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Vishay General Semiconductor - Diodes Division SMBJ188CAHE3_A/H
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- Part No.:
- SMBJ188CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ188CAHE3_A/H.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,934
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Product details
Overview
SMBJ188CAHE3_A/H 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 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 (PPPM) with 10/1000 µs waveform - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ188CAHE3_A/H datasheet, SMBJ188CAHE3_A/H pinout, SMBJ188CAHE3_A/H application, or SMBJ188CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compliance with UL 497B for surge protector classification.
Technical Context
This device operates as a voltage-clamped shunt protector: during transient overvoltage events exceeding VWM (188 V), it avalanches to divert surge current away from downstream circuitry while maintaining VC ≤ 328 V. Its bidirectional symmetry enables use on AC-coupled or floating lines without polarity concerns.
Constructed with glass-passivated junction and matte tin-plated leads, SMBJ188CAHE3_A/H meets JESD201 Class 2 whisker resistance, MSL Level 1 reflow compatibility (260 °C peak), and UL 94 V-0 flammability rating - supporting automated SMT assembly and high-reliability industrial deployment.
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 test current - defines avalanche onset window under standardized DC bias |
| VC @ IPPM | 328 V at 2.0 A - clamped voltage during 10/1000 µs surge, limiting stress on protected ICs |
| PPPM | 600 W - peak transient energy handling capacity per single 10/1000 µs pulse |
| ID @ VWM | 1.0 µA - low leakage ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJ max. | +150 °C - junction temperature limit enabling operation in harsh ambient environments |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Accepts surge current from either direction; connects to line under protection |
| Cathode | Transient current exit (bidirectional) | Completes shunt path to ground or return rail; identical electrical role to Anode in CA devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC, differential, or floating signal/power lines without polarity constraints |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| 600 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) when properly laid out on PCB |
| UL 497B recognized | Approved for use in telecom and industrial surge protection modules requiring safety certification |
| MSL Level 1 | Zero floor life limitation - supports unlimited exposure to ambient conditions prior to reflow |
Applications
| Industrial Sensor Interface Protection | Telecom Line Surge Suppression |
|---|---|
Use Scenario: Protecting 24 V analog input channels on PLC I/O modules from inductive switching transients and EFT bursts. IC Role / Device Role / Timing Role: Shunt TVS placed between signal line and ground, responding within <1 ps to clamp overvoltage before damage occurs. Use Value: Limits transient voltage to ≤328 V, preserving ADC front-end integrity and meeting IEC 61000-4-4 immunity requirements. |
Use Scenario: Safeguarding RS-485 transceivers on telecom base station backhaul links exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional clamping element across differential pair (A/B), symmetrically suppressing ±1 kV transients. Use Value: Maintains signal integrity during surge events by holding common-mode voltage within transceiver's absolute maximum rating. |
| Automotive Body Control Module (BCM) | AC Power Input Stage Protection |
Use Scenario: Guarding LIN bus nodes in BCM against load dump and ISO 7637-2 Pulse 1/2/5a transients. IC Role / Device Role / Timing Role: Primary TVS on LIN line, placed adjacent to connector to intercept surges before reaching transceiver IC. Use Value: AEC-Q101 qualification ensures survivability across -40 °C to +125 °C ambient and 150 °C junction temperature. |
Use Scenario: Clamping induced surges on 120/230 VAC auxiliary power inputs feeding embedded controllers in smart meters. IC Role / Device Role / Timing Role: Secondary-level protector after MOV, providing fast-response clamping for residual high-frequency spikes. Use Value: Low clamping ratio (VC/VBR ≈ 1.5) minimizes let-through energy compared to slower primary protectors. |
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_A/H | Halogen-free variant; identical electrical specs and AEC-Q101 qualification | Required where RoHS-compliant halogen-free materials are mandated (e.g., EU medical devices) | Select when environmental compliance requires absence of brominated flame retardants |
| SMAJ188CAHE3_A/H | Lower PPPM (400 W), higher RθJA (140 °C/W), same VWM/VC but reduced surge margin | Suitable only for lower-energy transients or space-constrained layouts where SMB footprint is unavailable | Choose only if PCB area limits prevent SMB placement and surge threat level is below IEC 61000-4-5 Level 3 |
Compared with SMBJ188CAHE3_A/H, the HM3 variant offers identical protection performance with halogen-free construction, while SMAJ188CAHE3_A/H trades 33 % peak power derating and higher thermal resistance for smaller SMA package - making SMBJ188CAHE3_A/H optimal for high-energy, thermally demanding deployments.
