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Vishay General Semiconductor - Diodes Division SMA5J8.5CA-E3/61
- Part No.:
- SMA5J8.5CA-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J8.5CA-E3/61.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,174
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Product details
Overview
SMA5J8.5CA-E3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal or power 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 maximum clamping voltage (VC) at 10 A peak pulse current, and 500 W peak pulse power rating with 10/1000 μs waveform - used to protect automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the SMA5J8.5CA-E3/61 datasheet, SMA5J8.5CA-E3/61 pinout, SMA5J8.5CA-E3/61 application, or SMA5J8.5CA-E3/61 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM ≈ 1.69), AEC-Q101 qualification eligibility (via HE3 suffix), RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical electrical characteristics forward and reverse - enabling protection of AC-coupled or differential signal lines without polarity concerns. Its glass-passivated junction ensures stable leakage performance and fast response (<1 ns), while low incremental surge resistance supports effective energy diversion during ESD or load-switching transients.
The device is rated for 150 °C maximum junction temperature and meets MSL Level 1 per J-STD-020 (260 °C peak reflow). Thermal resistance is 80 °C/W junction-to-ambient (on recommended pad layout) and 25 °C/W junction-to-lead, supporting reliable operation under repetitive surge conditions when properly mounted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse voltage before clamping begins; defines safe operating window for protected circuitry |
| VBR min/max | 9.44 V / 10.4 V at 1 mA - guaranteed breakdown threshold range ensuring consistent turn-on behavior across production lots |
| VC @ IPPM | 14.4 V at 10 A - clamping voltage under standardized 10/1000 μs surge; determines worst-case overvoltage seen by downstream ICs |
| PPPM | 500 W - peak pulse power handling with 10/1000 μs waveform; quantifies transient energy absorption capacity |
| ID @ VWM | 1.0 μA - reverse leakage at stand-off voltage; low value minimizes standby power loss and avoids false triggering |
| Package | SMA (DO-214AC) - surface-mount package with 5.28 mm × 4.50 mm footprint and 2.29 mm height; optimized for high-density PCB layouts |
| Polarity | Bidirectional - no cathode marking; symmetrical I-V curve enables use on AC, differential, or floating lines without orientation constraints |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, dimensions 5.28 mm × 4.50 mm × 2.29 mm (L × W × H), MSL Level 1, compatible with J-STD-002 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | No polarity marking; terminals are interchangeable - bidirectional operation allows either terminal to serve as input or return under transient stress |
| Case (exposed metal slug) | Thermal conduction path | Not electrically connected; provides mechanical stability and aids heat dissipation to PCB copper when mounted per recommended pad layout |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage drift over temperature and lifetime - critical for long-term reliability in automotive environments |
| Low clamping ratio (VC/VWM = 1.69) | Minimizes overvoltage exposure to protected ICs compared to alternatives with higher ratios - preserves margin for 12 V rail systems |
| 500 W peak pulse power | Supports robust immunity against ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 surge events in industrial and automotive applications |
| AEC-Q101 qualification path | HE3/HM3 variants available - enables drop-in qualification for automotive ECUs, ADAS sensors, and body control modules requiring automotive-grade components |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak - eliminates moisture sensitivity handling requirements in manufacturing |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in 12 V vehicle subsystems. IC Role / Device Role: Bidirectional clamping element placed between signal line and ground, absorbing surges up to 500 W without degradation. Use Value: Maintains signal integrity below 14.4 V clamping level during ISO 7637-2 Pulse 5a (load dump), preventing latch-up or damage to 16 V-tolerant transceivers. | Use Scenario: Safeguarding digital input channels of programmable logic controllers against field-wiring induced surges in factory automation environments. IC Role / Device Role: Transient shunt on 24 V DC input lines, triggered only during overvoltage events while presenting <1 μA leakage during normal operation. Use Value: Enables reliable operation under IEC 61000-4-4 EFT (4 kV) and IEC 61000-4-5 surge (1 kV line-earth) without derating or additional filtering stages. |
| Consumer Audio Interface Protection | Telecom Line Card Surge Suppression |
Use Scenario: Shielding analog audio paths (e.g., microphone bias lines, headphone outputs) in portable devices from ESD and cable discharge events. IC Role / Device Role: Low-capacitance bidirectional clamp placed directly at connector entry points to minimize stub length and preserve signal fidelity. Use Value: Clamps ±15 kV contact ESD (IEC 61000-4-2) within nanoseconds while adding <10 pF capacitance - avoids high-frequency attenuation in 20 kHz audio band. | Use Scenario: Front-end protection of DSL or POTS line interface circuits exposed to lightning-induced surges on outside plant wiring. IC Role / Device Role: Primary surge diverter in series with gas discharge tube (GDT) or polymer PTC, handling fast-rising transients before slower secondary protectors activate. Use Value: Withstands repeated 10/1000 μs surges up to 10 A without parameter shift - extends service life of telecom line cards in harsh outdoor deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.5CA | Lower PPPM (400 W vs. 500 W); same VWM, VBR, VC, and package | Less margin for high-energy transients like ISO 7637-2 Pulse 5a; suitable for cost-sensitive consumer designs with lower surge risk | Select SMAJ8.5CA only if system-level testing confirms 400 W rating suffices; SMA5J8.5CA-E3/61 preferred for automotive or industrial use |
| SMBJ8.5CA | Same electrical specs but SMB (DO-214AA) package - 5.28 mm × 4.50 mm footprint same width/length but 2.79 mm height (vs. 2.29 mm) | Higher thermal resistance (RθJA = 85 °C/W) and reduced board space efficiency due to taller profile | Choose SMBJ8.5CA only if existing layout accommodates taller package; SMA5J8.5CA-E3/61 offers better power density and thermal performance in constrained spaces |
Compared with SMAJ8.5CA and SMBJ8.5CA, SMA5J8.5CA-E3/61 delivers superior power density (500 W in low-profile SMA), tighter thermal management (80 °C/W RθJA), and direct path to AEC-Q101 qualification - making it the optimal choice for next-generation automotive and industrial designs demanding compact, high-reliability transient suppression.
