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Vishay General Semiconductor - Diodes Division SD103C-TAP
- Part No.:
- SD103C-TAP
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
SD103C-TAP.pdf
- Description:
- DIODE SCHOTTKY 20V 200MA DO35
- Quantity:
- Payment:
- Shipping:
Inventory:2,530
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Product details
Overview
SD103C-TAP from Vishay Semiconductors is a single silicon Schottky barrier diode in DO-35 (DO-204AH) package, rated for 20 V peak inverse voltage, 200 mA average forward current, and 600 mV forward voltage at 200 mA. It delivers 10 ns reverse recovery time and 50 pF junction capacitance, making it suitable for HF detection, MOSFET protection, and low-voltage battery charging circuits.
For engineers reviewing the SD103C-TAP datasheet, SD103C-TAP pinout, SD103C-TAP application, or SD103C-TAP equivalent, key selection criteria include its 20 V VR rating, low VF at high IF, fast trr, thermal resistance of 310 K/W, and DO-35 mechanical compatibility in space-constrained analog and power management designs.
Technical Context
The SD103C-TAP implements a metal-on-silicon Schottky structure with integrated PN junction guardring for improved reverse leakage control and ruggedness. Its low forward voltage drop stems from the Schottky barrier interface, not a conventional p-n junction.
It operates with a maximum junction temperature of 125 °C and requires thermal management per its 310 K/W junction-to-ambient thermal resistance. Reverse leakage is specified at VR = 10 V (5 μA max), reflecting its 20 V breakdown rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Inverse Voltage | 20 V - defines maximum reverse bias before breakdown; sets operating limit in clamping and blocking applications |
| Forward Voltage (IF = 200 mA) | 600 mV - enables low-loss conduction in battery-powered and efficiency-critical paths |
| Reverse Recovery Time | 10 ns - supports operation up to ~35 MHz switching in HF detector and steering circuits |
| Junction Capacitance | 50 pF at 0 V - impacts high-frequency impedance and signal coupling in RF detector nodes |
| Thermal Resistance JA | 310 K/W - requires PCB copper area or airflow for sustained 200 mA operation at ambient > 75 °C |
| Average Forward Current | 200 mA - continuous DC current handling capability under defined thermal conditions |
Pinout & Package
Package: DO-35 (DO-204AH), axial leaded glass-passivated case with black cathode band; 125 mg mass; 3.9 mm max body diameter; 26 mm min lead length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point under forward bias | Connected to lower-potential node in rectifier, clamp, or steering path |
| Cathode | Current exit point under forward bias; marked with black band | Connected to higher-potential node; polarity critical for protection and biasing function |
Key Features
| Feature | Design Value |
|---|---|
| Metal-on-silicon Schottky structure with PN guardring | Reduces surface leakage and improves reliability vs. unguarded Schottky diodes |
| Low VF (370 mV @ 20 mA) | Minimizes voltage loss in logic-level biasing and signal coupling paths |
| Fast trr (10 ns) | Enables use in HF detector and high-speed switching without tail current issues |
| DO-35 package with black cathode band | Provides visual polarity identification and legacy through-hole compatibility |
Applications
| HF Detector | Protection Circuit |
|---|---|
Use Scenario: Demodulating AM signals in portable radio front-ends or RF sensor receivers. IC Role / Device Role / Timing Role: Signal rectification and envelope extraction at frequencies up to 100 MHz. Use Value: 50 pF capacitance and 10 ns trr preserve signal integrity; 370 mV VF ensures sensitivity at microamp input levels. | Use Scenario: Clamping gate-source voltage of MOSFETs during inductive switching transients. IC Role / Device Role / Timing Role: Fast-acting voltage limiter preventing gate oxide overstress. Use Value: 20 V VR and 10 ns trr enable reliable suppression of <100 ns spikes without oscillation. |
| Small Battery Charger | AC/DC Converter |
Use Scenario: Blocking reverse current from NiMH/Li-ion cells during trickle-charge termination. IC Role / Device Role / Timing Role: Unidirectional current valve in low-voltage (<3 V) charge path. Use Value: 600 mV VF minimizes voltage drop across diode, preserving usable cell voltage under 200 mA load. | Use Scenario: Output rectification in low-power offline flyback or buck-derived AC/DC supplies. IC Role / Device Role / Timing Role: Secondary-side freewheeling and output rectifier. Use Value: 200 mA IFAV and 400 mW Ptot support continuous operation in <5 W adapters with minimal heatsinking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SD103B-TAP | 30 V VR, same VF/trr/package | Higher reverse standoff; slightly higher IR at 20 V | Select when system reverse stress exceeds 20 V but remains ≤30 V |
| BAT54C-TA | SOD-323 package, dual common-cathode configuration, 30 V VR | Surface-mount only; not pin-compatible; higher density layout | Choose for space-constrained PCBs where DO-35 leads are impractical |
Compared with SD103B-TAP and BAT54C-TA, SD103C-TAP offers the lowest VR (20 V) and smallest forward voltage at low currents among the SD103 family, making it optimal for ultra-low-voltage battery systems where reverse margin is tightly controlled and conduction loss must be minimized.
