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Taiwan Semiconductor Corporation SMDJ17CAH
- Part No.:
- SMDJ17CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ17CAH.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,832
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Product details
Overview
SMDJ17CAH from Taiwan Semiconductor is a bidirectional 3000W surface-mount 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 108.7A peak pulse current - designed for automotive-grade ESD and load-switching surge protection in power rails and I/O lines.
For engineers reviewing the SMDJ17CAH datasheet, SMDJ17CAH pinout, SMDJ17CAH application, or SMDJ17CAH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1ps response time, and DO-214AB thermal performance (RθJA = 75°C/W).
Technical Context
The SMDJ17CAH employs a glass-passivated silicon junction to achieve fast transient response (<1.0 ps) and stable clamping under repetitive surge events. Its bidirectional configuration enables symmetrical protection on AC-coupled or floating signal paths without polarity dependency.
Designed for automotive and industrial environments, it operates across –55°C to +175°C junction temperature range, supports 300A non-repetitive forward surge (IFSM), and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 18.9 V / 20.9 V - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 27.6 V - Clamped voltage at 108.7 A peak pulse, limiting downstream stress during transients |
| PPK | 3000 W - Peak pulse power handling per 10/1000 µs waveform, enabling robust surge immunity |
| TJ max | +175 °C - Maximum junction temperature, supporting under-hood and high-ambient industrial use |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance, guiding PCB copper area and heatsinking needs |
| Configuration | Bidirectional - Symmetric clamping in both polarities, suitable for AC signals and ungrounded buses |
Pinout & Package
DO-214AB (SMC) surface-mount package with matte tin-plated leads; polarity indicated by cathode band (not functional in bidirectional SMDJ17CAH).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (marked band) | Transient current path terminal | Non-polarized terminals - either lead serves as input/output for bidirectional clamping; no functional anode/cathode distinction |
| Case | Thermal and mechanical interface | Exposed metal slug provides primary heat dissipation path to PCB; requires thermal pad connection per JEDEC MO-214 |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, UHAST, and ESD |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupled noise) |
| Sub-1 ps response time | Enables clamping before sensitive ICs experience overvoltage damage during ESD or lightning-induced surges |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained applications |
| J-STD-020 Level 1 | Zero bake requirement prior to reflow; compatible with standard Pb-free solder profiles up to 260°C peak |
Applications
| Automotive Power Distribution | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs from load-dump transients and alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power rail upstream of DC-DC converters and microcontrollers. Use Value: Limits voltage to ≤27.6 V during 3000 W pulses, preventing latch-up or gate oxide rupture in downstream silicon. | Use Scenario: Shielding 4–20 mA current-loop transmitters from field wiring surges in factory automation. IC Role / Device Role / Timing Role: Bidirectional shunt protector across loop terminals to absorb induced common-mode transients. Use Value: Maintains loop integrity during ISO 7637-2 Pulse 3b events without polarity reversal or signal disruption. |
| Telecom Line Card Protection | Consumer USB-C Port ESD |
Use Scenario: Guarding Ethernet PHY interfaces against lightning-induced surges on PoE-enabled ports. IC Role / Device Role / Timing Role: Secondary-level TVS placed after gas discharge tube (GDT) to handle residual fast-rising energy. Use Value: Clamps sub-100 ns transients to <27.6 V while surviving repeated 10/1000 µs surges per ITU-T K.21. | Use Scenario: ESD protection for reversible USB-C connector VBUS and CC lines in portable devices. IC Role / Device Role / Timing Role: Bidirectional clamping element meeting IEC 61000-4-2 ±15 kV contact discharge requirement. Use Value: Provides <1 ps response and <27.6 V clamping to prevent damage to USB PD controllers and port switches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC17CA | Lower PPK (1500 W), higher VC (30.0 V), same VWM (17 V), DO-214AA (SMB) package | Reduced surge margin; suited for lower-energy consumer applications, not automotive load-dump | Select when space-constrained layouts require smaller SMB footprint and 1500 W rating suffices |
| SMLJ17CA | Same PPK (3000 W), identical VWM/VBR/VC specs, DO-214AB (SMC) package, AEC-Q101 qualified | No functional difference; alternate manufacturer (Littelfuse) with identical electrical and mechanical specs | Drop-in alternative with validated supply chain diversity; same thermal and layout requirements as SMDJ17CAH |
Compared with SAC17CA, SMDJ17CAH delivers 100% higher surge power headroom and lower clamping voltage - critical for automotive ISO 7637-2 compliance. Against SMLJ17CA, it offers identical protection performance but distinct manufacturing traceability and qualification documentation from Taiwan Semiconductor.
