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STMicroelectronics SMCJ188CA-TR
- Part No.:
- SMCJ188CA-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ188CA-TR.pdf
- Description:
- TVS DIODE 188VWM 388VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
SMCJ188CA-TR from STMicroelectronics is a bidirectional 1500 W transient voltage suppression (TVS) diode in SMC package, designed for high-energy ESD and surge protection in DC power lines and signal interfaces. It features a standoff voltage of 188 V, clamping voltage of 328 V at 4.6 A (10/1000 µs), operates up to 150 °C junction temperature, and delivers ≤0.2 µA leakage at 25 °C - suitable for industrial power supply input stages and telecom line protection.
For engineers reviewing the SMCJ188CA-TR datasheet, SMCJ188CA-TR pinout, SMCJ188CA-TR application, or SMCJ188CA-TR equivalent, key selection criteria include bidirectional clamping capability, IEC 61000-4-2 ±30 kV contact/air discharge compliance, low dynamic resistance (26 Ω at 8/20 µs), thermal derating above 25 °C, and SMC footprint compatibility with IPC7531 standards.
Technical Context
This TVS diode uses planar silicon junction technology optimized for low leakage and stable clamping under repeated surge stress. Its bidirectional architecture enables symmetrical overvoltage protection on AC-coupled or floating lines without polarity constraints.
The device meets IEC 61000-4-4 Level 4 (4 kV) and exceeds IEC 61000-4-2 Level 4 (±30 kV), with clamping performance defined across 10/1000 µs and 8/20 µs waveforms. Thermal resistance is specified per JEDEC footprint, supporting reliable operation at Tj = 150 °C with derated peak pulse power down to 1250 W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 188 V - maximum continuous reverse working voltage before breakdown; defines operating margin for 150–200 V DC bus protection |
| Breakdown Voltage (VBR) | 209–220 V at 1 mA - ensures predictable avalanche initiation within 5% tolerance at 25 °C |
| Clamping Voltage (VCL) | 328 V at 4.6 A (10/1000 µs) - limits transient voltage seen by downstream circuitry during surge events |
| Peak Pulse Power (PPP) | 1500 W (10/1000 µs) - sustains 1.5 kW surge energy without failure under standard test waveform |
| Leakage Current (IR) | ≤0.2 µA at 25 °C - minimizes standby power loss and avoids false triggering in high-impedance sensing circuits |
| Junction Temperature Range | −55 to +150 °C - supports deployment in automotive engine compartments and industrial enclosures without derating penalties |
| Dynamic Resistance (RD) | 26 mΩ at 8/20 µs - determines voltage overshoot during fast transients; lower RD improves clamping fidelity |
Pinout & Package
SMCJ188CA-TR is housed in an SMC (DO-214AB) surface-mount package with two terminals: Cathode (K) and Anode (A). The bidirectional configuration means both terminals function symmetrically as clamping nodes - no polarity marking required for installation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Surge current entry point (positive half-cycle) | Accepts transient current during positive voltage excursions; forms one side of bidirectional clamping path |
| Cathode (K) | Surge current entry point (negative half-cycle) | Accepts transient current during negative voltage excursions; completes symmetrical clamping loop with Anode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection on AC lines or ungrounded differential signals without external polarity management |
| Low leakage current | ≤0.2 µA at 25 °C ensures minimal impact on high-impedance voltage dividers and precision reference circuits |
| High-temperature operation | Rated for full 1500 W pulse power at Tj = 150 °C - eliminates need for oversized heatsinking in compact designs |
| IEC 61000-4-2 compliance | Withstands ±30 kV air/contact discharge - exceeds Level 4 requirements for industrial and medical equipment certification |
| JEDEC-compliant SMC outline | Ensures mechanical compatibility with automated pick-and-place systems and standard reflow profiles (J-STD-020 MSL Level 1) |
Applications
| Industrial Power Input Protection | Telecom Line Interface |
|---|---|
Use Scenario: 24–48 V DC input stage of programmable logic controllers (PLCs) exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Primary surge clamp placed upstream of DC-DC converters and microcontroller power rails. Use Value: Limits transient voltage to ≤328 V during 10/1000 µs surges, preventing damage to 36 V-rated input capacitors and LDO regulators. | Use Scenario: Protection of RS-485 transceivers connected to outdoor field wiring subject to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional shunt element across differential pair (A/B) and ground, absorbing common-mode and differential-mode transients. Use Value: Clamps 8/20 µs surges to <388 V while maintaining ≤26 mΩ dynamic resistance - preserving signal integrity up to 10 Mbps. |
| Automotive Body Control Module | Renewable Energy Inverter DC Link |
