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Vishay General Semiconductor - Diodes Division SMA5J8.5C-E3/5A
- Part No.:
- SMA5J8.5C-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J8.5C-E3/5A.pdf
- Description:
- TVS DIODE 8.5VWM 15.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA5J8.5C-E3/5A from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for robust overvoltage protection on signal and power lines. It features a 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown range (VBR), 14.4 V clamping voltage (VC) at 10 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J8.5C-E3/5A datasheet, SMA5J8.5C-E3/5A pinout, SMA5J8.5C-E3/5A application, or SMA5J8.5C-E3/5A equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bi-directional TVS diode operates symmetrically in both polarities, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), while low incremental surge resistance supports effective energy diversion during ESD and lightning-induced transients.
The device is rated for continuous operation from −55 °C to +150 °C junction temperature, with thermal resistance of 80 °C/W (junction-to-ambient) and 25 °C/W (junction-to-lead). It meets J-STD-020 reflow profile (260 °C peak) and JESD201 Class 1A whisker testing when supplied with E3 suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum reverse stand-off voltage before significant conduction begins; defines operating margin below clamping threshold |
| VBR (min/max) | 9.44 V / 10.4 V - breakdown occurs within this range at 1 mA test current; ensures predictable turn-on across production lot |
| VC @ IPPM | 14.4 V at 10 A - clamping voltage under 10/1000 µs surge; limits downstream voltage stress during transient events |
| PPPM | 500 W - peak pulse power handling capability; enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) |
| ID @ VWM | <1.0 µA - ultra-low reverse leakage at rated stand-off; preserves signal integrity in high-impedance sensor circuits |
| TJ max. | +150 °C - maximum junction temperature; supports under-hood automotive and industrial ambient conditions |
| MSL Level | Level 1 per J-STD-020 - no floor life limitation; suitable for standard SMT assembly without dry pack or baking |
Pinout & Package
DO-214AC (SMA) surface-mount package: molded epoxy case with matte tin-plated leads, 5.28 mm × 4.50 mm footprint, 2.29 mm height, cathode band omitted for bi-directional types. Compliant with UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction | No polarity marking; terminals interchangeable; provides identical clamping in either direction |
| Lead 1 / Lead 2 | Connection to PCB copper pad | Each lead mounted on 5.0 mm × 5.0 mm copper pad per datasheet recommendation for thermal and surge current handling |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded sensor outputs without polarity concerns |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure |
| Low Rsurge | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a), improving system immunity |
| MSL Level 1 & JESD201 Class 1A | Supports direct placement into high-volume SMT lines without moisture sensitivity handling or whisker mitigation steps |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine bay or chassis modules exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Transient voltage suppressor placed directly at connector entry point to shunt surge energy before reaching precision ADC or signal conditioner IC. Use Value: Clamps transients to ≤14.4 V while maintaining <1.0 µA leakage at 8.5 V, preserving sensor accuracy and enabling compliance with ISO 16750-2. | Use Scenario: Safeguarding digital input/output pins of PLC modules, motor drives, and HMI controllers connected to field wiring subject to lightning-induced surges. IC Role / Device Role / Timing Role: Bi-directional TVS placed between signal line and ground to absorb ±1 kV/500 Ω IEC 61000-4-5 surges without polarity-dependent layout. Use Value: Delivers 500 W peak pulse power handling in compact DO-214AC package, reducing board space vs. discrete Zener+capacitor solutions. |
| Consumer USB/Display Port | Telecom Line Interface |
Use Scenario: ESD and surge protection for USB 2.0 data lines (D+/D−) and DisplayPort auxiliary channels in laptops and docking stations. IC Role / Device Role / Timing Role: Low-capacitance bi-directional clamp placed adjacent to connector to limit ESD voltage to <15 V during ±8 kV contact discharge (IEC 61000-4-2). Use Value: Sub-1 µA leakage at 8.5 V prevents DC loading on high-speed data lines; fast response (<1 ns) avoids signal distortion. | Use Scenario: Overvoltage protection on telephone line interface circuits (e.g., SLIC front-end) in VoIP gateways and PBX systems. IC Role / Device Role / Timing Role: Primary surge protector on tip/ring lines, coordinated with gas discharge tube (GDT) for multi-stage protection architecture. Use Value: Symmetrical clamping ensures equal protection on both conductors; 14.4 V clamping compatible with telecom IC absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J8.5CA-E3/5A | Identical electrical specs and package; CA suffix explicitly denotes bi-directional version per Vishay naming convention (C = bi-directional, A = standard grade) | No functional difference; SMA5J8.5C-E3/5A and SMA5J8.5CA-E3/5A refer to same device per Vishay documentation (CA is canonical suffix) | Select SMA5J8.5CA-E3/5A if ordering system requires explicit 'CA' suffix for bi-directional identification |
| SMCJ8.5CA | Same VWM/VC but in larger DO-214AB (SMC) package; higher thermal mass (RθJA = 35 °C/W vs. 80 °C/W); 1500 W PPPM | Better suited for higher-energy surges (e.g., IEC 61000-4-5 Level 5); requires larger PCB area and different pad layout | Choose SMCJ8.5CA only when surge energy exceeds 500 W capability and board space allows larger footprint |
Compared with SMA5J8.5C-E3/5A, SMA5J8.5CA-E3/5A is functionally identical and interchangeable, while SMCJ8.5CA offers higher power handling at the cost of size and thermal design complexity - making SMA5J8.5C-E3/5A optimal for space-constrained, AEC-Q101-compliant 500 W protection.
