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Vishay General Semiconductor - Diodes Division SMA5J28-E3/61
- Part No.:
- SMA5J28-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J28-E3/61.pdf
- Description:
- TVS DIODE 28VWM 50VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,215
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Product details
Overview
SMA5J28-E3/61 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 in automotive power supply input stages and industrial sensor interface protection.
For engineers reviewing the SMA5J28-E3/61 datasheet, SMA5J28-E3/61 pinout, SMA5J28-E3/61 application, or SMA5J28-E3/61 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, RoHS-compliant matte tin plating, MSL Level 1 moisture sensitivity, and thermal resistance of 80 °C/W (junction-to-ambient).
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 28 V), but conducts heavily 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 surface-mount automated placement, SMA5J28-E3/61 uses a DO-214AC case with cathode band marking, rated for -55 °C to +150 °C junction temperature, and meets J-STD-002/JESD 22-B102 solderability standards with JESD 201 Class 1A whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - maximum continuous reverse operating voltage before conduction 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 during 500 W surge, limiting stress on protected ICs |
| IPPM | 11.0 A - peak pulse current supported with 10/1000 µs waveform at 25 °C |
| PPPM | 500 W - maximum non-repetitive surge power handling capability |
| TJ max. | +150 °C - maximum junction temperature, enabling use in under-hood automotive environments |
| RθJA | 80 °C/W - thermal resistance from junction to ambient, guiding PCB copper pad sizing for thermal management |
Pinout & Package
DO-214AC (SMA) surface-mount package: molded epoxy case with matte tin-plated leads, cathode indicated by a band on one end. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), with 2.54 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (for uni-directional operation) | Connected to lower-potential side (e.g., ground or return path); reverse-biased during surge suppression |
| Cathode | Reverse voltage sensing terminal | Marked with band; connected to protected line (e.g., 28 V rail); conducts when line voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile DO-214AC package | Enables compact layout in space-constrained automotive ECUs and industrial controllers |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling |
| AEC-Q101 qualification | Validates suitability for automotive powertrain and body electronics per stress-test requirements |
| MSL Level 1 (260 °C peak) | Allows standard reflow soldering without pre-baking, reducing manufacturing complexity |
| 500 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2/5a surges common in 12 V vehicle electrical systems |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Protecting microcontroller power pins from load-dump transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Shunt TVS diode placed between battery rail and LDO input, clamping spikes to ≤45.4 V. Use Value: Prevents latch-up or permanent damage to downstream regulators and MCUs during alternator load dump events. | Use Scenario: Safeguarding analog outputs of pressure sensors exposed to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional clamp on 0–5 V sensor output line, referenced to system ground. Use Value: Limits transient overvoltage to safe levels while maintaining signal integrity below 28 V stand-off. |
| DC-DC Converter Input Stage | Telecom Equipment Power Rail |
Use Scenario: Input-side surge suppression for buck converters in industrial motor drives. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V input bus upstream of converter MOSFETs. Use Value: Absorbs 500 W surges without degradation, preserving converter efficiency and MOSFET gate integrity. | Use Scenario: Protecting PoE-powered network switches against lightning-induced surges on 48 V supply lines. IC Role / Device Role / Timing Role: Standoff-rated TVS on primary DC input, coordinated with upstream fusing. Use Value: Clamps fast-rising transients within 1 ns response time, meeting IEC 61000-4-5 Level 4 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J28AHE3/61 | AEC-Q101 qualified variant with identical electrical specs and DO-214AC package | Required for automotive safety-critical modules where full AEC-Q101 traceability is mandated | Select SMA5J28AHE3/61 when component-level automotive qualification documentation is required beyond commercial-grade E3 |
| SMC5J28A-E3/57T | Same VWM/VC but in larger DO-214AB (SMC) package; higher IPPM (14.3 A) and PPPM (1500 W) | Suitable where board space allows and higher surge margin is needed (e.g., heavy-duty industrial controls) | Choose SMC5J28A-E3/57T only if 1500 W surge rating and thermal mass justify larger footprint and cost premium |
Compared with SMA5J28AHE3/61, the SMA5J28-E3/61 offers identical protection performance at lower qualification cost; versus SMC5J28A-E3/57T, it trades surge margin for compactness - ideal for space-constrained automotive and consumer designs where 500 W compliance suffices.
Availability
SMA5J28-E3/61 is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor interface clamping, and DC-DC converter input stage surge suppression requiring stable component supply across production lifecycles.
Supply support for SMA5J28-E3/61 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 and automotive-grade qualification.
The SMA5J series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, surface-mount transient suppression in harsh-environment applications including automotive, industrial, and telecom infrastructure.
FAQ
What is the polarity configuration of SMA5J28-E3/61?
SMA5J28-E3/61 is a unidirectional TVS diode, meaning it conducts only in reverse bias above its breakdown voltage. The cathode is marked with a band on the package body, and the anode connects to ground or the lower-potential reference. This configuration makes SMA5J28-E3/61 suitable for DC rail protection where polarity is fixed, unlike bi-directional variants that suppress surges regardless of polarity.
Does SMA5J28-E3/61 meet automotive qualification standards?
SMA5J28-E3/61 is RoHS-compliant and manufactured to commercial-grade specifications. While it shares the same die and package as AEC-Q101-qualified variants like SMA5J28AHE3/61, the SMA5J28-E3/61 itself is not AEC-Q101 certified. For automotive safety-critical applications, engineers must specify the HE3 suffix version to ensure full qualification documentation and traceability for SMA5J28-E3/61-equivalent performance.
What is the maximum clamping voltage of SMA5J28-E3/61 during a surge event?
The maximum clamping voltage (VC) of SMA5J28-E3/61 is 45.4 V, measured at its rated peak pulse current (IPPM) of 11.0 A using a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during transient events, ensuring downstream components such as MCUs or LDOs remain within safe operating ranges when SMA5J28-E3/61 activates.
Can SMA5J28-E3/61 be used in bi-directional signal line protection?
No - SMA5J28-E3/61 is strictly unidirectional and must be installed with correct polarity (cathode toward the protected line). For bi-directional signal lines such as RS-485 or USB D+/D−, a bi-directional variant like SMA5J28CA-E3/61 is required. Using SMA5J28-E3/61 on AC or reversible signals risks forward conduction and failure, as it lacks symmetrical breakdown characteristics in both directions.
What is the thermal resistance and recommended PCB layout for SMA5J28-E3/61?
SMA5J28-E3/61 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. To maintain reliability under repeated surges, designers should implement minimum pad dimensions matching Vishay's recommended layout, avoid thermal relief on pads, and ensure adequate copper area to dissipate heat - critical for sustaining SMA5J28-E3/61 performance at elevated ambient temperatures.
SMA5J28-E3/61 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-E3/61 FAQ
1.How can I place an order for SMA5J28-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J28-E3/61 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-E3/61 reliable?
The price and inventory of SMA5J28-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J28-E3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J28-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J28-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J28-E3/61?
SMA5J28-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J28-E3/61 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-E3/61?
For technical support, including SMA5J28-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J28-E3/61 requirements.
6.How does Aetrix verify that SMA5J28-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J28-E3/61 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-E3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J28-E3/61?
All SMA5J28-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J28-E3/61, 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-E3/61 part is unused and in its original packaging.
Return procedure for SMA5J28-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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