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Vishay General Semiconductor - Diodes Division SMA5J20A-E3/61
- Part No.:
- SMA5J20A-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J20A-E3/61.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,755
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Product details
Overview
SMA5J20A-E3/61 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on power and signal lines. It features a 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR), 32.4 V clamping voltage at 15.4 A peak pulse current (IPPM), and 500 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the SMA5J20A-E3/61 datasheet, SMA5J20A-E3/61 pinout, SMA5J20A-E3/61 application, or SMA5J20A-E3/61 equivalent, key selection criteria include clamping performance under 15.4 A surge, thermal resistance (RθJA = 80 °C/W), unidirectional polarity with cathode band marking, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR (22.2–24.5 V), it avalanches to limit transient energy across protected circuitry. Its glass-passivated junction ensures stable leakage (<1.0 µA at 20 V) and fast response time (<1 ns), critical for safeguarding sensitive inputs against ESD and inductive switching spikes.
Rated for -55 °C to +150 °C junction temperature, it supports automotive-grade reliability when ordered with HE3 suffix (AEC-Q101 qualified); the -E3/61 variant is commercial-grade, RoHS-compliant, supplied in 7" tape-and-reel (1800 pcs), and meets J-STD-020 MSL Level 1 (260 °C peak reflow).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - maximum continuous reverse operating voltage before conduction begins; defines safe DC/AC bias margin for protected line. |
| VBR (min/max) | 22.2 V / 24.5 V - breakdown threshold range at 1 mA test current; determines earliest clamping onset during transients. |
| VC @ IPPM | 32.4 V at 15.4 A - clamped voltage during 10/1000 µs surge; directly limits stress on downstream MOSFET or IC input. |
| PPPM | 500 W - peak pulse power handling capability; enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω). |
| RθJA | 80 °C/W - junction-to-ambient thermal resistance; requires ≥5.0 mm × 5.0 mm copper pad per terminal for rated power dissipation. |
| Polarity | Unidirectional - cathode marked by band; blocks forward current above ~3.5 V (VF at 25 A), conducts only in reverse avalanche. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; carries forward current up to 40 A (IFSM) during fault. |
| Cathode (banded end) | Avalanche conduction terminal | Connected to higher-potential side; initiates clamping when reverse voltage exceeds VBR; marks polarity for correct PCB orientation. |
Key Features
| Feature | Design Value |
|---|---|
| Low incremental surge resistance | Enables tighter clamping (VC = 32.4 V) at 15.4 A, reducing voltage overshoot on protected ICs. |
| Glass passivated chip junction | Ensures stable VBR tolerance and low leakage (<1.0 µA) over temperature and lifetime, critical for long-term reliability. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; compatible with high-volume automated SMT assembly. |
| 500 W peak pulse power | Supports IEC 61000-4-5 surge immunity up to 4 kV (2 Ω source impedance) without degradation. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V CAN bus power rails and microcontroller supply inputs against load dump (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VBAT and GND, clamping surges before they reach LDOs or MCU VCC pins. Use Value: Limits transient voltage to ≤32.4 V at 15.4 A, preventing latch-up or gate oxide damage in downstream 3.3 V/5 V logic. | Use Scenario: Safeguarding analog front-end inputs of pressure/temperature sensors in PLC modules exposed to relay coil flyback and EFT bursts. IC Role / Device Role / Timing Role: TVS mounted at connector entry point, shunting induced surges on signal lines (e.g., 4–20 mA loop or RS-485) to ground. Use Value: Sub-1 ns response and 32.4 V clamping prevent sensor ADC saturation and preserve measurement integrity during 1 kV EFT events. |
| Consumer Power Adapter Output Protection | Telecom DC-DC Converter Input Protection |
Use Scenario: Securing 19–20 V output of laptop AC/DC adapters against overvoltage faults and external surges entering via USB-C PD negotiation. IC Role / Device Role / Timing Role: Unidirectional TVS placed after secondary-side rectifier, clamping output rail to safe level before polymer capacitor and load switch. Use Value: Withstands 500 W pulses without failure, maintaining adapter compliance to UL 62368-1 surge requirements while avoiding crowbar shutdown. | Use Scenario: Protecting primary-side input of isolated DC-DC converters in base station power modules subjected to lightning-induced surges on -48 V telecom distribution lines. IC Role / Device Role / Timing Role: TVS installed across converter input terminals, absorbing energy from 10/1000 µs surges before upstream fuse or filter components. Use Value: 20 V VWM aligns with nominal -48 V system derating; 32.4 V clamping prevents MOSFET avalanche failure in active rectification stage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J20A-M3/61 | Halogen-free, RoHS-compliant variant with identical electrical specs and SMA package; same thermal and surge ratings. | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU public infrastructure projects). | Choose SMA5J20A-M3/61 when halogen-free bill-of-materials is required; otherwise SMA5J20A-E3/61 offers standard RoHS compliance at broader distributor availability. |
| SMA6J20A-E3/61 | 600 W PPPM rating (vs. 500 W), same VWM/VBR/VC, but higher IPPM (18.5 A) and slightly higher RθJA (85 °C/W). | Provides higher surge margin for designs facing repeated or severe transients (e.g., outdoor industrial gateways); requires same PCB layout but may need thermal validation at full rating. | Choose SMA6J20A-E3/61 when 600 W surge headroom is needed; SMA5J20A-E3/61 remains optimal for cost-sensitive, space-constrained 500 W applications. |
Compared with SMA5J20A-M3/61, the SMA5J20A-E3/61 offers identical protection performance with standard RoHS compliance, while SMA6J20A-E3/61 delivers 20 % higher pulse power at minor thermal trade-off - enabling design flexibility across commercial, industrial, and halogen-free compliance tiers.
