My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ15AHM3/I
- Part No.:
- SMCJ15AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ15AHM3/I.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,272
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ15AHM3/I from Vishay General Semiconductor is a unidirectional 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 dissipation (10/1000 µs waveform), commonly deployed on DC power rails and I/O lines in automotive and industrial control modules.
For engineers reviewing the SMCJ15AHM3/I datasheet, SMCJ15AHM3/I pinout, SMCJ15AHM3/I application, or SMCJ15AHM3/I equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant construction (HM3 suffix), low incremental surge resistance, and verified clamping performance under repetitive transients per IEC 61000-4-5.
Technical Context
This TVS diode operates as a voltage-clamping device triggered by reverse-biased avalanche breakdown. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ps), while the SMC package provides high thermal mass and low-inductance terminals suitable for suppressing fast-rising ESD and lightning-induced surges.
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), enabling reliable operation on standard PCB copper pads without external heatsinking in most embedded applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin below circuit rail voltage. |
| VBR (Breakdown Voltage) | 16.7–18.5 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 24.4 V at 61.5 A (10/1000 µs) - Maximum voltage seen by protected circuit during full-rated surge; critical for IC-level survivability. |
| PPPM (Peak Pulse Power) | 1500 W - Surge energy handling capacity under standardized 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 compliance. |
| IPPM (Peak Pulse Current) | 61.5 A - Peak current capability at rated clamping voltage; determines minimum series impedance required upstream. |
| TJ max. | +150 °C - Maximum junction temperature rating; enables use in under-hood automotive environments and high-ambient industrial enclosures. |
| Package | SMC (DO-214AB) - Surface-mount package with 8.0 mm × 8.0 mm copper pad footprint; supports automated placement and meets UL 94 V-0 flammability. |
Pinout & Package
SMCJ15AHM3/I uses the standard SMC (DO-214AB) package: a 2-terminal surface-mount device with cathode band marking. The package measures 7.75 mm × 6.22 mm × 2.62 mm (L × W × H) and features matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased anode connection point | Connected to protected line; conducts during overvoltage to clamp to VC; polarity must match circuit rail orientation. |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes clamping current path during transient events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock-enables use in engine control units and ADAS sensor interfaces. |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental regulations and JESD201 Class 2 whisker resistance; eliminates halogenated flame retardants without compromising UL 94 V-0 rating. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients; improves clamping precision compared to higher-Rsurge TVS devices. |
| Fast response time (<1 ps) | Ensures clamping activation before sensitive downstream components experience damaging voltage excursions-critical for protecting high-speed logic and analog front-ends. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns; eliminates pre-bake requirement in SMT assembly. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontrollers and CAN transceivers against load dump and alternator ripple in vehicle body control modules. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between power input and ground, activated only during positive-going overvoltage events. Use Value: Limits transient voltage to ≤24.4 V during 61.5 A surges, preventing latch-up or gate oxide damage in 3.3 V/5 V logic ICs downstream. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC analog input cards in factory automation systems. IC Role / Device Role / Timing Role: Reverse-biased TVS on signal line to shunt induced ESD and switching noise from solenoid drivers. Use Value: Clamps fast transients within nanoseconds while maintaining <1 µA leakage at 15 V, preserving sensor accuracy and ADC resolution. |
| DC-DC Converter Input Protection | Telecom Line Card Surge Suppression |
Use Scenario: Shielding buck converter inputs from voltage spikes caused by hot-plug events or upstream capacitor discharge in telecom power supplies. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VIN rail, positioned before input filter capacitors to absorb energy before it reaches controller IC. Use Value: Handles 1500 W peak pulses without degradation, sustaining repeated 10/1000 µs surges per IEC 61000-4-5 with minimal derating up to +125 °C ambient. | Use Scenario: Front-end protection for Ethernet PHYs and PoE injectors exposed to lightning-induced surges on RJ45 ports in outdoor base stations. IC Role / Device Role / Timing Role: First-stage unidirectional TVS on DC bias lines feeding active Ethernet magnetics. Use Value: Provides 24.4 V clamping ceiling compatible with 24 V PoE voltage tolerances, ensuring no false triggering during normal operation while surviving 6 kV contact discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15AHE3/A | Lower PPPM (400 W), smaller SMA package (DO-214AC), same VWM/VC specs but reduced surge current (23.5 A). | Targeted at space-constrained consumer electronics; insufficient for automotive load dump or industrial 1500 W requirements. | Select only when board area is critical and surge energy is limited to ≤400 W. |
| SMCJ15A-M3/57T | Identical electrical specs and SMC package, but uses M3 (halogen-free RoHS) without AEC-Q101 qualification; same 15 V VWM, 24.4 V VC. | Approved for commercial/industrial use only; not validated for automotive temperature cycling or long-term reliability under vibration. | Choose for cost-sensitive non-automotive designs where AEC-Q101 is not mandated. |
Compared with SMCJ15AHM3/I, SMAJ15AHE3/A offers smaller footprint but sacrifices 75% surge power handling, while SMCJ15A-M3/57T matches mechanical and electrical performance but lacks automotive qualification-making SMCJ15AHM3/I the sole option when both 1500 W clamping and AEC-Q101 compliance are mandatory.
