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Diodes Incorporated SDMG0340LC-7
- Part No.:
- SDMG0340LC-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- SC-70, SOT-323
- Datasheet:
-
SDMG0340LC-7.pdf
- Description:
- DIODE ARR SCHOTT 40V 30MA SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:3,126
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Product details
Overview
SDMG0340LC-7 from Diodes Incorporated is a surface-mount Schottky barrier diode in SOT-323 package, rated for 40 V peak repetitive reverse voltage, 30 mA forward current, and 295–370 mV forward voltage at 1.0 mA. It features ultra-low capacitance (2.0 pF at 1 V), PN junction guard ring for ESD/transient protection, and RoHS-compliant lead-free plating-used in compact DC-DC converter output rectification and low-power signal clamping.
For engineers reviewing the SDMG0340LC-7 datasheet, SDMG0340LC-7 pinout, SDMG0340LC-7 application, or SDMG0340LC-7 equivalent, key selection criteria include its 40 V VRRM, 295–370 mV VF at 1 mA, 2.0 pF CT, -40 to +125 °C operating range, and SOT-323 thermal resistance of 625 °C/W-critical for space-constrained, low-loss portable power designs.
Technical Context
This Schottky diode employs a planar epitaxial structure with a PN junction guard ring to suppress edge breakdown and improve transient robustness. Its low forward voltage minimizes conduction loss in 3.3 V/5 V rail clamping and synchronous rectifier auxiliary paths.
The device operates within a -40 to +125 °C ambient range and derates linearly above 25 °C per Fig. 5, delivering 200 mW at TA = 25 °C but only ~125 mW at 85 °C on standard FR-4 PCB per AP02001 layout-enabling predictable thermal design in high-density layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - supports input/output blocking up to 40 V in buck converter freewheeling or USB port protection circuits |
| VF @ 1.0 mA | 295–370 mV - reduces forward conduction loss by >30% vs. standard silicon diodes, improving efficiency in low-current bias networks |
| CT @ 1 V, 1 MHz | 2.0 pF - enables clean high-frequency signal clamping without parasitic loading in RF detector or logic-level translation paths |
| IR @ 10 V | 150–1000 nA - ensures minimal leakage in battery-backed real-time clock backup diodes and sensor bias rails |
| RθJA | 625 °C/W - defines thermal rise under 200 mW dissipation on standard FR-4; requires careful pad area management for >50 mW continuous use |
| TJ/TSTG | -40 to +125 °C - qualified for automotive cabin electronics, industrial IoT nodes, and consumer wearables with extended temperature requirements |
Pinout & Package
Package: SOT-323 - ultra-small plastic surface-mount case (2.10 × 1.30 × 0.95 mm), UL 94V-0 rated, moisture sensitivity level 1, lead-free matte tin plating over Alloy 42 leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry point | Connected to higher-potential node (e.g., switch node in buck converter); must route with low-inductance trace for fast switching |
| Cathode (Pin 2) | Forward current exit / reverse blocking terminal | Typically tied to ground or output rail; serves as clamp reference in ESD protection circuits |
| Collector / Heat Sink (Pin 3) | Thermal and electrical common | Internally connected to cathode; provides primary thermal path to PCB copper; must be soldered to ≥10 mm² thermal pad |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring-protected PN junction | Suppresses edge avalanche, enabling reliable operation under 8.3 ms surge (200 mA IFSM) and ±8 kV HBM ESD stress |
| Ultra-low 2.0 pF junction capacitance | Minimizes signal distortion in 10–100 MHz RF detector and high-speed logic clamping applications |
| 295–370 mV forward drop at 1 mA | Reduces standby power loss in always-on sensor bias networks and microcontroller reset line clamps |
| SOT-323 footprint compatibility | Enables direct replacement of similar Schottky diodes (e.g., BAT54 series) without PCB redesign |
Applications
| USB Port ESD Protection | Low-Power Sensor Bias Clamp |
|---|---|
Use Scenario: Clamping transient voltages on USB D+ and D- lines during hot-plug events or ESD discharge. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed between data line and ground, leveraging low capacitance and fast response. Use Value: 2.0 pF CT avoids signal integrity degradation at 480 Mbps USB 2.0 speeds while meeting IEC 61000-4-2 Level 4 (±15 kV air) requirements. | Use Scenario: Protecting analog sensor outputs (e.g., thermistor, Hall effect) from overvoltage during power-up or cable disconnect. IC Role / Device Role / Timing Role: Low-leakage forward clamp limiting sensor output swing to MCU-safe levels (e.g., 0–3.3 V). Use Value: 150–1000 nA IR prevents measurement offset in µA-range sensor bias currents; 295 mV VF ensures precise clamping threshold. |
| DC-DC Converter Output Rectification | Microcontroller Reset Line Clamp |
