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Vishay General Semiconductor - Diodes Division SA43AHE3/54
- Part No.:
- SA43AHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA43AHE3/54.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,249
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Product details
Overview
SA43AHE3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for robust overvoltage protection of sensitive electronics. It features a 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 - deployed in automotive power line and industrial sensor interface protection.
For engineers reviewing the SA43AHE3/54 datasheet, SA43AHE3/54 pinout, SA43AHE3/54 application, or SA43AHE3/54 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, DO-15 mechanical data, clamping performance under surge conditions, and direct alternatives for ESD/surge-hardened designs requiring stable unidirectional TVS response.
Technical Context
The SA43AHE3/54 operates as a silicon avalanche diode with glass-passivated junction, optimized for fast transient suppression (<1 ns response time). Its unidirectional polarity uses a cathode band marking, and it complies with AEC-Q101 for automotive-grade reliability. Thermal derating begins above 25 °C ambient, with maximum junction temperature rated at +175 °C.
It delivers 500 W peak pulse power per 10/1000 µs waveform at TA = 25 °C, with 3.0 W steady-state power dissipation on infinite heatsink at TL = 75 °C. The device exhibits low incremental surge resistance and excellent clamping ratio (VC/VBR ≈ 1.37), critical for protecting downstream MOSFETs and ICs from inductive switching transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe signal line operating margin. |
| VBR (min/max) | 47.8 V / 52.8 V at IT = 1 mA - Confirmed avalanche breakdown range; ensures predictable turn-on across production lot. |
| VC @ IPPM | 69.4 V at 7.2 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on protected circuitry. |
| PPPM | 500 W - Peak pulse power handling capability; supports repetitive surge events at 0.01 % duty cycle. |
| IFSM | 70 A - Non-repetitive forward surge current rating (10 ms half-sine); validates robustness against load dump events. |
| TJ max. | +175 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| Package | DO-15 (DO-204AC) - Industry-standard axial leaded package with RoHS-compliant matte tin plating and UL 94 V-0 molding compound. |
Pinout & Package
DO-15 (DO-204AC) package: axial-leaded, molded epoxy body, 0.130–0.138 inch diameter, 1.0 inch minimum lead length. Cathode identified by color band on one end; anode is unmarked lead.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded lead) | Forward current entry / surge return path | Connected to ground or low-impedance return in unidirectional clamp configuration; carries full surge current during clamping. |
| Cathode (banded lead) | Reverse-biased clamping node | Connected to protected line (e.g., 48 V rail or sensor input); avalanche conduction occurs when line voltage exceeds VWM. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, low-leakage avalanche behavior and long-term reliability under thermal cycling and humidity stress. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| 500 W peak pulse power (10/1000 µs) | Withstands high-energy transients from inductive load switching (e.g., solenoids, motors) without degradation. |
| Low clamping voltage ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage overshoot during clamping, reducing risk of damage to downstream logic-level ICs. |
| Matte tin-plated leads | Ensures solderability per J-STD-002 and JESD 22-B102; HE3 suffix meets JESD 201 Class 2 whisker resistance. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs from load dump and jump-start surges up to ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp transients before they reach DC-DC converters or microcontrollers. Use Value: Withstands 70 A single-pulse surge and maintains VC ≤ 69.4 V, preserving system uptime and preventing latch-up in 3.3 V/5 V logic domains. | Use Scenario: Shielding analog inputs of pressure/temperature sensors in PLC modules from EFT and lightning-induced surges on 24 V field wiring. IC Role / Device Role / Timing Role: Front-end transient suppressor on signal lines entering isolated ADC front-ends or op-amp conditioning stages. Use Value: Fast <1 ns response and low leakage (<1 µA at 43 V) prevent signal distortion while ensuring immunity to ±1 kV EFT bursts per IEC 61000-4-4. |
| Telecom Power Feeds | Consumer Appliance Motor Control |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) from induced surges on 48 V DC feed lines due to nearby AC mains coupling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on midspan injector output, coordinated with secondary TVS and common-mode chokes. Use Value: 500 W pulse rating and DO-15 mechanical robustness support repeated surge events in outdoor deployments without parameter drift. | Use Scenario: Protecting gate drivers and MCU I/O in washing machine motor inverters from commutation spikes generated by BLDC motor back-EMF. IC Role / Device Role / Timing Role: Rail-to-ground TVS on 12 V logic supply and high-side gate drive lines to suppress >100 V spikes. Use Value: AEC-Q101 qualification and 175 °C TJ max ensure sustained operation in thermally constrained appliance 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-E3/52 | Same VWM (43 V), identical VBR and VC, but in SMA (DO-214AC) surface-mount package; lower IFSM (40 A vs. 70 A). | Preferred for space-constrained PCBs; unsuitable for high-current load dump where leaded DO-15 mechanical robustness is required. | Select SMAJ43A-E3/52 only when board area is limited and surge currents remain below 40 A. |
| 1.5KE43A | Same VWM/VBR specs and DO-204AL (DO-41) package; higher PPPM (1500 W), but larger footprint and no AEC-Q101 qualification. | Used in industrial power supplies where automotive qualification is unnecessary and higher energy absorption is prioritized. | Choose 1.5KE43A for non-automotive systems needing >500 W surge capacity and legacy through-hole compatibility. |
Compared with SMAJ43A-E3/52 and 1.5KE43A, the SA43AHE3/54 uniquely combines AEC-Q101 qualification, 70 A IFSM, and DO-15 mechanical stability - making it the preferred choice for automotive and harsh-environment industrial designs where reliability under thermal and mechanical stress is non-negotiable.
