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Taiwan Semiconductor Corporation SMCJ170CA
- Part No.:
- SMCJ170CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170CA.pdf
- Description:
- TVS DIODE 170VWM 275VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:1,870
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Product details
Overview
SMCJ170CA from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 170V working stand-off voltage (VWM), 189–209V breakdown voltage (VBR), and 275V maximum clamping voltage (VC) at 5.7A peak impulse current. It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ170CA datasheet, SMCJ170CA pinout, SMCJ170CA application, or SMCJ170CA equivalent, this device is selected for high-energy surge immunity in 24V/48V DC systems, ESD-critical sensor interfaces, and inductive load switching nodes where sub-1ps response and <1µA leakage above 10V are required.
Technical Context
The SMCJ170CA uses a glass-passivated silicon junction optimized for bidirectional clamping across both polarities, meeting ISO 7637-2 immunity requirements without polarity sensitivity. Its thermal design supports 150°C junction operation with RθJA = 55°C/W and RθJC = 10°C/W, enabling reliable performance under sustained ambient temperatures up to +125°C in enclosed enclosures.
It delivers 1500W peak pulse power (tp = 1ms, 10/1000µs waveform) with fast response (<1.0ps from 0V to VBR min) and low leakage (<1µA at VWM = 170V), making it suitable for protecting CAN FD, LIN, and RS-485 transceivers in harsh automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 189 / 209 V @ IT = 1 mA - Confirmed breakdown range ensuring predictable turn-on margin over VWM |
| VC @ IPPM | 275 V @ 5.7 A - Clamping voltage during 10/1000µs surge, limiting downstream voltage stress |
| PPK | 1500 W - Peak pulse power handling per single 1ms transient, compliant with ISO 7637-2 |
| IR @ VWM | <1 µA - Minimal leakage at rated stand-off, preserving low-power system quiescent current |
| TJ max | +150 °C - Maximum junction temperature enabling operation in engine bay or industrial control cabinets |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with 0.210g mass and UL 94V-0 molding compound |
Pinout & Package
DO-214AB (SMC) package: surface-mount, bidirectional, cathode band not applicable (symmetrical terminals). Dimensions conform to JEDEC DO-214AB standard; terminals are matte tin-plated for J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient conduction path | Either terminal serves as input/output - no polarity marking required; clamps positive and negative surges identically |
| Case (body) | Thermal and mechanical interface | Provides primary heat path to PCB copper; requires ≥100 mm² thermal pad for full 1500W derating |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| ISO 7637-2 compliance | Validated against Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (switching noise) |
| Sub-1ps response time | Clamps transients before sensitive ICs experience overvoltage - critical for CAN/LIN bus integrity |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; compatible with standard SMT assembly processes |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 24V battery-supplied ECUs exposed to load-dump transients up to ±100V per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Primary TVS clamp placed upstream of DC-DC converters and microcontroller power inputs. Use Value: Limits rail voltage to ≤275V during 1500W surges, preventing latch-up or permanent damage to 3.3V/5V logic supplies. | Use Scenario: Analog sensor outputs (e.g., pressure, temperature) routed through long cables in factory automation panels. IC Role / Device Role / Timing Role: Bidirectional transient suppressor on differential or single-ended analog lines interfacing to ADC front-ends. Use Value: Maintains signal integrity by clamping EFT bursts (IEC 61000-4-4) to <300V while adding <0.5pF capacitance - no bandwidth degradation. |
| Motor Drive Gate Driver Protection | RS-485 Transceiver Bus Protection |
Use Scenario: High-side/low-side MOSFET gate drive signals subject to inductive kickback from brushed DC motors. IC Role / Device Role / Timing Role: Clamp placed across gate-source terminals of power FETs to absorb dv/dt-induced spikes. Use Value: Prevents gate oxide rupture by limiting VGS to ≤275V during 5.7A transient events, extending FET lifetime in 48V e-bike controllers. | Use Scenario: RS-485 communication lines connecting PLCs and HMIs in electrically noisy plant floors. IC Role / Device Role / Timing Role: Bidirectional TVS on A/B bus lines referenced to local ground, placed adjacent to transceiver pins. Use Value: Survives repeated ±1kV ESD (IEC 61000-4-2) and ±4kV EFT (IEC 61000-4-4) without degradation, ensuring >10-year field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CA (Bourns) | Same VWM (170V), lower PPK (600W), higher VC (288V @ 4.2A) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a | Select only when system-level surge energy is confirmed ≤600W and layout space restricts DO-214AB use |
| 1.5KE170CA (ON Semiconductor) | Through-hole TO-204AA (DO-41), same VWM/VC specs, but 1500W rating at 25°C only (no derating curve provided) | Requires wave soldering or hand-soldering; incompatible with automated SMT lines | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ170CA and 1.5KE170CA, the SMCJ170CA delivers identical clamping performance at full 1500W with validated SMT process support, ISO 7637-2 compliance, and superior thermal dissipation via its larger DO-214AB footprint - making it the preferred choice for production-grade automotive and industrial modules.
