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Vishay General Semiconductor - Diodes Division SMCJ188CAHE3/9AT
- Part No.:
- SMCJ188CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ188CAHE3/9AT.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,954
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Product details
Overview
SMCJ188CAHE3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 1500 W peak pulse power rating, 188 V standoff voltage (VWM), and clamping voltage of 328 V at 4.6 A peak pulse current. It protects sensitive signal lines and power rails in automotive, industrial, and telecom systems against lightning-induced transients and inductive switching spikes.
For engineers reviewing the SMCJ188CAHE3/9AT datasheet, SMCJ188CAHE3/9AT pinout, SMCJ188CAHE3/9AT application, or SMCJ188CAHE3/9AT equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1500 W PPPM rating, 188 V VWM, and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transient overvoltages exceeding its breakdown threshold (209–231 V). Its bidirectional symmetry ensures identical clamping behavior in both polarities, eliminating polarity marking requirements on PCBs.
Constructed with a glass-passivated silicon junction and housed in an SMC (DO-214AB) thermally robust package, the SMCJ188CAHE3/9AT delivers low incremental surge resistance and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W - sustains high-energy surges without failure under standardized lightning impulse testing |
| Standoff Voltage (VWM) | 188 V - maximum continuous reverse operating voltage before clamping initiates |
| Breakdown Voltage (VBR) | 209–231 V at 1 mA - precise voltage threshold where avalanche conduction begins |
| Clamping Voltage (VC) | 328 V at 4.6 A IPPM - maximum voltage seen by protected circuit during full-rated surge |
| Operating Temperature | −55 °C to +150 °C - supports under-hood automotive and industrial ambient conditions |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress |
Pinout & Package
SMCJ188CAHE3/9AT uses a 2-terminal SMC (DO-214AB) package with no polarity marking-both terminals are functionally symmetric due to bidirectional construction. The device mounts across protected lines (e.g., differential signal pair or supply-to-ground) without orientation constraints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no fixed polarity |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; enables placement flexibility and eliminates orientation checks |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal paths without polarity concerns |
| AEC-Q101 qualification | Validated for automotive electronics including engine control units and ADAS sensor interfaces |
| 1500 W peak pulse rating | Meets IEC 61000-4-5 Level 4 (4 kV line-to-line, 2 kV line-to-ground) surge immunity requirements |
| Low thermal resistance (RθJL = 15 °C/W) | Supports rapid heat dissipation into PCB copper pads, enabling reliable operation under repeated surges |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, reducing manufacturing overhead |
Applications
| Automotive CAN Bus Protection | Industrial Sensor Signal Lines |
|---|---|
|
Use Scenario: Protecting CAN_H/CAN_L differential pair in vehicle body control modules against load dump and ESD events. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly across bus lines, clamping surges before they reach transceiver ICs. Use Value: Maintains CAN signal integrity up to 1 Mbps while surviving 1500 W surges per ISO 16750-2 pulse 5a. |
Use Scenario: Safeguarding analog output (4–20 mA) and digital I²C lines of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional clamp between signal and ground or across differential pairs to limit transient overshoot. Use Value: Prevents sensor data corruption and microcontroller reset during motor contactor switching transients. |
| Telecom DSL Line Interface | Power Supply Input Stage |
|
Use Scenario: Front-end protection of ADSL/VDSL line drivers exposed to lightning-induced surges on outside plant wiring. IC Role / Device Role / Timing Role: Primary surge arrestor placed before transformer coupling and line driver ICs. Use Value: Clamps induced common-mode voltages to <328 V, preserving line driver SOA and meeting GR-1089-CORE requirements. |
Use Scenario: Secondary-level surge suppression on 24 V DC input rails of industrial HMIs and embedded controllers. IC Role / Device Role / Timing Role: Parallel-connected TVS across input capacitor to absorb residual transients after primary MOV/GDT stage. Use Value: Limits voltage overshoot to safe levels for downstream DC/DC converters and LDOs during 10/1000 μs surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188CAHE3/57T | Lower PPPM (600 W), SMB (DO-214AA) package, same VWM and VBR range | Suitable for space-constrained designs with lower surge energy requirements | Select when board area is limited and peak surge energy does not exceed 600 W |
| SMCJ188AHE3/9AT | Unidirectional version; includes cathode band marking and forward voltage spec (VF = 3.5 V @ 100 A) | Required only where DC bias or polarity-specific clamping is needed (e.g., single-supply rail protection) | Choose unidirectional SMCJ188AHE3/9AT only if circuit topology mandates polarity-aware clamping |
Compared with SMCJ188CAHE3/9AT, the SMBJ188CAHE3/57T offers reduced surge handling in a smaller footprint, while the SMCJ188AHE3/9AT adds polarity definition and forward conduction capability-neither is pin-compatible, but both share identical VWM, VBR, and mounting pad layout compatibility.
