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Vishay General Semiconductor - Diodes Division SMCJ17AHM3/I
- Part No.:
- SMCJ17AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ17AHM3/I.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,223
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Product details
Overview
SMCJ17AHM3/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 17 V standoff voltage (VWM), 18.9–20.9 V breakdown voltage (VBR at 1 mA), 27.6 V clamping voltage (VC) at 54.3 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform.
For engineers reviewing the SMCJ17AHM3/I datasheet, SMCJ17AHM3/I pinout, SMCJ17AHM3/I application, or SMCJ17AHM3/I equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant construction (HM3 suffix), low incremental surge resistance, and suitability for automotive power line and sensor interface protection where fast response (<1 ns), high surge immunity, and stable clamping under repetitive transients are required.
Technical Context
The SMCJ17AHM3/I operates as a silicon avalanche diode, leveraging glass-passivated junction technology to deliver precise, repeatable clamping behavior during ESD, lightning-induced surges, and inductive switching transients. Its unidirectional polarity enables integration into DC-biased circuits without reverse conduction concerns, and it meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow compatibility.
Designed for surface-mount automated placement, the device uses matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, with thermal resistance RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), enabling reliable operation up to TJ = +150 °C in compact PCB layouts with minimal copper pad area (0.31" × 0.31").
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC bias margin for protected circuitry. |
| VBR (Breakdown Voltage) | 18.9–20.9 V at IT = 1 mA - Avalanche onset threshold; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 27.6 V at IPPM = 54.3 A (10/1000 µs) - Peak voltage seen by downstream ICs during worst-case surge; limits stress on sensitive components. |
| PPPM (Peak Pulse Power) | 1500 W - Sustains high-energy transients without failure; supports IEC 61000-4-5 Level 4 compliance when properly laid out. |
| TJ max. | +150 °C - Enables use in under-hood automotive environments and industrial enclosures without derating penalties. |
| Package | SMC (DO-214AB) - Industry-standard 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with standard SMT pick-and-place and reflow profiles. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads. Cathode indicated by band marking on body; anode is unmarked end. Meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line (e.g., +12 V rail); conducts surge current to ground during overvoltage event. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop with minimal inductance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance-enables use in ADAS, body control, and infotainment modules. |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental regulations and eliminates brominated flame retardants; supports sustainable manufacturing and end-of-life recycling requirements. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving protection margin for 3.3 V/5 V logic interfaces. |
| Very fast response time (<1 ns) | Clamps before transient energy couples into downstream ICs; critical for safeguarding CAN transceivers, microcontrollers, and sensor front-ends. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground, clamping surges above 17 V while remaining inert during normal operation. Use Value: Limits peak voltage to 27.6 V during 54.3 A transients, preventing damage to LDOs, MCU power supplies, and CAN PHYs without adding series impedance. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at connector entry point, shunting fast transients before they reach op-amp inputs or ADC front-ends. Use Value: Sub-1 ns response ensures clamping occurs before transient propagates into signal chain; VC ≤ 27.6 V preserves signal integrity for 0–5 V ratiometric sensors. |
| Consumer USB Power Port Protection | Telecom DC Feeder Line Protection |
Use Scenario: Safeguarding USB-C PD power delivery circuits from hot-swap surges and external ESD coupling. IC Role / Device Role / Timing Role: Unidirectional TVS on VBUS line, rated for 17 V standoff to accommodate 9–20 V PD profiles while clamping to 27.6 V. Use Value: 1500 W PPPM handles multiple contact-discharge ESD events (IEC 61000-4-2 ±15 kV) without degradation; HM3 suffix ensures compatibility with lead-free assembly. | Use Scenario: Protecting PoE-powered equipment (e.g., IP cameras, wireless APs) from induced surges on 48 V DC feeder lines. IC Role / Device Role / Timing Role: Primary clamping device on DC input rail, coordinated with upstream GDT or MOV for multi-stage protection architecture. Use Value: Stable VBR tolerance (±5.5%) and low temperature coefficient (0.090 %/°C) ensure consistent clamping across -40 to +125 °C ambient range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17AHE3/A | Lower PPPM (400 W), smaller SMA package (DO-214AC), same VWM/VBR range | Not suitable for high-energy surges (e.g., load dump); limited to low-power signal lines or secondary protection stages | Select when board space is constrained and surge threat level is IEC 61000-4-2 only-not for ISO 7637-2 or lightning-induced events. |
| SMCJ17AHE3/I | Same electrical specs and SMC package, but commercial-grade (HE3) without AEC-Q101 qualification or halogen-free construction | Lacks automotive reliability validation; not approved for safety-critical vehicle subsystems | Choose for cost-sensitive industrial or consumer designs where AEC-Q101 is not mandated and RoHS compliance suffices. |
Compared with SMCJ17AHM3/I, SMAJ17AHE3/A offers reduced surge handling in a smaller footprint, while SMCJ17AHE3/I provides identical clamping performance without automotive qualification-making SMCJ17AHM3/I the sole choice when both 1500 W capability and AEC-Q101/halogen-free compliance are mandatory.
