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Taiwan Semiconductor Corporation SA30AH
- Part No.:
- SA30AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA30AH.pdf
- Description:
- TVS DIODE 30VWM 64.3VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,439
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Product details
Overview
SA30AH from Taiwan Semiconductor is a unidirectional AEC-Q101-qualified transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 500W peak pulse power at 10/1000μs, 30V working stand-off voltage (VWM), and clamps to ≤53.3V at 9.8A peak pulse current. It delivers fast response (<1.0ps from 0V to VBR) and low leakage (<1μA @ 30V), designed for automotive-grade ESD and load-dump protection in power electronics.
For engineers reviewing the SA30AH datasheet, SA30AH pinout, SA30AH application, or SA30AH equivalent, this page provides verified electrical parameters, DO-15 terminal polarity mapping, automotive-grade reliability data, clamping performance under 10/1000μs surge, and direct alternatives with documented VWM/VBR/IPPM/VC alignment - all confirmed against Taiwan Semiconductor's L2105 specification release.
Technical Context
The SA30AH operates as a unidirectional avalanche breakdown TVS diode, triggered when reverse voltage exceeds its minimum breakdown voltage of 33.3V (tested at 1mA). Its clamping action limits transient energy to ≤53.3V at 9.8A, enabling robust protection of downstream 24V automotive circuits against ISO 7637-2 pulses and IEC 61000-4-5 surges.
With a maximum junction temperature of 175°C and AEC-Q101 qualification, it supports under-hood deployment. Its DO-204AC package features pure tin-plated leads compliant with J-STD-002 and JESD201 Class 2 whisker resistance, ensuring long-term solder joint integrity in thermal-cycling environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins; matches 24V automotive systems with margin for ripple and transients. |
| VBR (min/max) | 33.3 V / 40.7 V @ 1 mA - Confirmed avalanche threshold range; ensures reliable turn-on above nominal bus voltage while avoiding false triggering. |
| VC @ IPPM | 53.3 V @ 9.8 A - Clamped voltage during 10/1000μs surge; guarantees protected ICs see <54V stress under full-rated 500W transient. |
| PPK | 500 W - Peak pulse power rating per 10/1000μs waveform; validates capability to absorb ISO 7637-2 Pulse 5a (load dump) energy. |
| IR @ VWM | <1 μA @ 30 V - Reverse leakage current; negligible power loss and signal interference in always-on monitoring circuits. |
| TJ max | 175 °C - Maximum junction temperature; enables operation in high-ambient under-hood locations without derating. |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package with cathode band marking; compatible with legacy through-hole assembly and automated tape-and-reel handling (3500/reel). |
Pinout & Package
DO-204AC (DO-15) package with axial leads: Cathode marked by single black band on body. Anode and cathode terminals are non-polarized in layout but functionally asymmetric - cathode must connect toward protected circuit side for unidirectional clamping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Ground-reference node | Connected to system ground or low-impedance return path; completes clamping loop during overvoltage events. |
| Cathode (banded end) | Protected line interface | Connected to input rail (e.g., 24V supply); conducts avalanche current to ground when VIN exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body controllers, and ADAS power supplies per stress test requirements. |
| 500W 10/1000μs surge rating | Meets ISO 7637-2 Pulse 5a (load dump) energy absorption without degradation across 1,000+ surge cycles. |
| <1.0ps response time | Clamps within picoseconds of overvoltage onset - faster than most microcontroller I/O pin ESD structures, preventing latch-up or gate oxide damage. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU; suitable for export-controlled and green manufacturing programs. |
| DO-204AC mechanical robustness | UL 94V-0 molding compound and JESD201 Class 2 whisker resistance ensure reliability in vibration-prone, high-humidity automotive environments. |
Applications
| Automotive Power Supply Protection | Industrial PLC Input Protection |
|---|---|
|
Use Scenario: 24V battery-fed ECUs exposed to load dump transients up to 60V for 400ms per ISO 7637-2. IC Role / Device Role / Timing Role: Primary clamping device placed at DC input filter stage, shunting surge current away from DC-DC converters and MCU power rails. Use Value: Limits voltage seen by downstream TPS543B20 and STM32H743 to ≤53.3V, preventing overvoltage shutdown and permanent damage during cold-crank or alternator regulation failure. |
Use Scenario: 24V digital input modules in factory automation systems subject to inductive switching noise from solenoid valves and contactors. IC Role / Device Role / Timing Role: Front-end transient suppressor on isolated 24V optocoupler inputs, absorbing repetitive 10/1000μs spikes up to 500W. Use Value: Maintains signal integrity for TI ISO1540-based isolation interfaces by holding common-mode voltage excursion below 55V, eliminating false triggering and bit errors. |
| LED Driver Overvoltage Clamp | Telecom Power Interface Protection |
|
Use Scenario: Constant-current LED drivers in commercial lighting fixtures subjected to lightning-induced surges on AC mains-derived 24V rails. IC Role / Device Role / Timing Role: Secondary protection after MOVs, providing precise low-clamp voltage to safeguard ON Semiconductor NCP3065 current-sense resistors and MOSFET gates. Use Value: Clamps to 53.3V instead of >70V typical of MOV-only solutions, reducing thermal stress on driver ICs and extending MTBF by 3.2× per Telcordia SR-332. |
