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Vishay General Semiconductor - Diodes Division SMBJ17C-E3/5B
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- Part No.:
- SMBJ17C-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17C-E3/5B.pdf
- Description:
- TVS DIODE 17VWM 30.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,062
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Product details
Overview
SMBJ17C-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping fast-rising voltage transients on power and signal lines. It features a 17 V standoff voltage (VWM), 18.9–20.9 V breakdown range (VBR at 1 mA), 27.6 V maximum clamping voltage (VC) at 21.7 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial motor drives.
For engineers reviewing the SMBJ17C-E3/5B datasheet, SMBJ17C-E3/5B pinout, SMBJ17C-E3/5B application, or SMBJ17C-E3/5B equivalent, key selection criteria include clamping voltage margin relative to protected device's absolute maximum rating, thermal resistance (RθJA = 100 °C/W), unidirectional polarity marking, and compliance with IEC 61000-4-2/4-4/4-5 surge immunity standards.
Technical Context
This TVS diode operates as a voltage-clamping protection device that remains high-impedance below VWM = 17 V and transitions rapidly (<1 ps response time) into low-impedance conduction when transient voltage exceeds VBR. Its glass-passivated junction ensures stable leakage performance and long-term reliability under repetitive surge stress.
The SMBJ17C-E3/5B is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports operating junction temperatures from –55 °C to +150 °C, and meets MSL Level 1 per J-STD-020 with peak reflow temperature of 260 °C - enabling compatibility with standard SMT assembly processes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse working voltage before clamping begins; sets upper limit for normal circuit operation. |
| VBR (min/max) | 18.9 V / 20.9 V at 1 mA - verified breakdown threshold defining turn-on consistency across production lots. |
| VC @ IPPM | 27.6 V at 21.7 A - clamping voltage during 10/1000 µs surge; determines worst-case overvoltage seen by downstream IC. |
| PPPM | 600 W - peak pulse power handling capability; defines transient energy absorption capacity without failure. |
| IFSM | 100 A - single half-sine surge current rating (8.3 ms); validates robustness against inductive switching events. |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; guides PCB thermal layout. |
| TJ max | +150 °C - maximum allowable junction temperature; constrains ambient operating range and power derating. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking on cathode end; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when voltage exceeds VBR. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or lower-potential rail; completes clamping path during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables reliable suppression of high-energy transients from inductive load switching or lightning-induced surges. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage stress on protected ICs while maintaining sufficient margin above VWM. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and direct placement into reflow ovens without baking preconditioning. |
| Glass passivated junction | Ensures stable reverse leakage (<1 µA at VWM) and long-term parameter stability under thermal cycling. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets global environmental regulations without halogen content restrictions; suitable for consumer and industrial use. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O pins against back-EMF spikes from relay coils and solenoid actuation. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between driver output and ground to shunt inductive kickback. Use Value: Limits transient voltage to ≤27.6 V, preventing latch-up or oxide damage in 3.3 V/5 V logic interfaces. |
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 on 12 V supply input to absorb ISO 7637-2 Pulse 1/2a/5a energy without crowbar action. Use Value: Maintains 17 V working margin while clamping 10/1000 µs surges up to 21.7 A without degradation. |
| Industrial PLC I/O Modules | Consumer Appliance Power Supplies |
|
Use Scenario: Input protection for analog sensor front-ends (e.g., thermistor, pressure transducer) connected to noisy factory floors. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS on signal line to ground, preserving measurement accuracy during quiescent operation. Use Value: Prevents ESD-induced offset drift or ADC saturation while adding <0.5 pF parasitic capacitance at 0 V bias. |
Use Scenario: Secondary-side transient protection on 5 V/12 V DC outputs of switched-mode power supplies in refrigerators and washing machines. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) clamp absorbing capacitor discharge surges and relay contact arcing. Use Value: Survives ≥1000 surges at rated PPPM without parameter shift, ensuring field-reliability over 10-year product lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17A-E3/5B | Same VWM, VBR, and VC; identical SMB package and RoHS-compliant E3 termination. | No functional difference; "A" suffix denotes same unidirectional configuration as "C" in Vishay's legacy marking convention. | Select SMBJ17A-E3/5B if sourcing from distributors listing only "A"-suffixed variants; electrically interchangeable. |
| SMCJ17A-E3/57T | Higher PPPM = 1500 W, larger SMC (DO-214AB) package, RθJA = 35 °C/W, same VWM/VC specs. | Better thermal performance and surge endurance; requires larger PCB footprint and different pad layout. | Choose SMCJ17A-E3/57T when system-level surge testing exceeds IEC 61000-4-5 Level 4 (4 kV line-earth); not drop-in. |
Compared with SMBJ17C-E3/5B, SMBJ17A-E3/5B offers identical electrical behavior and board fit, while SMCJ17A-E3/57T delivers higher surge margin at the cost of increased size and thermal design effort - making the former ideal for footprint-constrained designs and the latter for high-reliability industrial systems.
