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Vishay General Semiconductor - Diodes Division SMCJ17CAHM3/H
- Part No.:
- SMCJ17CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ17CAHM3/H.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,319
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Product details
Overview
SMCJ17CAHM3/H 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/H datasheet, SMCJ17CAHM3/H pinout, SMCJ17CAHM3/H application, or SMCJ17CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and compatibility with 8.0 mm × 8.0 mm copper pad layouts per JEDEC standards.
Technical Context
This device operates as a voltage-clamped surge protector using an avalanche breakdown mechanism, with symmetrical reverse/forward conduction behavior due to its bidirectional construction. Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of ESD, lightning-induced transients, and inductive switching spikes.
The SMCJ17CAHM3/H is thermally rated for TJ = −55 °C to +150 °C, with RθJA = 75 °C/W and RθJL = 15 °C/W, and meets MSL Level 1 per J-STD-020 at 260 °C peak reflow temperature - confirming suitability for lead-free surface-mount assembly without moisture sensitivity concerns.
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 at IT = 1 mA - guaranteed breakdown threshold range for reliable turn-on margin |
| VC | 27.6 V at IPPM = 54.3 A - clamped voltage seen by protected circuit during 10/1000 µs surge |
| PPPM | 1500 W - peak transient power handling capacity under standardized surge waveform |
| IPPM | 54.3 A - maximum non-repetitive surge current the device can safely divert |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 8.13 mm footprint and 3.20 mm height |
Pinout & Package
SMCJ17CAHM3/H uses the standard SMC (DO-214AB) package: two-terminal, bidirectional device with no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (bidirectional) | Accepts surge current in either direction; connects to protected line or ground return path |
| Cathode | Transient current exit point (bidirectional) | Completes clamping path; ties to reference plane (e.g., chassis or signal ground) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Halogen-free & RoHS-compliant | Meets EU RoHS Directive 2011/65/EU and IEC 61249-2-21; no brominated flame retardants or chlorine |
| Low incremental surge resistance | Enables tighter clamping (VC − VBR = 8.7 V) and lower let-through energy during fast transients |
| MSL Level 1 rating | Zero floor life limitation; safe for reflow soldering at 260 °C peak without baking preconditioning |
| Glass passivated junction | Provides stable leakage performance (ID ≤ 1.0 µA at VWM) and long-term reliability under humidity bias stress |
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 clamping element placed between signal line and chassis ground to limit voltage excursions below IC absolute maximum ratings. Use Value: Maintains signal integrity during 12 V/24 V system transients while meeting AEC-Q101 requirements for under-hood deployment. | Use Scenario: Shielding digital input modules in programmable logic controllers from field-wiring induced surges (IEC 61000-4-5, 2 kV ring wave). IC Role / Device Role / Timing Role: Primary front-end TVS across isolated input terminals to shunt surge energy before optocoupler or level-shifter stages. Use Value: Enables >1500 W surge handling with <27.6 V clamping, preserving downstream isolation barrier integrity and reducing need for secondary protection. |
| Telecom Line Interface | Consumer Power Adapter ESD Protection |
Use Scenario: Safeguarding Ethernet PHY interface pins (e.g., RJ45 magnetics secondary side) against lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Bidirectional TVS mounted differential-to-ground to clamp mode-conversion transients without disrupting DC bias or signal swing. Use Value: Delivers symmetrical clamping (VC = 27.6 V both polarities) compatible with 100 Ω differential impedance and IEEE 802.3af PoE voltage margins. | Use Scenario: Protecting USB-C CC and VBUS lines in AC/DC adapters against human-body-model (HBM) ESD events per IEC 61000-4-2 Level 4 (±15 kV air). IC Role / Device Role / Timing Role: Fast-response transient suppressor placed directly at connector entry point to prevent latch-up in USB PD controllers. Use Value: Sub-1 ns response ensures clamping before ESD pulse edge reaches silicon, validated by AEC-Q101's human-body-model stress protocol. |
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) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a/b or IEC 61000-4-5 2 kV tests | Select when board space is constrained and surge threat level is limited to ESD or low-energy switching noise. |
| SMCJ17CA-E3/57T | Same electrical specs and SMC package, but commercial-grade (non-AEC-Q101), RoHS-compliant only (not halogen-free) | Not qualified for automotive use; lacks AEC-Q101 stress validation and may have higher parametric drift over lifetime | Choose for cost-sensitive industrial or consumer designs where automotive qualification is not required. |
Compared with SMCJ17CAHM3/H, SMAJ17CAHE3/A offers smaller size but reduced surge capacity and thermal robustness, while SMCJ17CA-E3/57T matches form/fit/function but omits AEC-Q101 validation and halogen-free compliance - making SMCJ17CAHM3/H the sole option meeting full automotive production requirements.
