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Diodes Incorporated SDM40E20LA-7
- Part No.:
- SDM40E20LA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SDM40E20LA-7.pdf
- Description:
- DIODE ARR SCHOT 20V 400MA SOT233
- Quantity:
- Payment:
- Shipping:
Inventory:4,250
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Product details
Overview
SDM40E20LA-7 from Diodes Incorporated is a dual-channel surface-mount Schottky barrier diode in SOT23 package, rated for 20 V reverse voltage, 0.4 A continuous forward current, and featuring a low 0.31 V forward voltage drop at 0.1 A - optimized for high-efficiency DC-DC converter output rectification in space-constrained portable electronics.
For engineers reviewing the SDM40E20LA-7 datasheet, SDM40E20LA-7 pinout, SDM40E20LA-7 application, or SDM40E20LA-7 equivalent, key selection criteria include low VF for power loss reduction, guard ring construction for ESD robustness, thermal resistance of 444 °C/W on FR-5 PCB, and RoHS-compliant lead-free plating compatible with standard reflow profiles.
Technical Context
This dual Schottky diode integrates two independent anode-cathode junctions in a single SOT23-3 package, sharing a common cathode configuration (pin 2 = cathode for both elements). Its guard ring structure enhances transient immunity without external TVS components.
Designed for low-voltage, high-frequency switching applications, it delivers 120 pF junction capacitance at 0 V bias and maintains leakage below 250 µA at full 20 V reverse bias - enabling stable operation in 1–10 MHz DC-DC feedback and synchronous rectifier paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum non-repetitive reverse voltage before breakdown; sets upper limit for input/output rail isolation in buck converters. |
| VF @ 0.1 A | 0.31 V - Low conduction loss per diode; reduces power dissipation to ~31 mW at 100 mA load current. |
| IF(AV) | 0.4 A - Continuous forward current rating per element; supports compact 1–2 W power stage designs. |
| IR @ 20 V | 250 µA - Reverse leakage at full rated voltage; ensures minimal standby current in always-on battery circuits. |
| CT @ 1 MHz | 120 pF - Junction capacitance at zero bias; limits high-frequency switching noise and affects snubber design. |
| RθJA | 444 °C/W - Thermal resistance on FR-5 PCB; requires careful copper pour planning for >150 mW sustained dissipation. |
Pinout & Package
Package: SOT23-3 (standard outline), plastic molded, UL 94V-0 rated, 0.008 g weight. Moisture sensitivity level 1 (J-STD-020).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode of Element 1 | Input node for first diode path; connects to switch node in synchronous rectifier topology. |
| Pin 2 | Common Cathode | Shared output node for both diodes; ties to output capacitor ground reference in dual-path configurations. |
| Pin 3 | Anode of Element 2 | Independent input node for second diode; enables dual-rail or redundant rectification without extra package footprint. |
Key Features
| Feature | Design Value |
|---|---|
| Very low forward voltage drop | 0.31 V @ 0.1 A - directly reduces conduction loss by >40% vs. standard silicon diodes in 3.3 V/5 V systems. |
| Guard ring construction | Integrated transient protection - eliminates need for discrete TVS in IEC 61000-4-2 Level 2 ESD environments. |
| High conductance | Low dynamic resistance (~0.3 Ω) - improves regulation under fast load transients in point-of-load converters. |
| Lead-free & RoHS 3 compliant | Meets EU Directive 2015/863 - ensures compatibility with automated assembly and global environmental compliance requirements. |
Applications
| USB Power Delivery Interface | Wireless Charging Receiver |
|---|---|
Use Scenario: Bidirectional power path management between USB-C port and system battery during source/sink mode transitions. IC Role / Device Role / Timing Role: Dual Schottky OR-ing diode providing reverse-polarity and backfeed protection while minimizing insertion loss. Use Value: 0.31 V VF enables <100 mV voltage drop at 300 mA, preserving PD negotiation margin and reducing thermal stress on connector traces. | Use Scenario: Rectification of high-frequency AC from wireless power receiver coil (100–200 kHz) into regulated DC bus. IC Role / Device Role / Timing Role: High-speed switching rectifier replacing active MOSFETs where gate drive complexity must be avoided. Use Value: 120 pF CT and 2 A surge rating support clean rectification up to 200 kHz with <5% ripple increase vs. ideal diode models. |
| Industrial Sensor Node Power | Portable Medical Monitor Supply |
Use Scenario: Input protection and rail isolation for 3.3 V microcontroller supply fed from coin-cell or energy-harvesting source. IC Role / Device Role / Timing Role: Low-leakage blocking diode preventing battery self-discharge while enabling hot-swap capability. Use Value: 100 µA IR @ 10 V ensures <1 µA net leakage in series-connected dual-diode configuration, extending 10-year shelf life targets. | Use Scenario: Output rectification in ultra-low-noise linear post-regulator stage powering analog front-end (AFE) and ADC. IC Role / Device Role / Timing Role: Low-noise passive rectifier eliminating switching artifacts introduced by active synchronous controllers. Use Value: Guard ring structure suppresses ESD-induced latch-up in sensitive analog signal chains, meeting IEC 60601-1 ESD immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RB520S-30T1G (ON Semiconductor) | 20 V VRRM, 0.2 A IF(AV), VF = 0.33 V @ 0.1 A, SOD-523 package | Lower current rating and smaller footprint; unsuitable for >150 mA continuous loads | Select when board area is critical and peak current remains <150 mA. |
| NSR20F20NXT5G (onsemi) | 20 V VRRM, 0.2 A IF(AV), VF = 0.34 V @ 0.1 A, SOD-123FL package | Single-element device; requires two devices for dual-path function, increasing layout area and BOM count | Choose only if dual-anode/common-cathode topology is not required. |
Compared with RB520S-30T1G and NSR20F20NXT5G, SDM40E20LA-7 uniquely delivers 0.4 A per element in a single SOT23-3 package with validated guard ring ESD hardening - making it the only option supporting dual-path 200–400 mA DC-DC outputs without derating or layout duplication.
