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Taiwan Semiconductor Corporation SA30A
- Part No.:
- SA30A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA30A.pdf
- Description:
- TVS DIODE 30VWM 64.3VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,577
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Product details
Overview
SA30A from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, designed for high-energy surge protection in automotive and industrial power rails. It features a 30 V working stand-off voltage (VWM), 33.3–36.8 V breakdown voltage (VBR) at 1 mA test current, 64.3 V maximum clamping voltage (VC) at 10.8 A peak pulse current, and 500 W peak pulse power rating per 10/1000 μs waveform.
For engineers reviewing the SA30A datasheet, SA30A pinout, SA30A application, or SA30A equivalent, this device is selected for robust ESD and lightning surge immunity in 24 V DC systems-especially where low clamping voltage, sub-1 μA reverse leakage above 10 V, and AEC-Q101 qualification are required.
Technical Context
The SA30A operates as a silicon avalanche diode with unidirectional polarity, triggered when transient voltage exceeds its breakdown threshold. Its low dynamic impedance ensures rapid energy shunting during fast transients, with typical response time under 1.0 ps from 0 V to VBR.
It is rated for 175 °C maximum junction temperature and supports steady-state power dissipation of 3 W at 75 °C lead temperature. The device complies with IEC 61249-2-21 halogen-free requirements and meets JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous DC or RMS voltage the device blocks without conduction |
| VBR min/max | 33.3 V / 36.8 V at 1 mA - Confirmed avalanche onset range ensuring reliable triggering margin above VWM |
| VC @ IPPM | 64.3 V at 10.8 A - Clamped voltage during 10/1000 μs surge, limiting downstream stress to ≤64.3 V |
| PPK | 500 W - Peak surge power handling capability per standard 10/1000 μs waveform |
| IR @ VWM | <1 μA - Negligible leakage current at operating voltage, minimizing standby power loss |
| TJ max | 175 °C - Enables operation in under-hood automotive environments and high-ambient industrial enclosures |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, epoxy-molded case with cathode band marking for unidirectional polarity. Meets UL 94V-0 flammability rating and J-STD-002 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to system ground or return path; defines current flow direction during clamping |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 24 V rail); carries transient current into ground via avalanche conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification |
| Clamping voltage ≤64.3 V | Ensures protected ICs (e.g., CAN transceivers, microcontrollers) remain below absolute maximum ratings during 10.8 A surges |
| Reverse leakage <1 μA at 30 V | Prevents measurable power drain in always-on 24 V circuits such as battery-backed control modules |
| Fast response <1.0 ps | Activates before most semiconductor damage mechanisms initiate, critical for protecting high-speed interface ICs |
| Halogen-free & RoHS compliant | Meets environmental compliance mandates for global automotive and industrial OEM supply chains |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: 24 V battery-supplied ECUs exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power input, placed upstream of DC-DC converters and LDOs. Use Value: Limits transient voltage to ≤64.3 V during 10.8 A surges, preventing latch-up or gate oxide rupture in downstream PMICs. |
Use Scenario: Digital input modules receiving 24 V dry-contact signals in factory automation cabinets. IC Role / Device Role / Timing Role: Front-end transient absorber on signal lines subject to relay coil kickback and EFT bursts. Use Value: Sub-1 μA leakage avoids false triggering of optocoupler inputs; 500 W rating handles repetitive inductive spikes. |
| LED Driver Overvoltage Clamp | Telecom Power Interface Protection |
Use Scenario: Constant-current LED drivers powered from 24–36 V supplies in streetlighting systems. IC Role / Device Role / Timing Role: Parallel-connected TVS across driver input terminals to absorb lightning-induced surges on long outdoor wiring. Use Value: 175 °C TJ max enables mounting near heat-generating LED drivers; DO-15 package allows through-hole ruggedization. |
Use Scenario: 48 V DC power feed to remote telecom nodes with limited board space and high reliability demands. IC Role / Device Role / Timing Role: First-line defense against induced surges on PoE-like power interfaces before DC-DC isolation stages. Use Value: 64.3 V clamping ensures secondary-side regulators receive no more than safe input transients, preserving isolation barrier integrity. |
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 (SMA), 33.3–36.8 V VBR, but lower 400 W PPK rating and higher 69.4 V VC at 8.3 A | Less suitable for high-energy 10/1000 μs surges requiring ≥500 W headroom | Select SA30A when 500 W surge rating and lower clamping voltage are mandatory for 24 V system robustness |
| P6SMB30A | DO-214AA (SMB) package, identical VWM/VBR specs, but 64.5 V VC at 10.3 A and RoHS-compliant only (not halogen-free) | Lacks halogen-free certification and AEC-Q101 qualification; not approved for automotive use | Choose SA30A for automotive or regulated industrial deployments requiring full material compliance and qualification traceability |
Compared with SMAJ30A and P6SMB30A, the SA30A delivers superior surge energy handling (500 W vs. ≤400 W), tighter clamping (64.3 V vs. ≥64.5 V), and certified AEC-Q101/halogen-free compliance-making it the preferred choice for mission-critical 24 V power rail protection where reliability and regulatory alignment are non-negotiable.
