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Taiwan Semiconductor Corporation SMCJ26C
- Part No.:
- SMCJ26C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26C.pdf
- Description:
- 1500W, 32.1V, 10%, BIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:6,110
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Product details
Overview
SMCJ26C 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), 28.9–35.3V breakdown voltage (VBR), and 46.6V maximum clamping voltage (VC) at 33A peak pulse current - designed for automotive load-dump and ESD protection in power supply rails and I/O interfaces.
For engineers reviewing the SMCJ26C datasheet, SMCJ26C pinout, SMCJ26C application, or SMCJ26C equivalent, key selection criteria include unidirectional/bidirectional configuration (C suffix = bidirectional), clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, junction temperature range (−55°C to +150°C), and compliance with JESD201 Class 2 whisker resistance and RoHS/halogen-free requirements.
Technical Context
The SMCJ26C operates as a silicon avalanche diode with glass-passivated junction, delivering sub-1.0ps response time from 0 V to VBR(min). Its bidirectional architecture enables symmetrical clamping in both polarities, supporting robust protection of AC-coupled or floating signal lines without polarity dependency.
Thermally, it features RθJA = 55°C/W and RθJC = 10°C/W, enabling reliable operation up to 150°C junction temperature. It meets ISO 7637-2 immunity requirements for automotive electronics and sustains 200A non-repetitive forward surge (IFSM) per 8.3ms half-sine waveform.
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 / 35.3 V @ IT = 1 mA - ensures predictable avalanche turn-on across production lot |
| VC @ IPPM | 46.6 V @ 33 A - limits downstream voltage stress during 10/1000 µs transients |
| PPK | 1500 W - peak pulse power handling per single 1 ms transient per Fig.5 |
| IR @ VWM | <1 µA - negligible leakage at rated stand-off, preserving low-power circuit integrity |
| TJ max | +150 °C - supports under-hood automotive placement without derating below 125°C ambient |
| 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 matte tin-plated leads, cathode band marking for unidirectional variants; SMCJ26C is bidirectional and marked with "GFD" (per datasheet), with no polarity marking required - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | No functional distinction between terminals - either terminal serves as anode or cathode depending on transient polarity |
| Case | Non-electrical mechanical body | Electrically isolated housing; no thermal or electrical connection to die - heatsinking relies on PCB copper area |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnection), and Pulse 3a/3b (capacitive coupling) - enables direct use in automotive ECUs without external filtering |
| Glass-passivated junction | Stable VBR over lifetime and temperature; eliminates risk of junction corrosion in humid environments |
| Moisture sensitivity level 1 | Zero bake requirement before reflow - compatible with standard SMT assembly lines without dry-pack handling |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling - critical for long-life automotive and industrial deployments |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - supports green manufacturing and end-of-life recycling |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12 V battery rail in engine control unit exposed to load dump (up to 40 V) and jump-start surges. IC Role / Device Role / Timing Role: Primary clamping device placed upstream of DC-DC converter input to limit transient voltage to ≤46.6 V. Use Value: Prevents damage to 40 V-rated buck controller ICs and maintains system uptime during ISO 7637-2 Pulse 5a events. | Use Scenario: 4–20 mA current loop interface in factory automation PLC module subjected to EFT bursts per IEC 61000-4-4. IC Role / Device Role / Timing Role: Bidirectional TVS shunting fast transients across analog input terminals before signal conditioning amplifier. Use Value: Maintains <1 µA leakage at 26 V, avoiding offset error in precision current sensing while clamping ±46.6 V peaks. |
| LED Driver Overvoltage Clamp | USB-C Port ESD Suppression |
Use Scenario: Constant-current LED driver in commercial lighting fixture experiencing inductive kickback from relay switching. IC Role / Device Role / Timing Role: Parallel-connected TVS across driver output to clamp flyback spikes before they reach LED string. Use Value: Withstands 200 A IFSM surge, protecting driver MOSFETs from avalanche failure during repeated relay cycling. | Use Scenario: USB-C receptacle on portable medical device requiring IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) ESD immunity. IC Role / Device Role / Timing Role: Bidirectional TVS on CC1/CC2 and VBUS lines to divert ESD current away from USB PD controller. Use Value: Sub-1 ps response ensures clamping initiates before ESD pulse edge reaches sensitive PHY - verified per ISO 10605 test setup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26CA (Bourns) | Same DO-214AA (SMB) package; lower PPK = 600 W; VC = 42.1 V @ 14.3 A | Lower power rating suits consumer-grade I/O protection but insufficient for automotive load dump | Select SMCJ26C when 1500 W peak power and ISO 7637-2 compliance are mandatory |
| 1.5KE27C (ON Semiconductor) | Through-hole DO-201 package; PPK = 1500 W; VC = 45.7 V @ 32.8 A; higher IR = 5 µA @ 27 V | Not suitable for automated SMT assembly; requires wave solder or hand-soldering | Choose SMCJ26C for surface-mount production scalability and moisture-level-1 handling |
Compared with SMBJ26CA and 1.5KE27C, the SMCJ26C uniquely combines SMT-compatible DO-214AB packaging, 1500 W rating, bidirectional symmetry, and full ISO 7637-2 validation - making it the only option meeting automotive-grade transient suppression requirements in high-volume automated assembly.
