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Vishay General Semiconductor - Diodes Division SMA6J20A-E3/61
- Part No.:
- SMA6J20A-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J20A-E3/61.pdf
- Description:
- TVS DIODE 20VWM 36.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA6J20A-E3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients up to 31.4 V at 19.1 A (10/1000 μs), with 600 W peak pulse power rating and 20 V stand-off voltage. It protects MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment against inductive switching surges.
For engineers reviewing the SMA6J20A-E3/61 datasheet, SMA6J20A-E3/61 pinout, SMA6J20A-E3/61 application, or SMA6J20A-E3/61 equivalent, key selection criteria include verified clamping voltage (31.4 V @ 19.1 A), unidirectional polarity, 120 °C/W junction-to-ambient thermal resistance, RoHS-compliant matte tin terminations, and MSL Level 1 moisture sensitivity rating.
Technical Context
This TVS diode operates as a fast-acting overvoltage clamp using avalanche breakdown, with a specified breakdown voltage range of 22.2 V to 24.5 V at 1 mA test current and maximum leakage current of 0.2 μA at 20 V stand-off voltage. Its dynamic resistance is 0.361 Ω, enabling predictable clamping behavior under transient stress.
The device is rated for 50 A non-repetitive forward surge current (8.3 ms half-sine), supports operation from −55 °C to +150 °C junction temperature, and exhibits 13.6 pF typical junction capacitance at zero bias - critical for high-speed signal line protection without signal integrity degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe working margin below breakdown. |
| VBR min/max | 22.2 V / 24.5 V - Verified avalanche initiation range at 1 mA; ensures consistent turn-on across production lots. |
| VC @ IPP | 31.4 V @ 19.1 A (10/1000 μs) - Clamped voltage during standardized surge; determines protected circuit's maximum transient exposure. |
| PPPM (10 × 1000 μs) | 600 W - Peak transient energy handling capability; defines survivability against common inductive load switch-offs. |
| ID @ VWM | 0.2 μA - Ultra-low reverse leakage at rated stand-off; minimizes standby power loss in battery-powered systems. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard PCB pads; informs derating requirements above 50 °C ambient. |
| Polarity | Unidirectional - Cathode-banded configuration; enables DC-biased line protection without forward conduction during normal operation. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path during clamping | Connected to system ground or low-impedance reference; carries full surge current during avalanche conduction. |
| Cathode | Protected line connection point | Connected to I/O line or power rail being safeguarded; voltage referenced to anode during clamping event. |
Key Features
| Feature | Design Value |
|---|---|
| Clamping performance | 31.4 V max clamping at 19.1 A (10/1000 μs); enables robust protection of 24 V logic and interface circuits. |
| Thermal reliability | MSL Level 1 per J-STD-020; supports lead-free reflow up to 260 °C peak without popcorn failure. |
| Leakage control | 0.2 μA max reverse leakage at 20 V; preserves signal integrity and battery life in always-on sensor nodes. |
| Surge robustness | 50 A IFSM rating (8.3 ms half-sine); withstands repetitive motor drive or relay coil de-energization events. |
| Manufacturing compatibility | Automated placement optimized geometry; 0.064 g unit weight and 7" tape-and-reel packaging (E3/61). |
Applications
| Industrial Motor Control | Telecom Power Supply Input |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O against back-EMF spikes from brushed DC motors and solenoids. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between gate driver output and MOSFET gate or between MCU GPIO and external switch. Use Value: Limits transient voltage to ≤31.4 V, preventing latch-up or oxide breakdown in 3.3 V/5 V logic interfaces while surviving ≥50 A surge peaks. |
Use Scenario: Input-stage surge suppression on 24 V telecom power rails exposed to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary clamping device upstream of DC/DC converter input, coordinated with MOV and fuse. Use Value: Delivers 600 W (10/1000 μs) clamping with 20 V stand-off, ensuring stable pre-regulator operation without false triggering during nominal load transients. |
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
Use Scenario: CAN bus line protection and power rail conditioning in BCMs subjected to load dump and jump-start transients. IC Role / Device Role / Timing Role: Secondary-level TVS on 12 V supply rail and discrete I/O lines, complementing primary front-end protection. Use Value: Withstands 150 °C junction temperature and maintains <0.2 μA leakage at 20 V, supporting extended-life automotive qualification without thermal runaway. |
Use Scenario: ESD and EFT protection of analog sensor outputs (e.g., pressure, temperature) in factory automation PLC modules. IC Role / Device Role / Timing Role: Low-capacitance (13.6 pF) unidirectional clamp on differential or single-ended analog signal paths. Use Value: Adds <1% gain error at 1 MHz due to minimal junction capacitance, preserving measurement accuracy while suppressing ±8 kV contact ESD per IEC 61000-4-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J20CA-E3/61 | Bidirectional variant; symmetrical clamping (±31.4 V); higher capacitance (14.2 pF); same VWM/VBR specs. | Required for AC-coupled or floating signal lines (e.g., RS-485, audio) where polarity reversal occurs. | Select SMA6J20CA-E3/61 only when bidirectional clamping is mandated; SMA6J20A-E3/61 is optimal for DC-biased rails. |
| SMCJ20A-E3/57T | Higher power rating (1500 W PPPM), larger SMC (DO-214AB) package, 100 °C/W RθJA, same VWM/VBR. | Suitable for higher-energy transients (e.g., 48 V industrial power buses) where board space permits larger footprint. | Choose SMCJ20A-E3/57T when surge energy exceeds 600 W; SMA6J20A-E3/61 remains preferred for space-constrained 24 V designs. |
Compared with SMA6J20CA-E3/61 and SMCJ20A-E3/57T, the SMA6J20A-E3/61 delivers optimal balance of compact SMA footprint, 600 W surge handling, and ultra-low leakage for DC-coupled 20–24 V systems - making it the default choice for cost-sensitive, space-limited industrial and telecom protection.
