My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SD101B-TR
- Part No.:
- SD101B-TR
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
SD101B-TR.pdf
- Description:
- DIODE SCHOTTKY 50V 30MA DO35
- Quantity:
- Payment:
- Shipping:
Inventory:49,921
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SD101B-TR from Vishay Semiconductors is a single silicon Schottky diode in DO-35 (DO-204AH) package, rated for 50 V reverse voltage, 400 mV forward voltage at 1 mA, 2.1 pF capacitance at 0 V, 200 nA leakage at 40 V, and 30 mA continuous forward current. It serves as a low-loss rectifier or signal detector in compact, low-voltage power and RF circuits.
For engineers reviewing the SD101B-TR datasheet, SD101B-TR pinout, SD101B-TR application, or SD101B-TR equivalent, key selection criteria include its low VF/low CD trade-off versus SD101A/SD101C variants, DO-35 thermal resistance (320 K/W), and suitability for HF detection and battery-charger protection where leakage and switching speed are critical.
Technical Context
This discrete Schottky diode uses a planar epitaxial construction with integrated protection ring to suppress ESD-induced failure. Its low barrier height enables sub-400 mV conduction at microamp-level currents while maintaining <2.2 pF junction capacitance - essential for high-frequency detector linearity and fast recovery in DC/DC feedback paths.
The device operates within -65 °C to +150 °C storage range and 125 °C maximum junction temperature. Thermal resistance of 320 K/W (junction-to-ambient, free-air) limits usable power dissipation to 310 mW at 25 °C ambient, requiring derating above 25 °C per the linear derating curve in the Vishay datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 50 V - defines maximum blocking capability before breakdown in protection or clamping roles |
| Forward Voltage (VF) | 400 mV @ 1 mA - enables efficient rectification in sub-1 V supply rails and low-power detectors |
| Diode Capacitance (CD) | 2.1 pF @ 0 V, 1 MHz - supports >100 MHz HF detection without excessive signal loading |
| Leakage Current (IR) | 200 nA @ 40 V - ensures minimal standby loss in battery-backed circuits and precision bias networks |
| Continuous Forward Current (IF) | 30 mA - sets upper limit for steady-state conduction in small-signal rectification and charging paths |
| Thermal Resistance (RthJA) | 320 K/W - requires layout-aware heatsinking or power derating above 25 °C ambient |
Pinout & Package
Package: DO-35 (DO-204AH), axial leaded glass-passivated case with black cathode band; 3.9 mm max body diameter, 26 mm min lead length, 1.7 mm cathode band width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal for forward conduction | Connected to lower-potential side in rectifier configuration; accepts up to 30 mA continuous current |
| Cathode | Negative terminal; marked by black band | Reference node for reverse-biased operation; must remain ≤50 V below anode to avoid breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Integrated ESD protection ring | Prevents gate oxide damage during handling; eliminates need for external TVS in low-energy signal paths |
| Low forward voltage drop | 400 mV at 1 mA enables operation in 0.5–1.2 V battery systems without significant voltage loss |
| Low junction capacitance | 2.1 pF allows use in 100+ MHz detector stages without detuning resonant circuits |
| Low leakage current | 200 nA at 40 V supports multi-year battery life in always-on sensor nodes and backup power monitors |
Applications
| HF Detector | Small Battery Charger |
|---|---|
Use Scenario: Demodulating AM signals or detecting RF envelope in portable radios and RFID readers. IC Role / Device Role / Timing Role: Signal rectifier converting RF AC to baseband DC with minimal distortion. Use Value: 2.1 pF capacitance and 400 mV VF preserve signal fidelity and sensitivity at frequencies up to 200 MHz. | Use Scenario: Trickle-charging lithium coin cells or NiMH batteries in wearables and IoT sensors. IC Role / Device Role / Timing Role: Reverse-blocking diode preventing battery discharge through charging circuitry. Use Value: 200 nA leakage minimizes self-discharge; 50 V VR accommodates transient spikes in unregulated chargers. |
| Protection Circuit | DC/DC Converter for Notebooks |
Use Scenario: Input polarity reversal and transient overvoltage clamping in USB-powered peripherals. IC Role / Device Role / Timing Role: Low-leakage series blocking element and clamp diode in front-end protection ICs. Use Value: Integrated ESD ring withstands ±8 kV HBM, reducing BOM count versus discrete TVS + Schottky combos. | Use Scenario: Synchronous rectification or feedback path sensing in 5–12 V notebook DC/DC converters. IC Role / Device Role / Timing Role: Secondary-side rectifier or voltage-sense diode in flyback or buck converter feedback loops. Use Value: 30 mA IF rating and 320 K/W RthJA support continuous operation in thermally constrained laptop PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SD101A-TR | 60 V VR, 410 mV VF @ 1 mA, 2.0 pF CD | Higher reverse margin but slightly higher VF; better for 5–12 V input protection | Select when system transients exceed 50 V but sub-400 mV VF is not mandatory |
| SD101C-TR | 40 V VR, 390 mV VF @ 1 mA, 2.2 pF CD | Lower VF and VR; optimized for ≤3.3 V battery systems with tighter voltage headroom | Select when minimizing forward loss is critical and reverse stress stays below 40 V |
Compared with SD101A-TR and SD101C-TR, SD101B-TR strikes a balanced trade-off: 50 V VR provides robustness against common 24 V rail transients, while 400 mV VF and 2.1 pF CD maintain high-frequency efficiency - making it optimal for 3.3–5 V portable power and RF detector designs.
