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Vishay General Semiconductor - Diodes Division SMBJ188CA-E3/52
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- Part No.:
- SMBJ188CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ188CA-E3/52.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:1,126
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Product details
Overview
SMBJ188CA-E3/52 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, 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, sensor interfaces, and industrial I/O circuits against ESD and inductive switching surges.
For engineers reviewing the SMBJ188CA-E3/52 datasheet, SMBJ188CA-E3/52 pinout, SMBJ188CA-E3/52 application, or SMBJ188CA-E3/52 equivalent, key selection criteria include bidirectional clamping capability, 188 V working voltage compatibility with 200 V-class DC rails, low leakage (<1.0 µA at VWM), and RoHS-compliant matte tin-plated leads suitable for automated SMT assembly in automotive-grade and industrial control designs.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping performance regardless of transient polarity. Its glass-passivated junction ensures stable VBR tolerance (±5% typical), low incremental surge resistance, and fast response time (<1.0 ns) to sub-microsecond transients induced by relay switching or lightning-induced coupling.
The device is rated for continuous operation from –55 °C to +150 °C junction temperature, with thermal resistance of 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads. It meets MSL Level 1 per J-STD-020 and supports reflow up to 260 °C peak, making it compatible with standard lead-free PCB assembly processes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 188 V - maximum continuous reverse voltage before significant leakage; matches 200 V nominal DC bus systems with 6% margin. |
| VBR (Breakdown Voltage) | 209–231 V at 1 mA - ensures reliable triggering above normal operating voltage while avoiding false clamping. |
| VC (Clamping Voltage) | 328 V at IPPM = 2.0 A - limits transient voltage seen by downstream ICs during 10/1000 µs surge events. |
| PPPM (Peak Pulse Power) | 600 W - sustains high-energy transients without failure under standardized 10/1000 µs waveform test conditions. |
| ID (Reverse Leakage) | ≤1.0 µA at VWM - minimizes standby power loss and avoids interference in high-impedance sensor bias networks. |
| TJ max. | +150 °C - enables deployment in under-hood automotive modules and industrial motor drives with elevated ambient temperatures. |
| Package | SMB (DO-214AA) - 0.205" × 0.130" footprint with gull-wing leads; optimized for pick-and-place and reflow compatibility. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Case dimensions: 5.21 mm × 3.30 mm × 2.13 mm (L × W × H); matte tin-plated terminals solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No cathode band; either terminal serves as anode or cathode depending on transient polarity - enables single-device protection of AC-coupled or floating lines. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both directions - eliminates need for dual unidirectional devices on differential or AC signal paths. |
| 600 W peak pulse power | Withstands 10/1000 µs surges up to 2.0 A without degradation - suitable for IEC 61000-4-5 Level 3 (1 kV/2 Ω) system-level testing. |
| Low leakage current | ≤1.0 µA at 188 V - preserves signal integrity in high-impedance analog front-ends and battery-backed monitoring circuits. |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60% RH - allows direct use from reel without baking, reducing manufacturing overhead. |
| RoHS-compliant & halogen-free option | E3 suffix denotes commercial-grade RoHS compliance; M3 suffix adds halogen-free molding compound - meets IPC-1752A reporting requirements. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and current-sense amplifiers against flyback voltage spikes from brushed DC motors and solenoid loads. IC Role / Device Role / Timing Role: Bidirectional TVS placed across motor winding terminals or between gate driver output and ground. Use Value: Clamps 328 V transients within nanoseconds, preventing latch-up or permanent damage to 200 V-rated MOSFETs and op-amps. |
Use Scenario: Shielding LIN bus transceivers and microcontroller I/O pins from load dump and jump-start surges in door module ECUs. IC Role / Device Role / Timing Role: Standoff-rated TVS installed at connector interface to absorb coupled energy before it reaches silicon. Use Value: 188 V VWM aligns with 14 V automotive systems derated for 24 V jump-start scenarios; 150 °C TJ max supports under-dash mounting. |
| Telecom Power Feeds | Industrial Sensor Signal Conditioning |
|
Use Scenario: Safeguarding -48 V DC telecom power input stages against lightning-induced common-mode surges on outdoor cabinet feeds. IC Role / Device Role / Timing Role: Bidirectional TVS connected line-to-line and line-to-ground in primary protection stage. Use Value: Symmetric clamping ensures equal suppression of positive and negative transients on bipolar supply rails without polarity concerns. |
Use Scenario: Protecting 4–20 mA current loop receivers and RTD amplifier inputs from ESD and field wiring faults in process automation PLCs. IC Role / Device Role / Timing Role: Low-leakage TVS placed across input terminals upstream of precision instrumentation amps. Use Value: ≤1.0 µA leakage avoids gain error in µA-level current loops; SMB footprint enables dense layout near connectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188CA-M3/52 | Halogen-free molding compound; otherwise identical electrical specs and SMB package. | Required where IPC-1752A halogen-free compliance is mandated for green procurement programs. | Select when environmental compliance outweighs minor cost premium over E3 variant. |
| SMCJ188CA-E3 | Larger SMC (DO-214AB) package; same VWM/VBR/VC but higher 1500 W PPPM rating and 5.0 A IPPM. | Suitable for higher-energy threat environments (e.g., IEC 61000-4-5 Level 4) where board space permits larger footprint. | Choose only if 600 W is insufficient and layout allows 7.11 mm × 6.22 mm SMC footprint. |
Compared with SMBJ188CA-E3/52, the M3 variant offers identical protection performance with halogen-free materials, while SMCJ188CA-E3 delivers 2.5× higher surge capacity in a larger package - neither is pin-compatible, and substitution requires layout revision and thermal validation.
