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Taiwan Semiconductor Corporation SA30
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- Part No.:
- SA30
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA30.pdf
- Description:
- 500W, 37V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,399
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Product details
Overview
SA30 from Taiwan Semiconductor is a unidirectional 500W transient voltage suppressor (TVS) diode with 30V working stand-off voltage, 33.3–40.7V breakdown voltage at 1mA test current, and 53.3V maximum clamping voltage at 9.8A peak pulse current. It features fast response time (<1.0ps), low leakage (<1μA above 10V), and DO-204AC (DO-15) package for automotive-grade surge protection in power supply rails.
For engineers reviewing the SA30 datasheet, SA30 pinout, SA30 application, or SA30 equivalent, this device is selected for high-reliability DC bus protection in automotive lighting modules, industrial PLC I/O circuits, and 24V/48V telecom power interfaces where sub-100ns clamping response and AEC-Q101 qualification are critical.
Technical Context
The SA30 operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (33.3–40.7V). Its clamping action limits transients to ≤53.3V at 9.8A under 10/1000μs waveform, enabling robust protection of downstream MOSFETs and controllers without sacrificing system efficiency.
Designed for operation from –55°C to +175°C junction temperature, it maintains stable VBR temperature coefficient of 39mV/°C and meets UL 94V-0 flammability rating. The pure tin-plated leads comply with J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30V - Maximum continuous reverse operating voltage before conduction begins |
| VBR @ IT=1mA | 33.3–40.7V - Breakdown voltage range defining turn-on threshold under standardized test |
| VC @ IPPM=9.8A | 53.3V - Clamped voltage during 10/1000μs surge, limiting stress on protected ICs |
| PPK | 500W - Peak pulse power handling capability per single non-repetitive transient |
| IR @ VWM | <1μA - Ultra-low leakage ensures minimal standby power loss in always-on systems |
| TJ max | +175°C - Enables placement near hot components like power inductors or MOSFETs |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package with 0.400g mass and RoHS/halogen-free compliance |
Pinout & Package
DO-204AC (DO-15) package with axial leads: cathode indicated by band-marked end; anode is unmarked lead. Designed for through-hole mounting on PCBs with 10×10mm copper pads per terminal for thermal derating compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line; conducts transient energy to ground when VREV > VBR |
| Anode (unmarked end) | Reference/ground return | Typically tied to system ground or low-impedance return path for clamping loop integrity |
Key Features
| Feature | Design Value |
|---|---|
| 500W peak pulse power rating | Supports IEC 61000-4-5 Level 4 (4kV) surge immunity without external series impedance |
| <1.0ps response time | Clamps ESD and fast transients before sensitive logic or analog circuitry is damaged |
| AEC-Q101 qualified variant available (SA30H) | Validated for automotive under-hood applications including engine control and lighting modules |
| UL 94V-0 molding compound | Prevents flame propagation in enclosed enclosures during fault conditions |
| JESD201 Class 2 whisker resistance | Ensures long-term reliability in high-temperature, high-humidity environments |
Applications
| Automotive LED Headlamp Driver Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting microcontroller GPIO and driver FETs from load dump and inductive kickback in 12V/24V LED headlamp systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between supply rail and ground to clamp transients before they reach the driver IC. Use Value: Limits clamping voltage to 53.3V, well below typical 60V MOSFET VDSS, preventing gate oxide damage and ensuring ASIL-B compliance. | Use Scenario: Safeguarding 24V digital input channels on programmable logic controllers against field wiring surges and EFT bursts. IC Role / Device Role / Timing Role: Standoff protection element mounted directly at connector entry point to shunt fast transients before signal conditioning circuitry. Use Value: Sub-1.0ps response captures nanosecond-scale EFT events (IEC 61000-4-4), reducing false triggering and improving channel uptime. |
| Telecom 48V DC Power Supply Rail | Smart Building HVAC Sensor Interface |
Use Scenario: Securing primary-side rectifier output and secondary-side DC-DC converter inputs in telecom power systems exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on 48V bus to absorb 500W surges while maintaining low leakage for standby monitoring circuits. Use Value: 30V VWM allows safe operation across 48V nominal ±10% tolerance, with 53.3V clamping preserving 60V-rated downstream capacitors and regulators. | Use Scenario: Protecting RS-485 transceivers and microcontroller ADC inputs in HVAC zone controllers connected to long sensor cables. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (used with companion diode) guarding differential data lines against induced transients. Use Value: Low 1μA leakage at 30V prevents signal offset drift in precision 0–10V analog sensor interfaces over 10+ year deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A | Same DO-214AC package; bidirectional; 33.3–36.8V VBR; 53.3V VC at 9.8A | Requires no polarity awareness; suitable for AC-coupled or floating signal lines | Select SMAJ30A only if bidirectional clamping is required; SA30 offers lower cost and tighter VBR tolerance for DC rail use. |
| P6SMB30A | DO-214AA package; same electrical specs; higher thermal resistance due to smaller pad area | Limited to lower average power dissipation in compact layouts | Choose P6SMB30A only when footprint compatibility with legacy SMB designs is mandatory; SA30 provides superior thermal performance with DO-15 pads. |
Compared with SMAJ30A and P6SMB30A, the SA30 delivers identical clamping performance in a DO-204AC package optimized for through-hole reliability and thermal management-making it preferred for high-vibration automotive and industrial environments where mechanical robustness matters.
