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Vishay General Semiconductor - Diodes Division SMBJ188CAHM3_A/H
- Part No.:
- SMBJ188CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ188CAHM3_A/H.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,319
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Product details
Overview
SMBJ188CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 188 V stand-off voltage (VWM), 209–231 V breakdown voltage (VBR), 328 V maximum clamping voltage (VC) at 2.0 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies and telecom infrastructure.
For engineers reviewing the SMBJ188CAHM3_A/H datasheet, SMBJ188CAHM3_A/H pinout, SMBJ188CAHM3_A/H application, or SMBJ188CAHM3_A/H equivalent, this page delivers verified electrical specs, thermal behavior, clamping performance under surge conditions, and AEC-Q101-qualified halogen-free packaging details critical for automotive-grade ESD/surge protection design-in.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (209–231 V), ID ≤ 1.0 µA at VWM = 188 V, and TC of VBR = 0.108 %/°C. Its low incremental surge resistance enables fast clamping response (<1 ns) during transient events such as inductive switching or lightning-induced surges.
The device is rated for TJ = –55 °C to +150 °C, has RθJA = 100 °C/W and RθJL = 20 °C/W, and meets MSL Level 1 per J-STD-020 with LF peak of 260 °C - confirming suitability for lead-free reflow without popcorn failure risk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 209 V / 231 V at IT = 1 mA - guaranteed breakdown threshold range for bidirectional conduction |
| VC @ IPPM | 328 V at 2.0 A - clamped voltage during 10/1000 µs surge, defining worst-case overvoltage seen by protected circuit |
| PPPM | 600 W - peak transient power handling capability under standard 10/1000 µs waveform |
| ID @ VWM | ≤ 1.0 µA - leakage current level ensuring minimal standby power loss and signal integrity |
| TJ max. | +150 °C - maximum junction temperature enabling operation in high-ambient industrial environments |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 compliant. Bidirectional configuration has no polarity marking; terminals are symmetrical anode/cathode pairs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (1 & 2) | Bidirectional transient path | Both terminals function identically - surge current flows either direction when |V| > VBR |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without derating in compact layout |
| AEC-Q101 qualified & halogen-free (HM3 suffix) | Validated for automotive powertrain and body electronics requiring zero-halogen compliance and long-term reliability |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes overvoltage stress on downstream components compared to higher-ratio TVS devices |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free assembly without moisture sensitivity concerns or pre-bake requirements |
| 1.0 µA max reverse leakage at 188 V | Preserves battery life and signal fidelity in always-on sensor and telemetry circuits |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus Lines |
|---|---|
Use Scenario: Protecting AC/DC converter front-end against load dump and inductive kickback in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across DC bus input to limit transients to <328 V during 600 W surge events. Use Value: Prevents damage to upstream rectifiers and downstream PWM controllers by limiting overvoltage within safe SOA limits. |
Use Scenario: Safeguarding differential CANH/CANL signals in BCM modules exposed to ISO 7637-2 pulse 5a (load dump). IC Role / Device Role / Timing Role: Symmetric TVS connected between CANH-CANL and ground to suppress common-mode and differential transients. Use Value: Maintains CAN signal integrity below ISO 11898-2 thresholds while surviving 100 V/50 ms pulses without degradation. |
| Telecom Base Station DC Feeds | Smart Meter Power Input Stage |
Use Scenario: Shielding -48 V DC distribution rails in outdoor telecom cabinets from lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device mounted at entry point, shunting >95% of 10/1000 µs energy before reaching DC/DC converters. Use Value: Achieves IEC 61000-4-5 compliance up to 4 kV with single-device solution, reducing BOM count and PCB area. |
Use Scenario: Securing 220 VAC-derived DC supply in residential smart meters against meter box switching transients. IC Role / Device Role / Timing Role: Secondary-level TVS after MOV, providing precise 328 V clamping to protect metrology ICs and RTC circuitry. Use Value: Extends product lifetime by preventing cumulative degradation of precision analog front-ends during repeated surge exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188CAHE3_A/H | RoHS-compliant but not halogen-free; same VWM/VBR/VC/PPPM specs; non-AEC-Q101 | Preferred for commercial-grade industrial equipment where halogen content is unrestricted | Select when cost optimization is prioritized over automotive qualification or green material mandates |
| SMD5.0-188CA | Same VWM/VBR range but lower PPPM (400 W); larger SMC (DO-214AB) package; higher RθJA (125 °C/W) | Suitable only for lower-energy surge environments or where board space allows larger footprint | Choose only if legacy layout uses SMC pads and 400 W rating suffices per system-level testing |
Compared with SMBJ188CAHE3_A/H, the HM3 version adds halogen-free construction and AEC-Q101 validation - essential for automotive Tier 1 suppliers - while SMD5.0-188CA trades power handling and thermal efficiency for mechanical compatibility with older designs.
