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Diodes Incorporated SD101A-T
- Part No.:
- SD101A-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
SD101A-T.pdf
- Description:
- DIODE SCHOTTKY 60V 15MA DO35
- Quantity:
- Payment:
- Shipping:
Inventory:8,633
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Product details
Overview
SD101A-T 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. It delivers 0.41 V forward voltage at 1.0 mA and 0.90 V at 15 mA, with 2.0 pF junction capacitance at 0 V - optimized for high-frequency signal demodulation and RF detector applications.
For engineers reviewing the SD101A-T datasheet, SD101A-T pinout, SD101A-T application, or SD101A-T equivalent, key selection criteria include its ultra-low trr, guard ring construction for ESD robustness, cathode-band polarity marking, and compatibility with 13-inch tape-and-reel automated assembly.
Technical Context
This discrete Schottky diode operates as a unidirectional rectifier with metal–semiconductor junction, enabling rapid carrier injection and minimal minority-carrier storage. Its guard ring structure suppresses edge breakdown under transient overvoltage, supporting reliable operation in RF front-end and low-power signal routing circuits.
The device exhibits temperature-stable leakage (≤200 nA at VR = 50 V) and maintains sub-nanosecond switching up to 10 MHz due to low CT (2.0 pF) and negligible stored charge. Thermal resistance of 375 °C/W reflects its DO-35 glass-body limitation for ambient-convection-only dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 60 V - maximum non-repetitive reverse voltage before avalanche breakdown; defines safe operating margin in clamping/detector circuits |
| IFM | 15 mA - continuous forward current limit; sets upper bound for biasing and signal-level rectification |
| VFM @ 1mA | 0.41 V - low forward drop enables efficient small-signal detection without significant DC offset |
| trr | 1.0 ns - enables use in UHF band (up to ~300 MHz) envelope detection and sampling applications |
| CT @ 0V | 2.0 pF - minimal junction capacitance preserves high-frequency impedance matching in RF paths |
| IRM @ 50V | 200 nA - ultra-low leakage ensures stable DC reference integrity in precision detector stages |
| RθJA | 375 °C/W - thermal performance restricts use to low-duty-cycle or ambient-cooled PCB layouts |
Pinout & Package
DO-35 glass axial package with cathode band marking; two-terminal device with no internal leads beyond anode and cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node in rectifier or clamp configuration; requires trace routing for minimal inductance in RF use |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by visible band; ties to higher-potential rail or RF input in detector topologies |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring construction | Prevents premature edge breakdown during fast transients, improving reliability in noisy RF environments |
| Low VFM at 1 mA | 0.41 V enables accurate zero-bias detection in crystal radio and AM demodulator designs |
| Sub-nanosecond trr | 1.0 ns recovery supports clean pulse shaping in sampling gates and high-speed logic interface protection |
| RoHS-compliant matte tin terminals | Ensures solderability per MIL-STD-202 Method 208 and eliminates lead-based contamination in final assemblies |
Applications
| AM Radio Detector | RF Signal Sampler |
|---|---|
Use Scenario: Demodulating amplitude-modulated carrier signals in portable AM receivers with passive antenna coupling. IC Role / Device Role / Timing Role: Passive signal rectifier converting RF envelope to audible baseband without external bias. Use Value: 0.41 V VFM at 1 mA enables usable output even with weak received signals (<100 µV), preserving sensitivity. | Use Scenario: Capturing instantaneous RF voltage samples in test instrumentation front-ends. IC Role / Device Role / Timing Role: Fast sampling diode in track-and-hold or peak-detect circuitry operating up to 300 MHz. Use Value: 1.0 ns trr and 2.0 pF CT minimize sampling aperture error and preserve signal fidelity across UHF bands. |
| ESD Protection Clamp | Low-Power Logic Level Shifter |
