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Vishay General Semiconductor - Diodes Division SMA5J28CAHE3_A/H
- Part No.:
- SMA5J28CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J28CAHE3_A/H.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,509
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Product details
Overview
SMA5J28CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on signal and power lines. It features a 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR), 500 W peak pulse power (10/1000 µs), clamping voltage of 45.4 V at 11.0 A IPPM, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMA5J28CAHE3_A/H datasheet, SMA5J28CAHE3_A/H pinout, SMA5J28CAHE3_A/H application, or SMA5J28CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.43), MSL Level 1 reflow compatibility, and verified performance under ISO 7637-2 and IEC 61000-4-5 surge conditions.
Technical Context
This device operates as a voltage-clamped shunt protector with symmetrical reverse/forward conduction-no polarity marking required. Its glass-passivated junction enables fast response (<1 ns), low incremental surge resistance, and stable clamping across temperature (–55 °C to +150 °C).
The SMA5J28CAHE3_A/H delivers 500 W peak pulse power per 10/1000 µs waveform when mounted on 5.0 mm × 5.0 mm copper pads, with thermal resistance RθJA = 80 °C/W and RθJL = 25 °C/W-enabling reliable operation in compact automotive and industrial PCB layouts without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 24 V nominal systems. |
| VBR (min/max) | 31.1 V / 34.4 V - Verified breakdown range at 1 mA test current; ensures consistent turn-on across production lots and temperature. |
| VC @ IPPM | 45.4 V - Clamping voltage at 11.0 A peak pulse current; limits downstream IC stress during 500 W transients. |
| PPPM | 500 W - Peak pulse power rating per 10/1000 µs waveform; supports robust protection against load dump and inductive switching events. |
| TJ max. | +150 °C - Maximum junction temperature; enables deployment in under-hood automotive environments and sealed industrial enclosures. |
| Qualification | AEC-Q101 qualified - Validated for automotive-grade reliability including HTOL, temperature cycling, and ESD testing per JEDEC standards. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Identical electrical behavior in both directions; connects across protected line and ground (or between differential lines) without orientation constraint. |
| Case (body) | Thermal and mechanical interface | Exposed metal slug provides primary thermal path to PCB copper; requires minimum 5.0 mm × 5.0 mm pad per terminal for rated PPPM. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, differential buses (e.g., CAN, RS-485), or ungrounded DC rails without polarity concerns. |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes overvoltage exposure to downstream ICs-critical for protecting 3.3 V or 5 V logic interfaces in automotive ECUs. |
| AEC-Q101 qualification (HE3 suffix) | Confirms suitability for automotive applications including engine control, body electronics, and ADAS sensor interfaces per ISO 16750-2. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without pre-baking; eliminates moisture-related popcorning risk during manufacturing. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity stress-key for 15+ year automotive service life. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply rails in engine control units (ECUs) against load dump surges up to ISO 7637-2 Pulse 5a (110 V, 400 ms). IC Role / Device Role / Timing Role: Shunt TVS diode placed between battery rail and ground, clamping transients before they reach PMICs and microcontrollers. Use Value: Limits peak voltage to ≤45.4 V during 500 W surges-preserving 36 V-rated input stages of buck converters and avoiding brownout resets. |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA current loops) and digital I/O (CAN, LIN) in factory automation sensors exposed to relay coil flyback and ESD. IC Role / Device Role / Timing Role: Bidirectional clamp across signal pair or signal-to-ground, absorbing ±15 kV contact ESD (IEC 61000-4-2) and 1 kV ring wave (IEC 61000-4-12). Use Value: Maintains signal integrity below 1% gain error during clamping-enabling sub-12-bit ADC accuracy in precision measurement modules. |
| Telecom DC Power Feeding | Consumer USB-C Port Protection |
Use Scenario: Protecting 48 V PoE (Power over Ethernet) injectors and splitters from lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Primary surge limiter on DC input side, coordinated with secondary GDT or MOV for staged energy handling. Use Value: Withstands 500 W pulses without degradation-extending mean time between failures (MTBF) beyond 100,000 hours in outdoor telecom cabinets. |
Use Scenario: Guarding USB-C VBUS and CC lines in portable chargers and docks against hot-plug transients and accidental 20 V adapter misconnection. IC Role / Device Role / Timing Role: Fast-acting bidirectional clamp on VBUS line, triggered before internal USB-PD controller shuts down. Use Value: Clamps 20 V misapplied inputs to <46 V within <1 ns-preventing gate oxide rupture in integrated USB switch FETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J28CAHM3_A/H | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated by OEM or regional environmental regulations. | Choose SMA5J28CAHM3_A/H when halogen-free bill-of-materials (BOM) is required for EU automotive programs or green procurement policies. |
| SMCJ28CAHE3_A/H | Same VWM/VBR/VC specs but in larger SMC (DO-214AB) package with 1500 W PPPM rating and lower RθJA (35 °C/W). | Used where higher surge energy handling (>500 W) or improved thermal dissipation is needed-e.g., main battery fuse box protection. | Choose SMCJ28CAHE3_A/H only if system-level surge testing exceeds 500 W or board layout allows larger footprint and enhanced copper thermal relief. |
Compared with SMA5J28CAHE3_A/H, SMA5J28CAHM3_A/H offers identical protection performance with halogen-free construction, while SMCJ28CAHE3_A/H trades compact size for 3× higher surge capacity and better thermal management-requiring careful PCB area and thermal design trade-offs.
