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Vishay General Semiconductor - Diodes Division SMCJ15CAHM3_A/I
- Part No.:
- SMCJ15CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ15CAHM3_A/I.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,660
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Product details
Overview
SMCJ15CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 15 V standoff 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 in automotive sensor signal lines, industrial I/O ports, and DC power rails.
For engineers reviewing the SMCJ15CAHM3_A/I datasheet, SMCJ15CAHM3_A/I pinout, SMCJ15CAHM3_A/I application, or SMCJ15CAHM3_A/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), and thermal resistance (RθJA = 75 °C/W) under standard PCB pad layout.
Technical Context
The SMCJ15CAHM3_A/I operates as a silicon avalanche diode with glass-passivated junction, delivering symmetrical clamping in both polarities due to its bidirectional construction. Its breakdown voltage (VBR) ranges from 16.7 V to 18.5 V at 1 mA test current, with temperature coefficient of +0.088 %/°C - enabling stable transient suppression across -55 °C to +150 °C operating junction range.
It responds within picoseconds to transients, exhibits low incremental surge resistance, and maintains <1.0 µA reverse leakage at VWM. The device meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101, confirming suitability for automotive-grade reliability requirements without derating in standard mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - maximum continuous reverse operating voltage before clamping initiates; defines safe DC bias margin for protected circuitry |
| VBR min/max | 16.7 V / 18.5 V at 1 mA - ensures predictable avalanche onset across production lot; tight tolerance supports consistent system-level protection thresholds |
| VC @ IPPM | 24.4 V at 61.5 A - clamping voltage during 10/1000 µs surge; limits downstream IC stress below 25 V during worst-case transient events |
| PPPM | 1500 W - peak pulse power handling capability; enables protection against high-energy surges like ISO 7637-2 Pulse 5a/b in automotive environments |
| TJ max | +150 °C - maximum junction temperature; supports operation in under-hood automotive or industrial enclosures without forced cooling |
| RθJA | 75 °C/W - thermal resistance junction-to-ambient on standard 8 mm × 8 mm copper pads; informs board-level thermal design for sustained power dissipation |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 2.06 mm height and 7.75 mm length; compatible with automated pick-and-place and reflow soldering |
Pinout & Package
SMCJ15CAHM3_A/I uses the SMC (DO-214AB) package: a two-terminal, bidirectional device with no polarity marking - both terminals are electrically symmetric and interchangeable. The case is molded compound rated UL 94 V-0; matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals serve identical roles in bidirectional clamping; no cathode band marking; enables flexible PCB layout without orientation constraints |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces; supports zero-failure-rate field deployment |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental regulations and JEDEC JESD201 Class 2 whisker resistance; eliminates brominated flame retardants in molding compound |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD or inductive kickback), improving protection margin for sub-20 V logic ICs |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profiles up to 260 °C peak; eliminates baking requirements prior to assembly |
| 1500 W peak pulse power | Handles high-energy surges such as lightning-induced surges on industrial communication lines (RS-485, CAN) without degradation |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments subject to load dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between sensor signal line and ground, absorbing reverse- and forward-polarity surges before reaching ADC input. Use Value: Maintains signal integrity by limiting transient voltage to ≤24.4 V, preventing latch-up or damage to 3.3 V/5 V sensor interface ICs. |
Use Scenario: Safeguarding differential data lines of RS-485 transceivers in factory automation PLCs exposed to motor switching noise and ground bounce. IC Role / Device Role / Timing Role: Placed across A/B bus lines and ground in common-mode configuration to suppress EFT and surge energy coupled onto twisted-pair cabling. Use Value: Enables reliable 10 Mbps data transmission by clamping common-mode transients while preserving signal edge fidelity via low capacitance (<100 pF typical). |
| DC Power Rail Protection | Consumer USB Port ESD Shielding |
|
Use Scenario: Guarding 12 V/24 V DC input rails of embedded controllers in telecom power supplies against inductive switching spikes and hot-swap surges. IC Role / Device Role / Timing Role: Connected between rail and ground as primary overvoltage shunt, activated only during transient events exceeding 15 V standoff threshold. Use Value: Prevents brownout or reset events by limiting rail sag during clamping, thanks to 1500 W energy absorption capacity and low dynamic impedance. |
