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Vishay General Semiconductor - Diodes Division SMA5J8.5AHE3/61
- Part No.:
- SMA5J8.5AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J8.5AHE3/61.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,306
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Product details
Overview
SMA5J8.5AHE3/61 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 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR at 1 mA), 14.4 V clamping voltage (VC) at 10 A peak pulse current, and 500 W peak pulse power rating (10/1000 µs waveform). It is AEC-Q101 qualified and used to protect automotive sensor interfaces and industrial control inputs from ESD and load dump transients.
For engineers reviewing the SMA5J8.5AHE3/61 datasheet, SMA5J8.5AHE3/61 pinout, SMA5J8.5AHE3/61 application, or SMA5J8.5AHE3/61 equivalent, key selection criteria include unidirectional polarity, 14.4 V clamping performance at 10 A, AEC-Q101 qualification status, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (<1 µA leakage at 8.5 V), then rapidly switches to low-impedance conduction when reverse voltage exceeds VBR, limiting transient energy to protected circuitry. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability.
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 10/1000 µs surge response meets IEC 61000-4-5 Level 4 requirements when applied with appropriate PCB layout and trace inductance management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse operating voltage before significant leakage begins; sets upper limit for safe DC bias in protected line. |
| VBR (min/max) | 9.44 V / 10.4 V at 1 mA - Confirmed breakdown range ensures predictable turn-on across production lot and temperature; guarantees clamping initiates above system nominal voltage. |
| VC @ IPPM | 14.4 V at 10 A - Clamping voltage during full-rated 500 W transient; defines worst-case overvoltage seen by downstream ICs during surge event. |
| PPPM | 500 W (10/1000 µs) - Peak surge power handling capacity; determines survivability against standardized lightning and inductive-switching transients. |
| IFSM | 40 A (8.3 ms half-sine) - Forward surge rating confirms robustness against accidental forward polarity misapplication or asymmetrical surges. |
| TJ max | 150 °C - Maximum junction temperature rating enables operation in under-hood automotive environments and high-power industrial enclosures. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to ground or lower-potential rail; must be routed with low-inductance path to handle 10 A transient current without voltage overshoot. |
| Cathode | Protected line connection / surge sink | Connected to line being protected (e.g., sensor supply or CAN bus); band-marked end; reverse-biased during normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| AEC-Q101 qualification | Validated for automotive-grade stress testing including HTOL, TC, and HAST-enables use in engine control, ADAS, and body electronics. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns; no baking required prior to assembly. |
| Low incremental surge resistance | Minimizes VC rise under high di/dt transients-critical for protecting fast-switching MOSFET gates and microcontroller I/O pins. |
Applications
| Automotive Sensor Protection | Industrial Power Input Protection |
|---|---|
Use Scenario: Protecting 5 V or 12 V analog sensor outputs (e.g., pressure, temperature) in engine bay modules from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between sensor output line and chassis ground. Use Value: Limits transient overvoltage to ≤14.4 V, preventing latch-up or gate oxide damage in downstream op-amps and ADC front-ends. | Use Scenario: Safeguarding 24 V DC input rails of PLC I/O modules against inductive kickback from solenoid switching and relay contact bounce. IC Role / Device Role / Timing Role: Primary surge clamp on main power entry point, upstream of bulk capacitor and LDO regulator. Use Value: Absorbs up to 500 W of transient energy without degradation, maintaining system uptime during factory floor electrical noise events. |
| Automotive Body Control Unit (BCU) | Telecom Interface Protection |
Use Scenario: Securing LIN bus lines and door actuator driver outputs against ESD and battery reversal transients in vehicle body electronics. IC Role / Device Role / Timing Role: Line-side TVS on bidirectional or unidirectional control signals interfacing with external harnesses. Use Value: Withstands ±15 kV contact ESD (IEC 61000-4-2) and clamps fast-rising transients within 1 ns, preserving signal integrity and MCU GPIO reliability. | Use Scenario: Protecting RS-485 transceiver data lines in base station remote units exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Secondary-level TVS on differential pair, placed after common-mode choke and before transceiver ESD diodes. Use Value: Provides 500 W surge margin beyond primary protection, enabling compliance with Telcordia GR-1089-CORE Level 3 surge immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J8.5A-E3/61 | Same electrical specs and package, but commercial-grade (non-AEC-Q101 qualified); RoHS-compliant, no halogen restriction. | Lacks automotive qualification; suitable for consumer, industrial, and telecom equipment where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive qualification requirement and environmental compliance is limited to RoHS only. |
| SMA5J8.5AHM3/61 | Halogen-free, RoHS-compliant, and AEC-Q101 qualified-identical surge ratings and thermal performance, differing only in lead finish composition. | Meets stricter material compliance (halogen-free) for automotive OEMs requiring full PPAP documentation and green material declarations. | Select when halogen-free certification is contractually required, especially for Tier 1 automotive suppliers. |
Compared with SMA5J8.5AHE3/61, the E3 variant offers identical protection performance at lower cost for non-automotive use, while HM3 adds halogen-free compliance for stringent OEM material specifications-neither is pin-compatible with alternate packages like SMB or SMC.
