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Vishay General Semiconductor - Diodes Division SMCJ15CAHM3/I
- Part No.:
- SMCJ15CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ15CAHM3/I.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,684
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Product details
Overview
SMCJ15CAHM3/I 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 15 V stand-off voltage (VWM), 24.4 V maximum clamping voltage (VC) at 61.5 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMCJ15CAHM3/I datasheet, SMCJ15CAHM3/I pinout, SMCJ15CAHM3/I application, or SMCJ15CAHM3/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), junction temperature derating above 25 °C, and thermal resistance (RθJA = 75 °C/W) under standard pad layout.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transients induced by inductive switching or ESD events. Its bidirectional architecture ensures symmetrical clamping in both polarities, with breakdown voltage (VBR) ranging from 16.7 V to 18.5 V at 1 mA test current - validated per ANSI/IEEE C62.35 standards.
Thermal performance is defined by RθJA = 75 °C/W (junction-to-ambient, typical) and RθJL = 15 °C/W (junction-to-lead), requiring adherence to the specified 0.31" × 0.31" copper pad layout for rated PPPM. The device is qualified to AEC-Q101 and meets JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 16.7 V / 18.5 V at 1 mA - guaranteed breakdown threshold range defining turn-on consistency |
| VC @ IPPM | 24.4 V at 61.5 A - clamping voltage during 10/1000 μs surge, limiting downstream voltage stress |
| PPPM | 1500 W - peak transient power handling capability under standardized surge waveform |
| ID @ VWM | 1.0 μA - ultra-low leakage ensuring minimal standby power loss in high-impedance circuits |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
SMCJ15CAHM3/I uses the SMC (DO-214AB) package: a two-terminal, bidirectional surface-mount device with no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD22-B102, and meet JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (bidirectional) | One terminal of symmetrical PN junction; conducts surge current in either direction when V > |VBR| |
| Cathode | Transient current sink (bidirectional) | Second terminal of symmetrical PN junction; identical conduction behavior to Anode under reverse or forward surge |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Equal VBR and VC in both polarities - eliminates need for polarity-aware placement in AC-coupled or floating signal paths |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD - required for engine control, ADAS, and body electronics |
| Halogen-free & RoHS-compliant | HM3 suffix denotes halogen-free molding compound and lead finish - satisfies EU ELV and OEM environmental requirements |
| Low incremental surge resistance | Enables tight VC tolerance and stable clamping across production lots - critical for consistent system-level surge immunity |
| MSL Level 1 | Unlimited floor life at ≤30 °C/60% RH - supports standard SMT assembly without baking or dry pack |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-supplied microcontrollers and CAN transceivers from load dump and jump-start transients. IC Role / Device Role / Timing Role: Shunt TVS placed upstream of LDOs and interface ICs to clamp surges before they reach silicon. Use Value: Withstands 1500 W pulses and clamps to 24.4 V, preventing latch-up or gate oxide damage in downstream ICs during ISO 7637-2 Pulse 5a events. | Use Scenario: Safeguarding analog outputs (4–20 mA) and digital I/O (RS-485, LIN) in factory automation sensors exposed to motor switching noise. IC Role / Device Role / Timing Role: Bidirectional clamping element on differential or single-ended signal traces to suppress EFT and surge coupling. Use Value: Symmetrical 16.7–18.5 V VBR ensures equal protection against positive and negative transients - essential for floating or AC-coupled sensor interfaces. |
| Telecom DC Power Input Protection | Consumer Device USB Port ESD Protection |
Use Scenario: Securing 48 V PoE-powered network switches and base station radios against lightning-induced surges on primary DC input. IC Role / Device Role / Timing Role: Primary-stage TVS on bulk DC input, coordinated with upstream fuses and secondary-stage polymer PTCs. Use Value: 1500 W PPPM rating and 75 °C/W RθJA allow sustained surge handling without thermal runaway when mounted on 8 mm × 8 mm copper pads. | Use Scenario: Adding secondary-level surge immunity to USB Type-C ports in laptops and docking stations beyond built-in ESD diodes. IC Role / Device Role / Timing Role: Board-level TVS placed between connector and USB controller PHY to absorb contact discharge and cable discharge events. Use Value: 1.0 μA ID at 15 V VWM prevents loading of USB VBUS detection circuitry while delivering 24.4 V clamping to protect 5 V tolerant PHY inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15CAHE3/A | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W), same VWM/VBR/VC specs | Not suitable for 1500 W surge environments; limited to low-energy ESD or board-level EFT | Select when space-constrained and surge energy is ≤400 W; verify thermal margin with reduced pad area |
| SMCJ15CA-E3/57T | Same electrical specs and SMC package, but commercial-grade (non-AEC-Q101), RoHS-compliant E3 suffix (not halogen-free) | Lacks automotive qualification and halogen-free assurance - acceptable for industrial/commercial use only | Select for cost-sensitive non-automotive designs where AEC-Q101 and halogen-free are not mandated |
Compared with SMAJ15CAHE3/A and SMCJ15CA-E3/57T, the SMCJ15CAHM3/I uniquely combines 1500 W surge capacity, AEC-Q101 qualification, and halogen-free construction - making it the only option qualified for high-reliability automotive power rail protection with full environmental compliance.
