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Diodes Incorporated SDM40E20LS-7-F
- Part No.:
- SDM40E20LS-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SDM40E20LS-7-F.pdf
- Description:
- DIODE ARR SCHOT 20V 400MA SOT233
- Quantity:
- Payment:
- Shipping:
Inventory:12,406
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Product details
Overview
SDM40E20LS-7-F from Diodes Incorporated is a dual-channel surface-mount Schottky barrier diode in SOT23 package, rated for 20 V peak repetitive reverse voltage, 0.4 A forward continuous current, and featuring a low 0.31 V typical forward voltage at 0.1 A - optimized for high-efficiency DC/DC converter output rectification in space-constrained power supplies.
For engineers reviewing the SDM40E20LS-7-F datasheet, SDM40E20LS-7-F pinout, SDM40E20LS-7-F application, or SDM40E20LS-7-F equivalent, key selection criteria include its 20 V VRRM rating, 0.31–0.43 V VF range across 0.1–0.5 A, 100–250 µA IR at 10–20 V reverse bias, 120 pF CT at 0 V, and SOT23 thermal resistance of 444 °C/W on FR-5 PCB.
Technical Context
This dual Schottky diode integrates two independent anode-cathode junctions in a single SOT23-3 package with common cathode configuration (pin 3 shared), enabling synchronous rectification or dual-path clamping in compact DC/DC topologies. Its guard ring construction provides inherent transient protection without external components.
Designed for low-loss operation, it delivers high conductance and low forward voltage drop across its rated current range while maintaining tight leakage control (≤250 µA at 20 V) and stable capacitance (120 pF at 0 V, f = 1 MHz), supporting fast-switching applications up to several hundred kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum non-repetitive reverse voltage before breakdown; sets upper limit for output rectifier selection in ≤12 V output converters. |
| IF(AV) | 0.4 A - Continuous average forward current per diode element; defines steady-state power handling in thermally constrained layouts. |
| VF @ 0.1 A | 0.31 V typical - Low conduction loss enables >95% efficiency in 3.3 V/5 V buck converters with minimal thermal rise. |
| IR @ 20 V | 250 µA max - Low leakage preserves light-load efficiency and prevents unintended discharge in hold-up or standby circuits. |
| CT @ 0 V | 120 pF - Junction capacitance impacts switching speed and EMI; suitable for ≤500 kHz PWM frequencies without excessive ringing. |
| RθJA | 444 °C/W - Thermal resistance on standard FR-5 PCB; requires <100 mW dissipation to stay below 125 °C junction temperature. |
Pinout & Package
Package: SOT23-3, plastic molded, UL 94V-0 rated, 0.008 g weight, moisture sensitivity level 1. Dimensions: 2.90 × 1.30 × 1.025 mm (L × W × H), with 0.915 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode 1 | Input terminal for first Schottky junction; connects to switching node in synchronous rectifier or input side in clamp circuit. |
| Pin 2 | Anode 2 | Input terminal for second independent Schottky junction; supports dual-rail or redundant path designs. |
| Pin 3 | Cathode (Common) | Shared output node for both diodes; ties to output rail or ground reference, enabling compact dual-anode/single-cathode layout. |
Key Features
| Feature | Design Value |
|---|---|
| Very low forward voltage | 0.31 V typ. @ 0.1 A - Reduces conduction loss by ≥40% vs. standard silicon diodes, directly improving converter efficiency. |
| Guard ring construction | Integrated transient protection - Eliminates need for external TVS in moderate-surge environments (e.g., USB port clamping). |
| High conductance | Low dynamic resistance - Maintains stable VF under varying load, minimizing output voltage deviation in regulated supplies. |
| Lead-free & RoHS 3 compliant | Meets EU Directive 2015/863 - Ensures compatibility with modern reflow profiles and environmental compliance for industrial and consumer shipments. |
Applications
| USB Power Delivery Clamp | DC/DC Converter Output Rectifier |
|---|---|
Use Scenario: Clamping transient overvoltage on 5 V USB Type-C VBUS line during hot-plug events. IC Role / Device Role / Timing Role: Dual-anode Schottky clamp protecting downstream PMIC and load switches from ±15 kV ESD and 100 V surge pulses. Use Value: 0.31 V VF ensures minimal voltage drop during normal operation; 20 V VRRM safely absorbs 12 V transients without conduction. |
Use Scenario: Secondary-side rectification in 3.3 V/2 A buck converter for FPGA core supply. IC Role / Device Role / Timing Role: High-frequency synchronous rectifier replacing MOSFET gate drive complexity in cost-sensitive designs. Use Value: 120 pF CT and low RθJA enable clean switching at 300 kHz with <1.5 °C junction rise at full load. |
| Automotive Body Control Module | IoT Sensor Node Power Path |
