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DSK34
MDD
DIODE SCHOTTKY 40V 3A SOD123FL
17360 Pcs New Original In Stock
Diode 40 V 3A Surface Mount SOD-123FL
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Minimum 1
5.0 / 5.0
- (472 Ratings)
DSK34
Product Overview
12974911
DiGi Electronics Part Number
DSK34-DGManufacturer
MDD
DSK34
Description
DIODE SCHOTTKY 40V 3A SOD123FLInventory
17360 Pcs New Original In Stock
Diode 40 V 3A Surface Mount SOD-123FL
Quantity
Minimum 1
Minimum 1
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DSK34 Technical Specifications
Category
Diodes, Rectifiers, Single Diodes
Packaging
Tape & Reel (TR)
Series
-
Product Status
Active
Technology
Schottky
Voltage - DC Reverse (Vr) (Max)
40 V
Current - Average Rectified (Io)
3A
Voltage - Forward (Vf) (Max) @ If
550 mV @ 3 A
Speed
Fast Recovery =< 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr
500 µA @ 40 V
Capacitance @ Vr, F
250pF @ 4V, 1MHz
Mounting Type
Surface Mount
Package / Case
SOD-123F
Supplier Device Package
SOD-123FL
Operating Temperature - Junction
-55°C ~ 125°C
Datasheet & Documents
Datasheets
Download DSK34 Product Specification (PDF)
HTML Datasheet
DSK34-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
SOD123FK34S304
3372-DSK34TR
Standard Package
6,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Leur souci constant de la qualité et leur respect des délais m’aide à optimiser mon flux de travail.
Dec 02, 2025
DiGi Electronics' focus on affordability and customer service makes them a standout company.
Dec 02, 2025
DiGi Electronics' after-sales support is a major reason we continue working with them.
Dec 02, 2025
I rely on DiGi Electronics for affordable and trustworthy electronics.
Dec 02, 2025
The product quality exceeded my expectations, with durable materials and a sleek finish that feels premium.
Dec 02, 2025
Excellent communication and follow-up from DiGi carry through from order placement to after-sales support.
Dec 02, 2025
I’m always confident in their products' durability and affordability.
Dec 02, 2025
The delivery packaging was impressive, and the product’s longevity is clear from its solid construction.
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Frequently Asked Questions (FAQ)
What are the thermal design considerations when using the DSK34 in a high-temperature environment near its 125°C junction limit in a compact SOD-123FL package?
When operating the DSK34 near its maximum junction temperature of 125°C, adequate PCB copper layout is critical for heat dissipation, especially in enclosed or high-ambient temperature environments. The SOD-123FL package has limited thermal mass, so we recommend using at least 15–20 mm² of solid copper pad connected to both anode and cathode traces to act as a heat spreader. Avoid placing the DSK34 near other heat-generating components and consider derating the forward current above 85°C ambient. For sustained loads near 3A, thermal simulation or in-situ measurement with a thermal camera is advised to prevent premature degradation or thermal runaway due to positive temperature coefficient of leakage current in Schottky diodes.
Can the DSK34 reliably replace a SS34 Schottky diode in a 5V USB power path design, and what are the key differences to check?
Yes, the DSK34 can be a viable drop-in replacement for the SS34 in a 5V USB power path, but key checks are necessary. Both offer 40V / 3A ratings and SOD-123FL packages, but the DSK34’s 550 mV forward voltage at 3A is competitive and may reduce conduction losses slightly. However, verify that the DSK34’s reverse leakage (500 µA @ 40 V) is acceptable in your standby or disconnect mode—this is higher than some low-leakage alternatives and could affect battery drain in always-connected USB devices. Also confirm that your PCB footprint matches the SOD-123FL exactly, as some vendors use slightly different molds. Always validate under real load and temperature conditions.
How does the 250pF capacitance of the DSK34 at 4V affect its performance in high-frequency switching circuits like 1 MHz DC-DC converters?
The 250pF capacitance of the DSK34 at 4V can introduce significant switching losses and resonant effects in high-frequency DC-DC converters operating at or above 1 MHz. In such designs, this capacitance increases charge/discharge current during transitions, reducing efficiency and potentially causing ringing with PCB trace inductance. For hard-switched topologies, consider using lower-capacitance Schottky diodes (e.g., 100–150pF) or alternative solutions like synchronous rectification with MOSFETs. If using the DSK34, minimize trace lengths, use tight gate loops, and simulate the switch node behavior to ensure EMI compliance and thermal stability under full load.
Is the DSK34 suitable for reverse polarity protection in automotive 12V systems, and what failure risks should be considered?
The DSK34 can be used for reverse polarity protection in 12V automotive systems, but with caution. Its 40V reverse rating is sufficient for nominal 12V systems (which can reach 24V during jump-starts), but lacks headroom for load dump transients (>40V) unless paired with a transient voltage suppressor (TVS). Additionally, at 3A continuous current, self-heating in the SOD-123FL package may require thermal derating—consider fusing and current limiting to prevent thermal failure under fault conditions. The relatively high 500 µA leakage at 40V is not typically an issue here, but long-term reliability under thermal cycling (-40°C to 125°C) should be verified with accelerated life testing, especially in under-hood environments.
What are the reliability risks of using the DSK34 instead of a higher-voltage Schottky like the SB540 (50V) in a 24V industrial power supply?
Using the DSK34 in a 24V system pushes its 40V reverse rating close to the operational limit, creating reliability risks during voltage surges or transients. While nominal 24V systems typically stay below 30V, faults or inductive kickbacks can exceed 40V, triggering breakdown and potential catastrophic failure due to the Schottky’s soft reverse characteristic. The SB540 (50V) offers better margin and is designed for such industrial environments. If using the DSK34, implement overvoltage clamping (e.g., TVS diode) and ensure input filtering. Avoid this substitution in high-reliability or unattended systems where field failure could result in downtime or safety issues.
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.
DSK34 CAD Models
MDD DSK34 PCB symbols & footprints
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