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Vishay General Semiconductor - Diodes Division SMA5J28AHM3/I
- Part No.:
- SMA5J28AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J28AHM3/I.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,855
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Product details
Overview
SMA5J28AHM3/I from Vishay General Semiconductor is a unidirectional 500 W transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, with 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR), and 11.0 A peak pulse current (IPPM) at 45.4 V clamping voltage (VC). It protects MOSFETs and ICs against inductive switching transients in automotive power supplies.
For engineers reviewing the SMA5J28AHM3/I datasheet, SMA5J28AHM3/I pinout, SMA5J28AHM3/I application, or SMA5J28AHM3/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, halogen-free RoHS compliance, 150 °C max junction temperature, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping device that enters avalanche conduction when reverse voltage exceeds VBR, limiting transient energy to protect downstream components. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1 ns).
Designed for 10/1000 μs surge waveforms, it delivers 500 W peak pulse power with low incremental surge resistance and thermal resistance of 25 °C/W (junction-to-lead). The SMA package supports MSL level 1 reflow up to 260 °C peak.
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; defines turn-on threshold |
| VC @ IPPM | 45.4 V - Clamped voltage during 11.0 A 10/1000 μs surge; determines protected circuit's maximum stress |
| PPPM | 500 W - Peak transient power handling capability under standardized surge waveform |
| IFSM | 40 A - Non-repetitive forward surge rating (8.3 ms half-sine); relevant for fault-current paths |
| TJ max | +150 °C - Maximum junction temperature; sets thermal derating limit above 25 °C ambient |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional polarity marked by cathode band. 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 / transient return path | Connected to ground or low-impedance return in clamping configuration; carries full surge current during operation |
| Cathode | Reverse-biased terminal / protected line connection | Connected to the line being protected (e.g., 24 V rail); avalanche conduction initiates here during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free, RoHS-compliant construction | Meets IEC 61249-2-21; eliminates brominated flame retardants for safer end-of-life processing |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22-A114 |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1.0 μA) across temperature and lifetime |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile up to 260 °C peak without baking |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Suppressing load-dump transients on 24 V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges up to ISO 7637-2 Pulse 5a. Use Value: Limits rail voltage to ≤45.4 V during 11 A transients, preventing damage to 36 V-rated DC-DC converters and microcontrollers. | Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loop) from ESD and inductive kickback in factory automation sensors. IC Role / Device Role / Timing Role: Low-capacitance TVS connected from signal line to ground, leveraging fast <1 ns response to shunt nanosecond ESD events. Use Value: Maintains signal integrity with <1.0 μA leakage at 28 V, while clamping 8 kV contact ESD to safe levels without affecting loop accuracy. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding PoE-powered equipment inputs against lightning-induced surges on 48 V DC supply lines. IC Role / Device Role / Timing Role: Primary clamping device in series with input filter, rated for repeated 500 W transients per IEEE C62.41. Use Value: Withstands multiple 10/1000 μs surges up to 11 A without degradation, enabling compliance with UL 60950-1 secondary circuit protection requirements. | Use Scenario: Shielding MCU GPIOs and gate drivers from back-EMF spikes generated by brushed DC motors in smart home appliances. IC Role / Device Role / Timing Role: Localized TVS mounted adjacent to motor terminals, absorbing commutation spikes before propagation into control logic. Use Value: 40 A IFSM rating handles repetitive motor stall currents; 25 °C/W RθJL enables efficient heat transfer to PCB copper during burst events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J28AHE3_A/H | Same electrical specs; RoHS-compliant but not halogen-free; AEC-Q101 qualified | Identical automotive use case; lacks halogen-free certification required for some Tier 1 OEMs | Select when halogen-free requirement is waived but AEC-Q101 remains mandatory |
| SMA5J28A-M3/61 | Same electrical specs; halogen-free RoHS-compliant; not AEC-Q101 qualified; commercial grade only | Suitable for industrial or consumer applications where automotive qualification is unnecessary | Select for cost-sensitive non-automotive designs requiring halogen-free compliance |
Compared with SMA5J28AHM3/I, SMA5J28AHE3_A/H offers identical performance with AEC-Q101 but no halogen-free assurance, while SMA5J28A-M3/61 provides halogen-free compliance at commercial-grade reliability-making the HM3/I variant the sole choice for halogen-free + AEC-Q101 dual requirements.
Availability
SMA5J28AHM3/I is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface design, and telecom DC input safeguarding requiring stable component supply across long production lifecycles.
Supply support for SMA5J28AHM3/I 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, and protection devices with emphasis on high-reliability and automotive-grade solutions.
The SMA5J series is engineered for high-power-density transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where robustness against ISO 7637-2 and IEC 61000-4-5 surges is critical.
FAQ
What is the clamping voltage of the SMA5J28AHM3/I under a 10/1000 µs surge?
The SMA5J28AHM3/I clamps to a maximum of 45.4 V when subjected to its rated 11.0 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured at TA = 25 °C with devices mounted on 5.0 mm × 5.0 mm copper pads per terminal, and represents the upper bound of voltage seen by protected circuitry during transient events.
Is the SMA5J28AHM3/I qualified for automotive applications?
Yes, the SMA5J28AHM3/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in datasheet 88875. This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD, making SMA5J28AHM3/I suitable for under-hood and body-control module applications in passenger vehicles.
What does the "HM3" suffix indicate in SMA5J28AHM3/I?
The "HM3" suffix in SMA5J28AHM3/I denotes halogen-free, RoHS-compliant construction combined with AEC-Q101 qualification. It distinguishes this variant from "HE3" (RoHS + AEC-Q101, not halogen-free) and "M3" (halogen-free + RoHS, commercial grade only), confirming full compliance with both environmental and automotive reliability standards.
Can SMA5J28AHM3/I be used in bidirectional configurations?
No, SMA5J28AHM3/I is a unidirectional TVS diode, as indicated by the "A" (not "CA") suffix in its base part number. Bidirectional variants such as SMA5J28CA exist but differ in VBR symmetry and leakage behavior; substituting SMA5J28AHM3/I in bidirectional circuits would result in improper clamping during positive transients.
What is the maximum junction temperature rating for SMA5J28AHM3/I?
The SMA5J28AHM3/I has a maximum junction temperature (TJ) rating of +150 °C, specified across its operating and storage range of –55 °C to +150 °C. This rating governs thermal derating curves in Figure 2 of the datasheet and must be respected in PCB layout to ensure long-term reliability under sustained surge conditions.
SMA5J28AHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J28AHM3/I FAQ
1.How can I place an order for SMA5J28AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J28AHM3/I 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 SMA5J28AHM3/I reliable?
The price and inventory of SMA5J28AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J28AHM3/I is usually 5 days.
3.What payment methods are accepted for SMA5J28AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J28AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J28AHM3/I?
SMA5J28AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J28AHM3/I 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 SMA5J28AHM3/I?
For technical support, including SMA5J28AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J28AHM3/I requirements.
6.How does Aetrix verify that SMA5J28AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMA5J28AHM3/I 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 SMA5J28AHM3/I meets industry standards.
7.What is the process for return or replacement of SMA5J28AHM3/I?
All SMA5J28AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J28AHM3/I, 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 SMA5J28AHM3/I part is unused and in its original packaging.
Return procedure for SMA5J28AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J28AHM3/I Tags
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