My Inquiry
My Account
Taiwan Semiconductor Corporation SMCJ170CH
- Part No.:
- SMCJ170CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170CH.pdf
- Description:
- 1500W, 210V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:7,023
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ170CH 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-designed for automotive-grade ESD and load-switching surge protection in power supply rails.
For engineers reviewing the SMCJ170CH datasheet, SMCJ170CH pinout, SMCJ170CH application, or SMCJ170CH equivalent, this device delivers AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1ps response time, <1μA reverse leakage above 10V, and robust thermal performance (RθJC = 10°C/W) for high-reliability industrial and automotive electronics.
Technical Context
The SMCJ170CH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (189–231V), clamping transients to ≤304V at 5.1A per 10/1000μs waveform. Its glass-passivated junction ensures stable breakdown and low leakage (<1μA @ VWM).
Designed for automotive environments, it meets AEC-Q101 stress requirements and ISO 7637-2 immunity standards-including Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling). Thermal design leverages RθJA = 55°C/W and RθJC = 10°C/W for PCB-level heat dissipation.
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; defines turn-on threshold |
| VC @ IPPM | 304 V - Clamped voltage during 5.1 A, 10/1000 μs surge; determines protected circuit's max overvoltage exposure |
| PPK | 1500 W - Peak pulse power handling capability for non-repetitive 1 ms surges |
| IR @ VWM | <1 μA - Reverse leakage current at rated stand-off voltage; ensures minimal standby power loss |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments |
| RθJC | 10 °C/W - Junction-to-case thermal resistance; enables efficient heatsinking via PCB copper pour |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, single-diode configuration with cathode band marking. Matte tin-plated leads, J-STD-002 solderable, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail in unidirectional clamp configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12V/24V rail); conducts avalanche current during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock per AEC standard |
| ISO 7637-2 compliant | Withstands defined automotive transient waveforms (Pulse 1, 2a, 2b, 3a, 3b) without degradation |
| Glass passivated junction | Ensures stable VBR tolerance, low leakage, and long-term reliability under thermal stress |
| Fast response time | <1 ps rise time from 0 V to VBR min-limits voltage overshoot before clamping engages |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive for environmentally constrained applications |
Applications
| Automotive Power Rail Protection | Industrial DC Power Input |
|---|---|
Use Scenario: Protecting 24V battery-fed ECUs against load-dump transients (ISO 7637-2 Pulse 5a) and alternator-induced spikes. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between power rail and chassis ground to clamp surges before they reach downstream regulators and microcontrollers. Use Value: Limits rail voltage to ≤304V during 5.1A transients, preserving 36V-rated input stages and enabling robust 24V system design. | Use Scenario: Safeguarding programmable logic controllers (PLCs) and motor drives from inductive switching noise on 24–48V DC inputs. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected across input terminals to absorb repetitive 1500W surges without failure. Use Value: Maintains <1μA leakage at 170V, minimizing standby current draw while surviving >1000 surges per MIL-STD-883H Method 3015.8. |
| Telecom Line Interface | Renewable Energy Charge Controller |
Use Scenario: Shielding RS-485 transceivers and PoE-powered devices from lightning-induced surges on outdoor data lines. IC Role / Device Role / Timing Role: Primary-level unidirectional TVS on DC bias rail of isolated data interface, coordinated with secondary GDT or MOV stages. Use Value: Sub-1ps response ensures clamping initiates before transient energy couples into signal path, reducing bit error rate in noisy field deployments. | Use Scenario: Protecting solar charge controller MOSFET gates and sensing circuits from PV array voltage spikes during cloud-edge transients. IC Role / Device Role / Timing Role: Clamp device on high-side switch gate drive rail (170V-rated) to prevent gate oxide rupture during fast-rising PV open-circuit events. Use Value: 189–231V VBR range aligns with 150V nominal PV string voltages, providing margin for MPPT overvoltage conditions without premature conduction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170A | 600W rating, SMB package (smaller footprint), higher RθJA (85°C/W), same VWM/VBR range | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or sustained load-dump events | Select only if space-constrained and peak surge energy remains ≤600W |
| 1.5KE170A | Through-hole TO-204AA (DO-41), 1500W, but slower response (>1ns), no AEC-Q101 or ISO 7637-2 validation | Not qualified for automotive; requires manual assembly; lacks automotive environmental screening | Acceptable for cost-sensitive industrial AC/DC supplies where AEC-Q101 is not required |
Compared with SMBJ170A and 1.5KE170A, the SMCJ170CH provides superior automotive qualification, lower thermal resistance, and faster response-making it the only choice for AEC-compliant 24V systems requiring full ISO 7637-2 immunity and automated SMT assembly.