Use Scenario: Integrated into USB 2.0 Type-A port PCB layout of smart home hubs to meet IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) ESD immunity. IC Role / Device Role / Timing Role: Positioned at connector entry point to divert ESD current away from USB PHY and controller ICs before propagation into system. Use Value: Achieves pass/fail compliance without additional filtering components, leveraging sub-nanosecond response and <1 µA leakage at 15 V operating voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15CAHE3_A/I | Lower PPPM (400 W), same VWM (15 V), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Targeted for space-constrained consumer electronics with lower surge exposure; not AEC-Q101 qualified | Select when board area is critical and surge threat level is limited to IEC 61000-4-2 ESD only |
| SMCJ15CA-E3/57T | Same electrical specs and SMC package, but commercial-grade (E3 suffix), non-AEC-Q101, RoHS-compliant but not halogen-free | Suitable for industrial or computing applications where automotive qualification is unnecessary | Choose for cost-sensitive designs requiring identical performance without automotive reliability validation |
Compared with SMCJ15CAHM3_A/I, SMAJ15CAHE3_A/I trades surge robustness for size reduction and lacks automotive qualification, while SMCJ15CA-E3/57T matches form-factor and clamping performance but omits halogen-free composition and AEC-Q101 validation - making SMCJ15CAHM3_A/I the sole option meeting full automotive environmental and reliability requirements.
Availability
SMCJ15CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and DC power rail protection requiring stable component supply, long-term lifecycle support, and traceable halogen-free sourcing.
Supply support for SMCJ15CAHM3_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, 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 - targeting automotive, industrial, and telecom infrastructure where failure modes must be eliminated through validated ruggedness.
FAQ
What does the "HM3" suffix indicate in SMCJ15CAHM3_A/I?
The "HM3" suffix in SMCJ15CAHM3_A/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms the device meets automotive reliability standards, contains no brominated or chlorinated flame retardants, and passes JEDEC JESD201 Class 2 whisker testing - distinguishing it from commercial-grade variants like SMCJ15CA-E3/57T.
Is SMCJ15CAHM3_A/I unidirectional or bidirectional?
SMCJ15CAHM3_A/I is a bidirectional TVS diode, as indicated by the "CA" suffix. It provides symmetrical clamping in both voltage polarities, with identical breakdown and clamping characteristics for positive and negative transients - ideal for protecting AC-coupled or differential signal lines without polarity concerns.
What is the maximum clamping voltage of SMCJ15CAHM3_A/I at rated surge current?
The maximum clamping voltage (VC) of SMCJ15CAHM3_A/I is 24.4 V at 61.5 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry downstream will not experience voltages exceeding 24.4 V during worst-case surge events.
Does SMCJ15CAHM3_A/I require special PCB layout considerations?
Yes - SMCJ15CAHM3_A/I achieves its rated 1500 W pulse power only when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads per terminal, per Vishay Document 88394. Smaller pads increase thermal resistance and reduce surge capability; routing traces directly to large copper planes improves heat dissipation and maintains clamping performance under repeated surges.
How does SMCJ15CAHM3_A/I differ from SMCJ15A (unidirectional)?
SMCJ15CAHM3_A/I is bidirectional with symmetrical clamping and no cathode marking, while SMCJ15A is unidirectional with a cathode band and conducts only in reverse bias. The "CA" version supports AC or floating-line protection; the "A" version is suited for DC rail-to-ground protection where polarity is fixed - their VWM, VC, and PPPM ratings are otherwise identical.
SMCJ15CAHM3_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:
- -
- 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_A/I FAQ
1.How can I place an order for SMCJ15CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ15CAHM3_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 SMCJ15CAHM3_A/I reliable?
The price and inventory of SMCJ15CAHM3_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 SMCJ15CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ15CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ15CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ15CAHM3_A/I?
SMCJ15CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ15CAHM3_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 SMCJ15CAHM3_A/I?
For technical support, including SMCJ15CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ15CAHM3_A/I requirements.
6.How does Aetrix verify that SMCJ15CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ15CAHM3_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 SMCJ15CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ15CAHM3_A/I?
All SMCJ15CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ15CAHM3_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 SMCJ15CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMCJ15CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ15CAHM3_A/I Tags
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