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Vishay General Semiconductor - Diodes Division SMCJ17CAHM3/I
- Part No.:
- SMCJ17CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ17CAHM3/I.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,930
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Product details
Overview
SMCJ17CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 17 V standoff voltage (VWM), 27.6 V maximum clamping voltage (VC) at 54.3 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 μs waveform), commonly deployed on automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the SMCJ17CAHM3/I datasheet, SMCJ17CAHM3/I pinout, SMCJ17CAHM3/I application, or SMCJ17CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and thermal resistance (RθJA = 75 °C/W) under standard PCB pad layout.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical breakdown behavior in both polarities due to its bidirectional construction. Its glass-passivated junction ensures stable VBR (18.9–20.9 V at 1 mA) and low incremental surge resistance, enabling fast response (<1 ps) to ESD and lightning-induced transients.
Designed for surface-mount automated assembly, it meets J-STD-020 MSL Level 1 and JESD 201 Class 2 whisker resistance. The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101 qualified construction-critical for automotive-grade reliability in harsh thermal and vibration environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 18.9 V / 20.9 V at 1 mA - Ensures reliable triggering above system operating voltage with margin |
| VC @ IPPM | 27.6 V at 54.3 A - Clamped voltage seen by protected IC during 10/1000 μs surge |
| PPPM | 1500 W - Peak surge energy handling capacity under standardized transient waveform |
| IPPM | 54.3 A - Maximum non-repetitive surge current the device safely clamps without failure |
| TJ max | +150 °C - Junction temperature limit supporting operation in under-hood automotive environments |
| RθJA | 75 °C/W - Thermal resistance from junction to ambient on standard 8 mm × 8 mm copper pads |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry (negative polarity) | One terminal of symmetrical PN junction; accepts transient current in either direction |
| Cathode | Surge current entry (positive polarity) | Second terminal of symmetrical PN junction; completes bidirectional conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment I/O |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental regulations and supports lead-free reflow soldering (260 °C peak) |
| Low RθJA (75 °C/W) | Allows sustained operation at elevated ambient temperatures with minimal derating on standard PCB layout |
| Fast response time | Sub-nanosecond clamping prevents voltage overshoot from damaging downstream CMOS inputs |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector interface to shunt surge energy before reaching signal conditioning circuitry. Use Value: Clamps transients to ≤27.6 V while sustaining 1500 W surges-preserving signal integrity and preventing latch-up in 3.3 V/5 V microcontrollers. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Parallel-connected TVS on each isolated input channel to clamp induced spikes up to 1 kV/10/1000 μs. Use Value: Withstands repeated 54.3 A surges without degradation, ensuring long-term reliability in factory automation environments. |
| Telecom Line Interface | Consumer Power Adapter ESD Protection |
Use Scenario: Shielding Ethernet PHY front-end and PoE-powered device interfaces against lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: First-stage protector on RJ45 magnetics secondary side, coordinated with GDT or polymer PTC. Use Value: 27.6 V clamping voltage aligns with Ethernet PHY absolute maximum ratings, preventing damage during 4 kV surge events. | Use Scenario: Adding secondary-side surge immunity to USB-C and barrel-jack power inputs in smart home hubs and audio devices. IC Role / Device Role / Timing Role: Low-capacitance TVS across VIN and GND to absorb ESD (IEC 61000-4-2 ±8 kV contact) without affecting regulation loop stability. Use Value: Halogen-free HM3 construction supports eco-label certifications (e.g., Energy Star, EPEAT) without compromising surge performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17CAHE3/A | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Suitable for space-constrained consumer PCBs where surge energy is lower | Select when board area is critical and peak surge exposure is ≤400 W |
| 1.5KE17CA | Through-hole DO-201 package, same VWM/VC, but larger size and manual assembly requirement | Used in legacy industrial power supplies where reworkability and mechanical robustness are prioritized | Choose for through-hole designs requiring field serviceability or higher mechanical retention |
Compared with SMAJ17CAHE3/A and 1.5KE17CA, the SMCJ17CAHM3/I delivers 3.75× higher surge power handling in an AEC-Q101 qualified, halogen-free SMC package-making it optimal for next-generation automotive and industrial SMPS input stages where reliability and power density are co-prioritized.
Availability
SMCJ17CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter designs requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ17CAHM3/I 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on high-reliability and automotive-grade solutions.
The SMCJ series is engineered specifically for high-energy transient suppression in demanding environments-targeting automotive, industrial, and telecom applications where robustness, consistency, and qualification compliance are mandatory.
FAQ
What does the "CA" suffix indicate in SMCJ17CAHM3/I?
The "CA" suffix denotes a bidirectional configuration, meaning the SMCJ17CAHM3/I provides symmetrical clamping in both polarities-ideal for protecting AC-coupled signals, differential buses, or floating nodes where voltage transients may occur with either polarity. This differs from unidirectional variants (e.g., SMCJ17A) that only clamp in reverse bias.
Is SMCJ17CAHM3/I qualified for automotive use?
Yes, the SMCJ17CAHM3/I carries the HM3 suffix, confirming it is halogen-free, RoHS-compliant, and AEC-Q101 qualified-meeting stress test requirements for temperature cycling, humidity, mechanical shock, and lifetime reliability in automotive electronic control units, body electronics, and ADAS subsystems.
What is the maximum clamping voltage of SMCJ17CAHM3/I and under what condition?
The SMCJ17CAHM3/I has a maximum clamping voltage (VC) of 27.6 V, measured at its rated peak pulse current (IPPM) of 54.3 A using the standardized 10/1000 μs double-exponential surge waveform-ensuring protected circuits remain below critical voltage thresholds during worst-case transients.
How does the SMCJ17CAHM3/I package differ from SMAJ or SMBJ series?
The SMCJ17CAHM3/I uses the SMC (DO-214AB) package-larger than SMA (DO-214AC) and SMB (DO-214AA), offering higher power dissipation (1500 W vs. 400 W for SMAJ, 600 W for SMBJ) and lower thermal resistance (75 °C/W vs. 110 °C/W for SMAJ), making it suitable for high-energy surge environments where robustness outweighs footprint constraints.
Can SMCJ17CAHM3/I be used in place of a unidirectional TVS like SMCJ17A?
No-SMCJ17CAHM3/I is strictly bidirectional and lacks cathode marking; substituting it for a unidirectional part like SMCJ17A would compromise forward-bias operation in DC-coupled circuits. Use only where bidirectional clamping is required, such as across differential pairs or AC signal paths-not in series with DC power rails.
SMCJ17CAHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 54.3A
- 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)
SMCJ17CAHM3/I FAQ
1.How can I place an order for SMCJ17CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ17CAHM3/I 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 SMCJ17CAHM3/I reliable?
The price and inventory of SMCJ17CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ17CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMCJ17CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ17CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ17CAHM3/I?
SMCJ17CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ17CAHM3/I 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 SMCJ17CAHM3/I?
For technical support, including SMCJ17CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ17CAHM3/I requirements.
6.How does Aetrix verify that SMCJ17CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMCJ17CAHM3/I 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 SMCJ17CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMCJ17CAHM3/I?
All SMCJ17CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ17CAHM3/I, 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 SMCJ17CAHM3/I part is unused and in its original packaging.
Return procedure for SMCJ17CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ17CAHM3/I Tags
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