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Vishay General Semiconductor - Diodes Division SMA5J8.5A-E3/5A
- Part No.:
- SMA5J8.5A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J8.5A-E3/5A.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA5J8.5A-E3/5A 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 with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces against inductive switching transients in automotive and industrial control systems.
For engineers reviewing the SMA5J8.5A-E3/5A datasheet, SMA5J8.5A-E3/5A pinout, SMA5J8.5A-E3/5A application, or SMA5J8.5A-E3/5A equivalent, key selection considerations include clamping performance under 10 A surge, thermal resistance (RθJA = 80 °C/W), RoHS-compliant matte tin plating, AEC-Q101 qualification eligibility (via HE3 suffix), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM = 8.5 V, it avalanches into low-impedance conduction to limit transient energy. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance, enabling sub-nanosecond response to ESD and lightning-induced surges.
Rated for -55 °C to +150 °C junction temperature, it delivers 500 W peak pulse power under standardized 10/1000 µs waveform per ANSI/IEEE C62.35, with derating above 25 °C per Fig. 2. The SMA (DO-214AC) package supports surface-mount reflow (MSL Level 1, 260 °C peak) and meets UL 94 V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 8.5 V - maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 9.44–10.4 V at 1 mA - guaranteed avalanche initiation range; ensures predictable turn-on during transients |
| VC (Clamping Voltage) | 14.4 V at IPPM = 10 A - peak voltage seen by protected circuit during worst-case 500 W surge |
| PPPM (Peak Pulse Power) | 500 W - energy-handling capacity for 10/1000 µs waveform; determines survivability of common industrial surges |
| IPPM (Peak Pulse Current) | 10 A - maximum non-repetitive surge current supported at rated clamping voltage |
| RθJA (Junction-to-Ambient) | 80 °C/W - thermal resistance defining temperature rise under sustained power dissipation |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with cathode band marking and 0.064 g unit weight |
Pinout & Package
SMA5J8.5A-E3/5A uses the SMA (DO-214AC) package: a molded plastic case with two coplanar leads, cathode identified by a band at one end. Leads are matte tin plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker test requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / low-side reference | Connected to ground or lower-potential rail in unidirectional clamp configuration |
| Cathode (banded end) | Reverse-biased surge path / clamping node | Connected to protected line; conducts avalanche current to anode during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMA package | Enables compact PCB layout and compatibility with standard SMT pick-and-place equipment |
| Glass-passivated junction | Ensures stable VBR tolerance, low leakage (<1.0 µA at VWM), and long-term reliability under thermal cycling |
| 500 W peak pulse power | Provides robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V supply rails |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; peak temperature up to 260 °C |
| AEC-Q101 qualification path | Supports automotive-grade sourcing via HE3/HM3 suffix variants (e.g., SMA5J8.5AHE3_A/I) |
Applications
| Automotive Body Control Module | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting microcontroller GPIO and CAN transceiver power rails from load-dump and inductive kickback in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VCC and GND to clamp transients before they reach sensitive logic. Use Value: Limits voltage to ≤14.4 V during 10 A surge, preventing latch-up or gate oxide damage in 3.3 V/5 V MCUs and transceivers. |
Use Scenario: Safeguarding 24 V digital input channels of programmable logic controllers against field-wiring surges and relay contact bounce. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted upstream of optocoupler input to absorb >500 W transients without degrading signal integrity. Use Value: Maintains 8.5 V VWM margin above nominal 24 V supply while clamping fast-rising spikes within 1 ns response window. |
| Consumer Appliance Motor Drive | Telecom Power Supply Front-End |
Use Scenario: Suppressing back-EMF from brushed DC motors in washing machines and HVAC blowers connected to MCU-based motor drivers. IC Role / Device Role / Timing Role: Unidirectional TVS across motor terminals or H-bridge supply rails to divert inductive energy away from MOSFETs. Use Value: Withstands 40 A IFSM single-half-sine surge and clamps at 14.4 V, preserving MOSFET VDS rating during commutation events. |
Use Scenario: Secondary-side transient suppression on 48 V telecom power distribution boards exposed to lightning-induced surges on Ethernet or PoE lines. IC Role / Device Role / Timing Role: Primary-level TVS on DC input bus to reduce stress on downstream DC-DC converters and PMICs. Use Value: Delivers 500 W pulse handling with RθJA = 80 °C/W, enabling reliable operation without heatsinking in confined 1U chassis environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J8.0A-E3/5A | Lower VWM = 8.0 V; VBR = 8.89–9.83 V; VC = 13.6 V at 50 A | Better suited for tighter 8 V system margins; higher IPPM but same PPPM | Select when design requires lower clamping onset and higher surge current headroom at reduced standoff. |
| SMA5J9.0A-E3/5A | Higher VWM = 9.0 V; VBR = 10.0–11.1 V; VC = 15.4 V at 5.0 A | Preferred for 9 V nominal rails; lower IPPM reflects higher clamping voltage trade-off | Choose for systems with wider voltage tolerance where 15.4 V clamping remains within protected device limits. |
Compared with SMA5J8.0A-E3/5A and SMA5J9.0A-E3/5A, the SMA5J8.5A-E3/5A offers optimal balance for 8.5 V nominal supplies - delivering 14.4 V clamping at 10 A while maintaining sufficient margin above typical 12 V automotive or industrial rail noise floors.
