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Vishay General Semiconductor - Diodes Division SMA5J28C-E3/5A
- Part No.:
- SMA5J28C-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J28C-E3/5A.pdf
- Description:
- TVS DIODE 28VWM 50VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,947
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Product details
Overview
SMA5J28C-E3/5A from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping voltage transients on signal and power lines. It features a 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR), 45.4 V maximum clamping voltage (VC) at 11.0 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - used to protect automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the SMA5J28C-E3/5A datasheet, SMA5J28C-E3/5A pinout, SMA5J28C-E3/5A application, or SMA5J28C-E3/5A equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bi-directional TVS diode operates symmetrically in both polarities, with electrical characteristics defined identically for positive and negative voltage transients. Its glass-passivated junction ensures stable breakdown behavior, while low incremental surge resistance enables effective energy diversion during ESD or inductive switching events.
The device is rated for continuous operation from –55 °C to +150 °C junction temperature and meets J-STD-020 MSL Level 1 with 260 °C reflow peak. It is qualified to AEC-Q101 for automotive applications and exhibits <1.0 µA reverse leakage at 28 V stand-off voltage.
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 - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 45.4 V - Clamped voltage seen by protected circuit when subjected to 11.0 A 10/1000 µs surge |
| PPPM | 500 W - Peak transient power it can absorb without failure under standardized surge waveform |
| IPPM | 11.0 A - Maximum non-repetitive surge current it safely clamps at VC = 45.4 V |
| TJ max | +150 °C - Maximum allowable junction temperature for reliable long-term operation |
| Leakage @ VWM | <1.0 µA - Minimal parasitic loading on signal/power line at normal operating voltage |
Pinout & Package
DO-214AC (SMA) surface-mount package: molded epoxy case with matte tin-plated leads, UL 94 V-0 rated, dimensions 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), no polarity marking for bi-directional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional transient conduction path | No functional distinction between terminals; conducts equally in either direction above VBR |
| Case (body) | Non-electrical mechanical interface | Thermally coupled to PCB copper pad; contributes to thermal dissipation via RθJA = 80 °C/W |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Validated reliability for automotive under-hood and chassis-mounted electronics per stress test requirements |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profile up to 260 °C peak without baking |
| Glass-passivated junction | Improves long-term stability of VBR and reduces parameter drift under thermal cycling |
| Low-profile DO-214AC package | Supports high-density PCB layouts and compatibility with automated pick-and-place equipment |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed across differential or single-ended signal lines upstream of receiver ICs. Use Value: Limits transient excursions to ≤45.4 V, preventing damage to 3.3 V or 5 V interface logic while maintaining signal integrity. | Use Scenario: Safeguarding PLC digital input modules against inductive kickback from solenoids, relays, and motor drivers. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on 24 V DC input lines, shunting surge energy to ground. Use Value: Withstands 500 W surges and clamps at 45.4 V, enabling robust operation in factory automation environments with frequent switching noise. |
| Telecom Line Interface | Consumer Power Supply Input |
Use Scenario: Protecting Ethernet PHY front-end circuits and PoE injectors from lightning-induced surges on twisted-pair lines. IC Role / Device Role / Timing Role: Bi-directional TVS placed across each data pair (e.g., TX+/TX−) to suppress common-mode transients. Use Value: Symmetric clamping ensures equal protection regardless of surge polarity, critical for full-duplex communication links. | Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters and USB-C PD power bricks. IC Role / Device Role / Timing Role: Clamp placed across output capacitor to limit transient overshoot during load step or regulation fault. Use Value: Fast response time and low clamping voltage prevent downstream regulator latch-up or capacitor overvoltage failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J28CA-E3/5A | Identical electrical specs and packaging; CA suffix explicitly denotes bi-directional version per Vishay naming convention | No functional difference - SMA5J28C-E3/5A and SMA5J28CA-E3/5A refer to same device; CA is canonical designation | Select SMA5J28CA-E3/5A when strict adherence to Vishay's official part numbering is required for BOM compliance |
| SMCJ28CA | Same VWM/VC ratings but in larger DO-214AB (SMC) package; higher IPPM (23.3 A) and PPPM (1500 W) | Better suited for higher-energy transients; requires larger PCB footprint and different thermal pad layout | Choose SMCJ28CA only if system-level surge testing exceeds 500 W; otherwise SMA5J28C-E3/5A offers optimal size-power balance |
Compared with SMA5J28CA-E3/5A (identical function) and SMCJ28CA (higher-power alternative), the SMA5J28C-E3/5A delivers certified AEC-Q101 bi-directional clamping in the smallest standard surface-mount TVS package suitable for space-constrained automotive and industrial PCBs.
