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Vishay General Semiconductor - Diodes Division SMA5J20-E3/61
- Part No.:
- SMA5J20-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J20-E3/61.pdf
- Description:
- TVS DIODE 20VWM 35.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,968
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Product details
Overview
SMA5J20-E3/61 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for high-energy surge protection on power and signal lines. It features a 20 V standoff voltage (VWM), 22.2–24.5 V breakdown range (VBR), 32.4 V clamping voltage at 15.4 A peak pulse current (IPPM), and 500 W peak pulse power (10/1000 µs waveform), commonly deployed to protect automotive power rails and industrial sensor interfaces.
For engineers reviewing the SMA5J20-E3/61 datasheet, SMA5J20-E3/61 pinout, SMA5J20-E3/61 application, or SMA5J20-E3/61 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, RoHS-compliant matte tin terminations, MSL Level 1 rating, and thermal resistance of 80 °C/W (junction-to-ambient).
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents <1 µA leakage at 20 V, then rapidly avalanches when transients exceed VBR (min 22.2 V), limiting downstream voltage to ≤32.4 V at 15.4 A. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance.
The device is rated for -55 °C to +150 °C junction temperature, supports 40 A non-repetitive forward surge (8.3 ms half-sine), and meets J-STD-020 reflow profile with 260 °C peak. Its DO-214AC package enables automated placement and delivers 500 W surge handling in a low-profile surface-mount footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (min/max) | 22.2 V / 24.5 V - Breakdown occurs within this range at 1 mA test current; defines turn-on threshold |
| VC @ IPPM | 32.4 V - Clamped voltage seen by protected circuit during 15.4 A 10/1000 µs surge |
| PPPM | 500 W - Peak surge power dissipation capability under standardized transient waveform |
| IPPM | 15.4 A - Maximum non-repetitive peak pulse current the device safely clamps |
| TJ max. | +150 °C - Maximum allowable junction temperature for reliable long-term operation |
| RθJA | 80 °C/W - Thermal resistance from junction to ambient; informs PCB copper pad sizing requirements |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with matte tin-plated leads, cathode band marking on one end, compliant with UL 94 V-0 flammability rating and J-STD-002 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode (banded end) | Reverse-biased blocking terminal | Connected to protected line; avalanche conduction initiates here during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per stress test plan |
| Glass passivated junction | Ensures stable VBR tolerance, low leakage drift over time, and robustness against humidity and contamination |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow processes without preconditioning or dry-pack requirements |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving clamping precision |
| RoHS-compliant E3 suffix | Meets EU Directive 2011/65/EU; includes JESD201 Class 1A whisker resistance for high-reliability solder joints |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs and body control modules from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and ground to clamp surges above 20 V. Use Value: Limits transient voltage to ≤32.4 V during 15.4 A surges, preventing damage to downstream regulators and microcontrollers. |
Use Scenario: Safeguarding analog input pins of industrial PLC analog I/O modules from field-wiring induced transients. IC Role / Device Role / Timing Role: Standoff-rated TVS on 4–20 mA or 0–10 V signal paths, absorbing energy from cable coupling or ESD. Use Value: Maintains signal integrity by suppressing >22.2 V transients while adding <1 µA leakage at 20 V operating point. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Securing 24 V or 48 V telecom power inputs against lightning-induced surges and AC line cross-coupling. IC Role / Device Role / Timing Role: Primary-level TVS on bulk DC input, coordinated with upstream fuses and secondary filtering. Use Value: Withstands 500 W peak pulse power and clamps to 32.4 V, enabling compact front-end protection without derating. |
Use Scenario: Shielding MCU GPIOs and gate drivers in white-goods motor inverters from inductive kickback during MOSFET switching. IC Role / Device Role / Timing Role: Localized unidirectional TVS across motor driver supply rails and logic-level signal lines. Use Value: Fast response time and low Rsurge ensure clamping occurs before sensitive logic thresholds are exceeded. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J20AHE3/61 | AEC-Q101 qualified variant with identical electrical specs; HE3 suffix denotes enhanced whisker resistance (JESD201 Class 2) | Required for automotive safety-critical modules where extended whisker reliability is mandated | Select SMA5J20AHE3/61 when AEC-Q101 compliance is contractually required beyond baseline qualification |
| SMC5J20A-E3/57T | Same VWM/VBR/VC specs but in larger DO-214AB (SMC) package; higher IPPM (21.6 A) and lower RθJA (50 °C/W) | Better suited for high-power industrial systems requiring >500 W surge margin or improved thermal dissipation | Choose SMC5J20A-E3/57T when board space allows and thermal performance or surge headroom exceeds SMA5J20-E3/61 limits |
Compared with SMA5J20-E3/61, the HE3 variant adds whisker robustness without electrical change, while the SMC5J20A offers higher surge current capacity and better thermal performance at the cost of larger footprint-both serve distinct reliability or power-class requirements rather than drop-in replacement roles.