Availability
SMDJ17CAH is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom line card protection, and consumer USB-C port ESD requiring stable component supply across production lifecycles.
Supply support for SMDJ17CAH 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and computing markets.
The SMDJ series is engineered specifically for high-reliability transient suppression in harsh environments - emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust thermal performance in surface-mount packages.
FAQ
What does the 'CAH' suffix indicate in SMDJ17CAH?
The 'CAH' suffix denotes a bidirectional configuration - meaning the SMDJ17CAH provides symmetrical clamping in both polarities, unlike the unidirectional 'AH' variant. This makes SMDJ17CAH suitable for AC-coupled circuits, floating buses, and applications where voltage polarity cannot be guaranteed. The device has no functional anode or cathode marking; the band is retained for mechanical consistency only.
Is SMDJ17CAH qualified for automotive applications?
Yes, SMDJ17CAH is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b standards - confirming its suitability for 12V automotive power networks. It operates from –55°C to +175°C and passes JESD201 Class 2 whisker testing, fulfilling critical reliability requirements for engine control units, body electronics, and ADAS modules.
What is the maximum clamping voltage of SMDJ17CAH and at what current?
The maximum clamping voltage (VC) of SMDJ17CAH is 27.6 V, measured at the peak pulse current (IPPM) of 108.7 A under the standardized 10/1000 µs waveform. This value ensures downstream components see no more than 27.6 V during worst-case surge events, directly supporting design margins for 3.3 V, 5 V, and 12 V logic and power stages.
Can SMDJ17CAH replace unidirectional SMDJ17AH in existing designs?
No - SMDJ17CAH is bidirectional and lacks polarity-dependent functionality, so it cannot substitute for unidirectional SMDJ17AH in circuits relying on forward conduction (e.g., DC power rail clamping with defined anode/cathode orientation). Layout changes and functional validation are required; the two variants serve fundamentally different circuit roles despite shared voltage ratings.
What is the thermal resistance and how does it affect PCB layout for SMDJ17CAH?
SMDJ17CAH has a junction-to-ambient thermal resistance (RθJA) of 75°C/W and junction-to-lead (RθJL) of 15°C/W. To maintain TJ ≤175°C under 3000 W pulses, the PCB must provide adequate copper area (≥100 mm² thermal pad per lead) and minimize trace length to ground planes. Thermal vias under the slug are strongly recommended to enhance heat transfer to inner layers.
SMDJ17CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMDJ
- 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):
- 108.7A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMDJ17CAH FAQ
1.How can I place an order for SMDJ17CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ17CAH 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 SMDJ17CAH reliable?
The price and inventory of SMDJ17CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ17CAH is usually 5 days.
3.What payment methods are accepted for SMDJ17CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ17CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ17CAH?
SMDJ17CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ17CAH 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 SMDJ17CAH?
For technical support, including SMDJ17CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ17CAH requirements.
6.How does Aetrix verify that SMDJ17CAH is sourced from the original manufacturer or authorized distributors?
All SMDJ17CAH 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 SMDJ17CAH meets industry standards.
7.What is the process for return or replacement of SMDJ17CAH?
All SMDJ17CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ17CAH, 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 SMDJ17CAH part is unused and in its original packaging.
Return procedure for SMDJ17CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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