Availability
SD101B-TR is available at Aetrix Electronics and suitable for HF detector modules, small battery charger circuits, and DC/DC converter feedback paths requiring stable component supply across industrial, computing, and consumer electronics programs.
Supply support for SD101B-TR 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 Intertechnology is a global semiconductor manufacturer specializing in discrete components, passive elements, and sensors, with emphasis on reliability, precision, and power efficiency.
The SD101x family belongs to Vishay's small-signal Schottky diode product line, engineered for high-speed, low-loss operation in space-constrained, low-voltage applications such as portable electronics and RF signal conditioning.
FAQ
What is the maximum reverse voltage rating for SD101B-TR?
The SD101B-TR has a maximum reverse voltage (VR) rating of 50 V, verified per Vishay's datasheet Document Number 85629. This rating applies under standard test conditions (Tamb = 25 °C) and defines the peak DC or repetitive reverse voltage the device can block without breakdown. Exceeding 50 V risks irreversible avalanche conduction and permanent damage to the SD101B-TR.
Does SD101B-TR have a cathode marking, and how is it identified?
Yes, the SD101B-TR features a black cathode band on the glass body of its DO-35 package, consistent with JEDEC DO-204AH standards. The band marks the cathode terminal, which must be held at a lower potential than the anode during forward conduction. This marking is visible under standard visual inspection and aligns with the pinout defined in the SD101B-TR datasheet.
What is the typical forward voltage drop of SD101B-TR at 15 mA?
The typical forward voltage drop of SD101B-TR is 950 mV at 15 mA forward current and 25 °C ambient temperature, as specified in the Electrical Characteristics table of Vishay's SD101B-TR datasheet. This value reflects real-world conduction loss in moderate-current applications such as DC/DC converter feedback paths or low-power rectifiers.
Is SD101B-TR suitable for high-frequency detector applications?
Yes, SD101B-TR is specifically suited for high-frequency detector applications due to its 2.1 pF junction capacitance at 0 V and 1 MHz, low 400 mV forward voltage, and fast switching behavior inherent to Schottky construction. These parameters enable clean RF envelope detection up to 200 MHz, as confirmed in the Typical Characteristics section (Fig. 3) of the SD101B-TR datasheet.
What packaging options are available for SD101B-TR?
The SD101B-TR is supplied in tape-and-reel format: 10,000 units per 13-inch reel (52 mm tape width), with 50,000 units per box. An alternative ammopack option (SD101B-TAP) is also available with identical quantity and tape specifications. Both formats comply with EIA-481-D standards and support automated SMT placement via standard pick-and-place feeders.
SD101B-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 30mA
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 15 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 200 nA @ 50 V
- Capacitance @ Vr, F:
- 2pF @ 0V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
- Operating Temperature - Junction:
- -65°C ~ 150°C
SD101B-TR FAQ
1.How can I place an order for SD101B-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SD101B-TR 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 SD101B-TR reliable?
The price and inventory of SD101B-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SD101B-TR is usually 5 days.
3.What payment methods are accepted for SD101B-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD101B-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD101B-TR?
SD101B-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD101B-TR 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 SD101B-TR?
For technical support, including SD101B-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD101B-TR requirements.
6.How does Aetrix verify that SD101B-TR is sourced from the original manufacturer or authorized distributors?
All SD101B-TR 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 SD101B-TR meets industry standards.
7.What is the process for return or replacement of SD101B-TR?
All SD101B-TR units undergo pre-shipment inspection (PSI). If there is an issue with SD101B-TR, 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 SD101B-TR part is unused and in its original packaging.
Return procedure for SD101B-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SD101B-TR Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