Availability
SMA5J20-E3/61 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power input protection requiring stable component supply, RoHS compliance, and AEC-Q101 traceability.
Supply support for SMA5J20-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, power efficiency, and automotive-grade validation.
The SMA5J series is engineered for high-density surface-mount transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robust 500 W surge handling and AEC-Q101 compliance are mandatory.
FAQ
What is the polarity configuration of the SMA5J20-E3/61?
The SMA5J20-E3/61 is a unidirectional TVS diode: its cathode is marked by a band on the DO-214AC package body, and it conducts only when the cathode is at higher potential than the anode. This configuration blocks reverse current during normal operation and clamps positive transients on the cathode-connected line. The SMA5J20-E3/61 must be oriented correctly in-circuit to avoid unintended conduction.
Does the SMA5J20-E3/61 meet automotive qualification standards?
Yes, the SMA5J20-E3/61 is AEC-Q101 qualified per the Vishay datasheet revision 24-Oct-12, confirming compliance with stress tests including high-temperature reverse bias, temperature cycling, and surge endurance. While the E3 suffix indicates RoHS compliance and JESD201 Class 1A whisker resistance, full AEC-Q101 validation applies to the base SMA5J20A part number family, which includes SMA5J20-E3/61.
What is the maximum clamping voltage of the SMA5J20-E3/61 under surge conditions?
The SMA5J20-E3/61 has a maximum clamping voltage (VC) of 32.4 V at its rated peak pulse current (IPPM) of 15.4 A, measured using the standardized 10/1000 µs double-exponential waveform. This value represents the highest voltage the protected circuit will experience during a full-rated surge event, ensuring downstream components remain within safe operating limits.
How does the thermal resistance of the SMA5J20-E3/61 affect PCB layout?
The SMA5J20-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain TJ ≤ 150 °C under repeated 500 W surges, designers must provide adequate copper area and consider airflow or adjacent heat sources. Reducing pad size significantly increases RθJA, risking thermal runaway during sustained surge duty cycles.
Is the SMA5J20-E3/61 compatible with lead-free reflow soldering?
Yes, the SMA5J20-E3/61 is rated for MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C, making it fully compatible with standard lead-free soldering processes. Its matte tin-plated leads meet J-STD-002 and JESD22-B102 solderability requirements, and no moisture sensitivity baking is required prior to assembly.
SMA5J20-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 35.8V
- Current - Peak Pulse (10/1000µs):
- 14A
- Power - Peak Pulse:
- 500W
- 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)
SMA5J20-E3/61 FAQ
1.How can I place an order for SMA5J20-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J20-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 SMA5J20-E3/61 reliable?
The price and inventory of SMA5J20-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 SMA5J20-E3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J20-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J20-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J20-E3/61?
SMA5J20-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J20-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 SMA5J20-E3/61?
For technical support, including SMA5J20-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J20-E3/61 requirements.
6.How does Aetrix verify that SMA5J20-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J20-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 SMA5J20-E3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J20-E3/61?
All SMA5J20-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J20-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 SMA5J20-E3/61 part is unused and in its original packaging.
Return procedure for SMA5J20-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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