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Vishay General Semiconductor - Diodes Division SMBG170A-E3/5B
- Part No.:
- SMBG170A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG170A-E3/5B.pdf
- Description:
- TVS DIODE 170VWM 275VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,883
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Product details
Overview
SMBG170A-E3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for high-energy surge protection of DC power rails and signal lines. 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-grade reliability.
For engineers reviewing the SMBG170A-E3/5B datasheet, SMBG170A-E3/5B pinout, SMBG170A-E3/5B application, or SMBG170A-E3/5B equivalent, this page delivers verified electrical parameters, mechanical package details, real-world protection use cases, and validated alternative parts - all aligned with Vishay's official 88456 specification revision (09-Jan-2024).
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, responding to transients within picoseconds by entering avalanche conduction when reverse voltage exceeds VBR. Its glass-passivated junction ensures stable leakage and long-term reliability under repetitive surge stress.
Rated for -55 °C to +150 °C junction temperature, it delivers 600 W peak pulse power with 0.01 % duty cycle, derated linearly above 25 °C ambient per Fig. 2, and exhibits 100 °C/W junction-to-ambient thermal resistance on standard 5.0 mm × 5.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR (min/max) | 189 V / 209 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on across production lot. |
| VC @ IPPM | 275 V at 2.2 A - Clamped voltage during full 600 W transient; determines maximum stress on downstream ICs. |
| IPPM | 2.2 A - Peak pulse current capability under 10/1000 μs waveform; defines surge energy handling limit. |
| PPPM | 600 W - Peak pulse power rating; enables protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount gull-wing, matte tin-plated leads, RoHS-compliant (E3 suffix), MSL Level 1 (260 °C peak reflow). Cathode indicated by band; 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 VREV > VBR. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against automotive load-dump and inductive switching transients without derating. |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body control, and ADAS modules requiring zero-failure field performance. |
| Glass-passivated junction | Ensures stable VBR and low leakage (<1.0 μA at VWM) over 15-year service life in harsh environments. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD, lightning-induced surges). |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; simplifies SMT manufacturing flow. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V CAN bus power supply against load dump pulses per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery rail and DC/DC input. Use Value: Limits transient voltage to ≤275 V, preventing damage to upstream regulators and ensuring system reset immunity. |
Use Scenario: Safeguarding analog output lines of pressure sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Parallel-connected TVS on 4–20 mA current loop outputs exposed to motor drive noise. Use Value: Clamps induced spikes to <275 V within <1 ns, preserving sensor accuracy and avoiding false fault triggers. |
| Telecom DC Feeder Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding PoE-powered Ethernet switch DC input from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-stage TVS on 48 V DC input before secondary regulation and isolation. Use Value: Absorbs up to 600 W of surge energy while maintaining VC below 275 V, meeting IEC 61000-4-5 Level 4. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in smart home vacuum cleaners. IC Role / Device Role / Timing Role: Across-motor TVS connected between H-bridge output terminals and ground. Use Value: Prevents MOSFET avalanche failure by clamping inductive kick to ≤275 V, extending motor driver 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 |
|---|---|---|---|
| SMBG170A-M3/5B | Halogen-free molding compound; identical electrical specs and AEC-Q101 qualification. | No difference in circuit behavior; selected where halogen-free compliance is mandated (e.g., EU industrial equipment). | Direct material substitute when RoHS + halogen-free requirements apply; same footprint and thermal profile. |
| SMBG170AHM3/5B | AEC-Q101 qualified + halogen-free + high-reliability screening (per JESD22-B102 whisker test). | Targeted at mission-critical automotive subsystems (e.g., ADAS camera power) requiring extended reliability validation. | Preferred for Tier-1 automotive BOMs where enhanced process controls and traceability are required beyond baseline AEC-Q101. |
Compared with SMBG170A-E3/5B, SMBG170A-M3/5B offers identical protection performance with halogen-free construction, while SMBG170AHM3/5B adds whisker-test validation and tighter process controls - making it suitable for safety-critical automotive nodes where long-term solder joint integrity is paramount.
