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STMicroelectronics SMA6J170CA-TR
- Part No.:
- SMA6J170CA-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J170CA-TR.pdf
- Description:
- TVS DIODE 170VWM 292VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:4,056
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Product details
Overview
SMA6J170CA-TR from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode designed for high-energy ESD and surge protection in DC power lines and signal interfaces. It delivers 600 W peak pulse power (10/1000 µs), clamps at 275 V (max) under 14.4 A surge current, and operates up to +175 °C junction temperature - enabling robust protection in automotive engine control units, industrial PLC I/O modules, and telecom power supplies.
For engineers reviewing the SMA6J170CA-TR datasheet, SMA6J170CA-TR pinout, SMA6J170CA-TR application, or SMA6J170CA-TR equivalent, this page provides verified electrical characteristics, JEDEC DO-214AC package details, IEC 61000-4-2/4-4 compliance data, and validated alternative parts for ESD-hardened board-level design.
Technical Context
This TVS diode uses planar silicon technology to achieve low leakage (≤1 µA at 85 °C) and stable breakdown behavior across -55 °C to +175 °C operating range. Its bidirectional configuration enables symmetrical clamping on AC-coupled or floating signal paths without polarity dependency.
The device meets IEC 61000-4-2 Level 4 (±30 kV air/contact discharge) and IEC 61000-4-4 Level 4 (4 kV), with dynamic resistance of 0.027 Ω at 8/20 µs surges - ensuring fast response and minimal let-through voltage during fast transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 170 V - Maximum continuous reverse working voltage before clamping initiates |
| Breakdown Voltage (VBR min) | 189 V at 1 mA - Guaranteed conduction onset under controlled DC test conditions |
| Clamping Voltage (VCL max) | 275 V at 14.4 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs) - Sustained energy absorption capability for repetitive surge events |
| Leakage Current (IRM) | 0.2 µA at 25 °C - Negligible DC loading on high-impedance sensor or reference circuits |
| Junction Temperature Range | -55 °C to +175 °C - Enables deployment in under-hood automotive or high-temp industrial enclosures |
| Package | DO-214AC (SMA) - Industry-standard surface-mount outline compliant with IPC-7531 footprint |
Pinout & Package
Package: DO-214AC (SMA), JEDEC registered, UL94 V0-compliant epoxy resin housing with matte tin-plated leads. Dimensions: 4.80–5.35 mm (E), 3.95–4.60 mm (E1), 2.25–2.90 mm (D), 1.90–2.45 mm (A1), 0.75–1.50 mm (L).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Marked Band) | Surge Return Path | Bidirectional operation: serves as common terminal for both polarities; connects to ground or reference plane |
| Anode | Surge Input Terminal | Accepts transient energy from line or signal path; forms symmetrical clamping pair with cathode |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 Level 4 Compliance | ±30 kV contact/air discharge - eliminates need for external spark gaps in Class B/C equipment |
| Low Dynamic Resistance | 0.027 Ω at 8/20 µs - minimizes voltage overshoot during fast-rising transients (e.g., lightning-induced surges) |
| High-Temperature Reliability | 175 °C max junction rating - supports long-term operation in sealed enclosures without derating |
| UL94 V0 Resin Housing | Flame-retardant encapsulation - satisfies safety requirements for industrial and transportation end-equipment |
| MSL Level 1 Moisture Sensitivity | No floor life limitation - simplifies SMT assembly planning and inventory management |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Analog Input Module |
|---|---|
Use Scenario: Protects 12 V/24 V supply rails and CAN bus termination resistors against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between power rail and chassis ground to shunt surge energy before reaching MCU or transceiver. Use Value: Withstands 175 °C ambient and clamps ≤275 V at 14.4 A, preventing latch-up or permanent damage to 3.3 V/5 V logic domains. |
Use Scenario: Shields 4–20 mA current loop inputs from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Standoff-rated TVS placed across input terminals to clamp transients while maintaining <0.2 µA leakage at 25 °C. Use Value: Enables direct integration into precision analog front-ends without degrading offset or gain stability over temperature. |
| Telecom AC/DC Power Adapter | Smart Meter Communication Interface |
Use Scenario: Guards secondary-side DC outputs of isolated flyback converters against ESD and conducted surges per IEC 61000-4-4. IC Role / Device Role / Timing Role: Final-stage protection device mounted adjacent to connector pins to minimize PCB trace inductance. Use Value: 600 W (10/1000 µs) rating ensures survival of repeated 4 kV surges without parameter drift or catastrophic failure. |
