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Taiwan Semiconductor Corporation SMA6J22A
- Part No.:
- SMA6J22A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J22A.pdf
- Description:
- TVS DIODE 22VWM 34.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,353
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Product details
Overview
SMA6J22A from Taiwan Semiconductor is a 600W surface-mount transient voltage suppressor (TVS) diode with a working standoff voltage of 22 V, breakdown voltage range 24.4–26.9 V at 1 mA, and clamping voltage of 34.5 V at 17.4 A peak pulse current under 10/1000 µs waveform-designed for surge protection in DC/DC converters and automotive power modules.
For engineers reviewing the SMA6J22A datasheet, SMA6J22A pinout, SMA6J22A application, or SMA6J22A equivalent, key selection criteria include its DO-214AC (SMA) package compatibility, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, 175°C max junction temperature, and verified clamping performance at rated surge current.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-1 ps response time and stable breakdown characteristics across -55°C to +175°C operating range. Its single-die configuration in DO-214AC package supports automated placement and meets JESD201 Class 2 whisker resistance.
The device delivers 600 W peak pulse power per 10/1000 µs waveform with 1.0 µA max reverse leakage at 22 V and 34.5 V clamping voltage at 17.4 A-enabling robust protection against ESD, load dump, and inductive switching transients in 24 V automotive and industrial power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR @ IT=1 mA | 24.4–26.9 V - Verified breakdown threshold ensuring predictable turn-on during overvoltage events |
| VC @ IPPM=17.4 A | 34.5 V - Clamped voltage limiting downstream circuit stress during 10/1000 µs surge |
| PPPM | 600 W - Peak pulse power handling capability per standard 10/1000 µs waveform |
| IR @ VWM | 1.0 µA - Low leakage preserves efficiency in always-on 24 V monitoring circuits |
| TJ Range | -55°C to +175°C - Enables deployment in under-hood automotive and high-temp industrial environments |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode-indicating band; matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance; moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 24 V rail); cathode band marks this terminal on package body |
Key Features
| Feature | Design Value |
|---|---|
| Clamping voltage stability | 34.5 V at 17.4 A ensures consistent overvoltage limiting without thermal runaway |
| Glass-passivated junction | Enables reliable operation at 175°C junction temperature and long-term reliability in humid environments |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load disconnect), Pulse 2a/2b (battery interruption), and Pulse 3a/3b (switching transients) |
| Low-profile DO-214AC footprint | 0.060 g mass and standardized pad layout support high-density PCB layouts and reflow compatibility |
Applications
| Automotive Power Distribution | Industrial DC/DC Converters |
|---|---|
Use Scenario: Protecting 24 V supply lines in body control modules against load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery rail and downstream regulator input. Use Value: Clamps transients to ≤34.5 V while sustaining 600 W peak power, preventing damage to LDOs and microcontrollers. | Use Scenario: Safeguarding isolated flyback converter secondary-side rectifiers from reflected primary-side switching spikes. IC Role / Device Role / Timing Role: Transient suppression on output rail prior to post-regulation filtering. Use Value: Sub-1 ps response ensures clamping activation before sensitive MOSFETs or optocouplers experience overstress. |
| LED Driver Power Input | Telecom Power Interface |
Use Scenario: Guarding constant-current LED drivers in streetlight systems against lightning-induced surges on 24–48 V input. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main DC input before bulk capacitor and controller IC. Use Value: 22 V working voltage matches nominal 24 V system; 34.5 V clamping avoids triggering downstream OVP circuits prematurely. | Use Scenario: Surge protection on -48 V telecom power feed lines exposed to induced transients in central office cabinets. IC Role / Device Role / Timing Role: Reverse-biased TVS on negative rail referenced to chassis ground. Use Value: 175°C rating supports operation in sealed, fanless enclosures where ambient exceeds 85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J22CA | Bidirectional variant; symmetric clamping for AC-coupled or floating-rail use cases | Required where differential or bipolar transients occur (e.g., RS-485 data lines) | Select SMA6J22CA only if bidirectional protection is needed; SMA6J22A is optimal for unidirectional 24 V rail protection |
| SMC6J22A | Larger DO-214AB (SMC) package; higher thermal mass but 2.5× PCB area | Preferred in high-reliability aerospace or military designs requiring derated power margin | Choose SMC6J22A when board space permits and steady-state power dissipation >4 W must be managed |
Compared with SMA6J22CA and SMC6J22A, the SMA6J22A provides optimal balance of low-profile DO-214AC footprint, 22 V system alignment, and 600 W surge capacity-making it the preferred choice for space-constrained 24 V automotive and industrial power inputs where unidirectional clamping suffices.
