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Vishay General Semiconductor - Diodes Division SA30-E3/73
- Part No.:
- SA30-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA30-E3/73.pdf
- Description:
- TVS DIODE 30VWM 53.5VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,992
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Product details
Overview
SA30-E3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for primary overvoltage protection of DC power rails and signal lines. It features a 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 rating (10/1000 μs), and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SA30-E3/73 datasheet, SA30-E3/73 pinout, SA30-E3/73 application, or SA30-E3/73 equivalent, this device is selected for robust transient suppression in automotive body control modules, industrial PLC I/O protection, and DC power input stages where fast response (<1 ns), low clamping ratio, and high surge current tolerance are required.
Technical Context
The SA30-E3/73 operates as a unidirectional avalanche diode, conducting only in reverse bias above its breakdown threshold to shunt transient energy to ground. Its glass-passivated junction ensures stable VBR and low leakage (<1.0 μA at VWM), while its 175 °C max junction temperature supports operation in under-hood automotive environments.
It delivers 10 A peak pulse current (IPPM) with a 10/1000 μs waveform, clamping to ≤48.4 V - a 61% clamping ratio relative to VWM. The device exhibits a +0.036 %/°C temperature coefficient of VBR, enabling predictable performance across -55 °C to +175 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse working voltage before conduction begins; sets upper limit for protected circuit's normal operating voltage. |
| VBR (min/max) | 33.3 V / 36.8 V at 1 mA - Confirmed breakdown range ensures reliable triggering without premature conduction during transients. |
| VC @ IPPM | 48.4 V at 10 A - Clamping voltage limits downstream component stress during 500 W surge events. |
| PPPM | 500 W - Peak pulse power handling capability per 10/1000 μs waveform defines transient energy absorption capacity. |
| IFSM | 70 A - Non-repetitive forward surge current rating validates robustness against accidental polarity reversal or inrush events. |
| TJ max | +175 °C - Enables use in high-temperature automotive and industrial enclosures without thermal derating penalties. |
| Leakage ID | ≤1.0 μA at 30 V - Ultra-low reverse leakage preserves efficiency in battery-powered or high-impedance sensing circuits. |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, molded epoxy case meeting UL 94 V-0. Matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards. Cathode indicated by color band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse-biased reference node | Connected to protected line (e.g., 24 V rail); conducts during overvoltage to divert current to ground. |
| Cathode | Clamping output / Ground reference | Connected to system ground or low-impedance return path; establishes clamping voltage reference during transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| AEC-Q101 qualification | Validates suitability for automotive applications including engine control units and ADAS sensor interfaces. |
| 500 W peak pulse power (10/1000 μs) | Provides sufficient energy absorption for ISO 7637-2 Pulse 1, 2a, and 5a load-dump and inductive-switching transients. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD or lightning-induced surges). |
| RoHS-compliant, whisker-tested (JESD 201 Class 1A) | Supports lead-free reflow assembly and eliminates risk of tin whisker growth in long-life industrial systems. |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 24 V CAN/LIN bus power inputs from load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping device placed between fused 24 V supply and regulator input. Use Value: Limits transient voltage to ≤48.4 V, preventing damage to downstream LDOs and microcontrollers rated for 36 V absolute max. |
Use Scenario: Shielding 24 V digital input optocouplers from field-wiring induced surges in factory automation. IC Role / Device Role / Timing Role: Front-end TVS on terminal block side of input filter network. Use Value: Absorbs 500 W pulses without degradation, maintaining <1 μA leakage to preserve input logic threshold accuracy. |
| DC Power Supply Input Stage | Automotive Sensor Signal Line Protection |
Use Scenario: Safeguarding AC/DC adapter outputs against back-EMF from connected motors or solenoids. IC Role / Device Role / Timing Role: Parallel-connected TVS across output capacitor terminals. Use Value: Responds in <1 ns to clamp 100 V spikes to 48.4 V, protecting downstream buck converters and USB-PD controllers. |
Use Scenario: Protecting analog outputs (e.g., 0–5 V throttle position sensor) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at connector interface. Use Value: Maintains signal integrity with <1.0 μA leakage and no added capacitance beyond inherent junction (~100 pF), avoiding bandwidth reduction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A-E3/57 | Same VWM (30 V), identical DO-214AC package, but lower PPPM (400 W) and higher VC (49.0 V). | Less margin for high-energy transients like ISO 7637-2 Pulse 5a; suitable for cost-sensitive consumer-grade designs. | Select SMAJ30A-E3/57 only when 400 W rating suffices and board space requires SMC/SMA footprint. |
| 1.5KE30A | Higher PPPM (1500 W), larger DO-201AD package, same VWM/VBR range, but non-AEC-Q101 qualified. | Applicable in industrial power supplies requiring higher surge margin, but not validated for automotive temperature cycling or vibration. | Choose 1.5KE30A for legacy industrial designs needing >500 W headroom, accepting larger footprint and no automotive qualification. |
Compared with SMAJ30A-E3/57 and 1.5KE30A, the SA30-E3/73 uniquely balances AEC-Q101 compliance, DO-15 compactness, and 500 W capability - making it optimal for space-constrained automotive ECUs where qualification and reliability outweigh raw power rating.
