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Taiwan Semiconductor Corporation SMCJ15CH
- Part No.:
- SMCJ15CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ15CH.pdf
- Description:
- 1500W, 18.6V, 10%, BIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,205
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Product details
Overview
SMCJ15CH from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, designed for automotive-grade surge protection with AEC-Q101 qualification, 15V working stand-off voltage (VWM), 16.7–20.4V breakdown voltage (VBR), and 26.9V maximum clamping voltage (VC) at 58A peak pulse current. It protects power rails and I/O lines in vehicle ECUs against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ15CH datasheet, SMCJ15CH pinout, SMCJ15CH application, or SMCJ15CH equivalent, this page delivers verified electrical parameters, thermal performance data, bidirectional variant compatibility (CH suffix), clamping behavior under 10/1000μs surge, and design guidance for ESD and load-switching immunity in automotive electronics.
Technical Context
The SMCJ15CH employs a glass-passivated silicon junction optimized for fast transient response (<1.0ps rise time from 0V to VBR min) and low leakage (<1μA at 15V). Its unidirectional configuration provides asymmetric clamping-forward conduction at ~3.5V (per VF spec for SMCJ5.0H–SMCJ90H series) and reverse avalanche clamping up to 26.9V.
Thermally, it features RθJA = 55°C/W and RθJC = 10°C/W, enabling reliable operation at TJ up to +150°C. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability standards, supporting automated SMT placement in high-reliability automotive PCB assembly.
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 / 20.4 V - Breakdown occurs within this range at 1 mA test current; defines turn-on threshold tolerance |
| VC @ IPPM | 26.9 V - Clamped voltage at 58 A peak pulse current (10/1000 μs waveform); determines protected circuit stress level |
| PPK | 1500 W - Peak pulse power handling capability; supports high-energy transients per ISO 7637-2 |
| IR @ VWM | <1 μA - Reverse leakage at rated stand-off voltage; ensures minimal standby power loss and signal integrity |
| TJ max | +150 °C - Maximum junction temperature; enables deployment in under-hood automotive environments |
| RθJA | 55 °C/W - Junction-to-ambient thermal resistance; informs heatsinking requirements on standard FR-4 PCB |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, single-die unidirectional TVS diode with cathode band marking. Case meets UL 94V-0; matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connects to lower-potential side of protected line; conducts <3.5 V during forward surge events |
| Cathode | Avalanche clamping terminal | Connects to higher-potential side (e.g., VBUS); initiates reverse breakdown at ≥16.7 V to clamp transients |
| Cathode band | Polarity indicator | Visible marking on package body; identifies cathode end for correct orientation during placement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS, and body electronics per stress test requirements |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) waveforms |
| Glass passivated junction | Enhances long-term reliability and moisture resistance vs. epoxy-passivated alternatives; supports MSL Level 1 handling |
| Fast response time | <1.0 ps from 0 V to VBR min - limits voltage overshoot during nanosecond-scale ESD events |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive; suitable for green manufacturing and end-of-life recycling |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VCC and GND to clamp transients above 15 V while remaining non-conductive during normal operation. Use Value: Limits peak rail voltage to ≤26.9 V during 1500 W surges, preventing MCU latch-up or damage without affecting steady-state regulation. | Use Scenario: Shielding analog sensor outputs (e.g., pressure or temperature transducers) connected via long cables in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional protection (via CH-suffix variant) across differential pairs to suppress ESD and inductive kickback from nearby solenoids or motors. Use Value: Clamps ±26.9 V transients with sub-nanosecond response, preserving signal fidelity and avoiding ADC saturation or front-end amplifier damage. |
| Telecom Line Surge Suppression | Consumer USB Port ESD Protection |
Use Scenario: Safeguarding Ethernet PHY interfaces in industrial gateways subjected to lightning-induced surges on PoE lines. IC Role / Device Role / Timing Role: Unidirectional TVS on DC bias lines (e.g., MDI pair center taps) to absorb common-mode energy while maintaining signal integrity. Use Value: Handles 10/1000 μs surges up to 58 A without degradation, meeting IEC 61000-4-5 Level 4 immunity requirements. | Use Scenario: Adding secondary-level ESD protection on USB VBUS lines in automotive infotainment head units. IC Role / Device Role / Timing Role: Standoff-rated TVS placed downstream of primary fuses to limit voltage excursion during ±8 kV contact discharge events. Use Value: Delivers <1 μA leakage at 5 V standby, eliminating standby current penalty while clamping to 26.9 V during fast-rising ESD pulses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A | Lower PPK (400 W), SMA package (smaller footprint, higher RθJA = 95°C/W), same VWM/VBR range | Not suitable for ISO 7637-2 Pulse 1 or high-energy load dump; limited to consumer-grade ESD/low-energy transients | Select SMCJ15CH when 1500 W surge rating and automotive qualification are required; SMAJ15A fits space-constrained non-automotive designs. |
| TPSMD15C | Same DO-214AB package and 1500 W rating, but Texas Instruments part with tighter VBR tolerance (16.7–18.5 V) and lower VC (24.4 V) | Offers marginally better clamping performance; identical AEC-Q101 and ISO 7637-2 compliance | Choose TPSMD15C if lower clamping voltage is critical for sensitive downstream ICs; SMCJ15CH provides cost-optimized alternative with validated field reliability. |
Compared with SMAJ15A and TPSMD15C, the SMCJ15CH delivers the highest balance of automotive qualification, thermal robustness (RθJC = 10°C/W), and surge margin for 12 V system protection-making it optimal for ECU power rail hardening where layout space allows DO-214AB.
