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Vishay General Semiconductor - Diodes Division SMBJ188CAHE3/52
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- Part No.:
- SMBJ188CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ188CAHE3/52.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,167
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Product details
Overview
SMBJ188CAHE3/52 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 capability with a 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies and telecom infrastructure.
For engineers reviewing the SMBJ188CAHE3/52 datasheet, SMBJ188CAHE3/52 pinout, SMBJ188CAHE3/52 application, or SMBJ188CAHE3/52 equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 to +150 °C), and compliance with UL 497B for surge protector classification.
Technical Context
This device operates as a voltage-clamped crowbar during transient overvoltage events, leveraging an avalanche breakdown mechanism to divert surge energy away from protected circuitry. Its bidirectional symmetry enables use on AC-coupled or floating lines without polarity concerns, and its glass-passivated junction ensures stable leakage performance and long-term reliability under repetitive surges.
The SMBJ188CAHE3/52 is rated for 600 W peak pulse power (10/1000 µs), supports 2.0 A IPPM at VC = 328 V, and exhibits low incremental surge resistance - critical for minimizing voltage overshoot during fast-rising transients such as EFT or lightning-induced surges. It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive-grade robustness.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 170–188 V DC bus protection. |
| VBR (min/max) | 209 V / 231 V at IT = 1 mA - guaranteed breakdown window ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 328 V at IPPM = 2.0 A - clamping voltage limits downstream stress; enables design margin against 300 V-rated components. |
| PPPM | 600 W (10/1000 µs) - standardized surge handling capacity; validates suitability for IEC 61000-4-5 Level 3/4 surge immunity testing. |
| ID @ VWM | 1.0 µA max - ultra-low leakage preserves efficiency in high-impedance sensing or battery-backed circuits. |
| TJ max. | +150 °C - supports operation in under-hood automotive or enclosed industrial enclosures without derating. |
| RθJA | 100 °C/W - thermal resistance measured on 0.2" × 0.2" copper pads; informs heatsinking requirements for sustained surge duty cycles. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified (HE3 suffix). Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Accepts surge current from either direction; connects to line under protection (e.g., DC bus or AC signal path). |
| Cathode | Transient current exit (bidirectional) | Completes surge path to ground or return rail; symmetric with anode - no functional distinction in CA devices. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validates compliance with IEC 61000-4-5 surge immunity up to 4 kV (line-earth) in properly designed layouts. |
| AEC-Q101 qualified (HE3 suffix) | Confirms reliability for automotive powertrain and body electronics where extended temperature cycling and vibration endurance are required. |
| UL 497B recognized (QVGQ2) | Enables use in certified telecom and industrial equipment requiring third-party safety validation for surge protection circuits. |
| MSL Level 1, LF peak 260 °C | Supports standard lead-free reflow without moisture sensitivity concerns - eliminates bake-out requirement pre-assembly. |
| Low ID (1.0 µA max @ VWM) | Minimizes standby power loss in always-on systems such as IoT gateways or remote sensors with limited energy budgets. |
Applications
| Industrial Power Supply Protection | Telecom Line Interface |
|---|---|
|
Use Scenario: Protecting 180–200 V DC output rails in switch-mode power supplies against load-dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across output capacitor terminals to limit overvoltage spikes during fault conditions. Use Value: Prevents damage to downstream DC-DC converters and microcontrollers by limiting transient excursions to ≤328 V. |
Use Scenario: Shielding RS-485 or Ethernet PHY interface lines from lightning-induced surges in outdoor base stations and DSLAM cabinets. IC Role / Device Role / Timing Role: Primary-level TVS placed differential-mode between signal pair and common-mode to ground, absorbing common- and differential-mode transients. Use Value: Maintains signal integrity during 4 kV IEC 61000-4-5 surges while preserving <1 pF junction capacitance impact on 10 Mbps data rates. |
| Automotive Body Control Module | Consumer Appliance Motor Drive |
|
Use Scenario: Safeguarding LIN bus transceivers and power window motor drivers in BCMs exposed to ISO 7637-2 pulse 1/2a/5a transients. IC Role / Device Role / Timing Role: Secondary-level TVS on 12 V supply rail and LIN signal line, working in coordination with upstream fuses and filters. Use Value: AEC-Q101 qualification ensures survival through 1000+ thermal cycles and vibration profiles per automotive OEM requirements. |
Use Scenario: Clamping back-EMF spikes from universal motor commutation in washing machines and HVAC blowers operating from 170–250 VAC mains. IC Role / Device Role / Timing Role: Bidirectional suppressor across motor terminals or rectified DC link, triggered by rapid dV/dt during brush arcing. Use Value: Limits voltage overshoot to <330 V, preventing breakdown of 400 V-rated bridge rectifiers and gate drivers. |
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-M3/52 | Halogen-free, RoHS-compliant, commercial grade (no AEC-Q101 qualification); identical electrical specs and package. | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and halogen-free compliance is prioritized. |
| SMCJ188CAHE3/52 | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; higher RθJA (60 °C/W) and 1500 W PPPM rating. | Better thermal performance and surge margin; requires larger PCB footprint and different pad layout. | Choose when system-level surge tests exceed 600 W or ambient temperatures exceed 100 °C with limited airflow. |
Compared with SMBJ188CAHE3/52, the M3 variant trades automotive qualification for halogen-free compliance, while the SMCJ188CAHE3/52 offers higher surge capacity at the cost of board space - enabling trade-offs between qualification scope, environmental compliance, and thermal headroom.
