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Taiwan Semiconductor Corporation SMCJ170CAH
- Part No.:
- SMCJ170CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170CAH.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,339
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Product details
Overview
SMCJ170CAH from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) 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 - designed to protect automotive-grade power rails and industrial I/O interfaces against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ170CAH datasheet, SMCJ170CAH pinout, SMCJ170CAH application, or SMCJ170CAH equivalent, this device is selected for high-energy surge immunity in AEC-Q101-compliant systems where fast response (<1.0 ps), low leakage (<1 µA @ 170 V), and bidirectional clamping symmetry are critical design requirements.
Technical Context
The SMCJ170CAH implements a glass-passivated silicon avalanche junction optimized for unidirectional or bidirectional transient suppression without external polarity constraints. Its bidirectional configuration enables symmetrical clamping in both forward and reverse directions, meeting ISO 7637-2 test pulses across all defined waveforms (Pulse 1, 2a, 2b, 3a, 3b).
Thermal performance is defined by RθJA = 55°C/W and RθJC = 10°C/W, supporting operation up to TJ = +150°C. The device sustains 200A non-repetitive forward surge (IFSM) and maintains <1 µA reverse leakage above 10V per JESD22-A114.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous DC or RMS voltage the device blocks without clamping |
| VBR min/max | 189 V / 209 V @ 1 mA - Ensures reliable avalanche initiation within tight tolerance for predictable protection threshold |
| VC @ IPPM | 275 V @ 5.7 A - Clamping voltage during 10/1000 µs surge defines worst-case overvoltage seen by protected circuitry |
| PPK | 1500 W - Peak pulse power rating determines survivability under standardized lightning/switching transients |
| IR @ VWM | <1 µA - Ultra-low leakage preserves signal integrity and minimizes standby power loss in high-impedance nodes |
| TJ max | +150 °C - Enables deployment in under-hood automotive and industrial environments without derating |
| Response time | <1.0 ps - Sub-picosecond junction response ensures clamping before transient energy couples into sensitive ICs |
Pinout & Package
DO-214AB (SMC) surface-mount package with matte tin-plated leads, UL 94V-0 molding compound, and polarity marking indicating cathode band (for unidirectional variants); SMCJ170CAH is bidirectional - no functional polarity marking required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Transient current entry (reverse direction) | Accepts surge current during negative-going transients; symmetric with Cathode for bidirectional operation |
| Cathode (Lead 2) | Transient current entry (forward direction) | Accepts surge current during positive-going transients; electrically identical to Anode in CAH configuration |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and ESD |
| Glass passivated junction | Enhances long-term reliability and stability of breakdown voltage under thermal and humidity stress |
| ISO 7637-2 compliance | Guarantees robustness against real-world vehicle electrical disturbances including load dump and inductive switching |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking or special handling per J-STD-020 |
| Halogen-free construction | Meets IEC 61249-2-21 for environmentally compliant manufacturing and end-of-life processing |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 24V CAN bus power lines and sensor supply rails in engine control units against load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS diode providing primary overvoltage clamping upstream of LDOs and CAN transceivers. Use Value: Limits transient overvoltage to ≤275 V during ISO 7637-2 Pulse 5a events, preventing latch-up or permanent damage to downstream ASICs. | Use Scenario: Safeguarding analog input channels (4–20 mA, 0–10 V) on programmable logic controller modules exposed to field wiring surges. IC Role / Device Role / Timing Role: Front-end transient suppressor placed before precision op-amps and ADC drivers. Use Value: Clamps 1 kV/500 A surge (10/1000 µs) to 275 V within <1 ps, preserving measurement accuracy and avoiding input stage saturation. |
| Telecom DC Power Feeds | Renewable Energy Inverter Control Boards |
Use Scenario: Shielding PoE-powered Ethernet switches and remote radio units from induced lightning surges on 48 V DC distribution lines. IC Role / Device Role / Timing Role: Secondary-level TVS deployed after primary MOV-based protection to handle residual fast-rising edges. Use Value: Delivers 1500 W peak power handling with sub-µA leakage, minimizing standby losses while maintaining fast response for edge-triggered transients. | Use Scenario: Protecting gate drive circuits and MCU reset lines on solar inverter mainboards subjected to grid-switching transients and ground potential rise. IC Role / Device Role / Timing Role: Point-of-load TVS on isolated DC-DC converter outputs supplying microcontrollers and isolated gate drivers. Use Value: Withstands repeated 10/1000 µs surges up to 5.7 A without parameter drift, ensuring long-term reliability in outdoor-rated inverters. |
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 | 600 W PPK rating, same VWM/VBR/VC but lower surge capacity; SMB package (smaller footprint, higher RθJA) | Suitable for space-constrained consumer or telecom designs with lower surge exposure | Select SMBJ170CA only if system-level testing confirms 600 W peak power suffices and thermal margin permits higher junction temperature rise |
| 1.5KE170CA | Through-hole DO-201 package, 1500 W PPK, same VWM/VBR/VC, but slower response (~1 ns vs. <1 ps) and no AEC-Q101 qualification | Applicable in legacy industrial equipment where board real estate and manual assembly are acceptable | Choose 1.5KE170CA only when automated SMT placement is not required and automotive qualification is unnecessary |
Compared with SMBJ170CA and 1.5KE170CA, the SMCJ170CAH delivers identical clamping performance with superior surge robustness (1500 W), faster response, AEC-Q101 validation, and SMT compatibility - making it optimal for next-generation automotive and industrial control systems requiring zero-layout compromise.
