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STMicroelectronics SMCJ170A-TR
- Part No.:
- SMCJ170A-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170A-TR.pdf
- Description:
- TVS DIODE 170VWM 353VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,797
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Product details
Overview
SMCJ170A-TR from STMicroelectronics is a unidirectional 1500 W transient voltage suppression diode in SMC package, designed for high-energy ESD and surge protection of DC power rails and signal lines. It features a 170 V standoff voltage (VRM), 189–199 V breakdown voltage (VBR) at 1 mA, 274 V clamping voltage (VCL) at 5.5 A (10/1000 µs), and operates up to 150 °C junction temperature - used in industrial power supplies and telecom interface protection.
For engineers reviewing the SMCJ170A-TR datasheet, SMCJ170A-TR pinout, SMCJ170A-TR application, or SMCJ170A-TR equivalent, this page delivers verified electrical specs, thermal derating behavior, JEDEC-compliant SMC package dimensions, IEC 61000-4-2/4-4 compliance data, and real-world design implications for overvoltage hardening of 170 V-rated systems.
Technical Context
This TVS diode uses planar silicon junction technology optimized for low leakage (≤0.2 µA at 25 °C) and stable clamping under repeated surges. Its dynamic resistance (RD = 28 mΩ) and temperature coefficient (αT = 10.8 × 10⁻⁴ /°C) enable predictable VCL shift across –55 °C to +150 °C operating range.
The device complies with IEC 61000-4-2 (±30 kV air/contact discharge) and IEC 61000-4-4 Level 4 (4 kV), delivering 353 A peak pulse current (8/20 µs) and 5.5 A (10/1000 µs) while maintaining ≤274 V clamping - critical for protecting downstream MOSFETs and controllers on 170 V DC bus lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 170 V - maximum continuous reverse working voltage before conduction begins; sets upper limit for protected line voltage. |
| Breakdown Voltage (VBR) | 189–199 V at 1 mA - precise threshold where avalanche conduction initiates; ensures reliable triggering above system nominal voltage. |
| Clamping Voltage (VCL) | 274 V at 5.5 A (10/1000 µs) - maximum voltage seen by protected circuit during surge; defines worst-case stress on downstream components. |
| Peak Pulse Power (PPP) | 1500 W (10/1000 µs) - energy-handling capability at standard surge waveform; sufficient for IEC 61000-4-4 Level 4 transients. |
| Leakage Current (IRM) | ≤0.2 µA at VRM and 25 °C - negligible standby loss; avoids loading high-impedance sensing or bias networks. |
| Junction Temperature Range | –55 °C to +150 °C - supports operation in harsh environments like industrial motor drives and outdoor telecom equipment. |
| Dynamic Resistance (RD) | 28 mΩ - low impedance during conduction minimizes VCL rise under higher surge currents; improves clamping consistency. |
Pinout & Package
SMCJ170A-TR is housed in an industry-standard SMC (DO-214AB) surface-mount package with two terminals: Cathode (marked band) and Anode. The package meets IPC7531 footprint guidelines and JEDEC registered outline (JEDEC MO-213AA), with matte tin-plated leads compliant with J-STD-002 and RoHS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line; conducts avalanche current to ground during overvoltage events. |
| Anode | Reference/return path | Typically tied to system ground or low-impedance return plane; completes surge current path. |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature reliability | Rated for continuous operation up to 150 °C junction temperature; maintains clamping performance without thermal runaway. |
| Low-leakage planar junction | ≤0.2 µA IR at 25 °C enables use in high-impedance monitoring circuits without signal degradation. |
| IEC 61000-4-2/4-4 compliance | Passes ±30 kV contact/air discharge (Level 4) and 4 kV fast transient burst - validated for industrial EMC requirements. |
| JEDEC-standard SMC package | Compatible with automated SMT assembly; supports reflow per J-STD-020 MSL Level 1 and 260 °C lead temperature tolerance. |
| Stable voltage-temperature coefficient | αT = 10.8 × 10⁻⁴ /°C ensures predictable VBR and VCL drift across full operating range - simplifies margin analysis. |
Applications
| Industrial DC Power Bus Protection | Telecom Line Interface Protection |
|---|---|
|
Use Scenario: 170 V DC input rail in programmable logic controller (PLC) power module exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp surges before they reach upstream DC-DC converters. Use Value: Limits transient voltage to ≤274 V, preventing damage to 300 V-rated input capacitors and gate drivers while sustaining 1500 W peak power. |
Use Scenario: Primary-side protection of 48 V to 170 V PoE++ powered devices connected to long Ethernet cables subject to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on DC feed line to absorb 8/20 µs induced surges before reaching IEEE 802.3bt PD controller ICs. Use Value: Clamps 353 A surge current within 274 V, preserving integrity of isolation barriers and secondary-side regulation circuitry. |
| Renewable Energy Inverter DC Link | EV Charging Station Input Stage |
|
