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Vishay General Semiconductor - Diodes Division SMB8J17CA-E3/52
- Part No.:
- SMB8J17CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J17CA-E3/52.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMB8J17CA-E3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. It features a 17 V stand-off voltage (VWM), 29.0 A peak pulse current (IPPM) at 10/1000 µs, 27.6 V clamping voltage (VC), and 800 W peak pulse power (PPPM). It is AEC-Q101 qualified and used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J17CA-E3/52 datasheet, SMB8J17CA-E3/52 pinout, SMB8J17CA-E3/52 application, or SMB8J17CA-E3/52 equivalent, key selection criteria include bidirectional clamping capability, 17 V working voltage compatibility with 24 V systems, thermal resistance (RθJA = 72 °C/W), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within <1 ps to transients induced by inductive switching or ESD events. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM), while the bidirectional configuration enables symmetrical clamping on AC-coupled or differential lines without polarity sensitivity.
The device complies with ANSI/IEEE C62.35 surge standards and is rated for -55 °C to +150 °C operating junction temperature. Its MSL Level 1 rating (260 °C peak reflow) and matte tin-plated leads support robust automated assembly in high-reliability production environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping begins; matches 24 V nominal bus systems with safety margin. |
| VBR (min/max) | 18.9 V / 20.9 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on under surge conditions. |
| VC @ IPPM | 27.6 V - Clamping voltage at 29.0 A peak pulse current; limits downstream IC stress during 10/1000 µs transients. |
| PPPM | 800 W - Peak pulse power handling per 10/1000 µs waveform; supports IEC 61000-4-5 Level 3 (1 kV/42 Ω) surges. |
| ID @ VWM | <1.0 µA - Reverse leakage at 17 V; minimizes standby power loss and avoids false triggering in high-impedance circuits. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or industrial enclosures. |
| RθJA | 72 °C/W - Thermal resistance junction-to-ambient on standard 0.2" × 0.2" copper pads; informs PCB thermal design for sustained surge duty. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals serve identically as clamping nodes; no cathode band - enables placement without orientation check. |
| Case (body) | Thermal and mechanical interface | Plastic body with UL 94 V-0 rating; transfers heat to PCB copper pads (recommended 5.0 mm × 5.0 mm per terminal). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails. |
| Glass-passivated junction | Ensures stable VBR over lifetime and improved resistance to humidity-induced parameter drift. |
| MSL Level 1 (260 °C) | Supports lead-free reflow without popcorn effect or delamination; compatible with standard SMT lines. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a), improving system immunity. |
| Bidirectional symmetry | Enables single-device protection of AC-coupled data lines (e.g., CAN FD, LIN, RS-485) without external polarity management. |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
|
Use Scenario: Protecting 12 V/24 V supply and signal lines of wheel speed, pressure, or temperature sensors exposed to load dump and inductive kickback. IC Role / Device Role / Timing Role: Shunt-type transient clamp placed at connector entry point, diverting surge energy to ground before reaching ASIC or MCU input pins. Use Value: Maintains signal integrity during ISO 16750-2 load dump (up to 35 V, 100 ms) and ISO 7637-2 pulses, preventing latch-up or permanent damage to sensor front-end circuitry. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers against field wiring surges and ESD events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input terminals, coordinated with series current-limiting resistors and filtering capacitors. Use Value: Limits transient voltage to ≤27.6 V during 1 kV/42 Ω IEC 61000-4-5 surges, preserving ADC accuracy and avoiding input stage saturation or burnout. |
| Telecom Line Interface | Consumer Appliance Motor Control |
|
Use Scenario: Protecting Ethernet PHY power and MDI lines in industrial gateways subjected to lightning-induced surges on PoE or data cables. IC Role / Device Role / Timing Role: Secondary-level TVS on isolated DC-DC bias rails and common-mode choke outputs, complementing primary gas discharge tube (GDT) protection. Use Value: Responds within picoseconds to clamp fast-rising transients (e.g., IEC 61000-4-4 EFT bursts), reducing stress on magnetics and PHY ICs without affecting 100BASE-TX signal integrity. |
Use Scenario: Shielding microcontroller GPIOs and gate drivers in washing machine or HVAC motor inverters from back-EMF spikes generated by brushed or BLDC motors. IC Role / Device Role / Timing Role: Localized clamping device mounted adjacent to motor driver ICs and optocouplers on control board edge connectors. Use Value: Absorbs repetitive 800 W surges (10/1000 µs) without degradation, enabling >100,000-cycle reliability in high-durability white goods applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17CA-E3/52 | Unidirectional variant with identical VWM (17 V), VC (27.6 V), and PPPM (1000 W); higher IPPM (36.2 A) but lacks bidirectional symmetry. | Requires polarity-aware layout; unsuitable for AC or differential lines without additional components. | Select when protecting unidirectional DC rails where higher surge margin is prioritized over layout flexibility. |
| SMCJ17CA-E3/52 | Larger SMC (DO-214AB) package; same VWM and VC, but higher PPPM (1500 W) and IPPM (61.0 A); RθJA = 35 °C/W vs. 72 °C/W. | Better thermal performance and surge capacity, but occupies ~2.5× PCB area; not drop-in compatible due to footprint mismatch. | Choose for high-energy industrial environments where space permits and derating for repeated surges is critical. |
Compared with SMBJ17CA-E3/52 and SMCJ17CA-E3/52, SMB8J17CA-E3/52 offers optimal balance of bidirectional functionality, AEC-Q101 compliance, and compact SMB footprint-making it preferred for space-constrained automotive and industrial signal-line protection where polarity-agnostic clamping is required.
