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Vishay General Semiconductor - Diodes Division SMA5J20AHE3/61
- Part No.:
- SMA5J20AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J20AHE3/61.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,340
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Product details
Overview
SMA5J20AHE3/61 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, 500 W peak pulse power rating, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMA5J20AHE3/61 datasheet, SMA5J20AHE3/61 pinout, SMA5J20AHE3/61 application, or SMA5J20AHE3/61 equivalent, key selection criteria include clamping performance under 10/1000 µs transients, junction temperature derating above 25 °C, unidirectional polarity marking, 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, responding within picoseconds to transient overvoltages induced by inductive switching or ESD events. Its glass-passivated junction ensures stable leakage (<1.0 µA at 20 V) and low incremental surge resistance, enabling consistent clamping across repetitive surges.
The device is rated for 150 °C maximum junction temperature and exhibits 80 °C/W junction-to-ambient thermal resistance when mounted per recommended pad layout. Its unidirectional configuration requires cathode-band orientation during PCB layout, and it supports surge currents up to 40 A (8.3 ms half-sine) without degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected line. |
| VBR min/max | 22.2 V / 24.5 V at 1 mA - Verified breakdown threshold range; ensures predictable turn-on across production lot and temperature. |
| VC @ IPPM | 32.4 V at 15.4 A (10/1000 µs) - Clamping voltage limits downstream IC stress; critical for MOSFET gate or microcontroller I/O protection. |
| PPPM | 500 W - Peak pulse power handling capacity; determines survivability against ISO 7637-2 Pulse 1/2a/5a or IEC 61000-4-5 surges. |
| IFSM | 40 A (8.3 ms half-sine) - Forward surge rating enables robust protection of DC power rails subject to load dump events. |
| TJ max | 150 °C - Maximum junction temperature; sets thermal design boundary for sustained surge duty cycles and ambient derating. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads. Cathode identified by black band; polarity must be observed during layout to ensure correct unidirectional clamping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path during transient event. |
| Cathode | High-side input terminal | Connected to protected line (e.g., 24 V rail or sensor output); marked with black band for orientation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1 µA) over lifetime and humidity exposure. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without preconditioning; supports high-yield SMT assembly. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD >15 kV), improving clamping fidelity. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in body control modules against load dump and jump-start transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between battery rail and DC-DC input, clamping surges within 1 ns. Use Value: Limits voltage to ≤32.4 V during 15.4 A transients, preventing damage to downstream PMICs and microcontrollers. |
Use Scenario: Safeguarding analog outputs of pressure or temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: Low-capacitance TVS on 4–20 mA or 0–10 V signal lines, suppressing EFT bursts and cable discharge events. Use Value: Maintains signal integrity with <1 µA leakage at 20 V, while clamping fast transients without affecting loop accuracy. |
| Consumer Power Adapter Input Stage | Telecom DC Feeder Line Protection |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters powering USB-C PD devices. IC Role / Device Role / Timing Role: Standoff-rated TVS on +5 V/9 V/15 V output rails, activated only during fault conditions. Use Value: Withstands repeated 500 W surges without parameter shift, ensuring long-term reliability in compact adapter designs. |
Use Scenario: DC power feed protection in remote radio units powered via 48 V PoE-like infrastructure. IC Role / Device Role / Timing Role: Primary-line TVS on telecom equipment input, coordinated with upstream fuses and MOVs. Use Value: Provides precise 20 V standoff and 32.4 V clamping to protect sensitive RF front-end ICs from lightning-induced surges. |
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-E3/61 | No AEC-Q101 qualification; commercial grade only; identical electrical specs and package. | Not suitable for automotive ECUs or ADAS modules requiring automotive qualification. | Select SMA5J20AHE3/61 when AEC-Q101 compliance is mandatory; otherwise SMA5J20A-E3/61 reduces cost in industrial/commercial designs. |
| SMCJ20AHE3/61 | Same VWM/VC, but higher PPPM = 1500 W in larger SMC (DO-214AB) package; 2× footprint area. | Used where higher surge energy (e.g., IEC 61000-4-5 Level 4) demands greater dissipation capability. | Choose SMA5J20AHE3/61 for space-constrained boards needing 500 W; upgrade to SMCJ20AHE3/61 only if system-level surge testing exceeds 500 W. |
Compared with SMA5J20A-E3/61, the SMA5J20AHE3/61 adds automotive qualification without altering electrical behavior; versus SMCJ20AHE3/61, it trades surge capacity for 40 % smaller PCB area and lower thermal mass-critical for dense automotive modules.