Availability
SMCJ17AHM3/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom power supply designs requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.
Supply support for SMCJ17AHM3/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments-including automotive, industrial, and telecommunications infrastructure-where consistent clamping, low leakage, and long-term stability are critical.
FAQ
What is the clamping voltage of the SMCJ17AHM3/I under maximum rated surge current?
The SMCJ17AHM3/I has a maximum clamping voltage (VC) of 27.6 V when subjected to its rated peak pulse current of 54.3 A using the standardized 10/1000 µs waveform. This value is measured at TA = 25 °C with specified mounting conditions (0.31" × 0.31" copper pads), and represents the upper voltage limit imposed on protected circuitry during worst-case transient events. The SMCJ17AHM3/I maintains this clamping performance across its full operating temperature range due to its low VBR temperature coefficient of 0.090 %/°C.
Is the SMCJ17AHM3/I suitable for automotive applications?
Yes, the SMCJ17AHM3/I is explicitly qualified to AEC-Q101 standards, making it suitable for automotive applications including engine control units, body electronics, ADAS sensors, and infotainment systems. Its halogen-free (HM3) construction, MSL Level 1 moisture sensitivity rating, and guaranteed operation from -55 °C to +150 °C junction temperature align with automotive reliability requirements. The SMCJ17AHM3/I is designated for automotive use via its "HM3" suffix and documented AEC-Q101 qualification in Vishay's official datasheet (Document Number: 88394, Revision: 09-Jan-2024).
How does the SMCJ17AHM3/I differ from the SMCJ17AHE3/I variant?
The SMCJ17AHM3/I and SMCJ17AHE3/I share identical electrical specifications-including VWM = 17 V, VBR = 18.9–20.9 V, VC = 27.6 V, and PPPM = 1500 W-and both use the SMC (DO-214AB) package. The key difference lies in qualification and material content: SMCJ17AHM3/I is halogen-free and AEC-Q101 qualified, whereas SMCJ17AHE3/I is RoHS-compliant but commercial-grade only. Therefore, SMCJ17AHM3/I is required for automotive deployments, while SMCJ17AHE3/I serves cost-sensitive industrial or consumer applications.
What is the thermal resistance of the SMCJ17AHM3/I, and how does it affect PCB layout?
The SMCJ17AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W, measured on standard 0.31" × 0.31" copper pads. These values indicate that effective heat dissipation relies heavily on adequate copper area and thermal vias. For continuous power dissipation near its 6.5 W rating, designers must provide ≥ 1 cm² of 2-oz copper per terminal with ≥ 4 thermal vias (0.3 mm diameter) to maintain TJ < 125 °C. The SMCJ17AHM3/I's low RθJL also supports efficient conduction through leads into internal ground planes.
Does the SMCJ17AHM3/I have polarity markings, and how is it oriented on the PCB?
Yes, the SMCJ17AHM3/I is unidirectional and features a cathode band marking on the body-visible as a white or black stripe near one end-which identifies the cathode terminal. During PCB layout, the banded end must be connected to the line being protected (e.g., +12 V rail), while the unbanded (anode) end connects to ground or the reference plane. Incorrect orientation will prevent clamping action and may result in catastrophic failure under reverse bias. The SMCJ17AHM3/I's polarity is confirmed in Vishay's mechanical drawings and electrical test conditions, where VBR and VC are defined with cathode positive relative to anode.
SMCJ17AHM3/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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCJ17AHM3/I FAQ
1.How can I place an order for SMCJ17AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ17AHM3/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 SMCJ17AHM3/I reliable?
The price and inventory of SMCJ17AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ17AHM3/I is usually 5 days.
3.What payment methods are accepted for SMCJ17AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ17AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ17AHM3/I?
SMCJ17AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ17AHM3/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 SMCJ17AHM3/I?
For technical support, including SMCJ17AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ17AHM3/I requirements.
6.How does Aetrix verify that SMCJ17AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMCJ17AHM3/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 SMCJ17AHM3/I meets industry standards.
7.What is the process for return or replacement of SMCJ17AHM3/I?
All SMCJ17AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ17AHM3/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 SMCJ17AHM3/I part is unused and in its original packaging.
Return procedure for SMCJ17AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ17AHM3/I Tags
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