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Vishay General Semiconductor - Diodes Division SA30A-E3/1
- Part No.:
- SA30A-E3/1
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA30A-E3/1.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,956
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Product details
Overview
SA30A-E3/1 from Vishay General Semiconductor is a uni-directional TransZORB® transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, designed for clamping inductive-switching transients and ESD events on power rails and signal lines. It features 30 V stand-off voltage (VWM), 33.3–36.8 V breakdown voltage (VBR) at 1 mA, 48.4 V maximum clamping voltage (VC) at 10 A peak pulse current, 500 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SA30A-E3/1 datasheet, SA30A-E3/1 pinout, SA30A-E3/1 application, or SA30A-E3/1 equivalent, this page delivers verified electrical parameters, polarity marking guidance, clamping behavior under surge conditions, thermal derating curves, and direct alternatives for circuit protection design in automotive power supplies and industrial sensor interfaces.
Technical Context
The SA30A-E3/1 operates as a uni-directional avalanche diode with cathode-band polarity marking, optimized for fast response (<1 ps) to transient overvoltages. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low incremental surge resistance, enabling consistent clamping performance across temperature (–55 °C to +175 °C).
It complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive load dump) immunity requirements when used with appropriate series impedance. The 3.0 W steady-state power dissipation and 70 A IFSM rating support robust operation in 12 V/24 V automotive subsystems and industrial DC power inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping threshold. |
| VBR (min/max) | 33.3 V / 36.8 V at 1 mA - Confirmed breakdown range ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | 48.4 V at 10 A (10/1000 μs) - Clamping voltage limits downstream IC stress; enables protection of 33 V-rated components. |
| PPPM | 500 W - Peak pulse power handling capacity supports single-event surges up to 10 A without failure. |
| IFSM | 70 A - Non-repetitive forward surge current rating validates compatibility with high-energy inductive kickback events. |
| TJ max | +175 °C - Maximum junction temperature allows operation in under-hood automotive environments and sealed industrial enclosures. |
| Leakage ID | 1.0 μA @ 30 V - Ultra-low reverse leakage preserves battery life in always-on systems and avoids false triggering. |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, molded epoxy case meeting UL 94 V-0 flammability rating. Matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Cathode identified by color band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point during clamping | Connected to protected line (e.g., 12 V rail); conducts during positive transients when cathode is held higher potential. |
| Cathode | Clamping reference terminal | Marked with color band; tied to ground or lower-potential reference; defines polarity-sensitive suppression direction. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Ensures stable VBR over lifetime and eliminates moisture-induced parameter drift in humid environments. |
| 500 W peak pulse power (10/1000 μs) | Supports protection against ISO 7637-2 Pulse 5a (load dump) in 12 V automotive systems without derating. |
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS sensor modules. |
| Low incremental clamping resistance | Minimizes voltage overshoot during fast-rising transients (e.g., relay coil de-energization), reducing risk of MOSFET gate oxide damage. |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker test; suitable for lead-free reflow and wave soldering processes in high-volume manufacturing. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppresses load-dump transients on 12 V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Uni-directional TVS placed between battery input and DC-DC converter input stage. Use Value: Limits clamped voltage to ≤48.4 V, preventing overvoltage damage to 40 V-rated input capacitors and controller ICs. |
Use Scenario: Shields analog front-end of pressure sensors exposed to ESD and switching noise in factory automation. IC Role / Device Role / Timing Role: Fast-response clamping device on 5 V supply line upstream of op-amp signal conditioning circuitry. Use Value: Sub-1 ns response time prevents latch-up in precision amplifiers during 8 kV contact ESD events per IEC 61000-4-2. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Guards PoE-powered network switches against induced surges on 48 V DC input derived from midspan injectors. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC bus feeding Ethernet PHY and management MCU. Use Value: Withstands repetitive 500 W pulses at 0.01 % duty cycle, enabling reliable operation in telecom infrastructure with frequent lightning-induced transients. |
Use Scenario: Protects microcontroller GPIOs and H-bridge drivers from back-EMF spikes generated by brushed DC motors in smart home appliances. IC Role / Device Role / Timing Role: Low-leakage (1.0 μA) TVS on motor driver enable line to prevent false activation during commutation noise. Use Value: 30 V VWM provides sufficient margin above 24 V nominal supply while ensuring rapid clamping before logic-level thresholds are exceeded. |
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 VWM (30 V), identical DO-214AC package, but lower PPPM (400 W) and higher VC (48.8 V at 8.3 A). | Less margin for ISO 7637-2 Pulse 5a compliance; suited for cost-sensitive consumer designs with lower surge exposure. | Select SMAJ30A only if system-level testing confirms 400 W pulse handling suffices and PCB layout allows SMD placement. |
| 1.5KE30A | Higher PPPM (1500 W), larger DO-201AD package, same VWM/VBR range, but slower response due to higher junction capacitance. | Better for high-energy lightning surges (IEC 61000-4-5), less ideal for fast ESD where sub-nanosecond response is critical. | Choose 1.5KE30A when protecting AC mains-derived DC rails or where board space permits axial-leaded through-hole mounting. |
Compared with SMAJ30A and 1.5KE30A, SA30A-E3/1 delivers optimal balance of compact DO-15 form factor, AEC-Q101 qualification, and 500 W pulse capability-making it preferred for space-constrained automotive and industrial DC power protection where reliability and standardized qualification are mandatory.
