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Taiwan Semiconductor Corporation SMCJ24C
- Part No.:
- SMCJ24C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ24C.pdf
- Description:
- 1500W, 29.7V, 10%, BIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:5,651
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Product details
Overview
SMCJ24C from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 24V working stand-off voltage (VWM), 26.7–32.6V breakdown voltage (VBR), and 43.0V maximum clamping voltage (VC) at 36A peak pulse current-designed for automotive ESD and load-dump protection in power supply rails and CAN/LIN interfaces.
For engineers reviewing the SMCJ24C datasheet, SMCJ24C pinout, SMCJ24C application, or SMCJ24C equivalent, this page delivers verified electrical specs, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance status, thermal resistance values (RθJA = 55°C/W), moisture sensitivity level (MSL 1), and real-world clamping performance under 10/1000μs surge waveforms.
Technical Context
The SMCJ24C is a bipolar (bidirectional) TVS diode optimized for fast transient suppression without polarity constraints-its symmetrical VBR min/max (26.7V/32.6V) and identical clamping behavior in both directions enable robust protection of differential signal lines and AC-coupled circuits. It meets ISO 7637-2 Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnection & coupling), and Pulse 3a/3b (capacitive discharge) test profiles.
With <1.0ps response time from 0V to VBRmin, sub-1μA reverse leakage above 10V, and junction temperature range of –55°C to +150°C, the SMCJ24C supports high-reliability operation in under-hood automotive modules, industrial PLC I/O ports, and DC power distribution networks where sustained thermal dissipation (PD = 5W) and low RθJC = 10°C/W are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin below system rail (e.g., 24V nominal bus) |
| VBR @ IT=1mA | 26.7–32.6 V - Confirmed breakdown threshold at 1mA test current; ensures predictable turn-on during transients |
| VC @ IPPM=36A | 43.0 V - Clamped voltage under 10/1000μs surge; limits downstream IC stress to ≤43V during 1500W events |
| PPK | 1500 W - Peak pulse power rating per single 1ms waveform; defines energy-handling capability per IEC 61000-4-5 Level 4 |
| RθJA | 55 °C/W - Junction-to-ambient thermal resistance; enables derated power handling up to ~3.5W at 85°C ambient |
| IR @ VWM | <1 μA - Reverse leakage at 24V; negligible standby current impact on battery-powered systems |
| TJ max | +150 °C - Maximum junction temperature; supports operation in engine control units and motor drives |
Pinout & Package
DO-214AB (SMC) surface-mount package: molded epoxy case rated UL 94V-0, matte tin-plated leads compliant with J-STD-002 solderability, polarity indicated by cathode band (bidirectional function renders band non-polarized; used only for marking consistency).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bidirectional transient conduction path | Identical clamping in both directions; no polarity dependency-connects across protected line and return without orientation check |
| Case | Thermal and mechanical interface | Exposed copper pad required per suggested layout; provides primary heat path to PCB copper for RθJC=10°C/W performance |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR over lifetime and humidity exposure; eliminates parameter drift in humid environments (e.g., automotive cabin modules) |
| ISO 7637-2 compliance | Validated against Pulse 1 (–150V/0.5Ω), Pulse 2a (+100V/2Ω), Pulse 2b (–100V/2Ω), Pulse 3a/3b (±300V); qualifies for OEM automotive qualification programs |
| MSL 1 rating | Zero floor life limitation-no baking required prior to reflow; compatible with standard SMT assembly lines without moisture-sensitive handling |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU; supports green manufacturing and end-of-life recycling requirements |
| Fast response & low IR | <1.0ps turn-on and <1μA leakage at VWM enable protection of high-speed analog sensors and low-power microcontrollers without signal distortion or quiescent drain |
Applications
| Automotive Power Rail Protection | CAN/LIN Bus Transient Suppression |
|---|---|
Use Scenario: Protecting 24V battery-fed ECUs from load dump (ISO 7637-2 Pulse 5a) and alternator-induced surges. IC Role / Device Role / Timing Role: Primary clamping device placed at power entry point, shunting >1500W transients within nanoseconds. Use Value: Limits rail voltage to ≤43V during 100V/10Ω load dump events, preventing damage to 36V-rated DC-DC converters and MCU power supplies. | Use Scenario: Safeguarding CAN FD transceivers (e.g., TJA1044) against ESD and coupled noise on vehicle wiring harnesses. IC Role / Device Role / Timing Role: Bidirectional shunt element across CAN_H/CAN_L differential pair, symmetrically clamping ±43V peaks. Use Value: Maintains signal integrity by clamping transients before they exceed transceiver common-mode range (–27V to +40V), avoiding bus lockup. |
| Industrial PLC Digital I/O Protection | LED Driver Output Stage Protection |
Use Scenario: Shielding 24V digital input channels from inductive kickback when switching solenoids or relays. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing 10/1000μs inductive spikes generated by 24V coil de-energization. Use Value: Prevents latch-up in optocoupler input stages by limiting voltage overshoot to 43V-well below 60V absolute maximum ratings. | Use Scenario: Protecting constant-current LED driver outputs (e.g., LM3409) from output short-circuit transients and hot-swap surges. IC Role / Device Role / Timing Role: Clamp device placed between driver output and LED string anode/cathode, suppressing reverse recovery spikes. Use Value: Eliminates LED string failure due to >100V reverse transients by clamping to 43V, preserving driver MOSFET gate oxide 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 |