Use Scenario: Reverse polarity protection and load dump clamping in 12 V automotive sub-systems (e.g., mirror control). IC Role / Device Role / Timing Role: Dual-diode path isolating battery feed from microcontroller I/O while absorbing ISO 7637-2 pulse 5a surges. Use Value: Guard ring structure withstands 200 V/10 ms transients; -65 to +125 °C TJ range supports under-hood deployment. |
Use Scenario: OR-ing diode for dual power sources (battery + energy harvester) in ultra-low-power wireless sensor nodes. IC Role / Device Role / Timing Role: Low-leakage path selector preventing backfeed and maximizing standby time. Use Value: 100 µA IR max @ 10 V ensures <1 µA net leakage in series-connected dual-diode configuration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RB050M-30TR | Single-channel, 30 V VRRM, 0.5 A IF, SOD-323 package | Lacks dual-element integration; requires two devices for same function; higher VF (0.45 V @ 0.1 A) | Use only when board area allows discrete placement and 30 V margin is required over 20 V. |
| NSR20F20NXT5G | Dual, 20 V VRRM, 0.2 A IF, SOT-23 package, VF = 0.35 V @ 0.1 A | Lower current rating limits use to ≤100 mA loads; tighter IR spec (50 µA @ 10 V) | Select when ultra-low leakage dominates over current capacity, e.g., battery monitoring paths. |
Compared with RB050M-30TR and NSR20F20NXT5G, SDM40E20LS-7-F uniquely balances 0.4 A current capability, 0.31 V low VF, dual integration in SOT23, and 20 V rating - making it optimal for space-limited 5–12 V power rails where efficiency and component count are critical.
Availability
SDM40E20LS-7-F is available at Aetrix Electronics and suitable for USB power delivery protection, DC/DC converter output rectification, and automotive body control modules requiring stable component supply and RoHS-compliant sourcing.
Supply support for SDM40E20LS-7-F 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 Americas.
This device belongs to Diodes' SDM40ExxL dual Schottky family, engineered specifically for high-efficiency, low-voltage power conversion and transient protection in consumer, computing, and automotive subsystems.
FAQ
Is SDM40E20LS-7-F pin-compatible with SDM40E20LC-7 or SDM40E20LA-7?
Yes - all three variants share identical SOT23-3 pinout and mechanical dimensions. The suffix 'S', 'C', and 'A' denote different marking codes (KSW, KWS, KWA) and date-code formats, not functional or electrical differences. They are electrically interchangeable in design.
What is the maximum allowable junction temperature during continuous operation?
The absolute maximum junction temperature is +125 °C. With RθJA = 444 °C/W on FR-5 PCB and PD = 225 mW, sustained operation at full 0.4 A requires ambient temperatures ≤85 °C to avoid exceeding TJ(max); derating above that is mandatory per Fig. 4.
Does this diode support automotive-grade reliability requirements?
No - SDM40E20LS-7-F is an industrial-grade part. For automotive applications, Diodes offers the AEC-Q101 qualified SDM40E20LSQ/AQ variant, which undergoes additional stress testing and uses different wafer processing and qualification protocols.
Can SDM40E20LS-7-F be used in reverse-biased Zener-like mode for voltage clamping?
No - it is a Schottky barrier diode with no specified reverse breakdown characteristic beyond VRRM = 20 V. Its reverse leakage rises gradually above 10 V but lacks controlled avalanche behavior; dedicated TVS or Zener diodes must be used for precise clamping.
SDM40E20LS-7-F 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 Series Connection
- 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
SDM40E20LS-7-F FAQ
1.How can I place an order for SDM40E20LS-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SDM40E20LS-7-F 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 SDM40E20LS-7-F reliable?
The price and inventory of SDM40E20LS-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SDM40E20LS-7-F is usually 5 days.
3.What payment methods are accepted for SDM40E20LS-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SDM40E20LS-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SDM40E20LS-7-F?
SDM40E20LS-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SDM40E20LS-7-F 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 SDM40E20LS-7-F?
For technical support, including SDM40E20LS-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SDM40E20LS-7-F requirements.
6.How does Aetrix verify that SDM40E20LS-7-F is sourced from the original manufacturer or authorized distributors?
All SDM40E20LS-7-F 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 SDM40E20LS-7-F meets industry standards.
7.What is the process for return or replacement of SDM40E20LS-7-F?
All SDM40E20LS-7-F units undergo pre-shipment inspection (PSI). If there is an issue with SDM40E20LS-7-F, 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 SDM40E20LS-7-F part is unused and in its original packaging.
Return procedure for SDM40E20LS-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SDM40E20LS-7-F 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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