Availability
SA30A is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC input conditioning, and LED driver overvoltage protection requiring stable component supply across multi-year production cycles.
Supply support for SA30A 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 SA Series TVS diodes are engineered specifically for high-reliability transient suppression in harsh environments, emphasizing AEC-Q101 qualification, tight parametric consistency, and robust surge endurance in axial-leaded packages.
FAQ
What is the clamping voltage of the SA30A under standard 10/1000 μs surge conditions?
The SA30A exhibits a maximum clamping voltage (VC) of 64.3 V when subjected to a 10.8 A peak pulse current defined by the 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry downstream will not experience voltages exceeding 64.3 V during standardized surge events. The SA30A's clamping performance is confirmed in the official Taiwan Semiconductor datasheet revision L2105.
Is the SA30A unidirectional or bidirectional, and how is polarity identified?
The SA30A is a unidirectional TVS diode, intended for DC line protection with defined anode and cathode terminals. Polarity is marked by a cathode band on the DO-204AC (DO-15) package body, consistent with standard diode marking conventions. Bidirectional variants in the SA Series carry a "C" or "CA" suffix (e.g., SA30CA), which the SA30A does not include. This distinction is explicitly stated in the SA SERIES documentation.
Does the SA30A meet AEC-Q101 qualification, and what does that entail for automotive use?
Yes, the SA30A is AEC-Q101 qualified, as confirmed in the SA SERIES documentation (Version L2105). This qualification includes stress testing for high-temperature reverse bias, temperature cycling, highly accelerated life testing, and ESD robustness-ensuring suitability for automotive powertrain, chassis, and body electronics. The "H" suffix (e.g., SA30AH) denotes AEC-Q101 compliance, and SA30A is part of that qualified family.
What is the maximum junction temperature rating for the SA30A, and how does it impact thermal design?
The SA30A has a maximum junction temperature (TJ max) of 175 °C, enabling operation in high-ambient environments such as engine compartments or sealed industrial enclosures. This rating allows designers to size heatsinking or PCB copper area based on steady-state power dissipation (3 W at TL = 75 °C), while maintaining safety margins during transient events. The 175 °C limit is specified in the Absolute Maximum Ratings table of the SA30A datasheet.
How does the SA30A compare to the SA30 (non-A) variant in terms of electrical performance?
The SA30A offers tighter breakdown voltage tolerance (33.3–36.8 V) versus the SA30 (33.3–40.7 V), resulting in more predictable clamping behavior and reduced risk of premature conduction. Both share identical VWM (30 V), PPK (500 W), and package (DO-15), but the "A" suffix denotes enhanced VBR uniformity-critical for designs requiring precise overvoltage thresholds. This distinction is documented in the MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS tables.
SA30A 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:
- 64.3V
- Current - Peak Pulse (10/1000µs):
- 10.8A
- 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)
SA30A FAQ
1.How can I place an order for SA30A through Aetrix?
Please submit a Request for Quotation (RFQ) for SA30A 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 SA30A reliable?
The price and inventory of SA30A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA30A is usually 5 days.
3.What payment methods are accepted for SA30A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA30A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA30A?
SA30A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA30A 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 SA30A?
For technical support, including SA30A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA30A requirements.
6.How does Aetrix verify that SA30A is sourced from the original manufacturer or authorized distributors?
All SA30A 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 SA30A meets industry standards.
7.What is the process for return or replacement of SA30A?
All SA30A units undergo pre-shipment inspection (PSI). If there is an issue with SA30A, 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 SA30A part is unused and in its original packaging.
Return procedure for SA30A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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