Availability
SA30 is available at Aetrix Electronics and suitable for automotive lighting systems, industrial PLC I/O modules, and telecom 48V power supplies requiring stable component supply with full traceability and long-lifecycle support.
Supply support for SA30 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, TVS diodes, and rectifiers since 1979.
The SA Series is designed specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure-emphasizing AEC-Q101 qualification, tight parametric tolerances, and robust packaging for harsh-environment deployment.
FAQ
What is the maximum clamping voltage of the SA30 under standard 10/1000μs surge conditions?
The SA30 exhibits a maximum clamping voltage (VC) of 53.3V at 9.8A peak pulse current under the 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees predictable voltage limiting during standardized surge events, protecting downstream 60V-rated components in 24V and 48V systems.
Is the SA30 unidirectional or bidirectional, and how does that affect circuit placement?
The SA30 is a unidirectional TVS diode, with cathode marked by a band. It must be oriented with cathode toward the protected line and anode to ground. Unlike bidirectional variants, it blocks forward current and only clamps reverse transients-ideal for DC power rails where polarity is fixed and leakage minimization is critical.
Does the SA30 meet automotive qualification standards?
Yes-the SA30H variant is AEC-Q101 qualified for automotive applications. While the base SA30 is not certified, its construction (JESD201 Class 2 whisker resistance, UL 94V-0 molding, and 175°C TJ max) aligns with automotive reliability requirements. For production automotive use, specify SA30H to ensure full qualification documentation and lot traceability.
What is the thermal derating behavior of the SA30 above 25°C ambient?
The SA30's peak pulse power (500W) is rated at TA = 25°C and derates linearly per Figure 2 in the datasheet: at 75°C ambient, it retains ~70% of rated power (~350W), and at 125°C, ~40% (~200W). For sustained surge duty, thermal design must include 10×10mm copper pads per lead and avoid enclosure hot spots exceeding 125°C board temperature.
Can the SA30 replace the SMAJ30A in existing designs without layout changes?
No-SA30 uses DO-204AC (DO-15) axial package, while SMAJ30A uses DO-214AC (SMA) surface-mount package. Pin-to-pin replacement is not possible. To migrate, redesign the footprint for axial leads and verify mechanical clearance, vibration tolerance, and thermal pad layout. Electrical performance is comparable, but mechanical integration requires revision.
SA30 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- SA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 9.8A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA30 FAQ
1.How can I place an order for SA30 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA30 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 SA30 reliable?
The price and inventory of SA30 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA30 is usually 5 days.
3.What payment methods are accepted for SA30?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA30 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA30?
SA30 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA30 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 SA30?
For technical support, including SA30 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA30 requirements.
6.How does Aetrix verify that SA30 is sourced from the original manufacturer or authorized distributors?
All SA30 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 SA30 meets industry standards.
7.What is the process for return or replacement of SA30?
All SA30 units undergo pre-shipment inspection (PSI). If there is an issue with SA30, 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 SA30 part is unused and in its original packaging.
Return procedure for SA30:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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