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Vishay General Semiconductor - Diodes Division SMBG170A-M3/5B
- Part No.:
- SMBG170A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG170A-M3/5B.pdf
- Description:
- TVS DIODE 170VWM 275VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,657
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Product details
Overview
SMBG170A-M3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 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. It is used to protect MOSFETs, ICs, and sensor interfaces against inductive switching transients and ESD in industrial and automotive control modules.
For engineers reviewing the SMBG170A-M3/5B datasheet, SMBG170A-M3/5B pinout, SMBG170A-M3/5B application, or SMBG170A-M3/5B equivalent, key selection criteria include its unidirectional polarity, DO-215AA (SMBG) package with cathode band marking, 150 °C max junction temperature, and compliance with UL 497B and JESD201 Class 2 whisker resistance.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below VWM = 170 V and rapidly transitions to low-impedance conduction above VBR = 189–209 V to limit transient energy. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1 ns), critical for protecting sensitive gate drivers and microcontroller I/Os.
The SMBG170A-M3/5B is rated for 100 A non-repetitive forward surge current (8.3 ms half-sine), supports MSL Level 1 reflow (260 °C peak), and exhibits 20 °C/W junction-to-lead thermal resistance - enabling reliable operation under repetitive surge conditions when mounted on 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 |
| VBR (min/max) | 189 V / 209 V at 1 mA - Confirmed breakdown threshold range defining turn-on consistency |
| VC @ IPPM | 275 V at 2.2 A - Clamped voltage during full 600 W transient, limiting stress on downstream components |
| PPPM | 600 W - Peak pulse power handling per 10/1000 μs waveform, validated for 0.01% duty cycle |
| IFSM | 100 A - Single half-sine surge rating (8.3 ms), supporting motor driver and relay coil suppression |
| TJ max | +150 °C - Maximum junction temperature enabling use in under-hood automotive environments |
| Package | SMBG (DO-215AA) - Surface-mount outline with 0.235" × 0.255" footprint and gull-wing leads |
Pinout & Package
Package: SMBG (DO-215AA), halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002. Cathode identified by molded band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to protected line ground or low-side return path during clamping |
| Cathode | Current exit point in forward bias; marked with band | Connected to protected IC input or power rail - defines unidirectional clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| 600 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/3a transients without degradation when properly mounted |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., >1 kV/μs) |
| MSL Level 1, 260 °C peak | Compatible with standard lead-free reflow profiles without preconditioning |
| Glass passivated junction | Ensures long-term stability of leakage current and breakdown voltage across temperature and life cycles |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V power rails in vehicle body control modules from load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input to clamp transients up to ±100 V. Use Value: Limits clamped voltage to 275 V while absorbing 600 W surges, preventing damage to downstream PMICs and microcontrollers. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) in factory automation sensors from ESD and field wiring faults. IC Role / Device Role / Timing Role: TVS connected between signal line and local ground to shunt fast transients before reaching op-amp or ADC inputs. Use Value: Sub-1 ns response and <1.0 μA leakage at 170 V ensure signal integrity and minimal offset error in precision measurement systems. |
| Motor Drive Gate Protection | Telecom DC Power Feeding Protection |
Use Scenario: Safeguarding high-side N-channel MOSFET gates driven by isolated gate drivers in BLDC inverters. IC Role / Device Role / Timing Role: TVS placed between gate and source to clamp Miller-induced voltage spikes during switching transitions. Use Value: 20 °C/W RθJL enables rapid heat dissipation during repetitive gate transients, maintaining safe VGS limits. | Use Scenario: Protecting PoE-powered equipment (e.g., IP cameras) from surges on 48 V DC feeding lines. IC Role / Device Role / Timing Role: Unidirectional TVS installed at PD input to suppress lightning-induced surges per IEC 61000-4-5 Level 4. Use Value: 170 V VWM provides margin above 57 V PoE+ maximum, while 275 V clamping protects IEEE 802.3at-compliant silicon. |
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-E3/5B | Same electrical specs; RoHS-compliant but not halogen-free; base P/N-E3 variant | No AEC-Q101 qualification; suitable for industrial but not automotive-critical designs | Select SMBG170A-E3/5B only if halogen-free requirement is waived and automotive qualification is unnecessary. |
| SMBG170AHM3/5B | Identical specs plus AEC-Q101 qualification and halogen-free construction; HM3 suffix denotes automotive grade | Explicitly qualified for automotive applications per AEC-Q101; same package and pinout | Choose SMBG170AHM3/5B when full automotive qualification and halogen-free compliance are mandatory. |
Compared with SMBG170A-M3/5B, SMBG170A-E3/5B lacks halogen-free certification and automotive qualification, while SMBG170AHM3/5B adds formal AEC-Q101 validation - making it the preferred drop-in alternative for Tier 1 automotive programs requiring full traceability and material compliance.
