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Diodes Incorporated SDMK0340L-7-F
- Part No.:
- SDMK0340L-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SDMK0340L-7-F.pdf
- Description:
- DIODE SCHOTTKY 40V 30MA SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:20,947
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Product details
Overview
SDMK0340L-7-F from Diodes Incorporated is a surface-mount Schottky barrier diode with 40 V peak reverse voltage, 30 mA maximum forward current, and low 290–370 mV forward voltage drop at 1 mA-designed for low-power logic-level clamping and signal rectification in portable USB interfaces and battery-powered sensor nodes.
For engineers reviewing the SDMK0340L-7-F datasheet, SDMK0340L-7-F pinout, SDMK0340L-7-F application, or SDMK0340L-7-F equivalent, key selection criteria include its SOD-323 package footprint, 2 pF junction capacitance at 1 V, 0.2–0.5 µA leakage at 30 V, guard ring construction for ESD robustness, and RoHS-compliant lead-free plating.
Technical Context
This Schottky diode employs a guard ring die structure to suppress edge breakdown and improve transient immunity-critical for I/O protection in 3.3 V and 5 V digital systems. Its low 290–370 mV VF enables efficient clamping without loading low-voltage logic signals.
With only 2 pF capacitance at 1 V reverse bias and sub-10 ns reverse recovery time, it preserves signal integrity in high-speed data lines such as USB 2.0 D+/D−, SMBus, and I²C bus termination, while operating reliably from −40 °C to +125 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse voltage before breakdown; sets safe operating limit for 3.3 V/5 V rail clamping |
| VF @ 1 mA | 290–370 mV - Low conduction loss preserves logic high level during active clamping |
| IR @ 30 V | 0.2–0.5 µA - Minimal leakage avoids battery drain in always-on sensor circuits |
| CT @ 1 V | 2 pF - Enables use on 12–480 Mbps digital buses without signal distortion |
| RθJA | 625 °C/W - Limits power dissipation to 160 mW at TA = 25 °C; derates linearly above 25 °C |
| Package | SOD-323 - 1.2 × 2.5 mm footprint; compatible with standard 0805 reflow profiles |
Pinout & Package
Package: SOD-323 - ultra-small plastic surface-mount case (1.2–1.4 mm width, 2.3–2.7 mm length), UL 94V-0 rated, moisture sensitivity level 1, cathode band polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to protected signal line or positive rail for clamping |
| Cathode | Forward current exit / reverse blocking terminal | Connected to reference (e.g., VCC or ground) to define clamping threshold |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Suppresses edge avalanche, improving ESD tolerance and long-term reliability under transient stress |
| Low forward voltage (290–370 mV) | Enables clamping of 1.8 V/3.3 V logic without pulling down valid high states |
| 2 pF junction capacitance | Maintains signal rise/fall times < 1 ns on 50 Ω traces up to 100 MHz |
| RoHS-compliant green compound | No intentionally added lead, halogens, or antimony; meets JEDEC J-STD-020D MSL Level 1 |
Applications
| USB 2.0 Data Line Protection | I²C Bus Level Translation |
|---|---|
Use Scenario: Bidirectional D+ and D− lines in portable USB peripherals exposed to ESD events. IC Role / Device Role / Timing Role: Passive clamping diode tied between data line and 3.3 V rail. Use Value: 40 V VRRM withstands ±8 kV contact ESD per IEC 61000-4-2; 2 pF CT avoids signal jitter. | Use Scenario: Voltage-level shifting between 1.8 V microcontroller and 3.3 V sensor on shared I²C bus. IC Role / Device Role / Timing Role: Forward-biased Schottky diode enabling asymmetric pull-up configuration. Use Value: 290–370 mV VF ensures reliable 1.8 V logic high detection at slave device input. |
| Low-Power Sensor Node Clamping | RF Detector Biasing |
Use Scenario: Analog front-end inputs of battery-operated environmental sensors subject to EMI-induced transients. IC Role / Device Role / Timing Role: Cathode-to-rail clamp protecting ADC input against overvoltage. Use Value: 0.2–0.5 µA IR minimizes quiescent current draw; guard ring prevents latch-up during fast transients. | Use Scenario: DC bias path in 900 MHz RF envelope detector circuits requiring minimal parasitic capacitance. IC Role / Device Role / Timing Role: Low-capacitance anode-to-ground path for RF coupling and DC return. Use Value: 2 pF CT avoids detuning of matching networks; 40 V rating supports typical 5 V detector supply rails. |
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 SOD-323 package; 30 V VRRM; 300–500 mV VF @ 10 mA | Lower reverse voltage margin; higher VF reduces clamping efficiency at low currents | Prefer when system rail ≤ 3.3 V and cost sensitivity outweighs 40 V margin |
| NSR0330HT1G | Same 40 V VRRM; SOD-323; 240–370 mV VF @ 1 mA; 1.5 pF CT | Slightly lower capacitance and VF; tighter VF distribution across temperature | Choose for high-volume production where tighter parametric control improves yield in USB 2.0 compliance testing |
Compared with BAT54C-7-F and NSR0330HT1G, SDMK0340L-7-F offers the highest reverse voltage headroom among SOD-323 Schottkys while maintaining competitive VF and CT-making it optimal for mixed-rail systems where 5 V tolerance and 3.3 V logic compatibility must coexist.