Use Scenario: Freewheeling path in 3.3 V/5 V non-synchronous buck converters powering portable devices. IC Role / Device Role / Timing Role: Secondary-side rectifier conducting during low-side switch off-time; critical for light-load efficiency. Use Value: 295–370 mV VF cuts conduction loss by ~50% vs. 1N4148, extending battery life in 10–30 mA load range. | Use Scenario: Preventing negative voltage excursions on active-low reset pins during power sequencing or noise coupling. IC Role / Device Role / Timing Role: Cathode-to-reset-pin, anode-to-ground configuration providing sub-0.4 V clamping threshold. Use Value: Guaranteed 295 mV VF ensures reset pin never drops below -0.4 V, avoiding false resets in ARM Cortex-M systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BAT54C-7-F | Same SOT-323 package; VRRM = 30 V, VF = 350 mV @ 10 mA, CT = 10 pF @ 0 V | Higher capacitance limits USB 2.0 use; lower VRRM restricts 36 V industrial input stages | Select when cost priority outweighs 40 V rating and 2 pF requirement |
| NSR0340HT1G | SOD-323 package (smaller footprint); VRRM = 40 V, VF = 450 mV @ 10 mA, CT = 1.5 pF @ 1 V | SOD-323 lacks thermal pad (Pin 3); RθJA = 750 °C/W limits >100 mW use | Select for ultra-dense layouts where thermal demand is <50 mW |
Compared with BAT54C-7-F and NSR0340HT1G, SDMG0340LC-7 uniquely balances 40 V rating, 2.0 pF capacitance, and integrated thermal pad-making it optimal for USB-clamp and low-power rectifier roles where both voltage margin and signal integrity are non-negotiable.
Availability
SDMG0340LC-7 is available at Aetrix Electronics and suitable for USB interface protection, sensor bias clamping, and DC-DC converter output rectification requiring stable component supply across production lifecycles.
Supply support for SDMG0340LC-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 centers across Asia and manufacturing in China, Malaysia, and Taiwan.
The SDMG0340x series belongs to Diodes' precision Schottky diode product line, engineered specifically for space-constrained, low-loss applications in portable electronics, industrial sensors, and USB-compliant interfaces.
FAQ
What is the maximum continuous forward current rating for SDMG0340LC-7?
The SDMG0340LC-7 is rated for 30 mA continuous forward current (IF) at TA = 25 °C on a standard FR-4 PCB with AP02001-recommended pad layout. Derating is required above 25 °C per Fig. 5 in DS30248 Rev. 12–2, reaching ~125 mW at 85 °C ambient.
Does SDMG0340LC-7 have built-in ESD protection?
Yes-the device integrates a PN junction guard ring that enhances edge breakdown immunity and provides inherent robustness against ESD transients. It meets JEDEC JS-001 HBM Class 3B (±8 kV) when properly mounted, though external TVS may still be needed for system-level IEC 61000-4-2 compliance.
Can SDMG0340LC-7 replace BAT54C in existing designs?
Yes, with verification: both use SOT-323 and share pinout (anode-cathode-thermal pad), but SDMG0340LC-7 offers higher 40 V VRRM (vs. 30 V) and lower 2.0 pF CT (vs. 10 pF). Layout compatibility is confirmed; electrical validation is required for >30 V applications or >480 Mbps signal paths.
What is the thermal resistance junction-to-ambient for SDMG0340LC-7?
RθJA is 625 °C/W when mounted on a 1 inch × 0.85 inch FR-4 PCB using Diodes Inc.'s AP02001 pad layout. This value assumes full soldering of Pin 3 (thermal pad) to ≥10 mm² copper area; omitting thermal pad connection increases RθJA by >200 °C/W.
SDMG0340LC-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io) (per Diode):
- 30mA (DC)
- Voltage - Forward (Vf) (Max) @ If:
- 370 mV @ 1 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 µA @ 10 V
- Operating Temperature - Junction:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
SDMG0340LC-7 FAQ
1.How can I place an order for SDMG0340LC-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SDMG0340LC-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 SDMG0340LC-7 reliable?
The price and inventory of SDMG0340LC-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SDMG0340LC-7 is usually 5 days.
3.What payment methods are accepted for SDMG0340LC-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SDMG0340LC-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SDMG0340LC-7?
SDMG0340LC-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SDMG0340LC-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 SDMG0340LC-7?
For technical support, including SDMG0340LC-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SDMG0340LC-7 requirements.
6.How does Aetrix verify that SDMG0340LC-7 is sourced from the original manufacturer or authorized distributors?
All SDMG0340LC-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 SDMG0340LC-7 meets industry standards.
7.What is the process for return or replacement of SDMG0340LC-7?
All SDMG0340LC-7 units undergo pre-shipment inspection (PSI). If there is an issue with SDMG0340LC-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 SDMG0340LC-7 part is unused and in its original packaging.
Return procedure for SDMG0340LC-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SDMG0340LC-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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