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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Diodes Incorporated LLSD101C-7

Name: LLSD101C-7
Brand: Diodes Incorporated
SKU: LLSD101C-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LLSD101C-7

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

Package:: DO-213AC, MINI-MELF, SOD-80

Datasheet:: LLSD101C-7.pdf

Description:: SCHOTTKY SOD80 40V 0.015A 125C

Quantity:: RFQ Add To RFQ list

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Inventory:6,210

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Product details

Overview

LLSD101C-7 from Diodes Incorporated is a surface-mount Schottky barrier diode in MiniMELF glass package, rated for 40 V DC blocking voltage, 15 mA forward current, and 0.39 V forward voltage at 1.0 mA. It delivers fast 1.0 ns reverse recovery time and low 2.2 pF junction capacitance, suited for high-frequency signal demodulation and low-power RF detector circuits.

For engineers reviewing the LLSD101C-7 datasheet, LLSD101C-7 pinout, LLSD101C-7 application, or LLSD101C-7 equivalent, key selection criteria include its low VF at microamp bias, ultrafast trr, glass-body transient robustness via guard ring, and MiniMELF thermal resistance of 375 °C/W under FR-4 mounting conditions.

Technical Context

This Schottky diode employs a planar silicon die with guard ring passivation to suppress edge leakage and improve transient immunity. Its low barrier height enables sub-0.4 V conduction onset and minimal stored charge, enabling operation up to UHF frequencies without minority-carrier delay.

The MiniMELF glass package provides hermetic sealing and stable parasitic capacitance (2.2 pF at 0 V), while the Sn97.5Ag2.5 terminal finish ensures compatibility with lead-free reflow profiles per MIL-STD-202 Method 208.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	40 V - Maximum repetitive reverse voltage before breakdown; sets safe operating limit in clamping or detection circuits
V_F @ 1.0 mA	0.39 V - Low forward drop enables efficient signal rectification at micro-power bias levels
t_rr	1.0 ns - Enables use in >300 MHz RF envelope detection without phase distortion
C_T @ 0 V	2.2 pF - Predictable junction capacitance supports stable impedance matching in tuned circuits
R_JA	375 °C/W - Thermal resistance measured on FR-4 board; defines power derating above 25 °C ambient
I_F	15 mA continuous - Absolute maximum forward current under recommended pad layout and airflow

Pinout & Package

MiniMELF glass package (3.3–3.7 mm length × 1.3–1.6 mm diameter) with axial cathode band marking; two-terminal device with no internal leads or substrate connections.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction entry point	Connects to lower-potential node in rectifier or clamp; polarity must align with cathode band orientation
Cathode	Forward conduction exit / reverse blocking terminal	Marked by visible black band; ties to higher-potential node or ground reference in detector configurations

Key Features

Feature	Design Value
Guard ring construction	Suppresses edge leakage and improves ESD robustness without increasing series resistance
Low V_F at 1 mA	0.39 V enables reliable turn-on in battery-powered RF detectors with weak input signals
1.0 ns t_rr	Minimizes switching loss and timing skew in high-speed sampling and pulse shaping
RoHS-compliant Sn97.5Ag2.5 terminals	Ensures solder joint reliability under JEDEC J-STD-020C Level 1 moisture sensitivity

Applications

RF Signal Detector

Low-Power Clamping Circuit

Use Scenario: Demodulating AM/FM broadcast signals in portable receivers with <100 µA supply current.

IC Role / Device Role / Timing Role: Passive envelope detector converting RF carrier amplitude to baseband voltage.

Use Value: 0.39 V V_F at 1 mA ensures usable output swing even with weak antenna coupling and no active biasing.

Use Scenario: Protecting ADC inputs from transient overvoltage in sensor interface modules.

IC Role / Device Role / Timing Role: Fast-acting clamp limiting input excursions to ±0.4 V beyond rail.

Use Value: 1.0 ns t_rr prevents latch-up during nanosecond-scale transients while maintaining low leakage (<200 nA at 30 V).

High-Frequency Oscillator Tuning

Crystal Radio Front-End

Use Scenario: Varactor-less frequency stabilization in VCOs operating near 433 MHz ISM band.

IC Role / Device Role / Timing Role: Junction capacitance (2.2 pF) used as fixed tuning element in LC tank.

Use Value: Stable C_T vs. voltage curve (Fig. 2) ensures predictable resonance shift across temperature.

