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Taiwan Semiconductor Corporation SMCJ26CH
- Part No.:
- SMCJ26CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26CH.pdf
- Description:
- 1500W, 32.1V, 10%, BIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:8,650
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Product details
Overview
SMCJ26CH from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 26V working stand-off voltage (VWM), 28.9–35.3V breakdown voltage (VBR), and 46.6V maximum clamping voltage (VC) at 33A peak pulse current - designed for automotive-grade ESD and load-switching surge protection in power supply rails and signal lines.
For engineers reviewing the SMCJ26CH datasheet, SMCJ26CH pinout, SMCJ26CH application, or SMCJ26CH equivalent, this device delivers AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1ps response time, <1μA leakage above 10V, and glass-passivated junction reliability in surface-mount automotive and industrial systems.
Technical Context
The SMCJ26CH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (28.9–35.3V @ 1mA); it clamps transients to ≤46.6V at 33A (10/1000μs waveform), dissipating up to 1500W peak power with thermal resistance RθJC = 10°C/W and RθJA = 55°C/W.
Its DO-214AB (SMC) package features matte tin-plated leads, JESD201 Class 2 whisker resistance, UL 94V-0 molding compound, and polarity marked by cathode band - optimized for automated placement and reflow soldering in high-reliability PCB assemblies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 28.9 V / 35.3 V @ 1 mA - guaranteed avalanche initiation range under standardized test conditions |
| VC @ IPPM | 46.6 V @ 33 A - clamped voltage during 10/1000μs surge, defining worst-case downstream voltage stress |
| PPK | 1500 W - peak pulse power handling capability per single non-repetitive transient event |
| IR @ VWM | <1 μA - negligible leakage current at rated stand-off voltage, minimizing standby power loss |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Response time | <1.0 ps - ultrafast junction response ensures protection before sensitive ICs experience overvoltage damage |
Pinout & Package
DO-214AB (SMC) surface-mount package: cathode-marked monolithic silicon junction diode with two terminals - anode (unmarked end) and cathode (banded end). Leads are matte tin-plated, compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected circuit (e.g., GND or return path) |
| Cathode | Avalanche clamping terminal | Connected to higher-potential line (e.g., 24V rail or signal input) - polarity critical for unidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, UHAST, and ESD-HBM/MM |
| ISO 7637-2 compliance | Withstands defined automotive transient pulses (Pulse 1, 2a, 2b, 3a, 3b) without degradation or failure |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives |
| Sub-1ps response time | Enables clamping before ESD or fast-edge transients propagate into downstream logic or analog circuitry |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS directives for environmentally constrained manufacturing and end-of-life handling |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24V battery-fed ECUs, body control modules, and lighting drivers from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges exceeding 26V. Use Value: Limits rail voltage to ≤46.6V during 33A transients, preventing damage to 36V-rated DC-DC converters and microcontrollers. | Use Scenario: Safeguarding analog inputs of PLC I/O modules exposed to field-wiring induced surges in factory automation. IC Role / Device Role / Timing Role: Front-end transient suppressor on 4–20mA or 0–10V sensor signal lines referenced to system ground. Use Value: Sub-1ps response prevents latch-up or input-stage breakdown in precision op-amps and ADC front-ends during ESD events. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding PoE-powered network switches and base stations from lightning-induced surges on 48V DC input ports. IC Role / Device Role / Timing Role: Primary clamping device on DC input before bulk capacitance and upstream DC-DC stage. Use Value: 1500W peak power rating handles multi-kA surge currents while maintaining low clamping voltage across wide temperature range. | Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., washing machine drive circuits). IC Role / Device Role / Timing Role: Reverse-biased across motor terminals to absorb flyback energy during MOSFET turn-off. Use Value: 200A peak forward surge rating (IFSM) accommodates repeated commutation spikes without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26A | 600W rating, SMB package (smaller footprint), lower IPPM (17.3A), higher VC (42.1V) | Better suited for space-constrained consumer PCBs where 1500W surge margin is not required | Select SMBJ26A only if board area is critical and peak surge exposure is limited to <600W |
| SMCJ26A | Same DO-214AB package and 1500W rating, but bidirectional configuration (CH suffix denotes unidirectional; A suffix indicates tighter VBR tolerance) | Required only when bidirectional protection (e.g., AC-coupled data lines) is needed instead of DC rail clamping | SMCJ26A is not a drop-in replacement - polarity and directionality differ; verify circuit topology before substitution |
Compared with SMCJ26CH, SMBJ26A offers reduced surge capacity in a smaller package, while SMCJ26A provides identical power handling but bidirectional clamping - neither matches the exact unidirectional, AEC-Q101-qualified, ISO 7637-2-compliant profile of SMCJ26CH for automotive power rail use.
