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Vishay General Semiconductor - Diodes Division SMBJ17CA-M3/52
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- Part No.:
- SMBJ17CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17CA-M3/52.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,356
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Product details
Overview
SMBJ17CA-M3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 17 V standoff voltage (VWM), 18.9–20.9 V breakdown range (VBR at 1 mA), and clamps transients to ≤27.6 V at 21.7 A peak pulse current (IPPM) under 10/1000 µs waveform - ideal for safeguarding MOSFETs, ICs, and sensor signal lines against inductive switching surges.
For engineers reviewing the SMBJ17CA-M3/52 datasheet, SMBJ17CA-M3/52 pinout, SMBJ17CA-M3/52 application, or SMBJ17CA-M3/52 equivalent, this device delivers verified 600 W peak pulse power, low incremental surge resistance, and AEC-Q101 qualification readiness - critical for automotive, industrial, and telecom system-level ESD and lightning surge protection design.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction ensures stable clamping behavior and fast response time (<1 ns), while the SMB package supports automated placement and meets UL 94 V-0 flammability requirements.
The device is rated for 150 °C maximum junction temperature and exhibits a typical thermal resistance of 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads. Its 0.090 %/°C temperature coefficient of VBR enables predictable performance across wide operating temperatures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 18.9–20.9 V at 1 mA - Confirmed breakdown onset range; ensures reliable triggering during transient events |
| VC (Clamping Voltage) | ≤27.6 V at IPPM = 21.7 A - Peak voltage seen by protected circuit during 600 W surge; limits stress on downstream components |
| PPPM (Peak Pulse Power) | 600 W (10/1000 µs waveform) - Sustains high-energy transients without failure; validated per ANSI/IEEE C62.35 |
| IPPM (Peak Pulse Current) | 21.7 A - Maximum non-repetitive surge current it can divert; directly derived from VC and PPPM |
| TJmax | 150 °C - Enables operation in under-hood automotive and industrial environments without derating penalties |
| Package | SMB (DO-214AA) - Low-profile, surface-mount outline with 5.59 mm max length; compatible with standard SMT reflow profiles |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts surge current bidirectionally when voltage exceeds ±VBR |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-line) without degradation |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage stress on protected ICs - critical for 3.3 V and 5 V logic interfaces |
| Glass-passivated junction | Ensures long-term reliability and stable leakage performance (<1 µA at VWM) over temperature and life |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance - suitable for lead-free assembly |
| UL 497B recognized (QVGQ2) | Validated for telecom and industrial surge protection systems requiring safety agency certification |
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 ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt transients before reaching signal conditioning circuitry. Use Value: Maintains signal integrity under 100 V/10 ms load dump events while limiting clamped voltage to <28 V - preserving 3.3 V microcontroller I/O tolerance. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Primary surge suppression element across 24 V DC input terminals, coordinated with upstream fuses and filtering. Use Value: Absorbs 600 W surges without failure, enabling >100,000 surge cycles per IEC 61000-4-5 - reducing field return rates in factory automation. |
| Telecom Power Interface | Consumer USB Port ESD Protection |
|
Use Scenario: Secondary protection on -48 V DC telecom power feeds subject to lightning-induced surges per ITU-T K.20/K.21. IC Role / Device Role / Timing Role: Coordinated clamping stage downstream of gas discharge tube (GDT), handling residual energy after primary diversion. Use Value: Clamps to ≤27.6 V within <1 ns, preventing latch-up in DC-DC converters and ensuring uninterrupted service during transient events. |
Use Scenario: Board-level ESD protection for USB 2.0 data lines and VBUS in smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: Fast-response TVS placed adjacent to USB connector to suppress ±15 kV contact ESD (IEC 61000-4-2) before signal integrity degrades. Use Value: Sub-1 ns response and <1 µA leakage at 17 V enable compliance with USB electrical specs while adding negligible capacitance to high-speed lines. |
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 electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3) | Preferred for commercial-grade designs where halogen-free requirement is not mandated | Select when cost sensitivity outweighs halogen-free compliance; identical footprint and assembly process |
| SMAJ17CA-M3 | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (140 °C/W) | Suitable only for lower-energy transients or space-constrained PCBs with adequate thermal relief | Choose only if board area is critical and surge threat level is ≤400 W; requires thermal validation due to reduced power handling |
Compared with SMBJ17CA-M3/52, the E3 variant offers identical protection performance at lower cost for non-automotive use, while the SMAJ17CA-M3 trades 33 % lower surge capacity and higher thermal resistance for 30 % smaller footprint - necessitating careful thermal and threat-level assessment.
