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Vishay General Semiconductor - Diodes Division SMB8J17CA-E3/5B
- Part No.:
- SMB8J17CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J17CA-E3/5B.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,489
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Product details
Overview
SMB8J17CA-E3/5B 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 standoff voltage (VWM), 18.9–20.9 V breakdown range (VBR at 1 mA), 27.6 V clamping voltage (VC) at 29.0 A peak pulse current (IPPM), and 800 W peak pulse power (10/1000 µs waveform). It is AEC-Q101 qualified and used to protect automotive sensor interfaces against ESD and load dump transients.
For engineers reviewing the SMB8J17CA-E3/5B datasheet, SMB8J17CA-E3/5B pinout, SMB8J17CA-E3/5B application, or SMB8J17CA-E3/5B equivalent, key selection criteria include bidirectional clamping capability, 27.6 V VC under 29.0 A surge, AEC-Q101 qualification, RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling robust protection of AC-coupled or differential signal paths without polarity sensitivity. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM), while the low incremental surge resistance supports consistent clamping performance under repetitive transients.
The device meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), has a thermal resistance of 72 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), and is rated for operation from –55 °C to +150 °C - making it suitable for under-hood automotive environments and industrial control systems requiring high-reliability transient suppression.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal swing margin in protected circuit. |
| VBR (min/max) | 18.9 V / 20.9 V at 1 mA - guaranteed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 27.6 V at 29.0 A - clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 800 W - peak pulse power handling (10/1000 µs); quantifies energy absorption capacity for lightning or inductive switch-off surges. |
| ID @ VWM | <1.0 µA - ultra-low reverse leakage at standoff voltage; preserves signal integrity and minimizes standby power loss. |
| TJ max. | +150 °C - maximum junction temperature rating; enables deployment in high-temperature automotive and industrial enclosures. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - symmetrical terminals enable orientation-agnostic PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as anode or cathode depending on transient polarity; no color band or marking required. |
| Case (cathode side in unidirectional variants) | Thermal and mechanical interface | Exposed metal slug provides low RθJL (20 °C/W); requires minimum 5.0 mm × 5.0 mm copper pad per terminal for rated power dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| MSL Level 1 rating | Supports standard lead-free reflow profiles up to 260 °C peak without preconditioning or dry pack requirements. |
| Matte tin-plated leads | Guarantees solderability per J-STD-002 and whisker resistance per JESD 201 Class 2 for high-volume manufacturing. |
| UL 94 V-0 molding compound | Provides flame-retardant encapsulation essential for automotive and industrial safety compliance. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Delivers tight voltage limiting relative to breakdown - critical for protecting 3.3 V or 5 V logic-level interfaces. |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
|
Use Scenario: Protecting LIN, SENT, or analog sensor outputs (e.g., pressure, temperature) from battery load dump and ISO 7637-2 pulses in engine control modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, absorbing transients before they reach ADC input or microcontroller GPIO. Use Value: Maintains signal fidelity under ±25 V transients while holding clamped voltage below 28 V - within absolute maximum rating of most automotive-grade signal conditioners. |
Use Scenario: Safeguarding CAN_H and CAN_L lines in vehicle body control units against ESD (IEC 61000-4-2) and coupled surges from nearby solenoid switching. IC Role / Device Role / Timing Role: Differential TVS pair (one per line) providing symmetrical clamping without disrupting 1 Mbps CAN signaling integrity. Use Value: Low 27.6 V clamping voltage prevents CAN transceiver damage during 1 kV/500 A surge events, while sub-1 µA leakage avoids bus bias shift. |
| Consumer USB Port ESD Suppression | Industrial PLC Analog Input Protection |
|
Use Scenario: Shielding USB 2.0 D+ and D− lines in automotive infotainment head units from contact ESD up to ±15 kV (air) and ±8 kV (contact). IC Role / Device Role / Timing Role: Dual-line bidirectional TVS placed adjacent to USB connector, shunting fast transients to chassis ground. Use Value: 29.0 A IPPM and 27.6 V VC ensure full IEC 61000-4-2 Level 4 compliance without signal distortion or data corruption during hot-plug events. |
Use Scenario: Protecting 4–20 mA current loop inputs in programmable logic controllers exposed to field wiring surges from motor drives or lightning-induced coupling. IC Role / Device Role / Timing Role: Series-connected bidirectional TVS on each analog input channel, limiting transient voltage before precision op-amp front-end. Use Value: 17 V VWM allows safe operation across full 4–20 mA span (≤10 V drop typical), while 800 W PPPM handles multi-kA induced surges per IEC 61000-4-5. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17CA-E3/5B | Unidirectional variant with same VWM/VBR/VC but asymmetric conduction; lacks reverse-polarity clamping. | Only suitable where polarity is fixed (e.g., DC power rail); not usable on AC or differential signals. | Select SMBJ17CA-E3/5B only when protecting unidirectional lines with known polarity and no need for bidirectional symmetry. |
| SMCJ17CA-E3/57 | Same electrical specs but in larger SMC (DO-214AB) package; higher thermal mass and 1500 W PPPM rating. | Better suited for high-energy industrial surges; requires larger PCB footprint and different pad layout. | Choose SMCJ17CA-E3/57 when system-level surge tests exceed 800 W or thermal derating demands lower RθJA. |
Compared with SMB8J17CA-E3/5B, SMBJ17CA-E3/5B offers no bidirectional protection and thus cannot replace it in differential or AC-coupled applications, while SMCJ17CA-E3/57 delivers higher surge capacity at the cost of board space and assembly compatibility - making SMB8J17CA-E3/5B the optimal balance of compactness, symmetry, and AEC-Q101 compliance for automotive signal line protection.