Availability
SMA5J20AHE3/61 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power feeders requiring stable component supply, AEC-Q101 traceability, and RoHS-compliant manufacturing.
Supply support for SMA5J20AHE3/61 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, and protection devices with emphasis on reliability, power density, and automotive qualification.
The SMA5J series was developed to deliver high-power transient suppression in ultra-compact surface-mount packages for next-generation automotive and industrial systems demanding AEC-Q101 compliance and automated assembly compatibility.
FAQ
What is the clamping voltage of the SMA5J20AHE3/61 under standard test conditions?
The SMA5J20AHE3/61 has a maximum clamping voltage (VC) of 32.4 V when subjected to a 10/1000 µs waveform at its rated peak pulse current of 15.4 A. This value is measured at TA = 25 °C with the device mounted on 5.0 mm × 5.0 mm copper pads per the datasheet's recommended layout. The SMA5J20AHE3/61 maintains this clamping performance across its operational temperature range, making it suitable for protecting sensitive 24 V automotive electronics.
Is the SMA5J20AHE3/61 suitable for bidirectional transient protection?
No, the SMA5J20AHE3/61 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the SMA5J20CA variant. Using SMA5J20AHE3/61 on AC-coupled or symmetrical signal lines would result in forward conduction during negative transients, potentially damaging the device or circuit. Always verify polarity alignment before placing the SMA5J20AHE3/61 in design.
Does the SMA5J20AHE3/61 require special PCB layout considerations?
Yes-the SMA5J20AHE3/61 must be mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve its rated 500 W peak pulse power and thermal performance. Narrow traces or insufficient copper reduce heat dissipation and cause premature failure under surge. The cathode band must align with the protected line net, and the anode must connect directly to a low-impedance ground plane. These constraints are essential for reliable operation of the SMA5J20AHE3/61.
How does the AEC-Q101 qualification impact the use of SMA5J20AHE3/61 in automotive designs?
The AEC-Q101 qualification confirms that the SMA5J20AHE3/61 has passed accelerated stress tests-including temperature cycling, high-temperature reverse bias, and ESD-required for automotive under-hood and cabin applications. This certification allows direct use in production ECUs without additional component-level qualification. Designers can rely on the SMA5J20AHE3/61 for functional safety paths where transient immunity is critical, such as in ADAS power domains or infotainment system inputs.
What is the maximum junction temperature rating for the SMA5J20AHE3/61?
The SMA5J20AHE3/61 has a maximum junction temperature (TJ) rating of +150 °C, with derating applied above TA = 25 °C per Figure 2 in the datasheet. Its typical junction-to-ambient thermal resistance is 80 °C/W when mounted on specified copper pads. This TJ limit defines the upper boundary for thermal design-engineers must ensure steady-state power dissipation plus transient heating stays below 150 °C to prevent parametric shift or failure of the SMA5J20AHE3/61.
SMA5J20AHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J20AHE3/61 FAQ
1.How can I place an order for SMA5J20AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J20AHE3/61 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 SMA5J20AHE3/61 reliable?
The price and inventory of SMA5J20AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J20AHE3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J20AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J20AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J20AHE3/61?
SMA5J20AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J20AHE3/61 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 SMA5J20AHE3/61?
For technical support, including SMA5J20AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J20AHE3/61 requirements.
6.How does Aetrix verify that SMA5J20AHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J20AHE3/61 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 SMA5J20AHE3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J20AHE3/61?
All SMA5J20AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J20AHE3/61, 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 SMA5J20AHE3/61 part is unused and in its original packaging.
Return procedure for SMA5J20AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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