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Taiwan Semiconductor Corporation SS56FSH
- Part No.:
- SS56FSH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-128
- Datasheet:
-
SS56FSH.pdf
- Description:
- 5A, 60V, SCHOTTKY RECTIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:3,677
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Product details
Overview
SS56FSH from Taiwan Semiconductor is a 5A, 60V Schottky barrier surface-mount rectifier in SOD-128 package, qualified to AEC-Q101, with forward voltage of 0.59 V at 5.0A/25°C and reverse current ≤200 µA at 25°C. It delivers high surge capability (110 A IFSM), low thermal resistance (RθJL = 13 °C/W), and is used in automotive-grade DC/DC converters and SMPS.
For engineers reviewing the SS56FSH datasheet, SS56FSH pinout, SS56FSH application, or SS56FSH equivalent, key selection factors include its 60V VRRM, 125°C-rated forward voltage drop, moisture sensitivity level 1 compliance, JESD201 Class 2 whisker resistance, and SOD-128 mechanical footprint compatibility with automated placement.
Technical Context
The SS56FSH is a single-die Schottky rectifier optimized for high-frequency switching applications where low conduction loss and fast recovery are critical. Its 60V peak reverse voltage rating and 5A average forward current support mid-voltage power conversion stages in compact layouts.
Thermal performance is defined by RθJL = 13 °C/W and RθJA = 63 °C/W on a 5 mm × 5 mm Cu pad PCB, enabling reliable operation up to 150°C junction temperature. Reverse leakage remains ≤200 µA at 25°C and ≤40 mA at 125°C under rated VR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 60 V - Maximum repetitive reverse blocking voltage; defines safe operating range in 48V system rails and buck-derived outputs. |
| IF | 5 A - Continuous average forward current; supports sustained load delivery in 30–60W adapter and DC/DC designs. |
| VF @ 5A, 25°C | 0.59 V (max 0.70 V) - Low conduction loss reduces heat generation and improves efficiency over silicon diodes. |
| IFSM | 110 A - Surge current handling for 8.3 ms half-sine; withstands inrush and transient overload without failure. |
| RθJL | 13 °C/W - Junction-to-lead thermal resistance enables direct heat transfer to PCB copper, simplifying thermal design. |
| CJ | 245 pF @ 1 MHz, 4 V - Low junction capacitance minimizes switching losses and EMI in >100 kHz converters. |
| TJ max | +150 °C - Extended junction temperature rating supports under-hood and enclosed industrial environments. |
Pinout & Package
Package: SOD-128 - Surface-mount, flat lead, single-anode/single-cathode configuration with cathode band marking; 0.028 g weight; UL 94V-0 molding compound; matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current input | Connected to lower-potential side (e.g., switch node or ground return); accepts 5A continuous flow. |
| Cathode | Forward current output / reverse blocking terminal | Connected to higher-potential rail; blocks up to 60V reverse voltage; marked by visible band on package. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics per stress test requirements - enables use in engine control, ADAS, and infotainment power supplies. |
| Moisture sensitivity level 1 | No bake preconditioning required before reflow - compatible with standard SMT assembly lines without special handling. |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling - ensures long-term reliability in vibration-prone automotive and industrial deployments. |
| Low VF at 125°C | 0.54 V (max 0.63 V) - Maintains efficiency under elevated ambient conditions, reducing thermal runaway risk in sealed enclosures. |
Applications
| Automotive On-Board DC/DC Converter | Industrial Switching Mode Power Supply (SMPS) |
|---|---|
Use Scenario: Step-down conversion from 12V/24V battery to 3.3V/5V logic rails in body control modules and telematics units. IC Role / Device Role / Timing Role: Output rectifier in synchronous or asynchronous buck topology, conducting during low-side switch off-time. Use Value: 0.59 V forward drop at 5A reduces conduction loss by ~35% vs. comparable silicon diodes, lowering heatsink requirements. | Use Scenario: Secondary-side rectification in open-frame 30–60W AC/DC adapters for factory automation controllers. IC Role / Device Role / Timing Role: Unidirectional current path delivering regulated DC output; handles high-frequency switching transitions with minimal reverse recovery. Use Value: 245 pF junction capacitance limits displacement current and EMI generation at 200–500 kHz switching frequencies. |
| LED Driver Power Stage | Telecom DC/DC Module |
Use Scenario: Constant-current LED string supply in commercial lighting fixtures with wide-input 9–36V DC input. IC Role / Device Role / Timing Role: Freewheeling diode in boost or buck-boost LED driver IC reference designs. Use Value: 110A surge rating accommodates cold-start inrush without degradation, extending lifetime in cyclic thermal environments. | Use Scenario: Intermediate bus converter (e.g., 48V-to-12V) in telecom shelf power systems requiring high reliability. IC Role / Device Role / Timing Role: Primary output rectifier in isolated forward or active-clamp forward topologies. Use Value: RθJL = 13 °C/W enables direct thermal coupling to chassis-mounted copper, supporting derating to 4.2A at 105°C ambient. |
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-50SQ060 | Same 60V VRRM, 5A IF, but TO-277 package (larger footprint, higher RθJA = 75 °C/W) | Not suitable for space-constrained SOD-128 layouts; requires board area redesign | Select when higher surge margin (150A IFSM) and legacy TO-277 compatibility outweigh size constraints. |
| ON Semiconductor SB560 | 60V/5A Schottky in DO-201AD; VF = 0.72V (max) at 5A - 22% higher conduction loss than SS56FSH | Lacks AEC-Q101 qualification and MSL-1 rating; not approved for automotive use | Acceptable for cost-sensitive industrial adapters where automotive qualification and thermal performance are non-critical. |
Compared with VS-50SQ060 and SB560, the SS56FSH provides optimal balance of automotive qualification, SOD-128 miniaturization, 0.59V low-VF performance, and MSL-1 process compatibility - making it preferred for next-gen compact, high-reliability power stages.
