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Vishay General Semiconductor - Diodes Division SMBJ17CA/54
- Part No.:
- SMBJ17CA/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17CA/54.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,284
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Product details
Overview
SMBJ17CA/54 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 17 V standoff voltage (VWM), 18.9–20.9 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤27.6 V at 21.7 A peak surge current - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ17CA/54 datasheet, SMBJ17CA/54 pinout, SMBJ17CA/54 application, or SMBJ17CA/54 equivalent, this device serves as a robust, AEC-Q101-qualified (with HE3/HM3 variants) transient protector for bidirectional AC-coupled or floating signal paths where low clamping voltage and fast response (<1 ns) are critical.
Technical Context
The SMBJ17CA/54 operates as a bidirectional avalanche diode with symmetrical clamping behavior in both polarities, enabling protection of AC signals or differential buses without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (≤1.0 µA at VWM), while the 100 °C/W junction-to-ambient thermal resistance supports operation up to +150 °C junction temperature.
It delivers 600 W peak pulse power under standardized 10/1000 µs waveform conditions with 0.01% duty cycle, and exhibits a temperature coefficient of VBR of +0.090 %/°C - enabling predictable derating across industrial temperature ranges. The device meets UL 497B recognition (QVGQ2) and J-STD-020 MSL Level 1 reflow compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal swing range. |
| VBR (min/max) | 18.9 V / 20.9 V at 1 mA - guaranteed avalanche initiation window; ensures consistent turn-on across production lots. |
| VC @ IPPM | 27.6 V at 21.7 A - clamped voltage during 600 W transient; determines protected circuit's maximum stress level. |
| PPPM | 600 W (10/1000 µs) - peak surge energy handling capacity; validates suitability for IEC 61000-4-5 Level 3/4 surges. |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage; preserves signal integrity and minimizes standby power loss. |
| TJ max. | +150 °C - maximum junction temperature; enables use in high-ambient industrial or under-hood automotive environments. |
| Package | SMB (DO-214AA) - industry-standard 2-pin SMD outline; compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - both terminals are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Either terminal conducts during overvoltage in either polarity; no cathode band marking required for bidirectional types. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports robust protection against lightning-induced surges and inductive switching transients per IEC 61000-4-5. |
| Low clamping voltage (27.6 V @ 21.7 A) | Minimizes voltage overshoot on protected ICs such as RS-485 transceivers or microcontroller I/O pins. |
| Fast response time (<1 ns) | Clamps transients before sensitive downstream components experience damaging overvoltage stress. |
| UL 497B recognized (QVGQ2) | Validates compliance for telecom and industrial equipment safety certification without additional system-level testing. |
| AEC-Q101 qualified option (HE3/HM3 suffixes) | Enables drop-in use in automotive body electronics and infotainment systems requiring automotive-grade reliability. |
Applications
| Industrial Sensor Interfaces | Telecom Line Protection |
|---|---|
|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loops) from ESD and load-dump transients in factory automation PLC modules. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across signal and return lines to shunt surge energy before reaching precision DAC or op-amp circuitry. Use Value: Maintains signal accuracy by limiting transient-induced offset shift and preventing latch-up in connected instrumentation amplifiers. |
Use Scenario: Shielding RS-232/RS-485 data lines in base station remote units exposed to induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on differential bus lines, working in concert with common-mode chokes. Use Value: Ensures uninterrupted communication by clamping common-mode surges to <28 V, below the absolute maximum rating of compliant transceivers. |
| Automotive Body Control Modules | Consumer Appliance Motor Drivers |
|
Use Scenario: Safeguarding LIN bus nodes (e.g., door module sensors) against battery reverse connection and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional clamping device across LIN signal and ground, rated for automotive temperature cycling and vibration. Use Value: Prevents communication failure during 12 V system faults by maintaining LIN signal integrity below 40 V during 100 V/1 s load dump events. |
Use Scenario: Protecting microcontroller GPIOs driving relay coils or small BLDC motor gate drivers in smart washing machines. IC Role / Device Role / Timing Role: Localized TVS at motor driver output stage to absorb inductive kickback from coil de-energization. Use Value: Eliminates need for external snubbers by clamping flyback spikes to 27.6 V, preserving MOSFET gate oxide integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17CA-E3/54 | Same electrical specs; RoHS-compliant commercial-grade variant with matte tin leads (J-STD-002 solderable). | No AEC-Q101 qualification; intended for non-automotive industrial/commercial use only. | Select when cost-sensitive volume production requires standard commercial-grade reliability without automotive validation. |
| SAC17CA | Same VWM/VC ratings but in smaller SOD-123FL package; lower PPPM (400 W) and higher RθJA (150 °C/W). | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 or high-current inductive loads. | Choose only for space-constrained consumer designs where 400 W surge capability suffices and thermal margin permits. |
Compared with SMBJ17CA/54, the E3/54 variant offers identical protection performance at lower qualification cost, while SAC17CA trades surge robustness and thermal performance for footprint reduction - making SMBJ17CA/54 the optimal choice for high-reliability industrial and automotive-qualified deployments.