Availability
SMBJ188CAHM3_A/H is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, telecom infrastructure, and smart metering systems requiring stable component supply with full traceability and lifecycle management.
Supply support for SMBJ188CAHM3_A/H 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, and protection devices with emphasis on reliability, thermal performance, and application-specific qualification.
The SMBJ series targets high-energy transient suppression in space-constrained applications, with design focus on automotive-grade robustness, low clamping ratios, and seamless integration into automated SMT lines.
FAQ
What is the maximum clamping voltage of SMBJ188CAHM3_A/H under surge conditions?
The SMBJ188CAHM3_A/H exhibits a maximum clamping voltage (VC) of 328 V when subjected to its rated peak pulse current of 2.0 A using the standard 10/1000 µs waveform. This value is measured per Figure 1 in Vishay Document 88392 and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream components remain within their absolute maximum ratings.
Is SMBJ188CAHM3_A/H suitable for automotive applications?
Yes, SMBJ188CAHM3_A/H is AEC-Q101 qualified and manufactured with halogen-free materials (HM3 suffix), making it suitable for automotive body electronics, infotainment power rails, and CAN/LIN bus protection. Its guaranteed operation from –55 °C to +150 °C junction temperature and MSL Level 1 reflow compatibility further validate its use in production automotive modules.
How does the bidirectional configuration of SMBJ188CAHM3_A/H affect circuit placement?
The SMBJ188CAHM3_A/H has no polarity marking and functions identically in both directions, allowing direct placement across any two nodes subject to bidirectional transients - such as differential signal pairs (CANH/CANL) or AC-coupled lines. Unlike unidirectional TVS diodes, it eliminates orientation errors during automated placement and simplifies layout for symmetric surge paths.
What is the thermal resistance profile of SMBJ188CAHM3_A/H?
SMBJ188CAHM3_A/H 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" copper pads. These values inform heatsinking decisions and derating curves - for example, at TA = 85 °C, the device must be operated below ~3.2 W continuous dissipation to maintain TJ ≤ 150 °C.
Does SMBJ188CAHM3_A/H meet RoHS and REACH requirements?
Yes, SMBJ188CAHM3_A/H is RoHS-compliant and halogen-free per Vishay's material categorization (www.vishay.com/doc?99912). The "HM3" suffix explicitly denotes halogen-free, RoHS-compliant, commercial-grade construction - verified through certified material declarations and third-party lab testing aligned with EU Directive 2011/65/EU and Regulation (EC) No. 1907/2006.
SMBJ188CAHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ188CAHM3_A/H FAQ
1.How can I place an order for SMBJ188CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ188CAHM3_A/H 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 SMBJ188CAHM3_A/H reliable?
The price and inventory of SMBJ188CAHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ188CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ188CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ188CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ188CAHM3_A/H?
SMBJ188CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ188CAHM3_A/H 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 SMBJ188CAHM3_A/H?
For technical support, including SMBJ188CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ188CAHM3_A/H requirements.
6.How does Aetrix verify that SMBJ188CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ188CAHM3_A/H 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 SMBJ188CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ188CAHM3_A/H?
All SMBJ188CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ188CAHM3_A/H, 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 SMBJ188CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMBJ188CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ188CAHM3_A/H Tags
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