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Vishay General Semiconductor - Diodes Division SMA5J28-E3/5A
- Part No.:
- SMA5J28-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J28-E3/5A.pdf
- Description:
- TVS DIODE 28VWM 50VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,026
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Product details
Overview
SMA5J28-E3/5A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for high-energy surge protection on DC power rails and signal lines. It features a 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR), 45.4 V clamping voltage (VC) at 11.0 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, microcontrollers, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the SMA5J28-E3/5A datasheet, SMA5J28-E3/5A pinout, SMA5J28-E3/5A application, or SMA5J28-E3/5A equivalent, key selection criteria include unidirectional polarity, 150 °C max junction temperature, AEC-Q101 qualification status, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (<1.0 µA leakage at 28 V), then rapidly avalanches when transient voltage exceeds VBR, limiting downstream voltage to ≤45.4 V. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance.
Designed for single-polarity DC systems, SMA5J28-E3/5A supports 40 A non-repetitive forward surge current (8.3 ms half-sine), exhibits 80 °C/W junction-to-ambient thermal resistance, and meets MSL Level 1 reflow profile (peak 260 °C), making it suitable for high-reliability surface-mount assembly without derating concerns below 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin for 24 V systems. |
| VBR min/max | 31.1 V / 34.4 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above system overvoltage thresholds. |
| VC @ IPPM | 45.4 V at 11.0 A - Clamped voltage during 500 W transient; determines maximum stress on protected ICs. |
| PPPM | 500 W - Peak pulse power handling per 10/1000 µs waveform; enables robust protection against IEC 61000-4-5 Level 4 surges. |
| TJ max | 150 °C - Maximum junction temperature; allows operation in under-hood automotive environments with proper PCB thermal design. |
| Package | DO-214AC (SMA) - Standardized surface-mount outline with cathode band marking; compatible with JEDEC J-STD-020 reflow profiles. |
| Qualification | AEC-Q101 qualified - Validated for automotive-grade reliability including temperature cycling, humidity bias, and HTRB testing. |
Pinout & Package
DO-214AC (SMA) package: molded epoxy case with matte tin-plated leads, cathode indicated by a band on one end. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of protected circuit (e.g., ground or return path); forms shunt path during transients. |
| Cathode (banded end) | Reverse-biased terminal | Connected to higher-potential line (e.g., 24 V rail); avalanche conduction occurs when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile DO-214AC package | Enables compact layout in space-constrained automotive ECUs and industrial controllers without sacrificing surge rating. |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| MSL Level 1 moisture sensitivity | Eliminates bake requirements prior to reflow; supports standard SMT line integration without process modification. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body electronics, and ADAS modules requiring zero-failure field performance. |
| RoHS-compliant matte tin plating | Guarantees solderability per J-STD-002 and whisker resistance per JESD 201 Class 1A - critical for high-volume manufacturing. |
Applications
| Automotive Power Supply Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 24 V CAN bus power rails and microcontroller supply inputs from load-dump transients and inductive switching spikes in engine control units. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VBAT and GND to clamp surges up to ±500 W without affecting normal operation. Use Value: Limits peak voltage to 45.4 V during 12 V/24 V load dump events, preventing latch-up or permanent damage to 3.3 V/5 V logic ICs downstream. |
Use Scenario: Safeguarding digital input channels of programmable logic controllers exposed to 24 V DC field wiring in factory automation environments. IC Role / Device Role / Timing Role: Front-end transient suppressor on optocoupler input side, absorbing ESD and relay-coil flyback energy before signal conditioning stages. Use Value: Withstands repeated 1 kV/500 A surge pulses per IEC 61000-4-5 while maintaining <1.0 µA leakage at 28 V standby, preserving input accuracy. |
| DC Motor Drive Gate Protection | Telecom Power Interface |
Use Scenario: Shielding high-side N-channel MOSFET gate drivers in brushed DC motor controllers from back-EMF-induced voltage spikes during commutation. IC Role / Device Role / Timing Role: Fast-response clamping device across gate-source terminals to prevent VGS overstress beyond ±20 V absolute maximum ratings. Use Value: Sub-1 ns response time limits gate voltage excursion to ≤45.4 V, avoiding unintended turn-on or oxide breakdown during 100 ns–1 µs transients. |