|---|---|---|---|
| SMBJ24CA (Bourns) | Same DO-214AA (SMB) package; lower PPK = 600W; VBR = 26.7–29.5V; VC = 38.9V @ 15.4A | Lower surge capacity suits consumer-grade 24V systems; not qualified for ISO 7637-2 Pulse 5a | Select SMBJ24CA only if system-level surge energy is ≤600W and automotive qualification is not required. |
| 1.5KE24CA (ON Semiconductor) | DO-201AE (Axial) package; PPK = 1500W; VBR = 25.6–27.9V; VC = 36.0V @ 41.7A; slower response (~1ns) | Through-hole mounting; higher IPPM but larger footprint; lacks MSL 1 and halogen-free certification | Choose 1.5KE24CA for legacy through-hole designs or cost-sensitive industrial boards where reflow compatibility is not needed. |
Compared with SMBJ24CA and 1.5KE24CA, the SMCJ24C delivers superior surge robustness in surface-mount form factor, full ISO 7637-2 coverage, and zero-moisture-handling overhead-making it the preferred choice for new automotive and high-reliability 24V embedded designs.
Availability
SMCJ24C is available at Aetrix Electronics and suitable for automotive ECU power protection, industrial PLC I/O hardening, and LED driver output stage safeguarding requiring stable component supply across multi-year production cycles.
Supply support for SMCJ24C 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-serving automotive, industrial, and computing markets since 1979.
The SMCJ series is part of TSC's high-power TVS platform engineered specifically for ISO 7637-2 and IEC 61000-4-5 compliance in harsh-environment 12V/24V/48V systems-emphasizing repeatable clamping, low leakage, and AEC-Q101 readiness.
FAQ
What is the polarity configuration of the SMCJ24C?
The SMCJ24C is a bidirectional TVS diode, meaning it functions identically in both forward and reverse bias-no anode/cathode orientation is required during placement. Its marking includes a cathode band solely for consistency with unidirectional variants; electrical behavior is symmetrical, making it ideal for protecting AC-coupled signals or differential buses like CAN.
Does the SMCJ24C meet automotive transient immunity standards?
Yes, the SMCJ24C is explicitly validated to meet ISO 7637-2 Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnection and coupling), and Pulse 3a/3b (capacitive discharge) test profiles. It is widely deployed in automotive body control modules and infotainment power supplies where these standardized surge waveforms define design acceptance criteria.
What is the maximum clamping voltage of the SMCJ24C under surge conditions?
The SMCJ24C has a maximum clamping voltage (VC) of 43.0 V at 36 A peak pulse current (IPPM), measured using the standardized 10/1000 μs double-exponential waveform. This value is guaranteed across the full operating temperature range and ensures protected downstream components remain within their absolute maximum voltage ratings during worst-case transients.
Can the SMCJ24C be used in place of a unidirectional SMCJ24A?
No-the SMCJ24C and SMCJ24A are electrically distinct: the "C" suffix denotes bidirectional operation, while "A" indicates unidirectional with cathode-defined polarity. Substituting SMCJ24C for SMCJ24A in a circuit designed for DC-biased clamping may cause unintended conduction during normal operation; always verify schematic polarity and signal topology before replacement.
What is the thermal resistance and power derating behavior of the SMCJ24C?
The SMCJ24C has a junction-to-ambient thermal resistance (RθJA) of 55°C/W and junction-to-case (RθJC) of 10°C/W. Its steady-state power dissipation is rated at 5 W at 25°C ambient, derating linearly to ~3.5 W at 85°C ambient per the published derating curve (Fig.2), enabling reliable operation in enclosed enclosures without forced airflow.
SMCJ24C 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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 43V
- Current - Peak Pulse (10/1000µs):
- 36A
- 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)
SMCJ24C FAQ
1.How can I place an order for SMCJ24C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ24C 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 SMCJ24C reliable?
The price and inventory of SMCJ24C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ24C is usually 5 days.
3.What payment methods are accepted for SMCJ24C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ24C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ24C?
SMCJ24C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ24C 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 SMCJ24C?
For technical support, including SMCJ24C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ24C requirements.
6.How does Aetrix verify that SMCJ24C is sourced from the original manufacturer or authorized distributors?
All SMCJ24C 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 SMCJ24C meets industry standards.
7.What is the process for return or replacement of SMCJ24C?
All SMCJ24C units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ24C, 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 SMCJ24C part is unused and in its original packaging.
Return procedure for SMCJ24C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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