Availability
SMBJ188CA-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and industrial sensor signal conditioning requiring stable component supply and full traceability.
Supply support for SMBJ188CA-E3/52 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 handling, and automotive qualification.
The SMBJ series was engineered for robust, surface-mount transient suppression in space-constrained industrial and automotive applications - balancing high surge capability, tight VBR tolerance, and automated assembly compatibility.
FAQ
What is the clamping voltage of SMBJ188CA-E3/52 at its rated peak pulse current?
The SMBJ188CA-E3/52 has a maximum clamping voltage (VC) of 328 V at a peak pulse current (IPPM) of 2.0 A, measured using the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is confirmed in Vishay's datasheet Document Number 88392, page 2. The SMBJ188CA-E3/52 maintains this clamping performance bidirectionally, ensuring consistent protection regardless of transient polarity.
Is SMBJ188CA-E3/52 suitable for automotive applications?
SMBJ188CA-E3/52 is qualified to AEC-Q101 when ordered with HE3 or HM3 suffixes; the E3/52 variant is commercial-grade and not AEC-Q101 certified. However, its –55 °C to +150 °C operating junction temperature range, MSL Level 1 rating, and 260 °C reflow compatibility make it viable for non-safety-critical automotive subsystems like infotainment power rails or HVAC sensor interfaces - provided system-level qualification is performed. Always verify SMBJ188CA-E3/52 suitability against specific OEM stress-test requirements.
How does the bidirectional design of SMBJ188CA-E3/52 affect its placement on the PCB?
The SMBJ188CA-E3/52 has no polarity marking and functions identically in both directions, so it can be placed without orientation constraints - unlike unidirectional TVS diodes that require cathode alignment. This simplifies layout, reduces assembly errors, and enables use on AC-coupled lines, differential buses (e.g., RS-485), or floating sensor outputs where voltage polarity reverses. The SMBJ188CA-E3/52's symmetrical behavior is intrinsic to its construction and verified in the "DEVICES FOR BIDIRECTION APPLICATIONS" section of the Vishay datasheet.
What is the maximum reverse leakage current for SMBJ188CA-E3/52 at its stand-off voltage?
The SMBJ188CA-E3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 188 V stand-off voltage (VWM), measured at 25 °C. This low leakage preserves signal fidelity in high-impedance circuits such as precision current-loop receivers or thermocouple amplifiers. The value is specified in the "ELECTRICAL CHARACTERISTICS" table of Vishay's SMBJ5.0A–SMBJ188A datasheet (Document Number 88392, page 2) and remains stable across the full operating temperature range due to glass-passivated junction technology.
Can SMBJ188CA-E3/52 replace a unidirectional TVS in an existing design?
SMBJ188CA-E3/52 can replace a unidirectional TVS only if the circuit topology is inherently symmetric or if the original design uses two unidirectional devices back-to-back - because SMBJ188CA-E3/52 provides identical clamping in both directions. It cannot substitute for a single unidirectional TVS on a DC rail with defined polarity without verifying that reverse conduction won't disrupt bias conditions. Review the original schematic and confirm that the SMBJ188CA-E3/52's 188 V VWM and 328 V VC meet the system's voltage margin and clamping targets before redesign.
SMBJ188CA-E3/52 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:
- -
- 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-E3/52 FAQ
1.How can I place an order for SMBJ188CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ188CA-E3/52 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 SMBJ188CA-E3/52 reliable?
The price and inventory of SMBJ188CA-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ188CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ188CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ188CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ188CA-E3/52?
SMBJ188CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ188CA-E3/52 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 SMBJ188CA-E3/52?
For technical support, including SMBJ188CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ188CA-E3/52 requirements.
6.How does Aetrix verify that SMBJ188CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ188CA-E3/52 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 SMBJ188CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ188CA-E3/52?
All SMBJ188CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ188CA-E3/52, 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 SMBJ188CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ188CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ188CA-E3/52 Tags
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