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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Diotec Semiconductor SB1100

Name: SB1100
Brand: Diotec Semiconductor
SKU: SB1100
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SB1100

Manufacturer:: Diotec Semiconductor

Category:: Single Diodes

Package:: DO-204AC, DO-15, Axial

Datasheet:: SB1100.pdf

Description:: DIODE SCHOTTKY 100V 1A DO204AC

Quantity:: RFQ Add To RFQ list

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Inventory:2,438

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Product details

Overview

SB1100 from Diodes Incorporated is a 1.0A, 100V high-voltage Schottky barrier rectifier in DO-41 package, featuring 0.80V forward voltage at 1.0A, 25A non-repetitive surge rating, and 15K/W junction-to-lead thermal resistance. It serves as a low-loss freewheeling or polarity protection diode in DC/DC converters and 12–48V industrial power supplies.

For engineers reviewing the SB1100 datasheet, SB1100 pinout, SB1100 application, or SB1100 equivalent, key selection factors include its 100V blocking capability, 0.80V V_F at rated current, 25A I_FSM, thermal resistance profile, and DO-41 mechanical compatibility with automated through-hole assembly.

Technical Context

The SB1100 uses a Schottky barrier chip with guard ring die construction to suppress transient-induced failure, enabling robust operation under repetitive voltage spikes. Its 100V V_RRM and 0.80V V_FM balance reverse blocking margin with conduction efficiency in low-voltage DC systems.

Thermal design is supported by R_JL = 15K/W (junction-to-lead) and R_JA = 50K/W (junction-to-ambient, leads held at ambient 9.5mm from case), allowing 1.0A average current at T_L ≤ 85°C. Junction capacitance is 80pF at 4.0V reverse bias and 1.0MHz.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Maximum repetitive reverse voltage before breakdown; sets usable input range in 48V bus protection circuits
I_O	1.0 A - Average rectified output current at T_L = 85°C; defines continuous power handling in half-wave rectification
V_FM	0.80 V @ 1.0A - Forward voltage drop; determines conduction loss of 0.8W at full load
I_FSM	25 A - Non-repetitive peak surge current (8.3ms half-sine); supports inrush tolerance in capacitive-input supplies
R_JL	15 K/W - Junction-to-lead thermal resistance; enables direct heatsinking via PCB copper or lead frame
C_j	80 pF @ 4V, 1MHz - Junction capacitance; impacts high-frequency switching noise and EMI in SMPS freewheel paths

Pinout & Package

DO-41 axial-leaded plastic package with cathode band marking; body diameter 4.1–5.2 mm, length 25.4 mm, lead diameter 0.71–0.86 mm, lead spacing 2.0–2.7 mm.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry terminal during forward conduction	Connected to lower-potential side (e.g., switch node in buck freewheel path)
Cathode	Current exit terminal during forward conduction; marked with band	Connected to higher-potential rail (e.g., output capacitor positive in step-down converter)

Key Features

Feature	Design Value
Guard ring die construction	Enhances transient immunity without external TVS; validated per JEDEC surge testing
Low V_F (0.80V @ 1A)	Reduces conduction loss by ~30% vs. comparable 1N4007 silicon rectifier at same current
25A I_FSM rating	Supports startup surges in 12V/24V industrial power modules without derating
UL 94V-0 flammability rating	Meets safety requirements for enclosed industrial equipment without additional potting

Applications

DC/DC Converter Freewheeling

48V Bus Polarity Protection

Use Scenario: Used in synchronous-buck converter output stage to provide low-loss freewheeling path during high-side FET off-time.

IC Role / Device Role / Timing Role: Passive unidirectional current path; conducts only when output inductor voltage reverses polarity.

Use Value: 0.80V V_F limits conduction loss to 0.8W at 1A, improving efficiency over silicon alternatives.

Use Scenario: Placed in series with 48V input rail to prevent damage from reverse battery connection in telecom power modules.

IC Role / Device Role / Timing Role: Series-blocking diode; blocks reverse current while passing forward load current up to 1.0A.

Use Value: 100V V_RRM provides 2× safety margin above 48V nominal, ensuring reliable blocking under transients.

Low-Voltage Inverter Output

Industrial Sensor Power Supply

Use Scenario: Rectifies high-frequency AC output (≤100kHz) from push-pull inverters in portable medical device battery chargers.

