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Diodes Incorporated SD101A-A-F
- Part No.:
- SD101A-A-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
SD101A-A-F.pdf
- Description:
- DIODE SCHOTTKY 60V 15MA DO35
- Quantity:
- Payment:
- Shipping:
Inventory:5,843
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Product details
Overview
SD101A-A-F from Diodes Incorporated is a low-leakage, fast-switching Schottky barrier diode in DO-35 glass package, rated for 60 V peak repetitive reverse voltage, 15 mA forward current, and 1.0 ns reverse recovery time, used in high-frequency signal demodulation and low-power RF detector circuits.
For engineers reviewing the SD101A-A-F datasheet, SD101A-A-F pinout, SD101A-A-F application, or SD101A-A-F equivalent, key selection criteria include its 0.39 V forward voltage at 15 mA, 2.0 pF junction capacitance at 0 V, cathode-band polarity marking, glass-case transient robustness, and RoHS-compliant matte tin terminals.
Technical Context
This discrete Schottky diode employs guard ring construction to suppress edge breakdown and improve transient immunity, enabling stable operation in low-current, high-speed switching roles where minimal stored charge and low capacitive loading are critical.
Its 375 °C/W junction-to-ambient thermal resistance and 400 mW power dissipation rating assume leads held at ambient temperature; it operates across –65 °C to +175 °C and exhibits <200 nA peak reverse current at 50 V DC blocking voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 60 V - Maximum repetitive reverse voltage before avalanche conduction begins; defines safe DC/peak AC blocking range in signal path applications. |
| VFM @ 15 mA | 0.39 V - Forward voltage drop at rated continuous current; enables ultra-low-loss rectification in battery-powered RF detectors. |
| trr | 1.0 ns - Reverse recovery time under 5 mA IF/IR conditions; supports >300 MHz small-signal switching without tail current distortion. |
| CT @ 0 V | 2.0 pF - Junction capacitance at zero bias; minimizes signal coupling loss and phase shift in UHF mixer and detector nodes. |
| IRM @ 50 V | 200 nA - Peak reverse leakage at rated VR; ensures negligible dark current in precision sampling and low-duty-cycle pulse detection. |
| RθJA | 375 °C/W - Thermal resistance with leads at ambient; requires minimal PCB copper area for thermal management in low-power surface-mount layouts. |
Pinout & Package
DO-35 glass axial package with cathode band marking; two-terminal device with no internal bonding variations across SD101A–C variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node in rectifier or clamp configuration; unmarked end of DO-35 body. |
| Cathode | Forward current exit / reverse blocking terminal | Marked with visible band; ties to higher-potential node or ground reference in detector circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring construction | Suppresses edge leakage and improves surge tolerance during ESD transients in unshielded RF front ends. |
| Low VFM at 15 mA | 0.39 V enables >90% rectification efficiency in 1.5 V supply-limited crystal radio and RFID tag detectors. |
| Sub-2 pF junction capacitance | 2.0 pF at 0 V allows direct integration into 900 MHz antenna matching networks without detuning. |
| 1.0 ns trr | Enables clean zero-crossing switching in 100+ MHz envelope detection without recovery-induced overshoot. |
Applications
| RF Signal Detector | Low-Power Clamp Circuit |
|---|---|
Use Scenario: Demodulating AM signals in portable shortwave receivers with passive antennas and no local oscillator. IC Role / Device Role / Timing Role: Passive signal rectifier converting RF envelope to baseband audio; no bias or clock required. Use Value: 0.39 V VFM preserves weak-signal sensitivity; 2.0 pF CT avoids resonant nulls near 1 GHz operating bands. | Use Scenario: Protecting ADC input pins from ESD-induced overvoltage in handheld test equipment. IC Role / Device Role / Timing Role: Bidirectional clamping diode shunting transients to rail while remaining transparent at DC. Use Value: Guard ring structure sustains >2 kV HBM without parametric shift; 200 nA IR prevents DC offset drift. |
| Crystal Radio Detector | High-Frequency Sampling Gate |
Use Scenario: Rectifying induced RF from ferrite loopstick antenna in battery-free crystal radios. IC Role / Device Role / Timing Role: Zero-bias Schottky detector generating audible output without external power. Use Value: Sub-400 mV forward threshold enables usable output from <100 µV EMF; DO-35 glass body resists humidity-induced leakage. | Use Scenario: Gating analog sample pulses in 100 MSPS data acquisition front ends. IC Role / Device Role / Timing Role: Fast turn-off switch isolating hold capacitor during non-sampling intervals. Use Value: 1.0 ns trr limits aperture uncertainty to <0.5% of 10 ns sampling window; low CT avoids charge injection error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SD101AW | Same DO-35 package but wafer-level optimized for lower VFM (0.35 V @ 15 mA) and tighter IR spread (100 nA max @ 50 V). | Preferred for new designs requiring improved sensitivity in sub-1 µW RF detection. | Select SD101AW when replacing SD101A-A-F in production builds targeting extended battery life or lower noise floor. |
| BAT54 | SOT-23 package, 30 V VRRM, 200 mA IF, 0.24 V VFM @ 10 mA, 10 pF CT - higher current but larger capacitance and different footprint. | Suitable for board space-constrained logic-level clamping, not RF detector replacement. | Choose BAT54 only if layout allows SOT-23 rework and system tolerates 5× higher junction capacitance. |
Compared with SD101AW and BAT54, SD101A-A-F offers optimal balance of ultra-low capacitance and axial through-hole reliability for legacy RF detector assemblies, whereas SD101AW improves sensitivity in new designs and BAT54 trades capacitance for current handling in digital I/O protection.