Availability
SMA6J22A is available at Aetrix Electronics and suitable for automotive power distribution, industrial DC/DC converters, and LED driver power input applications requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for SMA6J22A 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.
The SMA6JxxA series belongs to TSC's transient voltage suppressor product line, engineered specifically for high-energy surge immunity in 12–48 V power systems subject to ISO 7637-2 and IEC 61000-4-5 stress profiles.
FAQ
What is the maximum clamping voltage of the SMA6J22A under standard test conditions?
The SMA6J22A exhibits a maximum clamping voltage (VC) of 34.5 V when subjected to a 10/1000 µs waveform with a peak pulse current (IPPM) of 17.4 A. This value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during surge events. The SMA6J22A maintains this clamping performance consistently across its specified operating temperature range.
Is the SMA6J22A suitable for automotive applications requiring ISO 7637-2 compliance?
Yes, the SMA6J22A is explicitly validated to meet ISO 7637-2 for Pulses 1, 2a, 2b, 3a, and 3b-covering critical automotive transients including load dump, battery disconnection, and inductive switching noise. Its 22 V working voltage aligns with 24 V vehicle systems, and its 175°C junction rating supports under-hood deployment. The SMA6J22A datasheet confirms this compliance without derating.
What package type does the SMA6J22A use, and what are its assembly advantages?
The SMA6J22A uses the DO-214AC (SMA) surface-mount package, featuring matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance. Its low profile and standardized footprint enable high-speed automated placement and compatibility with standard reflow profiles. The 0.060 g mass minimizes mechanical stress during thermal cycling in automotive applications.
How does the SMA6J22A differ from the SMA6J22CA variant?
The SMA6J22A is unidirectional, providing clamping only for positive transients relative to cathode, whereas the SMA6J22CA is bidirectional with symmetrical breakdown in both polarities. The SMA6J22A has a 22 V working standoff voltage and is optimized for 24 V DC rails; the SMA6J22CA suits AC-coupled or floating interfaces like RS-485. Pinout and package are identical, but electrical behavior differs fundamentally.
What is the peak pulse power rating and test waveform for the SMA6J22A?
The SMA6J22A is rated for 600 W peak pulse power using the industry-standard 10/1000 µs double-exponential waveform defined by R.E.A. and IEC 61000-4-5. This rating is non-repetitive and applies at TA = 25°C. Derating is required above 25°C per the pulse derating curve in the official datasheet, with full 600 W capability maintained up to ~70°C ambient depending on PCB copper area.
SMA6J22A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- SMA6J
- 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 ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA6J22A FAQ
1.How can I place an order for SMA6J22A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J22A 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 reliable?
The price and inventory of SMA6J22A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J22A is usually 5 days.
3.What payment methods are accepted for SMA6J22A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J22A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J22A?
SMA6J22A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J22A 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?
For technical support, including SMA6J22A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J22A requirements.
6.How does Aetrix verify that SMA6J22A is sourced from the original manufacturer or authorized distributors?
All SMA6J22A 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 meets industry standards.
7.What is the process for return or replacement of SMA6J22A?
All SMA6J22A units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J22A, 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 part is unused and in its original packaging.
Return procedure for SMA6J22A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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