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Vishay General Semiconductor - Diodes Division SMBJ17HE3/5B
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- Part No.:
- SMBJ17HE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17HE3/5B.pdf
- Description:
- TVS DIODE 17VWM 30.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,280
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Product details
Overview
SMBJ17HE3/5B 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 sensitive electronics. It features a 17 V standoff voltage (VWM), 18.9–20.9 V breakdown range (VBR at 1 mA), 27.6 V clamping voltage (VC) at 21.7 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines of industrial sensor interfaces.
For engineers reviewing the SMBJ17HE3/5B datasheet, SMBJ17HE3/5B pinout, SMBJ17HE3/5B application, or SMBJ17HE3/5B equivalent, this device serves as a primary clamping element in DC power input stages, automotive body control modules, and Ethernet PHY protection circuits where fast response (<1 ps), low clamping ratio (VC/VBR ≈ 1.4), and AEC-Q101 qualification are critical selection criteria.
Technical Context
This unidirectional TVS diode operates as a reverse-biased avalanche clamp: under normal conditions it presents <1 µA leakage at 17 V; when transient voltage exceeds VBR (min 18.9 V), it avalanches into low-impedance conduction to limit voltage across protected circuitry. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
Thermal design relies on its RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), requiring minimum 5.0 mm × 5.0 mm copper pads per terminal for full 600 W rating. The cathode band marking identifies polarity, and the device meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse operating voltage before significant leakage; defines upper limit of protected line's steady-state voltage. |
| VBR (min/max) | 18.9 V / 20.9 V at 1 mA - guaranteed avalanche initiation range; ensures predictable turn-on margin above VWM. |
| VC @ IPPM | 27.6 V at 21.7 A - clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 600 W - peak pulse power handling capability; enables suppression of high-energy transients like ISO 7637-2 Pulse 1/2a/5a. |
| IFSM | 100 A - non-repetitive forward surge current rating (8.3 ms half-sine); supports inrush or fault-current limiting in power inputs. |
| TJ max | +150 °C - maximum junction temperature; allows operation in under-hood automotive or industrial enclosures without derating. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; suffix "HE3" confirms qualification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), cathode band marked on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return plane; carries full surge current during clamping event. |
| Cathode | Protected line connection | Connected to line being protected (e.g., 12 V rail, RS-485 bus); voltage referenced to anode during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with ISO 7637-2 and IEC 61000-4-5 Level 3/4 surge immunity requirements without external series impedance. |
| Clamping voltage ≤27.6 V at 21.7 A | Provides >2.4 V margin below 30 V absolute maximum rating of common 24 V industrial microcontrollers and CAN transceivers. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including BCM, lighting control, and ADAS sensor interfaces with zero infant mortality failure mode analysis. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements prior to placement. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage drift over 15+ year field life in humid or thermally cycled environments. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
|
Use Scenario: 12 V battery feed to body control module exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role: Primary shunt clamp on main power rail upstream of DC/DC converter input. Use Value: Limits transient voltage to ≤27.6 V, preventing latch-up or gate oxide damage in buck controller ICs rated for 36 V max input. |
Use Scenario: RS-485 differential pair in factory automation PLC I/O module subjected to ESD and cable discharge events. IC Role / Device Role: Unidirectional TVS placed between each data line and ground, with cathode tied to signal line. Use Value: Clamps fast-rising transients (<1 ns rise time) while maintaining <1 µA leakage at 5 V common-mode, preserving signal integrity. |
| Telecom DC Power Feeder Protection | Consumer Appliance Motor Drive Surge Suppression |
|
Use Scenario: -48 V DC power input to telecom remote radio head exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role: Cathode connected to -48 V rail, anode to chassis ground; suppresses negative-going transients relative to ground. Use Value: Handles 600 W pulses without degradation, meeting Telcordia GR-1089-CORE Level 3 surge immunity for central office equipment. |
Use Scenario: 24 V supply to BLDC motor driver in smart washing machine, subject to inductive kickback from relay switching and brush commutation. IC Role / Device Role: Mounted across motor driver H-bridge supply pins to clamp flyback energy during PWM dead-time transitions. Use Value: Fast response (<1 ps) and low dynamic impedance reduce voltage overshoot, protecting MOSFETs rated for 40 V VDSS. |
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 | Commercial-grade (non-AEC-Q101), same VWM/VBR/VC, identical SMB package and pinout. | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and lifecycle traceability is not required. |
| SAC17-03 | Same VWM (17 V), but lower PPPM (400 W), higher VC (30.5 V), and DO-214AC (SMA) package with larger footprint. | Lower surge capacity and less compact layout; requires larger PCB area and may not meet ISO 7637-2 Pulse 5a. | Choose only if SMB footprint is unavailable and 400 W rating suffices for targeted threat level. |
Compared with SMBJ17HE3/5B, SMBJ17A-E3/5B offers identical electrical performance at lower cost but no automotive qualification, while SAC17-03 trades surge robustness and board space efficiency for legacy package compatibility - making SMBJ17HE3/5B optimal for new AEC-Q101-compliant designs demanding highest clamping precision and smallest footprint.