Availability
SMB8J17CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, consumer USB ports, and PLC analog inputs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMB8J17CA-E3/5B 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 SMB8J series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-power-density, surface-mount surge protection in automotive, industrial, and communications systems where AEC-Q101 qualification and precise clamping performance are mandatory.
FAQ
What is the clamping voltage of SMB8J17CA-E3/5B at its rated peak pulse current?
The SMB8J17CA-E3/5B has a maximum clamping voltage (VC) of 27.6 V when subjected to its rated peak pulse current (IPPM) of 29.0 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream components experience no more than 27.6 V during surge events - critical for safeguarding 3.3 V or 5 V logic interfaces. The SMB8J17CA-E3/5B maintains this clamping performance across its full operating temperature range.
Is SMB8J17CA-E3/5B suitable for automotive applications?
Yes, SMB8J17CA-E3/5B is AEC-Q101 qualified and explicitly designed for automotive use, including under-hood and body electronics. Its –55 °C to +150 °C operating range, MSL Level 1 reflow compatibility, and validation against temperature cycling, HTRB, and ESD stress make it appropriate for engine control units, ADAS sensors, and infotainment systems. The SMB8J17CA-E3/5B meets stringent automotive reliability requirements without derating.
What does the "CA" suffix indicate in SMB8J17CA-E3/5B?
The "CA" suffix in SMB8J17CA-E3/5B denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. This distinguishes it from unidirectional variants (e.g., SMB8J17A), which only clamp in one polarity. The SMB8J17CA-E3/5B has no polarity marking and can be mounted in either orientation, simplifying PCB layout for differential or AC-coupled signal lines.
How does SMB8J17CA-E3/5B differ from SMBJ17CA-E3/5B?
SMB8J17CA-E3/5B is bidirectional with symmetrical clamping, while SMBJ17CA-E3/5B is unidirectional and only clamps in one direction. Their VWM (17 V), VBR (18.9–20.9 V), and VC (27.6 V) match, but SMBJ17CA-E3/5B includes a cathode band and cannot protect AC or differential signals. The SMB8J17CA-E3/5B replaces SMBJ17CA-E3/5B only in applications requiring polarity-agnostic surge suppression - such as CAN, LIN, or USB data lines.
What PCB pad layout is required to achieve the full 800 W rating of SMB8J17CA-E3/5B?
To achieve the full 800 W peak pulse power rating, SMB8J17CA-E3/5B must be mounted on minimum recommended copper pads: 0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal, as specified in the Vishay datasheet (Document Number: 88422). Smaller pads cause thermal derating - e.g., at 75 °C ambient, power capability drops significantly. The SMB8J17CA-E3/5B thermal resistance (RθJA = 72 °C/W) assumes this layout; deviating reduces surge endurance and increases junction temperature.
SMB8J17CA-E3/5B 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-E3/5B FAQ
1.How can I place an order for SMB8J17CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J17CA-E3/5B 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-E3/5B reliable?
The price and inventory of SMB8J17CA-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J17CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J17CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J17CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J17CA-E3/5B?
SMB8J17CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J17CA-E3/5B 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-E3/5B?
For technical support, including SMB8J17CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J17CA-E3/5B requirements.
6.How does Aetrix verify that SMB8J17CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J17CA-E3/5B 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-E3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J17CA-E3/5B?
All SMB8J17CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J17CA-E3/5B, 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-E3/5B part is unused and in its original packaging.
Return procedure for SMB8J17CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J17CA-E3/5B Tags
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