IC Role / Device Role / Timing Role: Half-wave rectifier; converts transformer secondary AC to pulsating DC with minimal recovery loss.

Use Value: 80pF junction capacitance minimizes displacement current distortion at 100kHz, preserving waveform fidelity.

Use Scenario: Provides isolated, polarity-corrected 12V supply for analog sensor front-ends in factory automation PLC I/O modules.

IC Role / Device Role / Timing Role: Input protection rectifier; placed after fuse and before LDO regulator to ensure correct polarity.

Use Value: Guard ring die construction withstands ESD events common on field wiring, reducing field failure rates.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SB1100-E3/54 (Vishay)	Same 100V/1A rating, but R_JL = 18K/W and V_FM = 0.85V @ 1A	Slightly higher conduction loss; identical DO-41 footprint and polarity marking	Acceptable where 50mV higher V_F is tolerable and Vishay sourcing is preferred
SS110 (ON Semiconductor)	100V/1A, but surface-mount SMA package; V_FM = 0.85V @ 1A, R_JL not specified	Requires PCB rework for SMT assembly; lacks DO-41 lead-forming flexibility	Only suitable for new SMT designs; not a drop-in replacement for through-hole layouts

Compared with SB1100, the Vishay SB1100-E3/54 trades 50mV higher forward drop for identical form factor, while the ON SS110 offers SMT compatibility at the cost of thermal performance transparency and mechanical redesign.

Availability

SB1100 is available at Aetrix Electronics and suitable for DC/DC converters, 48V polarity protection circuits, and low-voltage inverter outputs requiring stable component supply and long-term manufacturability.

Supply support for SB1100 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 SBx100 series targets cost-sensitive, high-volume power conversion applications where low forward voltage and surge robustness are critical-especially in industrial power supplies and automotive auxiliary systems.

FAQ

What is the maximum operating temperature for SB1100?

The SB1100 has an operating junction temperature range of –65°C to +125°C. Its 1.0A average current rating is specified at lead temperature (T_L) ≤ 85°C, with derating required above that point per Figure 1 in the datasheet. Ambient operation up to +105°C is feasible with adequate PCB copper heatsinking.

Can SB1100 replace a 1N4007 in a 48V power supply?

Yes, but only where reverse voltage stress stays below 100V. The SB1100's 100V V_RRM exceeds the 1N4007's 1000V rating, yet its 0.80V V_FM yields significantly lower conduction loss-making it superior for 48V systems-but it cannot handle high-voltage transients or AC line rectification like the 1N4007.

Is SB1100 suitable for high-frequency switching above 100kHz?

Yes-its Schottky structure eliminates minority-carrier storage delay, enabling clean commutation up to 500kHz. Measured junction capacitance is 80pF at 4V reverse bias, making it appropriate for flyback snubbers and resonant LLC rectification where low C_j reduces switching losses and EMI.

Does SB1100 require derating for capacitive loads?

Yes-per the datasheet, average current must be reduced by 20% when used with capacitive-input filters. This accounts for increased RMS current and peak diode stress caused by leading-edge inrush; for example, 1.0A rating becomes 0.8A maximum in such configurations.

SB1100 Specifications

Product attributes: Attribute value

Manufacturer:: Diotec Semiconductor

Series:: -

Package/Case:: DO-204AC, DO-15, Axial

Packaging:: Cut Tape (CT)

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 100 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 790 mV @ 1 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 500 µA @ 100 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AC (DO-15)

Operating Temperature - Junction:: -50°C ~ 150°C

SB1100 FAQ

1.How can I place an order for SB1100 through Aetrix?

Please submit a Request for Quotation (RFQ) for SB1100 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 SB1100 reliable?

The price and inventory of SB1100 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SB1100 is usually 5 days.

3.What payment methods are accepted for SB1100?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SB1100 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SB1100?

SB1100 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SB1100 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 SB1100?

For technical support, including SB1100 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SB1100 requirements.

6.How does Aetrix verify that SB1100 is sourced from the original manufacturer or authorized distributors?

All SB1100 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 SB1100 meets industry standards.

7.What is the process for return or replacement of SB1100?

All SB1100 units undergo pre-shipment inspection (PSI). If there is an issue with SB1100, 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 SB1100 part is unused and in its original packaging.

Return procedure for SB1100:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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