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Vishay General Semiconductor - Diodes Division SMCJ15CA-M3/57T
- Part No.:
- SMCJ15CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ15CA-M3/57T.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,897
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Product details
Overview
SMCJ15CA-M3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. 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 (10/1000 µs waveform), commonly deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMCJ15CA-M3/57T datasheet, SMCJ15CA-M3/57T pinout, SMCJ15CA-M3/57T application, or SMCJ15CA-M3/57T equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance, AEC-Q101 qualification eligibility (via HM3 suffix), and compatibility with automated SMT placement on 8 mm × 8 mm copper pads.
Technical Context
The SMCJ15CA-M3/57T operates as a silicon avalanche diode with symmetrical breakdown in both polarities, enabling protection against voltage transients regardless of polarity-critical for AC-coupled or floating signal paths. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and repeatable clamping performance across temperature (-55 °C to +150 °C).
Designed for unclamped inductive switching events (e.g., relay coils, solenoids) and ESD surges per IEC 61000-4-2, it delivers sub-nanosecond response time and maintains clamping within ±5% tolerance under repetitive 10/1000 µs pulses when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15 V - Maximum continuous reverse voltage before conduction begins; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 16.7–18.5 V at 1.0 mA - Guaranteed avalanche initiation range; ensures reliable turn-on during transients |
| VC (Clamping Voltage) | 24.4 V at 61.5 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; limits stress on downstream ICs |
| PPPM (Peak Pulse Power) | 1500 W - Sustains high-energy transients without failure when applied within thermal derating limits |
| IPPM (Peak Pulse Current) | 61.5 A - Maximum non-repetitive surge current the device can shunt while maintaining specified VC |
| TJmax | +150 °C - Enables operation in under-hood automotive environments and enclosed industrial enclosures |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with J-STD-020 MSL Level 1 |
Pinout & Package
SMCJ15CA-M3/57T 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 JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal serves as anode or cathode depending on transient polarity; no band marking required |
| Case (cathode side for unidirectional variants) | Thermal and mechanical interface | Not electrically active; provides thermal path to PCB copper; requires 8.0 mm × 8.0 mm pad per terminal for rated PPPM |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions-eliminates need for polarity-aware layout in AC or differential signal protection |
| Low clamping ratio (VC/VWM) | 1.63 - Minimizes overvoltage overshoot relative to operating rail, reducing risk of latch-up in protected ICs |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-1752A material declaration requirements and JEDEC J-STD-020 MSL Level 1 reflow profile (260 °C peak) |
| High surge current capability | 61.5 A IPPM with <1 ns response-shunts fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a) before downstream components react |
| AEC-Q101 qualification path | HM3 variant available-supports automotive-grade reliability validation including HTOL, TCT, and ESD testing per AEC standard |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and MEMS pressure sensors from load dump and inductive kickback in engine control modules. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and ground, clamping transients before they reach the input ESD structure of the transceiver IC. Use Value: Maintains signal integrity during 12 V system load dump (ISO 7637-2 Pulse 5a) by limiting voltage to ≤24.4 V, preventing damage to 3.3 V or 5 V tolerant receivers. | Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers exposed to field wiring surges and lightning-induced coupling. IC Role / Device Role / Timing Role: Parallel-connected TVS across input terminals, absorbing energy from 1 kV/500 A surge (IEC 61000-4-5) without disrupting loop calibration. Use Value: Clamps induced common-mode transients to <25 V while preserving <1 µA leakage at 24 V nominal supply-ensuring analog accuracy remains within 0.1% FS. |
| Telecom Line Card Protection | Consumer USB Port ESD Suppression |
Use Scenario: Shielding Ethernet PHY front-end circuits on telecom line cards from lightning-induced surges entering via RJ-45 jacks. IC Role / Device Role / Timing Role: Primary protection device on each twisted pair, coordinated with secondary GDT or polymer PTC for staged energy handling. Use Value: Responds within <1 ns to 10/700 µs telecom surges, limiting peak voltage to 24.4 V and enabling downstream silicon-based secondary protectors to operate within safe SOA. | Use Scenario: Adding robust ESD immunity to USB 2.0 data lines (D+/D−) in portable audio devices subjected to ±15 kV contact discharge (IEC 61000-4-2). IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at connector, shunting ESD current away from USB transceiver ESD diodes. Use Value: Delivers <1 µA leakage at 5 V and clamps ±15 kV ESD events to <25 V, preventing data corruption and transceiver latch-up without degrading 480 Mbps signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC15CA | Same VWM (15 V) and VC (24.4 V), but lower PPPM = 600 W and smaller SMA package (DO-214AC); 30% smaller footprint | Lower surge rating suits consumer electronics with infrequent, low-energy transients-not recommended for automotive or industrial mains-coupled surges | Select SAC15CA only when board space is constrained and surge threat level is limited to IEC 61000-4-2 ESD only |
| 1.5KE15CA | Through-hole TO-218 package; identical electrical specs (VWM = 15 V, VC = 24.4 V, PPPM = 1500 W), but incompatible with SMT assembly | Used in legacy industrial power supplies where manual assembly or wave soldering is retained; not suitable for high-density PCBs | Choose 1.5KE15CA only for through-hole designs requiring drop-in replacement of older TVS families without redesigning layout |
Compared with SAC15CA and 1.5KE15CA, the SMCJ15CA-M3/57T offers optimal balance of high surge capacity, SMT manufacturability, and thermal performance on standard PCB copper-making it preferred for new automotive and industrial designs requiring AEC-Q101 readiness and automated production.
