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Vishay General Semiconductor - Diodes Division SMCJ17AHM3_A/I
- Part No.:
- SMCJ17AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ17AHM3_A/I.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,335
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Product details
Overview
SMCJ17AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection. It features a 17 V standoff voltage (VWM), 18.9–20.9 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 μs), and clamps transients to ≤27.6 V at 54.3 A IPPM - deployed on power rails and signal lines of automotive ECUs and industrial motor drives.
For engineers reviewing the SMCJ17AHM3_A/I datasheet, SMCJ17AHM3_A/I pinout, SMCJ17AHM3_A/I application, or SMCJ17AHM3_A/I equivalent, key selection criteria include verified clamping voltage under 27.6 V at rated surge current, AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), and thermal resistance (RθJA = 75 °C/W) for board-level thermal design validation.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, responding within <1 ps to transient overvoltages induced by inductive switching or ESD events. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 μA at 17 V), while the SMC package supports automated placement and meets MSL Level 1 (260 °C reflow).
The device is rated for TJ = -55 °C to +150 °C and delivers 1500 W peak pulse power with a 10/1000 μs waveform when mounted on 8.0 mm × 8.0 mm copper pads. Its incremental surge resistance is minimized to sustain fast energy dissipation without thermal runaway during repetitive surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (Breakdown Voltage) | 18.9–20.9 V at 1 mA - guaranteed avalanche conduction onset range for reliable triggering |
| VC (Clamping Voltage) | ≤27.6 V at IPPM = 54.3 A - limits downstream IC voltage stress during 10/1000 μs surge |
| PPPM (Peak Pulse Power) | 1500 W - energy-handling capacity for transient suppression per IEC 61000-4-5 Level 4 |
| ID (Reverse Leakage) | ≤1.0 μA at 17 V - negligible standby power loss and minimal signal line loading |
| TJ max. | +150 °C - enables operation in under-hood automotive and high-temperature industrial environments |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with cathode band marking |
Pinout & Package
SMCJ17AHM3_A/I uses the standard SMC (DO-214AB) package: 2-terminal, unidirectional configuration with molded epoxy body, matte tin-plated leads, and cathode band marking on the anode side. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H), compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected circuit ground or low-side return path | Enables unidirectional clamping from cathode to anode during positive transients on the cathode side |
| Cathode | Marked end (band); connected to protected line (e.g., 12 V rail, CAN_H, sensor supply) | Acts as the high-side surge input node - absorbs and shunts overvoltage to ground via anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification |
| Halogen-free & RoHS-compliant (HM3) | Meets JEDEC J-STD-208 material requirements and EU RoHS Directive 2011/65/EU without brominated flame retardants |
| Low incremental surge resistance | Ensures stable clamping performance across multiple surge events without parameter drift or thermal degradation |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (peak 260 °C) without baking preconditioning |
| Glass passivated junction | Provides consistent VBR tolerance, low leakage, and long-term stability under thermal and humidity stress |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
|
Use Scenario: Protects 12 V power inputs and LIN bus lines against load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between fused 12 V rail and local regulator input, clamping transients before LDO or MCU power pins. Use Value: Limits voltage to ≤27.6 V during 1500 W surges, preventing brownout or latch-up in automotive microcontrollers. |
Use Scenario: Shields 24 V DC digital input channels from field-wiring induced surges (IEC 61000-4-4 EFT) and relay coil kickback. IC Role / Device Role / Timing Role: Front-end protection device on optocoupler input side, absorbing fast transients before signal conditioning circuitry. Use Value: Maintains ≤1.0 μA leakage at 24 V nominal, avoiding false triggering of high-impedance input comparators. |
| Telecom Power Supply OVP Stage | Motor Drive Gate Driver Protection |
|
Use Scenario: Guards primary-side DC bus (e.g., 48 V telecom rectifier output) against lightning-induced surges (IEC 61000-4-5) IC Role / Device Role / Timing Role: Secondary-stage overvoltage clamp after bulk filter, coordinated with upstream MOVs for staged energy handling. Use Value: Delivers 1500 W peak power rating with 75 °C/W RθJA, enabling compact heatsink-free layout on 48 V distribution boards. |
Use Scenario: Safeguards isolated gate driver supply rails (e.g., 15 V bootstrap or auxiliary supply) from Miller-induced spikes during SiC MOSFET switching. IC Role / Device Role / Timing Role: Local clamping element adjacent to gate driver IC VDD pin, minimizing loop inductance for sub-nanosecond response. Use Value: Clamps 10/1000 μs transients to ≤27.6 V within <1 ps, preserving gate oxide integrity during high-dV/dt switching events. |
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/I | Lower PPPM (400 W), same VWM/VBR, SMA package (smaller footprint, higher RθJA = 110 °C/W) | Suitable only for lower-energy transients (IEC 61000-4-2 ESD, not IEC 61000-4-5) | Select when space-constrained layouts prioritize size over surge robustness. |
| SMCJ17AHE3_A/I | Same electrical specs but RoHS-compliant commercial grade (E3), not halogen-free or AEC-Q101 qualified | Lacks automotive qualification and halogen-free certification; limited to non-automotive industrial use | Choose for cost-sensitive consumer or commercial equipment where AEC-Q101 is not required. |
Compared with SMCJ17AHM3_A/I, SMAJ17AHE3_A/I trades surge capacity for smaller size, while SMCJ17AHE3_A/I retains identical clamping performance but omits halogen-free and automotive qualifications - making SMCJ17AHM3_A/I the sole option meeting full AEC-Q101 + halogen-free + 1500 W requirements.
