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Vishay General Semiconductor - Diodes Division SMA5J8.5HE3/5A
- Part No.:
- SMA5J8.5HE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J8.5HE3/5A.pdf
- Description:
- TVS DIODE 8.5VWM 15.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,212
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Product details
Overview
SMA5J8.5HE3/5A from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, designed for high-energy surge protection on DC power rails and signal lines. It features 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR), 14.4 V clamping voltage at 10 A peak pulse current (IPPM), and 500 W peak pulse power (PPPM) with 10/1000 µs waveform. Used in automotive power supply inputs to protect microcontrollers and CAN transceivers from load dump and ISO 7637-2 transients.
For engineers reviewing the SMA5J8.5HE3/5A datasheet, SMA5J8.5HE3/5A pinout, SMA5J8.5HE3/5A application, or SMA5J8.5HE3/5A equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, RoHS-compliant HE3 suffix (JESD 201 Class 2 whisker test), 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 crowbar device triggered by reverse-biased avalanche breakdown. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling consistent clamping performance under repetitive 10/1000 µs surges up to 500 W.
Designed for surface-mount use in DO-214AC, it delivers thermal resistance of 25 °C/W (junction-to-lead) and 80 °C/W (junction-to-ambient), supporting reliable operation at TJ = −55 °C to +150 °C. The cathode band marking confirms unidirectional polarity, and its 1.0 µA max reverse leakage at VWM ensures minimal standby power loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse operating voltage before clamping begins; sets minimum system rail margin for protected circuitry. |
| VBR min/max | 9.44 V / 10.4 V - Breakdown occurs within this range at 1 mA test current; defines threshold accuracy for transient detection. |
| VC @ IPPM | 14.4 V - Clamped voltage at 10 A peak pulse current; determines maximum stress imposed on downstream ICs during surge. |
| PPPM | 500 W - Peak pulse power handling with 10/1000 µs waveform; quantifies single-event energy absorption capability. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments without derating below 125 °C ambient. |
| Package | DO-214AC (SMA) - Standardized surface-mount outline with 5.28 mm × 4.50 mm footprint and 2.29 mm height; compatible with IPC-7351B land patterns. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; required for powertrain and body electronics. |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with two coplanar leads, cathode band marking on one end. Matte tin-plated terminals meet J-STD-002 solderability and JESD 22-B102 thermal shock requirements. Molding compound complies with UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential node; conducts during forward surge (e.g., IFSM = 40 A, 8.3 ms half-sine). |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 12 V rail); initiates breakdown when reverse voltage exceeds VBR, shunting surge current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS power supplies, ensuring long-term reliability under thermal and mechanical stress. |
| Glass passivated junction | Provides stable VBR over lifetime and temperature, minimizing drift during repeated surge events and enabling precise clamping tolerance (±5%). |
| Low profile DO-214AC package | Enables high-density PCB layouts in space-constrained modules such as infotainment head units and battery management systems. |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow soldering without moisture sensitivity concerns; eliminates pre-bake requirement for standard SMT assembly lines. |
| JESD 201 Class 2 whisker resistance | HE3 suffix guarantees robustness against tin whisker growth in high-reliability automotive systems operating >10 years at elevated temperatures. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Protecting 12 V power input of an automotive body control module (BCM) against ISO 7637-2 Pulse 5a (load dump) and Pulse 1/2a (inductive switching). IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery rail and DC-DC converter input. Use Value: Limits transient voltage to ≤14.4 V during 500 W surges, preventing latch-up or damage to downstream PMICs and microcontrollers rated for 16 V absolute max. | Use Scenario: Shielding analog output (0–5 V) of a pressure sensor in factory automation equipment from ESD and relay coil flyback. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF) clamping diode on sensor output trace, referenced to local ground. Use Value: Maintains signal integrity with <1.0 µA leakage at 8.5 V, while clamping 8 kV contact ESD per IEC 61000-4-2 to safe levels for ADC front-end protection. |
| Telecom DC Power Feeding | Consumer USB Port Overvoltage Guard |
Use Scenario: Safeguarding PoE-powered network switch DC input (48 V nominal) from accidental 60 V surges during hot-swap or lightning-induced coupling. IC Role / Device Role / Timing Role: Primary-level TVS on main DC feed, upstream of bulk capacitor and primary-side controller. Use Value: Absorbs 500 W pulses without degradation, leveraging 150 °C TJ rating to sustain operation in sealed enclosures with limited airflow. | Use Scenario: Preventing damage to USB-C port controllers during adapter plug-in events where miswired chargers apply 20 V instead of 5 V. IC Role / Device Role / Timing Role: Standoff-rated clamp on VBUS line, sized to survive repeated 10 A surges without parametric shift. Use Value: Ensures compliance with USB PD 3.1 fault protection requirements using a single discrete device with known clamping behavior and AEC-Q101 traceability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J8.5A-E3/5A | Same electrical specs but commercial-grade (non-AEC-Q101); HE3 suffix adds JESD 201 Class 2 whisker resistance not present in E3. | Not qualified for automotive under-hood use; suitable for industrial or consumer applications with lower reliability demands. | Select SMA5J8.5HE3/5A when AEC-Q101 compliance and enhanced whisker resistance are mandatory for OEM production. |
| SMC5J8.5AHE3 | Same VWM/VBR/VC but in larger DO-214AB (SMC) package; higher thermal mass yields lower RθJA (35 °C/W vs. 80 °C/W) and higher IFSM (100 A vs. 40 A). | Better suited for high-current surge environments (e.g., alternator load dump) where PCB space allows larger footprint. | Choose SMC5J8.5AHE3 only if layout permits DO-214AB and system-level surge currents exceed 40 A half-sine rating of SMA5J8.5HE3/5A. |
Compared with SMA5J8.5A-E3/5A, SMA5J8.5HE3/5A adds automotive qualification and whisker resistance without sacrificing clamping performance; versus SMC5J8.5AHE3, it trades thermal robustness for compact size-critical for dense automotive ECUs where board area is constrained.
