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Diodes Incorporated SDMG0340L-7
- Part No.:
- SDMG0340L-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
SDMG0340L-7.pdf
- Description:
- DIODE SCHOTTKY 40V 30MA SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:5,605
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Product details
Overview
SDMG0340L-7 from Diodes Incorporated is a surface-mount Schottky barrier diode in SOT-323 package, rated for 40 V peak reverse voltage, 30 mA continuous forward current, and 295–370 mV forward voltage at 1.0 mA-optimized for low-power signal rectification and ESD-protected biasing in portable RF front-ends.
For engineers reviewing the SDMG0340L-7 datasheet, SDMG0340L-7 pinout, SDMG0340L-7 application, or SDMG0340L-7 equivalent, key selection criteria include its ultra-low VF, 2.0 pF junction capacitance at 1 V, 200 mA non-repetitive surge rating, RoHS-compliant matte tin plating, and J-STD-020D Level 1 moisture sensitivity.
Technical Context
This Schottky diode employs a PN junction guard ring to suppress transient-induced failure and enhance ESD robustness per IEC 61000-4-2. Its low-barrier metal-semiconductor interface enables fast switching with typical reverse recovery time under 10 ns at IF = 10 mA.
The device operates across –40°C to +125°C and derates linearly above 25°C ambient, delivering 200 mW power dissipation on standard FR-4 PCB with AP02001-compliant pad layout. Thermal resistance is fixed at 625°C/W junction-to-ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - maximum repetitive reverse blocking capability without breakdown |
| IF(AV) | 30 mA - sustained DC forward current limit under thermal design constraints |
| VF @ 1.0 mA | 295–370 mV - low conduction loss enabling efficient biasing in battery-powered receivers |
| CT @ 1 V, 1 MHz | 2.0 pF - minimal junction capacitance preserving RF signal integrity up to ~2 GHz |
| IR @ 10 V | 150–1000 nA - low leakage supporting stable DC reference and detector circuits |
| RθJA | 625 °C/W - defines thermal rise per watt on standard FR-4 layout; requires derating above 25°C |
| Moisture Sensitivity | Level 1 per J-STD-020D - no bake required prior to reflow assembly |
Pinout & Package
Package: SOT-323 - ultra-small plastic surface-mount case (2.10 × 1.30 × 0.95 mm), UL 94V-0 rated, lead-free matte tin-plated terminals over Alloy 42 leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry point | Connected to positive supply or signal source in clamping/biasing configurations |
| Cathode (Pin 2) | Forward current exit / reverse voltage reference | Tied to ground or lower-potential node; forms low-capacitance return path in RF detectors |
| Case / Heat Sink (Pin 3) | Non-connected internal leadframe tab | Electrically isolated; provides mechanical stability but no thermal or electrical function |
Key Features
| Feature | Design Value |
|---|---|
| Guard-ring protected PN junction | Enables reliable operation under ±8 kV contact ESD (IEC 61000-4-2) without parameter shift |
| Ultra-low forward voltage | 295 mV typ. at 1 mA supports accurate low-level signal detection in envelope detectors |
| Sub-2 pF junction capacitance | Minimizes loading on 50 Ω RF paths; preserves bandwidth in 800 MHz–2.4 GHz ISM band receivers |
| SOT-323 footprint | 0.006 g mass and 2.1 × 1.3 mm outline enable high-density placement in wearables and IoT sensors |
Applications
| RF Signal Detector | Low-Voltage Bias Clamp |
|---|---|
Use Scenario: Demodulating AM signals in sub-GHz wireless sensor nodes using passive envelope detection. IC Role / Device Role / Timing Role: Schottky diode acting as zero-bias RF detector with minimal series resistance and parasitic capacitance. Use Value: 2.0 pF CT and 295 mV VF enable >70% detection efficiency at –10 dBm input without external bias. | Use Scenario: Clamping LNA input to prevent overvoltage during hot-swap or ESD events in GNSS modules. IC Role / Device Role / Timing Role: Transient voltage suppressor leveraging guard-ring structure and low dynamic impedance. Use Value: Withstands 200 mA 8.3 ms surge while limiting clamp voltage to ≤0.5 V above rail. |
| Portable Audio DC Blocking | Low-Power Microcontroller Reset Circuit |
Use Scenario: AC-coupling audio line drivers in Bluetooth headsets where space and leakage matter. IC Role / Device Role / Timing Role: Series-blocking diode isolating DC offset between codec and amplifier stages. Use Value: 1000 nA max IR at 10 V ensures <1 μV drift over 10-year lifetime in Class-D output filters. | Use Scenario: Generating clean power-on reset pulse for ARM Cortex-M0+ MCUs in medical patch monitors. IC Role / Device Role / Timing Role: Low-leakage anode-grounded diode shaping RC time constant for POR delay. Use Value: Predictable 300 ns turn-off enables ±2% reset timing accuracy across –40°C to +85°C. |
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 | Higher VF (320–420 mV @ 10 mA); dual-common-cathode configuration | Requires board redesign for single-diode topology; better suited for dual-rail protection | Select when dual-channel clamping is needed and 50 mV VF penalty is acceptable |
| NSR0330P2T5G | Lower IR (max 500 nA @ 10 V); same SOT-323, but no guard ring | Lacks ESD hardening-unsuitable for exposed RF ports or handheld interfaces | Prefer for ultra-low-leakage analog sensing where ESD exposure is controlled |
Compared with BAT54C-7-F and NSR0330P2T5G, SDMG0340L-7 uniquely balances guard-ring ESD protection, sub-300 mV VF at microamp bias, and 2.0 pF CT-making it optimal for space-constrained, battery-operated RF detector and clamp designs requiring field reliability.
