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Vishay General Semiconductor - Diodes Division SMA5J22AHE3_A/I
- Part No.:
- SMA5J22AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J22AHE3_A/I.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,550
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Product details
Overview
SMA5J22AHE3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on power and signal lines. It features a 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR), 35.5 V clamping voltage at 14.1 A peak pulse current, 500 W peak pulse power rating, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMA5J22AHE3_A/I datasheet, SMA5J22AHE3_A/I pinout, SMA5J22AHE3_A/I application, or SMA5J22AHE3_A/I equivalent, key selection criteria include clamping performance under 10/1000 µs transients, junction temperature derating above 25 °C, unidirectional polarity marking, 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, responding within picoseconds to transient overvoltages induced by inductive switching or ESD events. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, while the SMA package supports high thermal dissipation (RθJA = 80 °C/W) under repetitive surge conditions.
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Polarity is indicated by a cathode band on the unidirectional SMA5J22AHE3_A/I variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 24.4 V / 26.9 V at 1 mA - Verified breakdown threshold range ensuring reliable turn-on during transients without premature conduction. |
| VC @ IPPM | 35.5 V at 14.1 A - Clamping voltage under 10/1000 µs surge; limits downstream IC stress to safe levels in automotive power rails. |
| PPPM | 500 W - Peak pulse power handling capability; sustains single high-energy surges per ISO 7637-2 Pulse 1/2/5a without failure. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments with thermal derating. |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm × 4.50 mm footprint; optimized for automated placement and thermal pad layout. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case meeting UL 94 V-0 flammability rating; cathode indicated by a visible band on the body; terminals are matte tin plated for robust solder joint reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to protected line (e.g., 24 V rail); conducts only during reverse transient clamping when cathode is held at higher potential. |
| Cathode | Current exit point in forward bias; marked with band | Typically tied to ground or lower-potential reference; establishes clamping path during overvoltage events on anode side. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per stress test requirements. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive 24 V microcontrollers and CAN transceivers. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability across humidity and thermal stress conditions. |
| MSL Level 1 compliance | Enables direct placement into standard SMT reflow profiles without pre-baking, reducing manufacturing complexity and cost. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs of engine control units (ECUs) against load dump and inductive switching spikes per ISO 7637-2. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between power rail and chassis ground to clamp surges below 36 V. Use Value: Limits voltage seen by downstream DC-DC converters and microcontrollers to ≤35.5 V during 14.1 A transients, preventing latch-up or damage. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC modules exposed to relay coil flyback. IC Role / Device Role / Timing Role: Bidirectional-capable protection element (though SMA5J22AHE3_A/I is unidirectional, used with series impedance for signal line protection). Use Value: Maintains signal integrity by clamping transients to 35.5 V while adding <1 pF junction capacitance at 0 V bias, avoiding bandwidth degradation. |
| Telecom Power Supply Input | Consumer Appliance Motor Drive Protection |
Use Scenario: Guarding primary-side 24 V input of PoE-powered network switches against lightning-induced surges on building wiring. IC Role / Device Role / Timing Role: First-line clamping device upstream of bulk capacitors and active regulators. Use Value: Absorbs 500 W peak pulses without degradation, enabling compliance with IEC 61000-4-5 Level 4 (4 kV) testing requirements. |
Use Scenario: Shielding MCU GPIOs and gate drivers in smart washing machine motor control boards from brush-commutator noise. IC Role / Device Role / Timing Role: Unidirectional TVS placed across motor driver supply pins to divert commutation spikes away from logic circuitry. Use Value: Responds in <1 ns to sub-microsecond spikes, limiting voltage excursion to 35.5 V and preserving MOSFET gate oxide integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J22AHM3_A/I | Halogen-free, RoHS-compliant version with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU WEEE, specific OEM specs). | Direct substitution if halogen-free content is required; same thermal and surge performance as SMA5J22AHE3_A/I. |
| SMC5J22AHE3_A/I | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package with 1500 W PPPM and lower RθJA (35 °C/W). | Used where higher surge energy absorption or improved thermal management is needed, e.g., heavy-duty industrial motor drives. | Select when system-level surge tests exceed 500 W; requires PCB layout change due to larger 7.11 mm × 6.22 mm footprint. |
Compared with SMA5J22AHE3_A/I, SMA5J22AHM3_A/I offers identical protection performance with halogen-free construction, while SMC5J22AHE3_A/I delivers triple the pulse power rating in a physically larger package-enabling robustness upgrades without redesigning clamping topology.
