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Taiwan Semiconductor Corporation SMCJ15
- Part No.:
- SMCJ15
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ15.pdf
- Description:
- 1500W, 18.6V, 10%, UNIDIRECTIONA
- Quantity:
- Payment:
- Shipping:
Inventory:2,976
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Product details
Overview
SMCJ15 from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 15 V working stand-off voltage (VWM), 16.7–20.4 V breakdown voltage (VBR), and 26.9 V maximum clamping voltage (VC) at 58 A peak pulse current - designed for automotive load-dump and inductive switching surge protection in power supply rails and I/O interfaces.
For engineers reviewing the SMCJ15 datasheet, SMCJ15 pinout, SMCJ15 application, or SMCJ15 equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, junction temperature derating above 25°C, thermal resistance (RθJA = 55°C/W), and compatibility with automated SMT placement on industrial control PCBs.
Technical Context
The SMCJ15 employs a glass-passivated silicon junction optimized for sub-nanosecond response (<1.0 ps from 0 V to VBR min) and low leakage (<1 µA at 15 V). Its unidirectional configuration provides forward conduction capability with VF = 3.5 V at 100 A, enabling bidirectional surge suppression when paired with complementary devices or used in DC-biased circuits.
Thermally, it supports continuous operation up to TJ = 150°C, with RθJC = 10°C/W enabling effective heatsinking through the cathode tab. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for high-reliability embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 16.7 / 20.4 V @ 1 mA - Ensures reliable turn-on margin above VWM with production tolerance |
| VC @ IPPM | 26.9 V @ 58 A - Limits downstream voltage stress during 10/1000 µs transients per REA standard |
| PPK | 1500 W - Peak pulse power handling for single-event surges without failure |
| IR @ VWM | <1 µA - Negligible leakage current preserves battery life and signal integrity in standby |
| TJ max | +150°C - Enables use in under-hood automotive and industrial environments with ambient up to +125°C |
| RθJA | 55°C/W - Defines required PCB copper area and thermal vias for safe power dissipation at rated PPK |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, single-ended cathode-band marked case. Matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance. Polarity indicated by molded cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to protected circuit ground or low-side reference; carries full surge current during clamping |
| Cathode | Clamping voltage reference / Surge sink node | Connected to power rail or signal line being protected; defines clamping threshold relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR over lifetime and humidity exposure, critical for automotive-grade reliability |
| ISO 7637-2 compliance | Validated against Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (ESD-like fast edges) |
| Fast response time <1.0 ps | Clamps before sensitive ICs experience overstress - essential for protecting CAN/LIN transceivers and microcontrollers |
| Moisture sensitivity level 1 | No bake requirement prior to reflow; compatible with standard SMT assembly lines without special handling |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS directives for environmentally constrained applications |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Suppressing load-dump transients (up to 120 V, 400 ms) on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp surges before LDOs and MCU power inputs. Use Value: Limits rail voltage to ≤26.9 V during 1500 W pulses, preventing damage to 3.3 V/5 V logic supplies and ensuring ASIL-B functional safety compliance. | Use Scenario: Protecting 24 V digital input channels in programmable logic controllers from field-wiring induced transients and relay coil kickback. IC Role / Device Role / Timing Role: Standoff-connected TVS across input terminals to shunt energy from inductive loads (e.g., solenoids, contactors) into common ground. Use Value: Withstands repeated 10/1000 µs surges up to 58 A while maintaining <1 µA leakage - preserving input threshold accuracy and reducing false triggering. |
| LED Driver Output Protection | DC-DC Converter Input Stage |
Use Scenario: Safeguarding constant-current LED driver outputs against accidental short-to-battery or ESD events in streetlight and signage systems. IC Role / Device Role / Timing Role: TVS connected anode-to-ground, cathode-to-output, clamping reverse polarity faults and fast transients before driver FETs. Use Value: Sub-ns response ensures clamping occurs before driver IC internal gate oxide breakdown, extending MTBF beyond 100,000 hours. | Use Scenario: Front-end surge suppression on buck converter inputs subjected to conducted noise from motor drives and variable-frequency inverters. IC Role / Device Role / Timing Role: Primary transient limiter ahead of input EMI filter and bulk capacitor, absorbing energy before upstream ESD diodes or MOVs activate. Use Value: 1500 W PPK rating handles repetitive 10/1000 µs pulses without degradation, supporting >100,000 surge cycles per MIL-STD-883H Method 3015.8. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15A | Lower PPK (600 W), smaller SMB package (DO-214AA), tighter VBR tolerance (16.7–18.5 V) | Not suitable for ISO 7637-2 Pulse 1; limited to lower-energy ESD and EFT events | Select SMCJ15 when 1500 W surge immunity and automotive load-dump compliance are mandatory |
| 1.5KE15A | Through-hole TO-218 package, same VWM/VBR/VC specs, but slower response (>1 ns) and higher RθJA (65°C/W) | Requires manual insertion or wave soldering; unsuitable for high-density SMT layouts | Choose SMCJ15 for automated SMT production, space-constrained boards, and faster clamping performance |
Compared with SMBJ15A and 1.5KE15A, the SMCJ15 delivers 2.5× higher peak power handling in a surface-mount footprint with sub-nanosecond response - making it the preferred choice for automotive and industrial designs requiring robust, automated, and thermally efficient transient suppression.
