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Vishay General Semiconductor - Diodes Division SMBJ17A-E3/5B
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- Part No.:
- SMBJ17A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17A-E3/5B.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,651
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Product details
Overview
SMBJ17A-E3/5B from Vishay General Semiconductor is a unidirectional 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 stand-off voltage (VWM), 18.9–20.9 V breakdown voltage (VBR) at 1 mA, and clamps transients to ≤27.6 V at 21.7 A peak pulse current (IPPM) under a 10/1000 µs waveform - deployed on power rails and signal lines in industrial motor drives.
For engineers reviewing the SMBJ17A-E3/5B datasheet, SMBJ17A-E3/5B pinout, SMBJ17A-E3/5B application, or SMBJ17A-E3/5B equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance, RoHS-compliant packaging details, and direct alternatives for ESD/surge protection design-in.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low dynamic impedance. Its 600 W peak pulse power rating (10/1000 µs) and 1.0 µA max reverse leakage at 17 V enable reliable suppression of inductive switching spikes and lightning-induced surges without forward conduction interference.
Thermal performance is defined by RθJA = 100 °C/W (on standard 0.2" × 0.2" copper pads) and TJ(max) = +150 °C, supporting operation in automotive-grade ambient environments when mounted per J-STD-020 MSL Level 1 reflow profile (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected circuit DC bias. |
| VBR (min/max) | 18.9 V / 20.9 V at IT = 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | ≤27.6 V at 21.7 A - Clamped voltage during 600 W surge; defines maximum stress imposed on downstream ICs or MOSFETs. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; validates suitability for IEC 61000-4-5 Level 3/4 surge testing. |
| IFSM | 100 A - Non-repetitive forward surge current (8.3 ms half-sine); supports protection against high-energy inductive kickback. |
| TJ(max) | +150 °C - Maximum junction temperature; enables use in under-hood automotive or enclosed industrial enclosures. |
| Package | SMB (DO-214AA) - Low-profile SMD outline (5.21 mm × 4.06 mm × 2.20 mm); compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
SMBJ17A-E3/5B uses the SMB (DO-214AA) surface-mount package with two terminals: cathode (marked by band) and anode. The device is unidirectional; polarity must be observed during PCB layout to ensure correct clamping direction relative to protected line polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Protected line connection point | Connected to the line being safeguarded (e.g., VCC, signal input); conducts during overvoltage to shunt energy to ground. |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes clamping path during transient event. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validated surge immunity for IEC 61000-4-5 compliance in industrial control and telecom infrastructure. |
| Low clamping voltage (27.6 V @ 21.7 A) | Minimizes voltage overshoot on 24 V systems, protecting 30 V-rated MOSFETs and microcontrollers without derating margin loss. |
| Glass-passivated junction | Ensures stable VBR and leakage performance across temperature and lifetime; eliminates risk of metallization migration. |
| MSL Level 1 (260 °C peak) | Enables single-pass lead-free reflow without popcorn cracking or delamination; no pre-bake required. |
| RoHS-compliant, matte tin-plated leads | Meets J-STD-002 solderability and JESD22-B102 whisker resistance Class 2; supports high-reliability production. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and MCU I/O pins against back-EMF spikes from brushed DC motors and solenoids. IC Role / Device Role / Timing Role: Unidirectional TVS placed between driver output and ground to clamp negative-going transients during switch-off. Use Value: Limits voltage excursion to ≤27.6 V, preventing latch-up or oxide breakdown in 3.3 V/5 V logic interfaces driving 24 V loads. |
Use Scenario: Surge suppression on LIN bus lines and sensor supply rails exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between LIN signal and chassis ground to absorb 10/1000 µs transients up to 600 W. Use Value: Maintains 17 V stand-off while clamping to 27.6 V, preserving signal integrity during ISO 7637-2 Pulse 1/2a/5a events. |
| Telecom Power Supplies | Consumer Appliance Control Boards |
|
Use Scenario: Input-stage protection on 24 V/48 V DC-DC converters subjected to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary-level TVS on converter input rail, coordinated with upstream fuses and common-mode chokes. Use Value: Absorbs 600 W pulses without degradation, enabling pass/fail compliance with ITU-T K.20/K.21 telecom surge standards. |
Use Scenario: ESD and switching transient protection on microcontroller reset lines and relay coil drivers in washing machines and HVAC controls. IC Role / Device Role / Timing Role: Localized TVS on 3.3 V reset net and 12 V relay coil, oriented to clamp both positive and negative transients. Use Value: Sub-ns response prevents MCU brownout or false resets during relay de-energization; 1.0 µA leakage avoids battery drain. |
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 | Bidirectional variant; symmetric VBR (18.9–20.9 V) and same VC/PPPM; no polarity marking. | Required where AC-coupled or bidirectional signal lines (e.g., RS-485, CAN) need symmetrical clamping. | Select SMBJ17CA-E3/5B only if protecting balanced differential pairs or AC signals; not drop-in for unidirectional DC rails. |
| SMCJ17A-E3/57T | Larger SMC (DO-214AB) package; identical VWM/VBR/VC but higher PPPM = 1500 W and IPPM = 54.3 A. | Suitable for higher-energy surge environments (e.g., outdoor telecom cabinets, solar inverters) requiring extended surge endurance. | Choose SMCJ17A-E3/57T when 600 W is insufficient; requires PCB footprint change and thermal pad redesign due to larger case size. |
Compared with SMBJ17A-E3/5B, SMBJ17CA-E3/5B provides bidirectional clamping without polarity constraints but sacrifices DC blocking capability, while SMCJ17A-E3/57T delivers 2.5× higher surge capacity at the cost of board area and thermal management complexity.