Availability
SMCJ15CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC analog input conditioning, and telecom line card surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMCJ15CA-M3/57T 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 was developed for high-energy transient suppression in harsh environments-including automotive, industrial, and telecom infrastructure-where consistent clamping performance, low leakage, and AEC-Q101 compliance are mandatory.
FAQ
What is the maximum clamping voltage of the SMCJ15CA-M3/57T under a 10/1000 µs surge?
The SMCJ15CA-M3/57T has a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current of 61.5 A using the standardized 10/1000 µs waveform. This value is measured at TA = 25 °C with the device mounted on 8.0 mm × 8.0 mm copper pads per terminal, as specified in Vishay document 88394. The SMCJ15CA-M3/57T maintains this clamping performance across its full operating temperature range.
Is the SMCJ15CA-M3/57T suitable for automotive applications?
Yes-the SMCJ15CA-M3/57T is halogen-free and RoHS-compliant (M3 suffix), and belongs to the AEC-Q101-qualified SMCJ family. While the base M3 version is commercial grade, the HM3 variant (e.g., SMCJ15CA-HM3/57T) is fully AEC-Q101 qualified for automotive use. The SMCJ15CA-M3/57T shares identical electrical characteristics and thermal behavior with its HM3 counterpart, making it suitable for prototyping and non-safety-critical automotive subsystems pending formal qualification.
How does the bidirectional design of the SMCJ15CA-M3/57T affect its circuit implementation?
The SMCJ15CA-M3/57T has symmetrical avalanche characteristics in both directions, meaning it clamps equally for positive and negative transients without polarity sensitivity. This eliminates the need for orientation-aware placement on PCBs and simplifies protection of AC-coupled, differential, or floating signal paths. Unlike unidirectional TVS diodes, the SMCJ15CA-M3/57T has no cathode band marking-its terminals are functionally interchangeable, reducing assembly errors and enabling flexible routing in tight layouts.
What is the thermal resistance of the SMCJ15CA-M3/57T, and how does it impact power dissipation?
The SMCJ15CA-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended pad layout, and 15 °C/W junction-to-lead (RθJL). At ambient temperatures above 25 °C, its 6.5 W steady-state power dissipation (PD) must be derated linearly per Figure 2 in Vishay document 88394. For example, at 70 °C ambient, usable PD drops to ~3.7 W-confirming that the SMCJ15CA-M3/57T is intended for transient, not continuous, power handling.
Can the SMCJ15CA-M3/57T replace older 1.5KE series TVS diodes in existing designs?
The SMCJ15CA-M3/57T matches the electrical specifications (VWM = 15 V, VC = 24.4 V, PPPM = 1500 W) of the through-hole 1.5KE15CA but uses the surface-mount SMC (DO-214AB) package instead of TO-218. Therefore, it cannot serve as a direct drop-in replacement without PCB layout changes. However, its identical clamping behavior and surge rating make it a functional upgrade path for new designs seeking higher density, automated assembly, and improved thermal performance on standard FR-4 boards.
SMCJ15CA-M3/57T 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ15CA-M3/57T FAQ
1.How can I place an order for SMCJ15CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ15CA-M3/57T 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 SMCJ15CA-M3/57T reliable?
The price and inventory of SMCJ15CA-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ15CA-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ15CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ15CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ15CA-M3/57T?
SMCJ15CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ15CA-M3/57T 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 SMCJ15CA-M3/57T?
For technical support, including SMCJ15CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ15CA-M3/57T requirements.
6.How does Aetrix verify that SMCJ15CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ15CA-M3/57T 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 SMCJ15CA-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ15CA-M3/57T?
All SMCJ15CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ15CA-M3/57T, 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 SMCJ15CA-M3/57T part is unused and in its original packaging.
Return procedure for SMCJ15CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ15CA-M3/57T Tags
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