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Vishay General Semiconductor - Diodes Division SMBJ188CAHM3/H
- Part No.:
- SMBJ188CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ188CAHM3/H.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,826
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Product details
Overview
SMBJ188CAHM3/H 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, 600 W peak pulse power (10/1000 µs), 2.0 A maximum clamping current (IPPM), and 328 V maximum clamping voltage (VC) - deployed in industrial sensor interfaces and telecom power rails.
For engineers reviewing the SMBJ188CAHM3/H datasheet, SMBJ188CAHM3/H pinout, SMBJ188CAHM3/H application, or SMBJ188CAHM3/H equivalent, this device is selected for high-VWM transient protection where bidirectional surge immunity, low leakage (<1.0 µA at VWM), and AEC-Q101-qualified halogen-free construction are required in space-constrained PCB layouts.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (209–231 V), VC (328 V), and ID (<1.0 µA) specifications in either direction. Its junction temperature range spans –55 °C to +150 °C, and it meets MSL Level 1 per J-STD-020 with 260 °C reflow peak tolerance.
The device uses a glass-passivated silicon junction and achieves 600 W peak pulse power handling under standardized 10/1000 µs waveform conditions. Its thermal resistance is 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), supporting reliable operation without heatsinking in typical 0.2" × 0.2" copper pad layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - Maximum continuous reverse operating voltage before clamping begins; defines upper limit of normal circuit operation. |
| VBR (min/max) | 209 V / 231 V at 1 mA - Breakdown threshold range; ensures consistent turn-on behavior across production lots. |
| VC @ IPPM | 328 V - Clamped voltage during 2.0 A 10/1000 µs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 600 W - Peak surge power dissipation capability; enables robust protection against lightning-induced or inductive-switching transients. |
| ID @ VWM | <1.0 µA - Reverse leakage current at rated stand-off voltage; minimizes standby power loss and avoids false triggering. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in high-ambient environments such as industrial enclosures or automotive under-hood zones. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated pick-and-place and reflow assembly. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminal structure with cathode/anode interchangeable in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity surge) | Accepts reverse surge current during negative-going transients; forms one half of symmetrical clamping path. |
| Cathode | Transient current entry (positive polarity surge) | Accepts forward surge current during positive-going transients; completes bidirectional clamping loop with Anode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal/power lines without external polarity management. |
| 600 W peak pulse power (10/1000 µs) | Withstands high-energy surges common in industrial motor drives and telecom line interfaces without degradation. |
| Halogen-free, RoHS-compliant (HM3 suffix) | Meets environmental compliance requirements for export and end-of-life processing in global electronics manufacturing. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and surge endurance testing. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or pre-bake requirements. |
Applications
| Industrial Sensor Interface Protection | Telecom DC Power Rail Clamp |
|---|---|
Use Scenario: Protecting 24 V analog input channels on PLC I/O modules from inductive switching noise and ESD events. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal and ground to clamp ±1 kV EFT bursts and 4 kV contact ESD. Use Value: Prevents latch-up or damage to precision op-amps and ADC front-ends while maintaining <1.0 µA leakage at 24 V nominal. |
Use Scenario: Safeguarding 48 V DC power inputs in VoIP gateways and base station control cards against lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of DC-DC converters and PMICs, absorbing up to 600 W transient energy. Use Value: Limits rail voltage excursion to ≤328 V during 10/1000 µs surges, preserving downstream regulator integrity and system uptime. |
| Automotive Body Control Module (BCM) | Consumer Appliance Motor Drive Protection |
Use Scenario: Suppressing load-dump transients on LIN bus power lines in AEC-Q101-compliant body electronics. IC Role / Device Role / Timing Role: Bidirectional TVS connected between VBAT and GND to clamp ISO 7637-2 Pulse 5a/b events up to 110 V. Use Value: Enables use of SMBJ188CAHM3/H in automotive applications without derating due to its qualified temperature and surge performance. |
