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Vishay General Semiconductor - Diodes Division SMCJ188CAHE3_A/I
- Part No.:
- SMCJ188CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ188CAHE3_A/I.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,487
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Product details
Overview
SMCJ188CAHE3_A/I 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 stand-off voltage (VWM), and clamping voltage of 328 V at 4.6 A peak pulse current. It protects sensitive ICs and MOSFETs in automotive power systems, industrial sensor interfaces, and telecom line circuits against lightning-induced transients and inductive switching spikes.
For engineers reviewing the SMCJ188CAHE3_A/I datasheet, SMCJ188CAHE3_A/I pinout, SMCJ188CAHE3_A/I application, or SMCJ188CAHE3_A/I equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification status, 1500 W PPPM capability under 10/1000 µs waveform, thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT assembly on standard PCB copper pad layouts.
Technical Context
This device operates as a voltage-clamped crowbar during transient overvoltage events, leveraging an avalanche breakdown mechanism to shunt surge current away from protected circuitry. Its bidirectional symmetry ensures identical clamping performance in both polarities, eliminating polarity sensitivity in AC-coupled or differential signal paths.
Designed for robustness in harsh environments, the SMCJ188CAHE3_A/I features glass-passivated junction construction, meets MSL Level 1 per J-STD-020, withstands 260 °C lead-free reflow, and delivers stable operation across -55 °C to +150 °C junction temperature range - critical for under-hood automotive and industrial control applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 188 V - maximum continuous reverse voltage before conduction begins; defines operating margin below clamping threshold |
| VC (Clamping Voltage) | 328 V at IPPM = 4.6 A - peak voltage seen by protected circuit during full-rated 10/1000 µs surge event |
| PPPM (Peak Pulse Power) | 1500 W - energy-handling capacity under standardized 10/1000 µs waveform; determines survivability against lightning surges |
| TJ max. | +150 °C - maximum allowable junction temperature; enables use in high-ambient environments like engine control units |
| RθJA | 75 °C/W - thermal resistance from junction to ambient; informs heatsinking requirements on standard 8 mm × 8 mm copper pads |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 2.06 mm height and 7.75 mm body length; compatible with pick-and-place equipment |
Pinout & Package
SMCJ188CAHE3_A/I is a two-terminal bidirectional TVS diode housed in SMC (DO-214AB) package. No polarity marking is present on the case, as both terminals are functionally symmetric. The device mounts with cathode/anode terminals connected across the protected line and return path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as input or return path; no fixed polarity - connects across protected node and ground or reference rail |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamping pair for AC or floating differential signals |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR min/max (209 V / 231 V) and VC (328 V) in both directions - eliminates need for polarity-aware layout in AC or differential bus protection |
| AEC-Q101 qualification | Validated for automotive electronics per stress test requirements - supports deployment in ADAS sensors, body control modules, and infotainment power rails |
| Low incremental surge resistance | Enables tight clamping window (VBR to VC spread ≈ 119 V) - minimizes overvoltage exposure time for downstream MOSFETs and microcontrollers |
| MSL Level 1 compliance | Rated for unlimited floor life and 260 °C peak reflow profile - ensures manufacturability in high-volume SMT lines without baking preconditioning |
| Glass-passivated junction | Provides stable leakage (<1 μA at VWM) and long-term parameter stability under thermal cycling and humidity exposure |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V/24 V battery-connected ECUs from load dump and alternator surge transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between power rail and chassis ground to limit transient excursions to ≤328 V. Use Value: Prevents latch-up or gate oxide damage in MCU power supplies and CAN transceivers during ISO 7637-2 Pulse 5a events. |
Use Scenario: Shielding analog output lines of pressure/temperature sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Low-capacitance TVS across signal and return path to suppress EFT bursts (IEC 61000-4-4) without distorting 4–20 mA signals. Use Value: Maintains signal integrity while absorbing >1 kV/50 Ω fast transients - verified via <1 μA ID at 188 V VWM. |
| Telecom Line Interface Protection | Motor Drive Gate Driver Protection |
|
Use Scenario: Safeguarding Ethernet PHY interface transformers and PoE injectors against lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Bidirectional TVS across transformer secondary windings to clamp differential and common-mode overvoltages simultaneously. Use Value: Withstands 1500 W peak pulse without degradation - meets Telcordia GR-1089-CORE Level 3 surge immunity requirements. |
