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Taiwan Semiconductor Corporation SMCJ24CH
- Part No.:
- SMCJ24CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ24CH.pdf
- Description:
- 1500W, 29.7V, 10%, BIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,257
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Product details
Overview
SMCJ24CH from Taiwan Semiconductor is a bidirectional 1500W surface-mount 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. It is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and ESD protection.
For engineers reviewing the SMCJ24CH datasheet, SMCJ24CH pinout, SMCJ24CH application, or SMCJ24CH equivalent, this device serves as a robust, unidirectional/bidirectional surge protector in automotive power line conditioning, industrial I/O interface hardening, and telecom DC feed protection where fast response (<1.0 ps), low leakage (<1 µA @ 24V), and high peak power handling are critical.
Technical Context
The SMCJ24CH uses a glass-passivated silicon junction optimized for bidirectional transient suppression, delivering symmetrical clamping behavior in both polarities. Its thermal design features RθJC = 10°C/W and RθJA = 55°C/W, enabling reliable operation up to TJ = 150°C under pulsed conditions.
It complies with JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity, supporting lead-free reflow assembly. The device sustains 200A non-repetitive forward surge (IFSM) and maintains <1 µA reverse leakage above 10V - confirmed for VWM = 24V per electrical specifications table.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 26.7 V / 32.6 V @ IT = 1 mA - Confirmed breakdown range ensuring predictable turn-on margin |
| VC @ IPPM | 43.0 V @ 36 A - Clamping voltage during 10/1000 µs surge, limiting downstream voltage stress |
| PPK | 1500 W - Peak pulse power rating per 1 ms waveform, defining single-event surge capacity |
| IR @ VWM | <1 µA - Ultra-low leakage preserves signal integrity and minimizes standby power loss |
| TJ max | +150 °C - Maximum junction temperature enabling under-hood automotive deployment |
| Package | DO-214AB (SMC) - Industry-standard surface-mount outline with 0.210 g mass and UL 94V-0 molding |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with cathode band marking for polarity identification; matte tin-plated leads compliant with J-STD-002 solderability; bidirectional configuration means no functional anode/cathode distinction - terminals are symmetric and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Bidirectional Surge Terminal | Either terminal accepts transient energy in either polarity; no fixed anode/cathode assignment |
| Terminal 2 | Bidirectional Surge Terminal | Electrically identical to Terminal 1; forms symmetrical clamping path across protected line |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability 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 (line impedance coupling) |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal/humidity stress |
| Fast response time | <1.0 ps rise-to-breakdown ensures clamping activation before sensitive circuitry sustains damage |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive for environmentally constrained applications |
Applications
| Automotive Power Line Protection | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting 24V CAN/LIN bus power rails and sensor supply lines against load dump and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between VBAT and GND, absorbing >1500W transients without failure. Use Value: Enables compliance with ISO 16750-2 and prevents microcontroller reset or regulator latch-up during vehicle cranking events. |
Use Scenario: Hardening PLC digital input modules against field-wiring induced transients and ESD from operator contact. IC Role / Device Role / Timing Role: Primary surge shunt on 24V input channel, placed upstream of optocoupler or level-shifter ICs. Use Value: Limits clamped voltage to ≤43V, keeping input stage MOSFETs and logic ICs within safe SOA during 1 kV/500 A surge events. |
| Telecom DC Feed Protection | Renewable Energy Controller Interface |
Use Scenario: Safeguarding PoE-powered remote radio units and base station control interfaces from lightning-induced surges on 48V DC feeds. IC Role / Device Role / Timing Role: Secondary-level TVS on DC input rail, coordinated with upstream MOVs and gas discharge tubes. Use Value: Provides low-clamping, fast-response backup protection with <1 µA leakage to avoid degrading 48V supply regulation accuracy. |
Use Scenario: Protecting solar charge controller communication ports (RS-485, Modbus) from ground potential differences and lightning coupling. IC Role / Device Role / Timing Role: Bidirectional clamp on differential data lines referenced to local system ground. Use Value: Maintains signal integrity with symmetrical clamping and supports operation across -40°C to +125°C ambient range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24CA | Lower PPK (400W), smaller SMA package, higher VC (43.5V @ 12.3A), same VWM/VBR range | Not suitable for 1500W automotive load dump; limited to lower-energy I/O or signal-line use | Select when board space is constrained and surge energy is ≤400W; verify thermal derating for ambient >75°C |
| SMBJ24CA | PPK = 600W, SMB package, VC = 43.0V @ 19.9A, identical VWM/VBR specs but lower surge rating | Acceptable for industrial control inputs but fails ISO 7637-2 Pulse 1 due to insufficient energy absorption | Choose for cost-sensitive non-automotive designs where 600W peak power suffices and DO-214AB footprint is not required |
Compared with SMAJ24CA and SMBJ24CA, the SMCJ24CH delivers triple the peak power handling (1500W vs. 400W/600W) in the same DO-214AB footprint, enabling direct replacement in high-energy automotive and industrial systems without layout change - while maintaining identical clamping performance and AEC-Q101 qualification.
