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Vishay General Semiconductor - Diodes Division SMBG170CA-E3/5B
- Part No.:
- SMBG170CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG170CA-E3/5B.pdf
- Description:
- TVS DIODE 170VWM 275VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,354
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Product details
Overview
SMBG170CA-E3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of sensitive electronics. It features 170 V stand-off voltage (VWM), 189–209 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), clamping voltage of 275 V at 2.2 A, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMBG170CA-E3/5B datasheet, SMBG170CA-E3/5B pinout, SMBG170CA-E3/5B application, or SMBG170CA-E3/5B equivalent, key selection criteria include bidirectional surge clamping performance, junction temperature range (−55 °C to +150 °C), low incremental surge resistance, UL 497B recognition, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector, responding within picoseconds to transients induced by inductive switching or ESD events. Its bidirectional symmetry enables protection of AC-coupled or differential signal lines without polarity constraints, and its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and repeatable clamping behavior under repetitive surges.
The SMBG170CA-E3/5B is rated for 600 W peak pulse power per 10/1000 µs waveform at 0.01% duty cycle, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead). It meets MSL Level 1 per J-STD-020 and supports lead-free reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 12 V–48 V DC bus or 100 V AC line interfaces. |
| VBR (min/max) | 189 V / 209 V at 1 mA - Confirmed breakdown threshold ensures reliable triggering above normal operating peaks while avoiding false trips. |
| VC @ IPPM | 275 V at 2.2 A - Clamping voltage limits downstream component stress during 600 W transient events; critical for MOSFET gate or MCU I/O protection. |
| PPPM | 600 W - Peak surge power handling capability with 10/1000 µs waveform; validated for automotive load-dump and ISO 7637-2 Pulse 5a compliance. |
| ID @ VWM | <1.0 µA - Ultra-low reverse leakage preserves signal integrity and battery life in always-on sensor nodes or low-power telemetry circuits. |
| TJ Range | −55 °C to +150 °C - Extended junction temperature rating supports under-hood automotive, industrial motor drives, and outdoor telecom equipment. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile gull-wing configuration with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking - bidirectional operation confirmed.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Conducts surge current toward ground when voltage exceeds VBR in either polarity; symmetric with cathode for bidirectional clamping. |
| Cathode | Transient current entry (negative half-cycle) | Functions identically to anode under reverse bias; no functional distinction - both terminals serve as interchangeable surge current paths. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control units and ADAS sensors. |
| UL 497B recognized (QVGQ2) | Meets Underwriters Laboratories requirements for telecom and data line protectors - enables certification of end-equipment without additional system-level testing. |
| 600 W peak pulse power | Handles high-energy transients such as ISO 7637-2 Pulse 5a (load dump) without degradation - eliminates need for cascaded protection stages. |
| MSL Level 1, 260 °C peak | Compatible with standard lead-free reflow profiles - supports high-yield automated assembly without moisture sensitivity concerns. |
| Glass passivated junction | Ensures stable VBR tolerance (±5%), low leakage, and long-term parameter stability across thermal and humidity stress. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V vehicle power rails against load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Shunt clamping TVS placed upstream of DC-DC converters and microcontrollers. Use Value: Limits rail voltage to ≤275 V during 600 W surges, preventing latch-up or permanent damage to downstream PMICs and CAN transceivers. | Use Scenario: Safeguarding analog outputs and digital I/O of pressure, temperature, or position sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional transient suppressor on 4–20 mA current loop or RS-485 differential pair lines. Use Value: Clamps fast-rising ESD (IEC 61000-4-2) and inductive kickback (IEC 61000-4-4) without distorting low-level sensor signals due to sub-µA leakage. |
| Telecom Data Line Surge Suppression | Consumer Device USB/Type-C Port Protection |
Use Scenario: Protecting Ethernet PHYs, DSL line drivers, or PoE injectors from lightning-induced surges on twisted-pair cables. IC Role / Device Role / Timing Role: Primary-level bidirectional TVS on differential pairs, coordinated with secondary GDT or polymer PTC devices. Use Value: Responds in <1 ps to clamp common-mode transients up to 600 W, preserving signal integrity while meeting UL 497B telecom safety requirements. | Use Scenario: Overvoltage protection for USB 2.0/3.x and USB-C receptacles exposed to accidental 12 V/20 V adapter misconnection or ESD. IC Role / Device Role / Timing Role: Standoff-rated TVS on VBUS and CC lines, placed adjacent to connector to minimize trace inductance. Use Value: Withstands 170 V continuous VBUS operation while clamping 8 kV contact ESD to <275 V - prevents damage to USB controller ICs and port power switches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CA-E3/5B | Same VWM/VBR/VC, but lower PPPM = 600 W (same rating), different package: SMB (DO-214AA); slightly larger footprint and higher RθJA (110 °C/W). | Less suitable for space-constrained automotive modules; requires larger PCB pad layout and exhibits higher thermal rise under sustained surge duty. | Select SMBG170CA-E3/5B when board area is limited or thermal performance on small copper pads is critical. |
| SMCJ170CA-E3/5B | Same electrical specs, but larger SMC (DO-214AB) package; PPPM = 1500 W, RθJA = 40 °C/W, higher IPPM (5.0 A). | Better suited for high-reliability industrial power supplies where higher single-pulse energy absorption is required, but incompatible with fine-pitch SMT lines. | Choose SMBG170CA-E3/5B for automotive body electronics or compact consumer designs needing AEC-Q101 + tight footprint. |
Compared with SMBJ170CA-E3/5B and SMCJ170CA-E3/5B, the SMBG170CA-E3/5B delivers identical clamping performance in a smaller DO-215AA outline with superior thermal resistance (100 °C/W vs. 110 °C/W) and AEC-Q101 qualification - making it optimal for next-generation automotive ECUs and miniaturized industrial sensors.