Availability
SMCJ170CA is available at Aetrix Electronics and suitable for automotive ECU designs, industrial motor controllers, RS-485 network nodes, and sensor signal conditioning circuits requiring stable component supply and full ISO 7637-2 compliance.
Supply support for SMCJ170CA 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated Taiwanese manufacturer specializing in discrete power semiconductors, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and computing markets.
The SMCJ series was designed specifically for high-reliability transient suppression in 12V–48V DC systems, emphasizing robustness against repetitive surges, low leakage, and seamless integration into automated SMT lines.
FAQ
What does the "CA" suffix indicate in SMCJ170CA?
The "CA" suffix in SMCJ170CA denotes a bidirectional configuration - meaning the device clamps transient voltages of either polarity symmetrically across its terminals. Unlike unidirectional variants (e.g., SMCJ170A), the SMCJ170CA has no cathode marking and functions identically for positive and negative surges, making it ideal for AC-coupled or floating signal lines where polarity is undefined.
Does SMCJ170CA meet ISO 7637-2 for automotive applications?
Yes, the SMCJ170CA is explicitly rated to meet ISO 7637-2 test pulses 1, 2a, 2b, 3a, and 3b per Taiwan Semiconductor's datasheet Version S2104. Its 1500W peak pulse power, fast <1.0ps response, and verified clamping behavior under standardized surge waveforms make it suitable for front-end protection in automotive body control modules, infotainment systems, and ADAS sensors.
What is the maximum clamping voltage of SMCJ170CA and at what current is it specified?
The maximum clamping voltage (VC) of the SMCJ170CA is 275 V, measured at a peak impulse current (IPPM) of 5.7 A using the standardized 10/1000 µs double-exponential waveform. This value ensures downstream circuitry remains within safe operating limits during worst-case transients defined in ISO 7637-2 and IEC 61000-4-5.
Can SMCJ170CA be used in place of a unidirectional SMCJ170A?
No - the SMCJ170CA is bidirectional and lacks polarity marking, while the SMCJ170A is unidirectional with a defined cathode band. Substituting SMCJ170CA for SMCJ170A in DC-biased circuits may cause unintended forward conduction or incorrect clamping behavior. Always verify circuit topology: use SMCJ170CA only where symmetrical surge protection is required.
What is the thermal resistance from junction to ambient (RθJA) for SMCJ170CA?
The junction-to-ambient thermal resistance (RθJA) for the SMCJ170CA is 55°C/W under standard JEDEC test conditions (single-layer 1 in² copper pad). Actual thermal performance depends on PCB layout: doubling copper area reduces RθJA by ~15%, and adding internal thermal vias can improve it further. The device's RθJC is 10°C/W, confirming efficient heat transfer to the case.
SMCJ170CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMCJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 2
- Voltage - Reverse Standoff (Typ):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 275V
- Current - Peak Pulse (10/1000µs):
- 5.5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ170CA FAQ
1.How can I place an order for SMCJ170CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170CA 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 SMCJ170CA reliable?
The price and inventory of SMCJ170CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ170CA is usually 5 days.
3.What payment methods are accepted for SMCJ170CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170CA?
SMCJ170CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170CA 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 SMCJ170CA?
For technical support, including SMCJ170CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170CA requirements.
6.How does Aetrix verify that SMCJ170CA is sourced from the original manufacturer or authorized distributors?
All SMCJ170CA 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 SMCJ170CA meets industry standards.
7.What is the process for return or replacement of SMCJ170CA?
All SMCJ170CA units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170CA, 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 SMCJ170CA part is unused and in its original packaging.
Return procedure for SMCJ170CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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