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Vishay General Semiconductor - Diodes Division SMBG188A-M3/52
- Part No.:
- SMBG188A-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG188A-M3/52.pdf
- Description:
- TVS DIODE 188VWM 328VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,799
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Product details
Overview
SMBG188A-M3/52 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 188 V stand-off voltage (VWM), 209–231 V breakdown voltage (VBR at 1 mA), 600 W peak pulse power (10/1000 μs), 2.0 A maximum reverse leakage at VWM, and clamps to 328 V at 2.0 A peak pulse current - deployed in automotive power electronics and industrial sensor interfaces.
For engineers reviewing the SMBG188A-M3/52 datasheet, SMBG188A-M3/52 pinout, SMBG188A-M3/52 application, or SMBG188A-M3/52 equivalent, key selection criteria include verified unidirectional polarity, AEC-Q101 qualification, halogen-free RoHS compliance (M3 suffix), MSL Level 1 rating, and thermal resistance (RθJA = 100 °C/W) under standard PCB pad layout.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, activating when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5 %), low incremental surge resistance, and fast response time (<1 ns), enabling effective suppression of ESD, lightning-induced surges, and inductive switching transients.
Rated for -55 °C to +150 °C junction temperature, it supports automotive-grade reliability with AEC-Q101 qualification and meets UL 497B recognition (QVGQ2). The SMBG (DO-215AA) package provides robust thermal dissipation via copper pad mounting and complies with J-STD-020 MSL Level 1 (260 °C peak reflow).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR (min/max) | 209 V / 231 V at 1 mA - Confirmed breakdown range ensuring predictable turn-on during overvoltage events. |
| VC @ IPPM | 328 V at 2.0 A - Clamping voltage under 600 W 10/1000 μs surge; determines maximum stress on downstream ICs. |
| IPPM | 2.0 A - Peak pulse current capability at rated clamping voltage; validates surge energy handling per waveform. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on 0.2" × 0.2" copper pads; guides PCB thermal design. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| Leakage @ VWM | 2.0 μA - Low reverse leakage preserves system efficiency and minimizes standby power loss. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, gull-wing leads, cathode band marked on case. Matte tin-plated terminals, compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-potential node; completes clamping path during positive transients. |
| Cathode | High-side input terminal | Connected to protected line (e.g., 12 V rail); band-marked end indicates polarity for unidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics per stress-test requirements (HTOL, TC, HAST, etc.). |
| Halogen-free & RoHS compliant (M3) | Meets IEC 61249-2-21 and JEDEC J-STD-201 Class 2 whisker resistance; supports green manufacturing. |
| 600 W peak pulse power (10/1000 μs) | Handles high-energy transients common in 24 V industrial systems and 12 V automotive battery lines. |
| MSL Level 1 (260 °C) | Enables single-reflow assembly without moisture sensitivity concerns; eliminates bake-out requirement. |
| Glass-passivated junction | Ensures stable VBR across temperature and lifetime; reduces parameter drift vs. epoxy-passivated alternatives. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in engine control units (ECUs) against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery feed and DC/DC converter input. Use Value: Limits transient voltage to ≤328 V, preventing damage to downstream PMICs and microcontrollers rated for 36 V absolute max. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Parallel-connected surge suppressor on 4–20 mA current loop or 0–10 V analog output line. Use Value: Maintains signal integrity by clamping induced surges below 328 V while adding <1 pF junction capacitance at 0 V bias. |
| Telecom DC Power Input Protection | OBD-II Diagnostic Port Protection |
Use Scenario: Securing 48 V DC input of remote radio head (RRH) power supplies against lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on bulk input stage ahead of active front-end rectification. Use Value: Absorbs 600 W pulses without degradation, meeting IEC 61000-4-5 Level 4 (4 kV) test requirements. | Use Scenario: Hardening vehicle OBD-II connector pins (pins 6/CAN-H, 14/CAN-L, 16/battery) against ESD and jump-start transients. IC Role / Device Role / Timing Role: Discrete TVS on each protected line, leveraging unidirectional polarity for battery-referenced clamping. Use Value: Provides sub-1 ns response to ±15 kV contact ESD (IEC 61000-4-2), preserving CAN transceiver functionality. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG188AHE3/52 | AEC-Q101 qualified, RoHS-compliant, E3 suffix (not halogen-free); same VWM, VBR, PPPM, and package. | Identical electrical performance but lacks halogen-free certification; suitable where green compliance is not mandated. | Select SMBG188AHE3/52 if AEC-Q101 and RoHS are required but halogen-free material is optional. |
| SMBJ188A-M3/52 | Same VWM (188 V), VBR (209–231 V), and PPPM (600 W), but in larger SMB (DO-214AA) package; RθJA = 85 °C/W vs. 100 °C/W. | Better thermal performance on standard layouts; requires larger PCB footprint and different pad geometry. | Choose SMBJ188A-M3/52 when higher power derating margin or legacy SMB footprint compatibility is needed. |
Compared with SMBG188AHE3/52, the SMBG188A-M3/52 adds halogen-free compliance without sacrificing AEC-Q101 or electrical specs; versus SMBJ188A-M3/52, it trades 15 °C/W higher thermal resistance for 30 % smaller board area and optimized automated placement in space-constrained modules.
