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Diodes Incorporated SDMG0340LA-7
- Part No.:
- SDMG0340LA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- SC-70, SOT-323
- Datasheet:
-
SDMG0340LA-7.pdf
- Description:
- DIODE ARR SCHOTT 40V 30MA SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:2,372
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Product details
Overview
SDMG0340LA-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 continuous current, and 295–370 mV forward voltage at 1.0 mA, used in low-power signal rectification and ESD-protected bias networks.
For engineers reviewing the SDMG0340LA-7 datasheet, SDMG0340LA-7 pinout, SDMG0340LA-7 application, or SDMG0340LA-7 equivalent, key selection criteria include ultra-low VF for battery-sensitive circuits, 2.0 pF junction capacitance for RF detector front-ends, 200 mA non-repetitive surge rating for transient clamping, and RoHS-compliant green molding compound compliance.
Technical Context
This Schottky diode employs a PN junction guard ring to enhance transient immunity and ESD robustness without compromising switching speed. Its low-barrier metal-semiconductor interface enables fast recovery (typ. <10 ns) and minimal stored charge, making it suitable for high-frequency demodulation and sampling circuits.
The device operates across –40°C to +125°C with 625°C/W junction-to-ambient thermal resistance on standard FR-4 PCBs. Power derating begins above 25°C ambient, reaching zero dissipation at 125°C - critical for compact portable designs with limited airflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum reverse voltage before breakdown; defines safe blocking range in 3.3 V/5 V rail clamp or signal-level rectifier applications |
| VF @ 1.0 mA | 295–370 mV - Low forward drop minimizes power loss in always-on bias networks and battery-powered sensor nodes |
| IR @ 10 V | 150–1000 nA - Ultra-low leakage preserves signal integrity in high-impedance analog front-ends and precision reference paths |
| CT @ 1 V | 2.0 pF - Low junction capacitance supports >500 MHz operation in RF detector and mixer applications |
| IFSM | 200 mA - Withstands short-duration ESD transients per IEC 61000-4-2 Level 4 without degradation |
| RθJA | 625 °C/W - Requires careful PCB copper area allocation for thermal management in sustained 30 mA operation |
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 in rectifier or clamp configuration; marked side of package indicates cathode |
| Cathode (Pin 2) | Forward current exit / reverse blocking terminal | Typically tied to ground or lower-voltage rail; serves as ESD shunt path to GND in protection circuits |
| Case / Pin 3 | No internal connection | Thermally conductive but electrically isolated tab; provides mechanical anchoring and minor heat spreading on PCB |
Key Features
| Feature | Design Value |
|---|---|
| PN junction guard ring | Enhances ESD immunity (IEC 61000-4-2 compliant) and transient voltage tolerance without increasing VF or CT |
| Green molding compound | Halogen-free, antimony-free encapsulant meeting Diodes Inc.'s "Green" Policy (date code 0627+), reducing environmental impact in end-of-life disposal |
| Ultra-low VF at microamp bias | Enables accurate DC restoration in low-signal-level AM detectors where conventional diodes exhibit excessive threshold voltage |
| SOT-323 footprint compatibility | Shares land pattern with industry-standard SOT-323 discrete devices, enabling drop-in replacement in space-constrained layouts |
Applications
| RF Signal Detector | Low-Power Bias Network |
|---|---|
Use Scenario: Demodulating AM signals in sub-GHz ISM band receivers (e.g., 315/433 MHz remote controls). IC Role / Device Role / Timing Role: Schottky detector diode converting RF envelope to baseband DC voltage. Use Value: 2.0 pF CT and <10 ns trr preserve high-frequency response; 295 mV VF ensures sensitivity down to –20 dBm input. | Use Scenario: Providing temperature-stable bias current to op-amp input stages in portable medical sensors. IC Role / Device Role / Timing Role: Precision current source element using forward conduction characteristics. Use Value: 150–1000 nA IR ensures minimal error current injection; –40°C to +125°C operation maintains accuracy across clinical environments. |
| ESD Protection Clamp | USB Data Line Clamp |
Use Scenario: Protecting I²C bus lines (SDA/SCL) against contact discharge in industrial control modules. IC Role / Device Role / Timing Role: Low-capacitance bidirectional transient voltage suppressor. Use Value: Guard ring structure withstands ±8 kV contact ESD (IEC 61000-4-2); 2.0 pF CT avoids signal integrity degradation at 400 kHz bus speeds. | Use Scenario: Clamping D+ and D− lines in USB 2.0 full-speed (12 Mbps) peripheral interfaces. IC Role / Device Role / Timing Role: Signal-line ESD protector placed between connector and transceiver IC. Use Value: 40 V VRRM exceeds USB 5 V VBUS margin; 295 mV VF prevents false logic-level shifts during normal data transmission. |
