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Vishay General Semiconductor - Diodes Division SMA5J28A-E3/5A
- Part No.:
- SMA5J28A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J28A-E3/5A.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,867
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Product details
Overview
SMA5J28A-E3/5A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) 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) at 1 mA, 45.4 V clamping voltage (VC) at 11.0 A peak pulse current (IPPM), and 500 W peak pulse power (PPPM) with 10/1000 μs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMA5J28A-E3/5A datasheet, SMA5J28A-E3/5A pinout, SMA5J28A-E3/5A application, or SMA5J28A-E3/5A equivalent, key selection criteria include verified clamping performance under 10/1000 μs transients, unidirectional polarity marking, RoHS-compliant matte tin-plated leads, 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: when reverse voltage exceeds VBR, it avalanches to limit transient energy across protected nodes. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at 28 V), while thermal resistance (RθJA = 80 °C/W) supports operation up to TJ = 150 °C with appropriate PCB copper area.
The device complies with ANSI/IEEE C62.35 for surge testing and meets J-STD-020 MSL Level 1 (260 °C reflow peak). It is rated for non-repetitive 8.3 ms half-sine surge current up to 40 A (IFSM), and its bidirectional counterpart SMA5J28CA is electrically distinct - SMA5J28A-E3/5A is strictly unidirectional with cathode band marking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 24 V systems. |
| VBR (min/max) | 31.1 V / 34.4 V at 1 mA - guaranteed avalanche onset range; ensures predictable turn-on during fast transients. |
| VC @ IPPM | 45.4 V at 11.0 A - clamped voltage during 10/1000 μs surge; determines maximum stress on downstream components. |
| PPPM | 500 W - peak pulse power handling per 10/1000 μs waveform; enables robust protection against IEC 61000-4-5 Level 4 surges. |
| IFSM | 40 A - single half-sine surge rating (8.3 ms); validates survivability against inductive switch-off events. |
| Junction Temp | -55 °C to +150 °C - operational and storage range; supports under-hood automotive and industrial ambient conditions. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by black band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path) in unidirectional configuration. |
| Cathode | Reverse-biased clamping terminal | Marked with band; connected to protected line (e.g., 24 V rail or signal input) to clamp overvoltage to ground. |
Key Features
| Feature | Design Value |
|---|---|
| Low incremental surge resistance | Enables tighter clamping (VC − VBR ≈ 14.3 V), reducing voltage overshoot during fast transients. |
| Glass passivated chip junction | Ensures long-term stability of VBR and low leakage drift over temperature and lifetime. |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without baking; compatible with high-volume automated assembly. |
| AEC-Q101 qualification option | HE3/HM3 variants available for automotive applications; SMA5J28A-E3/5A is commercial-grade RoHS-compliant. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs in engine control units (ECUs) and body electronics against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between 24 V rail and chassis ground to clamp transients above 31.1 V. Use Value: Limits peak voltage to ≤45.4 V during 10/1000 μs surges, preventing damage to downstream PMICs and microcontrollers. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in PLC modules exposed to field wiring ESD and surge coupling. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to divert fast transients before reaching op-amp front-end or ADC input. Use Value: Sub-1 ns response time and 1.0 μA leakage at 28 V preserve signal integrity and minimize offset error in precision sensing. |
| Telecom DC Power Input Protection | Consumer Equipment DC Adapter Interface |
Use Scenario: Securing 24–48 V DC inputs of PoE-powered network switches and base stations against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary clamping device upstream of DC-DC converters, sized for 500 W peak dissipation. Use Value: Withstands repeated 10/1000 μs surges up to 11.0 A while maintaining VWM margin for 48 V nominal systems. |
Use Scenario: Protecting USB-C PD and barrel-jack inputs in smart home hubs and audio amplifiers from adapter fault transients and hot-plug spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and system ground to absorb 100–500 W transient energy. Use Value: Low-profile SMA package fits tight board spaces; RoHS-compliant matte tin leads ensure reliable solder joints in consumer reflow profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J28A-M3/5A | Halogen-free, RoHS-compliant variant with identical electrical specs and SMA package. | No functional difference; selected where halogen-free material compliance is mandated. | Choose SMA5J28A-M3/5A for green manufacturing requirements without design change. |
| SMA6J28A-E3/5A | 600 W PPPM rating (vs. 500 W), same VWM/VBR/VC, identical SMA package and pinout. | Higher surge margin for IEC 61000-4-5 Level 5 or repetitive surge environments. | Select SMA6J28A-E3/5A when system-level surge testing requires >500 W headroom. |
Compared with SMA5J28A-E3/5A, SMA5J28A-M3/5A offers identical protection performance with halogen-free construction, while SMA6J28A-E3/5A provides 20 % higher peak pulse power - both retain the same 28 V stand-off, clamping behavior, and layout compatibility.
