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Vishay General Semiconductor - Diodes Division SMA6J22A-M3/5A
- Part No.:
- SMA6J22A-M3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J22A-M3/5A.pdf
- Description:
- TVS DIODE 22VWM 34.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA6J22A-M3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR at IT = 1 mA), and 34.5 V maximum clamping voltage (VC) at 17.4 A peak pulse current (IPP) under 10/1000 μs waveform. It delivers 600 W peak pulse power (10/1000 μs), operates from –55 °C to +150 °C, and protects MOSFETs and ICs against inductive switching transients in industrial power supplies.
For engineers reviewing the SMA6J22A-M3/5A datasheet, SMA6J22A-M3/5A pinout, SMA6J22A-M3/5A application, or SMA6J22A-M3/5A equivalent, key selection criteria include clamping voltage margin vs. protected device VDS(max), thermal resistance (RθJA = 120 °C/W), unidirectional polarity requirement, and halogen-free RoHS-compliant M3 suffix for industrial-grade reliability.
Technical Context
This TVS diode uses silicon avalanche junction technology to provide fast-response overvoltage protection with sub-nanosecond turn-on time. Its unidirectional configuration enables integration into DC-biased signal or power lines where reverse conduction must be blocked.
Clamping performance is defined by dynamic resistance (RD = 0.437 Ω) and follows VCLmax = RD × IPP + VBRmax, enabling predictable voltage limiting across surge currents. Thermal design requires PCB copper pad area (5.0 mm × 5.0 mm per terminal) to sustain 4 W power dissipation at TA = 50 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse voltage before leakage exceeds 0.2 μA; sets upper limit for safe DC operating bias. |
| VBR (min/max) | 24.4 V / 26.9 V at IT = 1 mA - Confirmed avalanche onset range; ensures reliable triggering above system operating voltage. |
| VC @ IPP | 34.5 V at 17.4 A (10/1000 μs) - Clamped voltage seen by protected circuit during standard surge event. |
| PPPM (10/1000 μs) | 600 W - Peak transient energy handling capability under IEC 61000-4-5 long-duration surge profile. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard PCB layout; determines temperature rise under sustained power stress. |
| Polarity | Unidirectional - Blocks reverse current; requires cathode band orientation toward positive rail in DC applications. |
| Package | SMA (DO-214AC) - Surface-mount outline with 2.54 mm lead pitch; compatible with automated placement and reflow soldering at 260 °C peak. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case meeting UL 94 V-0 flammability rating; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102; cathode denoted by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction or surge clamping | Connected to lower-potential node (e.g., ground or return path); defines direction of transient current flow during clamping. |
| Cathode | Current exit point during forward conduction or surge clamping | Connected to higher-potential node (e.g., supply rail or signal line); color band identifies this terminal for correct PCB orientation. |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free, RoHS-compliant construction | M3 suffix confirms compliance with JEDEC JESD201 Class 2 whisker resistance and environmental regulations for industrial deployments. |
| MSL Level 1 moisture sensitivity | Rated per J-STD-020; allows unlimited floor life and standard reflow without baking preconditioning. |
| Low dynamic resistance (RD) | 0.437 Ω - Minimizes voltage overshoot during high-di/dt transients, improving clamping precision. |
| High IPP capability | 17.4 A (10/1000 μs) - Supports robust protection in motor drive and relay coil snubbing circuits with large stored inductive energy. |
| Wide operating temperature range | –55 °C to +150 °C - Enables use in under-hood automotive modules and industrial PLCs without derating. |
Applications
| DC Power Input Protection | MOSFET Gate Driver Protection |
|---|---|
Use Scenario: 24 V industrial power supply input subjected to load dump and inductive kickback from solenoids. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to clamp transients before they reach DC/DC controller ICs. Use Value: 34.5 V clamping voltage ensures protected ICs with 36 V absolute maximum rating remain within safe operating limits during 10/1000 μs surges. |
Use Scenario: High-side N-channel MOSFET gate driver in motor control H-bridge exposed to shoot-through-induced voltage spikes. IC Role / Device Role / Timing Role: TVS mounted across gate-source terminals to suppress dv/dt-induced false turn-on and gate oxide stress. Use Value: Sub-ns response and 0.437 Ω RD limit gate overvoltage to < 10 V, preventing unintended conduction and cumulative gate degradation. |
| Sensor Signal Line Protection | Telecom Interface Surge Suppression |
Use Scenario: Analog output line of pressure sensor in factory automation system routed alongside AC power cables. IC Role / Device Role / Timing Role: TVS installed in series with signal trace to shunt ESD and coupled noise to ground. Use Value: 0.2 μA max leakage at 22 V ensures minimal impact on 4–20 mA loop accuracy while clamping 8/20 μs lightning surges up to 4000 W. |
Use Scenario: RS-485 data line in outdoor telecom cabinet subject to induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between differential pair and local ground to maintain common-mode integrity. Use Value: 22 V VWM aligns with RS-485 ±12 V common-mode range; 34.5 V VC prevents receiver input damage while preserving signal eye diagram. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J22A-E3/5A | Same electrical specs; RoHS-compliant but not halogen-free; E3 suffix meets JESD201 Class 2 but lacks halogen-free certification. | Acceptable for commercial-grade designs where halogen content is unrestricted; not qualified for aerospace or green-certified industrial systems. | Select when cost sensitivity outweighs halogen-free requirement and MSL Level 1 compliance is sufficient. |
| SMCJ22A-M3 | Higher power rating (1500 W vs. 600 W), larger SMC (DO-214AB) package, same VWM/VBR/VC specs; RθJA = 35 °C/W vs. 120 °C/W. | Used where higher surge repetition rate or longer duration pulses occur; requires larger PCB footprint and enhanced thermal management. | Choose for applications with repeated surges (e.g., elevator control) where SMA6J22A-M3/5A may thermally saturate. |
Compared with SMA6J22A-E3/5A, the M3 variant adds halogen-free assurance without electrical trade-offs; versus SMCJ22A-M3, SMA6J22A-M3/5A offers space-constrained layouts at the cost of reduced single-pulse energy capacity and higher thermal resistance.