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; 30 V VRRM (vs. 40 V); 310 mV VF @ 1 mA; 3.0 pF CT | Limited to ≤3.3 V systems; higher CT reduces RF bandwidth | Prefer when cost sensitivity outweighs 40 V margin and RF performance |
| NSR0330P2T5G | 0.8 mm × 0.6 mm SOD-523; 30 V VRRM; 275 mV VF @ 1 mA; 1.5 pF CT | Smaller footprint but lower surge rating (120 mA IFSM); no guard ring | Select for ultra-dense layouts where ESD robustness is secondary to size |
Compared with BAT54C-7-F and NSR0330P2T5G, SDMG0340LA-7 uniquely combines 40 V blocking, guard-ring-enhanced ESD tolerance, and 2.0 pF capacitance - making it optimal for industrial I²C protection and sub-GHz RF detection where reliability and RF fidelity are jointly critical.
Availability
SDMG0340LA-7 is available at Aetrix Electronics and suitable for low-power RF detection, ESD-protected I²C buses, and precision bias networks requiring stable component supply across automotive infotainment, industrial IoT sensor nodes, and portable medical instrumentation.
Supply support for SDMG0340LA-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, serving industrial, computing, consumer, and communications markets with high-reliability components.
The SDMG series targets space-constrained, low-power applications demanding Schottky performance with enhanced ESD resilience - specifically designed for signal integrity preservation in portable and wireless systems.
FAQ
What is the maximum operating temperature for SDMG0340LA-7?
The SDMG0340LA-7 has an operating junction temperature range of –40°C to +125°C. Its thermal resistance (RθJA = 625°C/W) requires appropriate PCB copper area for sustained 30 mA operation above 25°C ambient - power derating follows the curve in Figure 5 of DS30248 Rev. 12-2.
Does SDMG0340LA-7 have a built-in guard ring, and what does it do?
Yes, SDMG0340LA-7 incorporates a PN junction guard ring structure. This feature improves transient voltage suppression and ESD robustness (per IEC 61000-4-2) by controlling electric field distribution at the die edge, preventing premature avalanche without raising forward voltage or capacitance.
Is SDMG0340LA-7 compatible with lead-free reflow processes?
Yes - SDMG0340LA-7 uses matte tin plating over Alloy 42 leadframe and conforms to J-STD-020D Level 1 moisture sensitivity. It supports standard Pb-free reflow profiles (peak 260°C) without delamination or solder joint reliability issues.
How does the 2.0 pF capacitance affect its use in RF applications?
The 2.0 pF total capacitance (measured at 1 V, 1 MHz) enables effective operation up to ~500 MHz in detector and mixer roles. At 433 MHz, capacitive reactance remains >180 Ω, minimizing RF signal loading while preserving amplitude detection linearity in low-power receivers.
SDMG0340LA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Anode
- 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
SDMG0340LA-7 FAQ
1.How can I place an order for SDMG0340LA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SDMG0340LA-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 SDMG0340LA-7 reliable?
The price and inventory of SDMG0340LA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SDMG0340LA-7 is usually 5 days.
3.What payment methods are accepted for SDMG0340LA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SDMG0340LA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SDMG0340LA-7?
SDMG0340LA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SDMG0340LA-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 SDMG0340LA-7?
For technical support, including SDMG0340LA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SDMG0340LA-7 requirements.
6.How does Aetrix verify that SDMG0340LA-7 is sourced from the original manufacturer or authorized distributors?
All SDMG0340LA-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 SDMG0340LA-7 meets industry standards.
7.What is the process for return or replacement of SDMG0340LA-7?
All SDMG0340LA-7 units undergo pre-shipment inspection (PSI). If there is an issue with SDMG0340LA-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 SDMG0340LA-7 part is unused and in its original packaging.
Return procedure for SDMG0340LA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SDMG0340LA-7 Tags
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BAV99-7-F
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