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Vishay General Semiconductor - Diodes Division SA28AHE3/54
- Part No.:
- SA28AHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA28AHE3/54.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,101
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Product details
Overview
SA28AHE3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for overvoltage protection of sensitive electronics. It features 500 W peak pulse power (10/1000 μs), 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR at 1 mA), and clamps to ≤45.4 V at 11 A peak pulse current - deployed on power rails and I/O lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SA28AHE3/54 datasheet, SA28AHE3/54 pinout, SA28AHE3/54 application, or SA28AHE3/54 equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, DO-15 mechanical data, clamping performance curves, and direct alternatives for ESD/surge protection design-in.
Technical Context
The SA28AHE3/54 operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast response (<1 ns) to transient events such as load dump, inductive switching spikes, and ESD. Its 175 °C maximum junction temperature and 70 A IFSM rating support robust operation in under-hood automotive environments.
It complies with AEC-Q101 stress testing for automotive-grade reliability and uses matte tin-plated leads solderable per J-STD-002/JESD 22-B102. The HE3 suffix confirms AEC-Q101 qualification and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 31.1 V / 34.4 V at 1 mA - Ensures predictable avalanche initiation across production lot |
| VC @ IPPM | ≤45.4 V at 11 A - Limits downstream IC voltage stress during 10/1000 μs transients |
| PPPM | 500 W - Sustains high-energy surges without failure under 0.01% duty cycle |
| IFSM | 70 A - Withstands 10 ms half-sine surge, critical for automotive load-dump immunity |
| TJ max | +175 °C - Enables placement near heat sources in engine control modules |
| Package | DO-15 (DO-204AC) - Industry-standard axial leaded outline compatible with automated insertion |
Pinout & Package
DO-15 (DO-204AC) molded epoxy package with axial leads; cathode indicated by color band on one end. Matte tin-plated terminals meet J-STD-002 solderability and JESD 22-B102 thermal shock requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Avalanche clamping terminal | Marked with band; connected to protected line (e.g., 24 V rail or signal input) to clamp positive transients |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance and long-term leakage stability under thermal cycling |
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors |
| 500 W peak pulse power | Meets ISO 7637-2 Pulse 1, 2a, 3a/b and IEC 61000-4-5 surge immunity requirements |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD >15 kV contact discharge) |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth in high-reliability, long-life automotive deployments |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protection of 24 V supply inputs against load dump transients up to 120 V and 100 ms duration. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC/DC converter input. Use Value: Clamps peak voltage to ≤45.4 V at 11 A, preventing damage to downstream regulators and microcontrollers. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA transmitter) from inductive kickback in factory automation. IC Role / Device Role / Timing Role: Series-connected TVS on current-loop output, referenced to local ground. Use Value: Sub-1 ns response ensures clamping occurs before op-amp or ADC input stages are overstressed. |
| Telecom Power Interface | Consumer Appliance Motor Drive Board |
Use Scenario: Safeguarding PoE-powered device front-end from Ethernet cable-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input stage prior to isolation transformer. Use Value: 500 W rating handles repeated 10/1000 μs surges per IEC 61000-4-5 Level 3 without degradation. | Use Scenario: Protecting MCU GPIOs and gate drivers from back-EMF when controlling BLDC motors in HVAC systems. IC Role / Device Role / Timing Role: Localized TVS on motor driver enable and feedback lines. Use Value: 28 V VWM matches 24 V system rail; 175 °C TJ max supports operation near heatsinks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28A-E3/52 (Vishay) | Same VWM/VBR, but SMA package (surface-mount); 400 W PPPM | Requires PCB rework for SMT assembly; not drop-in for through-hole DO-15 footprint | Select when board space is constrained and automated pick-and-place is used. |
| 1.5KE27A (ON Semiconductor) | DO-201 package; 27 V VWM, 500 W PPPM, but only commercial grade (not AEC-Q101) | Lacks automotive qualification; unsuitable for under-hood deployment without additional validation | Select for cost-sensitive industrial controls where AEC-Q101 is not mandated. |
Compared with SMAJ28A-E3/52 and 1.5KE27A, the SA28AHE3/54 uniquely combines AEC-Q101 qualification, DO-15 through-hole compatibility, and full 500 W surge capability - making it optimal for automotive and high-reliability industrial replacements requiring no layout change.
Availability
SA28AHE3/54 is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor interfaces, and telecom power input stages requiring stable component supply and long-term lifecycle assurance.
Supply support for SA28AHE3/54 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade performance.
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.
FAQ
What is the clamping voltage of SA28AHE3/54 at its rated peak pulse current?
The SA28AHE3/54 has a maximum clamping voltage (VC) of 45.4 V at its rated peak pulse current (IPPM) of 11 A using a 10/1000 μs waveform. This value is measured per Figure 7 in the official Vishay datasheet (Doc. #88378) and defines the upper voltage limit imposed on protected circuitry during surge events. Maintaining VC below downstream IC absolute maximum ratings is essential for reliable protection - the SA28AHE3/54 achieves this while delivering 500 W pulse handling capacity.
Is SA28AHE3/54 qualified for automotive use?
Yes, SA28AHE3/54 is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its ordering code and explicitly stated in Vishay's datasheet revision 27-Sep-2021 (Document Number: 88378). This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its suitability for under-hood and chassis-mounted automotive applications such as engine control modules and body control units.
What does the "HE3" suffix mean in SA28AHE3/54?
The "HE3" suffix in SA28AHE3/54 indicates two key attributes: RoHS compliance and AEC-Q101 qualification. Per Vishay's ordering information, "HE3" denotes the AEC-Q101 qualified version with JESD 201 Class 2 whisker resistance, distinguishing it from the commercial-grade "E3" variant. This suffix directly maps to the device's enhanced reliability profile - critical for automotive and industrial designs requiring extended lifetime and thermal robustness.
Can SA28AHE3/54 be used in bidirectional configurations?
No, SA28AHE3/54 is a unidirectional TVS diode, as indicated by the "A" (not "CA") suffix in its part number. Bidirectional variants in the same family carry the "CA" suffix (e.g., SA28CA). Using SA28AHE3/54 for bidirectional protection would leave negative-going transients unclamped. For symmetric surge protection, select SA28CAHE3/54 or equivalent - the SA28AHE3/54 must be oriented with cathode toward the protected line to suppress positive transients only.
What is the maximum operating temperature for SA28AHE3/54?
The SA28AHE3/54 has a maximum junction temperature (TJ) of +175 °C, specified in the "Maximum Ratings" table of Vishay's datasheet (Document Number: 88378). This allows reliable operation in high-ambient environments such as engine compartments or enclosed industrial enclosures. Derating applies above 25 °C ambient per Figure 2, and the device's 175 °C rating exceeds typical automotive under-hood requirements (125–150 °C), providing thermal margin for sustained surge events.
SA28AHE3/54 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):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 11A
- 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)
SA28AHE3/54 FAQ
1.How can I place an order for SA28AHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA28AHE3/54 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 SA28AHE3/54 reliable?
The price and inventory of SA28AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA28AHE3/54 is usually 5 days.
3.What payment methods are accepted for SA28AHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA28AHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA28AHE3/54?
SA28AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA28AHE3/54 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 SA28AHE3/54?
For technical support, including SA28AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA28AHE3/54 requirements.
6.How does Aetrix verify that SA28AHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA28AHE3/54 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 SA28AHE3/54 meets industry standards.
7.What is the process for return or replacement of SA28AHE3/54?
All SA28AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA28AHE3/54, 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 SA28AHE3/54 part is unused and in its original packaging.
Return procedure for SA28AHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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