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Taiwan Semiconductor Corporation SMCJ170C
- Part No.:
- SMCJ170C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170C.pdf
- Description:
- 1500W, 210V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:4,711
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Product details
Overview
SMCJ170C 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), 189–231V breakdown voltage (VBR), and 304V maximum clamping voltage (VC) at 5.1A 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 SMCJ170C datasheet, SMCJ170C pinout, SMCJ170C application, or SMCJ170C equivalent, this device is selected for high-energy ESD and load-dump protection where fast response (<1.0 ps), low leakage (<1 µA above 170 V), and robust 1500 W peak pulse power are required in compact SMC packaging.
Technical Context
The SMCJ170C is a bipolar TVS diode designed for symmetrical transient suppression in both directions, meeting ISO 7637-2 immunity requirements for automotive electronics. Its glass-passivated junction ensures stable breakdown characteristics and low leakage across -55°C to +150°C operating range.
It delivers 1500 W peak pulse power (tp = 1 ms) with a clamping ratio (VC/VBR) of ~1.61 (304 V / 189 V min), and exhibits thermal resistance of RθJA = 55°C/W and RθJC = 10°C/W - enabling effective heat dissipation in high-density PCB layouts without forced airflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - maximum continuous reverse voltage before clamping begins; defines safe operating margin for 12 V/24 V/48 V systems with transient headroom |
| VBR (min/max) | 189–231 V - breakdown occurs within this range at 1 mA test current; ensures consistent turn-on behavior across production lots |
| VC @ IPPM | 304 V - clamping voltage at 5.1 A peak impulse; limits downstream voltage stress during ISO 7637-2 Pulse 5a (load dump) |
| PPK | 1500 W - peak pulse power handling for 1 ms waveform; supports high-energy transients in automotive power distribution |
| IR @ VWM | <1 µA - ultra-low reverse leakage at rated stand-off; prevents parasitic current draw in battery-backed or low-power circuits |
| TJ max | +150°C - maximum junction temperature; enables operation in under-hood automotive environments and industrial enclosures |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 7.11 mm x 6.22 mm footprint and 2.3 mm height; compatible with automated pick-and-place |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band (bidirectional operation means band denotes terminal symmetry, not unidirectional polarity). Weight: 0.210 g. Moisture sensitivity level: J-STD-020 Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically in bidirectional mode; connected across protected line-to-line or line-to-ground |
| Case (plastic body) | Thermal and mechanical interface | No electrical connection; provides thermal path to PCB copper and mechanical mounting stability |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines or differential buses without polarity concerns - eliminates need for dual-diode arrangements |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect/load dump), and Pulse 3a/3b (switching noise); meets OEM automotive EMC requirements |
| Fast response time | <1.0 ps rise-time response from 0 V to VBR - clamps transients before sensitive ICs experience overvoltage damage |
| Glass passivated junction | Improves long-term reliability and parameter stability under thermal cycling and humidity exposure - critical for automotive under-hood use |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS directives - supports green manufacturing and end-of-life recycling requirements |
Applications
| Automotive Power Distribution | Industrial Motor Drive Protection |
|---|---|
Use Scenario: 24 V battery rail in commercial vehicle ECUs subjected to load dump transients up to 60 V superimposed on 28 V nominal. IC Role / Device Role / Timing Role: Primary clamping element placed between battery input and DC-DC converter input stage. Use Value: Limits voltage to ≤304 V during 12 V/24 V load dump events per ISO 7637-2 Pulse 5a, preventing MOSFET gate oxide rupture and regulator latch-up. | Use Scenario: DC bus in 48 V industrial servo drive exposed to inductive kickback from H-bridge switching. IC Role / Device Role / Timing Role: Bidirectional TVS across DC+ and DC− rails to absorb energy from motor back-EMF and regenerative spikes. Use Value: Absorbs 1500 W peak energy within 1 ms, maintaining bus voltage below 304 V and avoiding overvoltage shutdown of gate drivers and current sensors. |
| LED Streetlight Power Supply | Telecom DC Feeder Protection |
Use Scenario: Outdoor LED luminaire powered via 120 VAC rectified to 170 VDC, subject to lightning-induced surges on AC input and conducted transients on DC output. IC Role / Device Role / Timing Role: Secondary-level TVS on DC output rail after bulk capacitor, protecting constant-current LED driver ICs. Use Value: Clamps 170 V nominal DC rail to 304 V during 1 kV/µs surge events, preserving driver IC lifetime and preventing catastrophic LED string failure. | Use Scenario: 48 V DC feeder line supplying remote radio units in cellular base stations, exposed to induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: Line-to-line TVS on +48 V and return, providing common-mode and differential-mode surge suppression. Use Value: Withstands repeated 1500 W pulses while maintaining <1 µA leakage - avoids DC bias drift in precision current-sense amplifiers upstream. |
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 peak power rating (vs. 1500 W); same VWM/VBR/VC but lower IPPM (2.5 A vs. 5.1 A) | Suitable for lower-energy transients (IEC 61000-4-5 Level 3), not ISO 7637-2 Pulse 5a | Select SMBJ170CA only when board space constraints prevent SMC footprint or when system-level testing confirms 600 W sufficiency. |
| 1.5KE170CA | Through-hole DO-201 package; identical electrical specs but higher RθJA (~65°C/W) and no automated placement support | Used in legacy designs or prototyping where reworkability or manual assembly is prioritized over volume production | Choose 1.5KE170CA for hand-soldered evaluation boards or repair scenarios - avoid in new SMT automotive designs requiring J-STD-020 Level 1 MSL compliance. |
Compared with SMBJ170CA and 1.5KE170CA, the SMCJ170C offers 2.5× higher peak power handling in an automated-assembly-ready SMC package with superior thermal performance (RθJA = 55°C/W), making it the preferred choice for production-grade automotive and industrial transient protection where energy robustness and manufacturability are jointly critical.