Availability
SMA5J8.5CA-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line card surge protection requiring stable component supply, RoHS compliance, and traceable sourcing.
Supply support for SMA5J8.5CA-E3/61 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 reliability, power density, and automotive qualification.
The SMA5J series is engineered for high-energy transient suppression in space-constrained applications - targeting automotive, industrial, and telecom systems where 500 W surge handling and bidirectional symmetry are essential design requirements.
FAQ
What is the clamping voltage of the SMA5J8.5CA-E3/61 under a 10 A transient?
The SMA5J8.5CA-E3/61 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. This value is measured at TA = 25 °C on the recommended 5.0 mm × 5.0 mm copper pad layout and defines the upper voltage limit imposed on protected circuitry during surge events. The SMA5J8.5CA-E3/61 maintains this clamping performance consistently across its operating temperature range.
Is the SMA5J8.5CA-E3/61 suitable for automotive applications?
Yes - the SMA5J8.5CA-E3/61 is RoHS-compliant and part of a family qualified to AEC-Q101 when ordered with HE3 or HM3 suffixes (e.g., SMA5J8.5CAHE3_A). While the -E3/61 variant itself is commercial grade, its electrical and thermal specifications - including 150 °C TJ max, MSL Level 1, and glass-passivated junction - align with automotive environmental requirements. System-level validation is required, but the SMA5J8.5CA-E3/61 serves as the baseline for qualified automotive derivatives.
How does the bidirectional nature of the SMA5J8.5CA-E3/61 affect its PCB layout?
The SMA5J8.5CA-E3/61 has no polarity marking and identical electrical behavior in both directions, eliminating orientation constraints during placement. This simplifies PCB layout for AC-coupled, differential, or floating signal lines - no need to verify anode/cathode alignment. Layout must still follow the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad per terminal to ensure specified thermal and surge performance. The SMA5J8.5CA-E3/61's symmetrical construction supports flexible routing without compromising protection efficacy.
What is the maximum reverse leakage current of the SMA5J8.5CA-E3/61 at its stand-off voltage?
The SMA5J8.5CA-E3/61 exhibits a maximum reverse leakage current (ID) of 1.0 μA when biased at its 8.5 V stand-off voltage (VWM) and tested at TA = 25 °C. This low leakage ensures minimal impact on system power budget and avoids false triggering in high-impedance sensing circuits. Leakage remains within specification across the full operating temperature range (-55 °C to +150 °C), supporting stable performance in harsh environments where the SMA5J8.5CA-E3/61 is deployed.
Can the SMA5J8.5CA-E3/61 be used in place of a unidirectional TVS like SMA5J8.5A?
No - the SMA5J8.5CA-E3/61 is strictly bidirectional and cannot replace unidirectional types like SMA5J8.5A in DC-biased applications requiring forward conduction (e.g., power rail clamping with defined polarity). SMA5J8.5A provides forward voltage drop (~3.5 V at 25 A) and asymmetric clamping; SMA5J8.5CA-E3/61 offers symmetrical clamping with no forward conduction path. Substitution requires verifying circuit topology - bidirectional use is mandatory for AC, differential, or floating nodes, while unidirectional is required for polarized DC rails. The SMA5J8.5CA-E3/61 must be applied only where bidirectional protection is functionally appropriate.
SMA5J8.5CA-E3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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)
SMA5J8.5CA-E3/61 FAQ
1.How can I place an order for SMA5J8.5CA-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J8.5CA-E3/61 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 SMA5J8.5CA-E3/61 reliable?
The price and inventory of SMA5J8.5CA-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J8.5CA-E3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J8.5CA-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J8.5CA-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J8.5CA-E3/61?
SMA5J8.5CA-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J8.5CA-E3/61 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 SMA5J8.5CA-E3/61?
For technical support, including SMA5J8.5CA-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J8.5CA-E3/61 requirements.
6.How does Aetrix verify that SMA5J8.5CA-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J8.5CA-E3/61 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 SMA5J8.5CA-E3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J8.5CA-E3/61?
All SMA5J8.5CA-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J8.5CA-E3/61, 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 SMA5J8.5CA-E3/61 part is unused and in its original packaging.
Return procedure for SMA5J8.5CA-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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