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Taiwan Semiconductor Corporation SA33A A0G
- Part No.:
- SA33A A0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA33A A0G.pdf
- Description:
- TVS DIODE 33VWM 71.4VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,168
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Product details
Overview
SA33A A0G from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 500W peak pulse power at 10/1000μs, with 33V working stand-off voltage (VWM), 36.7–40.6V breakdown voltage (VBR), and 71.4V clamping voltage (VC) at 9.8A peak pulse current - used to protect automotive power rails and industrial I/O interfaces against ESD and load dump transients.
For engineers reviewing the SA33A A0G datasheet, SA33A A0G pinout, SA33A A0G application, or SA33A A0G equivalent, this page delivers verified electrical parameters, DO-15 terminal polarity mapping, real-world clamping performance data, and validated alternative parts for circuit protection design-in and BOM optimization.
Technical Context
The SA33A A0G operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (36.7–40.6V @ 1mA), clamping transients to ≤71.4V at 9.8A. Its low leakage (<1μA @ 33V) ensures minimal standby power loss in always-on systems.
Designed for single-polarity surge suppression, it features fast response (<1.0ps from 0V to VBR), meets AEC-Q101 stress requirements (when marked "H"), and uses pure tin-plated leads compliant with J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 36.7 V / 40.6 V @ 1 mA - guaranteed avalanche initiation window under standard test conditions |
| VC @ IPPM | 71.4 V @ 9.8 A - clamped voltage during 10/1000μs surge, defining worst-case rail overvoltage seen by protected IC |
| PPK | 500 W - peak transient energy handling capacity per single non-repetitive event |
| IR @ VWM | <1 μA - negligible leakage current at rated stand-off voltage, critical for battery-powered sensor nodes |
| TJ max | +175 °C - extended junction temperature rating enabling under-hood automotive deployment |
| Package | DO-204AC (DO-15) - industry-standard axial leaded package with cathode band marking and 0.400g mass |
Pinout & Package
DO-204AC (DO-15) package with axial leads: Cathode indicated by molded band; Anode and Cathode terminals are non-polarized in layout but functionally asymmetric - Cathode connects to protected circuit's higher-potential rail (e.g., +12V), Anode to ground reference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected supply rail; conducts surge current to ground when Vreverse > VBR |
| Anode (unmarked end) | Reference return path | Connected to system ground plane; completes clamping loop with minimal inductance path |
Key Features
| Feature | Design Value |
|---|---|
| 500W peak pulse rating | Supports ISO 7637-2 Pulse 1/2a/5a compliance for 12V automotive systems without derating |
| <1.0ps response time | Clamps ESD events (IEC 61000-4-2) before sensitive logic inputs reach damage threshold |
| RoHS & halogen-free | Meets IPC/JEDEC J-STD-609 Class 1 moisture sensitivity and EU ELV Directive requirements |
| 175°C max junction temp | Enables placement near high-temperature components (e.g., power MOSFET heatsinks) without thermal shutdown |
| DO-15 mechanical robustness | Withstands 10g vibration (MIL-STD-202G Method 213) and 500g shock (Method 214) in engine control modules |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting 12V battery-supplied ECUs from load dump transients up to 35V sustained for 400ms. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input stage to clamp overshoot before regulator overvoltage lockout. Use Value: Limits peak rail voltage to 71.4V during 500W surge, preventing permanent damage to buck converter MOSFETs and gate drivers. | Use Scenario: Shielding 24V digital input channels on programmable logic controllers from field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS installed at connector interface to shunt fast transients before signal conditioning op-amps. Use Value: Sub-1μA leakage avoids false triggering of optocoupler inputs; 71.4V clamping preserves 30V-rated input protection diodes. |
| LED Driver Overvoltage Suppression | ESD-Sensitive Sensor Interface Protection |
Use Scenario: Safeguarding constant-current LED drivers in streetlight systems exposed to lightning-induced line surges. IC Role / Device Role / Timing Role: TVS mounted across driver output terminals to absorb inductive kickback from long cable runs. Use Value: 500W rating handles 10/1000μs waveform energy from nearby strikes; DO-15 package allows through-hole mounting on high-current traces. | Use Scenario: Protecting I²C lines of automotive ambient light sensors from human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at sensor connector to divert 8kV contact discharge before bus transceivers. Use Value: <1.0ps response ensures clamping initiates before 15ns HBM rise time breaches 3.3V logic thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A | Same VWM (33V), lower PPK (400W), SMA package (surface-mount) | Requires PCB re-layout; unsuitable for through-hole legacy designs or high-vibration environments | Select when space-constrained layouts demand SMT and surge energy stays below 400W |
| P6SMB33A | Identical VWM/VBR/VC specs, same DO-204AC package, 600W PPK rating | Higher surge margin enables use in 24V commercial vehicle systems with larger inductive loads | Choose for enhanced reliability headroom where 500W is marginal and board space allows same footprint |
Compared with SA33A A0G, SMAJ33A offers surface-mount compatibility at reduced surge capacity, while P6SMB33A provides identical form factor with 20% higher peak power - making it preferable for heavy-duty industrial controls where transient energy exceeds 500W.
