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Vishay General Semiconductor - Diodes Division SMBJ188CAHE3/5B
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- Part No.:
- SMBJ188CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ188CAHE3/5B.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,748
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Product details
Overview
SMBJ188CAHE3/5B 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) 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, ICs, and sensor interfaces in industrial power supplies and telecom line cards.
For engineers reviewing the SMBJ188CAHE3/5B datasheet, SMBJ188CAHE3/5B pinout, SMBJ188CAHE3/5B application, or SMBJ188CAHE3/5B equivalent, this device is selected for high-voltage DC bus protection where bidirectional surge immunity, AEC-Q101 qualification, and low thermal resistance (RθJL = 20 °C/W) are critical design requirements.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping behavior regardless of transient polarity. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), enabling effective suppression of ESD, lightning-induced surges, and inductive switching spikes.
The device is rated for TJ = –55 °C to +150 °C operation and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its AEC-Q101 qualification (denoted by HE3 suffix) confirms suitability for automotive power electronics requiring robust transient immunity without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - Maximum continuous reverse operating voltage before clamping initiates; sets upper limit for protected circuit DC bias. |
| VBR (min/max) | 209 V / 231 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on above normal operating voltage. |
| VC @ IPPM | 328 V at 2.0 A - Clamped voltage during 10/1000 µs surge; defines worst-case overvoltage seen by downstream components. |
| PPPM | 600 W - Peak pulse power handling capability; determines survivability against standardized lightning/surge waveforms. |
| ID @ VWM | ≤1.0 µA - Reverse leakage current at stand-off voltage; ensures minimal standby power loss and signal integrity. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in high-ambient environments like engine control units. |
| RθJL | 20 °C/W - Junction-to-lead thermal resistance; enables efficient heat transfer to PCB copper pads without heatsink. |
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 compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Accepts reverse surge current during negative transients; symmetrical 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 |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating lines without polarity concerns - e.g., RS-485 buses or transformer-isolated power rails. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - required for under-hood power modules. |
| 600 W 10/1000 µs rating | Withstands IEC 61000-4-5 Level 4 (4 kV) surge events on 2 Ω source impedance when properly mounted on 5.0 mm × 5.0 mm copper pads. |
| Low clamping ratio (VC/VBR ≈ 1.57) | Minimizes overvoltage stress on protected ICs - critical for 200 V-rated MOSFETs where margin below breakdown is tight. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; simplifies SMT assembly for high-volume industrial manufacturing. |
Applications
| Industrial Power Supply Protection | Telecom Line Card Surge Suppression |
|---|---|
|
Use Scenario: Protecting 200 V DC output rails in DIN-rail power supplies against load dump and capacitor discharge transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across output terminals to limit surge energy delivered to downstream regulators and microcontrollers. Use Value: Prevents latch-up or gate oxide rupture in 200 V SiC MOSFETs by limiting transient overshoot to ≤328 V with <1 ns response. |
Use Scenario: Shielding Ethernet PHY interface power pins (e.g., 12 V bias supply) from induced surges on adjacent twisted-pair cables. IC Role / Device Role / Timing Role: Secondary-level TVS deployed after primary gas discharge tube (GDT) to handle residual fast-rising transients. Use Value: Reduces clamping voltage from >600 V (GDT alone) to 328 V, ensuring compliance with IEC 61000-4-5 with <100 ps delay. |
| Automotive Body Control Module (BCM) | Renewable Energy Inverter DC Link |
|
Use Scenario: Safeguarding 12 V/24 V CAN transceiver power inputs in BCMs exposed to ISO 7637-2 pulse 5a/b load dump events. IC Role / Device Role / Timing Role: AEC-Q101-qualified bidirectional suppressor directly mounted at connector entry point. Use Value: Survives 35 V/100 ms load dump pulses while maintaining <1 µA leakage at 24 V nominal - preserving sleep-mode current budget. |
Use Scenario: Protecting IGBT gate drivers on 400–800 V DC link stages in solar inverters from switching-induced voltage spikes. IC Role / Device Role / Timing Role: High-VWM TVS placed across driver supply rails to clamp ringing above 188 V without false triggering. Use Value: Enables use of lower-cost 250 V-rated gate drivers instead of 350 V parts, reducing BOM cost while meeting UL 1741 surge immunity. |
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; identical electrical specs and AEC-Q101 qualification. | No functional difference; selected when halogen-free compliance is mandated by OEM environmental policy. | Choose SMBJ188CA-M3/5B if material declaration requires halogen-free status per IEC 61249-2-21. |
| SMCJ188CAHE3/5B | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; 1500 W PPPM rating vs. 600 W. | Higher power handling supports longer surge durations (e.g., IEC 61000-4-4 burst) but requires 30% more PCB area. | Choose SMCJ188CAHE3/5B only when system-level testing shows 600 W insufficient for required surge margin. |
Compared with SMBJ188CAHE3/5B, the M3 variant offers identical protection performance with halogen-free construction, while the SMCJ188CAHE3/5B trades compactness for higher pulse power - making the SMBJ version optimal for space-constrained 200 V rail protection where 600 W meets IEC 61000-4-5 requirements.
