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Vishay General Semiconductor - Diodes Division SMBJ17A-E3/52
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- Part No.:
- SMBJ17A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17A-E3/52.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,564
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Product details
Overview
SMBJ17A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 17 V stand-off voltage (VWM), 18.9–20.9 V breakdown voltage (VBR) at 1 mA, 27.6 V maximum clamping voltage (VC) at 21.7 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial motor drives, automotive body control modules, and industrial sensor interfaces.
For engineers reviewing the SMBJ17A-E3/52 datasheet, SMBJ17A-E3/52 pinout, SMBJ17A-E3/52 application, or SMBJ17A-E3/52 equivalent, key selection criteria include clamping performance under 21.7 A surge, thermal resistance (RθJA = 100 °C/W), unidirectional polarity with cathode band marking, and RoHS-compliant matte tin-plated leads suitable for J-STD-002 soldering.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds VBR, it avalanches rapidly (<1 ns response) to divert surge current away from downstream ICs or MOSFETs. Its low incremental surge resistance ensures minimal voltage overshoot during clamping, while the glass-passivated junction guarantees stable leakage (<1 µA at 17 V) and long-term reliability.
The SMBJ17A-E3/52 is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (260 °C peak reflow), and supports repetitive surge duty cycles up to 0.01 % - making it suitable for systems exposed to frequent inductive switching transients in factory automation and automotive ECUs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17 V - maximum continuous reverse working voltage before significant leakage; defines safe DC rail operating margin. |
| VBR (Breakdown Voltage) | 18.9–20.9 V at 1 mA - precise avalanche initiation threshold; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 27.6 V at IPPM = 21.7 A - peak voltage seen by protected circuit during worst-case 600 W surge; critical for MOSFET gate oxide safety. |
| PPPM (Peak Pulse Power) | 600 W (10/1000 µs) - standardized surge energy handling capacity; validates compliance with IEC 61000-4-5 Level 4. |
| ID (Reverse Leakage) | ≤1.0 µA at 17 V - ultra-low standby current; avoids loading on low-power sensor supply rails. |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on 0.2" × 0.2" copper pads; informs derating above 25 °C ambient. |
| Polarity | Unidirectional - cathode marked by band; enables DC-biased protection without reverse conduction path. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); cathode identified by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction (surge clamping) | Connected to protected line (e.g., 12 V rail); forms low-impedance path to ground during overvoltage. |
| Cathode | Current exit during clamping; marked by band | Connected to system ground; polarity must match DC bias to avoid unintended forward conduction. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validates robustness against high-energy transients from relay coils, solenoids, and motor commutation. |
| 27.6 V clamping at 21.7 A | Ensures protected 15–24 V logic or power circuits remain below absolute maximum ratings during surge events. |
| Glass passivated chip junction | Provides stable VBR tolerance and low leakage across temperature (-55 °C to +150 °C). |
| MSL Level 1 (260 °C peak) | Enables compatibility with standard lead-free reflow profiles without moisture-related popcorning. |
| RoHS-compliant, matte tin plating | Supports reliable solder wetting per J-STD-002 and eliminates whisker risk per JESD 201 Class 2. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 24 V DC input stage against back-EMF spikes from brushed DC motors and contactor switching. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between motor supply rail and chassis ground. Use Value: Clamps transients to ≤27.6 V, preventing damage to upstream DC-DC converters and microcontroller power inputs. |
Use Scenario: Guarding LIN bus transceiver power pins against load dump and jump-start surges in door module ECUs. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V supply line, triggered only during >18.9 V overvoltage events. Use Value: Maintains <1 µA leakage at nominal 12 V, avoiding battery drain while surviving 600 W pulses per ISO 7637-2. |
| Factory Automation Sensors | Telecom Power Interfaces |
|
Use Scenario: Shielding 4–20 mA current loop transmitter outputs from ESD and cable-induced surges in PLC I/O racks. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on analog output line referenced to local ground. Use Value: Sub-1 ns response limits voltage overshoot to <28 V, preserving ADC reference integrity and op-amp input stages. |
Use Scenario: Secondary-side overvoltage suppression on 48 V telecom power distribution boards feeding PoE injectors. IC Role / Device Role / Timing Role: Primary clamping device on DC feed line before DC-DC isolation stage. Use Value: 600 W rating handles repeated lightning-induced surges per GR-1089-CORE, with RθJA enabling thermal stability at 50 °C ambient. |
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 | Bidirectional variant; symmetric VBR (18.9–20.9 V) in both polarities; no cathode marking. | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where polarity reversal may occur. | Select SMBJ17CA-E3/52 only when bidirectional clamping is mandated by signal topology; not interchangeable with SMBJ17A-E3/52 in DC-biased rails. |
| SMAJ17A-E3/52 | Same VWM/VBR/VC specs but in smaller SMA (DO-214AC) package; RθJA = 140 °C/W; lower IPPM (17.4 A). | Suitable for space-constrained consumer electronics; insufficient for 21.7 A surge demands in industrial power rails. | Choose SMAJ17A-E3/52 only for compact designs with verified lower surge exposure; SMBJ17A-E3/52 provides 25 % higher IPPM and better thermal dissipation. |
Compared with SMBJ17CA-E3/52 and SMAJ17A-E3/52, the SMBJ17A-E3/52 delivers optimal balance of high surge current headroom (21.7 A), industry-standard SMB thermal performance (RθJA = 100 °C/W), and unidirectional polarity assurance - making it the preferred choice for fixed-polarity DC protection in harsh industrial and automotive environments.
