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Vishay General Semiconductor - Diodes Division SMA6J22AHM3/5A
- Part No.:
- SMA6J22AHM3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J22AHM3/5A.pdf
- Description:
- TVS DIODE 22VWM 34.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,651
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Product details
Overview
SMA6J22AHM3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, with 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 and is used to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients in industrial and telecom equipment.
For engineers reviewing the SMA6J22AHM3/5A datasheet, SMA6J22AHM3/5A pinout, SMA6J22AHM3/5A application, or SMA6J22AHM3/5A equivalent, key selection criteria include clamping voltage margin relative to protected device VDD, unidirectional polarity compatibility with DC-biased lines, thermal resistance (RθJA = 120 °C/W), and MSL Level 1 moisture sensitivity for reflow compatibility.
Technical Context
This TVS diode operates as a shunt-clamping protection device triggered above its breakdown voltage, diverting surge current away from downstream components. Its dynamic resistance (RD = 0.437 Ω) and low clamping ratio (VC/VBR ≈ 1.38) ensure tight voltage limiting during transient events.
Designed for PCB-level surge immunity per IEC 61000-4-5 (indirect lightning) and IEC 61000-4-4 (EFT), it supports 4000 W peak pulse power under 8/20 μs waveform when mounted on adequate copper area, and maintains operation across -55 °C to +150 °C junction temperature range.
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 normal operating bias. |
| VBR min/max | 24.4 V / 26.9 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on before protected circuit overstress. |
| VC at IPP | 34.5 V at 17.4 A (10/1000 μs) - Clamped voltage seen by downstream IC; must remain below absolute maximum rating of protected device. |
| PPPM (10×1000 μs) | 600 W - Sustained surge energy handling capability; defines survivability under long-duration transients like load dump. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance; determines temperature rise under DC leakage or repeated surges on standard PCB pads. |
| Polarity | Unidirectional - Cathode-banded configuration; suitable only for DC-biased or positive-going transient protection paths. |
| MSL Level | Level 1 per J-STD-020 - No floor life limitation; supports standard reflow without baking prior to assembly. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case with matte tin-plated leads, UL 94 V-0 rated, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink path during clamping | Connected to protected line (e.g., signal or power rail); carries full IPP during surge event. |
| Cathode | Reference node tied to system ground or return path | Must be low-inductance connection to ground plane; determines clamping reference level and affects VC accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Clamping performance | VC/VBR = 1.38 - Low overvoltage margin ensures robust protection of 24 V logic and interface ICs without overdesign. |
| Thermal reliability | RθJL = 25 °C/W - Efficient heat transfer to PCB copper pads enables sustained operation at TA = 50 °C with 4 W derated power dissipation. |
| Process compliance | M3 suffix - Halogen-free, RoHS-compliant, and JESD 201 Class 2 whisker-resistant plating for high-reliability industrial use. |
| Mounting suitability | Low-profile DO-214AC outline - Compatible with automated pick-and-place; supports 13" tape-and-reel (5A packaging code) for high-volume production. |
Applications
| Industrial Motor Control Inputs | Telecom Line Interface Protection |
|---|---|
Use Scenario: Protecting PLC digital input modules from inductive kickback generated by solenoid and relay coil de-energization. IC Role / Device Role / Timing Role: Shunt-clamping TVS placed between field input and optocoupler input stage. Use Value: Limits transient voltage to ≤34.5 V, preventing damage to 24 V-rated optocouplers and enabling >100,000-cycle reliability without degradation. |
Use Scenario: Safeguarding RS-485 transceivers on base station backhaul links exposed to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary front-end surge suppressor on differential bus lines, upstream of common-mode choke and transceiver ESD diodes. Use Value: Absorbs 4000 W (8/20 μs) surges while maintaining <1 nF junction capacitance to preserve signal integrity up to 20 Mbps. |
| Automotive Body Control Module Sensors | Consumer Appliance Power Supply Monitoring |
Use Scenario: Shielding LIN bus sensors (e.g., door latch, seat position) from battery load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS on sensor supply rail (VBAT-connected), referenced to chassis ground. Use Value: Withstands 50 A IFSM surge and operates from -55 °C to +150 °C, meeting AEC-Q200 stress test requirements for under-hood placement. |
Use Scenario: Securing microcontroller reset and brown-out detection inputs in washing machine main control boards subjected to AC line switching noise. IC Role / Device Role / Timing Role: Standoff protection element on 3.3 V or 5 V monitoring rail, clamping fast EFT bursts before they trigger false resets. Use Value: Delivers <0.2 μA leakage at 22 V, eliminating DC loading error on precision voltage dividers used for supply monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J22AHE3/5A | Same electrical specs; E3 suffix = RoHS-compliant, non-halogen-free, JESD 201 Class 2 whisker-tested. | No halogen-free requirement; acceptable for consumer-grade or non-industrial environments. | Select when halogen-free certification is not mandated and cost optimization is prioritized. |
| SMB6J22AHM3 | Higher 600 W PPPM rating same; SMB package (DO-214AA) offers 20 % larger pad area and lower RθJA (100 °C/W vs. 120 °C/W). | Requires PCB layout change; better thermal performance for high-duty-cycle surge environments. | Choose when thermal headroom is constrained and board space allows SMB footprint. |
Compared with SMA6J22AHM3/5A, the E3 variant trades halogen-free compliance for broader commercial acceptance, while the SMB6J22AHM3 improves thermal dissipation at the cost of footprint compatibility-neither is pin-compatible due to differing package outlines.