Availability
SMA5J28C-E3/5A is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and telecom line surge suppression requiring stable component supply across production lifecycles.
Supply support for SMA5J28C-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, 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, thermally demanding environments - targeting automotive, industrial, and telecom applications where AEC-Q101 compliance and fast clamping response are mandatory.
FAQ
What does the "C" suffix in SMA5J28C-E3/5A indicate?
The "C" suffix in SMA5J28C-E3/5A explicitly identifies the device as a bi-directional transient voltage suppressor. Per Vishay's naming convention, "C" denotes symmetrical clamping behavior - meaning the SMA5J28C-E3/5A provides identical breakdown and clamping characteristics in both forward and reverse directions, essential for protecting AC-coupled or floating signal paths without polarity constraints.
Is SMA5J28C-E3/5A RoHS compliant and lead-free?
Yes, SMA5J28C-E3/5A is RoHS compliant and lead-free. The "E3" suffix confirms compliance with Directive 2011/65/EU, and the matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability standards. It also passes JESD 201 Class 1A whisker testing, ensuring long-term interconnect reliability in commercial and automotive applications.
What is the maximum clamping voltage of SMA5J28C-E3/5A under surge conditions?
The maximum clamping voltage (VC) of SMA5J28C-E3/5A is 45.4 V, measured at its peak pulse current (IPPM) of 11.0 A using the standardized 10/1000 µs waveform. This value represents the highest voltage the protected circuit will experience during a transient event, making it suitable for safeguarding 3.3 V, 5 V, and 24 V systems where overvoltage must be tightly bounded.
Does SMA5J28C-E3/5A require a heatsink for standard operation?
No, SMA5J28C-E3/5A does not require an external heatsink under typical transient conditions. Its thermal resistance (RθJA) is specified at 80 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. For repetitive surge duty cycles or elevated ambient temperatures, thermal performance should be verified using Vishay's derating curves (Fig. 2), but single-event clamping relies on inherent package dissipation.
How does SMA5J28C-E3/5A differ from uni-directional versions like SMA5J28A-E3/5A?
SMA5J28C-E3/5A is bi-directional with symmetrical VBR and VC in both polarities, while SMA5J28A-E3/5A is uni-directional - featuring a cathode band marking and conducting only in reverse bias. The uni-directional version has a forward voltage drop (~3.5 V at 25 A) and is unsuitable for AC signals; SMA5J28C-E3/5A eliminates polarity concerns and supports balanced line protection without additional circuitry.
SMA5J28C-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:
- -
- Bidirectional Channels:
- 1
- 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)
SMA5J28C-E3/5A FAQ
1.How can I place an order for SMA5J28C-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J28C-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 SMA5J28C-E3/5A reliable?
The price and inventory of SMA5J28C-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 SMA5J28C-E3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J28C-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J28C-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J28C-E3/5A?
SMA5J28C-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J28C-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 SMA5J28C-E3/5A?
For technical support, including SMA5J28C-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J28C-E3/5A requirements.
6.How does Aetrix verify that SMA5J28C-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J28C-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 SMA5J28C-E3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J28C-E3/5A?
All SMA5J28C-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J28C-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 SMA5J28C-E3/5A part is unused and in its original packaging.
Return procedure for SMA5J28C-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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