Availability
SMCJ26CH is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply with AEC-Q101 qualification and ISO 7637-2 compliance.
Supply support for SMCJ26CH 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 automotive-qualified components.
The SMCJ series was developed specifically for high-energy transient suppression in harsh automotive and industrial environments, emphasizing AEC-Q101 reliability, fast response, and robust clamping performance.
FAQ
What is the polarity configuration of the SMCJ26CH?
The SMCJ26CH is a unidirectional TVS diode with cathode indicated by a band on the DO-214AB package. It conducts in forward bias like a standard diode and clamps reverse transients above its breakdown voltage. Correct orientation is essential: cathode connects to the protected line (e.g., 24V rail), anode to ground. Reversal renders it ineffective against negative-going transients.
Does the SMCJ26CH meet AEC-Q101 requirements for automotive use?
Yes, the SMCJ26CH is explicitly AEC-Q101 qualified per the manufacturer's documentation. It has undergone stress testing including high-temperature operating life (HTOL), temperature cycling (TC), unbiased highly accelerated stress test (UHAST), and human-body model (HBM) ESD - confirming suitability for under-hood and chassis-mounted automotive electronics.
What is the maximum clamping voltage of the SMCJ26CH and at what current is it specified?
The SMCJ26CH has a maximum clamping voltage (VC) of 46.6 V, measured at a peak pulse current (IPPM) of 33 A using the standardized 10/1000 μs double-exponential waveform. This value defines the upper voltage limit imposed on the protected circuit during worst-case transient events.
How does the SMCJ26CH compare to the SMCJ26AH variant?
The SMCJ26CH and SMCJ26AH share identical package, power rating (1500W), and VWM (26V), but differ in breakdown voltage tolerance: SMCJ26CH has VBR = 28.9–35.3 V, while SMCJ26AH tightens the range to 28.9–31.9 V. The "A" suffix indicates tighter VBR distribution, beneficial for designs requiring precise clamping threshold control.
Is the SMCJ26CH compatible with lead-free reflow soldering processes?
Yes, the SMCJ26CH uses matte tin-plated leads compliant with J-STD-002 solderability standards and supports standard lead-free reflow profiles (e.g., JEDEC J-STD-020). Its DO-214AB package withstands peak temperatures up to 260°C for 30 seconds, matching common Pb-free assembly requirements.
SMCJ26CH 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):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 46.6V
- Current - Peak Pulse (10/1000µs):
- 33A
- 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)
SMCJ26CH FAQ
1.How can I place an order for SMCJ26CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26CH 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 SMCJ26CH reliable?
The price and inventory of SMCJ26CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ26CH is usually 5 days.
3.What payment methods are accepted for SMCJ26CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26CH?
SMCJ26CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26CH 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 SMCJ26CH?
For technical support, including SMCJ26CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26CH requirements.
6.How does Aetrix verify that SMCJ26CH is sourced from the original manufacturer or authorized distributors?
All SMCJ26CH 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 SMCJ26CH meets industry standards.
7.What is the process for return or replacement of SMCJ26CH?
All SMCJ26CH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26CH, 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 SMCJ26CH part is unused and in its original packaging.
Return procedure for SMCJ26CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ26CH Tags
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