Use Scenario: Protecting high-side and low-side gate drivers in BLDC motor inverters from shoot-through-inducing voltage spikes. IC Role / Device Role / Timing Role: Clamping device placed between gate and source terminals to limit dV/dt-induced Miller turn-on during switching transitions. Use Value: Fast response time and low Rsurge ensure clamping occurs within nanoseconds - prevents false triggering of SiC MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC188CA | Same VWM (188 V) and PPPM (1500 W), but in smaller SMA (DO-214AC) package; higher RθJA (100 °C/W) limits power handling in sustained surge conditions | Limited to lower-duty-cycle surges due to thermal constraints; unsuitable for automotive load dump where multiple pulses occur | Select only when board space is constrained and surge duty cycle is strictly single-event or low repetition rate |
| SMCJ188CAHM3_A/I | Identical electrical specs and AEC-Q101 qualification, but halogen-free and RoHS-compliant per JEDEC J-STD-020; same SMC package and thermal performance | No functional difference; used where halogen-free material compliance is mandated by OEM or regional environmental regulations | Drop-in replacement when halogen-free bill-of-materials is required; no design or layout changes needed |
Compared with SAC188CA, the SMCJ188CAHE3_A/I offers superior thermal management (75 vs. 100 °C/W) enabling reliable operation under repeated surge stress; versus SMCJ188CAHM3_A/I, it shares identical performance but differs only in material compliance - making HE3 the default choice for general automotive and industrial use.
Availability
SMCJ188CAHE3_A/I is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom line surge suppression requiring stable component supply, AEC-Q101 validation, and 1500 W transient energy absorption.
Supply support for SMCJ188CAHE3_A/I 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMCJ series was engineered specifically for high-energy transient suppression in demanding environments - delivering consistent clamping performance, AEC-Q101 qualification, and robust SMT manufacturability across 5.0 V to 188 V VWM ratings.
FAQ
What is the clamping voltage of the SMCJ188CAHE3_A/I under full-rated surge conditions?
The SMCJ188CAHE3_A/I clamps to 328 V when subjected to its maximum rated peak pulse current of 4.6 A under the standard 10/1000 µs waveform. This value is measured at the device terminals and represents the highest voltage that will appear across protected circuitry during a worst-case transient event - a critical parameter for ensuring downstream components remain within safe operating limits.
Is the SMCJ188CAHE3_A/I suitable for automotive applications?
Yes, the SMCJ188CAHE3_A/I is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 moisture sensitivity, and validated performance across -55 °C to +150 °C operating temperatures - meeting requirements for engine bay, chassis, and infotainment subsystems. The "HE3" suffix confirms this qualification.
How does the bidirectional nature of the SMCJ188CAHE3_A/I affect its placement on the PCB?
The SMCJ188CAHE3_A/I has no polarity marking and functions identically in both directions, so it can be placed across any two nodes requiring symmetrical overvoltage protection - such as differential signal pairs, AC power inputs, or floating sensor bridges. Unlike unidirectional TVS diodes, no orientation check is needed during assembly, reducing manufacturing error risk and simplifying layout.
What is the thermal resistance of the SMCJ188CAHE3_A/I, and how does it impact layout?
The SMCJ188CAHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. To maintain safe junction temperatures during repetitive surges, designers must provide adequate copper area and avoid excessive trace impedance - undersized pads may cause premature thermal failure even within datasheet current limits.
Does the SMCJ188CAHE3_A/I meet RoHS and lead-free assembly requirements?
Yes, the SMCJ188CAHE3_A/I is RoHS-compliant and rated for lead-free reflow soldering with a maximum peak temperature of 260 °C, per J-STD-020. Its matte tin-plated leads are solderable per J-STD-002 and JESD 22-B102, and it passes JESD 201 Class 2 whisker testing - confirming suitability for modern high-reliability SMT production lines.
SMCJ188CAHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- 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):
- 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_A/I FAQ
1.How can I place an order for SMCJ188CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ188CAHE3_A/I 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_A/I reliable?
The price and inventory of SMCJ188CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ188CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ188CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ188CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ188CAHE3_A/I?
SMCJ188CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ188CAHE3_A/I 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_A/I?
For technical support, including SMCJ188CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ188CAHE3_A/I requirements.
6.How does Aetrix verify that SMCJ188CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ188CAHE3_A/I 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_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ188CAHE3_A/I?
All SMCJ188CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ188CAHE3_A/I, 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_A/I part is unused and in its original packaging.
Return procedure for SMCJ188CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ188CAHE3_A/I Tags
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