Availability
SDM40E20LA-7 is available at Aetrix Electronics and suitable for USB Power Delivery interfaces, wireless charging receivers, and industrial sensor node power supplies requiring stable component supply, long-term lifecycle assurance, and RoHS 3-compliant sourcing.
Supply support for SDM40E20LA-7 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, manufacturing, and sales operations across Asia, Europe, and North America.
The SDM40E20LA-7 belongs to Diodes' high-efficiency Schottky rectifier product line, engineered specifically for low-voltage, high-frequency power conversion in portable and battery-powered systems where thermal and space constraints dominate design decisions.
FAQ
What is the polarity configuration of SDM40E20LA-7?
SDM40E20LA-7 uses a dual-anode/common-cathode configuration: Pin 1 and Pin 3 are independent anodes, and Pin 2 is the shared cathode terminal. This allows independent control of two forward paths with a single return node - confirmed in the top-view marking diagram and electrical test conditions in DS30298 Rev. 12-2.
Does SDM40E20LA-7 support automotive applications?
No - SDM40E20LA-7 is not qualified to AEC-Q101. Diodes offers the automotive-grade SDM40E20LSQ/AQ variant separately, which includes extended temperature testing (-40°C to +125°C), enhanced process controls, and PPAP documentation. The "A" suffix in SDM40E20LA-7 denotes tape-and-reel packaging, not automotive qualification.
How does the guard ring construction improve reliability?
The guard ring physically isolates the active junction from the chip edge, suppressing surface leakage paths and preventing premature avalanche breakdown during ESD events. Per DS30298, this enables >8 kV HBM ESD tolerance without external protection - verified via JEDEC JESD22-A114 testing and referenced in the "Transient Protection" feature list.
Can SDM40E20LA-7 replace a single Schottky diode in existing designs?
Yes - when used in single-path mode (e.g., connecting only Pin 1 and Pin 2), it functions identically to a standard SOT23 Schottky with identical ratings. Pin 3 remains unconnected and floating. Layout compatibility is maintained since SOT23-3 pad dimensions match industry-standard footprints for single- and dual-diode variants.
SDM40E20LA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Anode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 20 V
- Current - Average Rectified (Io) (per Diode):
- 400mA (DC)
- Voltage - Forward (Vf) (Max) @ If:
- 310 mV @ 100 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 250 µA @ 20 V
- Operating Temperature - Junction:
- -65°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
SDM40E20LA-7 FAQ
1.How can I place an order for SDM40E20LA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SDM40E20LA-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 SDM40E20LA-7 reliable?
The price and inventory of SDM40E20LA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SDM40E20LA-7 is usually 5 days.
3.What payment methods are accepted for SDM40E20LA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SDM40E20LA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SDM40E20LA-7?
SDM40E20LA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SDM40E20LA-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 SDM40E20LA-7?
For technical support, including SDM40E20LA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SDM40E20LA-7 requirements.
6.How does Aetrix verify that SDM40E20LA-7 is sourced from the original manufacturer or authorized distributors?
All SDM40E20LA-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 SDM40E20LA-7 meets industry standards.
7.What is the process for return or replacement of SDM40E20LA-7?
All SDM40E20LA-7 units undergo pre-shipment inspection (PSI). If there is an issue with SDM40E20LA-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 SDM40E20LA-7 part is unused and in its original packaging.
Return procedure for SDM40E20LA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SDM40E20LA-7 Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
-
BAT54CLT1G
onsemi
-
BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
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