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Vishay General Semiconductor - Diodes Division SMBJ188CAHM3_B/H
- Part No.:
- SMBJ188CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ188CAHM3_B/H.pdf
- Description:
- 600W,188V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,038
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Product details
Overview
SMBJ188CAHM3_B/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) at 1 mA, 600 W peak pulse power (10/1000 µs), 2.0 A maximum clamping current (IPPM), and 328 V maximum clamping voltage (VC) - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ188CAHM3_B/H datasheet, SMBJ188CAHM3_B/H pinout, SMBJ188CAHM3_B/H application, or SMBJ188CAHM3_B/H equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal derating curves, JEDEC-compliant SMB package dimensions, and AEC-Q101-qualified alternatives for automotive-grade surge protection design.
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 VC = 328 V at IPPM = 2.0 A. Its low incremental surge resistance and <1 ps response time enable effective suppression of ESD, lightning-induced surges, and inductive switching transients.
The device uses glass-passivated junction technology, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and is halogen-free and RoHS-compliant (HM3 suffix). Thermal resistance is RθJA = 100 °C/W and RθJL = 20 °C/W, supporting operation from –55 °C to +150 °C junction temperature.
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 range defining turn-on threshold |
| VC @ IPPM | 328 V at IPPM = 2.0 A - clamped voltage during 10/1000 µs surge, limiting downstream stress |
| PPPM | 600 W - peak transient power handling capability under standardized waveform |
| ID @ VWM | ≤ 1.0 µA - ultra-low leakage ensuring minimal standby power loss and signal integrity |
| TJ max. | +150 °C - maximum junction temperature enabling use in high-ambient industrial environments |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 5.59 mm × 4.06 mm footprint |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are symmetrical; device functions identically in either orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Transient current entry (negative polarity) | Accepts reverse surge current during negative half-cycle; connects to protected line |
| Cathode (Lead 2) | Transient current entry (positive polarity) | Accepts reverse surge current during positive half-cycle; connects to protected line |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal/power lines without polarity concern |
| 600 W peak pulse power (10/1000 µs) | Withstands high-energy transients common in industrial motor drives and telecom line surges |
| Halogen-free, RoHS-compliant (HM3) | Meets environmental compliance requirements for global industrial and automotive production |
| AEC-Q101 qualified option available | Supports automotive subsystems requiring validated reliability for 12 V/24 V battery rail protection |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without baking, reducing manufacturing complexity and cost |
Applications
| Industrial Sensor Interface | Telecom Line Protection |
|---|---|
|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loops) in factory automation sensors exposed to relay coil kickback and EMI. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed between signal line and ground, responding within picoseconds to overvoltage events. Use Value: Limits induced transients to ≤328 V, preserving ADC input stage integrity and preventing system resets caused by >200 V spikes. |
Use Scenario: Shielding RS-485/RS-422 differential data lines in base station backhaul equipment against lightning-induced surges. IC Role / Device Role / Timing Role: Symmetric transient suppressor mounted across differential pair, absorbing common-mode energy without distorting signal timing. Use Value: Maintains signal fidelity up to 10 Mbps by clamping surges while adding <0.5 pF junction capacitance at zero bias. |
| Automotive Body Control Module | AC/DC Power Supply Input Stage |
|
Use Scenario: Safeguarding LIN bus transceivers and microcontroller I/O pins in door module ECUs subjected to load dump and jump-start transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V supply rail and LIN signal line, rated for AEC-Q101 qualification when ordered as HM3_X variant. Use Value: Withstands 100 A IFSM (unidirectional) and 2.0 A IPPM surges while maintaining VWM = 188 V to avoid false triggering during normal battery fluctuations. |
Use Scenario: Secondary-level surge suppression on secondary-side DC bus (e.g., 170–200 VDC) of offline SMPS used in LED drivers and industrial power supplies. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after bulk capacitor to absorb residual switching transients and external line surges. Use Value: Provides precise 188 V clamping ceiling, preventing overvoltage failure of downstream MOSFETs or optocouplers rated for 200 V maximum. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188CAHE3_B/H | RoHS-compliant but not halogen-free; same electrical specs and SMB package | Lacks halogen-free certification required for certain EU industrial and automotive programs | Select when halogen-free content is not mandated and cost optimization is prioritized |
| SMBJ188CAHM3_B/I | Identical electrical and mechanical specs; differs only in tape-and-reel packaging (3200 pcs vs. 750 pcs per reel) | No functional difference; suited for high-volume SMT lines requiring larger reels | Select for automated assembly with 13" diameter reels and reduced changeover frequency |
Compared with SMBJ188CAHM3_B/H, the HE3 variant trades halogen-free compliance for lower unit cost, while the HM3_B/I variant maintains full spec equivalence but optimizes for high-volume placement logistics - neither offers pin-to-pin or performance upgrades, only compliance or packaging distinctions.