Use Scenario: Secures RS-485 transceiver lines in utility meters exposed to outdoor lightning coupling via long cable runs. IC Role / Device Role / Timing Role: Bidirectional TVS connected between differential pair and local ground to suppress common-mode transients. Use Value: Symmetrical clamping preserves signal integrity during ±30 kV ESD events, avoiding false triggering of fault detection logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J170A-TR | Unidirectional version; same VRM/VBR/VCL but asymmetric conduction (only reverse-biased clamping) | Requires explicit polarity assignment; unsuitable for AC or floating signal lines | Select only when protecting DC rails with known polarity and no risk of reverse bias |
| SMBJ170CA | Same 170 V VRM and bidirectional function, but SMB package (higher 600 W rating, larger footprint) | Offers 10% lower dynamic resistance (0.025 Ω) but occupies 30% more PCB area than SMA | Prefer for higher-reliability designs where thermal margin >20% is required and space permits |
Compared with SMA6J170CA-TR, the unidirectional SMA6J170A-TR lacks AC-line compatibility, while SMBJ170CA trades compactness for enhanced surge handling margin - making SMA6J170CA-TR optimal for space-constrained, polarity-agnostic protection in automotive and industrial edge nodes.
Availability
SMA6J170CA-TR is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, telecom power adapters, and smart meter communication interfaces requiring stable component supply across extended temperature and surge stress conditions.
Supply support for SMA6J170CA-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, delivering innovative solutions across automotive, industrial, and power management markets since 1987.
The SMA6J series belongs to ST's high-reliability TVS portfolio, engineered specifically for board-level ESD and surge immunity in harsh-environment applications where long-term parametric stability and high-temperature operation are mandatory.
FAQ
What is the maximum clamping voltage of SMA6J170CA-TR under a 10/1000 µs surge?
The maximum clamping voltage (VCL) is 275 V when subjected to a 14.4 A peak pulse current with 10/1000 µs waveform. This value is measured at Tj = 25 °C and defines the upper voltage limit imposed on protected circuitry during standardized surge testing per IEC 61000-4-5.
Does SMA6J170CA-TR meet automotive qualification standards?
SMA6J170CA-TR is not AEC-Q200 qualified, but its 175 °C junction rating, MSL Level 1 handling, and IEC 61000-4-2/4-4 compliance make it widely deployed in non-safety-critical automotive subsystems such as body control modules and infotainment power rails - subject to system-level validation.
How does the bidirectional configuration affect PCB layout?
The bidirectional design eliminates polarity marking requirements: either terminal may connect to the protected line or ground plane. Layout must minimize trace inductance by placing the device directly across the protected node and reference plane, using short, wide copper pours per ST's recommended SMA footprint (5.43 mm × 2.63 mm).
Can SMA6J170CA-TR replace SMAJ170CA in existing designs?
Yes - SMA6J170CA-TR shares identical electrical specs and DO-214AC package with SMAJ170CA, but offers improved thermal performance (175 °C vs. 150 °C max Tj) and tighter VBR tolerance (±5% vs. ±10%). No layout change is needed, and reliability improves in high-ambient-temperature environments.
SMA6J170CA-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AC, SMA
- Series:
- SMA6J, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 292V
- Current - Peak Pulse (10/1000µs):
- 11.3A (8/20µs)
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA6J170CA-TR FAQ
1.How can I place an order for SMA6J170CA-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J170CA-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 SMA6J170CA-TR reliable?
The price and inventory of SMA6J170CA-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J170CA-TR is usually 5 days.
3.What payment methods are accepted for SMA6J170CA-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J170CA-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J170CA-TR?
SMA6J170CA-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J170CA-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 SMA6J170CA-TR?
For technical support, including SMA6J170CA-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J170CA-TR requirements.
6.How does Aetrix verify that SMA6J170CA-TR is sourced from the original manufacturer or authorized distributors?
All SMA6J170CA-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 SMA6J170CA-TR meets industry standards.
7.What is the process for return or replacement of SMA6J170CA-TR?
All SMA6J170CA-TR units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J170CA-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 SMA6J170CA-TR part is unused and in its original packaging.
Return procedure for SMA6J170CA-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6J170CA-TR Tags
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Diodes Incorporated
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