Availability
SMA5J28CAHE3_A/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power feeding circuits, and consumer USB-C power delivery systems requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMA5J28CAHE3_A/H 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, power density, and automotive-grade qualification.
The SMA5J series is engineered specifically for high-power-density transient suppression in space-constrained automotive and industrial applications-delivering 500 W surge capability in the industry's smallest qualified DO-214AC footprint.
FAQ
What is the polarity configuration of SMA5J28CAHE3_A/H?
The SMA5J28CAHE3_A/H is a bidirectional TVS diode with symmetrical anode/cathode terminals and no polarity marking on the package. Its electrical characteristics-including VBR, VC, and IPPM-are identical in both directions, making it suitable for AC-coupled lines, differential buses, or ungrounded DC rails without orientation constraints during placement.
Does SMA5J28CAHE3_A/H meet automotive qualification requirements?
Yes, SMA5J28CAHE3_A/H carries the HE3 suffix, indicating full AEC-Q101 qualification per Vishay's certified test program. This includes stress testing for high-temperature operating life (HTOL), temperature cycling, mechanical shock, and ESD-validating its suitability for under-hood and chassis-mounted automotive electronics per ISO 16750-2.
What is the maximum clamping voltage of SMA5J28CAHE3_A/H under surge conditions?
The SMA5J28CAHE3_A/H has a maximum clamping voltage (VC) of 45.4 V at its rated peak pulse current (IPPM) of 11.0 A, measured using the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range (–55 °C to +150 °C) and defines the upper voltage limit imposed on protected circuitry during transient events.
Can SMA5J28CAHE3_A/H be used in place of a unidirectional TVS like SMA5J28AHE3_A/H?
No-SMA5J28CAHE3_A/H is strictly bidirectional and cannot replace unidirectional variants in DC-only applications requiring forward conduction blocking. Unidirectional types (e.g., SMA5J28AHE3_A/H) have a cathode band and conduct only in reverse bias; substituting the bidirectional version may cause unintended forward current paths in rectified or polarized circuits.
What PCB layout guidance applies to SMA5J28CAHE3_A/H for full 500 W rating?
To achieve the full 500 W peak pulse power rating, SMA5J28CAHE3_A/H must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in Vishay's datasheet Figure 2. Reduced pad area de-rates PPPM linearly; inadequate copper results in thermal saturation and premature failure during repeated surges.
SMA5J28CAHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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 ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J28CAHE3_A/H FAQ
1.How can I place an order for SMA5J28CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J28CAHE3_A/H 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 SMA5J28CAHE3_A/H reliable?
The price and inventory of SMA5J28CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J28CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMA5J28CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J28CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J28CAHE3_A/H?
SMA5J28CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J28CAHE3_A/H 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 SMA5J28CAHE3_A/H?
For technical support, including SMA5J28CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J28CAHE3_A/H requirements.
6.How does Aetrix verify that SMA5J28CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMA5J28CAHE3_A/H 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 SMA5J28CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMA5J28CAHE3_A/H?
All SMA5J28CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J28CAHE3_A/H, 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 SMA5J28CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMA5J28CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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