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Vishay General Semiconductor - Diodes Division SA43A-E3/54
- Part No.:
- SA43A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA43A-E3/54.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,792
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Product details
Overview
SA43A-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for circuit protection against ESD and surge transients. It features 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 1 mA, 69.4 V clamping voltage (VC) at 7.2 A peak pulse current, and 500 W peak pulse power rating with 10/1000 μs waveform.
For engineers reviewing the SA43A-E3/54 datasheet, SA43A-E3/54 pinout, SA43A-E3/54 application, or SA43A-E3/54 equivalent, this device is selected for robust overvoltage protection in DC power rails, automotive sensor interfaces, and industrial I/O lines where fast response (<1 ns), low clamping ratio, and AEC-Q101 qualification are required.
Technical Context
The SA43A-E3/54 operates as a silicon avalanche diode that enters controlled breakdown above its VBR to shunt transient energy away from protected circuitry. Its unidirectional polarity enables integration into DC-biased lines with cathode-to-rail configuration, and its glass-passivated junction ensures stable leakage performance and long-term reliability under thermal cycling.
It delivers 500 W peak pulse power handling per 10/1000 μs waveform at TA = 25 °C, with derating above 25 °C per Fig. 2, and supports 70 A non-repetitive forward surge current (IFSM) - critical for surviving load-dump events in 12 V automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse operating voltage before clamping begins; sets safe DC bias margin for protected line |
| VBR (min/max) | 47.8 V / 52.8 V at 1 mA - defines precise breakdown threshold window for predictable clamping onset |
| VC @ IPPM | 69.4 V at 7.2 A - clamping voltage during 10/1000 μs surge; determines maximum stress on downstream ICs |
| PPPM | 500 W - peak transient power it can absorb without failure; validates suitability for ISO 7637-2 Pulse 1/2a/5a |
| ID @ VWM | 1.0 μA - ultra-low reverse leakage at rated stand-off; minimizes standby power loss in battery-powered systems |
| TJ max. | +175 °C - extended junction temperature range enables under-hood automotive deployment |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: DO-15 (DO-204AC), axial-leaded, epoxy-molded case with matte tin-plated leads. Cathode identified by color band at one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-impedance return path; carries full surge current during clamping |
| Cathode | High-side connection point | Marked with color band; connected to protected line (e.g., 43 V rail); initiates avalanche conduction when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage drift over 1000+ thermal cycles (−55 °C to +175 °C) |
| 500 W peak pulse power (10/1000 μs) | Validates compliance with IEC 61000-4-5 Level 4 (4 kV) and ISO 16750-2 Load Dump (12 V system) |
| Fast response time (<1 ns) | Clamps transients before sensitive logic or analog circuitry sustains damage |
| AEC-Q101 qualified | Meets automotive stress test requirements including HTGB, AC/HTRB, and ESD (HBM ≥ 8 kV) |
| DO-15 mechanical robustness | Withstands 275 °C solder dip (10 s) and meets UL 94 V-0 flammability for safety-critical PCBs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 42 V nominal battery-fed ECUs (e.g., body control modules) from load dump and jump-start surges. IC Role / Device Role / Timing Role: Primary clamping element placed between battery rail and input filter capacitor. Use Value: Limits voltage excursion to ≤69.4 V during 7.2 A transient, preventing damage to 75 V-rated DC-DC converters and microcontrollers. | Use Scenario: Safeguarding 4–20 mA current-loop transmitters in factory automation against field-wiring induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed across loop supply terminals to clamp reverse polarity and inductive kickback. Use Value: Withstands repetitive 500 W pulses while maintaining <1.0 μA leakage at 43 V, preserving loop accuracy and calibration stability. |
| Telecom DC Power Input | Consumer Appliance Motor Drive |
Use Scenario: Securing 48 V PoE-powered equipment inputs against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage protector upstream of DC-DC converter and Ethernet PHY. Use Value: Clamps 10/1000 μs transients to 69.4 V within nanoseconds, meeting GR-1089-CORE Level 3 surge immunity requirements. | Use Scenario: Shielding MCU GPIOs and gate drivers in washing machine motor control boards from commutation spikes. IC Role / Device Role / Timing Role: Localized TVS on 43 V auxiliary supply feeding optocouplers and level shifters. Use Value: Provides 175 °C junction rating for operation near heat-generating triacs and MOSFETs, ensuring longevity in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A-E3/57 | Same VWM/VBR/VC specs but in SMA (DO-214AC) surface-mount package; lower thermal resistance (RθJA = 50 °C/W vs. 75 °C/W) | Preferred for high-density PCBs or automated SMT assembly; not suitable for through-hole or high-vibration environments | Select SMAJ43A-E3/57 when board space is constrained and reflow compatibility is required. |
| P4KE43A-E3/54 | Same DO-15 package and electrical specs but rated for 400 W PPPM (vs. 500 W); higher VC (71.4 V at 7.2 A) | Marginally lower surge capability; may require derating in ISO 7637-2 Pulse 5a scenarios | Choose P4KE43A-E3/54 only if cost sensitivity outweighs need for full 500 W headroom and tighter clamping. |
Compared with SMAJ43A-E3/57 and P4KE43A-E3/54, the SA43A-E3/54 uniquely balances 500 W surge capacity, DO-15 mechanical ruggedness, and AEC-Q101 qualification - making it optimal for automotive and industrial through-hole designs requiring proven reliability under thermal and mechanical stress.