Availability
SS56FSH is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial SMPS, and LED driver power stages requiring stable component supply, AEC-Q101 compliance, and SMT-ready packaging.
Supply support for SS56FSH 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 automotive, industrial, and consumer markets since 1979.
The SS56FSH belongs to TSC's AEC-Q101-qualified Schottky rectifier family designed specifically for high-efficiency, high-reliability power conversion in automotive and harsh-environment applications.
FAQ
What is the maximum junction temperature rating for SS56FSH?
The SS56FSH has a maximum junction temperature (TJ) rating of +150°C, verified per absolute maximum ratings table. This allows operation in under-hood automotive environments and enclosed industrial power supplies where ambient temperatures exceed 105°C. Derating curves in the SS56FSH datasheet confirm usable current down to 3.2A at 125°C ambient on standard PCB mounting.
Is SS56FSH RoHS and halogen-free compliant?
Yes, SS56FSH is RoHS compliant and halogen-free per IEC 61249-2-21. The device uses matte tin-plated leads and UL 94V-0 molding compound, with no brominated flame retardants or chlorine-based additives. Certificate of Compliance is available upon request from Taiwan Semiconductor and Aetrix Electronics.
Does SS56FSH have a specified moisture sensitivity level (MSL)?
Yes, SS56FSH is rated MSL Level 1 per J-STD-020 - meaning it may be stored indefinitely at ≤30°C/60% RH and requires no baking prior to reflow soldering. This eliminates pre-conditioning steps in high-volume SMT lines and reduces manufacturing risk versus MSL-3 or MSL-5 devices.
What is the forward voltage of SS56FSH at elevated temperature?
At 5.0A and 125°C junction temperature, SS56FSH exhibits a typical forward voltage of 0.54 V with a maximum of 0.63 V. This lower VF at high temperature - compared to room-temperature values - reflects the negative temperature coefficient of Schottky diodes and improves thermal stability in high-power density designs.
Can SS56FSH replace SS54FSH or SS510FSH in an existing design?
SS56FSH is not a direct replacement for SS54FSH (40V) or SS510FSH (100V) due to differing VRRM ratings. Substitution requires verification of reverse voltage margin in the target circuit. For example, using SS56FSH in a 40V-design risks overstress; in a 100V-design, it fails to meet blocking requirements. Always validate against worst-case transient conditions before interchange.
SS56FSH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-128
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 60 V
- Current - Average Rectified (Io):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 700 mV @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 200 µA @ 60 V
- Capacitance @ Vr, F:
- 245pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-128
- Operating Temperature - Junction:
- -55°C ~ 150°C
SS56FSH FAQ
1.How can I place an order for SS56FSH through Aetrix?
Please submit a Request for Quotation (RFQ) for SS56FSH 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 SS56FSH reliable?
The price and inventory of SS56FSH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS56FSH is usually 5 days.
3.What payment methods are accepted for SS56FSH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS56FSH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS56FSH?
SS56FSH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS56FSH 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 SS56FSH?
For technical support, including SS56FSH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS56FSH requirements.
6.How does Aetrix verify that SS56FSH is sourced from the original manufacturer or authorized distributors?
All SS56FSH 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 SS56FSH meets industry standards.
7.What is the process for return or replacement of SS56FSH?
All SS56FSH units undergo pre-shipment inspection (PSI). If there is an issue with SS56FSH, 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 SS56FSH part is unused and in its original packaging.
Return procedure for SS56FSH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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