Availability
SMBJ17CA-M3/52 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom power interface designs requiring stable component supply, halogen-free compliance, and AEC-Q101 qualification readiness.
Supply support for SMBJ17CA-M3/52 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, 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 automotive, industrial, and telecom applications where consistent clamping, low leakage, and long-term stability are mandatory.
FAQ
What is the clamping voltage of SMBJ17CA-M3/52 at its rated peak pulse current?
The SMBJ17CA-M3/52 clamps to a maximum of 27.6 V when subjected to its specified peak pulse current of 21.7 A under the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and reflects worst-case device behavior at TA = 25 °C with standard PCB pad layout. The SMBJ17CA-M3/52 maintains this clamping performance across its full operating temperature range, making it suitable for designs requiring predictable overvoltage limiting.
Is SMBJ17CA-M3/52 suitable for automotive applications?
SMBJ17CA-M3/52 is halogen-free and RoHS-compliant, and belongs to the AEC-Q101-qualified SMBJ family - though the exact M3/52 variant requires verification of the "HM3" suffix for formal qualification. Its 150 °C junction rating, low leakage (<1 µA at 17 V), and robust 600 W surge capability align with automotive sensor and body control module requirements. For certified AEC-Q101 use, confirm ordering code SMBJ17CAHM3_X with Vishay or authorized distributors.
How does SMBJ17CA-M3/52 differ from unidirectional SMBJ17A-M3/52?
The SMBJ17CA-M3/52 is bidirectional with symmetrical breakdown and clamping in both polarities, while SMBJ17A-M3/52 is unidirectional and conducts only in reverse bias (cathode-banded). The "CA" suffix denotes bidirectional functionality - critical for AC-coupled or floating signal lines. Both share identical VWM (17 V), VBR, and PPPM, but SMBJ17A-M3/52 has a forward voltage drop (~3.5 V at 50 A) absent in the CA version. Select SMBJ17CA-M3/52 for differential or dual-rail protection.
What is the thermal resistance of SMBJ17CA-M3/52, and how does it affect layout?
SMBJ17CA-M3/52 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. This value assumes minimal copper area; increasing pad size or adding internal ground planes reduces RθJA. For continuous power dissipation near its 5.0 W rating, thermal vias and multi-layer heat spreading are recommended. The SMBJ17CA-M3/52's RθJL of 20 °C/W indicates efficient heat transfer to PCB leads, supporting reliable operation in compact layouts.
Does SMBJ17CA-M3/52 require orientation during PCB placement?
No - SMBJ17CA-M3/52 is a bidirectional TVS diode with no polarity marking or cathode band; both terminals are functionally identical. Unlike unidirectional variants (e.g., SMBJ17A-M3/52), it conducts surge current equally in either direction once voltage exceeds ±VBR. This eliminates orientation errors during automated placement and simplifies layout for differential or floating nodes. The SMBJ17CA-M3/52's symmetry is confirmed in Vishay's datasheet Section "DEVICES FOR BIDIRECTION APPLICATIONS".
SMBJ17CA-M3/52 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):
- 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-M3/52 FAQ
1.How can I place an order for SMBJ17CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17CA-M3/52 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 SMBJ17CA-M3/52 reliable?
The price and inventory of SMBJ17CA-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ17CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ17CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17CA-M3/52?
SMBJ17CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17CA-M3/52 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 SMBJ17CA-M3/52?
For technical support, including SMBJ17CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17CA-M3/52 requirements.
6.How does Aetrix verify that SMBJ17CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ17CA-M3/52 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 SMBJ17CA-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ17CA-M3/52?
All SMBJ17CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17CA-M3/52, 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 SMBJ17CA-M3/52 part is unused and in its original packaging.
Return procedure for SMBJ17CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ17CA-M3/52 Tags
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