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Taiwan Semiconductor Corporation SMCJ170H
- Part No.:
- SMCJ170H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170H.pdf
- Description:
- 1500W, 210V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:7,425
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Product details
Overview
SMCJ170H from Taiwan Semiconductor is a unidirectional 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 power rails in industrial motor drives against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ170H datasheet, SMCJ170H pinout, SMCJ170H application, or SMCJ170H equivalent, key selection criteria include clamping performance under 10/1000μs surge, AEC-Q101 qualification for automotive-grade reliability, unidirectional polarity marking, and thermal resistance (RθJA = 55°C/W) for high-power transient suppression in space-constrained PCB layouts.
Technical Context
The SMCJ170H operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (189–231V). Its glass-passivated junction ensures stable breakdown and low leakage (<1μA at 170V), while fast response (<1.0ps) enables effective suppression of ESD and lightning-induced surges.
Designed for single-die configuration in DO-214AB, it delivers 1500W peak pulse power (tp = 1ms) with 5.0V forward voltage at 100A, supporting robust surge handling in 24/48V DC systems. Thermal performance is defined by RθJC = 10°C/W and RθJA = 55°C/W, enabling operation up to +150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 189–231 V - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 304 V - Clamping voltage at 5.1 A peak impulse current (10/1000 μs waveform), limiting downstream stress |
| PPK | 1500 W - Peak pulse power dissipation capability for non-repetitive transients |
| IR @ VWM | <1 μA - Reverse leakage at rated stand-off voltage, minimizing standby power loss |
| TJ max | +150 °C - Maximum junction temperature, supporting operation in high-ambient industrial environments |
| RθJA | 55 °C/W - Junction-to-ambient thermal resistance, guiding heatsinking requirements on standard FR-4 |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional configuration with cathode band marking. Matte tin-plated leads, moisture sensitivity level 1 (J-STD-020), UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 170V rail); clamps to anode when transient exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD47 |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) immunity requirements |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal and humidity stress |
| Fast response time | <1.0 ps rise time enables suppression of sub-nanosecond ESD events before sensitive ICs are damaged |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained applications |
Applications
| Industrial Motor Drive Protection | Automotive Power Distribution |
|---|---|
Use Scenario: Suppresses load dump and inductive kickback transients on 24V/48V DC bus lines feeding BLDC motor controllers. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground, clamping surges within 304V to protect gate drivers and MCU power supplies. Use Value: Withstands 1500W pulses without degradation, enabling compliance with ISO 16750-2 and reducing need for redundant protection stages. | Use Scenario: Installed across battery feed to body control modules (BCMs) to survive cold-crank and jump-start voltage spikes. IC Role / Device Role / Timing Role: Standoff-rated at 170V, it remains inactive during normal 12V/24V operation but activates within picoseconds during >189V transients. Use Value: AEC-Q101 qualification and <1μA leakage ensure long-term reliability and zero impact on quiescent current budgets in always-on vehicle systems. |
| Telecom DC Power Input | Renewable Energy Inverter DC Link |
Use Scenario: Protects PoE-powered equipment front-end rectifiers and DC-DC converters from lightning-induced surges on outdoor Ethernet cables. IC Role / Device Role / Timing Role: Mounted at DC input stage, acting as primary clamp before secondary TVS arrays or crowbar circuits. Use Value: 304V clamping voltage limits stress on 36V-rated input capacitors and avoids overvoltage failure in IEEE 802.3af/at-compliant designs. | Use Scenario: Safeguards DC link capacitors and IGBT gate drivers in solar string inverters exposed to grid-switching transients and nearby lightning strikes. IC Role / Device Role / Timing Role: Placed across high-voltage DC bus (e.g., 600–1000V nominal), where SMCJ170H serves as auxiliary clamp for localized 170V rail segments. Use Value: DO-214AB footprint allows dense placement near power semiconductors, while 55°C/W RθJA supports natural convection cooling in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170A | 600W rating, SMB package (smaller footprint), lower PPK and higher VC (344V @ 3.2A) | Lower energy handling; suitable only for lighter-duty 170V rail protection where board space is critical | Select SMBJ170A only if system-level surge energy is ≤600W and layout constraints prohibit DO-214AB size |
| 1.5KE170A | Through-hole TO-218 package, same 170V VWM, but 1500W rating with higher VC (311V @ 4.8A) and slower response (~1ns) | Requires through-hole assembly; less suitable for automated SMT lines and high-density boards | Choose 1.5KE170A only for legacy through-hole designs or where manual rework access is required |
Compared with SMBJ170A and 1.5KE170A, the SMCJ170H provides superior surge energy absorption in a surface-mount package with faster response and lower clamping voltage-making it optimal for modern automotive and industrial SMT assemblies requiring AEC-Q101 compliance and high-reliability transient immunity.
