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Vishay General Semiconductor - Diodes Division SMA5J22A-E3/5A
- Part No.:
- SMA5J22A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J22A-E3/5A.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA5J22A-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 power and signal lines. It features a 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 35.5 V clamping voltage (VC) at 14.1 A peak pulse current (IPPM), and 500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial power supply inputs.
For engineers reviewing the SMA5J22A-E3/5A datasheet, SMA5J22A-E3/5A pinout, SMA5J22A-E3/5A application, or SMA5J22A-E3/5A equivalent, key selection criteria include unidirectional polarity, 150 °C max junction temperature, RoHS-compliant matte tin-plated leads, MSL Level 1 rating, 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 its VBR threshold, limiting transient-induced overvoltage to ≤35.5 V at 14.1 A. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at 22 V), while low incremental surge resistance enables effective energy diversion during fast transients.
The SMA5J22A-E3/5A is rated for non-repetitive 8.3 ms half-sine surge current up to 40 A (IFSM), supports operation from –55 °C to +150 °C, and exhibits typical thermal resistance of 80 °C/W (junction-to-ambient) when mounted per recommended pad layout - critical for thermal management in compact power rail designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range on protected line. |
| VBR (min/max) | 24.4 V / 26.9 V at 1 mA - precise avalanche onset range ensuring predictable turn-on without premature conduction. |
| VC @ IPPM | 35.5 V at 14.1 A - clamped voltage under standardized 10/1000 µs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 500 W - peak pulse power handling capability; defines maximum transient energy absorption per event. |
| IFSM | 40 A - surge current rating for 8.3 ms half-sine waveform; validates robustness against inrush or load-dump events. |
| TJ max. | +150 °C - maximum junction temperature; enables reliable operation in under-hood automotive or enclosed industrial environments. |
| Package | SMA (DO-214AC) - surface-mount package with 5.28 mm × 4.50 mm footprint and 2.29 mm height; compatible with standard reflow profiles. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; cathode indicated by band at one end; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward-biased surges or ESD events. |
| Cathode (banded end) | Avalanche clamping terminal | Connected to protected line (e.g., 24 V rail or sensor output); initiates clamping when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMA package | Enables high-density PCB layouts and compatibility with automated pick-and-place systems without height interference. |
| Glass-passivated junction | Ensures stable, repeatable breakdown characteristics and long-term reliability under repeated surge stress. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow processing at peak temperature up to 260 °C without moisture-related failure. |
| RoHS-compliant & halogen-free option available | E3 suffix denotes commercial-grade RoHS compliance; supports environmental compliance requirements for global OEM programs. |
| AEC-Q101 qualification path | HE3/HM3 variants exist for automotive use; this E3/5A variant shares identical die and construction, enabling qualification traceability. |
Applications
| Automotive Sensor Protection | Industrial Power Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between sensor signal line and ground to shunt transients before reaching precision amplifier or MCU input. Use Value: Limits induced voltage to ≤35.5 V during 14.1 A surge, preserving signal integrity and preventing latch-up in 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding 24 V DC power rails in PLC I/O modules and motor drive control boards against inductive switching spikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp across input terminals, coordinated with upstream fuse and downstream DC-DC converter. Use Value: Absorbs 500 W transient energy without degradation, maintaining system uptime during relay coil de-energization events. |
| Consumer Power Adapter Interface | Telecom Line Card Surge Suppression |
Use Scenario: Secondary-side surge protection in AC/DC adapters and USB-C PD power bricks exposed to mains-borne transients. IC Role / Device Role / Timing Role: Final-stage TVS on +VOUT rail, positioned after primary regulation and before connector output. Use Value: Clamps fast-rising surges (≤1 ns rise time) to safe levels for USB-PD controllers and battery management ICs. |
Use Scenario: Front-end protection on Ethernet PHY power and data lines in enterprise switches and base station backhaul cards. IC Role / Device Role / Timing Role: Standoff-rated TVS on 3.3 V/5 V bias rails feeding magnetics and PHY ICs, meeting IEC 61000-4-5 Level 3. Use Value: Withstands repeated 1 kV/0.5 kA surges while maintaining <1.0 µA leakage at 22 V, minimizing standby power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J22A-M3/5A | Halogen-free, RoHS-compliant variant with identical electrical specs and thermal performance. | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU public infrastructure projects). | Direct drop-in replacement for SMA5J22A-E3/5A in same tape-and-reel format (13" reel, 7500 pcs); no layout or qualification change required. |
| SMA6J22A-E3/5A | 600 W PPPM rating (vs. 500 W), higher IPPM (17.1 A), same VWM/VBR/VC, identical SMA package and pinout. | Better suited for systems requiring higher surge margin (e.g., heavy-duty industrial controls or railway auxiliary supplies). | Select SMA6J22A-E3/5A when design margin analysis shows >10% headroom needed beyond 500 W; otherwise SMA5J22A-E3/5A remains optimal cost/performance choice. |
Compared with SMA5J22A-M3/5A, the SMA5J22A-E3/5A offers identical protection performance with standard RoHS compliance; compared with SMA6J22A-E3/5A, it provides proven 500 W capability at lower cost and smaller inventory footprint for applications not requiring 600 W headroom.
