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Taiwan Semiconductor Corporation SMCJ17H
- Part No.:
- SMCJ17H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ17H.pdf
- Description:
- 1500W, 21V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:7,026
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Product details
Overview
SMCJ17H from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 17V working stand-off voltage (VWM), 18.9–23.1V breakdown voltage (VBR), and 30.5V maximum clamping voltage (VC) at 51A peak pulse current. It delivers AEC-Q101 qualification, ISO 7637-2 compliance, and sub-1ps response for automotive power line protection.
For engineers reviewing the SMCJ17H datasheet, SMCJ17H pinout, SMCJ17H application, or SMCJ17H equivalent, this page provides verified electrical parameters, thermal performance data, polarity marking guidance, and validated alternatives for ESD and load-switching surge suppression in 12V automotive subsystems.
Technical Context
The SMCJ17H uses a glass-passivated silicon junction optimized for fast transient response (<1.0ps rise to VBR) and low leakage (<1µA at 17V). Its unidirectional configuration enables asymmetric clamping-forward conduction limited to 3.5V at 100A-while maintaining bidirectional surge immunity per ISO 7637-2 Pulse 1/2a/2b/3a/3b waveforms.
Thermally, it features RθJA = 55°C/W and RθJC = 10°C/W, enabling sustained 5W steady-state dissipation at 25°C ambient. The DO-214AB case supports automated placement and meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 18.9–23.1 V @ 1 mA - Confirmed breakdown range ensuring reliable turn-on margin above VWM |
| VC @ IPPM | 30.5 V @ 51 A - Clamping voltage during 10/1000μs surge, limiting downstream voltage stress |
| PPK | 1500 W - Peak pulse power handling capability per single 1ms transient |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| IR @ VWM | <1 µA - Ultra-low reverse leakage preserving signal integrity in high-impedance circuits |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with cathode band marking and 0.210g mass |
Pinout & Package
DO-214AB (SMC) package with axial lead configuration: Cathode marked by a band on one end; anode at opposite end. Matte tin-plated leads comply with J-STD-002 solderability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Clamps positive transients to ground when reverse-biased; connects to protected line |
| Anode (unmarked end) | Reference node | Typically connected to system ground or low-impedance return path for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) test profiles |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives |
| Fast response time | <1.0 ps rise time ensures clamping activation before sensitive ICs experience overvoltage damage |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive for environmentally constrained applications |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12V supply rails in body control modules, lighting drivers, and infotainment head units from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input to clamp surges above 17V while passing normal 12–14V operation. Use Value: Limits clamped voltage to 30.5V, preventing damage to downstream 36V-rated regulators and microcontrollers. | Use Scenario: Safeguarding analog sensor inputs (e.g., pressure, temperature) in PLC I/O modules exposed to field-wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; SMCJ17H used unidirectionally across sensor supply and ground to absorb negative-going transients on VSUPPLY. Use Value: Sub-1µA leakage preserves millivolt-level sensor accuracy; 1500W rating handles 50A/10/1000μs surges common in factory floor wiring. |
| Telecom Power Input Protection | Consumer Power Adapter ESD Suppression |
Use Scenario: Front-end surge suppression on AC/DC adapter inputs feeding PoE-powered switches and base stations. IC Role / Device Role / Timing Role: Mounted at AC input rectifier output to clamp switching spikes and lightning-induced surges on 12–24V DC bus lines. Use Value: 30.5V clamping ensures downstream 30V-rated MOSFETs and controllers remain within safe operating area during 1kV/0.5Ω combo wave tests. | Use Scenario: Secondary-side protection in USB-C PD adapters where 17V intermediate rails feed buck converters. IC Role / Device Role / Timing Role: Placed across +17V rail and ground to suppress ESD events from hot-plug connectors and board-level static discharge. Use Value: 18.9–23.1V VBR ensures robust margin above 17V nominal, while DO-214AB footprint allows compact layout near connector entry points. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17A | 600W rating, SMB package (smaller footprint), lower VC = 27.6V @ 30A, same VWM/VBR range | Better suited for space-constrained consumer electronics; insufficient for ISO 7637-2 Pulse 1 (10/1000μs, 1500W) | Select SMCJ17H when automotive load-dump immunity or 1500W surge handling is required |
| 1.5KE17A | Through-hole TO-204AA (DO-41), 1500W, higher VF = 3.5V, larger thermal mass but no AEC-Q101 qualification | Acceptable for industrial fixed equipment; unsuitable for automated SMT assembly or automotive qualification requirements | Choose SMCJ17H for SMT production, AEC-Q101 compliance, and UL 94V-0 molded case |
Compared with SMBJ17A and 1.5KE17A, the SMCJ17H uniquely combines 1500W surge capability, AEC-Q101 qualification, DO-214AB SMT compatibility, and ISO 7637-2 compliance-making it the only option qualified for automotive 12V power rail protection requiring full load-dump immunity.