Availability
SMCJ170H is available at Aetrix Electronics and suitable for industrial motor drives, automotive power distribution modules, telecom DC inputs, and renewable energy inverter DC link protection requiring stable component supply and AEC-Q101-qualified surge suppression.
Supply support for SMCJ170H 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, MOSFETs, and power management devices.
The SMCJ series is part of TSC's AEC-Q101-qualified transient suppression portfolio, engineered specifically for high-energy automotive and industrial surge immunity where reliability under ISO 7637-2 and thermal stability at +150°C are mandatory.
FAQ
What is the clamping voltage of the SMCJ170H under a standard 10/1000μs surge?
The SMCJ170H has a maximum clamping voltage (VC) of 304 V at 5.1 A peak impulse current (IPPM), measured using the 10/1000 μs double-exponential waveform per IEC 61000-4-5 and ISO 7637-2. This value ensures downstream components rated for ≤304 V withstand transient events without overstress, provided layout minimizes parasitic inductance.
Is the SMCJ170H unidirectional or bidirectional, and how is polarity marked?
The SMCJ170H is a unidirectional TVS diode, with polarity indicated by a cathode band on the DO-214AB package body. The cathode must be connected to the protected line (e.g., 170V rail), and the anode to reference ground. Bidirectional variants use "CH" or "CAH" suffixes (e.g., SMCJ170CH), which are electrically distinct and not interchangeable with SMCJ170H.
Does the SMCJ170H meet automotive qualification standards?
Yes, the SMCJ170H is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements. It undergoes rigorous stress testing-including temperature cycling, highly accelerated life testing (HALT), and ESD per JESD22-A114-ensuring suitability for under-hood and powertrain applications where reliability is mission-critical.
What is the forward voltage specification for the SMCJ170H, and why does it matter?
The SMCJ170H specifies a forward voltage (VF) of 5.0 V at 100 A, per datasheet Note 2 (applicable to SMCJ100H–SMCJ170H devices). This parameter matters during fault conditions involving high-current forward conduction (e.g., reverse battery connection), where VF determines power dissipation (P = VF × IF) and thermal stress on the device and PCB traces.
Can the SMCJ170H be used in parallel for higher surge current handling?
No-parallel connection of SMCJ170H devices is not recommended due to mismatched VBR tolerances (189–231 V), which cause uneven current sharing and potential thermal runaway. For higher surge capacity, select a single higher-rated device (e.g., 3000W TVS) or implement staged protection with upstream fusing and coordinated clamping voltages.
SMCJ170H 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:
- 1
- Bidirectional Channels:
- -
- 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:
- 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)
SMCJ170H FAQ
1.How can I place an order for SMCJ170H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170H 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 SMCJ170H reliable?
The price and inventory of SMCJ170H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ170H is usually 5 days.
3.What payment methods are accepted for SMCJ170H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170H?
SMCJ170H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170H 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 SMCJ170H?
For technical support, including SMCJ170H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170H requirements.
6.How does Aetrix verify that SMCJ170H is sourced from the original manufacturer or authorized distributors?
All SMCJ170H 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 SMCJ170H meets industry standards.
7.What is the process for return or replacement of SMCJ170H?
All SMCJ170H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170H, 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 SMCJ170H part is unused and in its original packaging.
Return procedure for SMCJ170H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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