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Vishay General Semiconductor - Diodes Division SMA5J20HE3/61
- Part No.:
- SMA5J20HE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J20HE3/61.pdf
- Description:
- TVS DIODE 20VWM 35.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,133
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Product details
Overview
SMA5J20HE3/61 from Vishay General Semiconductor is a high-power-density, AEC-Q101-qualified, bi-directional transient voltage suppressor (TVS) in DO-214AC (SMA) package, designed for automotive and industrial overvoltage protection. It features 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR), 500 W peak pulse power (PPPM), 15.4 A peak pulse current (IPPM), and clamps transients to ≤32.4 V at rated surge.
For engineers reviewing the SMA5J20HE3/61 datasheet, SMA5J20HE3/61 pinout, SMA5J20HE3/61 application, or SMA5J20HE3/61 equivalent, key selection criteria include AEC-Q101 qualification, bi-directional clamping capability, 500 W 10/1000 µs surge rating, DO-214AC thermal resistance (RθJA = 80 °C/W), and RoHS-compliant matte tin terminations with JESD 201 Class 2 whisker resistance.
Technical Context
This bi-directional TVS diode operates symmetrically in both polarities, with identical electrical characteristics-VBR, VWM, ID, and VC-in forward and reverse directions. Its glass-passivated junction ensures stable clamping under repetitive transients, and its low incremental surge resistance enables effective suppression of fast-rising ESD and load-dump events.
Designed for surface-mount automated placement, SMA5J20HE3/61 meets MSL Level 1 per J-STD-020 (peak reflow 260 °C) and supports operation from –55 °C to +150 °C junction temperature. The device is not polarity-marked, consistent with bi-directional construction, and requires no external biasing or control circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse voltage before clamping begins; defines operating margin for protected signal or power line. |
| VBR (min/max) | 22.2 V / 24.5 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | ≤32.4 V - Clamped voltage at 15.4 A peak pulse (10/1000 µs); determines maximum stress on downstream ICs or MOSFETs. |
| PPPM | 500 W - Peak pulse power handling capacity; validates robustness against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| ID @ VWM | ≤1.0 µA - Reverse leakage at 20 V; negligible power loss and signal integrity impact in standby or low-power systems. |
| TJ max. | +150 °C - Maximum junction temperature; supports under-hood automotive use and high-ambient industrial environments. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, bi-directional configuration with no polarity marking. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), cathode band omitted per bi-directional design.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional transient conduction path | Both terminals function identically; connects across protected line (e.g., CAN_H–CAN_L or supply–return) without orientation dependency. |
| Case (body) | Thermal and mechanical interface | DO-214AC molded body provides UL 94 V-0 flammability rating and transfers heat to PCB copper pads (0.2" × 0.2" recommended per terminal). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and accelerated life testing per stress test conditions. |
| Glass passivated junction | Ensures stable VBR and low leakage over time and temperature; prevents degradation from moisture ingress or contamination. |
| MSL Level 1 rating | Enables single-reflow assembly without pre-baking; compatible with standard SMT lines using peak profile up to 260 °C. |
| JESD 201 Class 2 whisker resistance | Matte tin plating withstands long-term thermal aging without tin whisker growth, critical for high-reliability automotive ECUs. |
Applications
| Automotive CAN Bus Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting CAN_H and CAN_L differential pair in vehicle body control modules against ISO 7637-2 load dump and ESD. IC Role / Device Role / Timing Role: Bi-directional clamping element placed directly across the bus pair, absorbing bidirectional transients without disrupting DC bias or signal integrity. Use Value: Maintains CAN compliance by limiting common-mode surge voltage to ≤32.4 V while supporting >1 Mbps data rates due to low junction capacitance (<100 pF at 0 V). | Use Scenario: Shielding analog output (4–20 mA) or digital I/O lines of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Standoff-connected TVS shunting induced surges from motor drives or relay coils before they reach sensor front-end amplifiers or ADC inputs. Use Value: Prevents sensor calibration drift or latch-up by clamping transients to <32.4 V with sub-1 ns response time, preserving measurement accuracy and system uptime. |
| DC Power Rail Protection (12 V/24 V) | Telecom Interface Port Protection |
Use Scenario: Safeguarding input stage of automotive infotainment head units or industrial HMIs powered from switched 12 V or 24 V supplies. IC Role / Device Role / Timing Role: Parallel-connected TVS across VIN–GND, activated only during overvoltage events (e.g., jump-start spikes, alternator load dump). Use Value: Withstands 500 W surges without failure and maintains <1 µA leakage at 20 V, eliminating standby power penalty and enabling direct integration upstream of LDOs or DC/DC converters. | Use Scenario: Protecting RS-485 transceiver ports in base station remote radio units exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Bi-directional clamp placed on differential pair (A/B) and common-mode line (GND reference), suppressing both differential and common-mode transients. Use Value: Delivers 500 W surge immunity per line while meeting IEC 61000-4-5 Level 4 requirements, reducing need for secondary protection stages and board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J20CA-E3/61 | Same VWM (20 V), VBR (22.2–24.5 V), PPPM (500 W), and DO-214AC package; differs only in suffix coding (E3 vs HE3) - both RoHS-compliant, but HE3 denotes AEC-Q101 qualification. | No functional difference in circuit behavior; HE3 variant adds automotive qualification evidence required for Tier 1 OEM BOMs. | Select SMA5J20HE3/61 when AEC-Q101 documentation and traceability are mandatory; otherwise SMA5J20CA-E3/61 suffices for industrial use. |
