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Diodes Incorporated SDM20U30-7
- Part No.:
- SDM20U30-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
SDM20U30-7.pdf
- Description:
- DIODE SCHOTTKY 30V 200MA SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:8,392
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Product details
Overview
SDM20U30 from Diodes Incorporated is a surface-mount Schottky barrier diode rated for 30 V peak reverse voltage and 200 mA average rectified output current, featuring ultra-low forward voltage (0.35 V at 20 mA) and negligible reverse recovery time. It is used in space-constrained DC-DC converter outputs and USB power path protection in portable electronics.
For engineers reviewing the SDM20U30 datasheet, SDM20U30 pinout, SDM20U30 application, or SDM20U30 equivalent, key selection criteria include forward voltage at 200 mA, junction-to-ambient thermal resistance (240 °C/W on 1-inch² copper), reverse leakage at 30 V (150 µA), capacitance at 0 V (20 pF), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Schottky diode employs guard ring construction to enhance transient immunity and suppress avalanche-induced failure under repetitive surge conditions. Its low 0.35 V VF at 20 mA and 20 pF CT at 0 V enable high-efficiency, low-noise operation in high-frequency switching paths.
The SOD523 package delivers minimal parasitic inductance and thermal resistance-240 °C/W on 1-inch² 2 oz copper-supporting stable performance up to +125 °C ambient. Reverse breakdown is guaranteed at ≥30 V with IR ≤ 150 µA at VR = 30 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - Maximum non-repetitive reverse voltage before breakdown; sets safe operating limit in clamping or blocking applications |
| IO | 200 mA - Continuous DC current handling on FR-4 PCB with recommended pad layout; defines usable output stage capacity |
| VF @ 20 mA | 0.35 V - Forward drop determining conduction loss and self-heating in 5 V or 3.3 V rail OR-ing circuits |
| IR @ 30 V | 150 µA - Reverse leakage defining dark-current error in precision sensing or battery hold-up paths |
| CT @ 0 V | 20 pF - Junction capacitance limiting high-frequency noise coupling and signal integrity in RF-adjacent layouts |
| RθJA | 240 °C/W - Thermal resistance on 1-inch² 2 oz copper; enables 150 mW dissipation up to +85 °C ambient without derating |
| TJ Range | –65 to +125 °C - Operating junction temperature span supporting automotive cabin and industrial control environments |
Pinout & Package
Package: SOD523 - ultra-small surface-mount plastic case (1.6 × 0.8 × 0.6 mm), molded with halogen/antimony-free green compound, UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to higher-potential node (e.g., input rail or switch node); no internal series resistance added |
| Cathode | Forward current exit / reverse blocking terminal | Marked with cathode band; ties to lower-potential node (e.g., ground or output rail); blocks up to 30 V reverse |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring construction | Suppresses edge breakdown during ESD or load dump transients, improving robustness in automotive power rails |
| Negligible reverse recovery time | Eliminates switching tail current and associated losses in >1 MHz DC-DC converters |
| Low forward voltage (0.35 V @ 20 mA) | Reduces conduction loss by >40% vs. standard silicon diodes, extending battery runtime in portable devices |
| AEC-Q101 qualified | Validated for automotive applications including body control modules and infotainment power supplies |
| Halogen & antimony free ("Green") | Meets IEC 61249-2-21:2011 requirements with Br+Cl < 1500 ppm and Sb < 1000 ppm |
Applications
| USB Power Path Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Prevents backfeed from downstream USB peripherals into host power when VBUS is absent. IC Role / Device Role / Timing Role: OR-ing diode in 5 V power path; blocks reverse current while passing forward current with minimal drop. Use Value: 0.35 V VF at 200 mA limits voltage loss to <7%, preserving USB 2.0 compliance and enabling compact layout in thin mobile accessories. | Use Scenario: Clamps inductive kickback from door lock actuators and mirror motors during PWM switching. IC Role / Device Role / Timing Role: Freewheeling diode across 12 V inductive loads; absorbs energy with <10 ns recovery. Use Value: Guard ring design withstands 100 V/µs transients per AEC-Q101 stress tests, preventing latch-up in 12 V microcontroller I/O drivers. |
| Portable Device Battery Charging | Industrial Sensor Node Power Supply |
