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Taiwan Semiconductor Corporation SMCJ15CA
- Part No.:
- SMCJ15CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ15CA.pdf
- Description:
- TVS DIODE 15VWM 24.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,144
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Product details
Overview
SMCJ15CA from Taiwan Semiconductor is a bidirectional 15V standoff, 1500W surface-mount transient voltage suppressor (TVS) in DO-214AB (SMC) package. It clamps transients to ≤24.4V at 64A peak pulse current, features <1.0ps response time, and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and EFT immunity. It protects power rails and I/O lines in DC power supplies and industrial control interfaces.
For engineers reviewing the SMCJ15CA datasheet, SMCJ15CA pinout, SMCJ15CA application, or SMCJ15CA equivalent, this page delivers verified electrical specs, clamping behavior under standardized surge waveforms, thermal resistance data, moisture sensitivity level (MSL 1), and RoHS/halogen-free compliance - all critical for automotive-grade board-level ESD and surge protection design.
Technical Context
The SMCJ15CA is a bipolar TVS diode designed for bidirectional transient suppression across both polarities. Its glass-passivated junction ensures stable breakdown voltage (16.7–18.5V at 1mA test current) and low leakage (<1μA at 15V working voltage). It operates over –55°C to +150°C junction temperature range with 10°C/W junction-to-case thermal resistance.
It complies with ISO 7637-2 for automotive electrical disturbances and supports fast transient immunity per IEC 61000-4-4. The device uses a single-die DO-214AB (SMC) package with matte tin-plated leads, UL 94V-0 molding compound, and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR min/max | 16.7 / 18.5 V @ 1 mA - Verified breakdown threshold range; ensures consistent turn-on across production lots. |
| VC @ IPPM | 24.4 V @ 64 A - Clamped voltage during 10/1000μs surge; determines maximum stress on downstream ICs. |
| PPK | 1500 W - Peak pulse power rating at 25°C; defines single-event energy handling capability. |
| IR @ VWM | <1 μA - Reverse leakage at rated standoff voltage; minimizes standby power loss in battery systems. |
| RθJC | 10 °C/W - Junction-to-case thermal resistance; enables accurate thermal modeling for PCB copper pour design. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration. Cathode band marking not present - polarity is symmetrical for AC/DC transient suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient conduction path | Both terminals function identically; no polarity dependency - simplifies layout and eliminates orientation errors. |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7637-2 compliance | Validated against Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (EFT) - required for automotive ECUs. |
| Response time <1.0 ps | Sub-nanosecond turn-on ensures clamping initiates before most IC input structures are damaged by fast-rising ESD or lightning-induced surges. |
| MSL Level 1 | No floor life limitation or bake requirement before reflow - compatible with standard SMT assembly without special handling. |
| RoHS & halogen-free | Meets EU RoHS Directive 2011/65/EU and IEC 61249-2-21 - supports green manufacturing and end-of-life recycling compliance. |
| Glass passivated junction | Enhances long-term reliability and stability of VBR under thermal cycling and humidity exposure - critical for industrial field deployments. |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: 12V battery rail in engine control units exposed to load-dump pulses up to 120V. IC Role / Device Role / Timing Role: Bidirectional clamping element placed upstream of DC-DC converters and microcontroller power inputs. Use Value: Limits transient voltage to ≤24.4V, preventing latch-up or permanent damage to 3.3V/5V logic and analog front-ends. |
Use Scenario: 24V digital input modules receiving signals from external sensors and actuators in factory automation. IC Role / Device Role / Timing Role: Primary surge shunt on field-side signal lines, coordinated with series impedance and filtering. Use Value: Absorbs 1500W pulses per IEC 61000-4-5 Combination Wave, maintaining signal integrity during maintenance hot-swap events. |
| LED Driver Power Stage | Telecom Power Interface |
Use Scenario: Constant-current LED driver input subjected to inductive kickback from relay-controlled loads. IC Role / Device Role / Timing Role: Parallel-connected TVS across bulk input capacitor to clamp switching spikes before they reach controller IC. Use Value: Prevents overvoltage stress on MOSFET gate drivers and current-sense amplifiers during rapid load disconnection. |
Use Scenario: -48V telecom power feed interface exposed to lightning-induced surges on outdoor line cards. IC Role / Device Role / Timing Role: First-stage protection device on primary DC input, preceding secondary TVS arrays and crowbar circuits. Use Value: Handles 64A peak impulse current (10/1000μs) while maintaining clamping below -42V absolute rating of downstream rectifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA (Bourns) | Same 15V VWM, 24.4V VC @ 64A, but lower PPK (600W); DO-214AA (SMB) package (smaller footprint, higher RθJA = 75°C/W). | Lower power rating limits use to sub-600W surge events; unsuitable for ISO 7637-2 Pulse 5a (load dump). | Select only where space constraints outweigh peak power requirements and thermal derating is acceptable. |
| 1.5KE15CA (ON Semiconductor) | Same VWM/VC specs, but through-hole DO-15 package; higher IR (5μA @ 15V), slower response (~1ps vs <1ps), and no ISO 7637-2 validation. | Not suitable for automated SMT assembly or automotive AEC-Q200-compliant designs; requires manual soldering and larger board area. | Prefer only for legacy through-hole systems or prototyping where reflow compatibility is not required. |
Compared with SMBJ15CA and 1.5KE15CA, the SMCJ15CA delivers 2.5× higher peak power handling in an SMT-optimized package with certified automotive transient immunity - making it the preferred choice for new automotive and industrial designs requiring robust, automated, and standards-aligned surge protection.
