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Vishay General Semiconductor - Diodes Division SMA6J22A-E3/5A
- Part No.:
- SMA6J22A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J22A-E3/5A.pdf
- Description:
- TVS DIODE 22VWM 40.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA6J22A-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients 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), 34.5 V maximum clamping voltage at 17.4 A (10/1000 μs), 600 W peak pulse power rating, and operates across –55 °C to +150 °C junction temperature range. It protects MOSFETs and ICs in industrial power supplies.
For engineers reviewing the SMA6J22A-E3/5A datasheet, SMA6J22A-E3/5A pinout, SMA6J22A-E3/5A application, or SMA6J22A-E3/5A equivalent, key selection criteria include clamping voltage at rated IPP, unidirectional polarity, SMA package thermal resistance (RθJA = 120 °C/W), and compliance with J-STD-020 MSL level 1.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (< 0.2 μA leakage at 22 V), but conducts heavily when reverse voltage exceeds VBR, limiting transient energy via controlled avalanche breakdown. Its dynamic resistance (RD = 0.437 Ω) directly determines clamping voltage rise with surge current (VCL = RD × IPP + VBRmax).
Thermal design relies on PCB copper pad area (5.0 mm × 5.0 mm per terminal) to sustain 4 W power dissipation at TA = 50 °C; junction-to-lead thermal resistance (RθJL = 25 °C/W) supports localized heat transfer during short-duration surges like 8.3 ms half-sine IFSM = 50 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping threshold. |
| VBR (min/max) | 24.4 V / 26.9 V at 1 mA - Confirmed breakdown onset range; ensures reliable triggering above VWM with process tolerance. |
| VC at IPP | 34.5 V at 17.4 A (10/1000 μs) - Measured clamping voltage under standard surge; must stay below protected device's absolute maximum rating. |
| PPPM (10×1000 μs) | 600 W - Peak transient energy handling capability; determines survivability of common inductive-switching transients. |
| IFSM | 50 A - Non-repetitive forward surge rating; validates robustness against accidental reverse-bias misconnection or fault currents. |
| TJ max. | +150 °C - Maximum junction temperature; sets upper limit for ambient + self-heating in enclosed industrial enclosures. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard PCB pads; used to calculate temperature rise under DC leakage or repeated pulses. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional polarity with cathode band marking. Matte tin-plated leads, RoHS-compliant (E3 suffix), MSL level 1, LF peak 260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to lower-potential side (e.g., GND or return rail); completes clamping loop during overvoltage events. |
| Cathode | Transient voltage sensing / clamping node | Connected to protected line (e.g., 24 V rail or signal input); avalanche conduction begins here when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Clamping performance | 34.5 V clamping at 17.4 A (10/1000 μs) enables protection of 3.3 V–24 V logic and power rails without overstressing downstream ICs. |
| Low dynamic resistance | RD = 0.437 Ω minimizes clamping voltage increase with surge current-critical for maintaining tight voltage margins during fast transients. |
| Thermal reliability | RθJL = 25 °C/W and RθJA = 120 °C/W support stable operation up to +150 °C junction temperature with standard PCB layout. |
| Automated assembly compatibility | MSL level 1 rating and matte tin plating ensure robust reflow soldering at 260 °C peak without delamination or whisker risk. |
| Industrial-grade construction | E3 suffix denotes RoHS-compliant, industrial-temperature-grade molding compound meeting UL 94 V-0 flammability. |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) Inputs |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between 24 V rail and ground to clamp transients before they reach DC/DC converter ICs. Use Value: 34.5 V clamping ensures downstream 40 V-rated input capacitors and controllers remain within safe operating area during 600 W surges. |
Use Scenario: LIN bus or sensor analog input lines in BCM subjected to ESD and battery reversal spikes. IC Role / Device Role / Timing Role: Point-of-entry TVS on each signal line to absorb ±8 kV contact ESD (IEC 61000-4-2) and suppress coupling from adjacent 12 V circuits. Use Value: 0.2 μA leakage at 22 V prevents signal offset errors in 12-bit ADC front-ends while enabling fast response to sub-100 ns transients. |
| Telecom Interface Surge Protection | Consumer Appliance Motor Drive Feedback |
Use Scenario: RS-485 transceiver power and data lines in outdoor base station equipment facing lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on VCC and differential pair, coordinated with secondary GDT or polymer PTC for staged protection. Use Value: 4000 W (8/20 μs) rating handles induced surges from nearby strikes; unidirectional polarity avoids interfering with DC bias on half-duplex lines. |
Use Scenario: Hall-effect sensor feedback lines in washing machine motor control board, subject to commutation noise and EFT bursts. IC Role / Device Role / Timing Role: Localized TVS at sensor connector to prevent latch-up or damage to microcontroller GPIOs monitoring rotor position. Use Value: SMA package footprint allows placement within 2 mm of connector; 120 °C/W RθJA permits operation in sealed plastic housing at 70 °C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J22CA-E3/5A | Bidirectional variant; symmetric clamping for AC-coupled or floating lines; VBR = ±24.4–26.9 V; same VC and PPPM ratings. | Required where line polarity reverses (e.g., telecom tip/ring, differential buses); not suitable for DC-biased single-rail protection. | Select SMA6J22CA-E3/5A only if bidirectional clamping is needed; SMA6J22A-E3/5A is optimal for fixed-polarity 24 V systems. |
| SMCJ22A-E3/57T | Larger SMC (DO-214AB) package; higher 1500 W (10/1000 μs) PPPM; same VWM/VBR/VC specs; RθJA = 35 °C/W vs. 120 °C/W. | Better thermal performance and surge margin for high-reliability industrial drives; requires larger PCB area and different land pattern. | Choose SMCJ22A-E3/57T when 1500 W surge rating or lower thermal resistance is mandatory; SMA6J22A-E3/5A fits space-constrained designs. |
Compared with SMA6J22CA-E3/5A and SMCJ22A-E3/57T, the SMA6J22A-E3/5A provides optimal balance of compact SMA footprint, 600 W surge capability, and cost-effective unidirectional protection for fixed-rail 24 V systems-without requiring PCB redesign or sacrificing clamping precision.
