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Vishay General Semiconductor - Diodes Division SMCJ17AHM3_A/H
- Part No.:
- SMCJ17AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ17AHM3_A/H.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,712
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Product details
Overview
SMCJ17AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 17 V standoff voltage (VWM), 18.9–20.9 V breakdown voltage (VBR), 27.6 V clamping voltage (VC) at 54.3 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform.
For engineers reviewing the SMCJ17AHM3_A/H datasheet, SMCJ17AHM3_A/H pinout, SMCJ17AHM3_A/H application, or SMCJ17AHM3_A/H equivalent, key selection criteria include clamping performance under 54.3 A surge, thermal resistance (RθJA = 75 °C/W), AEC-Q101 qualification status, halogen-free RoHS compliance, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ17AHM3_A/H uses a glass-passivated silicon junction optimized for fast response (<1 ns) and low incremental surge resistance, enabling effective suppression of transient energy before downstream ICs or MOSFETs are damaged. Its unidirectional polarity-marked by a cathode band-ensures correct orientation in DC-biased signal or power lines.
Rated for -55 °C to +150 °C operating junction temperature and meeting MSL Level 1 per J-STD-020 (260 °C peak reflow), it supports automotive-grade reliability with halogen-free construction and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected line. |
| VBR (min/max) | 18.9 V / 20.9 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on threshold across production lot. |
| VC @ IPPM | 27.6 V - Clamped voltage at 54.3 A peak pulse current (10/1000 µs); determines maximum stress imposed on downstream components during surge. |
| PPPM | 1500 W - Peak pulse power handling capability; enables robust protection against high-energy transients like ISO 7637-2 Pulse 5a. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard PCB pad layout; informs derating requirements above 25 °C ambient. |
| TJ max. | +150 °C - Maximum allowable junction temperature; supports operation in under-hood automotive environments. |
| Package | SMC (DO-214AB) - Surface-mount outline with 8.13 mm × 6.22 mm footprint and 2.62 mm height; compatible with standard SMT pick-and-place equipment. |
Pinout & Package
SMCJ17AHM3_A/H is housed in an SMC (DO-214AB) package with two terminals: anode and cathode. The cathode is marked by a visible band on the body; polarity must be observed during PCB layout to ensure proper unidirectional clamping function.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when reverse voltage exceeds VBR. |
| Anode | Reference/ground return | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces requiring long-term reliability under thermal cycling and vibration. |
| Halogen-free & RoHS-compliant | Meets environmental compliance mandates for industrial and consumer electronics without compromising surge robustness or thermal performance. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD or inductive kick), improving protection margin for 3.3 V or 5 V logic interfaces. |
| MSL Level 1 rating | Enables use in standard reflow processes up to 260 °C peak without moisture-related popcorn failure or delamination. |
| Glass passivated junction | Provides stable leakage characteristics (<1 µA at VWM) and long-term parameter stability across temperature and humidity stress conditions. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 17 V. Use Value: Limits peak clamped voltage to 27.6 V at 54.3 A, safeguarding 36 V-rated power management ICs and microcontrollers. |
Use Scenario: Shielding analog outputs of pressure or temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS on signal line to ground, minimizing distortion of mV-level sensor signals. Use Value: Sub-1 µA leakage at 17 V ensures no measurable offset error in precision instrumentation amplifiers. |
| Telecom DC Power Input Protection | Consumer USB Power Delivery Line Protection |
|
Use Scenario: Guarding 48 V PoE-powered switches and routers against lightning-induced surges on Ethernet ports. IC Role / Device Role / Timing Role: Primary surge suppressor on DC input rail upstream of DC-DC converters. Use Value: 1500 W PPPM rating handles multi-kV transients while maintaining <27.6 V clamping to preserve converter input stage integrity. |
Use Scenario: Securing 20 V USB PD input circuits in portable monitors and docking stations against accidental AC adapter misconnection. IC Role / Device Role / Timing Role: Unidirectional TVS between VBUS and ground to absorb 10/1000 µs surges exceeding 20 V. Use Value: 18.9–20.9 V VBR ensures activation just above nominal PD voltage, preventing false triggering during normal operation. |
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/H | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W). | Suitable for lower-energy transients or space-constrained layouts where 1500 W rating is unnecessary. | Select when board area is critical and surge threat level is limited to IEC 61000-4-2 contact discharge only. |
| SMCJ17AHE3_A/H | Same electrical specs and SMC package, but RoHS-compliant without halogen-free certification. | Acceptable for commercial/industrial use where halogen-free material compliance is not mandated. | Choose for cost-sensitive non-automotive designs where AEC-Q101 is not required. |
Compared with SMCJ17AHM3_A/H, SMAJ17AHE3_A/H trades surge capacity and thermal performance for compact size, while SMCJ17AHE3_A/H offers identical protection with relaxed environmental compliance-enabling trade-offs between automotive qualification, halogen content, and footprint constraints.