Availability
SMCJ17CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor systems, industrial PLC I/O modules, telecom line interfaces, and consumer power adapter designs requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMCJ17CAHM3/H 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, high-power, and automotive-qualified solutions.
The SMCJ series was developed specifically for demanding transient suppression in automotive, industrial, and telecom infrastructure applications - prioritizing high PPPM, tight VC/VBR ratios, and extended temperature operation up to +150 °C.
FAQ
What is the clamping voltage of the SMCJ17CAHM3/H under a 10/1000 µs surge?
The SMCJ17CAHM3/H has a maximum clamping voltage (VC) of 27.6 V at 54.3 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024, Document Number 88394. The clamping performance ensures protected circuits remain within safe voltage limits during high-energy transients.
Is the SMCJ17CAHM3/H suitable for automotive applications?
Yes, the SMCJ17CAHM3/H is AEC-Q101 qualified and explicitly designated for automotive use via its HM3 suffix (halogen-free, RoHS-compliant, and AEC-Q101 qualified). It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD per the AEC-Q101 standard, making it appropriate for under-hood and body-control module deployments where reliability is critical.
What does the "CA" suffix indicate in SMCJ17CAHM3/H?
The "CA" suffix in SMCJ17CAHM3/H denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both forward and reverse directions. Unlike unidirectional variants (e.g., SMCJ17A), this version has no polarity marking and delivers identical VBR, VC, and IPPM characteristics regardless of voltage polarity, ideal for AC-coupled or differential signal protection.
What is the thermal resistance of the SMCJ17CAHM3/H?
The SMCJ17CAHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and a junction-to-lead resistance (RθJL) of 15 °C/W, measured on the recommended 8.0 mm × 8.0 mm copper pad layout per JEDEC standards. These values confirm efficient heat dissipation during repetitive surge events and support sustained operation at TJ up to +150 °C.
How does the SMCJ17CAHM3/H differ from the SMCJ17A variant?
The SMCJ17CAHM3/H is bidirectional with symmetrical clamping, while the SMCJ17A is unidirectional and features a cathode band marking. Electrically, SMCJ17CAHM3/H has identical VWM (17 V) and VBR (18.9–20.9 V), but supports reverse conduction - making it suitable for AC or floating signal lines. Additionally, SMCJ17CAHM3/H carries AEC-Q101 qualification and halogen-free construction, unlike standard SMCJ17A variants.
SMCJ17CAHM3/H 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/H FAQ
1.How can I place an order for SMCJ17CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ17CAHM3/H 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/H reliable?
The price and inventory of SMCJ17CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ17CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMCJ17CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ17CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ17CAHM3/H?
SMCJ17CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ17CAHM3/H 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/H?
For technical support, including SMCJ17CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ17CAHM3/H requirements.
6.How does Aetrix verify that SMCJ17CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMCJ17CAHM3/H 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/H meets industry standards.
7.What is the process for return or replacement of SMCJ17CAHM3/H?
All SMCJ17CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ17CAHM3/H, 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/H part is unused and in its original packaging.
Return procedure for SMCJ17CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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