Availability
SD101A-A-F is available at Aetrix Electronics and suitable for RF signal detection, low-power clamping, crystal radio demodulation, and high-frequency sampling gate applications requiring stable component supply and long-term obsolescence support.
Supply support for SD101A-A-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, cost-optimized components for consumer, industrial, and communications markets.
The SD101x series targets high-frequency signal conditioning applications where low capacitance, fast recovery, and stable leakage are essential-particularly in passive RF systems and ESD-sensitive analog interfaces.
FAQ
Is SD101A-A-F lead-free and RoHS compliant?
Yes. SD101A-A-F features a matte tin finish on leads and complies with EU Directive 2002/95/EC (RoHS), including all applicable exemptions documented in Annex Notes. Moisture sensitivity is rated Level 1 per J-STD-020D, confirming suitability for standard SMT reflow without baking.
What is the maximum operating temperature for SD101A-A-F?
The SD101A-A-F has an operating and storage temperature range of –65 °C to +175 °C. Its glass DO-35 package and guard ring design maintain stable reverse leakage and forward voltage characteristics across this full range, verified per JEDEC JESD22-A108.
Can SD101A-A-F be used as a replacement for 1N5711?
Yes, SD101A-A-F is a functional replacement for 1N5711 in most applications: both are DO-35 Schottky diodes with comparable VRRM (60 V vs. 70 V), VFM (~0.39 V vs. ~0.42 V), and trr (~1 ns vs. ~1 ns). However, SD101A-A-F specifies tighter IR (200 nA vs. 500 nA) and lower CT (2.0 pF vs. 2.5 pF), improving RF detector SNR.
Why is SD101A-A-F marked "Not Recommended for New Design"?
Diodes Incorporated issued this notice because SD101AW–SD101CW variants offer improved process control, tighter VFM/IR distributions, and enhanced wafer-level ESD robustness. SD101A-A-F remains fully qualified and supported for legacy repair and continuity builds, but new designs should use SD101AW for better yield and specification margin.
SD101A-A-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 60 V
- Current - Average Rectified (Io):
- 15mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 15 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 1 ns
- Current - Reverse Leakage @ Vr:
- 200 nA @ 50 V
- Capacitance @ Vr, F:
- 2pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
- Operating Temperature - Junction:
- -65°C ~ 175°C
SD101A-A-F FAQ
1.How can I place an order for SD101A-A-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SD101A-A-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 SD101A-A-F reliable?
The price and inventory of SD101A-A-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SD101A-A-F is usually 5 days.
3.What payment methods are accepted for SD101A-A-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD101A-A-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD101A-A-F?
SD101A-A-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD101A-A-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 SD101A-A-F?
For technical support, including SD101A-A-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD101A-A-F requirements.
6.How does Aetrix verify that SD101A-A-F is sourced from the original manufacturer or authorized distributors?
All SD101A-A-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 SD101A-A-F meets industry standards.
7.What is the process for return or replacement of SD101A-A-F?
All SD101A-A-F units undergo pre-shipment inspection (PSI). If there is an issue with SD101A-A-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 SD101A-A-F part is unused and in its original packaging.
Return procedure for SD101A-A-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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