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Taiwan Semiconductor Corporation S2AAH
- Part No.:
- S2AAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
S2AAH.pdf
- Description:
- 1.5A, 50V, STANDARD RECTIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:6,138
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Product details
Overview
S2AAH from Taiwan Semiconductor is a surface-mount general-purpose silicon rectifier diode with 50 V repetitive peak reverse voltage (VRRM), 1.5 A average forward current (IF), and 50 A peak forward surge current (IFSM); it features glass passivated junction, AEC-Q101 qualification, and DO-214AC (SMA) package for automotive lighting and DC-DC converter applications.
For engineers reviewing the S2AAH datasheet, S2AAH pinout, S2AAH application, or S2AAH equivalent, key selection criteria include VRRM=50 V, IF=1.5 A, VF≤1.1 V at 1.5 A, IR≤5 µA at 25°C, and thermal resistance RθJA=53 °C/W - all critical for high-reliability, space-constrained power conversion designs.
Technical Context
The S2AAH is a single-die, unidirectional silicon rectifier optimized for low-loss AC-to-DC conversion in compact surface-mount layouts. Its glass-passivated junction ensures stable reverse leakage (IR ≤ 5 µA @ 25°C) and robust surge tolerance (IFSM = 50 A, 8.3 ms half-sine).
Thermally, the DO-214AC (SMA) package delivers RθJL = 16 °C/W and RθJA = 53 °C/W, enabling reliable operation up to TJ = 150°C in automotive ambient conditions without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - maximum repetitive reverse voltage before breakdown; defines safe operating range in 12–24 V automotive systems. |
| IF | 1.5 A - continuous average forward current; supports medium-power rectification in DC-DC converters and LED drivers. |
| IFSM | 50 A - non-repetitive surge rating; withstands inrush currents during cold-start or load dump events. |
| VF | ≤1.1 V @ 1.5 A - low forward drop reduces conduction loss and thermal stress in high-duty-cycle operation. |
| IR | ≤5 µA @ 25°C - minimal reverse leakage preserves efficiency in high-impedance bias networks and snubber circuits. |
| TJ max | 150 °C - junction temperature limit compatible with under-hood automotive environments. |
| RθJA | 53 °C/W - thermal resistance enables ~2.8 W dissipation at ΔT = 150°C in standard PCB layout (JEDEC 2S2P). |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-anode/single-cathode configuration; polarity indicated by cathode band; matte tin-plated leads, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (lead 1) | Forward current entry point | Connected to AC input or transformer secondary; must handle full IF and IFSM without trace overheating. |
| Cathode (lead 2) | Forward current exit / reverse blocking terminal | Connected to output capacitor or load; cathode band marks this terminal for correct PCB orientation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD47. |
| Glass passivated junction | Eliminates moisture-induced degradation and improves long-term IR stability in humid environments. |
| Low VF (≤1.1 V @ 1.5 A) | Reduces power loss by >15% vs. legacy 1N400x series at same current, lowering heatsink requirements. |
| Junction capacitance (CJ = 30 pF) | Minimizes high-frequency switching noise in snubber and flyback auxiliary winding applications. |
| Moisture sensitivity level 1 | Enables direct placement without baking; eliminates production delay and moisture-related popcorning risk. |
Applications
| Automotive LED Lighting | DC-DC Converter Output Rectification |
|---|---|
Use Scenario: Rectifying 12 V battery-derived AC from boost or flyback stages to drive high-brightness LED arrays in headlamps and DRLs. IC Role / Device Role / Timing Role: Primary unidirectional power switch converting pulsed transformer output to regulated DC. Use Value: Low VF and AEC-Q101 qualification ensure consistent light output and 15-year lifetime under thermal cycling and vibration. | Use Scenario: Output stage rectification in isolated 5–24 V DC-DC modules powering infotainment or ADAS ECUs. IC Role / Device Role / Timing Role: Freewheeling diode conducting during MOSFET off-time in synchronous or quasi-resonant topologies. Use Value: 50 A IFSM handles transient overloads; 53 °C/W RθJA allows operation at full load without derating on 2-layer boards. |
| Snubber Network Protection | General-Purpose AC/DC Adapter |
Use Scenario: Clamping voltage spikes across MOSFETs or IGBTs in motor control inverters using RC-snubber circuits. IC Role / Device Role / Timing Role: Fast-recovery (trr = 1500 ns) clamp diode absorbing inductive energy during switching transitions. Use Value: CJ = 30 pF limits capacitive loading on gate drivers; glass passivation prevents IR drift under repeated surge stress. | Use Scenario: Input bridge or output rectifier in universal-input (90–264 VAC) wall adapters for consumer electronics. IC Role / Device Role / Timing Role: General-purpose rectifier handling line-frequency or high-frequency rectification with minimal footprint. Use Value: DO-214AC (SMA) enables automated placement; RoHS/halogen-free compliance meets global regulatory requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rectifier diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MUR120 | VRRM = 200 V, VF = 0.93 V @ 1 A, trr = 75 ns - faster but higher voltage rating and lower surge capability (IFSM = 30 A). | Not AEC-Q101 qualified; intended for industrial/commercial SMPS, not automotive under-hood use. | Select only if faster recovery and lower VF at reduced current are prioritized over surge margin and automotive qualification. |
| Vishay VS-1N5408-M3/54 | VRRM = 1000 V, IF = 3 A, VF = 1.2 V @ 3 A - higher voltage/current but larger DO-201AD package and no AEC-Q101 certification. | Designed for general-purpose linear power supplies; lacks moisture level 1 rating and automotive thermal cycling validation. | Choose when higher voltage headroom and legacy through-hole compatibility are required, not for new automotive SMT designs. |
Compared with MUR120 and VS-1N5408-M3/54, the S2AAH uniquely balances AEC-Q101 compliance, DO-214AC SMT fit, 50 V VRRM precision for 12 V systems, and 50 A IFSM - making it optimal for cost-sensitive, thermally constrained automotive rectification where reliability and manufacturability are co-prioritized.
