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Diodes Incorporated SD101A-A
- Part No.:
- SD101A-A
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
SD101A-A.pdf
- Description:
- DIODE SCHOTTKY 60V 15MA DO35
- Quantity:
- Payment:
- Shipping:
Inventory:7,725
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Product details
Overview
SD101A-A from Diodes Incorporated is a glass-encapsulated Schottky barrier diode in DO-35 package, rated for 60 V peak repetitive reverse voltage, 15 mA forward continuous current, and featuring low forward voltage drop (0.41 V @ 1 mA), 1.0 ns reverse recovery time, and 2.0 pF total capacitance at 0 V - used in high-speed signal clamping and RF detector circuits.
For engineers reviewing the SD101A-A datasheet, SD101A-A pinout, SD101A-A application, or SD101A-A equivalent, key selection criteria include its low trr for fast switching, guard ring construction for transient immunity, DO-35 mechanical compatibility, and cathode-band polarity marking - critical for ESD-sensitive analog front-ends and low-current bias networks.
Technical Context
This discrete Schottky diode leverages platinum-silicide or similar low-barrier metallization to achieve sub-0.45 V forward voltage at low currents, enabling efficient signal rectification in battery-powered RF detectors. Its guard ring structure provides enhanced ruggedness against voltage transients without requiring external TVS components.
The DO-35 glass package ensures hermetic sealing and stable junction temperature behavior up to +175°C, while the 375°C/W junction-to-ambient thermal resistance reflects its suitability for low-power, non-heatsinked applications where self-heating must remain below 15°C at rated IF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 60 V - supports blocking of transient spikes up to 60 V in signal path protection without avalanche breakdown |
| IFM | 15 mA - maximum continuous forward current compatible with low-power biasing and detector load conditions |
| VFM | 0.41 V @ 1 mA - enables minimal forward conduction loss in precision RF envelope detection |
| trr | 1.0 ns - ensures negligible switching delay in UHF receiver limiter and sampling gate applications |
| CT | 2.0 pF @ 0 V, 1 MHz - maintains high-frequency impedance integrity above 100 MHz in tuned circuit interfaces |
| RθJA | 375 °C/W - limits self-heating to <6°C rise at 10 mA DC, suitable for ambient-trace-limited PCB layouts |
Pinout & Package
DO-35 glass axial package with cathode band marking; leads are matte tin-plated, solderable per MIL-STD-202 Method 208. Polarity is unambiguous: banded end = cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward current entry point | Connected to higher-potential node in clamp/detector; requires no series resistor for 15 mA operation |
| Cathode (banded end) | Forward current exit / reverse blocking terminal | Ground or reference node connection; guards against reverse leakage in AC-coupled signal paths |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage drop | 0.41 V @ 1 mA - reduces detector threshold error and improves small-signal sensitivity in RF demodulators |
| Guard ring construction | Integrated edge termination - suppresses surface leakage and improves reliability under humidity or contamination |
| Low reverse recovery time | 1.0 ns - eliminates minority-carrier storage delay, enabling clean switching in >500 MHz sampling circuits |
| Low reverse capacitance | 2.0 pF - preserves Q-factor in LC tank circuits and minimizes detuning in VCO buffer stages |
Applications
| RF Detector Circuit | ESD-Sensitive Signal Clamp |
|---|---|
Use Scenario: Demodulating AM/ASK signals in 315–433 MHz ISM-band receivers using passive envelope detection. IC Role / Device Role / Timing Role: Signal rectifier and DC restoration element in diode detector topology. Use Value: Sub-0.45 V VFM ensures accurate low-amplitude envelope capture; 1.0 ns trr prevents distortion at modulation edges. | Use Scenario: Protecting ADC input pins from ±8 kV HBM ESD events in portable medical sensors. IC Role / Device Role / Timing Role: Fast-turn-on shunt clamp diverting transient current before IC damage threshold. Use Value: Guard ring structure sustains clamping performance over 1000+ ESD strikes; DO-35 allows direct placement at connector interface. |
| Low-Power Bias Network | High-Frequency Sampling Gate |