Use Scenario: Shielding microcontroller GPIOs and H-bridge gate drivers in smart washing machine motor controllers. IC Role / Device Role / Timing Role: Fast-response TVS placed at motor driver IC supply pins to suppress commutation spikes from brushed DC motors. Use Value: Achieves sub-nanosecond response time and 328 V clamping to prevent gate oxide rupture in MOSFET drivers during stall conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188CAHE3/H | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification. | Preferred for commercial-grade designs where halogen content is unrestricted. | Select when cost-sensitive sourcing or legacy BOM compatibility requires non-halogen-free variant. |
| SMBJ188CAHM3/B | Identical electrical and mechanical specs; differs only in tape-and-reel packaging (3200 pcs vs. 750 pcs per reel). | Used in high-volume production requiring larger reels to reduce changeover frequency. | Choose for automated SMT lines with bulk feeder support and extended run-time requirements. |
Compared with SMBJ188CAHM3/H, the HE3/H variant trades halogen-free compliance for lower unit cost, while the HM3/B offers identical performance in higher-reel-volume packaging - enabling optimization for environmental compliance, cost, or production throughput.
Availability
SMBJ188CAHM3/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom DC power rails, automotive body control modules, and consumer appliance motor drive circuits requiring stable component supply and long-term lifecycle assurance.
Supply support for SMBJ188CAHM3/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series targets high-energy transient suppression in compact surface-mount form factors, engineered for industrial automation, automotive electronics, and communications infrastructure where robustness and consistency are critical.
FAQ
What is the clamping voltage of SMBJ188CAHM3/H under a 10/1000 µs surge?
The SMBJ188CAHM3/H has a maximum clamping voltage (VC) of 328 V when subjected to its rated peak pulse current (IPPM) of 2.0 A under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMBJ188CAHM3/H suitable for automotive applications?
Yes, SMBJ188CAHM3/H is AEC-Q101 qualified and explicitly listed in Vishay's automotive ordering codes (HM3 suffix). It undergoes rigorous stress testing including temperature cycling, humidity bias, and surge endurance - making it appropriate for body electronics, infotainment power supplies, and LIN/CAN bus protection in passenger vehicles and commercial vehicles.
What does the "CA" suffix indicate in SMBJ188CAHM3/H?
The "CA" suffix in SMBJ188CAHM3/H denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMBJ188AHM3/H), it has no polarity marking and functions identically regardless of voltage polarity applied across its terminals.
How does the HM3 suffix differ from E3 or HE3 in SMBJ188CAHM3/H?
The HM3 suffix indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from E3 (RoHS only, commercial grade), HE3 (RoHS + AEC-Q101, but not halogen-free), and M3 (halogen-free + RoHS, commercial grade). SMBJ188CAHM3/H thus satisfies strict environmental and automotive reliability requirements simultaneously.
What is the thermal resistance of SMBJ188CAHM3/H, and how does it affect layout?
SMBJ188CAHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W. These values assume mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe operation below +150 °C junction temperature, PCB layout must provide adequate copper area and avoid excessive ambient heating near the SMBJ188CAHM3/H location.
SMBJ188CAHM3/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:
- 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:
- 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)
SMBJ188CAHM3/H FAQ
1.How can I place an order for SMBJ188CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ188CAHM3/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 SMBJ188CAHM3/H reliable?
The price and inventory of SMBJ188CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ188CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMBJ188CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ188CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ188CAHM3/H?
SMBJ188CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ188CAHM3/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 SMBJ188CAHM3/H?
For technical support, including SMBJ188CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ188CAHM3/H requirements.
6.How does Aetrix verify that SMBJ188CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ188CAHM3/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 SMBJ188CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMBJ188CAHM3/H?
All SMBJ188CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ188CAHM3/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 SMBJ188CAHM3/H part is unused and in its original packaging.
Return procedure for SMBJ188CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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