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Vishay General Semiconductor - Diodes Division SMBJ188CA-E3/5B
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- Part No.:
- SMBJ188CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ188CA-E3/5B.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,345
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Product details
Overview
SMBJ188CA-E3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. 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 dissipation with 10/1000 µs waveform - deployed on signal lines, sensor interfaces, and power rails in industrial and telecom equipment.
For engineers reviewing the SMBJ188CA-E3/5B datasheet, SMBJ188CA-E3/5B pinout, SMBJ188CA-E3/5B application, or SMBJ188CA-E3/5B equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal derating curves, RoHS-compliant commercial-grade packaging, and direct alternative part comparisons - all aligned to Vishay Document #88392 (Rev. 09-Jan-2024).
Technical Context
This TVS diode operates symmetrically in both directions due to its CA suffix designation, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the 20 °C/W junction-to-lead thermal resistance supports reliable surge energy dissipation under repetitive 0.01% duty cycle conditions.
The device complies with ANSI/IEEE C62.35 for transient suppressor definitions and meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow peak. It is not AEC-Q101 qualified (E3 suffix denotes RoHS-compliant commercial grade only), and its unmarked SMB package reflects bidirectional construction with no cathode/anode identification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range. |
| VBR min/max | 209 V / 231 V at 1.0 mA test current - Confirmed bidirectional breakdown threshold with ±5% tolerance band. |
| VC @ IPPM | 328 V at 2.0 A (10/1000 µs) - Clamped voltage during worst-case surge; determines protected circuit's maximum stress level. |
| PPPM | 600 W - Peak pulse power handling capability; validates suitability for IEC 61000-4-5 Level 4 (4 kV) surge events. |
| IPPM | 2.0 A - Peak surge current supported at rated clamping voltage; derived from 600 W / 328 V calculation. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in high-ambient industrial environments with proper PCB copper area. |
| RθJL | 20 °C/W - Junction-to-lead thermal resistance; informs heatsinking requirements when mounted on 5.0 mm × 5.0 mm copper pads. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No functional distinction - either terminal accepts positive or negative transient; clamping occurs across both terminals simultaneously. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity up to 4 kV in industrial control systems. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns response), improving protection margin for downstream ICs. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage current over temperature and lifetime, critical for field-reliable designs. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard SMT reflow without baking; compatible with high-volume automated assembly. |
| RoHS-compliant E3 suffix | Meets EU Directive 2011/65/EU and China RoHS II; halogen-free option available via M3 suffix. |
Applications
| Industrial Motor Drives | Telecom Power Interfaces |
|---|---|
|
Use Scenario: Protection of gate drivers and feedback sensing circuits against inductive switching spikes in variable-frequency drives. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across MOSFET gate-source or op-amp input pins. Use Value: Limits transient excursions to ≤328 V, preventing gate oxide rupture and maintaining signal integrity during 600 W surge events. |
Use Scenario: Input-stage surge suppression on -48 V DC telecom power supplies exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input rail prior to DC/DC converter and monitoring ICs. Use Value: Absorbs 2.0 A 10/1000 µs surges without degradation, preserving upstream fuse coordination and system uptime. |
| Automotive Body Control Modules | Industrial Sensor Signal Conditioning |
|
Use Scenario: Protection of LIN bus transceivers and microcontroller I/O against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Secondary-level TVS on low-speed communication lines where AEC-Q101 is not required. Use Value: Provides cost-optimized, non-automotive-qualified clamping at 188 V standoff - suitable for non-safety-critical subassemblies. |
Use Scenario: Shielding analog front-end amplifiers and ADC inputs in pressure/temperature sensor nodes from ESD and EFT. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical) shunt protector on differential sensor outputs. Use Value: Maintains signal fidelity with <1.0 µA leakage at 188 V, avoiding DC offset errors in precision measurement paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188CA-M3/5B | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package. | Required for halogen-free BOM compliance in consumer electronics and green-certified industrial products. | Select when environmental compliance mandates halogen-free materials without altering layout or performance. |
| SMCJ188CA-E3/5B | Same VWM/VBR/VC, but in larger SMC (DO-214AB) package with 1500 W PPPM. | Used where higher surge energy (e.g., outdoor telecom cabinets) demands greater power handling than SMBJ series allows. | Choose only if PCB space permits larger footprint and system-level surge testing exceeds 600 W requirements. |
Compared with SMBJ188CA-E3/5B, the M3 variant offers identical protection performance with halogen-free construction, while the SMCJ188CA-E3/5B trades compactness for 2.5× higher pulse power - making the SMBJ version optimal for space-constrained, cost-sensitive industrial PCBs requiring certified 600 W clamping.