Availability
SA43AHE3/54 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom power feed surge suppression requiring stable component supply across extended production lifecycles.
Supply support for SA43AHE3/54 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, MOSFETs, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SAxxA series is part of Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure - balancing clamping precision, surge endurance, and qualification-grade consistency.
FAQ
What is the clamping voltage of the SA43AHE3/54 under a 10/1000 µs surge?
The SA43AHE3/54 has a maximum clamping voltage (VC) of 69.4 V at 7.2 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per Figure 7 in the Vishay datasheet 88378 and reflects the actual voltage seen by protected circuitry during worst-case transient events - critical for validating margin against downstream IC absolute maximum ratings.
Is the SA43AHE3/54 qualified for automotive use?
Yes, the SA43AHE3/54 is AEC-Q101 qualified, as confirmed in the "Notes" section of the Vishay datasheet (Document Number 88378, Revision 27-Sep-2021). The HE3 suffix explicitly denotes AEC-Q101 qualification, and the device meets stress test requirements for temperature cycling, humidity, and surge robustness required in automotive powertrain and body electronics applications.
What does the 'HE3/54' suffix mean in SA43AHE3/54?
The 'HE3' suffix indicates RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance; '/54' specifies the preferred package code for 13-inch paper tape and reel packaging with 4000 units per reel. This ordering format aligns with Vishay's standardized delivery mode for high-volume automotive and industrial procurement of the SA43AHE3/54.
Can the SA43AHE3/54 be used in bidirectional protection circuits?
No - the SA43AHE3/54 is a unidirectional TVS diode, as indicated by the 'A' (not 'CA') suffix and the presence of a cathode band. Bidirectional variants (e.g., SA43CA) are available for AC-coupled or symmetrical surge protection; using SA43AHE3/54 in bidirectional configurations risks forward conduction and failure during negative transients.
What is the maximum operating temperature for the SA43AHE3/54?
The SA43AHE3/54 has a maximum junction temperature (TJ) of +175 °C, as specified in the "Maximum Ratings" table of the Vishay datasheet. This allows reliable operation in under-hood automotive environments and high-ambient industrial settings, provided PCB layout provides adequate thermal relief and power dissipation remains within the 3.0 W steady-state limit at TL = 75 °C.
SA43AHE3/54 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:
- -
- 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)
SA43AHE3/54 FAQ
1.How can I place an order for SA43AHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA43AHE3/54 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 SA43AHE3/54 reliable?
The price and inventory of SA43AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA43AHE3/54 is usually 5 days.
3.What payment methods are accepted for SA43AHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA43AHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA43AHE3/54?
SA43AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA43AHE3/54 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 SA43AHE3/54?
For technical support, including SA43AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA43AHE3/54 requirements.
6.How does Aetrix verify that SA43AHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA43AHE3/54 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 SA43AHE3/54 meets industry standards.
7.What is the process for return or replacement of SA43AHE3/54?
All SA43AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA43AHE3/54, 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 SA43AHE3/54 part is unused and in its original packaging.
Return procedure for SA43AHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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