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Taiwan Semiconductor Corporation SMCJ15CAH
- Part No.:
- SMCJ15CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ15CAH.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,292
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Product details
Overview
SMCJ15CAH from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 15V working stand-off voltage (VWM), 16.7–18.5V breakdown voltage (VBR), and 24.4V maximum clamping voltage (VC) at 64A peak impulse current - designed to protect automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ15CAH datasheet, SMCJ15CAH pinout, SMCJ15CAH application, or SMCJ15CAH equivalent, this AEC-Q101 qualified TVS offers verified clamping performance, sub-1ps response time, <1µA reverse leakage above 10V, and compliance with JESD201 Class 2 whisker resistance and UL 94V-0 flammability standards.
Technical Context
The SMCJ15CAH is a glass passivated, bipolar junction TVS diode optimized for bidirectional surge suppression in DC power lines and signal interfaces. It delivers 1500W peak pulse power (tp = 1ms) with a clamping ratio of ~1.63 (VC/VWM) and thermal resistance of RθJC = 10°C/W, enabling robust transient immunity without derating in compact SMC packages.
Its electrical behavior conforms to ANSI/IEEE C62.35, supports fast transient response (<1.0ps rise to VBR), and maintains stable performance across -55°C to +150°C junction temperature range - validated under ISO 7637-2 test pulses including load-dump (Pulse 5a) and coupled transients (Pulse 1/2a/2b/3a/3b).
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 @ IT = 1 mA - guaranteed breakdown threshold for reliable turn-on margin |
| VC @ IPPM | 24.4 V @ 64 A - clamped voltage during 10/1000μs surge, limiting downstream stress |
| PPK | 1500 W - peak pulse power handling per single 1ms transient, per Fig.5 waveform |
| IR @ VWM | <1 µA - negligible leakage at rated stand-off, preserving low-power system integrity |
| TJ max | +150 °C - extended thermal capability for under-hood and industrial environments |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 0.210g mass and matte tin leads |
Pinout & Package
DO-214AB (SMC) package: molded epoxy case meeting UL 94V-0, polarity indicated by cathode band (bidirectional operation uses symmetrical terminals); terminals are matte tin-plated, solderable per J-STD-002, and qualified per JESD201 Class 2 whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | Identical terminal function in both directions - no polarity dependency; connects across protected line and ground |
| Case | Non-electrical mechanical interface | Thermally conductive but electrically isolated housing; provides mechanical anchoring and heat dissipation path to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive power electronics, including temperature cycling, HTRB, and ESD testing |
| ISO 7637-2 compliance | Passes Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) without failure |
| Glass passivated junction | Enhanced moisture resistance and long-term stability vs. epoxy-passivated alternatives, critical for harsh-environment deployment |
| Sub-1ps response time | Clamps within 1.0 ps from 0 V to VBR(min), intercepting fast-rising ESD and lightning-induced edges before IC damage occurs |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - compliant for green manufacturing and end-of-life recycling |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs, body control modules, and lighting drivers from load-dump transients and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping device placed at power entry point, shunting surges >24.4V directly to chassis ground. Use Value: Enables compliance with ISO 16750-2 and prevents latch-up or gate oxide rupture in downstream MOSFETs and microcontrollers. | Use Scenario: Safeguarding 24V digital input channels on programmable logic controllers exposed to relay coil kickback and field-wiring ESD. IC Role / Device Role / Timing Role: Bidirectional transient absorber between field-side signal and isolated controller side, referenced to common ground. Use Value: Eliminates need for external series impedance or optocoupler-level isolation in cost-sensitive I/O designs. |
| Telecom Power Supply Input | Consumer Appliance Motor Control |
Use Scenario: Front-end protection of AC/DC adapters and PoE injectors subjected to lightning-induced surges on Ethernet or AC mains lines. IC Role / Device Role / Timing Role: First-line defense parallel to bulk capacitor, clamping common-mode transients before they reach primary-side switching ICs. Use Value: Reduces required MOV size and extends lifetime of upstream rectifiers and PWM controllers under repetitive surge stress. | Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: Across-motor terminals to clamp inductive kickback, preventing radiated emissions and MOSFET avalanche failure. Use Value: Allows use of lower-voltage-rated motor driver FETs while maintaining EMC Class B compliance per CISPR 14-1. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA | 600W PPK rating, same VWM/VBR/VC specs, SMB package (smaller footprint, higher thermal resistance) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a (load dump) | Select when board space is constrained and surge energy does not exceed 600W |
| TPSMD15CA | 1500W PPK, identical VWM/VBR/VC, but lead-free matte tin finish only (no JESD201 Class 2 whisker data published) | No documented whisker resistance validation - not recommended for high-reliability automotive deployments | Acceptable for industrial consumer products where whisker risk is mitigated by conformal coating or shorter field life |
Compared with SMCJ15CAH, SMBJ15CA trades surge capacity for footprint reduction, while TPSMD15CA matches power rating but lacks AEC-Q101 and JESD201 Class 2 validation - making SMCJ15CAH the only choice for automotive-grade robustness and full ISO 7637-2 coverage.