Availability
SA30A-E3/1 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power inputs requiring stable component supply and long-term lifecycle assurance.
Supply support for SA30A-E3/1 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and qualification for harsh environments.
The SAxxA series is part of Vishay's TransZORB® TVS family engineered specifically for robust, standardized transient suppression in automotive, industrial, and telecom power systems-prioritizing AEC-Q101 compliance, tight VBR tolerance, and repeatable clamping performance.
FAQ
What is the polarity configuration of SA30A-E3/1?
The SA30A-E3/1 is a uni-directional transient voltage suppressor diode with cathode indicated by a color band on the body. It conducts in forward bias during positive transients relative to its cathode terminal and blocks reverse current up to its 30 V stand-off rating. This polarity must be observed during PCB layout to ensure correct clamping direction on protected lines.
Does SA30A-E3/1 meet automotive qualification standards?
Yes, SA30A-E3/1 is AEC-Q101 qualified, confirming its suitability for automotive applications including engine control, body electronics, and ADAS subsystems. The qualification covers stress tests for temperature cycling, humidity, mechanical shock, and high-temperature operating life-ensuring reliability in under-hood and cabin environments.
What is the maximum clamping voltage of SA30A-E3/1 under surge conditions?
The SA30A-E3/1 has a maximum clamping voltage (VC) of 48.4 V at 10 A peak pulse current with a 10/1000 μs waveform. This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuitry during transient events, enabling safe interface with 40 V-rated downstream components.
Can SA30A-E3/1 be used in bi-directional protection circuits?
No, SA30A-E3/1 is strictly uni-directional. For bi-directional transient suppression, Vishay offers the SA30CA variant (with CA suffix), which provides symmetrical clamping in both polarities. Using SA30A-E3/1 in a bi-directional configuration would result in forward conduction and potential failure during negative transients.
What is the RoHS and whisker compliance status of SA30A-E3/1?
SA30A-E3/1 carries the E3 suffix, indicating full RoHS compliance and qualification to JESD 201 Class 1A whisker test. Its matte tin-plated leads are compatible with lead-free soldering processes, and the molding compound meets UL 94 V-0 flammability requirements-supporting compliance in consumer, industrial, and automotive end products.
SA30A-E3/1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 10A
- 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-E3/1 FAQ
1.How can I place an order for SA30A-E3/1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA30A-E3/1 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-E3/1 reliable?
The price and inventory of SA30A-E3/1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA30A-E3/1 is usually 5 days.
3.What payment methods are accepted for SA30A-E3/1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA30A-E3/1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA30A-E3/1?
SA30A-E3/1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA30A-E3/1 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-E3/1?
For technical support, including SA30A-E3/1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA30A-E3/1 requirements.
6.How does Aetrix verify that SA30A-E3/1 is sourced from the original manufacturer or authorized distributors?
All SA30A-E3/1 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-E3/1 meets industry standards.
7.What is the process for return or replacement of SA30A-E3/1?
All SA30A-E3/1 units undergo pre-shipment inspection (PSI). If there is an issue with SA30A-E3/1, 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-E3/1 part is unused and in its original packaging.
Return procedure for SA30A-E3/1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA30A-E3/1 Tags
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