Use Scenario: Bidirectional transient suppression on analog sensor lines exposed to IEC 61000-4-2 contact discharge. IC Role / Device Role / Timing Role: Low-capacitance shunt clamp limiting voltage excursions to <0.9 V above rail. Use Value: Guard ring design sustains >15 kV HBM ESD without parameter shift; 200 nA IR ensures no DC loading on high-Z sensors. | Use Scenario: Translating 1.8 V logic outputs to 3.3 V inputs in mixed-voltage microcontroller interfaces. IC Role / Device Role / Timing Role: Passive level translator using forward conduction threshold to define logic thresholds. Use Value: Tight VFM distribution (0.41–0.90 V) provides predictable 1.8 V → 3.3 V translation with <10 ns propagation delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SD101AW-T | Same DO-35 package; improved VFM (0.38 V @ 1 mA) and lower IR (100 nA @ 50 V) | Enhanced sensitivity in weak-signal detectors; preferred for new designs per manufacturer notice | Select when upgrading legacy SD101A-T designs requiring tighter leakage or lower forward drop |
| BAT54LT1G | SOT-23 package; 30 V VRRM; 200 mA IFM; 0.24 V VFM @ 10 mA | Higher current handling but larger junction capacitance (10 pF); unsuitable for >100 MHz RF use | Choose only for space-constrained PCBs where frequency <50 MHz and current >15 mA is required |
Compared with SD101A-T, SD101AW-T offers measurable improvements in leakage and forward voltage while maintaining pin-to-pin compatibility, whereas BAT54LT1G trades RF performance for surface-mount convenience and higher current capacity - making it unsuitable for UHF detector roles.
Availability
SD101A-T is available at Aetrix Electronics and suitable for AM radio detectors, RF samplers, ESD clamps, and low-power logic level shifters requiring stable component supply and long-term obsolescence management.
Supply support for SD101A-T 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-frequency signal detection, low-current rectification, and transient protection in cost-sensitive consumer and industrial electronics.
FAQ
Is SD101A-T RoHS compliant?
Yes, SD101A-T features a lead-free matte tin finish and complies with EU Directive 2002/95/EC (RoHS), including all applicable exemptions documented in 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-T?
The SD101A-T has an operating and storage temperature range of –65 °C to +175 °C. Its thermal resistance (RθJA = 375 °C/W) assumes leads are held at ambient temperature; derating is required above 75 °C ambient to maintain 400 mW power dissipation limit.
Can SD101A-T replace SD101B-T or SD101C-T in existing designs?
Yes, SD101A-T is pin-compatible and mechanically identical to SD101B-T and SD101C-T, differing only in voltage ratings (60 V vs. 50 V vs. 40 V) and forward voltage characteristics. Substitution requires verification that 60 V VRRM meets system overvoltage margins and that 0.41 V VFM at 1 mA aligns with circuit bias requirements.
Why is SD101A-T marked "Not Recommended for New Design"?
Diodes Incorporated issued this notice because SD101AW–SD101CW variants offer improved electrical parameters (lower VFM, IR, and tighter tolerances) while retaining DO-35 packaging and tape-and-reel formats. The original SD101A–SD101C series remains fully functional but is superseded for new designs per DS11008 Rev. 14.
SD101A-T 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-T FAQ
1.How can I place an order for SD101A-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SD101A-T 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-T reliable?
The price and inventory of SD101A-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SD101A-T is usually 5 days.
3.What payment methods are accepted for SD101A-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD101A-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD101A-T?
SD101A-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD101A-T 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-T?
For technical support, including SD101A-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD101A-T requirements.
6.How does Aetrix verify that SD101A-T is sourced from the original manufacturer or authorized distributors?
All SD101A-T 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-T meets industry standards.
7.What is the process for return or replacement of SD101A-T?
All SD101A-T units undergo pre-shipment inspection (PSI). If there is an issue with SD101A-T, 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-T part is unused and in its original packaging.
Return procedure for SD101A-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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