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Vishay General Semiconductor - Diodes Division SMBJ188CAHE3_B/I
- Part No.:
- SMBJ188CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ188CAHE3_B/I.pdf
- Description:
- 600W,188V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,479
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Product details
Overview
SMBJ188CAHE3_B/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the 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), 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 industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ188CAHE3_B/I datasheet, SMBJ188CAHE3_B/I pinout, SMBJ188CAHE3_B/I application, or SMBJ188CAHE3_B/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (−55 to +150 °C), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamping protector using an avalanche junction structure, responding to transient overvoltages within picoseconds. Its bidirectional symmetry enables suppression of both positive and negative polarity surges without polarity-sensitive layout constraints.
Designed per ANSI/IEEE C62.35, it delivers repeatable clamping performance under 0.01% duty cycle conditions and meets J-STD-020 MSL Level 1 (260 °C peak reflow). The glass-passivated chip junction ensures stable long-term reliability in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 209 V / 231 V at 1.0 mA - guaranteed breakdown threshold range defining surge turn-on window |
| VC @ IPPM | 328 V at 2.0 A - clamped voltage during full-rated 600 W transient, limiting downstream stress |
| PPPM | 600 W (10/1000 µs waveform) - peak surge energy handling capacity for lightning/inductive spike immunity |
| TJ max | +150 °C - maximum junction temperature enabling operation in high-ambient industrial enclosures |
| RθJA | 100 °C/W - thermal resistance from junction to ambient, guiding heatsinking requirements on 5.0 mm × 5.0 mm copper pads |
| Leakage ID | 1.0 µA max at VWM - negligible standby current draw preserving low-power system integrity |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Accepts reverse surge current during negative transients; symmetric with cathode for bidirectional operation |
| Cathode | Transient current entry (positive polarity) | Accepts forward surge current during positive transients; electrically identical to anode in bidirectional mode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV surge) on 50 Ω source impedance without degradation |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (<1 ns response time) |
| MSL Level 1 moisture sensitivity | Zero bake requirement prior to reflow; compatible with standard SMT assembly lines up to 260 °C peak |
| Glass-passivated junction | Prevents surface contamination-induced leakage drift and enhances long-term stability in humid environments |
Applications
| Industrial Sensor Interface Protection | Telecom Line Surge Suppression |
|---|---|
Use Scenario: Protecting analog input pins of PLC analog I/O modules from switching transients induced by solenoid valves and motor contactors. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed directly at connector entry point to shunt surge energy before reaching precision ADC front-end. Use Value: Limits transient voltage to ≤328 V, preventing latch-up or gate oxide damage in downstream op-amps and SAR ADCs rated for 36 V absolute maximum. | Use Scenario: Shielding RS-485 transceiver data lines in outdoor base station equipment exposed to lightning-induced ground potential rise. IC Role / Device Role / Timing Role: Bidirectional clamping element across differential pair, symmetrically suppressing ±328 V surges without polarity-dependent routing. Use Value: Maintains signal integrity by clamping within 1 ns while adding <1 pF junction capacitance at zero bias, avoiding data rate degradation at 10 Mbps. |
| Automotive Body Control Module (BCM) | AC/DC Power Supply Input Stage |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller GPIOs in door module ECUs subjected to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: AEC-Q101-qualified transient suppressor mounted at harness interface, absorbing repetitive 100 V/50 ms pulses. Use Value: Survives ≥1000 cycles of ISO 7637-2 Test Pulse 5a without parameter shift, ensuring functional safety compliance per ASIL-B requirements. | Use Scenario: Secondary-side overvoltage protection on 24 V DC input rails of industrial embedded controllers powered from switched-mode supplies. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after bulk filter capacitor to clamp residual switching spikes and ESD events entering via DIN rail connectors. Use Value: Withstands 600 W surges while maintaining 1.0 µA leakage at 188 V, eliminating standby power loss concerns in always-on systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188CAHM3_B/I | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification | No difference in circuit function or layout; selected where halogen-free material compliance is mandated | Choose when environmental compliance (IEC 61249-2-21) overrides cost or availability preference |
| SMBJ170CAHE3_B/I | Lower VWM (170 V), VBR (189–209 V), and VC (275 V); same package and 600 W rating | Better suited for 150 V nominal systems requiring tighter clamping margin; not interchangeable without voltage margin review | Select only after verifying system maximum steady-state voltage remains ≤170 V with derating |
Compared with SMBJ188CAHE3_B/I, the SMBJ188CAHM3_B/I offers identical protection performance with halogen-free construction, while SMBJ170CAHE3_B/I trades higher voltage headroom for lower clamping voltage - requiring explicit validation of system VMAX and surge margin.