Availability
SMA5J8.5A-E3/5A is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, and consumer appliance motor drive circuits requiring stable component supply, RoHS compliance, and SMT-ready packaging.
Supply support for SMA5J8.5A-E3/5A 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, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The SMA5J series is part of Vishay's TRANSZORB® TVS platform, engineered for high-power-density transient suppression in space-constrained, high-reliability applications across automotive, industrial, and telecom infrastructure.
FAQ
What is the maximum clamping voltage of the SMA5J8.5A-E3/5A under specified test conditions?
The SMA5J8.5A-E3/5A has a maximum clamping voltage (VC) of 14.4 V when subjected to a 10 A peak pulse current with a 10/1000 µs waveform at TA = 25 °C. This value is measured per ANSI/IEEE C62.35 and represents the upper voltage limit imposed on protected circuitry during worst-case surge events. The SMA5J8.5A-E3/5A maintains this clamping performance across its full operating temperature range with appropriate derating.
Is the SMA5J8.5A-E3/5A suitable for automotive applications?
The SMA5J8.5A-E3/5A itself is commercial-grade (E3 suffix), but Vishay offers AEC-Q101 qualified versions under HE3 and HM3 suffixes (e.g., SMA5J8.5AHE3_A/I). These qualified variants undergo extended stress testing for temperature cycling, humidity, and mechanical shock - making them suitable for automotive body control, lighting, and infotainment systems. The SMA5J8.5A-E3/5A shares identical electrical and thermal characteristics with those qualified variants.
What does the "-E3/5A" suffix indicate in SMA5J8.5A-E3/5A?
The "-E3" denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads. The "/5A" specifies packaging in 13-inch diameter plastic tape and reel, containing 7500 units per reel - optimized for high-volume SMT assembly. This contrasts with "/61", which indicates 7-inch reels of 1800 units. Both formats comply with J-STD-002 solderability and JESD 201 Class 2 whisker resistance standards.
How does the SMA5J8.5A-E3/5A compare to SMAJ8.5A in terms of power rating and package?
The SMA5J8.5A-E3/5A is rated for 500 W peak pulse power in the SMA (DO-214AC) package, whereas the SMAJ8.5A is a 400 W device in the same footprint. Both share identical pinout, thermal resistance (RθJA = 80 °C/W), and mounting pad requirements, but the SMA5J8.5A-E3/5A provides 25 % higher surge energy handling - critical for designs targeting IEC 61000-4-5 Level 4 immunity without increasing board area.
What is the reverse leakage current specification for SMA5J8.5A-E3/5A at its rated stand-off voltage?
At VWM = 8.5 V and TA = 25 °C, the SMA5J8.5A-E3/5A exhibits a maximum reverse leakage current (ID) of 1.0 µA. This low leakage ensures minimal power loss in standby mode and prevents false triggering in high-impedance sensing circuits. Leakage remains below 5.0 µA up to 125 °C, supporting reliable operation in under-hood or industrial enclosure environments.
SMA5J8.5A-E3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J8.5A-E3/5A FAQ
1.How can I place an order for SMA5J8.5A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J8.5A-E3/5A 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 SMA5J8.5A-E3/5A reliable?
The price and inventory of SMA5J8.5A-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J8.5A-E3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J8.5A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J8.5A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J8.5A-E3/5A?
SMA5J8.5A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J8.5A-E3/5A 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 SMA5J8.5A-E3/5A?
For technical support, including SMA5J8.5A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J8.5A-E3/5A requirements.
6.How does Aetrix verify that SMA5J8.5A-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J8.5A-E3/5A 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 SMA5J8.5A-E3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J8.5A-E3/5A?
All SMA5J8.5A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J8.5A-E3/5A, 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 SMA5J8.5A-E3/5A part is unused and in its original packaging.
Return procedure for SMA5J8.5A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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