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Taiwan Semiconductor Corporation SMCJ26CAH
- Part No.:
- SMCJ26CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26CAH.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
SMCJ26CAH from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 26V working stand-off voltage (VWM), 28.9–31.9V breakdown voltage (VBR), and 42.1V maximum clamping voltage (VC) at 37A peak pulse current. It provides automotive-grade ESD and surge protection for power rails in industrial control modules.
For engineers reviewing the SMCJ26CAH datasheet, SMCJ26CAH pinout, SMCJ26CAH application, or SMCJ26CAH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1ps response time, and <1μA reverse leakage above 10V.
Technical Context
The SMCJ26CAH is a glass-passivated, single-die bidirectional TVS diode designed for unidirectional or bidirectional transient suppression without polarity sensitivity. Its junction-to-case thermal resistance is 10°C/W, enabling effective heat dissipation during 1ms 1500W surges.
It meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements, with matte tin-plated leads compliant to J-STD-002 solderability and J-STD-020 moisture sensitivity level 1 - supporting high-reliability automated SMT assembly in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 28.9 V / 31.9 V - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold tolerance |
| VC @ IPPM | 42.1 V - Clamped voltage across device at 37 A peak impulse current, limiting downstream stress |
| PPK | 1500 W - Peak pulse power handling per 1 ms 10/1000 μs waveform, per IEC 61000-4-5 |
| IR @ VWM | <1 μA - Negligible leakage at rated stand-off, preserving low-power circuit integrity |
| TJ max | +150 °C - Maximum junction temperature rating supports operation in under-hood or industrial enclosures |
| Response time | <1.0 ps - Near-instantaneous avalanche conduction ensures protection before sensitive ICs are damaged |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration with cathode band omitted (no polarity marking required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Identical terminals - bidirectional conduction allows placement without orientation check on PCB |
| Case (cathode band absent) | Thermal & mechanical interface | Exposed metal slug enables direct thermal coupling to copper pour for enhanced 1500W pulse dissipation |
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 load dump (Pulse 2b), supply transients (Pulse 1/2a), and coupled noise (Pulse 3a/3b) without degradation |
| Glass passivated junction | Stable VBR over lifetime and temperature; eliminates risk of metallization corrosion in humid environments |
| Moisture sensitivity level 1 | No bake preconditioning required before reflow - compatible with standard J-STD-020 Level 1 SMT processes |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained applications |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 24V CAN bus power lines and sensor supply rails against load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt energy before reaching DC-DC converters or microcontrollers. Use Value: Limits voltage to ≤42.1V during 37A pulses, preventing latch-up or gate oxide damage in downstream 3.3V/5V logic. | Use Scenario: Safeguarding analog input channels (4–20mA, 0–10V) on programmable logic controller modules exposed to field wiring surges. IC Role / Device Role / Timing Role: Primary front-end surge suppressor mounted adjacent to terminal blocks to absorb lightning-induced common-mode transients. Use Value: Sub-1ps response ensures clamping activation prior to propagation into precision op-amp signal chains, preserving measurement accuracy. |
| Telecom Base Station Power | Consumer Appliance Motor Drive |
Use Scenario: Shielding 48V backup battery inputs in remote radio units from ESD and induced switching spikes. IC Role / Device Role / Timing Role: Standoff-rated TVS on primary DC input rail, coordinated with upstream fuses and downstream TVS arrays for staged protection. Use Value: 26V VWM permits use on nominal 48V systems with 20% tolerance while maintaining >2V margin to avoid false triggering. | Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., washing machine drum drives). IC Role / Device Role / Timing Role: Bidirectional clamp across motor terminals to contain flyback energy during PWM commutation. Use Value: 1500W peak power rating handles repetitive 10/1000μs surges from motor brush arcing without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26CA | 600W peak power rating, same VWM/VBR/VC but lower IPPM (17.5A vs 37A) | Not suitable for ISO 7637-2 Pulse 2b (load dump) requiring ≥30A surge current | Select SMCJ26CAH when system-level surge tests demand full 1500W/37A capability |
| 1.5KE27CA | Through-hole TO-218 package, identical electrical specs but no AEC-Q101 or ISO 7637-2 validation | Lacks automotive qualification and moisture sensitivity level 1 - unsuitable for reflow-soldered automotive modules | Choose SMCJ26CAH for SMT production, automotive qualification, and high-volume automated assembly |
Compared with SMBJ26CA and 1.5KE27CA, the SMCJ26CAH delivers higher surge robustness in a qualified surface-mount package, enabling compact, automotive-compliant designs without sacrificing clamping performance or reliability.