Availability
SMA6J22A-E3/5A is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, telecom interface protection, and consumer appliance motor control requiring stable component supply and long-term obsolescence management.
Supply support for SMA6J22A-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 and industrial-grade performance.
The SMA6JxxA series is part of Vishay's Transient Voltage Suppressor family, engineered specifically for robust, low-profile surge protection in space-constrained industrial and automotive electronics.
FAQ
What is the maximum clamping voltage of the SMA6J22A-E3/5A under a 10/1000 μs surge?
The SMA6J22A-E3/5A 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 and guaranteed per the Vishay datasheet (Document Number: 89460), and reflects actual device behavior-not a calculated estimate. The SMA6J22A-E3/5A maintains this clamping performance across its specified operating temperature range.
Is the SMA6J22A-E3/5A RoHS-compliant and suitable for lead-free reflow?
Yes, the SMA6J22A-E3/5A carries the "E3" suffix, indicating full RoHS compliance and qualification for lead-free reflow soldering with a maximum peak temperature of 260 °C per J-STD-020. Its matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability standards, and it is rated MSL level 1-meaning no floor life limitation or bake requirement prior to assembly. The SMA6J22A-E3/5A is certified for industrial-grade use.
How does the SMA6J22A-E3/5A differ from the SMA6J22CA-E3/5A?
The SMA6J22A-E3/5A is unidirectional, while the SMA6J22CA-E3/5A is bidirectional-meaning the latter clamps both positive and negative transients symmetrically. Their VBR, VC, and PPPM ratings are identical, but the SMA6J22A-E3/5A must be oriented with cathode toward the protected line, whereas the SMA6J22CA-E3/5A has no polarity constraint. The SMA6J22A-E3/5A is appropriate for DC-biased rails like 24 V power inputs.
What is the thermal resistance and power derating behavior of the SMA6J22A-E3/5A?
The SMA6J22A-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. Its power dissipation (PD) is rated at 4.0 W at TA = 50 °C and derates linearly above that temperature per Figure 2 in the datasheet. At 100 °C ambient, PD drops to approximately 2.0 W. This derating must be applied in sealed enclosures or high-ambient environments.
Can the SMA6J22A-E3/5A protect against ESD per IEC 61000-4-2?
Yes-the SMA6J22A-E3/5A is capable of absorbing IEC 61000-4-2 Level 4 (±8 kV contact, ±15 kV air) ESD events due to its fast response time (< 1 ns) and low clamping voltage. While optimized for longer 10/1000 μs transients (e.g., inductive switching), its avalanche structure inherently handles nanosecond-scale ESD pulses. For dedicated ESD-only protection, lower-capacitance TVS arrays may be preferred-but the SMA6J22A-E3/5A remains effective in hybrid surge+ESD scenarios.
SMA6J22A-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:
- 40.4V
- Current - Peak Pulse (10/1000µs):
- 89A (8/20µs)
- Power - Peak Pulse:
- 4000W (4kW)
- 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-E3/5A FAQ
1.How can I place an order for SMA6J22A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J22A-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 SMA6J22A-E3/5A reliable?
The price and inventory of SMA6J22A-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 SMA6J22A-E3/5A is usually 5 days.
3.What payment methods are accepted for SMA6J22A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J22A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J22A-E3/5A?
SMA6J22A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J22A-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 SMA6J22A-E3/5A?
For technical support, including SMA6J22A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J22A-E3/5A requirements.
6.How does Aetrix verify that SMA6J22A-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMA6J22A-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 SMA6J22A-E3/5A meets industry standards.
7.What is the process for return or replacement of SMA6J22A-E3/5A?
All SMA6J22A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J22A-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 SMA6J22A-E3/5A part is unused and in its original packaging.
Return procedure for SMA6J22A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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