Availability
SMA5J22AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, and telecom power supplies requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMA5J22AHE3_A/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, 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 automotive and industrial applications, delivering 500 W surge capability in the compact SMA package while meeting AEC-Q101 stress test requirements.
FAQ
What is the clamping voltage of the SMA5J22AHE3_A/I under a 10/1000 µs surge?
The SMA5J22AHE3_A/I clamps to a maximum of 35.5 V at its rated peak pulse current of 14.1 A under a 10/1000 µs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 5.0 mm × 5.0 mm copper pads) and defines the upper voltage limit imposed on protected circuits during surge events. The SMA5J22AHE3_A/I maintains this clamping performance across its specified junction temperature range.
Is the SMA5J22AHE3_A/I suitable for automotive applications?
Yes, the SMA5J22AHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix indicating RoHS-compliant and AEC-Q101 qualified construction. It meets requirements for temperature cycling, high-temperature reverse bias, and surge endurance relevant to under-hood and cabin ECU environments. The SMA5J22AHE3_A/I is commonly deployed in 24 V power rail protection for ADAS modules and body control units.
What does the "_A/I" suffix mean in SMA5J22AHE3_A/I?
The "_A/I" suffix in SMA5J22AHE3_A/I indicates packaging configuration: "A" denotes the revision code (per Vishay's ordering nomenclature), and "I" specifies 13-inch diameter plastic tape and reel with 7500 units per reel. This format ensures compatibility with high-volume SMT pick-and-place equipment. The SMA5J22AHE3_A/I shares identical electrical and thermal specifications with other packaging variants like SMA5J22AHE3_A/H (7-inch reel, 1800 units).
How does the SMA5J22AHE3_A/I differ from bidirectional TVS diodes like SMA5J22CA?
The SMA5J22AHE3_A/I is unidirectional and features a cathode band for polarity identification, conducting only in reverse breakdown to clamp positive transients on the anode side. In contrast, SMA5J22CA is bidirectional with no polarity marking and symmetrical clamping for AC or dual-polarity signal lines. The SMA5J22AHE3_A/I has a forward voltage drop (~3.5 V at 25 A) absent in bidirectional types, making it unsuitable for AC-coupled paths without additional circuit design considerations.
What is the thermal resistance of the SMA5J22AHE3_A/I, and how does it affect layout?
The SMA5J22AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB construction; increasing copper area or adding thermal vias reduces effective RθJA. Layout must allocate sufficient copper to maintain TJ ≤ 150 °C during repeated surges, especially in enclosed automotive enclosures where ambient temperature exceeds 85 °C.
SMA5J22AHE3_A/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 14.1A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J22AHE3_A/I FAQ
1.How can I place an order for SMA5J22AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J22AHE3_A/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 SMA5J22AHE3_A/I reliable?
The price and inventory of SMA5J22AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J22AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMA5J22AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J22AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J22AHE3_A/I?
SMA5J22AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J22AHE3_A/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 SMA5J22AHE3_A/I?
For technical support, including SMA5J22AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J22AHE3_A/I requirements.
6.How does Aetrix verify that SMA5J22AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMA5J22AHE3_A/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 SMA5J22AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMA5J22AHE3_A/I?
All SMA5J22AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J22AHE3_A/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 SMA5J22AHE3_A/I part is unused and in its original packaging.
Return procedure for SMA5J22AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J22AHE3_A/I Tags
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