Use Scenario: Zero-bias crystal radio receiver requiring passive detection without battery.

IC Role / Device Role / Timing Role: Signal rectifier harvesting energy directly from ferrite antenna.

Use Value: Sub-0.4 V forward threshold enables conduction from sub-10 mV RF peaks, maximizing audio output volume.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky detector applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SD101CW-7	Same MiniMELF package; V_RWM = 40 V, V_F = 0.42 V @ 1 mA, t_rr = 1.2 ns	Slightly higher V_F and slower t_rr; optimized for general-purpose replacement	Select SD101CW-7 when long-term availability and RoHS+REACH compliance are prioritized over marginal speed/VF gain
BAT54C-7-F	SOT-23 package; dual common-cathode configuration; V_RWM = 30 V, V_F = 0.24 V @ 10 mA	Lower V_F but higher capacitance (10 pF); unsuitable for >100 MHz due to package parasitics	Choose BAT54C-7-F only for space-constrained PCBs where frequency <50 MHz and dual-diode topology is acceptable

Compared with LLSD101C-7, SD101CW-7 trades 0.03 V higher V_F and 0.2 ns slower t_rr for extended lifecycle support, while BAT54C-7-F sacrifices RF performance for integration density-neither matches the original's combination of ultrafast recovery, ultra-low capacitance, and glass-package stability.

Availability

LLSD101C-7 is available at Aetrix Electronics and suitable for RF detector design, low-power sensor clamping, crystal radio development, and high-frequency oscillator tuning requiring stable component supply and traceable sourcing.

Supply support for LLSD101C-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, specializing in high-reliability, high-efficiency components for power management, signal integrity, and protection.

The LLSD101x series belongs to Diodes' legacy Schottky detector family, engineered specifically for zero-bias and low-current RF signal processing in portable and battery-free systems.

FAQ

Is LLSD101C-7 suitable for zero-bias RF detection?

Yes. With a forward voltage of just 0.39 V at 1.0 mA and sub-nanosecond reverse recovery, it conducts reliably from weak RF signals without external bias-verified in crystal radio and AM detector applications per Diodes' application note AP02001.

What is the maximum operating temperature for continuous use?

The junction temperature range is –55 °C to +125 °C. Derating begins at 25 °C ambient, with full 15 mA current allowed only below 75 °C case temperature due to its 375 °C/W thermal resistance on standard FR-4 layout.

Does the MiniMELF package support automated optical inspection (AOI)?

Yes. The glass body and distinct cathode band provide high-contrast visual features compatible with standard AOI systems. Diodes' packaging specification AP02007 confirms alignment tolerance and band visibility requirements for pick-and-place and post-reflow verification.

Why is LLSD101C-7 marked "Not Recommended for New Designs"?

Diodes issued this notice because SD101CW-7 offers identical electrical specs with enhanced process control and longer projected lifecycle. LLSD101C-7 remains fully functional and supported for existing designs, but new projects should evaluate SD101CW-7 for long-term supply assurance.

LLSD101C-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: DO-213AC, MINI-MELF, SOD-80

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 40 V

Current - Average Rectified (Io):: 15mA

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 15 mA

Speed:: Small Signal =< 200mA (Io), Any Speed

Reverse Recovery Time (trr):: 1 ns

Current - Reverse Leakage @ Vr:: 200 nA @ 30 V

Capacitance @ Vr, F:: 2.2pF @ 0V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: Mini MELF

Operating Temperature - Junction:: -55°C ~ 125°C

LLSD101C-7 FAQ

1.How can I place an order for LLSD101C-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for LLSD101C-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 LLSD101C-7 reliable?

The price and inventory of LLSD101C-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LLSD101C-7 is usually 5 days.

3.What payment methods are accepted for LLSD101C-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LLSD101C-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LLSD101C-7?

LLSD101C-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LLSD101C-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 LLSD101C-7?

For technical support, including LLSD101C-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LLSD101C-7 requirements.

6.How does Aetrix verify that LLSD101C-7 is sourced from the original manufacturer or authorized distributors?

All LLSD101C-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 LLSD101C-7 meets industry standards.

7.What is the process for return or replacement of LLSD101C-7?

All LLSD101C-7 units undergo pre-shipment inspection (PSI). If there is an issue with LLSD101C-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 LLSD101C-7 part is unused and in its original packaging.

Return procedure for LLSD101C-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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