Availability
SDMG0340L-7 is available at Aetrix Electronics and suitable for portable RF detectors, low-voltage bias clamps, and microcontroller reset circuits requiring stable component supply, long-lifecycle sourcing, and consistent parametric performance across production batches.
Supply support for SDMG0340L-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, Taiwan, and the U.S.
The SDMG0340L-7 belongs to Diodes' precision Schottky diode product line, engineered specifically for ultra-low-power signal conditioning in space-constrained wireless and portable electronics.
FAQ
What is the maximum operating temperature for SDMG0340L-7?
The SDMG0340L-7 has a specified operating junction temperature range of –40°C to +125°C. Its thermal resistance (RθJA = 625°C/W) means that at 200 mW power dissipation, junction temperature rises 125°C above ambient-so full-rated power is only permissible at TA ≤ 0°C. Derating is required per Figure 5 in DS30248 Rev. 12-2.
Does SDMG0340L-7 have a built-in ESD protection structure?
Yes-the device integrates a PN junction guard ring explicitly designed to improve transient immunity and meet IEC 61000-4-2 ESD requirements. This structure suppresses latch-up and localized heating during electrostatic discharge events, enabling reliable operation in handheld and exposed RF applications without external TVS components.
Can SDMG0340L-7 be used in place of a germanium diode in vintage audio detector circuits?
Yes-its 295 mV typical forward voltage at 1 mA closely matches germanium diodes (≈300 mV), while offering superior consistency, lower leakage (<1 µA vs. >5 µA), and SMT compatibility. Unlike germanium, it maintains stable VF across temperature and exhibits negligible aging, making it a direct, modern replacement in AM radio and crystal receiver detectors.
Is the SOT-323 package of SDMG0340L-7 compatible with standard reflow profiles?
Yes-the device is rated Moisture Sensitivity Level 1 per J-STD-020D, meaning it may be stored indefinitely at ≤30°C/60% RH and requires no pre-bake before standard lead-free reflow (peak 260°C). Its matte tin finish ensures reliable wetting, and the UL 94V-0 molding compound withstands repeated thermal cycling without delamination.
SDMG0340L-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
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 30mA
- 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
- Capacitance @ Vr, F:
- 2pF @ 1V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
- Operating Temperature - Junction:
- -40°C ~ 125°C
SDMG0340L-7 FAQ
1.How can I place an order for SDMG0340L-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SDMG0340L-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 SDMG0340L-7 reliable?
The price and inventory of SDMG0340L-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SDMG0340L-7 is usually 5 days.
3.What payment methods are accepted for SDMG0340L-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SDMG0340L-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SDMG0340L-7?
SDMG0340L-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SDMG0340L-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 SDMG0340L-7?
For technical support, including SDMG0340L-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SDMG0340L-7 requirements.
6.How does Aetrix verify that SDMG0340L-7 is sourced from the original manufacturer or authorized distributors?
All SDMG0340L-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 SDMG0340L-7 meets industry standards.
7.What is the process for return or replacement of SDMG0340L-7?
All SDMG0340L-7 units undergo pre-shipment inspection (PSI). If there is an issue with SDMG0340L-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 SDMG0340L-7 part is unused and in its original packaging.
Return procedure for SDMG0340L-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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