Availability
SMBJ188CAHE3/52 is available at Aetrix Electronics and suitable for industrial power supply protection, telecom line interface hardening, automotive body control modules, and consumer appliance motor drive circuits requiring stable component supply and AEC-Q101 traceability.
Supply support for SMBJ188CAHE3/52 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, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMBJ series targets compact, high-reliability transient suppression in space-constrained applications - engineered for fast response, low clamping, and robust surge handling in automotive, industrial, and telecom environments.
FAQ
What is the clamping voltage of SMBJ188CAHE3/52 at its rated peak pulse current?
The SMBJ188CAHE3/52 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 the Vishay datasheet Document Number 88392, page 2. The SMBJ188CAHE3/52 maintains this clamping performance across its full operating temperature range (–55 to +150 °C).
Is SMBJ188CAHE3/52 suitable for automotive applications?
Yes, SMBJ188CAHE3/52 is AEC-Q101 qualified, as indicated by the "HE3" suffix, making it suitable for automotive applications including body control modules, infotainment power rails, and LIN/CAN interface protection. It meets requirements for temperature cycling, mechanical shock, and humidity exposure defined in AEC-Q101. The SMBJ188CAHE3/52 is explicitly listed in Vishay's AEC-Q101 qualified product table in revision 09-Jan-2024 of document 88392.
How does the bidirectional configuration of SMBJ188CAHE3/52 affect its circuit placement?
The SMBJ188CAHE3/52 has no polarity marking and functions identically in both directions, allowing placement across AC-coupled lines, floating differential pairs, or ungrounded power rails without orientation constraints. Unlike unidirectional variants (e.g., SMBJ188A), the SMBJ188CAHE3/52 avoids reverse-bias failure risk on bipolar signals - simplifying layout and eliminating cathode/anode routing checks. Its symmetric VI curve is validated per ANSI/IEEE C62.35 standards.
What is the maximum reverse leakage current for SMBJ188CAHE3/52 at its stand-off voltage?
The SMBJ188CAHE3/52 specifies a maximum reverse leakage current (ID) of 1.0 µA at its 188 V stand-off voltage (VWM), tested at TA = 25 °C. This ultra-low leakage minimizes standby power loss and prevents false triggering in high-impedance monitoring circuits. The value is guaranteed across production lots and remains stable up to TJ = 125 °C, per the electrical characteristics table on page 2 of Vishay document 88392.
Does SMBJ188CAHE3/52 meet any safety certifications for surge protection?
Yes, SMBJ188CAHE3/52 carries Underwriters Laboratories (UL) recognition under file number E136766 for both unidirectional and bidirectional configurations, compliant with UL 497B for primary protector classification. This certification validates its use in safety-critical surge protection circuits in telecom, industrial, and building automation equipment. The UL mark applies specifically to the HE3 variant and is documented in the Vishay datasheet revision 09-Jan-2024.
SMBJ188CAHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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)
SMBJ188CAHE3/52 FAQ
1.How can I place an order for SMBJ188CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ188CAHE3/52 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 SMBJ188CAHE3/52 reliable?
The price and inventory of SMBJ188CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ188CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ188CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ188CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ188CAHE3/52?
SMBJ188CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ188CAHE3/52 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 SMBJ188CAHE3/52?
For technical support, including SMBJ188CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ188CAHE3/52 requirements.
6.How does Aetrix verify that SMBJ188CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ188CAHE3/52 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 SMBJ188CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ188CAHE3/52?
All SMBJ188CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ188CAHE3/52, 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 SMBJ188CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ188CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ188CAHE3/52 Tags
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