Availability
SMB8J17CA-E3/52 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, and telecom line interface designs requiring stable component supply, RoHS-compliant manufacturing, and AEC-Q101 traceability.
Supply support for SMB8J17CA-E3/52 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, efficiency, and application-specific optimization.
The SMB8JxxCA series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, bidirectional surge suppression in automotive and industrial environments where space, thermal constraints, and AEC-Q101 compliance are critical.
FAQ
What is the clamping voltage of SMB8J17CA-E3/52 at its rated peak pulse current?
The SMB8J17CA-E3/52 has a maximum clamping voltage (VC) of 27.6 V at its specified peak pulse current (IPPM) of 29.0 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream circuitry remains below safe voltage thresholds during standardized surge events. The SMB8J17CA-E3/52 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMB8J17CA-E3/52 suitable for automotive applications?
Yes, SMB8J17CA-E3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, ADAS sensor interfaces, and infotainment power rails. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility, and guaranteed operation from -55 °C to +150 °C. The SMB8J17CA-E3/52 meets requirements for ISO 7637-2 and ISO 16750-2 transient immunity testing in vehicle environments.
How does SMB8J17CA-E3/52 differ from unidirectional SMBJ17CA-E3/52?
The SMB8J17CA-E3/52 is bidirectional with symmetrical clamping, while SMBJ17CA-E3/52 is unidirectional and requires correct polarity orientation. SMB8J17CA-E3/52 has lower peak pulse power (800 W vs. 1000 W) and lower IPPM (29.0 A vs. 36.2 A), but eliminates layout dependency on signal polarity. Both share identical VWM (17 V), VC (27.6 V), and SMB package dimensions. The SMB8J17CA-E3/52 is preferred for AC-coupled or differential lines like CAN or RS-485.
What is the thermal resistance of SMB8J17CA-E3/52, and how does it affect PCB layout?
The SMB8J17CA-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout per Vishay specification. To maintain safe junction temperatures during repeated surges, designers must allocate adequate copper area and consider thermal vias. The SMB8J17CA-E3/52's RθJA directly impacts maximum allowable surge repetition rate and average power dissipation in continuous-duty applications.
Does SMB8J17CA-E3/52 require orientation during PCB assembly?
No, SMB8J17CA-E3/52 does not require orientation during PCB assembly because it is a bidirectional TVS diode with symmetrical terminals and no polarity marking. Unlike unidirectional variants (e.g., SMBJ17CA-E3/52), the SMB8J17CA-E3/52 functions identically regardless of placement direction-reducing assembly errors and enabling automated pick-and-place without vision-based orientation checks. This feature simplifies layout and improves manufacturing yield.
SMB8J17CA-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 29A
- Power - Peak Pulse:
- 800W
- 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-214AA (SMB)
SMB8J17CA-E3/52 FAQ
1.How can I place an order for SMB8J17CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J17CA-E3/52 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 SMB8J17CA-E3/52 reliable?
The price and inventory of SMB8J17CA-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J17CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J17CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J17CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J17CA-E3/52?
SMB8J17CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J17CA-E3/52 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 SMB8J17CA-E3/52?
For technical support, including SMB8J17CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J17CA-E3/52 requirements.
6.How does Aetrix verify that SMB8J17CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J17CA-E3/52 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 SMB8J17CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J17CA-E3/52?
All SMB8J17CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J17CA-E3/52, 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 SMB8J17CA-E3/52 part is unused and in its original packaging.
Return procedure for SMB8J17CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J17CA-E3/52 Tags
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