Availability
S2AAH is available at Aetrix Electronics and suitable for automotive LED lighting, DC-DC converter output rectification, and snubber network protection requiring stable component supply across production lifecycles.
Supply support for S2AAH 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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs, with ISO/TS 16949 and AEC-Q200 certified production lines.
The S2AAH belongs to TSC's S2x series of AEC-Q101-qualified surface-mount rectifiers, engineered specifically for automotive power conversion where reliability, thermal performance, and automated assembly compatibility are essential.
FAQ
What is the maximum junction temperature rating for the S2AAH?
The S2AAH has a maximum junction temperature (TJ max) of +150°C, validated per AEC-Q101 stress test conditions. This rating allows continuous operation in under-hood automotive environments where ambient temperatures reach 125°C, provided thermal design maintains junction temperature below 150°C. The S2AAH's RθJA of 53 °C/W enables this with appropriate PCB copper area and airflow. Derating curves in the official S2AAH datasheet confirm usable current down to 0.8 A at 125°C ambient.
Is the S2AAH pin-compatible with other parts in the S2xAH family?
No - while all S2xAH parts share the DO-214AC (SMA) package and anode/cathode pinout, the S2AAH is electrically distinct due to its 50 V VRRM rating. Substituting S2BAH (100 V) or S2DAH (200 V) may cause premature breakdown in 50 V-rated circuits. The S2AAH marking code "S2AA" is unique to this voltage grade, and mechanical compatibility does not imply electrical interchangeability.
Does the S2AAH meet automotive reliability standards?
Yes - the S2AAH is explicitly AEC-Q101 qualified, covering stress tests including high-temperature reverse bias (HTRB), temperature cycling, and unbiased highly accelerated stress testing (UHAST). It also meets JESD201 Class 2 whisker resistance and J-STD-020 moisture sensitivity level 1, confirming suitability for reflow-soldered automotive electronics without pre-baking.
What is the typical forward voltage drop of the S2AAH at rated current?
The S2AAH exhibits a maximum forward voltage (VF) of 1.1 V at IF = 1.5 A and TJ = 25°C, per the manufacturer's electrical specifications. Typical VF is lower (~0.95 V), but design margins should use the 1.1 V max value. This low VF reduces conduction losses by ~20% compared to legacy 1N400x diodes, directly improving efficiency in 12 V automotive power rails where the S2AAH is commonly deployed.
Can the S2AAH be used in snubber circuits?
Yes - the S2AAH is specified for snubber applications per its official documentation. With CJ = 30 pF and trr = 1500 ns, it provides predictable clamping behavior in RC snubbers across MOSFETs in motor drivers and DC-DC controllers. Its glass-passivated junction ensures stable IR under repeated surge stress, and the 50 A IFSM rating accommodates transient energy absorption without degradation - key for long-term snubber reliability in automotive systems.
S2AAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 1.5A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 1.5 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 1.5 µs
- Current - Reverse Leakage @ Vr:
- 5 µA @ 50 V
- Capacitance @ Vr, F:
- 30pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 150°C
S2AAH FAQ
1.How can I place an order for S2AAH through Aetrix?
Please submit a Request for Quotation (RFQ) for S2AAH 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 S2AAH reliable?
The price and inventory of S2AAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S2AAH is usually 5 days.
3.What payment methods are accepted for S2AAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S2AAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S2AAH?
S2AAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S2AAH 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 S2AAH?
For technical support, including S2AAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S2AAH requirements.
6.How does Aetrix verify that S2AAH is sourced from the original manufacturer or authorized distributors?
All S2AAH 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 S2AAH meets industry standards.
7.What is the process for return or replacement of S2AAH?
All S2AAH units undergo pre-shipment inspection (PSI). If there is an issue with S2AAH, 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 S2AAH part is unused and in its original packaging.
Return procedure for S2AAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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