Availability
SMBJ188CAHE3_B/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, automotive body control modules, and AC/DC power supply input stages requiring stable component supply with AEC-Q101 qualification and RoHS compliance.
Supply support for SMBJ188CAHE3_B/I 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-grade qualification.
The SMBJ series is engineered for robust transient suppression in harsh environments, targeting industrial automation, automotive electronics, and telecommunications infrastructure where high-energy surge immunity and long-term parametric stability are critical.
FAQ
What is the clamping voltage of SMBJ188CAHE3_B/I at its rated peak pulse current?
The SMBJ188CAHE3_B/I clamps to a maximum of 328 V when subjected to its rated peak pulse current of 2.0 A under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuits during worst-case transients. The SMBJ188CAHE3_B/I maintains this clamping performance across its full operating temperature range of −55 to +150 °C.
Is SMBJ188CAHE3_B/I suitable for automotive applications?
Yes, SMBJ188CAHE3_B/I is AEC-Q101 qualified, meaning it has passed rigorous stress tests including temperature cycling, high-temperature reverse bias, and mechanical shock - specifically validating its use in automotive body control modules, infotainment interfaces, and powertrain subsystems. The SMBJ188CAHE3_B/I carries the "HE3" suffix denoting RoHS-compliant and AEC-Q101-qualified construction per Vishay's ordering nomenclature.
How does the bidirectional configuration of SMBJ188CAHE3_B/I affect PCB layout?
The SMBJ188CAHE3_B/I has no polarity marking and functions identically in both directions, eliminating orientation constraints during automated placement. Unlike unidirectional TVS diodes, it requires no cathode band alignment - simplifying layout, reducing assembly errors, and enabling symmetric placement across differential signal pairs. This makes the SMBJ188CAHE3_B/I ideal for RS-485, CAN, and other balanced interface protection where polarity reversal must be handled without redesign.
What is the thermal resistance of SMBJ188CAHE3_B/I and how does it impact board design?
SMBJ188CAHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimal copper area; increasing pad size or adding internal thermal vias reduces effective RθJA. For continuous 5.0 W power dissipation, board layout must ensure junction temperature stays below +150 °C - requiring thermal analysis if ambient exceeds +75 °C or airflow is restricted.
Does SMBJ188CAHE3_B/I meet moisture sensitivity level (MSL) requirements for lead-free reflow?
Yes, SMBJ188CAHE3_B/I meets J-STD-020 MSL Level 1 with a maximum peak reflow temperature of 260 °C, meaning it can be processed through standard lead-free SMT reflow profiles without baking or special handling. This MSL rating applies to the SMB (DO-214AA) package with matte tin-plated leads and confirms compatibility with high-volume automated assembly lines used in industrial and automotive manufacturing.
SMBJ188CAHE3_B/I 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:
- -
- 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)
SMBJ188CAHE3_B/I FAQ
1.How can I place an order for SMBJ188CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ188CAHE3_B/I 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 SMBJ188CAHE3_B/I reliable?
The price and inventory of SMBJ188CAHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ188CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ188CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ188CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ188CAHE3_B/I?
SMBJ188CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ188CAHE3_B/I 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 SMBJ188CAHE3_B/I?
For technical support, including SMBJ188CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ188CAHE3_B/I requirements.
6.How does Aetrix verify that SMBJ188CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ188CAHE3_B/I 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 SMBJ188CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ188CAHE3_B/I?
All SMBJ188CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ188CAHE3_B/I, 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 SMBJ188CAHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ188CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ188CAHE3_B/I Tags
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