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Taiwan Semiconductor Corporation LSR102 L0G
- Part No.:
- LSR102 L0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-213AB, MELF
- Datasheet:
-
LSR102 L0G.pdf
- Description:
- DIODE SCHOTTKY 20V 1A MELF
- Quantity:
- Payment:
- Shipping:
Inventory:9,645
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Product details
Overview
LSR102 L0G from Taiwan Semiconductor is a 1 A, 20 V repetitive peak reverse voltage Schottky surface-mount rectifier in MELF package, with 25 A surge rating, 0.55 V max forward voltage at 1.0 A, and 1 mA max reverse leakage at 25°C - used in DC-DC converter output stages for high-efficiency low-voltage power conversion.
For engineers reviewing the LSR102 L0G datasheet, LSR102 L0G pinout, LSR102 L0G application, or LSR102 L0G equivalent, key selection criteria include its MELF package thermal resistance (80°C/W), junction temperature range (–65°C to +150°C), RoHS/halogen-free compliance, and suitability for automated SMT placement in compact power adapters and inverters.
Technical Context
The LSR102 L0G is a planar Schottky barrier diode optimized for low forward voltage drop and fast switching in low-voltage, medium-current rectification. Its MELF construction provides superior thermal dissipation over standard SOD-123 packages while maintaining compatibility with high-speed pick-and-place equipment.
It operates across –65°C to +150°C junction temperature, supports 25 A non-repetitive surge current (8.3 ms half-sine), and exhibits 110 pF typical junction capacitance at 1 MHz and 4.0 V reverse bias - enabling stable performance in 100–500 kHz switching converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Forward Current (IF) | 1 A continuous - supports sustained output rectification in 5–12 V, ~10 W DC-DC modules |
| Repetitive Peak Reverse Voltage (VRRM) | 20 V - rated for use in ≤12 V nominal input/output systems with margin against transients |
| Max Forward Voltage (VF) | 0.55 V @ 1.0 A - reduces conduction loss by ~30% vs. comparable PN diodes, improving efficiency |
| Surge Current (IFSM) | 25 A (8.3 ms) - withstands inrush and fault currents in adapter primary-side snubbers or output stage recovery |
| Junction-to-Ambient RθJA | 80 °C/W - enables 1 A operation without heatsink in free-air, PCB-mounted MELF layout |
| Reverse Leakage (IR) | 1 mA @ 20 V, 25°C - low leakage preserves standby efficiency in always-on power supplies |
| Junction Capacitance (CJ) | 110 pF @ 1 MHz, 4 V - limits high-frequency noise coupling in EMI-sensitive SMPS feedback paths |
Pinout & Package
MELF (Metal Electrode Leadless Face) cylindrical package with axial cathode band marking; 4.8–5.5 mm length, 2.25–2.67 mm diameter, 120 mg weight; UL 94V-0 rated molding compound; JESD 201 Class 1A whisker compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (end cap) | Current entry point under forward bias | Connected to lower-potential node (e.g., switch node or ground return); requires symmetric pad layout per datasheet |
| Cathode (banded end) | Current exit point under forward bias | Connected to higher-potential rail (e.g., output capacitor positive); polarity critical for rectification direction |
Key Features
| Feature | Design Value |
|---|---|
| RoHS & halogen-free compliance | Meets IEC 61249-2-21 and EU RoHS - required for CE-marked consumer and industrial power adapters |
| Automated placement compatibility | MELF geometry and 120 mg mass optimized for high-yield, high-speed SMT feeders and vacuum nozzles |
| 150°C max junction temperature | Enables operation in sealed enclosures or high-ambient environments (e.g., LED drivers in enclosed fixtures) |
| UL 94V-0 flammability rating | Reduces fire risk in mains-connected power supplies meeting IEC 62368-1 safety requirements |
| JESD 201 Class 1A whisker resistance | Prevents tin whisker growth in long-life industrial applications (>10 years field life) |
Applications
| AC-DC Adapters | DC-DC Converters |
|---|---|
Use Scenario: Secondary-side rectification in 5–12 V, 5–12 W wall adapters for IoT sensors and USB-C PD accessories. IC Role / Device Role / Timing Role: Output synchronous rectifier replacement - conducts during low-side switch conduction phase to minimize VF loss. Use Value: 0.55 V VF reduces conduction loss by ≥0.5 W vs. 1N5819, improving adapter efficiency from 82% to 84.5% at full load. | Use Scenario: Buck converter freewheeling path in 3.3 V/1 A point-of-load regulators for FPGA I/O banks. IC Role / Device Role / Timing Role: Uncontrolled freewheeling diode - provides current continuity when high-side MOSFET is off. Use Value: 110 pF CJ minimizes ringing during turn-off, reducing EMI filter component count by one 10 nF capacitor. |
| Inverters | LED Drivers |
Use Scenario: DC bus clamping and flyback protection in 24 V input solar microinverters. IC Role / Device Role / Timing Role: Transient voltage clamp - absorbs inductive kickback from H-bridge gate drivers during dead-time transitions. Use Value: 25 A IFSM rating handles 20 A surge spikes without degradation, extending inverter MTBF beyond 100,000 cycles. | Use Scenario: Constant-current regulation path in isolated buck-boost LED drivers for streetlight modules. IC Role / Device Role / Timing Role: Output rectifier in secondary synchronous rectification circuit - delivers stable 350 mA to LED string. Use Value: –65°C to +150°C TJ range ensures reliable startup at –40°C ambient and operation at 85°C case temperature in outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-1N5817-M3/54 | Same 1 A / 20 V rating, but DO-41 through-hole package; RθJA ≈ 120°C/W; VF = 0.475 V typ | Requires wave soldering or manual assembly; unsuitable for high-density SMT layouts | Select only if legacy through-hole design or thermal derating allows higher ambient rise |
| ON Semiconductor SB120-E3/54 | SOD-123 package; same 1 A / 20 V; VF = 0.5 V max; RθJA = 110°C/W; IR = 0.5 mA max @ 25°C | Lower leakage improves light-load efficiency but reduced surge rating (15 A vs. 25 A) | Prefer for ultra-low standby power; avoid in surge-prone motor drive auxiliary supplies |
Compared with VS-1N5817-M3/54 and SB120-E3/54, the LSR102 L0G uniquely combines MELF's superior thermal performance (80°C/W), 25 A surge capability, and automated placement readiness - making it optimal for space-constrained, high-reliability SMT power supplies where thermal headroom and production yield are critical.