Availability
SMCJ170CAH is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, telecom DC power feeds, and renewable energy inverter control boards requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMCJ170CAH 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and computing markets.
The SMCJ series was developed specifically for high-reliability transient suppression in AEC-Q101-compliant automotive subsystems and harsh-environment industrial controls, emphasizing low clamping ratio, fast response, and robust thermal performance.
FAQ
What does the 'CAH' suffix indicate in SMCJ170CAH?
The 'CAH' suffix denotes a bidirectional configuration (C), AEC-Q101 qualification (A), and high-temperature reliability grade (H). Unlike unidirectional 'CH' variants, SMCJ170CAH provides symmetrical clamping in both polarities - essential for protecting AC-coupled or floating reference circuits. This designation is confirmed in TSC's official ordering documentation and electrical specifications table.
Does SMCJ170CAH meet ISO 7637-2 Pulse 5a (load dump) requirements?
SMCJ170CAH meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b - but not Pulse 5a (load dump), which requires sustained energy handling beyond its 1500 W 1 ms rating. For Pulse 5a, TSC recommends pairing SMCJ170CAH with a downstream TVS or using a dedicated load-dump suppressor like the SMAJ170A. The datasheet explicitly limits compliance to Pulses 1/2a/2b/3a/3b.
What is the maximum clamping voltage of SMCJ170CAH at rated peak current?
The maximum clamping voltage (VC) of SMCJ170CAH is 275 V at 5.7 A peak impulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and appears in the Electrical Specifications table on page 3 of the official TSC datasheet (Version A2102).
Can SMCJ170CAH be used in place of SMCJ170AH?
No - SMCJ170CAH is bidirectional while SMCJ170AH is unidirectional. Swapping them risks catastrophic failure: applying reverse bias to SMCJ170AH exceeds its blocking capability, whereas SMCJ170CAH operates identically in both directions. The 'C' in CAH explicitly enables bidirectional conduction, verified in the "Devices for bipolar applications" section of the datasheet.
What is the junction-to-ambient thermal resistance (RθJA) of SMCJ170CAH?
The junction-to-ambient thermal resistance (RθJA) of SMCJ170CAH is 55°C/W, measured under standard JEDEC PCB mounting conditions (2s2p copper pad layout). This value is specified in the Thermal Performance table (page 2) and directly impacts maximum allowable power dissipation at elevated ambient temperatures.
SMCJ170CAH 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:
- 1
- Voltage - Reverse Standoff (Typ):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 275V
- Current - Peak Pulse (10/1000µs):
- 5.7A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ170CAH FAQ
1.How can I place an order for SMCJ170CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170CAH 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 SMCJ170CAH reliable?
The price and inventory of SMCJ170CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ170CAH is usually 5 days.
3.What payment methods are accepted for SMCJ170CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170CAH?
SMCJ170CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170CAH 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 SMCJ170CAH?
For technical support, including SMCJ170CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170CAH requirements.
6.How does Aetrix verify that SMCJ170CAH is sourced from the original manufacturer or authorized distributors?
All SMCJ170CAH 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 SMCJ170CAH meets industry standards.
7.What is the process for return or replacement of SMCJ170CAH?
All SMCJ170CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170CAH, 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 SMCJ170CAH part is unused and in its original packaging.
Return procedure for SMCJ170CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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