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Vishay General Semiconductor - Diodes Division SMBG17HE3/52
- Part No.:
- SMBG17HE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG17HE3/52.pdf
- Description:
- TVS DIODE 17VWM 30.5VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,615
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Product details
Overview
SMBG17HE3/52 from Vishay General Semiconductor is a uni-directional transient voltage suppressor (TVS) diode in DO-215AA (SMBG) package, designed for clamping inductive switching surges and ESD events on power rails and signal lines. It features 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, and 600 W peak pulse power rating with 10/1000 µs waveform.
For engineers reviewing the SMBG17HE3/52 datasheet, SMBG17HE3/52 pinout, SMBG17HE3/52 application, or SMBG17HE3/52 equivalent, this device is selected for automotive-grade overvoltage protection where AEC-Q101 qualification, low clamping ratio, and robust surge handling are required - especially in 12 V battery-fed ECUs, sensor interfaces, and DC-DC input stages.
Technical Context
This TVS operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (<1 µA leakage at 17 V), then rapidly avalanches near its specified VBR to divert transient energy away from downstream circuitry. Its glass-passivated junction ensures stable breakdown and long-term reliability under repetitive surge stress.
The device 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 260 °C lead-free reflow compatibility - confirming suitability for automated SMT assembly in harsh-environment automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17 V - Maximum continuous reverse voltage before significant leakage; sets upper limit for protected line's nominal operating range. |
| VBR (Breakdown Voltage) | 18.9–20.9 V at 1 mA - Tight tolerance ensures predictable turn-on during transients without premature conduction. |
| VC (Clamping Voltage) | 27.6 V at IPPM = 21.7 A - Defines worst-case voltage seen by protected IC during 600 W surge; clamping ratio = VC/VWM ≈ 1.62. |
| PPPM (Peak Pulse Power) | 600 W with 10/1000 µs waveform - Validates capability to absorb common lightning/inductive-switching energy per IEC 61000-4-5. |
| IFSM (Surge Current) | 100 A (8.3 ms half-sine) - Confirms resilience against single-event load dump or alternator surge in automotive 12 V systems. |
| TJ max. | +150 °C - Enables operation in engine bay or under-hood modules without thermal derating penalties. |
| Qualification | AEC-Q101 qualified - Required for automotive electronics; validates reliability under temperature cycling, humidity, and mechanical stress. |
Pinout & Package
Package: DO-215AA (SMBG), surface-mount gull-wing, RoHS-compliant, matte tin-plated leads. Cathode indicated by band on one end; anode is unmarked opposite end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts avalanche current to ground during overvoltage event. |
| Anode (unmarked end) | Reference node | Typically tied to system ground or low-impedance return path; completes shunt path for surge diversion. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against severe transients like ISO 7637-2 Pulse 5a (load dump) without derating in compact SMBG footprint. |
| AEC-Q101 qualification | Validates long-term reliability for automotive control units, including thermal cycling, HAST, and mechanical shock testing. |
| Glass passivated junction | Ensures stable VBR over time and temperature, minimizing drift in critical clamping performance across life cycle. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT processes without preconditioning or special handling requirements. |
| Low clamping ratio (VC/VWM ≈ 1.62) | Minimizes overvoltage stress on downstream MOSFETs or ICs during clamping - critical for 20 V-rated components. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input |
|---|---|
Use Scenario: Protects microcontroller GPIO and CAN transceiver power pins from load dump and relay coil flyback in BCMs. IC Role / Device Role: Shunt-type transient suppressor placed between 12 V rail and chassis ground. Use Value: Clamps 12 V rail to ≤27.6 V during 100 V/100 ms load dump events, preventing latch-up or damage to 3.3 V/5 V logic supplies. |
Use Scenario: Shields 24 V digital input circuits from inductive kickback when interfacing solenoids or contactors. IC Role / Device Role: Primary overvoltage clamp on field-side input terminal before optocoupler or Schmitt trigger. Use Value: Limits transient voltage to <28 V, ensuring reliable detection margin above 24 V nominal while avoiding false triggering. |
| Automotive Sensor Interface (e.g., ABS Wheel Speed) | Telecom Power Supply Input |
Use Scenario: Guards analog front-end of Hall-effect or magnetoresistive wheel speed sensors exposed to motor noise and ESD. IC Role / Device Role: Low-capacitance (≈100 pF typical) uni-directional TVS on VDD line upstream of LDO regulator. Use Value: Suppresses ±15 kV ESD (IEC 61000-4-2) and 40 V/500 ms transients without distorting low-level sensor signals. |