Use Scenario: Protecting primary-side DC-DC converter inputs in telecom base station power modules subjected to lightning-induced surges on -48 V distribution buses. IC Role / Device Role / Timing Role: Primary-stage unidirectional TVS on rectified -48 V output, absorbing differential-mode surges before bulk capacitance. Use Value: 500 W rating sustains multiple 10/1000 µs surges up to 1000 V without degradation, verified per AEC-Q101 high-temp life testing at 150 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ28A | Same DO-214AC package, identical VWM = 28 V and PPPM = 400 W (lower than SMA5J28-E3/5A's 500 W); VC = 45.7 V at 9.5 A. | Rated for lower peak power; suitable where IEC 61000-4-5 Level 3 compliance suffices but not Level 4. | Select SMA5J28-E3/5A when full 500 W surge margin is required for harsh automotive or industrial environments. |
| ON Semiconductor 1.5SMC28A | DO-214AB (SMC) package - larger footprint (7.1 mm × 6.2 mm vs. 4.9 mm × 3.9 mm); same VWM = 28 V, PPPM = 1500 W, VC = 43.0 V at 34.9 A. | Requires PCB redesign due to larger pad layout; suited for higher-power applications where space permits. | Choose SMA5J28-E3/5A for space-constrained designs needing AEC-Q101 qualification and DO-214AC compatibility without layout change. |
Compared with SMAJ28A and 1.5SMC28A, SMA5J28-E3/5A delivers optimal balance of 500 W surge capability, AEC-Q101 validation, and minimal DO-214AC footprint - enabling drop-in replacement in existing 24 V automotive and industrial layouts without compromising reliability or thermal performance.
Availability
SMA5J28-E3/5A is available at Aetrix Electronics and suitable for automotive power supply protection, industrial PLC input circuits, and DC motor drive gate protection requiring stable component supply, traceable sourcing, and lifecycle continuity assurance.
Supply support for SMA5J28-E3/5A 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
SMA5J28-E3/5A belongs to Vishay's TRANSZORB® high-power TVS family, engineered specifically for automotive-grade transient suppression in 12 V/24 V systems where AEC-Q101 compliance and consistent clamping performance are mandatory.
FAQ
What is the maximum clamping voltage of the SMA5J28-E3/5A under rated surge conditions?
The SMA5J28-E3/5A clamps to a maximum of 45.4 V when subjected to its rated 11.0 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per standard test conditions defined in ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 24-Oct-12, ensuring predictable voltage limiting for downstream IC protection in 24 V systems.
Is the SMA5J28-E3/5A suitable for automotive applications?
Yes, the SMA5J28-E3/5A is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its 150 °C maximum junction temperature, MSL Level 1 reflow compatibility, and glass-passivated junction meet stringent automotive reliability requirements - confirmed in Vishay's official documentation for the SMA5J28-E3/5A device.
What does the "E3/5A" suffix indicate in SMA5J28-E3/5A?
The "E3" denotes RoHS-compliant, commercial-grade construction with matte tin plating meeting JESD 201 Class 1A whisker resistance. The "/5A" specifies packaging in 13-inch diameter plastic tape and reel containing 7500 units - a standard logistics configuration for high-volume SMT assembly lines handling the SMA5J28-E3/5A.
How does the SMA5J28-E3/5A differ from bi-directional variants like SMA5J28CA?
The SMA5J28-E3/5A is unidirectional, with polarity marked by a cathode band and intended for DC line protection where reverse voltage is blocked. In contrast, SMA5J28CA is bi-directional, has no polarity marking, and protects AC or dual-polarity signals - a functional distinction confirmed in Vishay's ordering table and electrical characteristics section for the SMA5J28-E3/5A family.
What is the thermal resistance specification for the SMA5J28-E3/5A?
The SMA5J28-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value is specified in the Thermal Characteristics table of the Vishay datasheet and directly impacts power derating above 25 °C ambient - critical for thermal design of the SMA5J28-E3/5A in enclosed enclosures.
SMA5J28-E3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 50V
- Current - Peak Pulse (10/1000µs):
- 10A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J28-E3/5A FAQ
1.How can I place an order for SMA5J28-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J28-E3/5A 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 SMA5J28-E3/5A reliable?
The price and inventory of SMA5J28-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J28-E3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J28-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J28-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J28-E3/5A?
SMA5J28-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J28-E3/5A 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 SMA5J28-E3/5A?
For technical support, including SMA5J28-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J28-E3/5A requirements.
6.How does Aetrix verify that SMA5J28-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J28-E3/5A 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 SMA5J28-E3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J28-E3/5A?
All SMA5J28-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J28-E3/5A, 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 SMA5J28-E3/5A part is unused and in its original packaging.
Return procedure for SMA5J28-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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