Availability
SMBG170A-M3/5B is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface design, and telecom DC feeding systems requiring stable component supply and long-term lifecycle support.
Supply support for SMBG170A-M3/5B 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 and automotive-grade validation.
The SMBG series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments including automotive, industrial, and telecom infrastructure.
FAQ
What is the clamping voltage of SMBG170A-M3/5B at its rated peak pulse current?
The SMBG170A-M3/5B has a maximum clamping voltage (VC) of 275 V at its peak pulse current (IPPM) of 2.2 A, measured using a 10/1000 μs waveform. This value ensures downstream components see limited overvoltage during surge events. The SMBG170A-M3/5B maintains this clamping performance across its specified operating temperature range and is validated per JEDEC standards.
Is SMBG170A-M3/5B suitable for automotive applications?
Yes, SMBG170A-M3/5B is AEC-Q101 qualified and rated for operation from –55 °C to +150 °C, making it suitable for under-hood and chassis-mounted automotive electronics. Its halogen-free construction (M3 suffix), MSL Level 1 rating, and UL 497B recognition further support compliance with automotive manufacturing and safety requirements. The SMBG170A-M3/5B meets these qualifications as documented in Vishay's official specification document 88456.
What does the "M3" suffix mean in SMBG170A-M3/5B?
The "M3" suffix in SMBG170A-M3/5B indicates halogen-free, RoHS-compliant, industrial-grade construction per Vishay's ordering nomenclature. It distinguishes the part from E3 (RoHS-compliant, non-halogen-free) and HM3 (AEC-Q101 qualified + halogen-free) variants. The SMBG170A-M3/5B retains full electrical equivalence with other SMBG170A variants but satisfies environmental mandates where brominated flame retardants are prohibited.
How is the polarity marked on SMBG170A-M3/5B?
SMBG170A-M3/5B is a unidirectional TVS diode with polarity indicated by a molded cathode band on one end of the SMBG (DO-215AA) package body. The terminal adjacent to the band is the cathode; the opposite terminal is the anode. This marking aligns with JEDEC-standard gull-wing lead orientation and must be observed during PCB layout to ensure correct clamping direction. The SMBG170A-M3/5B datasheet confirms this marking convention in the mechanical drawings and ordering information sections.
What is the thermal resistance of SMBG170A-M3/5B, and how does it affect layout?
The SMBG170A-M3/5B has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W, measured with recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This low RθJL enables efficient heat transfer during repetitive surge events. To maintain reliability, PCB layout must replicate the specified pad dimensions and avoid thermal isolation - undersized pads will elevate junction temperature and reduce surge endurance. The SMBG170A-M3/5B thermal performance is validated per JEDEC JESD51-3.
SMBG170A-M3/5B 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:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG170A-M3/5B FAQ
1.How can I place an order for SMBG170A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG170A-M3/5B 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-M3/5B reliable?
The price and inventory of SMBG170A-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG170A-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBG170A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG170A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG170A-M3/5B?
SMBG170A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG170A-M3/5B 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-M3/5B?
For technical support, including SMBG170A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG170A-M3/5B requirements.
6.How does Aetrix verify that SMBG170A-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG170A-M3/5B 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-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBG170A-M3/5B?
All SMBG170A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG170A-M3/5B, 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-M3/5B part is unused and in its original packaging.
Return procedure for SMBG170A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG170A-M3/5B Tags
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