Use Scenario: Front-end protection for AC/DC adapter input stage subjected to lightning-induced surges on telecom building wiring. IC Role / Device Role: Secondary clamping device after MOV, providing precise voltage limiting before bridge rectifier. Use Value: Delivers consistent 27.6 V clamping independent of aging or temperature drift - unlike MOVs - improving long-term surge immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17A-E3/52 | Same VWM (17 V), identical DO-214AA (SMB) package but lower PPPM (600 W same), slightly higher VC (28.8 V at 21.2 A). | Not AEC-Q101 qualified; intended for commercial/industrial use only. | Select SMBJ17A-E3/52 only if automotive qualification is not required and PCB layout allows SMB (not SMBG) footprint. |
| SMBG17CA-E3/52 | Bi-directional variant with same VWM (17 V); symmetric clamping in both polarities; VC = 27.6 V (same magnitude) but bidirectional conduction. | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where polarity reversal occurs. | Choose SMBG17CA-E3/52 when protecting differential buses or ungrounded inputs; SMBG17HE3/52 is strictly for DC-rail protection. |
Compared with SMBJ17A-E3/52, SMBG17HE3/52 provides automotive-grade reliability and identical clamping performance in a mechanically distinct SMBG package; versus SMBG17CA-E3/52, it offers lower cost and simpler biasing for unidirectional DC rails but cannot handle reverse-polarity transients.
Availability
SMBG17HE3/52 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom power supply designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBG17HE3/52 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, precision, and automotive-grade qualification.
The SMBG series was developed specifically for high-reliability transient suppression in space-constrained automotive and industrial environments, balancing high surge capability with AEC-Q101 compliance and SMT manufacturability.
FAQ
What is the clamping voltage of SMBG17HE3/52 and how is it measured?
The SMBG17HE3/52 has a maximum clamping voltage (VC) of 27.6 V, measured at a peak pulse current (IPPM) of 21.7 A using a 10/1000 µs waveform. This value represents the worst-case voltage imposed on the protected circuit during a standardized surge event and is confirmed per ANSI/IEEE C62.35 test conditions in the Vishay datasheet.
Is SMBG17HE3/52 suitable for automotive applications?
Yes, SMBG17HE3/52 is AEC-Q101 qualified and explicitly rated for automotive use. Its construction - including glass-passivated junction, MSL Level 1 reflow compatibility, and operating temperature range of –55 °C to +150 °C - meets stringent requirements for engine control units, body electronics, and ADAS sensor modules.
What does the "HE3" suffix mean in SMBG17HE3/52?
The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. It distinguishes this automotive-grade version from the commercial "E3" variant (e.g., SMBG17A-E3/52), which lacks AEC-Q101 certification and uses Class 1A whisker testing.
How does SMBG17HE3/52 differ from SMBG17CA-E3/52?
SMBG17HE3/52 is uni-directional and protects only positive-going transients on grounded DC rails; SMBG17CA-E3/52 is bi-directional and clamps both polarities, making it suitable for AC lines or differential buses like CAN or RS-485. Their VWM, VBR, and VC values are identical in magnitude, but conduction behavior differs fundamentally.
What is the thermal resistance of SMBG17HE3/52 and why does it matter?
The SMBG17HE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads. This value determines how much the junction temperature rises under sustained power dissipation - critical for verifying safe operation during repetitive surges or elevated ambient temperatures in enclosed automotive housings.
SMBG17HE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB Gull Wing
- 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 (SMBG)
SMBG17HE3/52 FAQ
1.How can I place an order for SMBG17HE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG17HE3/52 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 SMBG17HE3/52 reliable?
The price and inventory of SMBG17HE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG17HE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG17HE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG17HE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG17HE3/52?
SMBG17HE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG17HE3/52 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 SMBG17HE3/52?
For technical support, including SMBG17HE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG17HE3/52 requirements.
6.How does Aetrix verify that SMBG17HE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG17HE3/52 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 SMBG17HE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG17HE3/52?
All SMBG17HE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG17HE3/52, 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 SMBG17HE3/52 part is unused and in its original packaging.
Return procedure for SMBG17HE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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