003c\/td\u003e\n \u003ctd\u003eMin. 6.40 V, Max. 7.00 V\u003c\/td\u003e\n \u003ctd\u003eVolts\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eWorking Peak Reverse Voltage\u003c\/td\u003e\n \u003ctd\u003e\u003c\/td\u003e\n \u003ctd\u003e5.0 V (SMAJ5.0A)\u003c\/td\u003e\n \u003ctd\u003eVolts\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eMaximum Reverse Leakage @ VRWM\u003c\/td\u003e\n \u003ctd\u003e\u003c\/td\u003e\n \u003ctd\u003e800 μA\u003c\/td\u003e\n \u003ctd\u003eMicroamps\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eMaximum Clamping Voltage @ Ipp (10\/1000 μs)\u003c\/td\u003e\n \u003ctd\u003e\u003c\/td\u003e\n \u003ctd\u003e9.2 V (SMAJ5.0A)\u003c\/td\u003e\n \u003ctd\u003eVolts\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eMaximum Peak Pulse Current (10\/1000 μs)\u003c\/td\u003e\n \u003ctd\u003e\u003c\/td\u003e\n \u003ctd\u003e43.5 A (SMAJ5.0A)\u003c\/td\u003e\n \u003ctd\u003eAmps\u003c\/td\u003e\n \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePhysical \u0026amp; Packaging Details\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003ePackage Type: SMA (DO-214AC)\u003c\/li\u003e\n \u003cli\u003eReel Packaging: Available in 13-inch or 7-inch reels\u003c\/li\u003e\n \u003cli\u003eDimensions: A (Max.) 2.70 mm, B (Min.) 2.10 mm, C (Min.) 1.27 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAdditional Information\u003c\/h3\u003e\n\u003cp\u003eFor detailed electrical characteristics, application notes, and handling guidelines, please refer to the \u003ca href=\"https:\/\/www.waldomapac.com\/productfiles\/mf-bo\/smaj.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003edatasheet\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eNote: The datasheet was not processed, please search the internet for the part number for more details.\u003c\/p\u003e\n\n\u003cp\u003eWarning: This product complies with RoHS directives. Please review the \u003ca href=\"https:\/\/www.P65Warnings.ca.gov\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eP65 Warning\u003c\/a\u003e for health and safety information.\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":"2025-08-06T18:57:30+05:30","created_at":"2025-08-06T18:57:30+05:30","vendor":"Waldom Electonics","type":"Circuit Protection","tags":["400W","440V","BOURN","Circuit","Esd","RWM","STD_IMG","Tvs","WLDM"],"price":1802,"price_min":1802,"price_max":1802,"available":false,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":50555517567293,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"SMAJ440A","requires_shipping":true,"taxable":true,"featured_image":null,"available":false,"name":"SMAJ440A","public_title":null,"options":["Default Title"],"price":1802,"weight":250,"compare_at_price":null,"inventory_management":"shopify","barcode":"SMAJ440A","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/thinkrobotics.com\/cdn\/shop\/files\/fbe811dc-181f-41c1-ab5a-dc3410446d1d_17454a13-b6c2-4dcf-80a7-0c4c51e14a9a.jpg?v=1754486851"],"featured_image":"\/\/thinkrobotics.com\/cdn\/shop\/files\/fbe811dc-181f-41c1-ab5a-dc3410446d1d_17454a13-b6c2-4dcf-80a7-0c4c51e14a9a.jpg?v=1754486851","options":["Title"],"media":[{"alt":null,"id":45699610935613,"position":1,"preview_image":{"aspect_ratio":1.0,"height":1024,"width":1024,"src":"\/\/thinkrobotics.com\/cdn\/shop\/files\/fbe811dc-181f-41c1-ab5a-dc3410446d1d_17454a13-b6c2-4dcf-80a7-0c4c51e14a9a.jpg?v=1754486851"},"aspect_ratio":1.0,"height":1024,"media_type":"image","src":"\/\/thinkrobotics.com\/cdn\/shop\/files\/fbe811dc-181f-41c1-ab5a-dc3410446d1d_17454a13-b6c2-4dcf-80a7-0c4c51e14a9a.jpg?v=1754486851","width":1024}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ch3\u003eBOURNS SMAJ440A Transient Voltage Suppressor Diode\u003c\/h3\u003e\n\n\u003cp\u003eThe BOURNS SMAJ440A is a high-performance Transient Voltage Suppressor (TVS) diode designed for circuit protection applications. It offers reliable suppression of voltage transients and ESD events, ensuring the safety and longevity of electronic systems.