Availability
SMCJ15CAHM3/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor modules, telecom power supplies, and consumer USB power delivery systems requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ15CAHM3/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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness against ISO 7637, IEC 61000-4-5, and ESD events is mandatory.
FAQ
What does the 'HM3' suffix indicate in SMCJ15CAHM3/I?
The HM3 suffix in SMCJ15CAHM3/I specifies halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It denotes matte tin-plated leads, JESD201 Class 2 whisker resistance, and compliance with automotive reliability testing - distinguishing it from commercial-grade E3/M3 variants and non-halogen-free HE3 versions. This makes SMCJ15CAHM3/I suitable for automotive under-hood and safety-critical applications.
Is SMCJ15CAHM3/I unidirectional or bidirectional, and how does that affect circuit placement?
SMCJ15CAHM3/I is a bidirectional TVS diode, meaning it provides symmetrical clamping in both polarities without cathode band marking. This allows placement on AC-coupled lines, floating grounds, or differential buses (e.g., CAN, RS-485) without orientation concerns. Unlike unidirectional variants, it does not require polarity alignment during SMT placement - simplifying assembly and eliminating risk of reverse installation errors in SMCJ15CAHM3/I deployments.
What is the maximum clamping voltage of SMCJ15CAHM3/I, and under what test condition is it specified?
The maximum clamping voltage (VC) of SMCJ15CAHM3/I is 24.4 V, measured at a peak pulse current (IPPM) of 61.5 A using the standardized 10/1000 μs double-exponential surge waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case transient events - critical for ensuring downstream ICs (e.g., 3.3 V or 5 V logic) remain within absolute maximum ratings when SMCJ15CAHM3/I activates.
How does the thermal resistance of SMCJ15CAHM3/I impact PCB layout design?
The SMCJ15CAHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W, which assumes mounting on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. Deviating from this layout - such as using smaller pads or insufficient internal copper layers - increases RθJA and risks exceeding the +150 °C maximum junction temperature during repeated surges. Proper thermal design is essential to maintain SMCJ15CAHM3/I's 1500 W PPPM rating in real-world applications.
Can SMCJ15CAHM3/I be used as a direct replacement for SMCJ15A or SMCJ15CA without redesign?
No - SMCJ15CAHM3/I is not a drop-in replacement for SMCJ15A (unidirectional) or generic SMCJ15CA (non-HM3). While electrically compatible in clamping behavior, the HM3 suffix confirms AEC-Q101 qualification and halogen-free materials, which may require requalification in automotive systems. Additionally, SMCJ15A has different polarity marking and forward characteristics; substituting it for SMCJ15CAHM3/I would compromise bidirectional protection. Always validate mechanical fit, thermal performance, and compliance documentation before substitution involving SMCJ15CAHM3/I.
SMCJ15CAHM3/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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 61.5A
- 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)
SMCJ15CAHM3/I FAQ
1.How can I place an order for SMCJ15CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ15CAHM3/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 SMCJ15CAHM3/I reliable?
The price and inventory of SMCJ15CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ15CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMCJ15CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ15CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ15CAHM3/I?
SMCJ15CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ15CAHM3/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 SMCJ15CAHM3/I?
For technical support, including SMCJ15CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ15CAHM3/I requirements.
6.How does Aetrix verify that SMCJ15CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMCJ15CAHM3/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 SMCJ15CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMCJ15CAHM3/I?
All SMCJ15CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ15CAHM3/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 SMCJ15CAHM3/I part is unused and in its original packaging.
Return procedure for SMCJ15CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ15CAHM3/I Tags
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