Availability
SMA6J22A-M3/5A is available at Aetrix Electronics and suitable for industrial power supplies, motor control modules, sensor interface circuits, and telecom infrastructure requiring stable component supply with halogen-free compliance and MSL Level 1 handling.
Supply support for SMA6J22A-M3/5A 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, TVS devices, and optoelectronics with emphasis on reliability and industrial-grade qualification.
The SMA6JxxA family is engineered for board-level transient suppression in harsh environments, targeting protection of power MOSFETs, microcontrollers, and communication interfaces against ISO 7637-2 and IEC 61000-4-5 threats.
FAQ
What is the maximum clamping voltage of the SMA6J22A-M3/5A under a 10/1000 μs surge?
The SMA6J22A-M3/5A has a maximum clamping voltage (VC) of 34.5 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 17.4 A. This value is measured per the test conditions specified in the Vishay datasheet document 89460, revision 09-Jan-2024, and reflects worst-case clamping performance under standardized surge conditions. The SMA6J22A-M3/5A maintains this clamping level across its operating temperature range when mounted per recommended PCB pad layout.
Does the SMA6J22A-M3/5A support bidirectional transient suppression?
No, the SMA6J22A-M3/5A is a unidirectional TVS diode and does not provide symmetrical clamping for both polarities. Its design intentionally blocks reverse current flow and clamps only positive-going transients relative to its cathode terminal. For bidirectional protection, a separate device such as the SMBJ22A-M3 or a back-to-back diode configuration would be required. The SMA6J22A-M3/5A datasheet explicitly states "Available in unidirectional polarity only" and shows polarity marking via cathode band.
What is the meaning of the "M3" and "5A" suffixes in SMA6J22A-M3/5A?
The "M3" suffix indicates halogen-free, RoHS-compliant construction meeting JEDEC JESD201 Class 2 whisker resistance requirements, while "5A" denotes the packaging format: 7500 units per 13-inch diameter plastic tape and reel. This differs from "61"-suffixed variants, which ship in 1800-unit 7-inch reels. Both M3 and E3 variants share identical electrical characteristics, but only M3 guarantees halogen-free materials. The SMA6J22A-M3/5A ordering code ensures traceable, industrial-grade packaging and material compliance.
Can the SMA6J22A-M3/5A be used in automotive applications?
The SMA6J22A-M3/5A is qualified for industrial-grade operation from –55 °C to +150 °C and meets MSL Level 1 per J-STD-020, but it is not AEC-Q200 qualified. While its electrical and thermal specs align with many automotive subsystem requirements (e.g., body control modules), Vishay does not certify this part for automotive safety-critical or engine-compartment applications. For AEC-Q200-compliant alternatives, consider the Automotive Grade SMA6J22AHE3/5A or consult Vishay's qualified automotive TVS portfolio before deployment in vehicle systems.
How does the thermal resistance of SMA6J22A-M3/5A affect PCB layout?
The SMA6J22A-M3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on a PCB with 5.0 mm × 5.0 mm copper pads per terminal. To achieve rated 4 W power dissipation at TA = 50 °C, designers must implement these minimum pad dimensions and avoid excessive copper isolation. Reducing pad size increases RθJA, causing higher junction temperatures and potential premature failure during repetitive surges. The SMA6J22A-M3/5A thermal performance is highly layout-dependent, and deviation from recommended land pattern directly impacts reliability.
SMA6J22A-M3/5A 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:
- 34.5V
- Current - Peak Pulse (10/1000µs):
- 17.4A
- Power - Peak Pulse:
- 600W
- 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)
SMA6J22A-M3/5A FAQ
1.How can I place an order for SMA6J22A-M3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J22A-M3/5A 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 SMA6J22A-M3/5A reliable?
The price and inventory of SMA6J22A-M3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J22A-M3/5A is usually 5 days.
3.What payment methods are accepted for SMA6J22A-M3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J22A-M3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J22A-M3/5A?
SMA6J22A-M3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J22A-M3/5A 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 SMA6J22A-M3/5A?
For technical support, including SMA6J22A-M3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J22A-M3/5A requirements.
6.How does Aetrix verify that SMA6J22A-M3/5A is sourced from the original manufacturer or authorized distributors?
All SMA6J22A-M3/5A 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 SMA6J22A-M3/5A meets industry standards.
7.What is the process for return or replacement of SMA6J22A-M3/5A?
All SMA6J22A-M3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J22A-M3/5A, 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 SMA6J22A-M3/5A part is unused and in its original packaging.
Return procedure for SMA6J22A-M3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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