Use Scenario: Isolates primary Li-ion charger output from backup coin-cell supply in wearables. IC Role / Device Role / Timing Role: Reverse-blocking diode in dual-supply OR-ing network; ensures priority charging path. Use Value: 150 µA IR at 30 V prevents measurable self-discharge of coin cell over 6-month shelf life. | Use Scenario: Rectifies AC-coupled signal conditioning output in 4–20 mA loop-powered sensors. IC Role / Device Role / Timing Role: Signal-path Schottky detector diode; converts AC envelope to DC with minimal distortion. Use Value: 20 pF CT minimizes phase shift below 100 kHz, preserving loop stability and measurement accuracy within ±0.1% FSR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RB520S-30T2R | Same 30 V VRRM, but VF = 0.37 V @ 20 mA; RθJA = 300 °C/W on same pad | Slightly higher conduction loss and thermal resistance; less suitable for sustained 200 mA operation above 60 °C | Select when footprint compatibility with Torex's SOD-523 variant is required and thermal margin >15 °C exists |
| BAT54CW-7-F | 30 V VRRM, but IO = 100 mA only; VF = 0.24 V @ 10 mA (lower current rating) | Not rated for continuous 200 mA; limited to signal-level or low-duty-cycle power paths | Choose only for low-current bias networks or ESD protection where average current <50 mA |
Compared with RB520S-30T2R and BAT54CW-7-F, SDM20U30 uniquely supports 200 mA continuous current with 240 °C/W thermal resistance and AEC-Q101 qualification-making it the only option validated for automotive body electronics and thermally constrained portable power rails.
Availability
SDM20U30 is available at Aetrix Electronics and suitable for USB power path protection, automotive body control modules, and portable device battery charging requiring stable component supply and AEC-Q101-compliant sourcing.
Supply support for SDM20U30 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the US.
The SDM20U30 belongs to Diodes' AEC-Q101-qualified Schottky diode product line, engineered specifically for high-reliability power management in automotive and portable electronics where low VF, fast switching, and small footprint are critical.
FAQ
What is the maximum allowable junction temperature for SDM20U30?
The SDM20U30 has a specified operating junction temperature range of –65 °C to +125 °C. Its absolute maximum TJ is +125 °C; exceeding this risks parametric shift and accelerated degradation. Derating begins at +85 °C ambient when mounted on 1-inch² 2 oz copper, per Figure 4 in DS30397.
Is SDM20U30 suitable for reverse polarity protection in 5 V systems?
Yes-its 30 V VRRM and 0.35 V VF at 200 mA make it effective for low-loss reverse polarity protection in 5 V systems. With 150 µA IR at 30 V, leakage remains negligible. However, ensure layout uses the recommended AP02001 pad dimensions to maintain thermal performance and avoid solder wicking.
Does SDM20U30 have a defined cathode marking orientation?
Yes-the cathode is marked by a visible band on the top surface of the SOD523 package. Per Diodes' marking diagram, the band aligns with the "LM" code and corresponds to the cathode terminal in the top-view schematic. This matches JEDEC-standard SOD523 polarity convention.
Can SDM20U30 replace standard silicon diodes in high-frequency rectification?
Yes-its negligible reverse recovery time eliminates switching losses typical of silicon PN diodes. At 1 MHz, its 20 pF capacitance and lack of minority-carrier storage allow clean rectification in SMPS secondary-side synchronous rectifier assist circuits, provided forward current stays within 200 mA average rating.
SDM20U30-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 500 mV @ 200 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 150 µA @ 30 V
- Capacitance @ Vr, F:
- 20pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
- Operating Temperature - Junction:
- -65°C ~ 125°C
SDM20U30-7 FAQ
1.How can I place an order for SDM20U30-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SDM20U30-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SDM20U30-7 reliable?
The price and inventory of SDM20U30-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SDM20U30-7 is usually 5 days.
3.What payment methods are accepted for SDM20U30-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SDM20U30-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SDM20U30-7?
SDM20U30-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SDM20U30-7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SDM20U30-7?
For technical support, including SDM20U30-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SDM20U30-7 requirements.
6.How does Aetrix verify that SDM20U30-7 is sourced from the original manufacturer or authorized distributors?
All SDM20U30-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SDM20U30-7 meets industry standards.
7.What is the process for return or replacement of SDM20U30-7?
All SDM20U30-7 units undergo pre-shipment inspection (PSI). If there is an issue with SDM20U30-7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SDM20U30-7 part is unused and in its original packaging.
Return procedure for SDM20U30-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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