Availability
SMCJ15CH is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, telecom surge protection circuits, and consumer USB power port hardening requiring stable component supply across production lifecycles.
Supply support for SMCJ15CH 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 with global distribution and AEC-Q101 validation capabilities.
The SMCJ series was developed specifically for automotive and industrial transient suppression, emphasizing high-power clamping, fast response, and robust packaging to meet stringent ISO 7637-2 and AEC-Q101 requirements.
FAQ
What does the "CH" suffix indicate in SMCJ15CH?
The "CH" suffix in SMCJ15CH denotes a unidirectional TVS diode with cathode-band polarity marking and forward voltage (VF) of 3.5 V at 100 A, consistent with the SMCJ5.0H–SMCJ90H family. This distinguishes it from "CAH" (tighter VBR tolerance) and "BH" (bidirectional) variants. The SMCJ15CH is not symmetrical-it conducts only in forward bias and clamps in reverse, making it ideal for DC power rail protection where polarity is fixed.
Does SMCJ15CH meet automotive qualification standards?
Yes, SMCJ15CH is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient waveforms. Its construction-including glass passivation, JESD201 Class 2 whisker resistance, and MSL Level 1 moisture sensitivity-ensures suitability for under-hood and chassis-mounted automotive electronics where thermal cycling and vibration endurance are critical.
What is the maximum clamping voltage of SMCJ15CH and how is it measured?
The maximum clamping voltage (VC) of SMCJ15CH is 26.9 V, measured at 58 A peak pulse current (IPPM) using the standardized 10/1000 μs double-exponential surge waveform per Fig.5 in the datasheet. This value represents worst-case voltage seen by downstream circuitry during a full 1500 W transient event and is guaranteed across temperature and production lot variations.
Can SMCJ15CH be used in bidirectional applications?
No-SMCJ15CH is strictly unidirectional. For bidirectional protection, select the SMCJ15CAH variant (marked "GEM"), which provides symmetrical clamping in both polarities with identical VBR and VC specs. Using SMCJ15CH in AC or floating-bus applications risks forward conduction during negative transients and inadequate protection.
How does the thermal performance of SMCJ15CH affect PCB layout?
With RθJA = 55°C/W and RθJC = 10°C/W, SMCJ15CH requires adequate copper pour (≥100 mm² per pad) and thermal vias beneath the cathode/anode pads to maintain TJ ≤150°C under repeated 1500 W surges. Layouts omitting thermal relief may exceed junction limits after just a few pulses, degrading clamping consistency and lifetime reliability-especially in enclosed automotive enclosures.
SMCJ15CH 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:
- 26.9V
- Current - Peak Pulse (10/1000µs):
- 58A
- 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)
SMCJ15CH FAQ
1.How can I place an order for SMCJ15CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ15CH 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 SMCJ15CH reliable?
The price and inventory of SMCJ15CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ15CH is usually 5 days.
3.What payment methods are accepted for SMCJ15CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ15CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ15CH?
SMCJ15CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ15CH 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 SMCJ15CH?
For technical support, including SMCJ15CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ15CH requirements.
6.How does Aetrix verify that SMCJ15CH is sourced from the original manufacturer or authorized distributors?
All SMCJ15CH 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 SMCJ15CH meets industry standards.
7.What is the process for return or replacement of SMCJ15CH?
All SMCJ15CH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ15CH, 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 SMCJ15CH part is unused and in its original packaging.
Return procedure for SMCJ15CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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