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Taiwan Semiconductor Corporation SS1H4LS RVG
- Part No.:
- SS1H4LS RVG
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123H
- Datasheet:
-
SS1H4LS RVG.pdf
- Description:
- DIODE SCHOTTKY 40V 1A SOD123HE
- Quantity:
- Payment:
- Shipping:
Inventory:1,903
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Product details
Overview
SS1H4LS from Taiwan Semiconductor is a 1A, 40V Schottky barrier surface-mount rectifier in SOD-123HE package, featuring ultra-low forward voltage (≤0.65 V at 1 A, 25°C), low leakage current (≤1.0 µA at 25°C), and high surge capability (30 A IFSM). It serves as a primary output rectifier in compact AC/DC adapters and DC/DC converters where efficiency and thermal performance are critical.
For engineers reviewing the SS1H4LS datasheet, SS1H4LS pinout, SS1H4LS application, or SS1H4LS equivalent, key selection criteria include its 40 V VRRM rating, 1 A continuous forward current, SOD-123HE footprint compatibility, and junction-to-lead thermal resistance of 20 °C/W for board-level thermal management.
Technical Context
This Schottky rectifier uses a single-die construction optimized for low VF and minimal reverse recovery loss. Its 40 V repetitive peak reverse voltage and 28 V RMS rating support use in secondary-side rectification of low-voltage, high-frequency switching supplies.
Thermal design is enabled by a junction-to-lead resistance of 20 °C/W and a junction-to-ambient resistance of 72 °C/W, with operation validated from –55°C to +150°C. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum reverse blocking voltage before breakdown; defines safe operating range in 5–12 V output rails |
| IF | 1 A - Continuous forward current rating; supports typical adapter outputs up to 12 W at >85% efficiency |
| VF @ 1 A, 25°C | ≤0.65 V - Low conduction loss reduces heat generation and improves power density |
| IR @ 40 V, 25°C | ≤1.0 µA - Ultra-low leakage preserves standby power budget in energy-efficient designs |
| IFSM | 30 A - Withstands short-duration inrush and transient surges without failure |
| RθJL | 20 °C/W - Enables direct thermal coupling to PCB copper for effective heat extraction |
| TJ max | +150 °C - Allows reliable operation in enclosed, thermally constrained environments |
Pinout & Package
SS1H4LS is housed in the SOD-123HE surface-mount package: compact (2.7 × 1.6 × 0.85 mm), matte tin-plated leads, cathode indicated by band, UL 94V-0 molding compound, and JEDEC-compliant lead finish.
| 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) |
| Cathode | Forward current exit / reverse blocking terminal | Connected to output rail; polarity band identifies this terminal on PCB silkscreen |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low VF (≤0.65 V) | Reduces conduction loss by >30% vs. comparable 40 V Si diodes, directly improving converter efficiency |
| SOD-123HE footprint | Enables automated placement and fits high-density layouts with <0.85 mm profile constraint |
| J-STD-020 Level 1 MSL | Eliminates bake requirements prior to reflow, reducing manufacturing cost and cycle time |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and global environmental directives for consumer and industrial shipments |
| Single-die configuration | Ensures consistent electrical characteristics and eliminates mismatch risk in parallel configurations |
Applications
| AC/DC Adapters | DC/DC Converters |
|---|---|
Use Scenario: 5–12 V, 1 A output USB-C or legacy wall adapters with high-frequency flyback topology. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier replacement; conducts during positive half-cycle of transformer secondary. Use Value: Low VF minimizes power loss at light-to-moderate loads, extending no-load efficiency compliance (e.g., DOE VI, CoC Tier 2). | Use Scenario: Point-of-load (POL) buck converter in industrial control modules requiring compact, efficient 3.3 V or 5 V supply. IC Role / Device Role / Timing Role: Output freewheeling diode; clamps inductor current during high-side switch off-time. Use Value: Fast switching and negligible reverse recovery enable stable regulation at >500 kHz switching frequencies without snubbers. |
| LED Drivers | Automotive Infotainment Power Rails |
Use Scenario: Constant-current LED driver for interior lighting with 12 V input and 3–4 V string drop. IC Role / Device Role / Timing Role: Output rectifier in isolated flyback or non-isolated buck-boost stage. Use Value: Low IR ensures minimal dark-current leakage, preventing unintended LED glow in standby mode. | Use Scenario: 5 V auxiliary rail in head unit or display module powered from vehicle battery (9–16 V). IC Role / Device Role / Timing Role: Input protection and reverse-polarity clamp diode in front-end power conditioning. Use Value: 30 A IFSM withstands load-dump transients; –55°C to +150°C rating supports under-hood ambient extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor SB140 | Same SOD-123 package, 40 V VRRM, but VF = 0.55 V (typ) at 1 A; IR = 500 µA (max) at 25°C - higher leakage | Higher leakage may impact standby power in energy-sensitive designs | Prefer SS1H4LS where <1 µA IR is required; SB140 acceptable if VF priority outweighs leakage |
| Vishay VS-1EQH04HM3 | SOD-123HE package, 40 V, VF = 0.54 V (typ), IR = 100 µA (max); RθJA = 75 °C/W - slightly worse thermal dissipation | Marginally higher thermal resistance limits sustained 1 A operation in confined spaces | SS1H4LS preferred for thermally constrained PCBs; VS-1EQH04HM3 suitable for moderate airflow environments |
Compared with SB140 and VS-1EQH04HM3, SS1H4LS delivers the lowest specified reverse leakage (≤1.0 µA) and best thermal coupling (RθJL = 20 °C/W), making it optimal for space-constrained, low-standby-power adapter and POL applications.