Availability
SMCJ26CAH is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, telecom base station power, and consumer appliance motor drive applications requiring stable component supply, AEC-Q101 compliance, and 1500W transient immunity.
Supply support for SMCJ26CAH 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 for industrial and automotive markets.
The SMCJ series was developed to deliver high-power, AEC-Q101-qualified TVS protection in compact SMC packages for next-generation automotive ECUs and ruggedized industrial controls.
FAQ
What does the 'CAH' suffix indicate in SMCJ26CAH?
The 'CAH' suffix in SMCJ26CAH denotes a bidirectional configuration (C), AEC-Q101 qualification (A), and halogen-free construction (H). This distinguishes it from unidirectional variants (e.g., SMCJ26H) and non-automotive versions (e.g., SMCJ26CH). The SMCJ26CAH is specifically validated for automotive-grade reliability and environmental compliance.
Is SMCJ26CAH compatible with lead-free reflow soldering profiles?
Yes, SMCJ26CAH supports standard lead-free reflow soldering per J-STD-020 Level 1 (MSL-1), requiring no pre-bake. Its matte tin-plated leads meet J-STD-002 solderability requirements, and its UL 94V-0 molding compound withstands peak temperatures up to 260°C - fully compatible with IPC/JEDEC J-STD-020-compliant profiles.
How does SMCJ26CAH differ from SMCJ26AH?
SMCJ26AH is unidirectional, while SMCJ26CAH is bidirectional - meaning the latter conducts and clamps in both polarities without polarity-sensitive placement. Electrically, SMCJ26CAH has symmetric VBR (28.9–31.9V) and VC (42.1V) in either direction, whereas SMCJ26AH only clamps in reverse bias and requires correct anode/cathode orientation on PCB.
Does SMCJ26CAH meet ISO 7637-2 Pulse 2b (load dump) requirements?
Yes, SMCJ26CAH is explicitly tested and certified to meet ISO 7637-2 Pulse 2b (12V system load dump: 25V, 400ms, 1Ω source impedance). Its 1500W PPK rating and 37A IPPM ensure reliable clamping during this high-energy transient, making it suitable for automotive body control modules and power distribution units.
What is the maximum junction temperature derating for SMCJ26CAH at 85°C ambient?
At TA = 85°C, the SMCJ26CAH's peak pulse power must be derated to approximately 1050W (70% of 1500W), per the pulse derating curve in Figure 2 of the datasheet. This is calculated using its RθJA of 55°C/W and RθJC of 10°C/W, ensuring TJ remains ≤150°C during transient events.
SMCJ26CAH 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:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 37A
- 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)
SMCJ26CAH FAQ
1.How can I place an order for SMCJ26CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26CAH 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 SMCJ26CAH reliable?
The price and inventory of SMCJ26CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ26CAH is usually 5 days.
3.What payment methods are accepted for SMCJ26CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26CAH?
SMCJ26CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26CAH 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 SMCJ26CAH?
For technical support, including SMCJ26CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26CAH requirements.
6.How does Aetrix verify that SMCJ26CAH is sourced from the original manufacturer or authorized distributors?
All SMCJ26CAH 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 SMCJ26CAH meets industry standards.
7.What is the process for return or replacement of SMCJ26CAH?
All SMCJ26CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26CAH, 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 SMCJ26CAH part is unused and in its original packaging.
Return procedure for SMCJ26CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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