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Vishay General Semiconductor - Diodes Division SMBJ188CAHE3_B/H
- Part No.:
- SMBJ188CAHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ188CAHE3_B/H.pdf
- Description:
- 600W,188V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,722
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Product details
Overview
SMBJ188CAHE3_B/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), 600 W peak pulse power (10/1000 µs), ≤328 V clamping voltage at 2.0 A IPPM, and operates across –55 °C to +150 °C junction temperature range - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ188CAHE3_B/H datasheet, SMBJ188CAHE3_B/H pinout, SMBJ188CAHE3_B/H application, or SMBJ188CAHE3_B/H equivalent, this part serves as a RoHS-compliant, AEC-Q101-qualified bidirectional TVS for high-voltage transient suppression where precise VWM ≥188 V and low-leakage (<1.0 µA) at stand-off are critical selection criteria.
Technical Context
This device functions as a voltage-clamping protector with symmetrical bidirectional avalanche behavior - no polarity marking, identical electrical characteristics in both directions. Its silicon junction is glass passivated, enabling stable breakdown and low incremental surge resistance under repetitive 10/1000 µs transients at 0.01% duty cycle.
Thermal design relies on RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), requiring minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated PPPM derating. It meets MSL Level 1 (J-STD-020) and supports automated SMT placement with matte tin-plated leads solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - maximum continuous reverse operating voltage before clamping initiates; defines upper limit of normal circuit operation. |
| VBR (min/max) | 209 V / 231 V at IT = 1.0 mA - guaranteed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | ≤328 V at IPPM = 2.0 A (10/1000 µs) - clamped voltage seen by protected circuit; determines residual stress on downstream components. |
| PPPM | 600 W - peak transient energy absorption capability; validates robustness against IEC 61000-4-5 level 4 surges when properly mounted. |
| ID @ VWM | ≤1.0 µA - reverse leakage current at full stand-off; critical for low-power sensor biasing and battery-backed systems. |
| TJ max. | +150 °C - maximum junction temperature; enables use in under-hood automotive or high-ambient industrial environments. |
| Package | SMB (DO-214AA) - standardized 2-pin SMD outline with 5.59 mm max length, 4.06 mm min width, and 2.20 mm max height; compatible with IPC-7351B footprint. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration - no cathode/anode marking; symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no functional distinction - symmetric conduction path. |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; forms complete bidirectional clamping loop across protected line and reference plane. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating differential lines without polarity concerns - eliminates need for dual unidirectional devices. |
| 600 W peak pulse power | Supports IEC 61000-4-5 combination wave (1.2/50 µs voltage, 8/20 µs current) surge immunity up to level 4 when PCB layout follows recommended pad dimensions. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD - suitable for ADAS camera modules and infotainment power rails. |
| MSL Level 1 | Allows unlimited floor life and reflow at peak 260 °C - simplifies manufacturing flow without baking or dry-pack requirements. |
| Glass passivated junction | Ensures stable VBR over lifetime and improved resistance to humidity-induced parameter drift - critical for outdoor telecom infrastructure. |
Applications
| Industrial Sensor Interface | Telecom Line Protection |
|---|---|
|
Use Scenario: Protecting RS-485 transceivers and analog sensor outputs (e.g., 4–20 mA loops) from lightning-induced surges and inductive switching noise in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, absorbing transients before they reach the transceiver IC's ESD structures. Use Value: Maintains signal integrity by limiting voltage excursion to ≤328 V while drawing <1.0 µA leakage at 188 V nominal bus voltage - avoids false triggering or offset errors. |
Use Scenario: Shielding Ethernet PHY power pins (e.g., MDI-X bias rails) and auxiliary control lines in DSLAMs and optical line terminals exposed to induced surges on long copper runs. IC Role / Device Role / Timing Role: Standoff-rated TVS connected from DC supply rail to chassis ground, clamping fast-rising common-mode transients from coupled AC mains or nearby RF sources. Use Value: Withstands repeated 600 W pulses without degradation, enabling compliance with GR-1089-CORE telecom immunity standards without derating penalties. |
| Automotive Body Control Module | AC-DC Power Supply Input Stage |
|
Use Scenario: Safeguarding LIN bus transceivers and microcontroller I/Os in BCMs subjected to load dump and ISO 7637-2 pulse 5a/b in 12 V vehicle architectures. IC Role / Device Role / Timing Role: Bidirectional suppressor bridging LIN data line to local ground, activated within <1 ns to clamp spikes exceeding 188 V standoff. Use Value: AEC-Q101 qualification ensures zero failure under thermal shock and vibration profiles; 150 °C TJ max supports placement near power relays or fuses. |
Use Scenario: Secondary-side transient suppression on +12 V or +24 V DC outputs of industrial SMPS units feeding PLC I/O cards or motor drives. IC Role / Device Role / Timing Role: Final-stage clamping device after bulk filtering, limiting output rail overshoot during hot-swap or short-circuit recovery events. Use Value: Low 1.0 µA leakage prevents unnecessary quiescent current draw; 328 V VC ensures downstream regulators remain within absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ188CA | Same VWM (188 V), identical SMB package, but lower PPPM (400 W vs. 600 W); VC = 328 V at 1.3 A IPPM. | Less margin for high-energy surges; suitable only where IEC 61000-4-5 level 3 is sufficient. | Select if cost sensitivity outweighs need for level 4 surge headroom. |
| ON Semiconductor SMLJ188CA | Same VWM and SMB package; higher PPPM (1500 W), but larger SMC (DO-214AB) footprint - not drop-in. | Requires PCB redesign; better for legacy designs needing upgrade path beyond 600 W. | Choose only when board space allows SMC and system-level testing confirms >600 W requirement. |
Compared with SMBJ188CAHE3_B/H, SMAJ188CA offers reduced surge handling in the same footprint, while SMLJ188CA delivers higher power but mandates layout change - making SMBJ188CAHE3_B/H the optimal balance of AEC-Q101 reliability, 600 W capability, and SMB compatibility.
