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Vishay General Semiconductor - Diodes Division SMA6J22A-M3/61
- Part No.:
- SMA6J22A-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J22A-M3/61.pdf
- Description:
- TVS DIODE 22VWM 34.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA6J22A-M3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping transient overvoltages on power and signal lines. It features a 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR at IT = 1 mA), 34.5 V maximum clamping voltage at 17.4 A (10/1000 μs), 600 W peak pulse power rating, and operates from –55 °C to +150 °C junction temperature.
For engineers reviewing the SMA6J22A-M3/61 datasheet, SMA6J22A-M3/61 pinout, SMA6J22A-M3/61 application, or SMA6J22A-M3/61 equivalent, key selection considerations include clamping performance under 10/1000 μs surges, thermal resistance (RθJA = 120 °C/W), unidirectional polarity, RoHS-compliant halogen-free construction, and compatibility with automated SMT placement on PCBs with 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches to divert surge current away from downstream ICs or MOSFETs. Its dynamic resistance (RD = 0.437 Ω) directly determines clamping voltage rise under surge (VCL = RD × IPP + VBRmax), enabling predictable protection behavior.
Designed for single-pulse transients per IEC 61000-4-5 (10/1000 μs) and lightning surge standards (8/20 μs), it delivers 4000 W peak pulse power under 8/20 μs waveform while maintaining low leakage (<0.2 μA at VWM) and stable VBR temperature coefficient (αT = 9.5 × 10⁻⁴ /°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 24.4 V / 26.9 V at IT = 1 mA - Breakdown onset range; ensures reliable avalanche initiation without premature triggering. |
| VC @ IPP | 34.5 V at 17.4 A (10/1000 μs) - Clamped voltage during standard surge; must remain below protected device's absolute maximum rating. |
| PPPM (10/1000 μs) | 600 W - Peak transient energy handling capacity under standardized long-duration surge waveform. |
| IFSM | 50 A - Non-repetitive forward surge current rating; supports inrush or fault-current events without bond-wire failure. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in high-ambient industrial environments with appropriate PCB thermal design. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard 5.0 mm × 5.0 mm copper pads; dictates required board-level copper area for thermal management. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional polarity with cathode indicated by molded band. Matte tin-plated leads meet J-STD-002 solderability and JESD 22-B102 reliability standards. M3 suffix denotes halogen-free, RoHS-compliant, industrial-grade construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge current sink (in reverse-biased protection mode) | Connected to protected line (e.g., VBUS or signal trace); conducts surge current to ground when clamping. |
| Cathode | Reference terminal / Ground reference node | Connected to system ground or low-impedance return path; establishes polarity and defines clamping reference point. |
Key Features
| Feature | Design Value |
|---|---|
| Clamping voltage control | VC = 34.5 V at 17.4 A (10/1000 μs) with RD = 0.437 Ω - Enables precise coordination with downstream IC voltage tolerances. |
| Thermal robustness | RθJA = 120 °C/W on 5 mm² pads - Supports sustained operation up to +150 °C junction temperature in compact industrial layouts. |
| Automated assembly readiness | MSL Level 1, LF peak 260 °C - Compatible with standard lead-free reflow profiles without moisture sensitivity concerns. |
| Environmental compliance | M3 suffix: Halogen-free, RoHS-compliant, JESD 201 Class 2 whisker resistant - Meets industrial and green electronics requirements. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O against inductive kickback from relay coils and solenoid loads. IC Role / Device Role: Unidirectional shunt clamp placed between VDD and GND rails near sensitive logic inputs. Use Value: Limits transient overshoot to ≤34.5 V, preventing latch-up or oxide damage in 3.3 V/5 V MCUs and half-bridge drivers. |
Use Scenario: Shielding LIN bus transceivers and sensor interfaces from load-dump and jump-start surges. IC Role / Device Role: Line-side TVS on power input and bidirectional signal lines (with additional series impedance). Use Value: Withstands 4000 W (8/20 μs) pulses while maintaining <0.2 μA leakage at 22 V, preserving bus quiescent current budget. |
| Consumer Power Adapters | Telecom PoE Injectors |
|
Use Scenario: Secondary-side overvoltage suppression on DC output rails of AC/DC adapters after rectification and filtering. IC Role / Device Role: Final-stage clamping element before USB-C PD or legacy 5 V/12 V outputs. Use Value: 600 W (10/1000 μs) rating handles capacitor discharge transients; 22 V VWM aligns with 24 V nominal output designs. |
Use Scenario: Primary-side surge protection on 48 V DC input of IEEE 802.3af/at/bt PoE injectors before DC-DC conversion. IC Role / Device Role: Standoff-rated TVS on input bus to absorb lightning-induced common-mode surges. Use Value: 26.9 V VBR max ensures no conduction during normal 48 V operation; 34.5 V VC limits stress on upstream FETs and controllers. |
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-E3/61 | Same electrical specs; RoHS-compliant but not halogen-free; E3 suffix uses standard molding compound. | No difference in circuit function or layout; differs only in material compliance profile. | Select E3 for cost-sensitive industrial applications where halogen-free requirement is not mandated. |
| SMB6J22A-M3 | Same VWM/VBR/VC ratings, but SMB (DO-214AA) package: 4.6 mm × 3.6 mm vs. SMA's 4.3 mm × 2.6 mm; higher RθJA (~150 °C/W). | Requires larger PCB pad area; lower power density; less suitable for space-constrained layouts. | Choose SMB6J22A-M3 only if existing footprint mandates DO-214AA or thermal derating allows higher RθJA. |
Compared with SMA6J22A-E3/61, the M3 variant adds halogen-free compliance without sacrificing electrical performance; versus SMB6J22A-M3, the SMA package delivers 20% smaller footprint and 20% lower thermal resistance-critical for dense power rail protection in modern adapters and modules.
