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Vishay General Semiconductor - Diodes Division SMBJ188A-M3/52
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- Part No.:
- SMBJ188A-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ188A-M3/52.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,078
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Product details
Overview
SMBJ188A-M3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed to protect sensitive electronics against high-energy transients such as inductive load switching and lightning surges. It features a 188 V stand-off voltage (VWM), 209–231 V breakdown voltage (VBR at 1 mA), 328 V maximum clamping voltage (VC) at 2.0 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines of industrial sensor interfaces and telecom infrastructure.
For engineers reviewing the SMBJ188A-M3/52 datasheet, SMBJ188A-M3/52 pinout, SMBJ188A-M3/52 application, or SMBJ188A-M3/52 equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, RoHS/halogen-free compliance status, and direct alternatives for overvoltage protection design validation.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its specified VBR range (209–231 V). Its low incremental surge resistance ensures minimal voltage overshoot during transient events, while fast response time (<1 ps) enables protection of downstream MOSFETs and ICs before damage occurs.
Thermal performance is defined by RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), supporting operation up to TJ = +150 °C. The device meets J-STD-020 MSL Level 1 and is halogen-free, RoHS-compliant per base P/N-M3 suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin below breakdown. |
| VBR (min/max) | 209 V / 231 V at IT = 1 mA - Confirmed avalanche onset range; ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 328 V at 2.0 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on protected circuitry. |
| PPPM | 600 W - Peak pulse power handling capability; validates robustness against IEC 61000-4-5 Level 4 surges. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports inrush and fault-current tolerance. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in high-ambient industrial environments without thermal shutdown. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 0.220" x 0.155" footprint; compatible with automated pick-and-place and reflow. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode-banded unidirectional configuration. Matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102. Polarity indicated by black band denoting cathode terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-voltage rail; forms return path during clamping event. |
| Cathode | High-side transient input node | Connected to protected line (e.g., 188 V supply rail); conducts avalanche current when VIN > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validates immunity to IEC 61000-4-5 surge test waveforms without degradation or failure. |
| Clamping voltage ≤328 V at 2.0 A | Ensures protected ICs or MOSFETs experience <328 V stress during worst-case transient, preserving reliability. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for industrial and telecom equipment sold in EU, China, and Japan. |
| MSL Level 1, peak reflow ≤260 °C | Enables single-pass lead-free reflow assembly without moisture-induced popcorn failure. |
| Low incremental surge resistance | Minimizes dynamic voltage rise during fast-rising transients, improving protection fidelity for high-speed circuits. |
Applications
| Industrial Power Supply Protection | Telecom Line Interface Protection |
|---|---|
Use Scenario: Protecting 180–200 V DC intermediate bus rails in programmable logic controller (PLC) power modules against inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between rail and chassis ground, absorbing energy from L·di/dt spikes. Use Value: Limits rail overvoltage to ≤328 V during 100 A/10 µs transients, preventing gate oxide rupture in downstream 200 V MOSFETs. |
Use Scenario: Safeguarding RS-485 transceiver inputs on remote base station backhaul cards exposed to lightning-induced surges on long copper runs. IC Role / Device Role / Timing Role: Primary front-end surge clamp on differential pair, coordinated with GDT and series impedance. Use Value: Clamps common-mode surges to <328 V within <1 ps, maintaining signal integrity and avoiding transceiver latch-up. |
| Automotive Body Control Module (BCM) | Renewable Energy Inverter DC Link |
Use Scenario: Protecting 12 V–24 V auxiliary supplies feeding microcontrollers in BCMs subjected to ISO 7637-2 pulse 5a/b load dump events. IC Role / Device Role / Timing Role: Secondary clamping stage after primary TVS array; handles residual energy not absorbed upstream. Use Value: Withstands 600 W pulses at +125 °C ambient, enabling AEC-Q101-compatible designs using M3-grade variant. |
Use Scenario: Guarding 188 V nominal DC link capacitors in residential solar microinverters against grid-switching transients. IC Role / Device Role / Timing Role: Parallel-connected TVS across DC bus to limit overvoltage during rapid IGBT turn-off. Use Value: Maintains clamping ratio <1.75×VWM, ensuring capacitor voltage stays within 250 V rating during 10/1000 µs surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188A-E3/52 | Same electrical specs; RoHS-compliant but contains brominated flame retardants (not halogen-free). | Acceptable for commercial-grade non-automotive designs where halogen-free requirement is waived. | Select E3 if halogen content is unrestricted and cost sensitivity outweighs green-material mandates. |
| SMBJ180A-M3/52 | Lower VWM = 180 V, VBR = 200–221 V, VC = 317 V - tighter clamping but reduced operating margin. | Better suited for 180 V systems with tighter tolerance; less headroom for supply drift or ripple. | Choose SMBJ180A-M3/52 only if system nominal voltage is strictly ≤180 V and VWM margin is confirmed ≥5 %. |
Compared with SMBJ188A-M3/52, the E3 variant trades halogen-free compliance for lower cost in non-regulated markets, while SMBJ180A-M3/52 offers lower clamping at the expense of reduced standoff margin - making SMBJ188A-M3/52 optimal for 188 V nominal rails requiring both safety margin and environmental compliance.