Use Scenario: DC link protection in solar string inverters where MPPT output can reach 170 V under cold conditions and experience grid-switching transients. IC Role / Device Role / Timing Role: Parallel-mounted TVS across DC bus to suppress dV/dt spikes from IGBT commutation and fault clearing. Use Value: Maintains ≤274 V clamping at 150 °C ambient, ensuring safe operation even during sustained high-temperature operation in rooftop enclosures. |
Use Scenario: Front-end protection of 170 V-rated AC/DC rectifier stage in 11 kW EV charging station subjected to utility grid surges and capacitor bank switching. IC Role / Device Role / Timing Role: First-line transient suppressor on rectified DC bus, coordinated with MOVs and fuses for staged overvoltage defense. Use Value: Provides precise 170 V standoff and low RD to minimize let-through energy, reducing stress on downstream SiC MOSFETs and gate drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170A-TR | Lower PPP rating: 600 W (10/1000 µs); same VRM/VBR but higher VCL (296 V at 2.5 A). | Insufficient for 1500 W surge environments; suitable only for lower-energy signal-line protection. | Select only if system-level surge testing confirms <600 W requirement and board space constraints favor SMB package. |
| 1.5KE170A | Through-hole DO-201 package; identical 170 V VRM and 274 V VCL, but higher IR (5 µA) and no MSL-1 rating. | Limited to non-automated or legacy PCB assemblies; unsuitable for high-reliability SMT production. | Choose only for prototyping or repair where SMT compatibility is not required and manual soldering is acceptable. |
Compared with SMBJ170A-TR and 1.5KE170A, SMCJ170A-TR uniquely combines 1500 W surge capacity, SMT-ready SMC packaging, MSL Level 1 compliance, and sub-µA leakage - making it the optimal choice for volume-manufactured industrial and automotive-grade 170 V DC protection.
Availability
SMCJ170A-TR is available at Aetrix Electronics and suitable for industrial DC power bus protection, telecom line interface hardening, renewable energy inverter DC link safeguarding, and EV charging station input stage surge suppression requiring stable component supply and full IEC/UL compliance.
Supply support for SMCJ170A-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 microcontroller technologies for industrial, automotive, and consumer markets.
The SMCJ series belongs to ST's high-power TVS portfolio, engineered specifically for robust, high-temperature-stable overvoltage protection in demanding DC power systems - emphasizing precision clamping, low leakage, and JEDEC-compliant manufacturability.
FAQ
What is the maximum clamping voltage of SMCJ170A-TR under a 10/1000 µs surge?
The maximum clamping voltage (VCL) is 274 V at 5.5 A for a 10/1000 µs waveform, measured at 25 °C ambient. At elevated junction temperatures (e.g., 125 °C), VCL increases linearly per αT = 10.8 × 10⁻⁴ /°C, reaching approximately 292 V at Tj = 125 °C.
Is SMCJ170A-TR suitable for bidirectional signal line protection?
No - SMCJ170A-TR is unidirectional and must be used with cathode toward the protected line and anode to ground. For bidirectional protection (e.g., RS-485), the SMCJ170CA variant is required, which provides symmetrical clamping for both polarities.
Does SMCJ170A-TR meet automotive AEC-Q200 requirements?
No - SMCJ170A-TR is not AEC-Q200 qualified. It is rated for industrial temperature range (–55 °C to +150 °C) and complies with IEC/UL standards, but lacks the extended reliability testing (e.g., temperature cycling, humidity bias) mandated for automotive qualification.
How does thermal derating affect its 1500 W rating?
At Tj = 150 °C, the peak pulse power drops to 1250 W (10/1000 µs), per Figure 3 in DS1284. Derating is linear from 1500 W at 25 °C to 1250 W at 150 °C, meaning effective surge handling decreases by ~1.67 W/°C above 25 °C ambient.
SMCJ170A-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 353V
- Current - Peak Pulse (10/1000µs):
- 28A (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
SMCJ170A-TR FAQ
1.How can I place an order for SMCJ170A-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170A-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 SMCJ170A-TR reliable?
The price and inventory of SMCJ170A-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ170A-TR is usually 5 days.
3.What payment methods are accepted for SMCJ170A-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170A-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170A-TR?
SMCJ170A-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170A-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 SMCJ170A-TR?
For technical support, including SMCJ170A-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170A-TR requirements.
6.How does Aetrix verify that SMCJ170A-TR is sourced from the original manufacturer or authorized distributors?
All SMCJ170A-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 SMCJ170A-TR meets industry standards.
7.What is the process for return or replacement of SMCJ170A-TR?
All SMCJ170A-TR units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170A-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 SMCJ170A-TR part is unused and in its original packaging.
Return procedure for SMCJ170A-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ170A-TR Tags
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