Availability
SMA6J22A-M3/61 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and consumer power adapters requiring stable component supply, halogen-free compliance, and repeatable surge immunity performance across production batches.
Supply support for SMA6J22A-M3/61 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, power handling, and industrial-grade qualification.
The SMA6JxxA series is part of Vishay's Transient Voltage Suppressor family, engineered specifically for robust, surface-mount overvoltage protection in power supplies, automotive electronics, and industrial controls where consistent clamping and thermal stability are critical.
FAQ
What is the maximum clamping voltage of the SMA6J22A-M3/61 under a 10/1000 μs surge?
The SMA6J22A-M3/61 has a maximum clamping voltage (VC) of 34.5 V when subjected to a 10/1000 μs waveform at 17.4 A peak pulse current. This value is measured per JEDEC standards and reflects worst-case device behavior under specified test conditions. The SMA6J22A-M3/61 maintains this clamping performance across its qualified operating temperature range.
Is the SMA6J22A-M3/61 suitable for bidirectional transient protection?
No, the SMA6J22A-M3/61 is a unidirectional TVS diode, intended only for DC or single-polarity line protection. It conducts in reverse bias above VBR and blocks forward current up to VF ≈ 3.5 V at 25 A. For bidirectional protection, a dedicated bidirectional TVS like SMA6J22CA-M3/61 would be required. The SMA6J22A-M3/61 datasheet explicitly states "available in unidirectional polarity only."
What does the "M3" suffix indicate in SMA6J22A-M3/61?
The "M3" suffix in SMA6J22A-M3/61 specifies halogen-free, RoHS-compliant construction meeting JESD 201 Class 2 whisker resistance requirements. It also denotes industrial-grade qualification and use of matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. This distinguishes it from the E3 variant, which is RoHS-compliant but not halogen-free.
Can the SMA6J22A-M3/61 be used in automotive applications?
Yes, the SMA6J22A-M3/61 is rated for –55 °C to +150 °C operating junction temperature and meets MSL Level 1 reflow requirements, making it suitable for under-hood and body-control module applications. Its 4000 W (8/20 μs) rating supports ISO 7637-2 and IEC 61000-4-5 surge immunity testing. However, full AEC-Q200 qualification requires verification by the end customer per their specific stress profile.
What PCB pad layout is recommended for optimal thermal performance of the SMA6J22A-M3/61?
Vishay specifies a minimum 5.0 mm × 5.0 mm copper pad for each terminal to achieve the published RθJA of 120 °C/W. Reducing pad size increases thermal resistance and reduces surge power handling capability. The SMA6J22A-M3/61 datasheet includes exact mounting dimensions and recommends using thermal vias beneath pads for enhanced heat dissipation in high-power or high-ambient designs.
SMA6J22A-M3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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-M3/61 FAQ
1.How can I place an order for SMA6J22A-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J22A-M3/61 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 SMA6J22A-M3/61 reliable?
The price and inventory of SMA6J22A-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J22A-M3/61 is usually 5 days.
3.What payment methods are accepted for SMA6J22A-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J22A-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J22A-M3/61?
SMA6J22A-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J22A-M3/61 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 SMA6J22A-M3/61?
For technical support, including SMA6J22A-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J22A-M3/61 requirements.
6.How does Aetrix verify that SMA6J22A-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMA6J22A-M3/61 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 SMA6J22A-M3/61 meets industry standards.
7.What is the process for return or replacement of SMA6J22A-M3/61?
All SMA6J22A-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J22A-M3/61, 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 SMA6J22A-M3/61 part is unused and in its original packaging.
Return procedure for SMA6J22A-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6J22A-M3/61 Tags
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