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Taiwan Semiconductor Corporation TSSE3H45
- Part No.:
- TSSE3H45
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123H
- Datasheet:
-
TSSE3H45.pdf
- Description:
- DIODE SCHOTTKY 45V 3A SOD123HE
- Quantity:
- Payment:
- Shipping:
Inventory:40,000
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Product details
Overview
TSSE3H45 from Taiwan Semiconductor is a 3A, 45V trench Schottky surface-mount rectifier in SOD-123HE package, featuring 0.57V max forward voltage at 3A/25°C, 60A peak surge rating, and 150°C maximum junction temperature. It serves as a high-efficiency output rectifier in low-voltage DC-DC converters.
For engineers reviewing the TSSE3H45 datasheet, TSSE3H45 pinout, TSSE3H45 application, or TSSE3H45 equivalent, key selection criteria include forward voltage at elevated temperature, thermal resistance (20°C/W), moisture sensitivity level (J-STD-020 Level 1), cathode-band polarity marking, and SOD-123HE mechanical compatibility with automated assembly.
Technical Context
This device uses a single-die trench Schottky architecture to achieve low VF and high temperature stability. Its 45V VRRM rating targets mid-range secondary-side rectification where higher voltage margin than 30V devices is required without sacrificing efficiency.
The SOD-123HE package provides enhanced thermal performance over standard SOD-123 via optimized leadframe design, enabling 3A continuous operation with RθJL = 20°C/W. Cathode band polarity and matte tin plating ensure reliable solderability and board-level identification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum repetitive reverse blocking voltage; defines safe operating range in flyback or buck output stages |
| IF | 3 A - Continuous forward current rating at TA = 25°C; derates linearly above 25°C per curve Fig.1 |
| VF (max) | 0.57 V @ 3A, 25°C - Directly reduces conduction loss in high-frequency SMPS designs |
| IFSM | 60 A - Peak non-repetitive surge current capability; supports inrush and transient overload handling |
| TJ max | +150 °C - Enables operation in thermally constrained environments such as enclosed adapters |
| RθJL | 20 °C/W - Junction-to-lead thermal resistance; enables direct PCB copper pour heat sinking without heatsink |
| MSL | Level 1 (J-STD-020) - No floor life limitation; suitable for standard SMT reflow without dry pack |
Pinout & Package
SOD-123HE is a surface-mount plastic package with two terminals: anode and cathode, marked by a visible cathode band on the body. Lead finish is matte tin, compliant with J-STD-002 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for forward conduction | Connected to lower-potential node (e.g., transformer secondary center-tap or switch node) |
| Cathode | Output terminal for forward conduction | Marked by band; connects to output rail and filter capacitor positive terminal |
Key Features
| Feature | Design Value |
|---|---|
| Trench Schottky structure | Enables 0.42V typical VF at 3A/125°C - critical for maintaining efficiency in hot-running DC-DC modules |
| Junction-to-lead thermal resistance | 20°C/W - allows 3A operation with minimal PCB copper area, reducing layout complexity |
| Moisture Sensitivity Level 1 | No bake requirement before SMT placement - lowers manufacturing cost and avoids moisture-induced popcorning |
| Halogen-free & RoHS-compliant | Meets IPC-1752A material declaration requirements for industrial and consumer end-equipment |
| Cathode band polarity marking | Ensures unambiguous orientation during automated optical inspection (AOI) and manual rework |
Applications
| Server VRM Output Rectification | Laptop Adapter Secondary Side |
|---|---|
Use Scenario: 12V output stage of multiphase buck converter supplying CPU core voltage. IC Role / Device Role / Timing Role: Output synchronous rectifier replacement; conducts during low-side FET on-time. Use Value: 0.57V max VF minimizes conduction loss at 3A, improving full-load efficiency by ~0.8% vs. legacy Schottkys. | Use Scenario: 19V/3.42A output rectification in compact wall-mounted AC-DC adapter. IC Role / Device Role / Timing Role: Primary output rectifier in quasi-resonant flyback topology. Use Value: SOD-123HE footprint fits tight spacing; MSL Level 1 eliminates pre-bake step in high-volume SMT line. |
| Industrial DC-DC Module | USB PD Fast Charger |
Use Scenario: 5V/3A isolated DC-DC module for PLC I/O power rails. IC Role / Device Role / Timing Role: Secondary-side freewheeling diode in forward converter. Use Value: 150°C TJ rating supports operation inside sealed enclosures with ambient up to 85°C. | Use Scenario: 20V PPS output rectification in 65W GaN-based USB PD charger. IC Role / Device Role / Timing Role: High-frequency output rectifier synchronized with GaN switch. Use Value: Low VF and fast recovery (<10ns) reduce switching losses and EMI generation at 200–500kHz. |
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-3EYH04-M3/54 | 45V VRRM, 3A IF, VF = 0.52V max @ 3A/25°C; SOD-123 package (not HE variant) | Slightly higher RθJL (~25°C/W); no MSL Level 1 guarantee | Acceptable where thermal margin exists and JEDEC moisture handling is controlled |
| ON Semiconductor SB340-T | 40V VRRM, 3A IF, VF = 0.52V max @ 3A/25°C; DO-214AA package | Larger footprint; 175°C TJ rating but higher VF at 125°C | Preferred only when higher voltage margin is unnecessary and board space permits larger package |
Compared with VS-3EYH04-M3/54 and SB340-T, the TSSE3H45 delivers superior thermal performance (20°C/W vs. ≥25°C/W) and guaranteed MSL Level 1 handling, making it optimal for compact, high-volume, thermally constrained SMT designs requiring zero floor-life management.