Availability
SMBJ188CA-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, telecom power interfaces, automotive body control modules, and industrial sensor signal conditioning requiring stable component supply and full traceability.
Supply support for SMBJ188CA-E3/5B 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 and application-specific optimization.
The SMBJ series targets surface-mount transient suppression in commercial and industrial systems, balancing high pulse power, low clamping, and automated assembly compatibility - optimized for cost-effective board-level surge resilience.
FAQ
What is the clamping voltage of SMBJ188CA-E3/5B at its rated peak pulse current?
The SMBJ188CA-E3/5B has a maximum clamping voltage (VC) of 328 V when subjected to its specified peak pulse current of 2.0 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay Document #88392, ensuring predictable overvoltage limiting for downstream components during surge events. The SMBJ188CA-E3/5B maintains this clamping performance across its full operating temperature range.
Is SMBJ188CA-E3/5B suitable for bidirectional signal line protection?
Yes, SMBJ188CA-E3/5B is explicitly designed for bidirectional protection, as indicated by the "CA" suffix in its part number. Its symmetrical breakdown characteristic (209–231 V in both directions) allows it to suppress positive and negative transients equally - ideal for AC-coupled data lines, differential sensor outputs, and ungrounded power rails. The SMBJ188CA-E3/5B requires no polarity orientation during placement.
Does SMBJ188CA-E3/5B meet AEC-Q101 qualification for automotive use?
No, SMBJ188CA-E3/5B is not AEC-Q101 qualified. Its "E3" suffix denotes RoHS-compliant commercial-grade construction only. For automotive applications requiring AEC-Q101, Vishay offers the SMBJ188CAHE3_B variant (with HE3 suffix). The SMBJ188CA-E3/5B remains appropriate for non-safety-critical automotive subsystems where qualification is not mandated, such as body electronics prototypes or aftermarket modules.
What is the thermal resistance from junction to ambient for SMBJ188CA-E3/5B?
The typical junction-to-ambient thermal resistance (RθJA) of SMBJ188CA-E3/5B is 100 °C/W when mounted on the minimum recommended pad layout (0.2" × 0.2" copper pads per terminal). This value assumes still air convection and informs derating requirements above 25 °C ambient. For sustained surge duty, the lower RθJL = 20 °C/W is more relevant when heat flows primarily into PCB copper traces. The SMBJ188CA-E3/5B must be applied within these thermal limits to avoid junction overheating.
How does the leakage current of SMBJ188CA-E3/5B compare at its 188 V stand-off voltage?
At its rated stand-off voltage (VWM) of 188 V, the SMBJ188CA-E3/5B exhibits a maximum reverse leakage current (ID) of 1.0 µA at 25 °C - verified per Vishay Document #88392. This ultra-low leakage ensures minimal power loss and avoids loading effects in high-impedance sensor or reference circuits. Leakage remains below 5 µA even at +125 °C, confirming stable performance across industrial temperature ranges. The SMBJ188CA-E3/5B achieves this while maintaining fast response and robust clamping.
SMBJ188CA-E3/5B 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ188CA-E3/5B FAQ
1.How can I place an order for SMBJ188CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ188CA-E3/5B 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 SMBJ188CA-E3/5B reliable?
The price and inventory of SMBJ188CA-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ188CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ188CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ188CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ188CA-E3/5B?
SMBJ188CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ188CA-E3/5B 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 SMBJ188CA-E3/5B?
For technical support, including SMBJ188CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ188CA-E3/5B requirements.
6.How does Aetrix verify that SMBJ188CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ188CA-E3/5B 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 SMBJ188CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ188CA-E3/5B?
All SMBJ188CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ188CA-E3/5B, 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 SMBJ188CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ188CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ188CA-E3/5B Tags
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