Availability
SMCJ17AHM3_A/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power supplies, and USB PD systems requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMCJ17AHM3_A/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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series was developed to deliver high-power transient suppression in ruggedized surface-mount packages for automotive, industrial, and telecom infrastructure-balancing clamping performance, thermal robustness, and manufacturability.
FAQ
What is the clamping voltage of SMCJ17AHM3_A/H at its rated peak pulse current?
The SMCJ17AHM3_A/H has a maximum clamping voltage (VC) of 27.6 V when subjected to its rated peak pulse current (IPPM) of 54.3 A using a 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ17AHM3_A/H maintains this clamping performance across its qualified operating temperature range.
Is SMCJ17AHM3_A/H qualified for automotive applications?
Yes, SMCJ17AHM3_A/H is AEC-Q101 qualified, as indicated by the "HM3" suffix in its ordering code. This qualification confirms that the device has passed stress tests for temperature cycling, humidity bias, mechanical shock, and other automotive-relevant reliability requirements. The SMCJ17AHM3_A/H is intended for use in engine control modules, body electronics, and ADAS sensor interfaces where long-term reliability under harsh environmental conditions is mandatory.
What does the "HM3" suffix signify in SMCJ17AHM3_A/H?
The "HM3" suffix in SMCJ17AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Specifically, "H" indicates halogen-free molding compound, "M3" confirms RoHS compliance per EU Directive 2011/65/EU, and the base P/N structure (SMCJ17A) combined with HM3 confirms full automotive qualification. This distinguishes it from non-automotive variants like SMCJ17A-E3 or SMCJ17A-M3.
How does the thermal resistance of SMCJ17AHM3_A/H affect its power derating?
The SMCJ17AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W on the recommended 8.0 mm × 8.0 mm copper pad layout. This value directly determines its power derating curve: above 25 °C ambient, its 6.5 W steady-state power dissipation must be linearly reduced by 86.7 mW/°C. For example, at 85 °C ambient, the usable PD drops to approximately 1.1 W. The SMCJ17AHM3_A/H's RθJL of 15 °C/W further supports efficient heat transfer to PCB copper planes.
Can SMCJ17AHM3_A/H be used in bidirectional configurations?
No, SMCJ17AHM3_A/H is a unidirectional TVS diode, as confirmed by its "A" suffix and cathode band marking. Bidirectional variants carry the "CA" suffix (e.g., SMCJ17CA) and lack polarity markings. Using SMCJ17AHM3_A/H in a bidirectional application would result in forward conduction during negative transients, potentially damaging the device or failing to suppress. For AC-coupled or floating signal lines, the SMCJ17CA or equivalent bidirectional part must be selected instead of SMCJ17AHM3_A/H.
SMCJ17AHM3_A/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:
- 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/H FAQ
1.How can I place an order for SMCJ17AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ17AHM3_A/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 SMCJ17AHM3_A/H reliable?
The price and inventory of SMCJ17AHM3_A/H 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/H is usually 5 days.
3.What payment methods are accepted for SMCJ17AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ17AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ17AHM3_A/H?
SMCJ17AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ17AHM3_A/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 SMCJ17AHM3_A/H?
For technical support, including SMCJ17AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ17AHM3_A/H requirements.
6.How does Aetrix verify that SMCJ17AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ17AHM3_A/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 SMCJ17AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ17AHM3_A/H?
All SMCJ17AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ17AHM3_A/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 SMCJ17AHM3_A/H part is unused and in its original packaging.
Return procedure for SMCJ17AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ17AHM3_A/H Tags
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