Availability
SMBG170CA-E3/5B is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface design, and telecom data line protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMBG170CA-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 validation.
The SMBG series was engineered for high-density, high-reliability transient suppression in automotive and industrial environments - combining AEC-Q101 qualification, UL recognition, and optimized thermal performance in the DO-215AA package.
FAQ
What is the maximum clamping voltage of the SMBG170CA-E3/5B under peak surge conditions?
The SMBG170CA-E3/5B has a maximum clamping voltage (VC) of 275 V at 2.2 A peak pulse current (IPPM) using the 10/1000 µs waveform. This value is measured per JEDEC standards and ensures downstream components remain within safe voltage limits during standardized surge events. The SMBG170CA-E3/5B maintains this clamping performance across its full operating temperature range (−55 °C to +150 °C).
Is the SMBG170CA-E3/5B suitable for automotive applications?
Yes, the SMBG170CA-E3/5B is AEC-Q101 qualified and UL 497B recognized, making it suitable for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. Its bidirectional architecture, 170 V stand-off rating, and 600 W surge capability meet ISO 7637-2 Pulse 5a requirements. The SMBG170CA-E3/5B is specifically designed for under-hood and chassis-mounted systems requiring extended temperature operation and high reliability.
Does the SMBG170CA-E3/5B have polarity markings on the package?
No, the SMBG170CA-E3/5B does not have polarity markings because it is a bidirectional TVS diode. Both terminals function identically under positive or negative transient conditions, eliminating orientation concerns during placement. This simplifies PCB layout and automated assembly - unlike unidirectional variants (e.g., SMBG170A), the SMBG170CA-E3/5B has no cathode band or other visual polarity indicator.
What is the thermal resistance specification for the SMBG170CA-E3/5B?
The SMBG170CA-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W, measured on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. These values enable effective heat dissipation during repetitive surge events and support reliable operation at TJ up to +150 °C. The SMBG170CA-E3/5B's low RθJL also facilitates thermal coupling to ground planes or metal-core substrates.
How does the SMBG170CA-E3/5B compare to unidirectional TVS diodes with the same VWM?
The SMBG170CA-E3/5B provides symmetrical clamping for both polarities, unlike unidirectional types (e.g., SMBG170A) that only protect against reverse-biased transients. Its bidirectional structure allows use on AC lines, differential buses, or floating references without external polarity management. While both share identical VWM, VBR, and PPPM, the SMBG170CA-E3/5B omits the cathode band and exhibits matched forward/reverse characteristics - critical for protecting balanced interfaces like RS-485 or CAN FD.
SMBG170CA-E3/5B 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 275V
- Current - Peak Pulse (10/1000µs):
- 2.2A
- 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 (SMBG)
SMBG170CA-E3/5B FAQ
1.How can I place an order for SMBG170CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG170CA-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 SMBG170CA-E3/5B reliable?
The price and inventory of SMBG170CA-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 SMBG170CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG170CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG170CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG170CA-E3/5B?
SMBG170CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG170CA-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 SMBG170CA-E3/5B?
For technical support, including SMBG170CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG170CA-E3/5B requirements.
6.How does Aetrix verify that SMBG170CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG170CA-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 SMBG170CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG170CA-E3/5B?
All SMBG170CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG170CA-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 SMBG170CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBG170CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG170CA-E3/5B Tags
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