Availability
SMCJ17AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, telecom power systems, and motor drive designs requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMCJ17AHM3_A/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 and application-specific performance.
The SMCJ series targets high-reliability transient suppression in harsh environments, with design focus on automotive, industrial, and telecom infrastructure where sustained surge immunity and long-term parametric stability are critical.
FAQ
What is the clamping voltage of SMCJ17AHM3_A/I at its rated peak pulse current?
The SMCJ17AHM3_A/I clamps to a maximum of 27.6 V when subjected to its rated peak pulse current of 54.3 A (10/1000 μs waveform). This value is measured under standardized test conditions with 8.0 mm × 8.0 mm copper pads per terminal and defines the upper voltage limit imposed on protected circuits during surge events. The clamping performance is guaranteed across the full operating temperature range of -55 °C to +150 °C.
Is SMCJ17AHM3_A/I qualified for automotive applications?
Yes, SMCJ17AHM3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in the SMCJ5.0A–SMCJ188CA datasheet (Document Number 88394, Revision 09-Jan-2024). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, making SMCJ17AHM3_A/I suitable for under-hood and chassis-mounted automotive modules such as body control units and ADAS power supplies.
How does the HM3 suffix differ from the HE3 suffix in SMCJ17A variants?
The HM3 suffix denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified construction, whereas HE3 indicates RoHS-compliance and AEC-Q101 qualification but not halogen-free materials. Both meet automotive reliability standards, but SMCJ17AHM3_A/I satisfies additional environmental requirements for halogen-free PCB assembly - critical for manufacturers adhering to IPC-4101D and JEDEC J-STD-208 specifications.
What is the thermal resistance of SMCJ17AHM3_A/I, and how does it affect PCB layout?
SMCJ17AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended pad layout (0.31" × 0.31" copper pads). This value assumes no external heatsinking and directly impacts safe power dissipation: at 25 °C ambient, the device can dissipate up to 6.5 W continuously. Layout must allocate adequate copper area to maintain junction temperature below 150 °C during repeated surge events.
Can SMCJ17AHM3_A/I be used in bidirectional protection circuits?
No, SMCJ17AHM3_A/I is a unidirectional TVS diode, indicated by the "A" (not "CA") suffix and cathode band marking. For bidirectional protection - such as AC lines or differential buses like RS-485 - the SMCJ17CAHM3_A/I variant must be used. Using SMCJ17AHM3_A/I in reverse-biased AC applications would result in forward conduction and potential failure due to excessive current flow.
SMCJ17AHM3_A/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:
- Active
- 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_A/I FAQ
1.How can I place an order for SMCJ17AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ17AHM3_A/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_A/I reliable?
The price and inventory of SMCJ17AHM3_A/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_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ17AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ17AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ17AHM3_A/I?
SMCJ17AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ17AHM3_A/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_A/I?
For technical support, including SMCJ17AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ17AHM3_A/I requirements.
6.How does Aetrix verify that SMCJ17AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ17AHM3_A/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_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ17AHM3_A/I?
All SMCJ17AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ17AHM3_A/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_A/I part is unused and in its original packaging.
Return procedure for SMCJ17AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ17AHM3_A/I Tags
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