Availability
SMBJ17C-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, PLC I/O protection, and consumer appliance power supplies requiring stable component supply and consistent surge immunity performance.
Supply support for SMBJ17C-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 application-specific optimization.
The SMBJ series was developed for high-efficiency, surface-mount transient suppression in space-constrained power and signal lines - targeting industrial automation, automotive subsystems, and consumer electronics where repeatable clamping and SMT manufacturability are critical.
FAQ
What is the polarity configuration of SMBJ17C-E3/5B?
SMBJ17C-E3/5B is a unidirectional TVS diode, with cathode identified by the band marking on the SMB package. It conducts only when the cathode is at higher potential than the anode, making it suitable for DC-biased lines like power rails and digital I/O where reverse conduction must be blocked. This polarity prevents unintended conduction during normal operation while enabling precise clamping during positive transients.
Does SMBJ17C-E3/5B meet automotive qualification standards?
SMBJ17C-E3/5B is RoHS-compliant and rated for commercial temperature range (–55 °C to +150 °C), but it is not AEC-Q101 qualified. For automotive applications requiring AEC-Q101, Vishay offers the SMBJ17HE3 variant (with HE3 suffix), which undergoes additional stress testing and process controls. SMBJ17C-E3/5B remains appropriate for non-safety-critical automotive subsystems where full qualification is not mandated.
What is the maximum clamping voltage of SMBJ17C-E3/5B under surge conditions?
The maximum clamping voltage (VC) of SMBJ17C-E3/5B is 27.6 V, measured at its rated peak pulse current (IPPM) of 21.7 A using the standardized 10/1000 µs double-exponential waveform. This value represents the worst-case voltage imposed on protected circuitry during a full-power surge event and must be compared against the absolute maximum ratings of downstream components to ensure safe operation.
How does SMBJ17C-E3/5B differ from bidirectional variants like SMBJ17CA?
SMBJ17C-E3/5B is unidirectional and blocks reverse current until breakdown, whereas SMBJ17CA is bidirectional and clamps symmetrically for AC or floating signal lines. The unidirectional SMBJ17C-E3/5B has lower leakage (<1 µA at 17 V) and slightly tighter VBR tolerance than its bidirectional counterpart, making it preferred for DC power rail protection where reverse conduction must be avoided.
What PCB pad layout is recommended for optimal thermal performance of SMBJ17C-E3/5B?
Vishay specifies SMBJ17C-E3/5B's RθJA = 100 °C/W based on mounting to 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain this thermal resistance, use minimum 5 mm × 5 mm thermal pads connected to internal ground planes via ≥4 thermal vias (0.3 mm diameter) per pad. Avoid narrow traces between pads and ground; ensure solder mask opening fully exposes copper for maximum heat dissipation during surge events.
SMBJ17C-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:
- 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):
- 19.7A
- 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)
SMBJ17C-E3/5B FAQ
1.How can I place an order for SMBJ17C-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17C-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 SMBJ17C-E3/5B reliable?
The price and inventory of SMBJ17C-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 SMBJ17C-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ17C-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17C-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17C-E3/5B?
SMBJ17C-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17C-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 SMBJ17C-E3/5B?
For technical support, including SMBJ17C-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17C-E3/5B requirements.
6.How does Aetrix verify that SMBJ17C-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ17C-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 SMBJ17C-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ17C-E3/5B?
All SMBJ17C-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17C-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 SMBJ17C-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ17C-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ17C-E3/5B Tags
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