\u003c\/p\u003e\n\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003ePart Number: SMAJ440A\u003c\/li\u003e\n \u003cli\u003eManufacturer: BOURNS\u003c\/li\u003e\n \u003cli\u003eCountry of Origin: Taiwan (TW)\u003c\/li\u003e\n \u003cli\u003eUnit of Measure: Each (EA)\u003c\/li\u003e\n \u003cli\u003eECCN: EAR99\u003c\/li\u003e\n \u003cli\u003ePackage Type: Reel\u003c\/li\u003e\n \u003cli\u003eRoHS Compliant: Yes\u003c\/li\u003e\n \u003cli\u003eProduct Category: Circuit Protection | ESD Suppressors \/ TVS Diodes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n \u003cth\u003eElectrical Characteristics (@ TA = 25 °C)\u003c\/th\u003e\n \u003cth\u003e\u003c\/th\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003ePeak Pulse Power Dissipation (TP = 1 ms)\u003c\/td\u003e\n \u003ctd\u003e400 Watts\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003ePeak Forward Surge Current (8.3 ms, single half sine wave)\u003c\/td\u003e\n \u003ctd\u003e40 Amps\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eSteady State Power Dissipation @ TL = 75 °C\u003c\/td\u003e\n \u003ctd\u003e1.0 Watts\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eMaximum Instantaneous Forward Voltage @ I = 35 A PP (Unidirectional)\u003c\/td\u003e\n \u003ctd\u003e3.5 - 5.0 Volts\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eOperating Temperature Range\u003c\/td\u003e\n \u003ctd\u003e-55 to +150 °C\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eStorage Temperature Range\u003c\/td\u003e\n \u003ctd\u003e-55 to +150 °C\u003c\/td\u003e\n \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eElectrical Characteristics \u0026amp; Ratings\u003c\/h3\u003e\n\u003ctable\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\u003eBreakdown Voltage (up to 550 V)\u003c\/td\u003e\n \u003ctd\u003e\u003c\/td\u003e\n \u003ctd\u003eMin. 6.40 V, Max. 7.00 V\u003c\/td\u003e\n \u003ctd\u003eVolts\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eWorking Peak Reverse Voltage\u003c\/td\u003e\n \u003ctd\u003e\u003c\/td\u003e\n \u003ctd\u003e5.0 V (SMAJ5.0A)\u003c\/td\u003e\n \u003ctd\u003eVolts\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eMaximum Reverse Leakage @ VRWM\u003c\/td\u003e\n \u003ctd\u003e\u003c\/td\u003e\n \u003ctd\u003e800 μA\u003c\/td\u003e\n \u003ctd\u003eMicroamps\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eMaximum Clamping Voltage @ Ipp (10\/1000 μs)\u003c\/td\u003e\n \u003ctd\u003e\u003c\/td\u003e\n \u003ctd\u003e9.2 V (SMAJ5.0A)\u003c\/td\u003e\n \u003ctd\u003eVolts\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003eMaximum Peak Pulse Current (10\/1000 μs)\u003c\/td\u003e\n \u003ctd\u003e\u003c\/td\u003e\n \u003ctd\u003e43.5 A (SMAJ5.0A)\u003c\/td\u003e\n \u003ctd\u003eAmps\u003c\/td\u003e\n \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePhysical \u0026amp; Packaging Details\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003ePackage Type: SMA (DO-214AC)\u003c\/li\u003e\n \u003cli\u003eReel Packaging: Available in 13-inch or 7-inch reels\u003c\/li\u003e\n \u003cli\u003eDimensions: A (Max.) 2.70 mm, B (Min.) 2.10 mm, C (Min.) 1.27 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAdditional Information\u003c\/h3\u003e\n\u003cp\u003eFor detailed electrical characteristics, application notes, and handling guidelines, please refer to the \u003ca href=\"https:\/\/www.waldomapac.com\/productfiles\/mf-bo\/smaj.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003edatasheet\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eNote: The datasheet was not processed, please search the internet for the part number for more details.\u003c\/p\u003e\n\n\u003cp\u003eWarning: This product complies with RoHS directives. Please review the \u003ca href=\"https:\/\/www.P65Warnings.ca.gov\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eP65 Warning\u003c\/a\u003e for health and safety information.\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"}
I'm particularly impressed with how carefully the header pins are packed for the RP2350-PiZero, they arrived in perfect condition without any bent pins, which has been a persistent issue with other competitors. This attention to packaging detail really stands out.
I also received the latest A4 revision of the RP2350, which shows you maintain current inventory, that's really valuable for customers who want the most up to date components.
The delivery was quick and hassle free throughout. I'll definitely be recommending you to others!
App feedback: The discounts offered through the app are a nice bonus, but the component search function could be improved to match the ease of use on the website version. The rest of the app functions work well.