Availability
SMA5J22A-E3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial power input stages, and telecom line card protection requiring stable component supply, consistent lead-time visibility, and full traceability from wafer to shipment.
Supply support for SMA5J22A-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 part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density surface-mount surge suppression in space-constrained, high-reliability applications across automotive, industrial, and communications markets.
FAQ
What is the maximum clamping voltage of the SMA5J22A-E3/5A under surge conditions?
The SMA5J22A-E3/5A has a maximum clamping voltage (VC) of 35.5 V when subjected to its rated peak pulse current (IPPM) of 14.1 A using the standard 10/1000 µs waveform. This value is measured at TA = 25 °C with the device mounted on 5.0 mm × 5.0 mm copper pads per the datasheet test condition - critical for validating voltage margin on protected ICs like microcontrollers or transceivers.
Is the SMA5J22A-E3/5A suitable for automotive applications?
The SMA5J22A-E3/5A itself is commercial-grade, but it shares identical die, construction, and qualification-ready process with AEC-Q101-qualified variants (e.g., SMA5J22AHE3_A). Many Tier 1 automotive suppliers use the E3/5A version in non-safety-critical subsystems such as body control modules and infotainment power rails, provided internal validation confirms compliance with system-level surge requirements.
What does the "E3/5A" suffix mean in SMA5J22A-E3/5A?
In SMA5J22A-E3/5A, "E3" indicates RoHS-compliant, commercial-grade construction with matte tin-plated leads, while "5A" specifies the packaging format: 13-inch diameter plastic tape and reel containing 7500 units. This differs from "E3/61", which uses a 7-inch reel with 1800 units - both share identical electrical and thermal specifications.
How does the thermal performance of SMA5J22A-E3/5A affect PCB layout?
The SMA5J22A-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on minimum recommended 5.0 mm × 5.0 mm copper pads. To maintain TJ ≤ 150 °C during repetitive surges, designers must ensure adequate copper area and avoid thermal isolation - undersized pads or narrow traces increase RθJA and risk thermal runaway during sustained transient activity.
Can SMA5J22A-E3/5A be used in bidirectional configurations?
No - SMA5J22A-E3/5A is strictly unidirectional, as confirmed by its part number suffix "A" (not "CA") and cathode band marking. For bidirectional protection, the functionally matched SMA5J22CA-E3/5A must be used; it exhibits symmetrical clamping in both directions and lacks polarity marking, making it unsuitable as a direct replacement without circuit redesign.
SMA5J22A-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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J22A-E3/5A FAQ
1.How can I place an order for SMA5J22A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J22A-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 SMA5J22A-E3/5A reliable?
The price and inventory of SMA5J22A-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 SMA5J22A-E3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J22A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J22A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J22A-E3/5A?
SMA5J22A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J22A-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 SMA5J22A-E3/5A?
For technical support, including SMA5J22A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J22A-E3/5A requirements.
6.How does Aetrix verify that SMA5J22A-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J22A-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 SMA5J22A-E3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J22A-E3/5A?
All SMA5J22A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J22A-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 SMA5J22A-E3/5A part is unused and in its original packaging.
Return procedure for SMA5J22A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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