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Vishay General Semiconductor - Diodes Division SMCJ17CAHE3/9AT
- Part No.:
- SMCJ17CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ17CAHE3/9AT.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,069
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Product details
Overview
SMCJ17CAHE3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on power and signal lines. 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 (PPPM) with 10/1000 μs waveform - deployed in automotive sensor protection and industrial I/O interfaces.
For engineers reviewing the SMCJ17CAHE3/9AT datasheet, SMCJ17CAHE3/9AT pinout, SMCJ17CAHE3/9AT application, or SMCJ17CAHE3/9AT equivalent, this part delivers AEC-Q101 qualification, bidirectional surge suppression, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for high-reliability automotive and industrial designs requiring robust ESD and lightning transient immunity.
Technical Context
The SMCJ17CAHE3/9AT operates as a bidirectional avalanche diode, symmetrically clamping both positive and negative transients without polarity dependence. Its breakdown voltage (VBR) ranges from 18.9 V to 20.9 V at 1.0 mA test current, with temperature coefficient of 0.090 %/°C - enabling stable clamping across -55 °C to +150 °C junction range.
It uses glass-passivated silicon junction technology for fast response (<1 ps), low leakage (<1.0 μA at VWM), and repeatable surge performance. The device meets UL 497B recognition (QVGQ2) and is rated for 200 A non-repetitive forward surge (IFSM) in unidirectional mode - though SMCJ17CAHE3/9AT is bidirectional and thus not rated for IFSM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 12 V nominal systems. |
| VBR min/max | 18.9 V / 20.9 V at 1.0 mA - ensures reliable avalanche initiation within tight tolerance for predictable transient response. |
| VC @ IPPM | 27.6 V at 54.3 A - clamping voltage under 10/1000 μs surge; protects downstream ICs with <30 V absolute max ratings. |
| PPPM | 1500 W - peak pulse power handling capability; supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge compliance. |
| TJ max | +150 °C - enables operation in under-hood automotive environments and thermally constrained industrial enclosures. |
| Package | SMC (DO-214AB) - surface-mount footprint with 8.0 mm × 8.0 mm copper pad thermal relief; supports automated placement and reflow. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per AEC standard. |
Pinout & Package
SMCJ17CAHE3/9AT is a bidirectional TVS diode in SMC (DO-214AB) package with no polarity marking; both terminals are electrically symmetrical and interchangeable. The case conforms to JEDEC DO-214AB outline with 0.320" length, 0.246" width, and 0.126" height (8.13 × 6.22 × 3.20 mm), featuring matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | No polarity - either terminal connects to protected line; clamps both polarities equally; no cathode band marking. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units, ADAS sensors, and body electronics. |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 4 kV surge events without degradation when mounted on recommended 8 mm × 8 mm copper pads. |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes overvoltage stress on protected devices - critical for 3.3 V/5 V logic and automotive CAN/LIN transceivers. |
| MSL Level 1 (260 °C peak) | Enables standard lead-free reflow without baking or special handling; compatible with high-volume SMT production. |
| Glass passivated junction | Ensures stable leakage (<1.0 μA), low capacitance (~100 pF at 0 V), and long-term reliability under thermal cycling. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine control modules from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor output and microcontroller ADC input. Use Value: Limits transient voltage to ≤27.6 V during 10/1000 μs surges, preventing ADC saturation and latch-up in 3.3 V–5 V systems. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-induced surges and relay contact bounce. IC Role / Device Role / Timing Role: Primary surge suppressor on DIN-rail-mounted I/O module front-end, upstream of optocoupler isolation. Use Value: Absorbs up to 1500 W transient energy while maintaining <1.0 μA leakage at 17 V - preserving input threshold accuracy. |
| Telecom Power Line Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding PoE-powered Ethernet switch ports against lightning-induced common-mode surges on 48 V DC supply rails. IC Role / Device Role / Timing Role: Bidirectional TVS on DC input side of DC/DC converter, coordinated with common-mode chokes. Use Value: Clamps differential surges to 27.6 V within <1 ps, meeting IEC 61000-4-5 Ed. 3 Class 3 requirements. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, blenders). IC Role / Device Role / Timing Role: Across-motor terminals to quench inductive kickback before it reaches MCU GPIO or motor driver IC. Use Value: Handles repetitive 54.3 A pulses without parameter drift; RoHS-compliant and halogen-free variant available (HE3 suffix). |
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 | Same VWM (17 V) and VC (27.6 V), but lower PPPM (1000 W); smaller SMA package (DO-214AC); higher RθJA (100 °C/W). | Lower power handling limits use to sub-1 kV surge environments; unsuitable for IEC 61000-4-5 Level 4. | Select SAC17CA only for space-constrained consumer designs where 1000 W surge rating suffices. |
| SMCJ17CAHM3/9AT | Identical electrical specs and AEC-Q101 qualification; differs only in halogen-free molding compound (HM3 vs HE3). | No functional difference; HM3 required for strict halogen-free compliance (e.g., EU medical equipment). | Choose SMCJ17CAHM3/9AT when halogen-free certification is mandated by end-product regulatory scope. |
Compared with SAC17CA, SMCJ17CAHE3/9AT provides 50 % higher surge power margin and superior thermal dissipation via SMC package; versus SMCJ17CAHM3/9AT, it offers identical protection performance with standard RoHS compliance - making it optimal for cost-sensitive automotive Tier 2 suppliers.