Availability
SMCJ15CAH is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, and telecom power supply input stages requiring stable component supply, long-lifecycle support, and AEC-Q101 traceability.
Supply support for SMCJ15CAH 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power management, protection, and signal conditioning devices since 1979.
The SMCJ series was developed specifically for high-energy transient suppression in automotive and industrial systems, emphasizing AEC-Q101 reliability, ISO 7637-2 compliance, and surface-mount manufacturability in DO-214AB packaging.
FAQ
What does the 'CAH' suffix indicate in SMCJ15CAH?
The 'CAH' suffix denotes a bidirectional configuration (C), AEC-Q101 qualification (A), and halogen-free construction (H). Unlike unidirectional variants (e.g., SMCJ15H), SMCJ15CAH provides symmetrical clamping in both polarities - essential for protecting AC-coupled signals or floating DC buses where voltage reversal may occur during transients.
How does SMCJ15CAH differ from SMCJ15AH?
SMCJ15AH is unidirectional with cathode marking; SMCJ15CAH is bidirectional with no polarity marking. Their VBR (16.7–18.5V), VWM (15V), and VC (24.4V) are identical, but SMCJ15CAH clamps equally for positive and negative surges - critical for applications like RS-485 bus protection or dual-rail power inputs where reverse voltage events must be suppressed without external diode steering.
Is SMCJ15CAH suitable for ISO 16750-2 load-dump protection?
Yes - SMCJ15CAH meets ISO 16750-2 requirements for load-dump suppression (Pulse 5a) due to its 1500W peak power rating, 24.4V clamping voltage at 64A, and thermal resistance (RθJC = 10°C/W) that enables safe energy dissipation. It is commonly deployed at battery inputs of automotive ECUs where sustained 35V–40V transients must be limited below 28V for downstream 3.3V/5V logic.
What is the maximum allowable PCB trace length between SMCJ15CAH and protected circuitry?
For optimal clamping performance, PCB traces from SMCJ15CAH to protected node and ground should each be ≤5 mm. Longer traces add inductance that increases clamping voltage (ΔV = L·di/dt); at 64A/10ns (typical di/dt), 10 nH of trace inductance adds ~6.4V overshoot - degrading the 24.4V VC spec. Use wide, short copper pours and direct ground stitching vias adjacent to the SMCJ15CAH terminals.
Does SMCJ15CAH require derating at elevated ambient temperatures?
Yes - SMCJ15CAH's 1500W peak power rating applies only at TA = 25°C. Per Fig.2 in the datasheet, it must be linearly derated above 25°C: at 85°C ambient, maximum PPK drops to ~1050W (30% reduction). This is due to junction-to-ambient thermal resistance (RθJA = 55°C/W); ensure adequate copper area and airflow to maintain TJ ≤ 150°C during repeated surge events.
SMCJ15CAH 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:
- 1
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 64A
- 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)
SMCJ15CAH FAQ
1.How can I place an order for SMCJ15CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ15CAH 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 SMCJ15CAH reliable?
The price and inventory of SMCJ15CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ15CAH is usually 5 days.
3.What payment methods are accepted for SMCJ15CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ15CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ15CAH?
SMCJ15CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ15CAH 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 SMCJ15CAH?
For technical support, including SMCJ15CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ15CAH requirements.
6.How does Aetrix verify that SMCJ15CAH is sourced from the original manufacturer or authorized distributors?
All SMCJ15CAH 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 SMCJ15CAH meets industry standards.
7.What is the process for return or replacement of SMCJ15CAH?
All SMCJ15CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ15CAH, 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 SMCJ15CAH part is unused and in its original packaging.
Return procedure for SMCJ15CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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