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EP05DA40
KYOCERA AVX
DIODE GEN PURP 400V 500MA SOD123
3164 Pcs New Original In Stock
Diode 400 V 500mA Surface Mount SOD-123
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Minimum 1
5.0 / 5.0
- (48 Ratings)
EP05DA40
Product Overview
12937204
DiGi Electronics Part Number
EP05DA40-DGManufacturer
KYOCERA AVX
EP05DA40
Description
DIODE GEN PURP 400V 500MA SOD123Inventory
3164 Pcs New Original In Stock
Diode 400 V 500mA Surface Mount SOD-123
Quantity
Minimum 1
Minimum 1
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EP05DA40 Technical Specifications
Category
Diodes, Rectifiers, Single Diodes
Packaging
-
Series
-
Product Status
Obsolete
Technology
Standard
Voltage - DC Reverse (Vr) (Max)
400 V
Current - Average Rectified (Io)
500mA
Voltage - Forward (Vf) (Max) @ If
1.1 V @ 500 mA
Speed
Standard Recovery >500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr
10 µA @ 400 V
Capacitance @ Vr, F
-
Mounting Type
Surface Mount
Package / Case
SOD-123
Supplier Device Package
SOD-123
Operating Temperature - Junction
-40°C ~ 150°C
Datasheet & Documents
HTML Datasheet
EP05DA40-DG
Environmental & Export Classification
Moisture Sensitivity Level (MSL)
1 (Unlimited)
ECCN
EAR99
HTSUS
8541.10.0070
Additional Information
Other Names
478-EP05DA40
1253-EP05DA40TR
1253-EP05DA40TR-DG
Standard Package
3,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
문제 해결이 이렇게 빠를 수 있다는 것이 놀라웠어요. 믿을 만한 곳입니다.
Dec 02, 2025
他們的售後團隊非常專業，無論任何問題都能在短時間內得到妥善處理。
Dec 02, 2025
價格親民又友善的服務，讓我在這裡找到許多經濟實惠的電子用品。
Dec 02, 2025
Bei DiGi Electronics ist die Kundenzufriedenheit offensichtlich altas Ziel, besonders durch günstige Preise.
Dec 02, 2025
I highly recommend DiGi Electronics for their pricing advantages and reliable packaging.
Dec 02, 2025
The quality of their packaging reassures me that the products are handled with care.
Dec 02, 2025
Their website's ease of use makes me confident in every purchase I make.
Dec 02, 2025
The professionalism of Di Digi Electronics’ customer service is truly commendable.
Dec 02, 2025
Delivery arrived faster than I expected. The prices are very accessible for hobbyists.
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Frequently Asked Questions (FAQ)
Can I still use the EP05DA40 diode in new designs despite its obsolete status, and what are the risks of doing so?
Using the EP05DA40 in new designs is not recommended due to its obsolete status from KYOCERA AVX, which indicates discontinued production and lack of future support. This increases long-term supply chain risks, especially for high-volume or safety-critical applications. If you proceed, ensure you secure sufficient lifetime inventory and validate drop-in replacements early—consider alternatives like the Vishay US1G (400V, 1A, SOD-123) or Diodes Incorporated B140-E3 (400V, 1A, SOD-123), which offer higher current ratings and active status for better longevity and reliability.
What are the thermal and layout considerations when replacing the EP05DA40 with a higher-current diode like the US1G in a compact SOD-123 footprint?
Although the EP05DA40 and Vishay US1G share the same SOD-123 package, the US1G’s higher average rectified current (1A vs. 500mA) generates more heat under load. Ensure adequate copper pour area on the PCB—extend the cathode pad with a thermal relief-connected pour to improve heat dissipation. Avoid placing thermally sensitive components nearby, and verify junction temperature stays within limits using Tj = Ta + (Pd × RθJA). Without proper layout, the replacement may overheat despite higher nominal specs, leading to premature failure.
Is the EP05DA40 suitable for flyback or snubber circuits in offline AC-DC converters operating near 400V reverse voltage?
The EP05DA40 is marginal for flyback or snubber applications near its 400V reverse rating due to limited voltage margin and standard recovery speed (>500ns). In high-frequency or high-spike environments, voltage transients can exceed 400V, risking avalanche breakdown. For reliable operation, use a diode with at least 20–30% voltage derating—consider fast-recovery alternatives like the ON Semiconductor MURS140 (400V, 1A, <500ns) in SOD-123. If you must use the EP05DA40, add an RC snubber and ensure input surge protection to clamp transients below 350V.
How does reverse leakage current of the EP05DA40 impact low-power standby circuits, and could it cause unintended behavior in battery-powered systems?
With a reverse leakage of 10 µA @ 400V, the EP05DA40 may contribute significantly to quiescent current in battery-powered or low-standby-power designs. In a 400V bias condition, this leakage alone consumes ~4mW, which can drain small batteries over time or affect precision voltage references. For ultra-low-power applications, consider low-leakage alternatives such as the Nexperea PMEG4010CEJ (40V, but usable in lower-voltage sections) or evaluate whether the circuit can tolerate the leakage through system-level power budgeting—otherwise, select a diode with <1 µA leakage.
Can I parallel two EP05DA40 diodes to increase current handling in a 1A rectification application, and what are the failure risks?
Paralleling two EP05DA40 diodes to achieve 1A total current is not advisable due to inherent forward voltage mismatch and lack of current sharing. Even small Vf differences cause one diode to carry disproportionately more current, leading to thermal runaway and early failure. The SOD-123 package also limits heat dissipation, exacerbating imbalance. Instead of paralleling, select a single diode rated for the full load—such as the STMicroelectronics STPS1H100A (1A, 100V, SOD-123) or the previously mentioned US1G—to ensure reliable, balanced operation and avoid field failures from uneven current distribution.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
EP05DA40 CAD Models
KYOCERA AVX EP05DA40 PCB symbols & footprints
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