Availability
SA33A A0G is available at Aetrix Electronics and suitable for automotive body control modules, industrial programmable logic controllers, LED lighting drivers, and sensor interface circuits requiring stable component supply across multi-year production cycles.
Supply support for SA33A A0G 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 power management, protection, and signal conditioning devices since 1979.
The SA Series TVS diodes are engineered specifically for automotive-grade transient immunity and industrial equipment robustness, targeting ISO 7637-2 and IEC 61000-4-5 compliance in harsh electromagnetic environments.
FAQ
What is the maximum clamping voltage of SA33A A0G under standard 10/1000μs surge conditions?
The SA33A A0G has a maximum clamping voltage (VC) of 71.4 V when subjected to its rated peak pulse current of 9.8 A using the 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SA33A A0G suitable for bidirectional transient suppression?
No, SA33A A0G is a unidirectional TVS diode and must not be used for bidirectional protection. Its electrical characteristics - including breakdown voltage and clamping behavior - apply only in reverse-bias mode. For bipolar applications, TSC specifies CA-suffix parts (e.g., SA33CA); using SA33A A0G in AC-coupled or dual-rail systems risks failure due to forward conduction during positive half-cycles.
Does SA33A A0G meet AEC-Q101 qualification?
The SA33A A0G part number itself does not include the "H" suffix required for AEC-Q101 qualification per TSC's ordering code table. Only variants marked "SA33AH" or "SA33AHA0G" are AEC-Q101 qualified. SA33A A0G is intended for industrial and commercial applications where automotive stress testing is not mandated.
What is the reverse leakage current specification for SA33A A0G at its working voltage?
SA33A A0G exhibits a maximum reverse leakage current (IR) of 1 μA when biased at its full working stand-off voltage of 33 V. This ultra-low leakage supports energy-sensitive applications such as battery-backed sensors and always-on monitoring circuits where quiescent current budget is tightly constrained.
How is polarity identified on the SA33A A0G DO-15 package?
Polarity on the SA33A A0G is marked by a molded cathode band located near one lead end of the DO-204AC (DO-15) package. The banded end is the Cathode and must be connected to the higher-potential side of the protected circuit (e.g., +12V rail); the unmarked lead is the Anode and connects to ground. Incorrect orientation prevents proper clamping operation.
SA33A A0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- SA
- Packaging:
- Tape & Box (TB)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 71.4V
- 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)
SA33A A0G FAQ
1.How can I place an order for SA33A A0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SA33A A0G 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 SA33A A0G reliable?
The price and inventory of SA33A A0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA33A A0G is usually 5 days.
3.What payment methods are accepted for SA33A A0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA33A A0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA33A A0G?
SA33A A0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA33A A0G 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 SA33A A0G?
For technical support, including SA33A A0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA33A A0G requirements.
6.How does Aetrix verify that SA33A A0G is sourced from the original manufacturer or authorized distributors?
All SA33A A0G 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 SA33A A0G meets industry standards.
7.What is the process for return or replacement of SA33A A0G?
All SA33A A0G units undergo pre-shipment inspection (PSI). If there is an issue with SA33A A0G, 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 SA33A A0G part is unused and in its original packaging.
Return procedure for SA33A A0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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