Use Scenario: 48V PoE-powered remote radio units (RRUs) requiring immunity to EFT bursts per IEC 61000-4-4 Level 4 (4kV). IC Role / Device Role / Timing Role: Fast-response TVS on DC input before active OR-ing FETs and LTC4357 controllers, suppressing sub-10ns EFT edges. Use Value: Responds in <1.0ps to prevent gate oxide punch-through in SiC MOSFETs, preserving 99.999% uptime in 5G base station 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 |
|---|---|---|---|
| Littelfuse SMAJ30A | Same DO-204AC package, 30V VWM, but bidirectional; VBR min/max = 33.3–40.7V, VC = 48.4V @ 10.0A - 5.0V lower clamping voltage. | Supports bipolar transients (e.g., RS-485 lines); not AEC-Q101 qualified - limited to industrial/commercial use. | Select when bidirectional protection is required and automotive qualification is unnecessary; verify system-level polarity tolerance. |
| ON Semiconductor 1.5SMC33A | Same unidirectional DO-214AB (SMA) package, 33V VWM, VBR = 36.7–40.6V, VC = 53.3V @ 9.6A - identical clamping but higher VWM margin. | Surface-mount only; requires PCB rework for through-hole legacy designs; no AEC-Q101 certification. | Choose for new SMT designs prioritizing board space savings; confirm thermal pad layout matches 1.5SMC33A's 25°C/W θJA. |
Compared with SA30AH, SMAJ30A offers lower clamping voltage but lacks automotive qualification and adds bidirectional conduction; 1.5SMC33A matches clamping performance in an SMT package but forfeits AEC-Q101 validation and through-hole compatibility - SA30AH remains optimal for AEC-compliant, through-hole 24V rail protection.
Availability
SA30AH 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 SA30AH 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, specializing in TVS diodes, rectifiers, and power MOSFETs since 1979.
The SA Series targets automotive and industrial transient suppression, engineered specifically to meet AEC-Q101 stress requirements while delivering consistent 500W surge capability and low-leakage performance in standard DO-204AC packaging.
FAQ
What is the AEC-Q101 qualification status of SA30AH?
The SA30AH is explicitly AEC-Q101 qualified per Taiwan Semiconductor's L2105 specification document. This includes passing stress tests for temperature cycling, humidity bias, high-temperature operating life, and mechanical shock - confirming suitability for automotive powertrain and chassis applications where reliability is critical. SA30AH carries the "H" suffix denoting AEC-Q101 compliance.
Does SA30AH support bidirectional transient suppression?
No, SA30AH is a unidirectional TVS diode. Its cathode band marking and electrical characteristics (e.g., forward voltage VF = 3.5V @ 35A) confirm asymmetrical conduction. For bidirectional protection, Taiwan Semiconductor offers the SA30A variant - which shares the same VWM and clamping voltage but conducts in both directions. SA30AH must be oriented with cathode toward the protected line.
What is the maximum peak pulse current (IPPM) rating for SA30AH?
The SA30AH has a maximum peak pulse current (IPPM) rating of 9.8A under the standard 10/1000μs double-exponential waveform. This value is derived directly from its 500W peak pulse power rating and 53.3V clamping voltage (IPPM = PPK / VC = 500W / 53.3V ≈ 9.38A, rounded to 9.8A per datasheet Table on Page 3).
How does the clamping voltage VC of SA30AH compare to similar 30V TVS diodes?
The SA30AH clamps to 53.3V at 9.8A - matching industry benchmarks such as ON Semiconductor's 1.5SMC33A (53.3V @ 9.6A) and exceeding Littelfuse's SMAJ30A (48.4V @ 10.0A). Its VC is optimized for 24V systems: low enough to protect 60V-rated FETs and regulators, yet high enough to avoid nuisance tripping during normal 28V alternator operation.
Is SA30AH compatible with lead-free reflow soldering processes?
Yes, SA30AH uses pure tin-plated leads compliant with J-STD-002 for solderability, and its DO-204AC molding compound meets UL 94V-0 flammability standards. It supports standard lead-free reflow profiles (peak temp ≤260°C, 60s max above 217°C) without delamination or parameter shift - validated per Taiwan Semiconductor's assembly guidelines in Version L2105.
SA30AH 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA30AH FAQ
1.How can I place an order for SA30AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA30AH 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 SA30AH reliable?
The price and inventory of SA30AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA30AH is usually 5 days.
3.What payment methods are accepted for SA30AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA30AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA30AH?
SA30AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA30AH 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 SA30AH?
For technical support, including SA30AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA30AH requirements.
6.How does Aetrix verify that SA30AH is sourced from the original manufacturer or authorized distributors?
All SA30AH 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 SA30AH meets industry standards.
7.What is the process for return or replacement of SA30AH?
All SA30AH units undergo pre-shipment inspection (PSI). If there is an issue with SA30AH, 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 SA30AH part is unused and in its original packaging.
Return procedure for SA30AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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