Availability
SMBJ17HE3/5B is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and telecom power feeder protection requiring stable component supply, AEC-Q101 traceability, and consistent surge performance across production lots.
Supply support for SMBJ17HE3/5B 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, MOSFETs, and protection devices with emphasis on reliability, thermal performance, and application-specific validation.
The SMBJ series targets high-reliability transient suppression in automotive, industrial, and telecom systems, with HE3 variants specifically engineered to meet AEC-Q101 stress test requirements while maintaining tight VBR tolerances and low clamping ratios.
FAQ
What is the clamping voltage of SMBJ17HE3/5B at its rated peak pulse current?
The SMBJ17HE3/5B has a maximum clamping voltage (VC) of 27.6 V at its rated peak pulse current (IPPM) of 21.7 A, measured using the standardized 10/1000 µs double-exponential surge waveform. This value is guaranteed across temperature and ensures protected ICs see no more than 27.6 V during worst-case transient events. The SMBJ17HE3/5B maintains this clamping performance due to its low incremental surge resistance and optimized silicon junction design.
Is SMBJ17HE3/5B suitable for bidirectional transient protection?
No, SMBJ17HE3/5B is a unidirectional TVS diode, intended for protection of DC lines with defined polarity - cathode connects to the line being protected, anode to ground. For bidirectional applications such as AC lines or differential data buses, Vishay specifies the CA-suffix variant (e.g., SMBJ17CA). Using SMBJ17HE3/5B in bidirectional configurations risks forward conduction during negative transients and inadequate protection.
Does SMBJ17HE3/5B require a heatsink for 600 W pulse handling?
No external heatsink is required for single-pulse 600 W operation, provided the PCB uses the recommended minimum 5.0 mm × 5.0 mm copper pad per terminal. The SMBJ17HE3/5B achieves its full 600 W rating through thermal conduction into the PCB copper, leveraging its RθJL = 20 °C/W. However, repetitive pulsing above 0.01% duty cycle requires thermal derating per Figure 2 in the datasheet, and sustained power dissipation remains limited to 5.0 W at 50 °C ambient.
How does the HE3 suffix affect the specifications of SMBJ17HE3/5B?
The HE3 suffix on SMBJ17HE3/5B denotes RoHS-compliant construction with full AEC-Q101 qualification, including stress testing for temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge. Electrically, SMBJ17HE3/5B matches SMBJ17A-E3/5B in all key parameters (VWM, VBR, VC, PPPM), but adds automotive-grade traceability, extended lifetime validation, and enhanced process controls - critical for Tier 1 automotive suppliers requiring PPAP documentation.
What is the maximum reverse leakage current of SMBJ17HE3/5B at its standoff voltage?
At its maximum working voltage (VWM) of 17 V and ambient temperature of 25 °C, the SMBJ17HE3/5B exhibits a maximum reverse leakage current (ID) of 1.0 µA. This low leakage ensures minimal power loss in always-on systems and prevents false triggering in high-impedance sensing circuits. Leakage remains below 5.0 µA up to 125 °C, supporting reliable operation in under-hood automotive environments.
SMBJ17HE3/5B 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:
- 1
- Bidirectional Channels:
- -
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ17HE3/5B FAQ
1.How can I place an order for SMBJ17HE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17HE3/5B 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 SMBJ17HE3/5B reliable?
The price and inventory of SMBJ17HE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ17HE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ17HE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17HE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17HE3/5B?
SMBJ17HE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17HE3/5B 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 SMBJ17HE3/5B?
For technical support, including SMBJ17HE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17HE3/5B requirements.
6.How does Aetrix verify that SMBJ17HE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ17HE3/5B 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 SMBJ17HE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ17HE3/5B?
All SMBJ17HE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17HE3/5B, 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 SMBJ17HE3/5B part is unused and in its original packaging.
Return procedure for SMBJ17HE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ17HE3/5B Tags
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