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SS24B
MDD
DIODE SCHOTTKY 40V 2A SMB
10482 Pcs New Original In Stock
Diode 40 V 2A Surface Mount SMB
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Minimum 1
5.0 / 5.0
- (399 Ratings)
SS24B
Product Overview
12997659
DiGi Electronics Part Number
SS24B-DGManufacturer
MDD
SS24B
Description
DIODE SCHOTTKY 40V 2A SMBInventory
10482 Pcs New Original In Stock
Diode 40 V 2A Surface Mount SMB
Quantity
Minimum 1
Minimum 1
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SS24B Technical Specifications
Category
Diodes, Rectifiers, Single Diodes
Packaging
Tape & Reel (TR)
Series
SMB
Product Status
Active
Technology
Schottky
Voltage - DC Reverse (Vr) (Max)
40 V
Current - Average Rectified (Io)
2A
Voltage - Forward (Vf) (Max) @ If
550 mV @ 2 A
Speed
-
Capacitance @ Vr, F
220pF @ 4V, 1MHz
Mounting Type
Surface Mount
Package / Case
DO-214AA, SMB
Supplier Device Package
SMB
Operating Temperature - Junction
-50°C ~ 125°C
Datasheet & Documents
Datasheets
Download SS24B Product Specification (PDF)
HTML Datasheet
SS24B-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
3372-SS24BTR
Standard Package
6,000
Alternative Parts
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
他們的顧客服務超越期待，處理問題速度很快！
Dec 02, 2025
Un service qui tient ses promesses, je suis très satisfait.
Dec 02, 2025
対応が素早く、丁寧で安心できました。配送も非常にスピーディでした。
Dec 02, 2025
Their support team handled my urgent request efficiently and professionally.
Dec 02, 2025
Their suppliers and logistics partners seem well-coordinated, ensuring timely deliveries.
Dec 02, 2025
The packaging materials used by DiGi Electronics are of high quality and durable.
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Frequently Asked Questions (FAQ)
What are the key thermal and layout considerations when designing in the SS24B Schottky diode for high-current switching applications, and how can I prevent localized overheating on a compact PCB?
When designing with the SS24B, prioritize thermal management due to its 2A average rectified current and 550 mV forward voltage drop at full load—this generates approximately 1.1W of heat under worst-case conditions. Use a solid ground plane beneath the SMB package and include multiple thermal vias to dissipate heat into inner or bottom layers. Ensure adequate copper pour around the anode and cathode pads (minimum 200 mm² total) to act as a heatsink. Avoid placing heat-sensitive components within 5 mm of the SS24B, and consider derating the current by 20% if ambient temperatures exceed 85°C to maintain junction temperatures below 125°C and ensure long-term reliability.
Can the SS24B safely replace a 1N5822 in a 3A boost converter, and what performance trade-offs should I expect despite both being 40V Schottky diodes?
The SS24B is not recommended as a direct replacement for the 1N5822 in a 3A continuous boost converter. While both are 40V Schottky diodes in SMB packages, the 1N5822 is rated for 3A average forward current, whereas the SS24B is limited to 2A. Operating the SS24B at 3A would push it beyond its safe operating area, leading to excessive junction temperature rise and potential thermal runaway. Even with forced airflow or oversized copper, long-term reliability will be compromised. For 3A applications, consider upgrading to a higher-current alternative like the SS34 (3A, 40V) or STPS3H100V, and revalidate efficiency and thermal performance in your specific topology.
How does the reverse leakage current of the SS24B behave at elevated temperatures, and what impact might this have on battery-powered systems operating in hot environments?
The SS24B exhibits increasing reverse leakage current with temperature—a common trait in Schottky diodes—though exact values aren't specified in the datasheet. Empirical data from similar MDD Schottky diodes suggests leakage can exceed 10 mA at 125°C reverse voltage (40V). In battery-powered systems (e.g., solar charge controllers or IoT edge devices), this elevated leakage significantly increases quiescent power loss, reducing battery life. If your application operates above 85°C ambient, consider using a diode with lower leakage, such as the Vishay VS-20MQ040-M3, or implement a bypass switch to isolate the diode during standby modes to mitigate unnecessary drain.
Is the SS24B suitable for use in a synchronous buck converter’s freewheeling path, or should I stick with ultrafast PN diodes despite its Schottky technology?
The SS24B is generally not ideal for the freewheeling diode role in synchronous buck converters where the low-side MOSFET handles conduction. In such topologies, the body diode of the MOSFET or a dedicated low-side FET is preferred due to faster reverse recovery and lower losses during dead time. While the SS24B has no reverse recovery time (a Schottky advantage), its relatively high junction capacitance (220 pF @ 4V) can contribute to switching losses and ringing at high frequencies (>500 kHz). For non-synchronous designs or low-frequency applications (<200 kHz), the SS24B can be acceptable, but always simulate or prototype to check for voltage spikes and EMI issues caused by parasitic inductance interacting with diode capacitance.
What reliability risks should I consider when using the SS24B in automotive or industrial environments with high vibration and thermal cycling, and how does its MSL rating affect assembly?
The SS24B carries an MSL 1 (Unlimited) rating, meaning it’s immune to moisture-induced failures during reflow and requires no dry packing—ideal for high-volume production. However, in automotive or industrial settings with thermal cycling (-40°C to +125°C) and mechanical vibration, long-term solder joint integrity becomes a concern. The SMB package has lower mechanical robustness compared to larger packages like SMC or TO-252. To mitigate risk, use strain-relief PCB layouts (avoid right-angle traces near pads), apply conformal coating to reduce moisture and vibration stress, and consider underfill if the application exceeds 10G vibration levels. Also, verify that your solder paste profile and reflow settings meet MDD’s recommendations to prevent voiding, which can accelerate fatigue under thermal cycling.
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.
SS24B CAD Models
MDD SS24B PCB symbols & footprints
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