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Vishay General Semiconductor - Diodes Division SMB8J17C-E3/52
- Part No.:
- SMB8J17C-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J17C-E3/52.pdf
- Description:
- TVS DIODE 17VWM 30.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,036
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Product details
Overview
SMB8J17C-E3/52 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AA (SMB) 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) under 10/1000 µs waveform, 27.6 V maximum clamping voltage (VC), and 800 W peak pulse power dissipation - deployed to protect automotive sensor interfaces and industrial I/O circuits against ESD and load dump transients.
For engineers reviewing the SMB8J17C-E3/52 datasheet, SMB8J17C-E3/52 pinout, SMB8J17C-E3/52 application, or SMB8J17C-E3/52 equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, low thermal resistance (RθJL = 20 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bi-directional TVS diode 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 fast energy diversion during sub-microsecond transients.
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (260 °C peak reflow), and is qualified to AEC-Q101 for automotive under-hood applications. Its thermal resistance (RθJA = 72 °C/W) reflects optimized thermal path design for surface-mount PCB layouts with minimum recommended pad area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 12 V automotive systems. |
| VBR min / max | 18.9 V / 20.9 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on threshold across production lot. |
| VC @ IPPM | 27.6 V - Clamped voltage at 29.0 A peak pulse current; limits downstream IC stress during ISO 7637-2 Pulse 1/2a/5a events. |
| PPPM | 800 W - Peak pulse power handling with 10/1000 µs waveform; supports protection against high-energy inductive switching surges. |
| ID @ VWM | ≤1.0 µA - Reverse leakage at stand-off voltage; minimizes standby power loss in battery-powered sensor nodes. |
| RθJL | 20 °C/W - Junction-to-lead thermal resistance; enables efficient heat transfer to PCB copper, critical for sustained surge duty cycles. |
| AEC-Q101 | Qualified - Validated for automotive reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bi-directional configuration with no polarity marking - symmetrical terminals suitable for bidirectional line protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional surge conduction path | No designated anode or cathode; either terminal serves as input/output depending on transient polarity - simplifies layout for differential or AC lines. |
| Cathode Band (absent) | Polarity indicator | Not present - confirms bi-directional construction; eliminates risk of incorrect orientation during assembly. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC signals, RS-485 buses, or ungrounded sensor outputs without external polarity management. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring extended temperature operation and long-term reliability. |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh industrial environments. |
| MSL Level 1 rating | Supports standard SMT reflow profiles up to 260 °C peak without preconditioning - compatible with high-volume automated assembly. |
| Low RθJL (20 °C/W) | Facilitates rapid heat dissipation into PCB copper, improving surge endurance during repetitive transient events in motor drive I/O stages. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protecting wheel speed sensor outputs exposed to load dump and jump-start transients in chassis modules. IC Role / Device Role / Timing Role: Bi-directional TVS clamp placed directly at connector entry point to shunt surge energy before reaching signal conditioning amplifier. Use Value: Limits induced voltage to ≤27.6 V during 800 W surges, preventing latch-up or gate oxide damage in downstream ASICs. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers in factory automation PLCs subjected to ground loop surges and EFT bursts. IC Role / Device Role / Timing Role: Line-side TVS on A/B differential pair, absorbing common-mode transients while preserving signal integrity up to 10 Mbps. Use Value: Maintains <1.0 µA leakage at 17 V VWM to avoid bias current errors in precision termination networks. |
| Consumer USB Port ESD | Power Supply Input Stage |
|
Use Scenario: ESD protection for USB 2.0 D+/D− lines in automotive infotainment head units per IEC 61000-4-2 ±15 kV contact discharge. IC Role / Device Role / Timing Role: First-line defense between connector and USB transceiver, clamping sub-100 ns ESD events before propagation. Use Value: Achieves 27.6 V clamping at 29.0 A peak current, keeping transceiver I/O below absolute maximum ratings during worst-case strikes. |
Use Scenario: Secondary surge suppression on 24 V DC input rails of industrial HMIs after primary MOV-based filtering. IC Role / Device Role / Timing Role: Fast-response clamp limiting residual overshoot after slow-acting MOVs, protecting DC-DC converter front-end. Use Value: Handles 800 W pulses with 20 °C/W thermal resistance, sustaining repeated 10/1000 µs surges without thermal runaway. |
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-E3/52 | Same DO-214AA package and 17 V VWM, but rated for 1000 W PPPM (uni-directional only); lacks AEC-Q101 qualification. | Restricted to commercial-grade uni-directional use; not validated for automotive temperature cycling or HTRB stress. | Select when higher 1000 W uni-directional surge rating is required and AEC-Q101 is not mandated. |
| SMCJ17CA | DO-214AB (SMC) package, same 17 V VWM and 800 W PPPM rating, but larger footprint (7.11 mm × 6.22 mm vs. 4.57 mm × 3.94 mm). | Requires PCB layout revision due to 2.5× larger pad area; offers lower RθJA (35 °C/W) for higher thermal margin. | Choose when board space permits and enhanced thermal performance justifies larger package size. |
Compared with SMBJ17CA-E3/52 and SMCJ17CA, SMB8J17C-E3/52 uniquely combines bi-directional operation, AEC-Q101 qualification, and compact DO-214AA footprint - making it optimal for space-constrained automotive and industrial differential interface protection where polarity-agnostic clamping is essential.