Availability
SMBJ188CAHE3_A/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, automotive body control modules, and AC power input stages requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ188CAHE3_A/H 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 designs and manufactures discrete semiconductors including diodes, MOSFETs, and optoelectronics, with emphasis on high-reliability, industry-qualified components for automotive, industrial, and computing markets.
The SMBJ series delivers standardized, AEC-Q101-qualified TVS diodes optimized for robust transient suppression in harsh environments - targeting design-in stability across automotive ECUs, factory automation, and infrastructure equipment.
FAQ
What does the "CA" suffix indicate in SMBJ188CAHE3_A/H?
The "CA" suffix denotes a bidirectional configuration: SMBJ188CAHE3_A/H provides symmetrical clamping for both positive and negative transients, unlike unidirectional "A" variants. This eliminates polarity concerns during layout and enables use on AC-coupled or floating lines - critical for RS-485, CAN FD, and sensor bridge applications where voltage polarity reverses.
Is SMBJ188CAHE3_A/H qualified for automotive applications?
Yes, SMBJ188CAHE3_A/H is AEC-Q101 qualified, verified per stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD (HBM ≥ 8 kV). The "HE3" suffix explicitly indicates RoHS-compliant and AEC-Q101-qualified construction, making SMBJ188CAHE3_A/H suitable for body electronics, infotainment, and ADAS subsystems operating up to +125 °C ambient.
What is the maximum clamping voltage (VC) for SMBJ188CAHE3_A/H and under what test condition?
The maximum clamping voltage VC for SMBJ188CAHE3_A/H is 328 V, measured at 2.0 A peak pulse current (IPPM) using the standardized 10/1000 µs double-exponential surge waveform. This value ensures protected circuitry remains within safe operating limits during IEC 61000-4-5 Level 4 (4 kV) surges when mounted per recommended pad layout.
How does the thermal resistance of SMBJ188CAHE3_A/H affect PCB layout?
SMBJ188CAHE3_A/H 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. To maintain TJ ≤ 150 °C under sustained 5.0 W power dissipation, designers must ensure adequate copper area and avoid thermal bottlenecks - undersized pads or narrow traces will elevate junction temperature and reduce surge endurance.
Does SMBJ188CAHE3_A/H meet UL safety standards?
Yes, SMBJ188CAHE3_A/H is Underwriters Laboratories (UL) recognized under file E136766 for both unidirectional and bidirectional configurations, compliant with UL 497B for telecommunications primary protectors. This certification validates its suitability in safety-critical surge protection modules used in telecom infrastructure, industrial gateways, and smart grid equipment.
SMBJ188CAHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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_A/H FAQ
1.How can I place an order for SMBJ188CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ188CAHE3_A/H 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_A/H reliable?
The price and inventory of SMBJ188CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ188CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ188CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ188CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ188CAHE3_A/H?
SMBJ188CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ188CAHE3_A/H 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_A/H?
For technical support, including SMBJ188CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ188CAHE3_A/H requirements.
6.How does Aetrix verify that SMBJ188CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ188CAHE3_A/H 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_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ188CAHE3_A/H?
All SMBJ188CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ188CAHE3_A/H, 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_A/H part is unused and in its original packaging.
Return procedure for SMBJ188CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ188CAHE3_A/H Tags
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