Use Scenario: Providing temperature-stable bias current to JFET amplifiers in ultra-low-power IoT sensor nodes. IC Role / Device Role / Timing Role: Precision current source element via forward-biased diode drop across high-value resistor. Use Value: Stable 0.41 V drop at 1 mA enables predictable bias current; -65°C to +175°C rating supports extended environmental operation. | Use Scenario: Gating clock-sampled data in 100+ MSPS oscilloscope front-ends using passive sampling architecture. IC Role / Device Role / Timing Role: Ultrafast switch controlling charge injection into hold capacitor. Use Value: 1.0 ns trr and 2.0 pF CT minimize aperture jitter and sampling skew; DO-35 layout symmetry aids matched trace routing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SD101AW-A | Same DO-35 package; improved IR spec (≤100 nA @ VR=50 V vs. 200 nA); RoHS-compliant matte tin finish | Lower leakage enables longer hold-time in sample-and-hold circuits; preferred for new designs per manufacturer notice | Select SD101AW-A when long-term stability and reduced dark current are required in precision analog sampling |
| BAT54-A | SOT-23 package; 30 V VRRM; 200 mA IFM; 0.24 V VFM @ 10 mA; 5 ns trr | Higher current capability but slower switching; unsuitable for >100 MHz signal paths due to trr and package parasitics | Choose BAT54-A only for low-frequency clamping or power rail steering where DO-35 footprint is not mandatory |
Compared with SD101AW-A, the SD101A-A offers identical form factor but higher IR and older process; versus BAT54-A, it delivers superior high-frequency response and lower capacitance despite lower current rating - making it irreplaceable in UHF detector and nanosecond-gate roles.
Availability
SD101A-A is available at Aetrix Electronics and suitable for RF detector circuits, ESD-sensitive signal clamps, low-power bias networks, and high-frequency sampling gates requiring stable component supply and legacy design continuity.
Supply support for SD101A-A 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 US.
The SD101x series belongs to Diodes' general-purpose Schottky diode product line, engineered specifically for high-speed, low-leakage signal conditioning in RF, instrumentation, and portable electronics.
FAQ
Is SD101A-A lead-free and RoHS compliant?
Yes. SD101A-A features a matte tin lead finish and complies with EU Directive 2002/95/EC (RoHS), with all applicable exemptions applied per Annex notes. The device meets MIL-STD-202 solderability requirements and carries J-STD-020D Level 1 moisture sensitivity rating.
What is the maximum operating temperature for SD101A-A?
The SD101A-A has an operating and storage temperature range of –65°C to +175°C. Its glass DO-35 package and silicon die construction allow reliable function at elevated ambient temperatures, provided power dissipation remains within the 400 mW limit and thermal resistance constraints are observed.
Can SD101A-A be used in place of SD101B-A or SD101C-A?
Yes, with voltage derating. SD101A-A (60 V VRRM) may substitute for SD101B-A (50 V) or SD101C-A (40 V) where reverse voltage margin is sufficient. However, forward voltage and capacitance differ slightly; verify VFM and CT impact on detector linearity and frequency response in the target circuit.
Why is SD101A-A marked "Not Recommended for New Design"?
Diodes Incorporated recommends SD101AW–SD101CW variants for new designs due to improved reverse leakage (IRM ≤100 nA), tighter parameter distributions, and updated process controls - though SD101A-A remains fully functional and supported for legacy repair and continuity programs.
SD101A-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- 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 FAQ
1.How can I place an order for SD101A-A through Aetrix?
Please submit a Request for Quotation (RFQ) for SD101A-A 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 reliable?
The price and inventory of SD101A-A 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 is usually 5 days.
3.What payment methods are accepted for SD101A-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD101A-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD101A-A?
SD101A-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD101A-A 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?
For technical support, including SD101A-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD101A-A requirements.
6.How does Aetrix verify that SD101A-A is sourced from the original manufacturer or authorized distributors?
All SD101A-A 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 meets industry standards.
7.What is the process for return or replacement of SD101A-A?
All SD101A-A units undergo pre-shipment inspection (PSI). If there is an issue with SD101A-A, 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 part is unused and in its original packaging.
Return procedure for SD101A-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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