Use Scenario: 12 V battery-supplied body control modules (BCM) subjected to ISO 7637-2 pulse 1, 2a, and 5a. IC Role / Device Role / Timing Role: Secondary overvoltage suppressor after primary LC filtering, handling residual fast transients. Use Value: Withstands 150 °C ambient under hood conditions while delivering 1250 W clamping power - extends reliability beyond AEC-Q200 Class 3 requirements. | Use Scenario: DC link protection in solar string inverters where PV array inputs experience rapid voltage spikes during cloud-edge transitions. IC Role / Device Role / Timing Role: Parallel-connected TVS across 200–400 V DC bus to limit overvoltage during MOSFET turn-off oscillations. Use Value: 188 V standoff allows safe operation at 300 V nominal bus; 328 V clamping prevents IGBT gate oxide breakdown during 10/1000 µs grid disturbances. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188CA-TR | 600 W rating (vs. 1500 W); same VRWM, VCL, and SMC footprint | Lower surge capacity suits cost-sensitive consumer electronics with infrequent transients | Select when system-level testing confirms ≤600 W surge exposure and board space permits SMB package |
| 1.5KE188CA | Through-hole DO-201 package; 1500 W rating but higher leakage (5 µA) and larger thermal mass | Preferred for legacy designs requiring axial leaded components or manual assembly | Choose only if PCB layout lacks SMD real estate or reworkability is prioritized over thermal performance |
Compared with SMBJ188CA-TR and 1.5KE188CA, SMCJ188CA-TR uniquely balances high-power surge handling (1500 W), ultra-low leakage (0.2 µA), and SMD manufacturability - making it optimal for space-constrained, thermally demanding industrial and automotive power interfaces.
Availability
SMCJ188CA-TR is available at Aetrix Electronics and suitable for industrial power input protection, telecom line interface, automotive body control modules, and renewable energy inverter DC link applications requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ188CA-TR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in power management, analog, MEMS, and microcontrollers for industrial, automotive, and consumer markets.
SMCJ series TVS diodes belong to ST's transient protection product line, engineered specifically for robust, low-leakage surge suppression in high-reliability power and communication systems operating across extended temperature ranges.
FAQ
What is the difference between SMCJ188CA-TR and SMCJ188A-TR?
SMCJ188CA-TR is bidirectional, providing symmetrical clamping for AC or floating lines, while SMCJ188A-TR is unidirectional and requires correct polarity orientation. Their standoff voltage (188 V), clamping behavior, and package are identical - the 'CA' suffix explicitly denotes bidirectional functionality per ST's ordering convention.
Does SMCJ188CA-TR require a heatsink for 1500 W surge handling?
No heatsink is required for single-pulse 1500 W (10/1000 µs) events, as thermal mass and PCB copper area suffice. However, repeated surges demand attention to junction temperature rise: derating curves show usable power drops to ~1250 W at Tj = 150 °C, and thermal impedance depends on PCB copper area per JEDEC footprint recommendations.
Can SMCJ188CA-TR be used in place of a 200 V rated TVS?
No - its 188 V standoff voltage is fixed and tested per IEC 61000-4-2. Using it in a 200 V system risks premature conduction during normal operation. For 200 V applications, select SMCJ200CA-TR (if available) or verify margin against actual system maxima; ST does not list SMCJ200CA in the DS1284 revision 11 family.
Is SMCJ188CA-TR compliant with RoHS and REACH?
Yes - SMCJ188CA-TR carries ECOPACK2 environmental compliance, meeting RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Lead finish is matte tin plating, and packaging conforms to J-STD-020 MSL Level 1, verified in ST's official documentation and datasheet DS1284 Rev 11.
SMCJ188CA-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AB, SMC
- Series:
- SMCJ, TRANSIL™
- 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:
- 388V
- Current - Peak Pulse (10/1000µs):
- 26A (8/20µs)
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMC
SMCJ188CA-TR FAQ
1.How can I place an order for SMCJ188CA-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ188CA-TR 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 SMCJ188CA-TR reliable?
The price and inventory of SMCJ188CA-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ188CA-TR is usually 5 days.
3.What payment methods are accepted for SMCJ188CA-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ188CA-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ188CA-TR?
SMCJ188CA-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ188CA-TR 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 SMCJ188CA-TR?
For technical support, including SMCJ188CA-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ188CA-TR requirements.
6.How does Aetrix verify that SMCJ188CA-TR is sourced from the original manufacturer or authorized distributors?
All SMCJ188CA-TR 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 SMCJ188CA-TR meets industry standards.
7.What is the process for return or replacement of SMCJ188CA-TR?
All SMCJ188CA-TR units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ188CA-TR, 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 SMCJ188CA-TR part is unused and in its original packaging.
Return procedure for SMCJ188CA-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ188CA-TR Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
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