Availability
SA30-E3/73 is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controller (PLC) inputs, and DC power supply protection requiring stable component supply, RoHS compliance, and AEC-Q101 validation.
Supply support for SA30-E3/73 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, precision, and automotive-grade qualification.
The SA30-E3/73 belongs to Vishay's TRANSZORB® family of TVS diodes, engineered specifically for high-reliability transient suppression in harsh environments such as automotive, industrial control, and telecommunications infrastructure.
FAQ
What is the clamping voltage of the SA30-E3/73 under a 10 A transient?
The SA30-E3/73 has a maximum clamping voltage (VC) of 48.4 V at 10 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is guaranteed per Vishay's datasheet revision 18-Sep-12 and defines the upper voltage seen by protected circuitry during standardized surge events. The SA30-E3/73 maintains this clamping performance across its full operating temperature range.
Is the SA30-E3/73 suitable for automotive applications?
Yes, the SA30-E3/73 is AEC-Q101 qualified and rated for operation from -55 °C to +175 °C, making it suitable for under-hood and cabin automotive applications. Its glass-passivated junction, RoHS compliance, and JESD 201 Class 1A whisker resistance further validate its use in automotive ECUs, body control modules, and sensor interfaces. The SA30-E3/73 meets key requirements for ISO 7637-2 transient immunity testing.
What does the "E3/73" suffix indicate in SA30-E3/73?
The "E3" suffix denotes RoHS-compliant, commercial-grade packaging with matte tin-plated leads meeting JESD 201 Class 1A whisker testing. The "/73" indicates tape-and-reel packaging in 73 mm wide carrier tape, typically used for automated SMT placement. This differs from "/54" (54 mm tape) and confirms the SA30-E3/73 is supplied in industry-standard surface-mount compatible format despite its axial DO-15 form factor.
How does the SA30-E3/73 compare to bi-directional TVS diodes like SA30CA?
The SA30-E3/73 is unidirectional and includes a cathode band for polarity identification, whereas SA30CA is bi-directional with no marking. Unidirectional operation allows the SA30-E3/73 to provide lower leakage (<1.0 μA vs. up to 2.0 μA for SA30CA) and slightly tighter VBR tolerance in DC-coupled applications. The SA30-E3/73 is preferred for protecting positive-rail DC systems, while SA30CA suits AC or dual-polarity signal lines.
What is the maximum steady-state power dissipation for the SA30-E3/73?
The SA30-E3/73 has a maximum steady-state power dissipation (PD) of 3.0 W when mounted on an infinite heatsink at lead temperature (TL) = 75 °C. Derating is required above 75 °C per the curve in Figure 5 of the datasheet. This rating applies to continuous DC or low-duty-cycle conditions - not transient suppression - and ensures thermal stability during sustained overvoltage or fault conditions. The SA30-E3/73 must be used within this limit to avoid junction overheating.
SA30-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 53.5V
- Current - Peak Pulse (10/1000µs):
- 9.3A
- 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-E3/73 FAQ
1.How can I place an order for SA30-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA30-E3/73 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-E3/73 reliable?
The price and inventory of SA30-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA30-E3/73 is usually 5 days.
3.What payment methods are accepted for SA30-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA30-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA30-E3/73?
SA30-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA30-E3/73 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-E3/73?
For technical support, including SA30-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA30-E3/73 requirements.
6.How does Aetrix verify that SA30-E3/73 is sourced from the original manufacturer or authorized distributors?
All SA30-E3/73 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-E3/73 meets industry standards.
7.What is the process for return or replacement of SA30-E3/73?
All SA30-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA30-E3/73, 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-E3/73 part is unused and in its original packaging.
Return procedure for SA30-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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