Availability
SMBG170A-E3/5B is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom DC feeder systems, and consumer appliance motor drives requiring stable component supply and AEC-Q101 assurance.
Supply support for SMBG170A-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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive qualification.
The SMBG series is engineered for high-energy transient suppression in space-constrained, high-reliability applications - particularly automotive power distribution, industrial I/O, and telecom infrastructure where consistent clamping and long-term stability are critical.
FAQ
What is the clamping voltage of SMBG170A-E3/5B at its rated peak pulse current?
The SMBG170A-E3/5B has a maximum clamping voltage (VC) of 275 V at its peak pulse current (IPPM) of 2.2 A, measured under the standardized 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during a full-rated surge event and is confirmed in Table 1 of Vishay document 88456 (Rev. 09-Jan-2024). The SMBG170A-E3/5B maintains this clamping performance across its qualified temperature range.
Is SMBG170A-E3/5B suitable for automotive applications?
Yes, SMBG170A-E3/5B is AEC-Q101 qualified per Vishay's documentation (note "(1) AEC-Q101 qualified" on page 3), confirming its suitability for automotive powertrain, body electronics, and ADAS systems. It meets stress tests including high-temperature operating life, temperature cycling, and ESD. The SMBG170A-E3/5B also complies with MSL Level 1 and RoHS, supporting automated SMT assembly in automotive manufacturing lines.
What is the standoff voltage (VWM) and why does it matter for SMBG170A-E3/5B?
The standoff voltage (VWM) of SMBG170A-E3/5B is 170 V - the maximum continuous reverse voltage it can block without significant leakage or clamping action. This parameter ensures the SMBG170A-E3/5B remains non-conductive during normal operation of a 24 V or 48 V system with margin, preventing power loss or false triggering. Exceeding VWM risks premature conduction and accelerated wear.
How does the SMBG170A-E3/5B differ from bidirectional variants like SMBG170CA?
The SMBG170A-E3/5B is unidirectional and features a cathode band for polarity-sensitive placement; SMBG170CA is bidirectional with no polarity marking and symmetrical clamping in both directions. Electrically, SMBG170A-E3/5B has forward voltage drop (~3.5 V at 50 A), while SMBG170CA does not conduct forward. The SMBG170A-E3/5B is used where DC polarity is fixed (e.g., battery rails); SMBG170CA suits AC or differential signal lines.
What package type and mounting details apply to SMBG170A-E3/5B?
SMBG170A-E3/5B uses the SMBG (DO-215AA) package: surface-mount gull-wing with 0.235–0.255 inch length, 0.130–0.155 inch width, and 0.075–0.095 inch height. It requires 5.0 mm × 5.0 mm copper pads per terminal (per Fig. 2 derating note), matte tin-plated leads compliant with J-STD-002, and supports reflow up to 260 °C (MSL Level 1). The SMBG170A-E3/5B is supplied in 13-inch tape-and-reel (3200 units/reel, code 5B).
SMBG170A-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:
- 1
- Bidirectional Channels:
- -
- 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)
SMBG170A-E3/5B FAQ
1.How can I place an order for SMBG170A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG170A-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 SMBG170A-E3/5B reliable?
The price and inventory of SMBG170A-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 SMBG170A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG170A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG170A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG170A-E3/5B?
SMBG170A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG170A-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 SMBG170A-E3/5B?
For technical support, including SMBG170A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG170A-E3/5B requirements.
6.How does Aetrix verify that SMBG170A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG170A-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 SMBG170A-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG170A-E3/5B?
All SMBG170A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG170A-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 SMBG170A-E3/5B part is unused and in its original packaging.
Return procedure for SMBG170A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG170A-E3/5B Tags
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Diodes Incorporated
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