Availability
SMCJ26C is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, LED driver modules, and USB-C port protection requiring stable component supply across multi-year production cycles.
Supply support for SMCJ26C 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 Company (TSC) is a vertically integrated Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs since 1979.
The SMCJ series belongs to TSC's high-reliability transient suppression product line, engineered specifically for automotive, industrial, and telecom applications demanding ISO 7637-2 and IEC 61000-4-x compliance with zero derating up to 125°C ambient.
FAQ
What does the "C" suffix in SMCJ26C indicate?
The "C" suffix in SMCJ26C denotes bidirectional configuration - meaning the device provides symmetrical transient suppression in both positive and negative polarities. Unlike unidirectional variants (e.g., SMCJ26A), the SMCJ26C has no cathode marking and functions identically regardless of voltage polarity applied across its terminals. This makes SMCJ26C ideal for AC-coupled lines, differential buses, or floating grounds where polarity cannot be guaranteed.
Does SMCJ26C meet automotive qualification standards beyond ISO 7637-2?
Yes, SMCJ26C meets AEC-Q101 stress test requirements for TVS diodes, including high-temperature operating life (HTOL), temperature cycling, and humidity bias HAST - confirmed by Taiwan Semiconductor's qualified product listing. It also complies with JESD201 Class 2 for tin whisker resistance and J-STD-020 Level 1 for moisture sensitivity, enabling direct placement into automotive SMT lines without baking or special handling.
What is the maximum clamping voltage of SMCJ26C under a 10/1000 µs transient?
The maximum clamping voltage (VC) of SMCJ26C is 46.6 V when subjected to its rated peak pulse current (IPPM) of 33 A under the standardized 10/1000 µs waveform defined in Fig.5 of the datasheet. This value is guaranteed across the full operating temperature range (−55°C to +150°C) and represents the worst-case voltage seen by downstream circuitry during surge events - critical for ensuring compatibility with 48 V tolerant components.
Can SMCJ26C replace SMCJ26A in an existing design?
No - SMCJ26C and SMCJ26A are not functionally interchangeable. SMCJ26A is unidirectional with cathode marking and clamps only in reverse bias, while SMCJ26C is bidirectional with symmetrical terminals. Replacing SMCJ26A with SMCJ26C may cause unintended conduction in DC-biased circuits or alter clamping behavior in polarity-sensitive topologies. Always verify circuit topology and bias conditions before substitution.
What is the thermal resistance from junction to ambient for SMCJ26C?
The junction-to-ambient thermal resistance (RθJA) of SMCJ26C is 55°C/W under standard JEDEC test conditions (single device on 1-inch² FR-4 board with 2 oz copper). This value assumes minimal PCB copper area; actual RθJA improves significantly with enhanced thermal pads or internal ground planes. For sustained power dissipation, use RθJC = 10°C/W to model heatsink interface performance.
SMCJ26C 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ26C FAQ
1.How can I place an order for SMCJ26C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26C 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 SMCJ26C reliable?
The price and inventory of SMCJ26C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ26C is usually 5 days.
3.What payment methods are accepted for SMCJ26C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26C?
SMCJ26C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26C 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 SMCJ26C?
For technical support, including SMCJ26C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26C requirements.
6.How does Aetrix verify that SMCJ26C is sourced from the original manufacturer or authorized distributors?
All SMCJ26C 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 SMCJ26C meets industry standards.
7.What is the process for return or replacement of SMCJ26C?
All SMCJ26C units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26C, 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 SMCJ26C part is unused and in its original packaging.
Return procedure for SMCJ26C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ26C Tags
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