Availability
SMBJ17CA/54 is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ17CA/54 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was engineered for high-energy transient suppression in harsh environments - targeting industrial automation, telecom infrastructure, and automotive subsystems where robustness and consistency are non-negotiable.
FAQ
What is the clamping voltage of SMBJ17CA/54 and how is it measured?
The SMBJ17CA/54 has a maximum clamping voltage (VC) of 27.6 V, measured at its peak pulse current (IPPM) of 21.7 A under the standardized 10/1000 µs double-exponential waveform. This value is guaranteed across temperature and production lot, ensuring predictable protection margins for downstream ICs. The SMBJ17CA/54 achieves this clamping performance through controlled avalanche breakdown in both directions.
Is SMBJ17CA/54 suitable for automotive applications?
SMBJ17CA/54 itself is the commercial-grade version; however, Vishay offers AEC-Q101-qualified variants (e.g., SMBJ17CAHE3_B/H) with identical electrical specs and enhanced reliability testing. These qualified versions are approved for automotive body electronics, infotainment, and LIN bus nodes. For full automotive deployment, specify the HE3 or HM3 suffix - the SMBJ17CA/54 base part is not AEC-Q101 certified.
How does SMBJ17CA/54 differ from unidirectional SMBJ17A?
The SMBJ17CA/54 is bidirectional with symmetrical clamping in both polarities and no cathode marking, whereas SMBJ17A is unidirectional with a cathode band and conducts only in reverse bias. SMBJ17CA/54 supports AC-coupled or floating signal lines (e.g., RS-485), while SMBJ17A suits DC power rails or single-polarity I/O. Their VWM, VBR, and VC values are matched, but conduction behavior differs fundamentally.
What is the thermal resistance of SMBJ17CA/54 and how does it affect layout?
The SMBJ17CA/54 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe operation at full 600 W surge rating, PCB layout must provide adequate copper area and avoid thermal bottlenecks. Derating is required above +25 °C ambient - for example, at +85 °C ambient, maximum allowable average power drops significantly. The SMBJ17CA/54 datasheet provides precise derating curves in Figure 2.
Does SMBJ17CA/54 meet any safety certifications?
Yes - SMBJ17CA/54 is Underwriters Laboratories (UL) recognized under file E136766 for both unidirectional and bidirectional devices, complying with UL 497B for telecommunications primary protectors. It also meets IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (surge) immunity standards when applied per recommended layout guidelines. The SMBJ17CA/54 achieves this via its glass-passivated junction and repeatable avalanche characteristics.
SMBJ17CA/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Cut Tape (CT)
- 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):
- 21.7A
- Power - Peak Pulse:
- 600W
- 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 (SMBJ)
SMBJ17CA/54 FAQ
1.How can I place an order for SMBJ17CA/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17CA/54 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 SMBJ17CA/54 reliable?
The price and inventory of SMBJ17CA/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ17CA/54 is usually 5 days.
3.What payment methods are accepted for SMBJ17CA/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17CA/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17CA/54?
SMBJ17CA/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17CA/54 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 SMBJ17CA/54?
For technical support, including SMBJ17CA/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17CA/54 requirements.
6.How does Aetrix verify that SMBJ17CA/54 is sourced from the original manufacturer or authorized distributors?
All SMBJ17CA/54 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 SMBJ17CA/54 meets industry standards.
7.What is the process for return or replacement of SMBJ17CA/54?
All SMBJ17CA/54 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17CA/54, 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 SMBJ17CA/54 part is unused and in its original packaging.
Return procedure for SMBJ17CA/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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