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Taiwan Semiconductor Corporation SS56ALH
- Part No.:
- SS56ALH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SS56ALH.pdf
- Description:
- 5A, 60V, SCHOTTKY RECTIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:6,924
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Product details
Overview
SS56ALH from Taiwan Semiconductor is a 5A, 60V Schottky barrier surface-mount rectifier in Thin SMA package, AEC-Q101 qualified, with forward voltage of 0.59V at 5A/25°C and reverse leakage of 200µA at 60V/25°C, used in automotive-grade DC/DC converters and SMPS secondary-side rectification.
For engineers reviewing the SS56ALH datasheet, SS56ALH pinout, SS56ALH application, or SS56ALH equivalent, key selection criteria include its 60V VRRM, 110A IFSM, 17°C/W RθJL, AEC-Q101 qualification, and Thin SMA thermal performance on 5mm×5mm Cu pad.
Technical Context
The SS56ALH is a single-die Schottky rectifier optimized for high-frequency switching applications where low forward voltage and fast recovery are critical. It operates across –55°C to +150°C junction temperature range and delivers 5A average forward current with 0.59V typical VF at rated load and 25°C.
Its 60V repetitive peak reverse voltage and 200µA max reverse leakage at 25°C support reliable operation in 48V automotive and industrial power rails. Thermal resistance values (RθJL = 17°C/W, RθJA = 78°C/W) are measured on standard 5mm×5mm copper pad PCBs per JEDEC test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 60 V - Maximum reverse blocking voltage for 48V system-level designs |
| IF | 5 A - Continuous DC forward current rating at TA = 25°C |
| IFSM | 110 A - Surge withstand capability for 8.3ms half-sine, enabling robust start-up handling |
| VF @ 5A, 25°C | 0.59 V (typ), 0.70 V (max) - Low conduction loss improves efficiency in high-current paths |
| IR @ 60V, 25°C | 200 µA (max) - Minimal leakage preserves standby power integrity |
| TJ Range | –55°C to +150°C - Supports under-hood automotive and industrial ambient environments |
| RθJL | 17 °C/W - Enables direct thermal path to PCB copper, critical for compact power layouts |
Pinout & Package
Package: Thin SMA (Surface Mount Assembly), molded in UL 94V-0 compound, matte tin-plated leads, cathode indicated by band, weight ≈ 0.028g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current input | Connected to lower-potential side (e.g., transformer secondary center-tap or switch node) |
| Cathode | Forward current output / reverse voltage reference | Connected to output rail; polarity marked by visible cathode band on package body |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress-test requirements including temperature cycling, HTRB, and ESD |
| Low forward voltage | 0.59V typ @ 5A/25°C reduces conduction loss and thermal rise in high-efficiency SMPS |
| High surge capability | 110A IFSM (8.3ms) supports transient overload without failure in adapter and converter inputs |
| Moisture sensitivity level 1 | No bake required before reflow; compatible with standard SMT assembly processes |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive for environmentally restricted materials |
Applications
| Automotive On-Board DC/DC Converter | Industrial Switching Mode Power Supply |
|---|---|
Use Scenario: Step-down conversion from 48V battery rail to 12V/5V subsystems in ADAS and infotainment modules. IC Role / Device Role / Timing Role: Secondary-side Schottky rectifier replacing diode-based synchronous rectification in flyback or forward topologies. Use Value: 0.59V VF minimizes power loss at 5A load, reducing heatsink requirement and improving thermal margin over silicon diodes. | Use Scenario: High-density AC-DC front-end and isolated DC-DC stages in programmable logic controllers and motor drives. IC Role / Device Role / Timing Role: Output rectifier in high-frequency (<1 MHz) flyback or LLC resonant converters. Use Value: 110A surge rating and 150°C TJ enable stable operation during line transients and extended duty cycles. |
| Consumer Adapter Secondary Rectification | LED Driver Constant-Current Stage |
Use Scenario: Compact wall adapters for laptops and USB-PD accessories requiring >5W output with minimal footprint. IC Role / Device Role / Timing Role: Output rectifier in quasi-resonant flyback converters operating at 65–130 kHz. Use Value: Thin SMA package allows dense layout; 0.028g mass supports automated pick-and-place with high yield. | Use Scenario: Constant-current regulation stage in high-brightness LED drivers for street lighting and commercial fixtures. IC Role / Device Role / Timing Role: Freewheeling path in buck-derived current-regulated topologies with PWM dimming. Use Value: 200µA max IR at 25°C ensures minimal current diversion during dimming intervals, preserving regulation accuracy. |
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 SMA package (not Thin SMA); RθJA = 80°C/W vs. 78°C/W | Compatible in non-space-constrained layouts; slightly higher thermal resistance limits high-power density use | Select when standard SMA footprint is preferred and board area permits larger pad design |
| ON Semiconductor SB560-E3/54 | 60V VRRM, 5A IF, DO-214AA package; VF = 0.72V @ 5A - 22% higher than SS56ALH | Higher conduction loss increases thermal load; not AEC-Q101 qualified | Choose only for cost-sensitive industrial applications where automotive qualification is unnecessary |
Compared with VS-50SQ060 and SB560-E3/54, the SS56ALH offers superior thermal performance (17°C/W RθJL), AEC-Q101 compliance, and lowest VF in its class-making it optimal for space- and efficiency-critical automotive and industrial converters.