Availability
SMA5J8.5AHE3/61 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial power input hardening, and telecom interface surge suppression requiring stable component supply and AEC-Q101 assurance.
Supply support for SMA5J8.5AHE3/61 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, MOSFETs, and protection devices with emphasis on high-reliability and automotive-grade solutions.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained SMT designs, targeting automotive, industrial, and communications systems where robustness against repetitive surges and long-term stability are mandatory.
FAQ
What is the clamping voltage of the SMA5J8.5AHE3/61 and how is it measured?
The SMA5J8.5AHE3/61 has a maximum clamping voltage (VC) of 14.4 V at 10 A peak pulse current, tested with a 10/1000 µs waveform per IEC 61000-4-5. This value represents the worst-case voltage imposed on the protected line during full-rated surge, measured across the device terminals with specified test conditions and PCB mounting per Vishay's recommended 0.2" × 0.2" copper pad layout.
Is the SMA5J8.5AHE3/61 suitable for automotive applications?
Yes, the SMA5J8.5AHE3/61 is AEC-Q101 qualified and RoHS-compliant, making it suitable for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. Its 150 °C maximum junction temperature, MSL Level 1 rating, and glass-passivated junction support reliable operation in harsh under-hood and cabin environments.
What does the "HE3" suffix mean in SMA5J8.5AHE3/61?
The "HE3" suffix in SMA5J8.5AHE3/61 indicates RoHS-compliant construction with AEC-Q101 qualification. "H" denotes AEC-Q101 qualification, "E3" specifies RoHS-compliant matte tin plating and commercial-grade material formulation-distinct from "HM3", which adds halogen-free compliance.
How does the SMA5J8.5AHE3/61 differ from the SMA5J8.5A-E3/61?
The SMA5J8.5AHE3/61 and SMA5J8.5A-E3/61 share identical electrical parameters and SMA (DO-214AC) packaging, but differ in qualification: HE3 is AEC-Q101 qualified for automotive use, while E3 is commercial-grade only. Both are RoHS-compliant, but only HE3 carries the automotive stress-test validation required for OEM production.
What is the thermal resistance of the SMA5J8.5AHE3/61 and how does it affect layout?
The SMA5J8.5AHE3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" copper pads per Vishay's recommended layout. This value assumes minimal copper area; increasing pad size or adding thermal vias reduces RθJA, improving surge endurance during repetitive events and enabling higher ambient temperature operation.
SMA5J8.5AHE3/61 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):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 34.7A
- 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)
SMA5J8.5AHE3/61 FAQ
1.How can I place an order for SMA5J8.5AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J8.5AHE3/61 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 SMA5J8.5AHE3/61 reliable?
The price and inventory of SMA5J8.5AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J8.5AHE3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J8.5AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J8.5AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J8.5AHE3/61?
SMA5J8.5AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J8.5AHE3/61 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 SMA5J8.5AHE3/61?
For technical support, including SMA5J8.5AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J8.5AHE3/61 requirements.
6.How does Aetrix verify that SMA5J8.5AHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J8.5AHE3/61 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 SMA5J8.5AHE3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J8.5AHE3/61?
All SMA5J8.5AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J8.5AHE3/61, 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 SMA5J8.5AHE3/61 part is unused and in its original packaging.
Return procedure for SMA5J8.5AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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