Availability
SMB8J17C-E3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and consumer USB port ESD protection requiring stable component supply and full traceability.
Supply support for SMB8J17C-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMB8J series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in automotive and industrial environments where compact size and robust surge handling are critical.
FAQ
What is the clamping voltage of SMB8J17C-E3/52 at its rated peak pulse current?
The SMB8J17C-E3/52 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 ensures downstream circuitry remains within safe operating limits during surge events. The SMB8J17C-E3/52 achieves this clamping performance while maintaining low leakage and AEC-Q101 qualification.
Is SMB8J17C-E3/52 suitable for automotive applications?
Yes, SMB8J17C-E3/52 is AEC-Q101 qualified and rated for operation from -55 °C to +150 °C, making it suitable for under-hood and chassis-mounted automotive applications including sensor protection, infotainment interfaces, and body control modules. Its DO-214AA package supports automated SMT assembly, and the SMB8J17C-E3/52 meets MSL Level 1 reflow requirements - all confirmed in Vishay Document Number 88422.
How does SMB8J17C-E3/52 differ from uni-directional SMBJ17A variants?
The SMB8J17C-E3/52 is bi-directional with no polarity marking and symmetric clamping behavior, whereas SMBJ17A is uni-directional with a cathode band and only clamps in reverse bias. The SMB8J17C-E3/52 has lower peak pulse power (800 W vs. 1000 W) but retains AEC-Q101 qualification - critical for automotive use cases requiring polarity-agnostic protection like RS-485 or AC-coupled sensor lines.
What is the thermal resistance specification for SMB8J17C-E3/52?
The SMB8J17C-E3/52 has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W and junction-to-ambient (RθJA) of 72 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. This low RθJL enables effective heat transfer to the PCB, supporting reliable operation during repetitive surge events. These values are specified in the Thermal Characteristics section of the SMB8J17C-E3/52 datasheet (Document Number 88422).
Does SMB8J17C-E3/52 require special PCB layout considerations?
Yes - the SMB8J17C-E3/52 should be mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated surge performance and thermal dissipation. Smaller pads reduce IPPM derating and increase junction temperature rise. The SMB8J17C-E3/52's DO-214AA outline and pad layout are detailed in Figure "Mounting Pad Layout" on page 5 of Vishay Document Number 88422.
SMB8J17C-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.5V
- Current - Peak Pulse (10/1000µs):
- 26.2A
- 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)
SMB8J17C-E3/52 FAQ
1.How can I place an order for SMB8J17C-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J17C-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 SMB8J17C-E3/52 reliable?
The price and inventory of SMB8J17C-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 SMB8J17C-E3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J17C-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J17C-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J17C-E3/52?
SMB8J17C-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J17C-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 SMB8J17C-E3/52?
For technical support, including SMB8J17C-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J17C-E3/52 requirements.
6.How does Aetrix verify that SMB8J17C-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J17C-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 SMB8J17C-E3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J17C-E3/52?
All SMB8J17C-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J17C-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 SMB8J17C-E3/52 part is unused and in its original packaging.
Return procedure for SMB8J17C-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J17C-E3/52 Tags
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