Availability
SMCJ188CAHE3/9AT is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, and telecom line interface cards requiring stable component supply with AEC-Q101 assurance and long-term production continuity.
Supply support for SMCJ188CAHE3/9AT 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 SMCJ series was engineered for high-power transient suppression in harsh environments, targeting automotive, industrial, and infrastructure applications demanding robustness beyond standard JEDEC ratings.
FAQ
What is the clamping voltage of SMCJ188CAHE3/9AT at its rated peak pulse current?
The SMCJ188CAHE3/9AT has a maximum clamping voltage (VC) of 328 V at its specified peak pulse current (IPPM) of 4.6 A under a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during full-rated surge events. The SMCJ188CAHE3/9AT maintains this clamping performance across its full operating temperature range.
Is SMCJ188CAHE3/9AT suitable for automotive applications?
Yes, SMCJ188CAHE3/9AT is AEC-Q101 qualified and specifically designed for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its qualification covers temperature cycling, highly accelerated life testing, and ESD robustness. The SMCJ188CAHE3/9AT also meets MSL Level 1 for lead-free reflow, supporting modern automotive manufacturing processes.
How does the bidirectional design of SMCJ188CAHE3/9AT affect PCB layout?
The bidirectional nature of SMCJ188CAHE3/9AT eliminates polarity marking and orientation constraints during placement-either terminal may connect to either side of the protected line pair. This simplifies layout, reduces assembly errors, and enables symmetric routing for differential signals. The SMCJ188CAHE3/9AT requires no cathode band alignment, unlike unidirectional variants.
What is the thermal resistance from junction to lead for SMCJ188CAHE3/9AT?
The SMCJ188CAHE3/9AT has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W, measured per JEDEC standards. This low value enables efficient heat transfer from the silicon die to the PCB copper pads via the leads, supporting reliable operation under repetitive surge conditions. The SMCJ188CAHE3/9AT achieves this with its SMC (DO-214AB) package's wide metal strap construction.
Does SMCJ188CAHE3/9AT require derating at elevated ambient temperatures?
Yes, SMCJ188CAHE3/9AT must be derated above TA = 25 °C per Figure 2 in the Vishay datasheet (Doc. #88394). Its peak pulse power capability decreases linearly with junction temperature, reaching ~50% of 1500 W at TJ ≈ 100 °C. Designers must calculate worst-case junction temperature using RθJA = 75 °C/W and ensure the SMCJ188CAHE3/9AT remains within −55 °C to +150 °C operating range.
SMCJ188CAHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- 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):
- 4.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCJ)
SMCJ188CAHE3/9AT FAQ
1.How can I place an order for SMCJ188CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ188CAHE3/9AT 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 SMCJ188CAHE3/9AT reliable?
The price and inventory of SMCJ188CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ188CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ188CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ188CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ188CAHE3/9AT?
SMCJ188CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ188CAHE3/9AT 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 SMCJ188CAHE3/9AT?
For technical support, including SMCJ188CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ188CAHE3/9AT requirements.
6.How does Aetrix verify that SMCJ188CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ188CAHE3/9AT 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 SMCJ188CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ188CAHE3/9AT?
All SMCJ188CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ188CAHE3/9AT, 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 SMCJ188CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ188CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ188CAHE3/9AT Tags
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