Availability
SMCJ17CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom power line surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCJ17CAHE3/9AT 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMCJ series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated.
FAQ
What is the clamping voltage of SMCJ17CAHE3/9AT at its rated peak pulse current?
The SMCJ17CAHE3/9AT has a maximum clamping voltage (VC) of 27.6 V at 54.3 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured with the device mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per JEDEC standards. The clamping behavior remains symmetrical in both directions due to its bidirectional construction, ensuring consistent protection for AC-coupled or floating signal lines.
Is SMCJ17CAHE3/9AT suitable for automotive applications?
Yes, SMCJ17CAHE3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility, and operation from -55 °C to +150 °C. The HE3 suffix confirms RoHS compliance and automotive qualification - verified in Vishay's official documentation (Doc. #88394, Rev. 09-Jan-2024).
Does SMCJ17CAHE3/9AT have polarity markings on the package?
No, SMCJ17CAHE3/9AT does not have polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., SMCJ17A), the CA version has symmetrical anode/cathode terminals with no cathode band. Both leads serve identically in circuit layout - simplifying PCB design and eliminating orientation errors during automated assembly.
What is the standoff voltage (VWM) and why is it important for SMCJ17CAHE3/9AT?
The standoff voltage (VWM) of SMCJ17CAHE3/9AT is 17 V - the maximum DC or RMS voltage the device can withstand continuously without entering avalanche conduction. This parameter ensures the TVS remains inactive during normal operation (e.g., on a 12 V automotive bus), avoiding power loss or interference. Exceeding VWM risks premature clamping; therefore, system designers select SMCJ17CAHE3/9AT for nominal 12 V circuits where 17 V provides adequate margin above worst-case rail variation.
How does the SMC (DO-214AB) package of SMCJ17CAHE3/9AT improve thermal performance compared to SMA?
The SMC (DO-214AB) package of SMCJ17CAHE3/9AT provides significantly better thermal dissipation than SMA (DO-214AC), with typical junction-to-lead thermal resistance (RθJL) of 15 °C/W versus ~30 °C/W for SMA. Its larger copper pad area (8.0 mm × 8.0 mm per terminal) lowers junction temperature rise during surge events, enabling sustained 1500 W pulse handling. This makes SMCJ17CAHE3/9AT suitable for high-reliability applications where thermal derating is critical - such as under-hood automotive modules.
SMCJ17CAHE3/9AT 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ17CAHE3/9AT FAQ
1.How can I place an order for SMCJ17CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ17CAHE3/9AT 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 SMCJ17CAHE3/9AT reliable?
The price and inventory of SMCJ17CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ17CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ17CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ17CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ17CAHE3/9AT?
SMCJ17CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ17CAHE3/9AT 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 SMCJ17CAHE3/9AT?
For technical support, including SMCJ17CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ17CAHE3/9AT requirements.
6.How does Aetrix verify that SMCJ17CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ17CAHE3/9AT 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 SMCJ17CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ17CAHE3/9AT?
All SMCJ17CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ17CAHE3/9AT, 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 SMCJ17CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ17CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ17CAHE3/9AT Tags
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