Availability
SMBJ188A-M3/52 is available at Aetrix Electronics and suitable for industrial power supply protection, telecom line interface hardening, automotive body control modules, and renewable energy inverter DC link applications requiring stable component supply, halogen-free compliance, and repeatable surge immunity.
Supply support for SMBJ188A-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, TVS devices, and optoelectronics with emphasis on reliability, power efficiency, and application-specific performance.
The SMBJ series was engineered for high-energy transient suppression in harsh environments - targeting industrial automation, telecom infrastructure, and automotive subsystems where consistent clamping and long-term stability are critical.
FAQ
What is the maximum clamping voltage of SMBJ188A-M3/52 under standard test conditions?
The SMBJ188A-M3/52 has a maximum clamping voltage (VC) of 328 V when subjected to its rated peak pulse current of 2.0 A with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and reflects worst-case voltage seen by protected circuitry during surge events - a key parameter for validating downstream component voltage ratings against IEC 61000-4-5 compliance.
Is SMBJ188A-M3/52 halogen-free and RoHS-compliant?
Yes, SMBJ188A-M3/52 is halogen-free and RoHS-compliant, as confirmed by Vishay's M3 base part numbering convention. The "M3" suffix explicitly denotes halogen-free molding compound and matte tin-plated leads meeting JESD 201 Class 2 whisker resistance - required for environmentally regulated industrial and telecom equipment shipped to EU, China, and Japan.
Can SMBJ188A-M3/52 be used in automotive applications?
SMBJ188A-M3/52 itself is commercial-grade; however, the AEC-Q101 qualified version is designated SMBJ188AHM3_X (e.g., SMBJ188AHM3A). While SMBJ188A-M3/52 shares identical electrical characteristics, it lacks the extended temperature cycling, humidity testing, and failure analysis required for automotive qualification - so it must not be used in safety-critical vehicle systems without formal AEC-Q101 validation.
What is the thermal resistance from junction to ambient for SMBJ188A-M3/52?
The typical thermal resistance from junction to ambient (RθJA) for SMBJ188A-M3/52 is 100 °C/W when mounted on the minimum recommended 0.2" × 0.2" copper pads per terminal. This value assumes no additional heatsinking and governs allowable power dissipation at elevated ambient temperatures - for example, derating begins above 25 °C per Figure 2 in the Vishay datasheet 88392.
How does SMBJ188A-M3/52 differ from bidirectional variants like SMBJ188CA?
SMBJ188A-M3/52 is unidirectional with cathode marking and conducts only in reverse avalanche mode, whereas SMBJ188CA is bidirectional with symmetrical clamping in both polarities and no polarity marking. The unidirectional version provides lower leakage at VWM (1.0 µA vs. 2.0 µA for CA types ≤10 V, doubled for higher VWM), making SMBJ188A-M3/52 preferable for DC rail protection where reverse conduction must be blocked.
SMBJ188A-M3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- 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 (SMBJ)
SMBJ188A-M3/52 FAQ
1.How can I place an order for SMBJ188A-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ188A-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 SMBJ188A-M3/52 reliable?
The price and inventory of SMBJ188A-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 SMBJ188A-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ188A-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ188A-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ188A-M3/52?
SMBJ188A-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ188A-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 SMBJ188A-M3/52?
For technical support, including SMBJ188A-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ188A-M3/52 requirements.
6.How does Aetrix verify that SMBJ188A-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ188A-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 SMBJ188A-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ188A-M3/52?
All SMBJ188A-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ188A-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 SMBJ188A-M3/52 part is unused and in its original packaging.
Return procedure for SMBJ188A-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ188A-M3/52 Tags
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