Availability
SMA6J22AHM3/5A is available at Aetrix Electronics and suitable for industrial motor control inputs, telecom line interface protection, and automotive body control module sensors requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMA6J22AHM3/5A 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 ruggedness.
The SMA6JxxA series is part of Vishay's Transient Voltage Suppressor family, engineered for robust, surface-mount surge protection in harsh industrial, telecom, and automotive environments where consistent clamping and MSL-1 reflow compatibility are critical.
FAQ
What is the maximum clamping voltage of the SMA6J22AHM3/5A under a 10/1000 μs surge?
The SMA6J22AHM3/5A has a maximum clamping voltage (VC) of 34.5 V at 17.4 A peak pulse current under the 10/1000 μs waveform. This value is measured per the conditions specified in the Vishay datasheet (Document Number: 89460), with device mounted on 5.0 mm × 5.0 mm copper pads. The SMA6J22AHM3/5A achieves this clamping performance while maintaining low dynamic resistance (0.437 Ω), ensuring predictable voltage limiting during real-world transients.
Is the SMA6J22AHM3/5A suitable for bidirectional signal line protection?
No, the SMA6J22AHM3/5A is unidirectional only, with polarity indicated by a cathode band. It is designed to clamp positive transients on DC-biased lines referenced to ground. For bidirectional protection-such as AC-coupled or floating data lines-engineers must select a dedicated bidirectional TVS like the SMA6J22CA series. Using SMA6J22AHM3/5A on bidirectional paths risks forward conduction and failure during negative excursions.
What does the "M3" suffix indicate in SMA6J22AHM3/5A?
"M3" denotes halogen-free, RoHS-compliant construction with matte tin-plated leads qualified to JESD 201 Class 2 for whisker resistance. It also confirms compliance with Vishay's material categorization standard (www.vishay.com/doc?99912). The SMA6J22AHM3/5A meets industrial-grade reliability requirements and is intended for applications where halogen-free content is mandated by environmental or safety regulations.
Can the SMA6J22AHM3/5A withstand repeated surge events?
Yes-the SMA6J22AHM3/5A is rated for non-repetitive surge pulses per Figure 1 and Figure 2 in the datasheet, with derating applied above TA = 25 °C. Its 150 °C maximum junction temperature and 120 °C/W thermal resistance allow limited repetition if sufficient cooling time is provided between events. However, for repetitive surge environments, system-level testing per IEC 61000-4-5 is required to validate lifetime performance of the SMA6J22AHM3/5A under actual duty cycles.
What is the leakage current specification for SMA6J22AHM3/5A at its stand-off voltage?
The SMA6J22AHM3/5A exhibits a maximum reverse leakage current (ID) of 0.2 μA at its 22 V stand-off voltage (VWM), measured at TA = 25 °C. This ultra-low leakage ensures minimal power loss and no measurable impact on voltage divider accuracy or high-impedance sensing nodes-critical for precision monitoring circuits where the SMA6J22AHM3/5A is deployed.
SMA6J22AHM3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA6J22AHM3/5A FAQ
1.How can I place an order for SMA6J22AHM3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J22AHM3/5A 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 SMA6J22AHM3/5A reliable?
The price and inventory of SMA6J22AHM3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J22AHM3/5A is usually 5 days.
3.What payment methods are accepted for SMA6J22AHM3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J22AHM3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J22AHM3/5A?
SMA6J22AHM3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J22AHM3/5A 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 SMA6J22AHM3/5A?
For technical support, including SMA6J22AHM3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J22AHM3/5A requirements.
6.How does Aetrix verify that SMA6J22AHM3/5A is sourced from the original manufacturer or authorized distributors?
All SMA6J22AHM3/5A 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 SMA6J22AHM3/5A meets industry standards.
7.What is the process for return or replacement of SMA6J22AHM3/5A?
All SMA6J22AHM3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J22AHM3/5A, 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 SMA6J22AHM3/5A part is unused and in its original packaging.
Return procedure for SMA6J22AHM3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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