Availability
SMBG188A-M3/52 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power supplies, and OBD-II diagnostic interfaces requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBG188A-M3/52 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, MOSFETs, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The SMBG series is engineered for surface-mount transient suppression in harsh environments - targeting AEC-Q101-compliant automotive subsystems and industrial equipment where compact size, high surge robustness, and process consistency are critical.
FAQ
What is the polarity configuration of SMBG188A-M3/52?
The SMBG188A-M3/52 is a unidirectional transient voltage suppressor diode. Its cathode is marked by a band on the SMBG (DO-215AA) package body, and it conducts only during reverse-biased overvoltage events - making it suitable for DC rail protection where polarity is fixed. This differs from bidirectional variants (e.g., SMBG188CA) that protect AC or dual-polarity signals.
Does SMBG188A-M3/52 meet automotive qualification standards?
Yes, SMBG188A-M3/52 is AEC-Q101 qualified, as confirmed in Vishay's official documentation (Document Number: 88456, Revision: 09-Jan-2024). This qualification covers stress tests including high-temperature operating life, temperature cycling, and humidity testing - validating its use in engine control, body electronics, and infotainment systems.
What is the clamping voltage of SMBG188A-M3/52 under surge conditions?
The SMBG188A-M3/52 clamps to 328 V at its rated peak pulse current of 2.0 A, measured using the standardized 10/1000 μs double-exponential waveform. This value is specified in the Electrical Characteristics table and defines the maximum voltage imposed on protected circuitry during a 600 W transient event.
How does the M3 suffix affect SMBG188A-M3/52 compliance and processing?
The M3 suffix denotes halogen-free, RoHS-compliant construction with matte tin-plated leads meeting J-STD-002 solderability and JESD 22-B102 whisker resistance (Class 2). It also confirms MSL Level 1 rating (260 °C peak reflow), enabling standard SMT assembly without pre-baking - distinguishing it from E3 (RoHS but not halogen-free) and HE3/HM3 (AEC-Q101 + RoHS/halogen-free) variants.
Can SMBG188A-M3/52 be used in bidirectional signal protection?
No, SMBG188A-M3/52 is strictly unidirectional and must not be used for bidirectional signal lines such as USB, CAN, or Ethernet. For those applications, Vishay specifies bidirectional variants with "CA" suffix (e.g., SMBG188CA). Using SMBG188A-M3/52 in reverse-biased AC paths would result in forward conduction and failure during normal operation.
SMBG188A-M3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB Gull Wing
- Series:
- TransZorb®
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 188V
- Voltage - Breakdown (Min):
- 209V
- Voltage - Clamping (Max) @ Ipp:
- 328V
- Current - Peak Pulse (10/1000µs):
- 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)
SMBG188A-M3/52 FAQ
1.How can I place an order for SMBG188A-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG188A-M3/52 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 SMBG188A-M3/52 reliable?
The price and inventory of SMBG188A-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG188A-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBG188A-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG188A-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG188A-M3/52?
SMBG188A-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG188A-M3/52 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 SMBG188A-M3/52?
For technical support, including SMBG188A-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG188A-M3/52 requirements.
6.How does Aetrix verify that SMBG188A-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG188A-M3/52 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 SMBG188A-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBG188A-M3/52?
All SMBG188A-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG188A-M3/52, 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 SMBG188A-M3/52 part is unused and in its original packaging.
Return procedure for SMBG188A-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG188A-M3/52 Tags
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