Availability
TSSE3H45 is available at Aetrix Electronics and suitable for switching mode power supplies, laptop adapters, and industrial DC-DC converters requiring stable component supply, consistent parametric performance, and J-STD-020 Level 1 manufacturability.
Supply support for TSSE3H45 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 diodes, and MOSFETs since 1979.
The TSSE3Hxx series was developed specifically for high-efficiency, surface-mount secondary-side rectification in compact AC-DC and isolated DC-DC converters targeting consumer, computing, and industrial markets.
FAQ
What is the maximum junction temperature rating for TSSE3H45?
The TSSE3H45 has a maximum junction temperature (TJ) rating of +150°C, verified per absolute maximum ratings table. This allows sustained 3A operation in ambient temperatures up to 85°C when mounted on 1-inch² 2-oz copper with thermal vias. The TSSE3H45 datasheet specifies derating curves confirming usable current down to 1.8A at 125°C ambient.
Does TSSE3H45 have a specified forward voltage at high temperature?
Yes, the TSSE3H45 specifies VF = 0.42V (typical) and 0.50V (max) at 3A and TJ = 125°C. This low high-temperature VF is enabled by its trench Schottky process and directly improves efficiency retention in thermally stressed applications like enclosed adapters where the TSSE3H45 operates near its thermal limit.
Is TSSE3H45 pin-compatible with other SOD-123HE rectifiers?
The TSSE3H45 uses the standard SOD-123HE footprint defined in JEDEC TO-277AB, with 1.6mm × 2.8mm body and 0.95mm lead pitch. It shares identical pad layout and polarity marking (cathode band) with all SOD-123HE rectifiers, including VS-3EYH04-M3/54 and Diodes Inc. AP3401W, enabling drop-in replacement where voltage/current ratings align.
What does the marking code "E3H45" indicate on TSSE3H45?
The top-side marking "E3H45" on the TSSE3H45 identifies the specific device variant: "E3" denotes the TSSE3 family, "H" indicates Schottky construction, and "45" specifies the 45V VRRM rating. This matches the ordering code TSSE3H45 and distinguishes it from TSSE3H60 (marked E3H60), ensuring correct identification during incoming inspection and assembly.
How does TSSE3H45's thermal resistance compare to standard SOD-123 devices?
The TSSE3H45 achieves RθJL = 20°C/W, which is 20–25% lower than typical SOD-123 Schottkys (25–28°C/W). This improvement results from the SOD-123HE's thicker leadframe and optimized internal bond wire geometry, allowing the TSSE3H45 to dissipate 0.6W at 25°C ambient without exceeding 150°C junction temperature - critical for fanless designs.
TSSE3H45 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):
- 45 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 570 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 45 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123HE
- Operating Temperature - Junction:
- -55°C ~ 150°C
TSSE3H45 FAQ
1.How can I place an order for TSSE3H45 through Aetrix?
Please submit a Request for Quotation (RFQ) for TSSE3H45 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 TSSE3H45 reliable?
The price and inventory of TSSE3H45 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSSE3H45 is usually 5 days.
3.What payment methods are accepted for TSSE3H45?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSSE3H45 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSSE3H45?
TSSE3H45 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSSE3H45 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 TSSE3H45?
For technical support, including TSSE3H45 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSSE3H45 requirements.
6.How does Aetrix verify that TSSE3H45 is sourced from the original manufacturer or authorized distributors?
All TSSE3H45 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 TSSE3H45 meets industry standards.
7.What is the process for return or replacement of TSSE3H45?
All TSSE3H45 units undergo pre-shipment inspection (PSI). If there is an issue with TSSE3H45, 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 TSSE3H45 part is unused and in its original packaging.
Return procedure for TSSE3H45:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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