Availability
SMCJ15 is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, LED lighting drivers, and DC-DC converter input stages requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SMCJ15 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 TVS diodes, rectifiers, MOSFETs, and power management components.
The SMCJ series is part of TSC's high-power transient suppression product line, engineered specifically for automotive ISO 7637-2 and industrial IEC 61000-4-5 compliance with emphasis on SMT manufacturability and thermal robustness.
FAQ
What is the maximum clamping voltage of the SMCJ15 under standard test conditions?
The SMCJ15 has a maximum clamping voltage (VC) of 26.9 V at 58 A peak pulse current (IPPM) using the 10/1000 µs waveform defined in REA standards. This value is measured at TA = 25°C and represents the upper limit of voltage seen by downstream circuitry during worst-case transient events. The SMCJ15 maintains this clamping performance across its qualified operating temperature range.
Is the SMCJ15 suitable for bidirectional transient protection?
No - the SMCJ15 is a unidirectional TVS diode intended for DC-biased applications where reverse polarity is not expected. For true bidirectional protection, select the SMCJ15CA variant (with 'CA' suffix), which features symmetrical breakdown in both directions. Using the SMCJ15 in AC or floating applications risks failure due to forward conduction during negative half-cycles.
Does the SMCJ15 require derating at elevated ambient temperatures?
Yes - the SMCJ15 must be derated above TA = 25°C per Figure 2 in the datasheet. At 85°C ambient, its peak pulse power drops to approximately 750 W (50% of 1500 W), and at 125°C, it falls to ~300 W. Proper PCB thermal design - including copper pour, thermal vias, and proximity to ground planes - is essential to maintain effective derating margins for the SMCJ15 in real-world deployments.
What is the forward voltage drop of the SMCJ15 during high-current surge events?
The SMCJ15 exhibits a forward voltage (VF) of 3.5 V at 100 A, as specified for unidirectional devices in the SMCJ5.0–SMCJ90 family. This parameter applies only during forward conduction (e.g., reverse-polarity fault conditions) and confirms the device's ability to safely conduct large inrush currents without thermal runaway. The SMCJ15 leverages this characteristic to protect against both surge and miswiring events.
How does the SMCJ15 compare to the SMCJ15A in terms of electrical performance?
The SMCJ15A offers tighter breakdown voltage tolerance (16.7–18.5 V vs. 16.7–20.4 V for SMCJ15) and slightly lower clamping voltage (24.4 V vs. 26.9 V at 64 A), resulting in improved protection margin for precision-sensitive circuits. Both share identical package (DO-214AB), power rating (1500 W), and thermal specs. The SMCJ15A is recommended when tighter VBR control and lower VC are prioritized over cost or legacy design compatibility.
SMCJ15 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:
- 1
- Bidirectional Channels:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ15 FAQ
1.How can I place an order for SMCJ15 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ15 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 SMCJ15 reliable?
The price and inventory of SMCJ15 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ15 is usually 5 days.
3.What payment methods are accepted for SMCJ15?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ15 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ15?
SMCJ15 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ15 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 SMCJ15?
For technical support, including SMCJ15 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ15 requirements.
6.How does Aetrix verify that SMCJ15 is sourced from the original manufacturer or authorized distributors?
All SMCJ15 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 SMCJ15 meets industry standards.
7.What is the process for return or replacement of SMCJ15?
All SMCJ15 units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ15, 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 SMCJ15 part is unused and in its original packaging.
Return procedure for SMCJ15:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ15 Tags
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