Availability
SS56ALH is available at Aetrix Electronics and suitable for automotive on-board DC/DC converters, industrial switching mode power supplies, and consumer adapter secondary rectification requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SS56ALH 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 Company (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS, MOSFETs, and IGBTs, with global distribution and AEC-Q101 validation capability.
The SS56ALH belongs to TSC's SS5xALH Schottky rectifier family, designed specifically for high-efficiency, high-reliability automotive and industrial power conversion where low VF, surge robustness, and thin-profile packaging are essential.
FAQ
What is the maximum junction temperature rating for the SS56ALH?
The SS56ALH has a maximum junction temperature (TJ) rating of +150°C, with operational range from –55°C to +150°C. This enables deployment in under-hood automotive environments and thermally demanding industrial enclosures. The device maintains specified electrical performance within this full range, and thermal derating curves in the datasheet guide safe current limits at elevated temperatures. SS56ALH must be mounted on a PCB with appropriate copper area to maintain TJ ≤ 150°C under load.
Is the SS56ALH suitable for automotive applications?
Yes, the SS56ALH is AEC-Q101 qualified, meaning it has passed rigorous stress tests including high-temperature reverse bias, temperature cycling, and highly accelerated life testing. Its 60V VRRM, 150°C TJ, and moisture sensitivity level 1 make it suitable for automotive on-board DC/DC converters and lighting control modules. SS56ALH is explicitly intended for automotive-grade power systems-not medical or life-sustaining applications.
What is the forward voltage of SS56ALH at 5A and 125°C?
The SS56ALH exhibits a typical forward voltage of 0.54V and a maximum of 0.63V at 5A and 125°C junction temperature. This reduced VF versus room temperature (0.59V typ at 25°C) reflects the negative temperature coefficient of Schottky diodes. SS56ALH maintains stable conduction characteristics across its full operating temperature range, supporting consistent efficiency in thermally dynamic systems.
Does the SS56ALH have a halogen-free construction?
Yes, the SS56ALH is halogen-free in accordance with IEC 61249-2-21 and RoHS compliant. The molding compound, lead finish, and internal materials meet strict environmental regulations for restricted substances. This makes SS56ALH suitable for export-compliant consumer, industrial, and automotive electronics where material declarations and substance restrictions apply.
What is the surge current rating of SS56ALH and how is it tested?
The SS56ALH has a peak forward surge current (IFSM) rating of 110A for an 8.3ms half-sine wave and 285A for a 1.0ms pulse, per JEDEC standards. These values reflect short-duration overload capability during power-up, inrush, or fault conditions. SS56ALH maintains structural integrity and electrical functionality after such events when operated within its absolute maximum ratings, making it robust for adapter and SMPS applications with variable input conditions.
SS56ALH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-221AC, SMA Flat Leads
- 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:
- Thin SMA
- Operating Temperature - Junction:
- -55°C ~ 150°C
SS56ALH FAQ
1.How can I place an order for SS56ALH through Aetrix?
Please submit a Request for Quotation (RFQ) for SS56ALH 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 SS56ALH reliable?
The price and inventory of SS56ALH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS56ALH is usually 5 days.
3.What payment methods are accepted for SS56ALH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS56ALH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS56ALH?
SS56ALH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS56ALH 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 SS56ALH?
For technical support, including SS56ALH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS56ALH requirements.
6.How does Aetrix verify that SS56ALH is sourced from the original manufacturer or authorized distributors?
All SS56ALH 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 SS56ALH meets industry standards.
7.What is the process for return or replacement of SS56ALH?
All SS56ALH units undergo pre-shipment inspection (PSI). If there is an issue with SS56ALH, 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 SS56ALH part is unused and in its original packaging.
Return procedure for SS56ALH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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