Availability
SA43A-E3/54 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom power supplies requiring stable component supply, long-lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for SA43A-E3/54 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, and protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The SAxxA series is part of Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure applications demanding AEC-Q101 validation and consistent clamping performance.
FAQ
What is the clamping voltage of SA43A-E3/54 and how does it protect downstream components?
The SA43A-E3/54 has a maximum clamping voltage (VC) of 69.4 V at 7.2 A peak pulse current (10/1000 μs waveform). This means that during a surge event, the device limits the voltage seen by downstream components to no more than 69.4 V - well below typical 75 V or 80 V absolute maximum ratings of many DC-DC controllers and microcontrollers. Its fast <1 ns response ensures clamping occurs before transient energy damages sensitive circuitry, and its low incremental surge resistance maintains stable clamping under varying current levels.
Is SA43A-E3/54 suitable for automotive applications?
Yes, SA43A-E3/54 is AEC-Q101 qualified and explicitly rated for automotive use. It meets stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD (HBM ≥ 8 kV). Its 175 °C maximum junction temperature, 70 A IFSM rating, and 500 W peak pulse power make it appropriate for protecting 12 V and 42 V vehicle subsystems such as body control modules, lighting drivers, and sensor interfaces exposed to load dump and jump-start conditions.
What is the meaning of the "E3/54" suffix in SA43A-E3/54?
The "E3" suffix indicates RoHS-compliant, commercial-grade construction with JESD 201 Class 1A whisker resistance; "/54" denotes the preferred packaging code - 4000 units per 13-inch paper tape and reel. This packaging format supports automated pick-and-place assembly and ensures moisture-sensitive level (MSL) 1 handling without baking, simplifying manufacturing logistics for high-volume production of SA43A-E3/54.
How does SA43A-E3/54 differ from bidirectional TVS diodes like SA43CA-E3/54?
SA43A-E3/54 is unidirectional and intended for DC-biased lines where polarity is fixed (e.g., positive rail to ground), with a cathode band marking the high-side terminal. In contrast, SA43CA-E3/54 is bidirectional - symmetrical in both directions - and used in AC-coupled or floating signal lines (e.g., RS-485, CAN bus). The SA43A-E3/54 offers lower leakage (<1.0 μA at 43 V) and slightly tighter VBR tolerance than its CA counterpart, but cannot suppress negative-going transients on positive rails without additional circuitry.
Can SA43A-E3/54 be used in parallel for higher surge current handling?
No - SA43A-E3/54 should not be paralleled without external balancing resistors due to VBR mismatch (±5% tolerance across units), which causes uneven current sharing and potential thermal runaway. For higher surge capability, select a single higher-rated device (e.g., SA54A-E3/54) or verify matched-bin selection with Vishay. Parallel use voids AEC-Q101 qualification and compromises reliability in automotive or industrial deployments.
SA43A-E3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 7.2A
- 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)
SA43A-E3/54 FAQ
1.How can I place an order for SA43A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA43A-E3/54 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 SA43A-E3/54 reliable?
The price and inventory of SA43A-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA43A-E3/54 is usually 5 days.
3.What payment methods are accepted for SA43A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA43A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA43A-E3/54?
SA43A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA43A-E3/54 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 SA43A-E3/54?
For technical support, including SA43A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA43A-E3/54 requirements.
6.How does Aetrix verify that SA43A-E3/54 is sourced from the original manufacturer or authorized distributors?
All SA43A-E3/54 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 SA43A-E3/54 meets industry standards.
7.What is the process for return or replacement of SA43A-E3/54?
All SA43A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA43A-E3/54, 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 SA43A-E3/54 part is unused and in its original packaging.
Return procedure for SA43A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA43A-E3/54 Tags
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