Availability
SMBJ188CAHE3_B/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, automotive body control modules, and AC-DC power supply input stages requiring stable component supply with AEC-Q101 qualification and RoHS compliance.
Supply support for SMBJ188CAHE3_B/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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, precision, and automotive-grade validation.
The SMBJ series targets high-voltage transient suppression in space-constrained applications, engineered specifically for robustness against inductive switching, ESD, and lightning-induced surges in industrial, telecom, and automotive systems.
FAQ
What does the "CA" suffix indicate in SMBJ188CAHE3_B/H?
The "CA" suffix in SMBJ188CAHE3_B/H denotes a bidirectional configuration - meaning the device provides symmetrical clamping in both polarities, with identical VBR, VC, and leakage characteristics regardless of voltage polarity applied across its terminals. This eliminates the need for polarity-aware placement during assembly and supports AC-coupled or floating signal line protection.
Is SMBJ188CAHE3_B/H suitable for automotive applications?
Yes, SMBJ188CAHE3_B/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3", which explicitly denotes RoHS-compliant and AEC-Q101-qualified variants. It has passed stress tests including temperature cycling, highly accelerated life testing (HALT), and ESD per AEC-Q101, making it appropriate for under-hood and cabin electronics such as BCMs and ADAS sensor power rails.
What is the maximum clamping voltage for SMBJ188CAHE3_B/H under standard test conditions?
The maximum clamping voltage (VC) for SMBJ188CAHE3_B/H is 328 V, measured at peak pulse current (IPPM) of 2.0 A using the standardized 10/1000 µs waveform. This value is guaranteed per Vishay's datasheet (Document Number: 88392, Rev. 09-Jan-2024) and defines the highest voltage the protected circuit will experience during a specified transient event.
How does the SMBJ188CAHE3_B/H differ from unidirectional SMBJ188AHE3_B/H?
SMBJ188CAHE3_B/H is bidirectional with no polarity marking and symmetrical breakdown behavior, whereas SMBJ188AHE3_B/H is unidirectional with a cathode band and conducts only in reverse bias. The "CA" version supports AC or floating-line protection; the "A" version requires correct orientation and is used where forward conduction must be blocked - e.g., DC power rail protection with defined ground reference.
What PCB layout guidance applies to SMBJ188CAHE3_B/H for full 600 W rating?
To achieve the full 600 W peak pulse power rating, SMBJ188CAHE3_B/H must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in Vishay's datasheet Figure 2 derating curves. Smaller pads reduce thermal dissipation and require derating of PPPM - e.g., 400 W at 0.1" × 0.1" pads - compromising surge immunity compliance.
SMBJ188CAHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ188CAHE3_B/H FAQ
1.How can I place an order for SMBJ188CAHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ188CAHE3_B/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_B/H reliable?
The price and inventory of SMBJ188CAHE3_B/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_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ188CAHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ188CAHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ188CAHE3_B/H?
SMBJ188CAHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ188CAHE3_B/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_B/H?
For technical support, including SMBJ188CAHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ188CAHE3_B/H requirements.
6.How does Aetrix verify that SMBJ188CAHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ188CAHE3_B/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_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ188CAHE3_B/H?
All SMBJ188CAHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ188CAHE3_B/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_B/H part is unused and in its original packaging.
Return procedure for SMBJ188CAHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ188CAHE3_B/H Tags
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