Availability
SMCJ15AHM3/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, and telecom power supply designs requiring stable component supply with guaranteed halogen-free and AEC-Q101-compliant sourcing.
Supply support for SMCJ15AHM3/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 is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments-including automotive, industrial, and telecom infrastructure-where consistent clamping and long-term stability are non-negotiable.
FAQ
What is the clamping voltage of SMCJ15AHM3/I at its rated peak pulse current?
The SMCJ15AHM3/I has a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current of 61.5 A under the standard 10/1000 µs waveform. This value is measured across the device terminals during surge conduction and represents the upper voltage limit imposed on the protected circuit. The clamping performance is guaranteed per Vishay Document Number 88394, Revision 09-Jan-2024, and is critical for ensuring downstream ICs remain within absolute maximum ratings during transient events. SMCJ15AHM3/I maintains this clamping behavior across its full operating temperature range.
Is SMCJ15AHM3/I suitable for automotive applications?
Yes, SMCJ15AHM3/I is explicitly qualified to AEC-Q101 standards, as confirmed by Vishay's ordering code suffix "HM3" and documentation in the SMCJ5.0A–SMCJ188CA datasheet (Rev. 09-Jan-2024). It undergoes rigorous stress testing-including temperature cycling, high-temperature operating life, and mechanical shock-to ensure reliability in under-hood and chassis-mounted automotive systems. The device's -55 °C to +150 °C operating junction temperature range, halogen-free construction, and MSL Level 1 rating further support its deployment in engine control units, ADAS camera modules, and body electronics where SMCJ15AHM3/I serves as primary overvoltage protection.
How does the HM3 suffix differ from the M3 or E3 suffix in SMCJ15A variants?
The HM3 suffix on SMCJ15AHM3/I denotes halogen-free, RoHS-compliant construction *and* AEC-Q101 qualification-distinguishing it from M3 (halogen-free RoHS, commercial grade only) and E3 (RoHS-compliant, commercial grade, non-halogen-free). All three share identical electrical specifications and SMC package dimensions, but only HM3-certified parts like SMCJ15AHM3/I are approved for automotive use. The "I" in SMCJ15AHM3/I indicates 13-inch tape-and-reel packaging (3500 units/reel), whereas "H" denotes 7-inch reels (850 units). This distinction ensures traceability and compliance alignment for OEM procurement.
What is the thermal resistance of SMCJ15AHM3/I, and how does it affect PCB layout?
SMCJ15AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W when mounted on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. These values mean that under 6.5 W steady-state power dissipation, the junction temperature rise above ambient will be ~488 °C without proper copper spreading-highlighting why the device relies on short, wide copper traces and thermal vias for real-world operation. For SMCJ15AHM3/I, PCB layout must replicate Vishay's specified pad dimensions to achieve rated surge performance; undersized pads increase RθJA and risk thermal runaway during repetitive transients.
Can SMCJ15AHM3/I be used in bidirectional configurations?
No, SMCJ15AHM3/I is a unidirectional TVS diode, as indicated by the "A" (not "CA") suffix and cathode band marking. It conducts only during reverse-biased overvoltage events and blocks forward current like a standard rectifier diode. For bidirectional protection-such as AC signal lines or differential buses-Vishay specifies the SMCJ15CA variant, which has symmetrical breakdown in both directions and no polarity marking. Using SMCJ15AHM3/I in a bidirectional application would leave the circuit unprotected during positive transients on the anode side. Always verify polarity alignment during placement, as incorrect orientation renders SMCJ15AHM3/I ineffective.
SMCJ15AHM3/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):
- 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)
SMCJ15AHM3/I FAQ
1.How can I place an order for SMCJ15AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ15AHM3/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 SMCJ15AHM3/I reliable?
The price and inventory of SMCJ15AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ15AHM3/I is usually 5 days.
3.What payment methods are accepted for SMCJ15AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ15AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ15AHM3/I?
SMCJ15AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ15AHM3/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 SMCJ15AHM3/I?
For technical support, including SMCJ15AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ15AHM3/I requirements.
6.How does Aetrix verify that SMCJ15AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMCJ15AHM3/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 SMCJ15AHM3/I meets industry standards.
7.What is the process for return or replacement of SMCJ15AHM3/I?
All SMCJ15AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ15AHM3/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 SMCJ15AHM3/I part is unused and in its original packaging.
Return procedure for SMCJ15AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ15AHM3/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