Availability
SDMK0340L-7-F is available at Aetrix Electronics and suitable for USB interface protection, I²C level translation, and low-power sensor node clamping requiring stable component supply across automotive infotainment, industrial IoT gateways, and medical wearable designs.
Supply support for SDMK0340L-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, specializing in high-reliability, application-optimized components for power management, signal integrity, and protection.
The SDMK series targets space-constrained, low-power signal-path protection-designed specifically for ESD-hardened digital interfaces in portable and battery-sensitive applications.
FAQ
What is the maximum continuous forward current rating for SDMK0340L-7-F?
The SDMK0340L-7-F is rated for 30 mA maximum continuous forward current (IF) at TA = 25 °C. Derating applies above 25 °C per the 625 °C/W thermal resistance; at 85 °C ambient, usable IF drops to approximately 12 mA to maintain junction temperature below 125 °C.
Does SDMK0340L-7-F have a specified reverse recovery time (trr)?
Yes-Figure 4 in the datasheet shows typical trr < 10 ns at IF = 10 mA. This value is derived from measured switching behavior under 8.3 ms half-sine surge conditions and confirms suitability for signal-line applications up to 480 Mbps without timing skew.
Can SDMK0340L-7-F be used in bidirectional ESD protection configurations?
No-it is a unidirectional Schottky diode with defined anode/cathode polarity. For bidirectional protection, two SDMK0340L-7-F devices must be placed in series opposition (anode-to-anode or cathode-to-cathode), or a dedicated bidirectional TVS like D3V3M1U2LP should be selected.
Is the SOD-323 package of SDMK0340L-7-F compatible with standard 0805 reflow profiles?
Yes-the SOD-323 package (1.2 × 2.5 mm) falls within IPC-7351B "SOIC-3" land pattern guidelines and is qualified for standard Pb-free reflow profiles (peak 260 °C, 60 sec max). Its MSL Level 1 rating permits unlimited floor life at ≤ 30 °C/60% RH.
SDMK0340L-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 500 nA @ 30 V
- Capacitance @ Vr, F:
- 2pF @ 1V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
- Operating Temperature - Junction:
- -40°C ~ 125°C
SDMK0340L-7-F FAQ
1.How can I place an order for SDMK0340L-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SDMK0340L-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 SDMK0340L-7-F reliable?
The price and inventory of SDMK0340L-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 SDMK0340L-7-F is usually 5 days.
3.What payment methods are accepted for SDMK0340L-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SDMK0340L-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SDMK0340L-7-F?
SDMK0340L-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SDMK0340L-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 SDMK0340L-7-F?
For technical support, including SDMK0340L-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SDMK0340L-7-F requirements.
6.How does Aetrix verify that SDMK0340L-7-F is sourced from the original manufacturer or authorized distributors?
All SDMK0340L-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 SDMK0340L-7-F meets industry standards.
7.What is the process for return or replacement of SDMK0340L-7-F?
All SDMK0340L-7-F units undergo pre-shipment inspection (PSI). If there is an issue with SDMK0340L-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 SDMK0340L-7-F part is unused and in its original packaging.
Return procedure for SDMK0340L-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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