Availability
SMA5J8.5HE3/5A is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power feeding systems requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMA5J8.5HE3/5A 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, high-power-density solutions.
The SMA5J series is engineered for automotive-grade transient suppression, delivering robust 500 W surge handling in compact DO-214AC packages with AEC-Q101 validation and extended temperature operation.
FAQ
What is the maximum clamping voltage of the SMA5J8.5HE3/5A at its rated peak pulse current?
The SMA5J8.5HE3/5A has a maximum clamping voltage (VC) of 14.4 V at 10 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMA5J8.5HE3/5A maintains this clamping performance across its full operating temperature range of −55 °C to +150 °C.
Is the SMA5J8.5HE3/5A suitable for automotive applications?
Yes, the SMA5J8.5HE3/5A is AEC-Q101 qualified and specifically designed for automotive use. Its HE3 suffix indicates compliance with JESD 201 Class 2 whisker testing, and it operates reliably from −55 °C to +150 °C junction temperature. The SMA5J8.5HE3/5A is commonly deployed in body control modules, infotainment systems, and ADAS power supplies where ISO 7637-2 transient immunity is required.
What does the 'HE3' suffix mean in SMA5J8.5HE3/5A?
The 'HE3' suffix in SMA5J8.5HE3/5A denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. Unlike the 'E3' suffix (commercial grade), 'HE3' confirms automotive-grade reliability testing including temperature cycling, highly accelerated life testing, and tin whisker mitigation-critical for long-life automotive deployments. The SMA5J8.5HE3/5A meets all these requirements per Vishay document 88875.
How does the SMA5J8.5HE3/5A differ from the SMA5J8.5A-E3/5A?
The SMA5J8.5HE3/5A and SMA5J8.5A-E3/5A share identical electrical parameters (VWM = 8.5 V, VBR = 9.44–10.4 V, VC = 14.4 V), but differ in qualification: SMA5J8.5HE3/5A is AEC-Q101 qualified and passes JESD 201 Class 2 whisker testing, whereas SMA5J8.5A-E3/5A is commercial-grade only. Both use DO-214AC packaging, but the SMA5J8.5HE3/5A is specified for automotive under-hood environments.
What is the recommended PCB pad layout for SMA5J8.5HE3/5A?
Vishay specifies mounting the SMA5J8.5HE3/5A on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 500 W peak pulse power. The DO-214AC outline requires 4.93 mm × 4.50 mm land pattern with 2.54 mm center-to-center lead spacing. Thermal vias under pads improve heat dissipation, especially critical for sustained surge duty cycles in automotive applications using the SMA5J8.5HE3/5A.
SMA5J8.5HE3/5A 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):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 15.9V
- Current - Peak Pulse (10/1000µs):
- 31.4A
- 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)
SMA5J8.5HE3/5A FAQ
1.How can I place an order for SMA5J8.5HE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J8.5HE3/5A 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 SMA5J8.5HE3/5A reliable?
The price and inventory of SMA5J8.5HE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J8.5HE3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J8.5HE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J8.5HE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J8.5HE3/5A?
SMA5J8.5HE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J8.5HE3/5A 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 SMA5J8.5HE3/5A?
For technical support, including SMA5J8.5HE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J8.5HE3/5A requirements.
6.How does Aetrix verify that SMA5J8.5HE3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J8.5HE3/5A 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 SMA5J8.5HE3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J8.5HE3/5A?
All SMA5J8.5HE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J8.5HE3/5A, 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 SMA5J8.5HE3/5A part is unused and in its original packaging.
Return procedure for SMA5J8.5HE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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