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Taiwan Semiconductor Corporation SMCJ17CAH
- Part No.:
- SMCJ17CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ17CAH.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,111
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Product details
Overview
SMCJ17CAH from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 17V working stand-off voltage (VWM), 18.9–20.9V breakdown voltage (VBR), and 27.6V maximum clamping voltage (VC) at 57A peak pulse current. It meets AEC-Q101 qualification and ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and ESD protection.
For engineers reviewing the SMCJ17CAH datasheet, SMCJ17CAH pinout, SMCJ17CAH application, or SMCJ17CAH equivalent, this device is selected for high-energy transient suppression in 12V automotive power rails, industrial I/O interfaces, and telecom DC power inputs where sub-1ps response time, <1µA leakage above 10V, and bidirectional clamping are required.
Technical Context
The SMCJ17CAH is a glass-passivated, single-die, bidirectional TVS diode designed to clamp fast transients without degradation under repeated surge events. Its junction-to-case thermal resistance of 10°C/W enables reliable power dissipation during 1ms 1500W pulses, while its JESD201 Class 2 whisker-resistant matte tin leads support automated SMT assembly.
It operates across –55°C to +150°C junction temperature range and complies with RoHS and halogen-free standards per IEC 61249-2-21. Polarity is marked by cathode band - irrelevant for bidirectional operation but critical for correct PCB layout referencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse voltage before clamping begins; sets operating margin for 12V automotive systems. |
| VBR min/max | 18.9 / 20.9 V @ IT = 1 mA - Confirmed breakdown threshold ensures predictable turn-on during transients. |
| VC @ IPPM | 27.6 V @ 57 A - Clamping voltage limits downstream IC stress during ISO 7637-2 Pulse 1 (inductive load dump). |
| PPK | 1500 W - Peak pulse power rating defines energy-handling capability for 1ms 10/1000µs waveform. |
| IR @ VWM | <1 µA - Ultra-low leakage preserves battery life and signal integrity in always-on circuits. |
| TJ max | +150 °C - Enables use in under-hood automotive environments without derating penalties. |
| Response time | <1.0 ps - Ensures clamping activation before ESD or lightning-induced transients damage sensitive inputs. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration with cathode band marking (non-functional for bidirectional operation but retained for manufacturing consistency).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (marked end) | Transient return path (bidirectional) | Connects to protected line; identical electrical behavior as cathode due to symmetrical structure. |
| Cathode (band-marked end) | Transient return path (bidirectional) | Same function as anode; marking aids orientation during placement but does not define polarity in CAH devices. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| ISO 7637-2 compliance | Guarantees robustness against real-world automotive transients: Pulse 1 (inductive switch-off), Pulse 2a/2b (load dump), and Pulse 3a/3b (capacitive coupling). |
| Glass passivated junction | Provides stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments. |
| Moisture sensitivity level 1 | Eliminates bake requirements prior to reflow, reducing manufacturing cost and process complexity. |
| Halogen-free construction | Meets IEC 61249-2-21, supporting environmental compliance and safer thermal decomposition during failure. |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital I/O |
|---|---|
Use Scenario: Protecting 12V supply lines in body control modules from load-dump transients up to 35V and ISO 7637-2 Pulse 2b. IC Role / Device Role / Timing Role: Bidirectional clamping device placed between power rail and ground, responding within <1ps to limit voltage excursion. Use Value: Prevents latch-up or permanent damage to MCU, CAN transceivers, and power management ICs during alternator field-circuit interruption. | Use Scenario: Shielding 24V digital input channels in programmable logic controllers from inductive kickback and ESD events. IC Role / Device Role / Timing Role: Standoff voltage (17V) matches nominal 24V system margin; clamps surges to ≤27.6V before downstream optocoupler or Schmitt trigger thresholds are exceeded. Use Value: Eliminates need for external series impedance or RC filtering, simplifying input stage design while maintaining IEC 61000-4-2/4-4 immunity. |
| Telecom DC Power Input | Consumer USB-C Power Delivery Port |
Use Scenario: Safeguarding primary-side DC-DC converters in PoE-powered network switches against lightning-induced surges on 48V input lines. IC Role / Device Role / Timing Role: Front-end transient suppressor placed upstream of input filter capacitors and active rectifiers. Use Value: Withstands 1500W peak pulses without degradation, enabling single-stage protection architecture compliant with IEC 61000-4-5 Level 4 (4kV line-earth). | Use Scenario: Secondary-side overvoltage protection on USB-C PD CC lines and VCONN paths exposed to hot-plug transients and cable ESD. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp (CJ ≈ 200–300 pF typical) preserving signal integrity at 3A/5A PD signaling rates. Use Value: Sub-1µA leakage avoids false detection during low-power UFP/SOP enumeration; 27.6V VC prevents damage to USB PD controller GPIOs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17CA | 600W PPK rating, same VWM/VBR/VC specs, SMB package (smaller footprint, higher RθJA = 75°C/W) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 2b or 3b in automotive ECUs | Select when board space is constrained and peak surge energy remains below 600W. |
| 1.5KE17CA | Through-hole TO-204AA (DO-41), 1500W PPK, same VWM/VBR/VC, slower response (~1ns) | Not suitable for high-density SMT layouts; incompatible with automated pick-and-place for DO-214AB footprints | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMBJ17CA and 1.5KE17CA, the SMCJ17CAH delivers identical clamping performance in a surface-mount DO-214AB package with superior thermal dissipation (RθJC = 10°C/W) and automotive-qualified reliability - making it the optimal choice for production-grade 12V/24V embedded systems requiring AEC-Q101 and ISO 7637-2 compliance.