Availability
SMCJ24CH is available at Aetrix Electronics and suitable for automotive power distribution modules, industrial programmable logic controllers, telecom remote radio units, and renewable energy controller interfaces requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for SMCJ24CH 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 high-reliability protection devices, rectifiers, and TVS diodes for automotive and industrial markets.
The SMCJ series was designed specifically for AEC-Q101-compliant, high-power transient suppression in harsh environments - targeting ISO 7637-2 compliance and under-hood deployment where thermal robustness and surge repeatability are essential.
FAQ
What does the 'CH' suffix indicate in SMCJ24CH?
The 'CH' suffix in SMCJ24CH denotes a bidirectional configuration with a center-tapped or symmetrical junction structure, enabling equal clamping performance in both polarities. Unlike unidirectional variants (e.g., SMCJ24H), the SMCJ24CH has no designated anode or cathode and is marked without a polarity band. This makes it ideal for AC-coupled or floating-line protection where polarity reversal is possible.
Is SMCJ24CH compatible with lead-free reflow soldering processes?
Yes, SMCJ24CH is fully compatible with lead-free reflow soldering per J-STD-002. Its matte tin-plated leads meet solderability requirements, and its DO-214AB package is rated for peak reflow temperatures up to 260°C. The device also conforms to J-STD-020 Level 1 moisture sensitivity, eliminating bake requirements prior to assembly.
How does SMCJ24CH perform under repeated surge stress?
SMCJ24CH is characterized for non-repetitive 1 ms pulses per Fig.5 in the datasheet. While it withstands single 1500W events reliably, repetitive surges require derating per Fig.2 - e.g., at 75°C ambient, peak power drops to ~900W. For cyclic applications, thermal management and duty-cycle limits must be validated using its RθJA = 55°C/W and RθJC = 10°C/W values.
Can SMCJ24CH replace SMCJ24AH in an existing design?
No - SMCJ24CH and SMCJ24AH are functionally distinct. SMCJ24AH is unidirectional with VBR = 26.7–29.5V and VC = 38.9V @ 40A, while SMCJ24CH is bidirectional with VBR = 26.7–32.6V and VC = 43.0V @ 36A. Substituting SMCJ24CH for SMCJ24AH introduces symmetrical clamping but alters clamping voltage and peak current capability; redesign validation is required.
Does SMCJ24CH meet automotive EMC test requirements beyond ISO 7637-2?
SMCJ24CH is explicitly certified to ISO 7637-2 (Pulse 1/2a/2b/3a/3b) per the datasheet. It is not tested or specified for ISO 11452 (radiated immunity) or CISPR 25 (conducted emissions). Its role is transient suppression only - full EMC compliance requires system-level filtering, grounding, and shielding in addition to SMCJ24CH placement near connectors or entry points.
SMCJ24CH 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:
- 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)
SMCJ24CH FAQ
1.How can I place an order for SMCJ24CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ24CH 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 SMCJ24CH reliable?
The price and inventory of SMCJ24CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ24CH is usually 5 days.
3.What payment methods are accepted for SMCJ24CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ24CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ24CH?
SMCJ24CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ24CH 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 SMCJ24CH?
For technical support, including SMCJ24CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ24CH requirements.
6.How does Aetrix verify that SMCJ24CH is sourced from the original manufacturer or authorized distributors?
All SMCJ24CH 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 SMCJ24CH meets industry standards.
7.What is the process for return or replacement of SMCJ24CH?
All SMCJ24CH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ24CH, 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 SMCJ24CH part is unused and in its original packaging.
Return procedure for SMCJ24CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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