Availability
SMCJ170C is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drives, outdoor LED lighting, and telecom DC feeder systems requiring stable component supply across extended temperature ranges and high-reliability transient immunity.
Supply support for SMCJ170C 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, Zener diodes, and MOSFETs for industrial and automotive markets.
The SMCJ series was developed specifically for high-energy transient suppression in automotive electronics and industrial power systems, emphasizing ISO 7637-2 compliance, tight parametric tolerances, and surface-mount manufacturability.
FAQ
What is the clamping voltage of SMCJ170C at its rated peak pulse current?
The SMCJ170C has a maximum clamping voltage (VC) of 304 V at 5.1 A peak impulse current (IPPM), measured using the 10/1000 µs waveform per IEC 61000-4-5. This value ensures downstream components see limited overvoltage during standardized surge events, and is verified per the manufacturer's electrical specifications table for SMCJ170C in the official S2104 datasheet revision.
Is SMCJ170C unidirectional or bidirectional, and how is polarity marked?
The SMCJ170C is a bidirectional TVS diode, indicated by the "C" suffix per Taiwan Semiconductor's ordering nomenclature. Unlike unidirectional variants (e.g., SMCJ170A), it has symmetrical breakdown in both directions and no functional cathode/anode distinction. The physical marking includes a cathode band for mechanical consistency, but it does not imply polarity - both terminals are electrically interchangeable in circuit layout.
Does SMCJ170C meet automotive transient immunity standards?
Yes, the SMCJ170C meets ISO 7637-2 requirements for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnection and load dump), and Pulse 3a/3b (capacitive coupling and switching noise). This compliance is explicitly stated in the FEATURES section of the SMCJ5.0(A)–SMCJ170(A) datasheet (Version S2104), confirming its suitability for automotive ECU, body control module, and infotainment power rail protection.
What is the maximum operating temperature and thermal resistance of SMCJ170C?
The SMCJ170C has a maximum junction temperature (TJ) of +150°C and thermal resistances of RθJA = 55°C/W (junction-to-ambient) and RθJC = 10°C/W (junction-to-case). These values are specified in the THERMAL PERFORMANCE section of the datasheet and enable reliable operation in under-hood automotive environments and sealed industrial enclosures when mounted on ≥1 sq-in. 2-oz copper.
Can SMCJ170C be used in place of SMCJ170A in a design?
No - SMCJ170C and SMCJ170A are not interchangeable without circuit review. SMCJ170C is bidirectional (clamps in both directions), while SMCJ170A is unidirectional (clamps only in reverse bias). Substituting SMCJ170C for SMCJ170A may cause unintended forward conduction or fail to suppress transients on DC-biased lines. Always verify directionality requirements before selecting SMCJ170C.
SMCJ170C 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:
- 304V
- Current - Peak Pulse (10/1000µs):
- 5.1A
- 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:
- DO-214AB (SMC)
SMCJ170C FAQ
1.How can I place an order for SMCJ170C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170C 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 SMCJ170C reliable?
The price and inventory of SMCJ170C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ170C is usually 5 days.
3.What payment methods are accepted for SMCJ170C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170C?
SMCJ170C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170C 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 SMCJ170C?
For technical support, including SMCJ170C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170C requirements.
6.How does Aetrix verify that SMCJ170C is sourced from the original manufacturer or authorized distributors?
All SMCJ170C 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 SMCJ170C meets industry standards.
7.What is the process for return or replacement of SMCJ170C?
All SMCJ170C units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170C, 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 SMCJ170C part is unused and in its original packaging.
Return procedure for SMCJ170C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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