Availability
SMCJ17CAH is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, telecom power supplies, and consumer USB-C PD systems requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCJ17CAH 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 components.
The SMCJ series was developed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust glass-passivated junction technology.
FAQ
What is the clamping voltage of SMCJ17CAH at its rated peak pulse current?
The SMCJ17CAH has a maximum clamping voltage (VC) of 27.6 V at 57 A peak impulse current (IPPM), measured using the standard 10/1000 µs waveform per IEC 61000-4-5. This value is confirmed in the Electrical Specifications table on page 3 of the Taiwan Semiconductor datasheet revision A2102 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Is SMCJ17CAH unidirectional or bidirectional, and how is polarity marked?
The SMCJ17CAH is a bidirectional TVS diode - its "CAH" suffix explicitly denotes bipolar configuration, meaning it provides symmetrical clamping in both forward and reverse directions. Although it retains a cathode band marking per DO-214AB mechanical standard, this marking has no functional polarity significance for the SMCJ17CAH and is retained solely for manufacturing consistency with unidirectional variants like SMCJ17H.
Does SMCJ17CAH meet automotive qualification standards?
Yes, the SMCJ17CAH is AEC-Q101 qualified and tested per the full stress test schedule including HTGB, H3TRB, TC, AC/DC life test, and ESD (HBM/MM). It also meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements, making it suitable for front-end protection in automotive ECUs, body control modules, and infotainment power supplies.
What is the maximum steady-state power dissipation (PD) for SMCJ17CAH?
The SMCJ17CAH has a steady-state power dissipation (PD) rating of 5 W at TA = 25°C, as specified in the Absolute Maximum Ratings table. This value applies only to continuous DC or low-frequency reverse-bias conditions - transient suppression relies on the 1500W peak pulse rating (PPK), not PD, and thermal design must prioritize junction-to-ambient (RθJA = 55°C/W) and junction-to-case (RθJC = 10°C/W) paths for pulsed operation.
How does SMCJ17CAH differ from SMCJ17AH?
The SMCJ17CAH and SMCJ17AH are distinct parts: SMCJ17CAH is bidirectional (CAH suffix), while SMCJ17AH is unidirectional (AH suffix). Their VBR ranges differ - SMCJ17CAH: 18.9–20.9 V, SMCJ17AH: 18.9–20.9 V (same min/max) but with different test current (1 mA vs 10 mA) and clamping behavior only in reverse direction. Using SMCJ17AH in a bidirectional application would leave one polarity unprotected.
SMCJ17CAH 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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 57A
- 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)
SMCJ17CAH FAQ
1.How can I place an order for SMCJ17CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ17CAH 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 SMCJ17CAH reliable?
The price and inventory of SMCJ17CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ17CAH is usually 5 days.
3.What payment methods are accepted for SMCJ17CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ17CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ17CAH?
SMCJ17CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ17CAH 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 SMCJ17CAH?
For technical support, including SMCJ17CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ17CAH requirements.
6.How does Aetrix verify that SMCJ17CAH is sourced from the original manufacturer or authorized distributors?
All SMCJ17CAH 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 SMCJ17CAH meets industry standards.
7.What is the process for return or replacement of SMCJ17CAH?
All SMCJ17CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ17CAH, 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 SMCJ17CAH part is unused and in its original packaging.
Return procedure for SMCJ17CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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