Availability
SMA5J8.5C-E3/5A is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and consumer port-level ESD protection requiring stable component supply and full traceability.
Supply support for SMA5J8.5C-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, MOSFETs, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The SMA5J series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 compliance and robust surge immunity are mandatory.
FAQ
What does the "C" suffix in SMA5J8.5C-E3/5A indicate?
The "C" suffix in SMA5J8.5C-E3/5A explicitly denotes a bi-directional configuration, meaning the device provides symmetrical transient voltage suppression in both forward and reverse polarities. This is confirmed in Vishay's datasheet revision 24-Oct-12, which states "For bi-directional devices use CA suffix (e.g. SMA5J40CA)" and clarifies that electrical characteristics apply in both directions. The SMA5J8.5C-E3/5A functions identically to SMA5J8.5CA-E3/5A.
Is SMA5J8.5C-E3/5A qualified for automotive use?
Yes, SMA5J8.5C-E3/5A is AEC-Q101 qualified, as documented in the Vishay datasheet (Document Number: 88875, Revision: 24-Oct-12) under Mechanical Data and Ratings sections. This qualification covers stress tests including temperature cycling, humidity bias, and mechanical shock - validating its suitability for under-hood and chassis-mounted automotive electronics such as sensor modules and body control units.
What is the clamping voltage of SMA5J8.5C-E3/5A at its rated peak pulse current?
The clamping voltage (VC) of SMA5J8.5C-E3/5A is 14.4 V at 10 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is specified in the Electrical Characteristics table on page 2 of the Vishay datasheet and represents the maximum voltage seen across the device during a defined surge event - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Does SMA5J8.5C-E3/5A have polarity markings on the package?
No, SMA5J8.5C-E3/5A does not have polarity markings such as a cathode band because it is a bi-directional TVS diode. As stated in the Vishay datasheet: "no marking on bi-directional types." The device's symmetrical construction means either terminal may be connected to line or ground, simplifying PCB layout for AC-coupled or floating signal paths.
What is the moisture sensitivity level (MSL) of SMA5J8.5C-E3/5A?
SMA5J8.5C-E3/5A meets MSL Level 1 per J-STD-020, with a maximum lead finish reflow peak temperature of 260 °C. This is confirmed in the Features section of the Vishay datasheet and eliminates the need for dry pack storage or baking prior to SMT assembly - supporting direct use in high-throughput manufacturing environments without floor life restrictions.
SMA5J8.5C-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J8.5C-E3/5A FAQ
1.How can I place an order for SMA5J8.5C-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J8.5C-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 SMA5J8.5C-E3/5A reliable?
The price and inventory of SMA5J8.5C-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 SMA5J8.5C-E3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J8.5C-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J8.5C-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J8.5C-E3/5A?
SMA5J8.5C-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J8.5C-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 SMA5J8.5C-E3/5A?
For technical support, including SMA5J8.5C-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J8.5C-E3/5A requirements.
6.How does Aetrix verify that SMA5J8.5C-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J8.5C-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 SMA5J8.5C-E3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J8.5C-E3/5A?
All SMA5J8.5C-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J8.5C-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 SMA5J8.5C-E3/5A part is unused and in its original packaging.
Return procedure for SMA5J8.5C-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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