Availability
SMBJ188CAHE3/5B is available at Aetrix Electronics and suitable for industrial power supplies, telecom line cards, automotive body control modules, and renewable energy inverters requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ188CAHE3/5B 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure modes must be mitigated without compromising size or thermal performance.
FAQ
What does the "CA" suffix indicate in SMBJ188CAHE3/5B?
The "CA" suffix denotes a bidirectional configuration, meaning SMBJ188CAHE3/5B provides symmetrical clamping for both positive and negative voltage transients. Unlike unidirectional variants (e.g., SMBJ188A), it has no polarity marking and functions identically in either direction - essential for protecting AC-coupled or floating signal paths where transient polarity is unpredictable.
Is SMBJ188CAHE3/5B suitable for automotive applications?
Yes, SMBJ188CAHE3/5B is AEC-Q101 qualified (confirmed by the "HE3" suffix), having passed stress tests including temperature cycling, high-temperature reverse bias, and mechanical shock. It is approved for use in automotive body control modules, infotainment power supplies, and ADAS sensor interfaces where transient immunity and long-term reliability are mandatory.
How does the 328 V clamping voltage (VC) relate to system-level surge protection?
The 328 V VC value for SMBJ188CAHE3/5B is measured at 2.0 A IPPM using a 10/1000 µs waveform - representing worst-case overvoltage imposed on protected components during standardized surge events. When combined with upstream filtering or GDTs, this clamping level ensures downstream 400 V-rated capacitors and 350 V MOSFETs remain within safe operating limits per IEC 61000-4-5.
What is the significance of the "5B" packaging code in SMBJ188CAHE3/5B?
The "5B" code indicates SMBJ188CAHE3/5B is supplied in 13-inch diameter plastic tape and reel format, with a base quantity of 3200 units per reel. This packaging supports high-speed automated placement in SMT lines and aligns with IPC-7351 standards for DO-214AA footprints, ensuring consistent pick-and-place yield and reduced feeder changeover time.
Can SMBJ188CAHE3/5B replace SMBJ180CAHE3/5B in an existing design?
SMBJ188CAHE3/5B is not a direct replacement for SMBJ180CAHE3/5B due to its higher VWM (188 V vs. 180 V) and correspondingly higher VBR (209–231 V vs. 200–221 V). Substitution may cause premature clamping in circuits operating near 180 V, risking unnecessary stress or false triggering - validation of operating margin and surge test results is required before interchange.
SMBJ188CAHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ188CAHE3/5B FAQ
1.How can I place an order for SMBJ188CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ188CAHE3/5B 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 SMBJ188CAHE3/5B reliable?
The price and inventory of SMBJ188CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ188CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ188CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ188CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ188CAHE3/5B?
SMBJ188CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ188CAHE3/5B 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 SMBJ188CAHE3/5B?
For technical support, including SMBJ188CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ188CAHE3/5B requirements.
6.How does Aetrix verify that SMBJ188CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ188CAHE3/5B 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 SMBJ188CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ188CAHE3/5B?
All SMBJ188CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ188CAHE3/5B, 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 SMBJ188CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ188CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ188CAHE3/5B Tags
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