Availability
LSR102 L0G is available at Aetrix Electronics and suitable for AC-DC adapters, DC-DC converters, and LED drivers requiring stable component supply, RoHS-compliant sourcing, and consistent MELF package form factor across production batches.
Supply support for LSR102 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 Taiwanese manufacturer specializing in discrete semiconductors, including rectifiers, TVS diodes, and MOSFETs, with ISO 9001 and IATF 16949 certification.
The LSR102 L0G belongs to TSC's LSR10x Schottky rectifier family, engineered for cost-sensitive, high-volume power conversion applications demanding robust surge handling and automated manufacturing compatibility.
FAQ
What is the maximum junction temperature rating for the LSR102 L0G?
The LSR102 L0G has a maximum junction temperature (TJ) rating of +150°C, with an operating range from –65°C to +150°C. This allows reliable operation in sealed enclosures or high-ambient environments such as LED driver housings or industrial control cabinets. The 150°C limit is validated per absolute maximum ratings in the H2004 datasheet and supported by its MELF package's thermal performance (RθJA = 80°C/W).
Is the LSR102 L0G RoHS and halogen-free compliant?
Yes, the LSR102 L0G is fully RoHS compliant and halogen-free per IEC 61249-2-21. This is confirmed in the "Features" section of the H2004 datasheet and verified via TSC's material declarations. Compliance applies to all homogeneous materials in the MELF package, including molding compound and metallization, supporting CE marking and export to regulated markets.
What does the "L0G" suffix indicate in LSR102 L0G?
The "L0G" suffix in LSR102 L0G denotes tape-and-reel packaging: MELF device supplied in 5,000-unit reels on 13-inch diameter carriers. This format is optimized for high-speed SMT placement equipment. The "L0" indicates standard reel configuration, and "G" confirms RoHS-compliant plating - consistent across TSC's LSR10x ordering codes per the "Ordering Information" table.
How does the LSR102 L0G compare to the LSR103 L0G in terms of voltage rating?
The LSR102 L0G is rated for 20 V repetitive peak reverse voltage (VRRM), while the LSR103 L0G is rated for 30 V. Both share identical forward current (1 A), surge rating (25 A), thermal resistance (80°C/W), and MELF package. The voltage difference is the sole functional distinction - LSR102 L0G is selected where 20 V margin suffices (e.g., 12 V output rails), reducing cost and VF slightly versus higher-voltage variants.
Can the LSR102 L0G be used in place of a 1N5817 in an existing design?
The LSR102 L0G is not a direct drop-in replacement for the 1N5817 due to differing packages: 1N5817 uses DO-41 (through-hole), while LSR102 L0G uses MELF (SMT). Electrical specs align closely (both 1 A / 20 V Schottky), but PCB layout, thermal design, and assembly process must be revised. Use LSR102 L0G only in new SMT designs targeting improved thermal performance and automated manufacturing.
LSR102 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):
- 20 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 @ 20 V
- Capacitance @ Vr, F:
- 110pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- MELF
- Operating Temperature - Junction:
- -65°C ~ 125°C
LSR102 L0G FAQ
1.How can I place an order for LSR102 L0G through Aetrix?
Please submit a Request for Quotation (RFQ) for LSR102 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 LSR102 L0G reliable?
The price and inventory of LSR102 L0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LSR102 L0G is usually 5 days.
3.What payment methods are accepted for LSR102 L0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LSR102 L0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LSR102 L0G?
LSR102 L0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LSR102 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 LSR102 L0G?
For technical support, including LSR102 L0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LSR102 L0G requirements.
6.How does Aetrix verify that LSR102 L0G is sourced from the original manufacturer or authorized distributors?
All LSR102 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 LSR102 L0G meets industry standards.
7.What is the process for return or replacement of LSR102 L0G?
All LSR102 L0G units undergo pre-shipment inspection (PSI). If there is an issue with LSR102 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 LSR102 L0G part is unused and in its original packaging.
Return procedure for LSR102 L0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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