Availability
SMBJ17A-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power supplies, and consumer appliance control boards requiring stable component supply with full traceability and RoHS compliance.
Supply support for SMBJ17A-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, TVS devices, and optoelectronics with emphasis on reliability, precision, and high-volume manufacturability.
The SMBJ series is engineered for robust transient suppression in harsh environments - targeting industrial automation, automotive subsystems, and infrastructure equipment where failure modes must be mitigated without compromising signal integrity.
FAQ
What is the maximum clamping voltage of SMBJ17A-E3/5B at its rated peak pulse current?
The SMBJ17A-E3/5B clamps to a maximum of 27.6 V when subjected to its specified peak pulse current of 21.7 A (10/1000 µs waveform). This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The clamping performance is guaranteed across the full operating temperature range and remains stable due to the device's glass-passivated junction structure.
Is SMBJ17A-E3/5B suitable for automotive applications?
SMBJ17A-E3/5B is RoHS-compliant and qualified to MSL Level 1, but it is not AEC-Q101 certified in this specific suffix. For automotive use, Vishay offers the AEC-Q101-qualified variant SMBJ17AHE3_B/I (with HE3 suffix). Engineers designing for automotive body electronics should verify qualification status via the ordering code and select the HE3 or HM3 version if AEC-Q101 compliance is mandatory for PPAP submission or functional safety requirements.
How does the SMBJ17A-E3/5B differ from the SMBJ17CA-E3/5B?
The SMBJ17A-E3/5B is unidirectional with cathode band marking and blocks reverse current above 17 V, while the SMBJ17CA-E3/5B is bidirectional with symmetric breakdown in both polarities and no polarity marking. Their VBR, VC, and PPPM ratings are identical, but the CA version cannot replace the A version in DC-coupled circuits without redesigning the grounding scheme and verifying bidirectional clamping behavior.
What is the thermal resistance junction-to-ambient for SMBJ17A-E3/5B?
The typical thermal resistance junction-to-ambient (RθJA) for SMBJ17A-E3/5B is 100 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes still air conditions and is critical for calculating junction temperature rise under sustained power dissipation - especially important when evaluating derating curves for repetitive surge duty cycles or elevated ambient temperatures.
Can SMBJ17A-E3/5B be used in place of SMAJ17A?
No - SMBJ17A-E3/5B and SMAJ17A are not interchangeable. While both are unidirectional TVS diodes with 17 V VWM, the SMAJ series uses the smaller SMA (DO-214AC) package with lower PPPM (400 W vs. 600 W) and different thermal characteristics. Substituting SMBJ17A-E3/5B for SMAJ17A may cause mechanical fit issues and over-spec the board, whereas replacing SMBJ17A-E3/5B with SMAJ17A risks surge failure due to insufficient power handling.
SMBJ17A-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:
- 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-E3/5B FAQ
1.How can I place an order for SMBJ17A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17A-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 SMBJ17A-E3/5B reliable?
The price and inventory of SMBJ17A-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 SMBJ17A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ17A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17A-E3/5B?
SMBJ17A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17A-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 SMBJ17A-E3/5B?
For technical support, including SMBJ17A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17A-E3/5B requirements.
6.How does Aetrix verify that SMBJ17A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ17A-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 SMBJ17A-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ17A-E3/5B?
All SMBJ17A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17A-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 SMBJ17A-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ17A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ17A-E3/5B Tags
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