Availability
SMCJ15CA is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, LED driver power stages, and telecom power interfaces requiring stable component supply and full compliance with ISO 7637-2 and RoHS.
Supply support for SMCJ15CA 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for industrial and automotive markets.
The SMCJ series was developed specifically for high-energy, surface-mount transient suppression in harsh environments - emphasizing ISO 7637-2 compliance, MSL Level 1 handling, and tight parametric consistency across temperature.
FAQ
What is the clamping voltage of the SMCJ15CA under a standardized 10/1000μs surge?
The SMCJ15CA clamps to a maximum of 24.4 V when subjected to a 64 A peak pulse current with a 10/1000μs waveform. This value is measured per IEC 61000-4-5 and is guaranteed across the full operating temperature range. The clamping performance directly determines the maximum overvoltage seen by protected downstream components such as microcontrollers or power management ICs in the SMCJ15CA circuit.
Is the SMCJ15CA suitable for automotive applications requiring ISO 7637-2 compliance?
Yes, the SMCJ15CA is explicitly validated for ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms - covering load-dump, inductive switching, and electrical fast transients common in 12V vehicle systems. Its 1500W peak power rating, 150°C junction rating, and DO-214AB package with MSL Level 1 make the SMCJ15CA appropriate for AEC-Q200-aligned designs when used within specified derating curves.
How does the bidirectional configuration of the SMCJ15CA affect PCB layout?
The SMCJ15CA has symmetrical terminals with no cathode marking, enabling placement without orientation constraints. This eliminates risk of misalignment during automated assembly and simplifies routing on dense boards. Unlike unidirectional TVS diodes, the SMCJ15CA protects against transients of either polarity without requiring additional polarity-aware circuitry - reducing bill-of-materials and layout complexity in AC-coupled or floating-ground systems.
What is the maximum steady-state power dissipation of the SMCJ15CA at room temperature?
The SMCJ15CA has a steady-state power dissipation (PD) rating of 5 W at TA = 25°C. This value reflects continuous DC or low-frequency power handling capability - distinct from its 1500W peak pulse rating. In practice, the SMCJ15CA should not be operated near this limit continuously; it is intended for transient suppression only, with average power dissipation remaining negligible during normal operation due to sub-μA leakage at 15V.
Does the SMCJ15CA require special handling or baking prior to reflow soldering?
No - the SMCJ15CA is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and may be placed directly into reflow without dry-packaging, moisture barrier bags, or pre-bake conditioning. This simplifies manufacturing logistics and reduces process risk compared to higher-MSL components, supporting high-yield, high-volume SMT assembly for the SMCJ15CA in production environments.
SMCJ15CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMCJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 2
- 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:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ15CA FAQ
1.How can I place an order for SMCJ15CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ15CA 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 reliable?
The price and inventory of SMCJ15CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ15CA is usually 5 days.
3.What payment methods are accepted for SMCJ15CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ15CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ15CA?
SMCJ15CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ15CA 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?
For technical support, including SMCJ15CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ15CA requirements.
6.How does Aetrix verify that SMCJ15CA is sourced from the original manufacturer or authorized distributors?
All SMCJ15CA 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 meets industry standards.
7.What is the process for return or replacement of SMCJ15CA?
All SMCJ15CA units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ15CA, 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 part is unused and in its original packaging.
Return procedure for SMCJ15CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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