Availability
SMA5J28A-E3/5A is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, telecom power supplies, and consumer DC adapter interfaces requiring stable component supply and RoHS-compliant SMT surge protection.
Supply support for SMA5J28A-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 qualification.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained SMT designs, targeting automotive, industrial, and telecom applications where robust 500 W surge handling and stable clamping are critical.
FAQ
What is the clamping voltage of SMA5J28A-E3/5A at its rated peak pulse current?
The SMA5J28A-E3/5A has a maximum clamping voltage (VC) of 45.4 V at 11.0 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The SMA5J28A-E3/5A maintains this clamping performance across its specified operating temperature range.
Is SMA5J28A-E3/5A suitable for automotive applications?
SMA5J28A-E3/5A is RoHS-compliant and qualified to J-STD-020 MSL Level 1, but it is not AEC-Q101 qualified. For automotive use, Vishay offers the SMA5J28AHE3_A variant (suffix HE3), which carries AEC-Q101 qualification. The SMA5J28A-E3/5A itself is commercial-grade and intended for industrial and telecom applications where AEC-Q101 is not mandated.
What does the "E3/5A" suffix mean in SMA5J28A-E3/5A?
The "E3" denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads; "5A" specifies the packaging format: 7500 units per 13-inch diameter plastic tape and reel. This differs from "E3/61", which uses 1800 units per 7-inch reel. Both share identical electrical and thermal specifications - only packaging and quantity differ.
How does SMA5J28A-E3/5A compare to SMA5J28CA?
SMA5J28A-E3/5A is unidirectional with cathode band marking and forward conduction capability; SMA5J28CA is bidirectional, with symmetrical clamping in both directions and no polarity marking. Their VWM, VBR, and VC values differ: SMA5J28CA has VWM = 28 V but VBR min/max = 31.1–34.4 V in both directions, and VC = 45.4 V at same IPPM. SMA5J28A-E3/5A must not be substituted for SMA5J28CA in AC-coupled or floating-line applications.
What PCB layout guidance applies to SMA5J28A-E3/5A for optimal thermal performance?
Vishay specifies that SMA5J28A-E3/5A must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated PPPM and thermal resistance (RθJA = 80 °C/W). Reducing pad size de-rates power handling significantly - e.g., smaller pads increase junction temperature rise and reduce surge survivability. Thermal vias under pads further improve heat dissipation in high-reliability designs.
SMA5J28A-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:
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J28A-E3/5A FAQ
1.How can I place an order for SMA5J28A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J28A-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 SMA5J28A-E3/5A reliable?
The price and inventory of SMA5J28A-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 SMA5J28A-E3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J28A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J28A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J28A-E3/5A?
SMA5J28A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J28A-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 SMA5J28A-E3/5A?
For technical support, including SMA5J28A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J28A-E3/5A requirements.
6.How does Aetrix verify that SMA5J28A-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J28A-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 SMA5J28A-E3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J28A-E3/5A?
All SMA5J28A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J28A-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 SMA5J28A-E3/5A part is unused and in its original packaging.
Return procedure for SMA5J28A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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