Availability
SD103C-TAP is available at Aetrix Electronics and suitable for HF detector design, MOSFET gate protection, and small battery charger circuits requiring stable component supply and long-term obsolescence management.
Supply support for SD103C-TAP 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
Vishay Semiconductors is a global manufacturer specializing in discrete semiconductors and passive components, with core expertise in diodes, MOSFETs, and resistors for industrial, automotive, and computing markets.
The SD103 series belongs to Vishay's small-signal Schottky diode product line, engineered for low-loss, high-speed signal routing and protection in compact analog and power interfaces.
FAQ
What is the peak inverse voltage rating of SD103C-TAP?
The SD103C-TAP has a peak inverse voltage (VR) rating of 20 V, verified per Vishay's datasheet Document Number 85754. This value is strictly applicable to the SD103C variant and reflects its guaranteed reverse breakdown threshold under standard test conditions (IR = 50 μA). Exceeding 20 V risks irreversible avalanche failure.
Does SD103C-TAP have a specified reverse recovery time?
Yes, SD103C-TAP has a typical reverse recovery time (trr) of 10 ns, measured under IF = IR = 50 mA to 200 mA with recovery to 0.1 IR. This parameter is confirmed in the "Electrical Characteristics" table of the official Vishay datasheet and applies directly to the SD103C-TAP ordering variant.
What package type is used for SD103C-TAP?
SD103C-TAP uses the DO-35 (also designated DO-204AH) axial-leaded glass package, with mechanical dimensions documented in Vishay's SB-V-3906.04-031(4). The cathode is identified by a black band, and the part is supplied in ammopack format (10 k per tape, 50 k per box).
How does SD103C-TAP differ from SD103A-TAP and SD103B-TAP?
SD103C-TAP differs from SD103A-TAP (40 V VR) and SD103B-TAP (30 V VR) solely in its peak inverse voltage rating-20 V-while sharing identical forward voltage, reverse recovery time, capacitance, package, and thermal characteristics. All three share the same DO-35 package and marking "SD103C".
Is SD103C-TAP suitable for use in HF detector applications?
Yes, SD103C-TAP is explicitly listed in Vishay's Applications section for HF-detector use. Its 10 ns trr and 50 pF junction capacitance support reliable demodulation up to VHF frequencies, and its 370 mV VF at 20 mA ensures high sensitivity in low-signal-level detection circuits.
SD103C-TAP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Box (TB)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 20 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 600 mV @ 200 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 10 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 10 V
- Capacitance @ Vr, F:
- 50pF @ 0V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
- Operating Temperature - Junction:
- 125°C (Max)
SD103C-TAP FAQ
1.How can I place an order for SD103C-TAP through Aetrix?
Please submit a Request for Quotation (RFQ) for SD103C-TAP 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 SD103C-TAP reliable?
The price and inventory of SD103C-TAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SD103C-TAP is usually 5 days.
3.What payment methods are accepted for SD103C-TAP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD103C-TAP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD103C-TAP?
SD103C-TAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD103C-TAP 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 SD103C-TAP?
For technical support, including SD103C-TAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD103C-TAP requirements.
6.How does Aetrix verify that SD103C-TAP is sourced from the original manufacturer or authorized distributors?
All SD103C-TAP 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 SD103C-TAP meets industry standards.
7.What is the process for return or replacement of SD103C-TAP?
All SD103C-TAP units undergo pre-shipment inspection (PSI). If there is an issue with SD103C-TAP, 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 SD103C-TAP part is unused and in its original packaging.
Return procedure for SD103C-TAP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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