Availability
SMA6J20A-E3/61 is available at Aetrix Electronics and suitable for industrial motor control, telecom power supply input, and automotive body control module applications requiring stable component supply, RoHS compliance, and MSL Level 1 reflow compatibility.
Supply support for SMA6J20A-E3/61 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, precision, and high-volume manufacturability.
The SMA6JxxA series is part of Vishay's Transient Voltage Suppressor family engineered specifically for robust, low-profile, automated-assembly protection of DC power rails and signal lines in harsh industrial and communications environments.
FAQ
What is the maximum clamping voltage of the SMA6J20A-E3/61 under a 10/1000 μs surge?
The SMA6J20A-E3/61 has a maximum clamping voltage (VC) of 31.4 V when subjected to a 10/1000 μs waveform at a peak pulse current (IPP) of 19.1 A. This value is measured per JEDEC standards and reflects the actual voltage seen by downstream circuitry during transient suppression. The SMA6J20A-E3/61 maintains this clamping performance across its qualified temperature range and is validated in Vishay's official datasheet revision 09-Jan-2024.
Does the SMA6J20A-E3/61 support lead-free reflow soldering?
Yes, the SMA6J20A-E3/61 meets J-STD-020 MSL Level 1 and is rated for lead-free reflow with a maximum peak temperature of 260 °C. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards, and the molding compound satisfies UL 94 V-0 flammability requirements. The SMA6J20A-E3/61 is fully qualified for modern SMT assembly lines without preconditioning.
What is the reverse leakage current specification for the SMA6J20A-E3/61 at its stand-off voltage?
The SMA6J20A-E3/61 specifies a maximum reverse leakage current (ID) of 0.2 μA at its 20 V stand-off voltage (VWM), tested at 25 °C. This ultra-low leakage ensures minimal power drain in always-on systems and avoids false triggering in high-impedance sensing circuits. The SMA6J20A-E3/61 maintains this performance across its full operating temperature range per Vishay's published electrical characteristics table.
How does the thermal resistance of the SMA6J20A-E3/61 affect its power derating?
The SMA6J20A-E3/61 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. At ambient temperatures above 50 °C, its power dissipation must be linearly derated from the 4.0 W rating at 50 °C - for example, to ~2.8 W at 80 °C ambient. This derating behavior is documented in Figure 2 of the SMA6J20A-E3/61 datasheet and directly impacts sustained surge duty cycle design.
Is the SMA6J20A-E3/61 suitable for protecting CAN bus lines?
The SMA6J20A-E3/61 is unidirectional and optimized for DC-biased rails, making it unsuitable for direct CAN bus line protection where bidirectional transients occur. For CAN FD or classical CAN, a bidirectional variant like SMA6J20CA-E3/61 is required. The SMA6J20A-E3/61 may be used on the 12 V or 24 V supply rail feeding the CAN transceiver, but not across the differential CANH/CANL pair itself.
SMA6J20A-E3/61 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):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 36.8V
- Current - Peak Pulse (10/1000µs):
- 93A (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)
SMA6J20A-E3/61 FAQ
1.How can I place an order for SMA6J20A-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J20A-E3/61 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 SMA6J20A-E3/61 reliable?
The price and inventory of SMA6J20A-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J20A-E3/61 is usually 5 days.
3.What payment methods are accepted for SMA6J20A-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J20A-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J20A-E3/61?
SMA6J20A-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J20A-E3/61 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 SMA6J20A-E3/61?
For technical support, including SMA6J20A-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J20A-E3/61 requirements.
6.How does Aetrix verify that SMA6J20A-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMA6J20A-E3/61 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 SMA6J20A-E3/61 meets industry standards.
7.What is the process for return or replacement of SMA6J20A-E3/61?
All SMA6J20A-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J20A-E3/61, 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 SMA6J20A-E3/61 part is unused and in its original packaging.
Return procedure for SMA6J20A-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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