Availability
SMCJ17H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface design, and telecom DC input protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMCJ17H 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, and power devices since 1979.
The SMCJ series was developed specifically for automotive and industrial transient suppression, emphasizing AEC-Q101 reliability, ISO 7637-2 compliance, and high-power SMT packaging for under-hood and factory-floor environments.
FAQ
What is the clamping voltage of the SMCJ17H and how is it measured?
The SMCJ17H has a maximum clamping voltage (VC) of 30.5 V, measured at 51 A peak pulse current (IPPM) using a 10/1000 μs double-exponential surge waveform per Fig.5 in the datasheet. This value defines the upper voltage limit imposed on protected circuitry during a standardized transient event, ensuring downstream components remain within safe operating limits.
Is the SMCJ17H suitable for bidirectional transient protection?
No-the SMCJ17H is a unidirectional TVS diode intended for use across a DC supply rail and ground. For bidirectional protection, Taiwan Semiconductor offers the SMCJ17CH or SMCJ17CAH variants with CH/CAH suffixes; these share identical VWM, VBR, and VC ratings but operate symmetrically in both polarities.
Does the SMCJ17H meet automotive qualification standards?
Yes-the SMCJ17H is explicitly AEC-Q101 qualified and tested to meet ISO 7637-2 Pulse 1 (load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) requirements. Its DO-214AB package also satisfies JESD201 Class 2 whisker resistance and J-STD-020 moisture sensitivity level 1.
What is the forward voltage drop of the SMCJ17H and why does it matter?
The SMCJ17H exhibits a forward voltage (VF) of 3.5 V at 100 A, as specified for all SMCJ5.0H–SMCJ90H devices. This parameter matters during extreme forward conduction events (e.g., reverse-polarity connection), where VF determines power dissipation (P = VF × IF) and potential thermal stress on the device and PCB traces.
How does the SMCJ17H compare to the SMCJ17AH variant?
The SMCJ17AH has tighter breakdown voltage tolerance (18.9–20.9 V vs. 18.9–23.1 V for SMCJ17H), lower clamping voltage (27.6 V vs. 30.5 V), and identical VWM (17 V). Both share AEC-Q101 qualification and DO-214AB packaging, but SMCJ17AH is preferred where precise clamping threshold and reduced let-through voltage are critical.
SMCJ17H 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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.5V
- Current - Peak Pulse (10/1000µs):
- 51A
- 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)
SMCJ17H FAQ
1.How can I place an order for SMCJ17H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ17H 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 SMCJ17H reliable?
The price and inventory of SMCJ17H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ17H is usually 5 days.
3.What payment methods are accepted for SMCJ17H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ17H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ17H?
SMCJ17H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ17H 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 SMCJ17H?
For technical support, including SMCJ17H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ17H requirements.
6.How does Aetrix verify that SMCJ17H is sourced from the original manufacturer or authorized distributors?
All SMCJ17H 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 SMCJ17H meets industry standards.
7.What is the process for return or replacement of SMCJ17H?
All SMCJ17H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ17H, 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 SMCJ17H part is unused and in its original packaging.
Return procedure for SMCJ17H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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