| SMCJ20CA | Higher PPPM (1500 W), larger DO-214AB (SMC) package (7.11 mm × 6.22 mm), same VWM/VBR range; RθJA ≈ 30 °C/W vs 80 °C/W for SMA5J20HE3/61. | Used where higher surge energy must be absorbed and PCB area allows larger footprint; unsuitable for space-constrained automotive modules. | Choose SMCJ20CA only if 1500 W rating is required and layout permits larger package; SMA5J20HE3/61 offers optimal power density for compact designs. |
Compared with SMA5J20CA-E3/61, SMA5J20HE3/61 provides identical electrical performance plus documented AEC-Q101 qualification, while SMCJ20CA trades smaller size for triple the surge power and lower thermal resistance-making SMA5J20HE3/61 the preferred choice for space-limited, automotive-qualified 500 W protection.
Availability
SMA5J20HE3/61 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom port protection requiring stable component supply, AEC-Q101 compliance, and high-reliability transient suppression.
Supply support for SMA5J20HE3/61 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, MOSFETs, and optoelectronics with emphasis on reliability, power efficiency, and automotive-grade validation.
The SMA5J series is engineered specifically for high-density, surface-mount transient suppression in harsh environments-targeting automotive subsystems, industrial controls, and communications infrastructure where AEC-Q101 qualification and 500 W surge capability are essential.
FAQ
What is the clamping voltage of the SMA5J20HE3/61 under full-rated surge conditions?
The SMA5J20HE3/61 clamps to a maximum of 32.4 V when subjected to its rated 15.4 A peak pulse current (IPPM) with 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 circuits during surge events. The clamping voltage remains consistent across both polarities due to its bi-directional design.
Is SMA5J20HE3/61 suitable for automotive applications requiring AEC-Q101 qualification?
Yes, SMA5J20HE3/61 is explicitly AEC-Q101 qualified, as confirmed by Vishay's documentation and the "HE3" suffix designation. It undergoes rigorous stress testing-including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing-to meet automotive reliability standards. This makes SMA5J20HE3/61 appropriate for engine control units, body electronics, and ADAS modules where qualification evidence is mandatory.
Does SMA5J20HE3/61 have polarity markings on the package?
No, SMA5J20HE3/61 does not feature polarity markings because it is a bi-directional TVS diode. Unlike uni-directional variants (e.g., SMA5J20A), which use a cathode band, the bi-directional construction means both terminals are functionally identical. This eliminates orientation concerns during placement and simplifies layout for differential or AC-coupled protection schemes.
What is the thermal resistance of SMA5J20HE3/61, and how does it affect PCB layout?
SMA5J20HE3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. This relatively high RθJA means effective heat dissipation relies heavily on adequate PCB copper area. To maintain safe junction temperatures under repeated surges, designers should maximize pad size and consider internal ground/power planes connected via multiple vias-especially in high-ambient or high-duty-cycle applications.
How does the leakage current of SMA5J20HE3/61 compare to other 20 V TVS diodes?
At its 20 V stand-off voltage (VWM), SMA5J20HE3/61 exhibits a maximum reverse leakage current (ID) of 1.0 µA at 25 °C-matching industry-leading performance for DO-214AC bi-directional TVS devices. This ultra-low leakage avoids loading sensitive analog rails or battery-backed circuits, making it preferable over alternatives with ID > 5 µA in precision sensor or low-power IoT applications where standby current budget is constrained.
SMA5J20HE3/61 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J20HE3/61 FAQ
1.How can I place an order for SMA5J20HE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J20HE3/61 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 SMA5J20HE3/61 reliable?
The price and inventory of SMA5J20HE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J20HE3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J20HE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J20HE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J20HE3/61?
SMA5J20HE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J20HE3/61 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 SMA5J20HE3/61?
For technical support, including SMA5J20HE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J20HE3/61 requirements.
6.How does Aetrix verify that SMA5J20HE3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J20HE3/61 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 SMA5J20HE3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J20HE3/61?
All SMA5J20HE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J20HE3/61, 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 SMA5J20HE3/61 part is unused and in its original packaging.
Return procedure for SMA5J20HE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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