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Taiwan Semiconductor Corporation LSR103 L0G
- Part No.:
- LSR103 L0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-213AB, MELF
- Datasheet:
-
LSR103 L0G.pdf
- Description:
- DIODE SCHOTTKY 30V 1A MELF
- Quantity:
- Payment:
- Shipping:
Inventory:4,286
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Product details
Overview
LSR103 L0G from Taiwan Semiconductor is a 1A, 30V repetitive peak reverse voltage Schottky surface-mount rectifier in MELF package, featuring 25A surge capability, 0.55V max forward voltage at 1A, and 150°C max junction temperature. It serves as a high-efficiency output rectifier in DC-DC converters for industrial power supplies.
For engineers reviewing the LSR103 L0G datasheet, LSR103 L0G pinout, LSR103 L0G application, or LSR103 L0G equivalent, key selection criteria include VRRM=30V, IF=1A, VF≤0.55V, IFSM=25A, and MELF package thermal performance (RθJA=80°C/W) in space-constrained, thermally demanding converter designs.
Technical Context
This Schottky rectifier operates with zero minority-carrier storage, enabling fast switching and low forward conduction loss. Its MELF package provides superior thermal dissipation over standard SOD-123 while maintaining compatibility with automated pick-and-place equipment.
The device exhibits 110pF typical junction capacitance at 1MHz/4V, supporting high-frequency operation up to several hundred kHz. Reverse leakage remains ≤1mA at 25°C and ≤10mA at 125°C under rated 30V blocking, ensuring stable performance across industrial temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - Maximum repetitive reverse voltage the device blocks without breakdown; defines usable input/output voltage range in buck or flyback secondary-side rectification. |
| IF | 1 A - Continuous average forward current rating; determines maximum sustained DC output current capability in power supply designs. |
| IFSM | 25 A - Non-repetitive surge current handling; enables robustness against line transients and startup inrush in AC-DC adapters. |
| VF @ 1A | ≤0.55 V - Forward voltage drop at rated current; directly impacts conduction loss (P = IF × VF) and thermal design in high-efficiency converters. |
| TJ max | +150 °C - Maximum junction operating temperature; allows reliable operation in enclosed, high-ambient environments like motor drives or LED drivers. |
| RθJA | 80 °C/W - Junction-to-ambient thermal resistance; used with power dissipation to calculate actual junction temperature rise above ambient. |
| CJ | 110 pF - Junction capacitance at 1 MHz / 4 V; influences high-frequency switching losses and EMI behavior in SMPS topologies. |
Pinout & Package
Package: MELF (Metal Electrode Leadless Face), cylindrical glass-passivated construction with cathode band marking polarity. Dimensions: A = 4.80–5.50 mm (length), B = 2.25–2.67 mm (diameter), C = 0.30–0.60 mm (lead diameter). Weight ≈ 120 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., transformer secondary center-tap or switch node in synchronous rectification); must withstand full forward surge current. |
| Cathode | Forward current exit point | Marked by visible band; connects to output rail or filter capacitor; carries full load current and defines output voltage reference in unregulated supplies. |
Key Features
| Feature | Design Value |
|---|---|
| RoHS & halogen-free compliance | Meets IEC 61249-2-21 and EU RoHS directives; eliminates hazardous substances for environmentally regulated industrial and consumer end-equipment. |
| MELF package reliability | Passes JESD201 Class 1A whisker test and UL 94V-0 flammability rating; ensures long-term mechanical integrity and safety in high-vibration or high-temp applications. |
| Automated placement compatibility | Standard MELF geometry and surface finish support high-yield, high-speed pick-and-place assembly without rework or tombstoning. |
| 125°C reverse leakage limit | IR ≤ 10 mA at TJ = 125°C and VR = 30 V; maintains stable blocking performance in thermally stressed converter outputs without excessive standby loss. |
Applications
| Industrial DC-DC Converters | AC-DC Adapters |
|---|---|
Use Scenario: Secondary-side rectification in isolated 24V/48V telecom or factory automation DC-DC modules operating at 200–500 kHz. IC Role / Device Role / Timing Role: Schottky rectifier replacing conventional PN diodes to reduce conduction loss and improve efficiency above 85%. Use Value: 0.55V VF at 1A lowers power loss by ~35% vs. silicon diodes, reducing heatsink requirements and improving thermal margin at 70°C ambient. | Use Scenario: Output rectification in compact wall-mounted 12V/1A laptop or IoT device adapters. IC Role / Device Role / Timing Role: Primary output rectifier in flyback topology with minimal PCB footprint and no forced airflow. Use Value: MELF package's 80°C/W RθJA enables natural convection cooling without derating below 1A, even at 50°C ambient. |
| Inverters for Motor Control | LED Driver Power Supplies |