Availability
SMCJ170CH is available at Aetrix Electronics and suitable for automotive control units, industrial PLCs, telecom power interfaces, and renewable energy charge controllers requiring stable component supply across extended production lifecycles.
Supply support for SMCJ170CH 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 automotive-qualified components since 1979.
The SMCJ series was developed specifically for AEC-Q101-compliant transient suppression in harsh automotive and industrial environments-emphasizing high-power clamping, fast response, and robust packaging for automated SMT lines.
FAQ
What is the polarity configuration of the SMCJ170CH?
The SMCJ170CH is a unidirectional TVS diode, with anode and cathode terminals clearly marked by a cathode band on the DO-214AB package. It conducts in forward bias like a standard diode and clamps reverse transients above its breakdown voltage. This configuration is optimized for DC rail protection where polarity is fixed, unlike bidirectional variants (e.g., SMCJ170CAH) used in AC or floating-signal applications.
Does the SMCJ170CH meet AEC-Q101 requirements for automotive use?
Yes, the SMCJ170CH is explicitly AEC-Q101 qualified per the manufacturer's datasheet (Version A2102). It has undergone stress testing including temperature cycling, high-temperature operating life, and mechanical shock-all aligned with AEC-Q101 Rev D. This qualification confirms suitability for under-hood and body-control module applications where reliability under thermal and vibration stress is critical.
What is the maximum clamping voltage of the SMCJ170CH and how is it measured?
The SMCJ170CH has a maximum clamping voltage (VC) of 304 V, measured at 5.1 A peak impulse current using the standardized 10/1000 μs double-exponential surge waveform per ANSI/IEEE C62.35. This value represents the upper limit of voltage seen by downstream circuitry during worst-case transient events and is guaranteed across the full operating temperature range.
Can the SMCJ170CH be used in bidirectional signal lines?
No-the SMCJ170CH is unidirectional and must not be used on AC or bidirectional signal paths. For such applications, the bidirectional variant SMCJ170CAH is specified, with identical VWM and clamping performance in both directions. Using SMCJ170CH on a bidirectional line would result in forward conduction during half-cycles, causing malfunction or damage.
What is the thermal resistance profile of the SMCJ170CH and how does it impact PCB layout?
The SMCJ170CH has RθJC = 10°C/W and RθJA = 55°C/W. To maintain junction temperature below 150°C during 1500W pulses, designers must provide adequate copper area (≥100 mm² per pad) and thermal vias beneath the cathode/anode pads. The low RθJC enables effective heat transfer to internal ground planes, making it suitable for compact, high-density automotive PCBs.
SMCJ170CH 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:
- 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)
SMCJ170CH FAQ
1.How can I place an order for SMCJ170CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170CH 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 SMCJ170CH reliable?
The price and inventory of SMCJ170CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ170CH is usually 5 days.
3.What payment methods are accepted for SMCJ170CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170CH?
SMCJ170CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170CH 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 SMCJ170CH?
For technical support, including SMCJ170CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170CH requirements.
6.How does Aetrix verify that SMCJ170CH is sourced from the original manufacturer or authorized distributors?
All SMCJ170CH 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 SMCJ170CH meets industry standards.
7.What is the process for return or replacement of SMCJ170CH?
All SMCJ170CH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170CH, 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 SMCJ170CH part is unused and in its original packaging.
Return procedure for SMCJ170CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ170CH Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