Availability
SMBJ17A-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and factory automation sensors requiring stable component supply with full traceability and lifecycle management.
Supply support for SMBJ17A-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 high-reliability diodes, rectifiers, and protection devices for demanding industrial and automotive applications.
The SMBJ series was engineered specifically for high-energy transient suppression in DC power systems, emphasizing tight VBR tolerance, low clamping ratio, and robust reflow survivability in automated SMT assembly.
FAQ
What is the maximum clamping voltage of SMBJ17A-E3/52 at its rated peak pulse current?
The SMBJ17A-E3/52 has a maximum clamping voltage (VC) of 27.6 V at its peak pulse current (IPPM) of 21.7 A, measured with a 10/1000 µs waveform. This value defines the highest voltage the protected circuit will experience during a full-rated 600 W transient event, ensuring downstream components like MOSFETs or regulators remain within safe operating limits. The SMBJ17A-E3/52 achieves this with low incremental surge resistance and a stable glass-passivated junction.
Is SMBJ17A-E3/52 suitable for automotive applications requiring AEC-Q101 qualification?
No - SMBJ17A-E3/52 is the commercial-grade RoHS-compliant version. For AEC-Q101 qualified use, select SMBJ17AHE3_B/H or SMBJ17AHM3_B/H, which carry the HE3 or HM3 suffix and are explicitly tested to AEC-Q101 stress requirements. The SMBJ17A-E3/52 lacks the automotive qualification documentation and process controls required for under-hood or safety-critical vehicle subsystems.
How does the SMBJ17A-E3/52 differ from bidirectional variants like SMBJ17CA-E3/52?
The SMBJ17A-E3/52 is unidirectional, with a cathode band marking and conduction only in reverse bias above VBR; SMBJ17CA-E3/52 is bidirectional, clamping symmetrically in both polarities and lacking polarity markings. This makes SMBJ17A-E3/52 appropriate for DC rails where polarity is fixed, while SMBJ17CA-E3/52 suits AC or floating differential lines. They are not pin-compatible replacements due to differing electrical behavior under forward bias.
What is the thermal resistance and how does it affect SMBJ17A-E3/52 layout design?
The SMBJ17A-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. This means each watt of sustained power dissipation raises the junction temperature by 100 °C above ambient - critical for derating peak pulse capability above 25 °C. Layout must provide adequate copper area and avoid thermal bottlenecks to maintain reliability during repetitive surge events. The SMBJ17A-E3/52 requires no active cooling but benefits from thermal relief optimization.
Can SMBJ17A-E3/52 be used to protect 3.3 V or 5 V logic circuits?
No - SMBJ17A-E3/52 is not suitable for 3.3 V or 5 V logic protection because its 17 V stand-off voltage (VWM) and 18.9 V minimum breakdown voltage (VBR) are far above those rails; it would not activate before damage occurs. For such low-voltage circuits, use TVS devices with VWM ≤ 5.5 V (e.g., SMBJ5.0A-E3/52). The SMBJ17A-E3/52 is intended for 12–24 V systems where its clamping voltage of 27.6 V provides appropriate margin.
SMBJ17A-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:
- 1
- Bidirectional Channels:
- -
- 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)
SMBJ17A-E3/52 FAQ
1.How can I place an order for SMBJ17A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17A-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 SMBJ17A-E3/52 reliable?
The price and inventory of SMBJ17A-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 SMBJ17A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ17A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17A-E3/52?
SMBJ17A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17A-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 SMBJ17A-E3/52?
For technical support, including SMBJ17A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17A-E3/52 requirements.
6.How does Aetrix verify that SMBJ17A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ17A-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 SMBJ17A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ17A-E3/52?
All SMBJ17A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17A-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 SMBJ17A-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ17A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ17A-E3/52 Tags
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