Use Scenario: Freewheeling path in half-bridge inverter stages driving BLDC motors in HVAC or pump systems. IC Role / Device Role / Timing Role: Fast-recovery freewheeling diode clamping inductive kickback during PWM dead-time intervals. Use Value: Zero recovery time eliminates reverse recovery spikes, reducing EMI filtering burden and MOSFET stress in 20 kHz PWM inverters. | Use Scenario: Constant-current rectification stage in non-isolated buck-derived LED drivers for street lighting. IC Role / Device Role / Timing Role: Output rectifier handling continuous 1A LED string current with high ripple tolerance. Use Value: 150°C TJ max supports operation inside sealed, thermally insulated luminaires where internal temperatures exceed 100°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS13 (Diodes Inc.) | VRRM = 30 V, IF = 1 A, VF = 0.5 V typ @ 1 A, DO-214AC package, RθJA ≈ 100°C/W | Higher thermal resistance requires larger copper area or lower ambient; less suitable for sealed enclosures | Preferred where board space permits larger SMD footprint and cost sensitivity outweighs thermal constraints |
| SB130 (ON Semiconductor) | VRRM = 30 V, IF = 1 A, VF = 0.55 V max @ 1 A, DO-41 axial leaded package | Through-hole mounting only; incompatible with automated SMT lines; higher parasitic inductance limits high-frequency use | Applicable only in legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SS13 and SB130, the LSR103 L0G delivers identical voltage/current ratings but offers superior thermal performance (RθJA = 80°C/W) and SMT manufacturability in a compact MELF form factor-critical for high-density, thermally constrained converter layouts.
Availability
LSR103 L0G is available at Aetrix Electronics and suitable for industrial DC-DC converters, AC-DC adapters, and motor drive inverters requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for LSR103 L0G 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power rectifiers, TVS devices, and protection ICs since 1979.
The LSR102–LSR106 series was developed specifically for high-reliability, cost-sensitive surface-mount rectification in industrial and consumer power conversion, emphasizing thermal robustness, surge resilience, and automated assembly readiness.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) of the LSR103 L0G?
The LSR103 L0G has a VRRM of 30 V, meaning it reliably blocks up to 30 V of reverse voltage in repetitive operation. This rating is confirmed in the Absolute Maximum Ratings table on page 2 of the H2004 datasheet and defines its safe operating range in buck, flyback, or forward converter secondary windings.
Does the LSR103 L0G have a specified forward voltage drop at 1A?
Yes, the LSR103 L0G has a maximum forward voltage (VF) of 0.55 V at IF = 1.0 A and TA = 25°C, per the Electrical Specifications table. This value is measured under pulse conditions (PW = 0.3 ms) and represents worst-case conduction loss for thermal design calculations.
Is the LSR103 L0G RoHS and halogen-free compliant?
Yes, the LSR103 L0G meets RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21, as stated in the Features section of the H2004 datasheet. This compliance applies to all units shipped under ordering code LSR103 L0G with MELF packaging.
What is the junction-to-ambient thermal resistance (RθJA) of the LSR103 L0G?
The LSR103 L0G has a typical RθJA of 80°C/W, measured under standard JEDEC test conditions for surface-mount devices. This value assumes no additional copper pour or thermal vias and is used to estimate junction temperature rise above ambient during steady-state operation.
How is polarity indicated on the LSR103 L0G MELF package?
Polarity on the LSR103 L0G is indicated by a visible cathode band marked on the glass body of the MELF package. The banded end is the cathode terminal, and the opposite end is the anode-consistent with industry-standard MELF diode marking conventions.
LSR103 L0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-213AB, MELF
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 mA @ 30 V
- Capacitance @ Vr, F:
- 110pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- MELF
- Operating Temperature - Junction:
- -65°C ~ 125°C
LSR103 L0G FAQ
1.How can I place an order for LSR103 L0G through Aetrix?
Please submit a Request for Quotation (RFQ) for LSR103 L0G 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 LSR103 L0G reliable?
The price and inventory of LSR103 L0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LSR103 L0G is usually 5 days.
3.What payment methods are accepted for LSR103 L0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LSR103 L0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LSR103 L0G?
LSR103 L0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LSR103 L0G 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 LSR103 L0G?
For technical support, including LSR103 L0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LSR103 L0G requirements.
6.How does Aetrix verify that LSR103 L0G is sourced from the original manufacturer or authorized distributors?
All LSR103 L0G 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 LSR103 L0G meets industry standards.
7.What is the process for return or replacement of LSR103 L0G?
All LSR103 L0G units undergo pre-shipment inspection (PSI). If there is an issue with LSR103 L0G, 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 LSR103 L0G part is unused and in its original packaging.
Return procedure for LSR103 L0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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