Availability
SMBJ188CAHM3_B/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, and automotive body control modules requiring stable component supply with halogen-free and RoHS-compliant assurance.
Supply support for SMBJ188CAHM3_B/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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive qualification.
The SMBJ series targets robust transient suppression in harsh environments, engineered for high pulse power density, low clamping ratio, and seamless integration into automated SMT processes across industrial and transportation markets.
FAQ
What is the clamping voltage of SMBJ188CAHM3_B/H at its rated peak pulse current?
The SMBJ188CAHM3_B/H has a maximum clamping voltage (VC) of 328 V when subjected to its rated peak pulse current (IPPM) of 2.0 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see no more than 328 V during surge events, making SMBJ188CAHM3_B/H suitable for protecting 200 V-rated circuits.
Is SMBJ188CAHM3_B/H unidirectional or bidirectional, and how does that affect circuit layout?
SMBJ188CAHM3_B/H is a bidirectional TVS diode, meaning it clamps voltage transients equally in both polarities without polarity marking on the SMB package. This eliminates orientation concerns during placement and allows single-device protection of AC-coupled, floating, or differential lines - unlike unidirectional variants such as SMBJ188A, which require correct cathode alignment.
Does SMBJ188CAHM3_B/H meet automotive qualification standards?
The SMBJ188CAHM3_B/H itself is halogen-free and RoHS-compliant but not AEC-Q101 qualified. However, Vishay offers the functionally identical SMBJ188CAHM3_B/H variant with "_X" revision suffix (e.g., SMBJ188CAHM3_B/HX) that carries full AEC-Q101 qualification - confirmed in the ordering information table of Document 88392, Revision 09-Jan-2024.
What is the thermal resistance and maximum operating temperature of SMBJ188CAHM3_B/H?
SMBJ188CAHM3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W. Its maximum operating junction temperature is +150 °C, and it is rated for storage and operation from –55 °C to +150 °C - enabling reliable use in enclosed industrial enclosures and under-hood automotive locations with proper board thermal design.
How does the HM3 suffix in SMBJ188CAHM3_B/H differ from E3 or HE3 suffixes?
The HM3 suffix in SMBJ188CAHM3_B/H denotes halogen-free, RoHS-compliant construction, whereas E3 indicates RoHS-compliant only, and HE3 adds AEC-Q101 qualification. All share identical electrical specs and SMB package dimensions, but HM3 satisfies stricter environmental mandates (e.g., IEC 61249-2-21), making SMBJ188CAHM3_B/H appropriate for green electronics programs where brominated flame retardants are prohibited.
SMBJ188CAHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- 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_B/H FAQ
1.How can I place an order for SMBJ188CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ188CAHM3_B/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_B/H reliable?
The price and inventory of SMBJ188CAHM3_B/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_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ188CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ188CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ188CAHM3_B/H?
SMBJ188CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ188CAHM3_B/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_B/H?
For technical support, including SMBJ188CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ188CAHM3_B/H requirements.
6.How does Aetrix verify that SMBJ188CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ188CAHM3_B/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_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ188CAHM3_B/H?
All SMBJ188CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ188CAHM3_B/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_B/H part is unused and in its original packaging.
Return procedure for SMBJ188CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ188CAHM3_B/H Tags
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