Availability
SMA5J20A-E3/61 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and consumer power adapter output protection requiring stable component supply, consistent lead-time visibility, and traceable sourcing.
Supply support for SMA5J20A-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 density, and AEC-Q101 qualification.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained SMT applications, targeting automotive, industrial, and telecom systems where robust 500 W surge handling and low-profile packaging are essential.
FAQ
What is the clamping voltage of the SMA5J20A-E3/61 under maximum rated surge current?
The SMA5J20A-E3/61 has a maximum clamping voltage (VC) of 32.4 V when subjected to its rated peak pulse current (IPPM) of 15.4 A using a 10/1000 µs waveform. This value is measured at the device terminals under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMA5J20A-E3/61 maintains this clamping performance across its operational temperature range (-55 °C to +150 °C) with minimal derating up to 125 °C.
Is the SMA5J20A-E3/61 suitable for automotive applications requiring AEC-Q101 qualification?
The SMA5J20A-E3/61 itself is a commercial-grade, RoHS-compliant variant and is not AEC-Q101 qualified. However, Vishay offers the functionally identical SMA5J20AHE3_A/H variant (with HE3 suffix) that is fully AEC-Q101 qualified for automotive use. Engineers must specify the HE3 or HM3 suffix for automotive-grade qualification; the SMA5J20A-E3/61 remains appropriate for industrial and consumer applications where AEC-Q101 is not mandated.
What is the recommended PCB pad layout for optimal thermal and surge performance of the SMA5J20A-E3/61?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad for each terminal of the SMA5J20A-E3/61 to achieve its rated 500 W peak pulse power and thermal resistance (RθJA = 80 °C/W). These pads must be directly connected to internal or external ground/power planes with multiple vias to enhance heat spreading. Reduced pad area increases junction temperature during surge events and may cause premature failure or parameter shift. The SMA5J20A-E3/61 datasheet provides exact dimensional drawings for the DO-214AC outline and mounting footprint.
How does the unidirectional configuration of the SMA5J20A-E3/61 affect its circuit placement and functionality?
The SMA5J20A-E3/61 is unidirectional, meaning it conducts only in reverse bias above its breakdown voltage and blocks forward current up to ~3.5 V (VF at 25 A). Its cathode is marked by a band, and it must be oriented with the banded end toward the higher-potential node (e.g., VBAT or signal line) and anode toward ground or lower potential. This configuration protects against negative-going transients on positive rails and avoids forward conduction during normal operation - unlike bidirectional variants, it does not suppress symmetrical surges on AC or differential lines.
What is the maximum reverse leakage current of the SMA5J20A-E3/61 at its rated stand-off voltage?
The SMA5J20A-E3/61 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its rated stand-off voltage (VWM) of 20 V and ambient temperature of 25 °C. This low leakage ensures minimal power loss and signal interference in always-on circuits such as battery-backed sensors or always-powered communication interfaces. Leakage remains within specification up to +85 °C; at maximum junction temperature (+150 °C), leakage may increase but stays below 100 µA per Vishay's characterization data for the SMA5J family.
SMA5J20A-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:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 15.4A
- 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)
SMA5J20A-E3/61 FAQ
1.How can I place an order for SMA5J20A-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J20A-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 SMA5J20A-E3/61 reliable?
The price and inventory of SMA5J20A-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 SMA5J20A-E3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J20A-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J20A-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J20A-E3/61?
SMA5J20A-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J20A-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 SMA5J20A-E3/61?
For technical support, including SMA5J20A-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J20A-E3/61 requirements.
6.How does Aetrix verify that SMA5J20A-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J20A-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 SMA5J20A-E3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J20A-E3/61?
All SMA5J20A-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J20A-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 SMA5J20A-E3/61 part is unused and in its original packaging.
Return procedure for SMA5J20A-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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