Availability
SS1H4LS is available at Aetrix Electronics and suitable for AC/DC adapters, DC/DC converters, and LED drivers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for SS1H4LS 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, serving global power management and signal integrity markets since 1979.
The SS1H4LS belongs to TSC's LS-series Schottky rectifier family, engineered specifically for high-efficiency, low-profile secondary-side rectification in consumer and industrial switching power supplies.
FAQ
What is the maximum junction temperature rating for SS1H4LS?
The SS1H4LS has a maximum junction temperature (TJ max) of +150°C, verified per absolute maximum ratings in the official datasheet. This allows continuous operation in thermally demanding environments such as enclosed power adapters or automotive infotainment modules. Derating curves confirm usable current capacity down to 0.5 A at 125°C ambient with standard PCB copper area.
Does SS1H4LS have a defined pinout or polarity marking?
Yes - SS1H4LS uses a two-terminal SOD-123HE package with unambiguous polarity: the cathode is marked by a visible band on the device body. The anode is the unmarked end. This matches JEDEC-standard orientation and ensures correct placement during automated assembly and manual inspection.
Is SS1H4LS compliant with RoHS and halogen-free standards?
Yes - SS1H4LS is RoHS compliant and halogen-free per IEC 61249-2-21, as confirmed in the "Features" section of the official Taiwan Semiconductor datasheet (Version C2208). No brominated flame retardants or chlorine-based compounds are used in the molding compound or plating.
What is the forward voltage specification for SS1H4LS at 1 A and 125°C?
The datasheet specifies forward voltage only at 25°C (≤0.65 V at 1 A). While VF decreases with rising temperature in Schottky diodes, no typ/max value is published for 125°C. Designers should apply derating based on typical VF vs. TJ curves in Figure 4 of the SS1H4LS–SS1H20LS datasheet, where VF drops ~1.5 mV/°C above 25°C.
Can SS1H4LS replace a standard silicon rectifier like 1N4004 in a linear power supply?
No - SS1H4LS is not recommended for linear power supplies due to its 40 V VRRM rating and lack of surge robustness beyond 30 A (8.3 ms). The 1N4004 offers 400 V blocking and higher surge tolerance. SS1H4LS is optimized for high-frequency switching topologies (e.g., flyback, buck) where low VF and fast recovery matter - not 50/60 Hz line-frequency rectification.
SS1H4LS RVG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123H
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 650 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 µA @ 40 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123HE
- Operating Temperature - Junction:
- -55°C ~ 150°C
SS1H4LS RVG FAQ
1.How can I place an order for SS1H4LS RVG through Aetrix?
Please submit a Request for Quotation (RFQ) for SS1H4LS RVG 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 SS1H4LS RVG reliable?
The price and inventory of SS1H4LS RVG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS1H4LS RVG is usually 5 days.
3.What payment methods are accepted for SS1H4LS RVG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS1H4LS RVG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS1H4LS RVG?
SS1H4LS RVG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS1H4LS RVG 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 SS1H4LS RVG?
For technical support, including SS1H4LS RVG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS1H4LS RVG requirements.
6.How does Aetrix verify that SS1H4LS RVG is sourced from the original manufacturer or authorized distributors?
All SS1H4LS RVG 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 SS1H4LS RVG meets industry standards.
7.What is the process for return or replacement of SS1H4LS RVG?
All SS1H4LS RVG units undergo pre-shipment inspection (PSI). If there is an issue with SS1H4LS RVG, 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 SS1H4LS RVG part is unused and in its original packaging.
Return procedure for SS1H4LS RVG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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