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Taiwan Semiconductor Corporation SMCJ26H
- Part No.:
- SMCJ26H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26H.pdf
- Description:
- 1500W, 32.1V, 10%, UNIDIRECTIONA
- Quantity:
- Payment:
- Shipping:
Inventory:7,816
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Product details
Overview
SMCJ26H from Taiwan Semiconductor is a unidirectional 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. It delivers AEC-Q101 qualification and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and ESD protection.
For engineers reviewing the SMCJ26H datasheet, SMCJ26H pinout, SMCJ26H application, or SMCJ26H equivalent, this device is selected for robust overvoltage immunity in 24V automotive power rails, industrial I/O interfaces, and telecom DC power inputs where fast response (<1.0 ps), low leakage (<1 µA @ 26V), and high surge capability are critical.
Technical Context
The SMCJ26H operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (28.9–35.3 V @ 1 mA). Its glass-passivated junction ensures stable breakdown and low leakage, while its DO-214AB thermal design supports 55°C/W junction-to-ambient resistance and 10°C/W junction-to-case resistance.
It complies with AEC-Q101 stress testing for automotive reliability and satisfies ISO 7637-2 transient immunity requirements across all five defined pulses-enabling direct integration into 12V/24V vehicle subsystems without external conditioning circuitry.
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 - Confirmed avalanche onset range under standardized test conditions |
| VC @ IPPM | 46.6 V @ 33 A - Clamped voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPK | 1500 W - Peak pulse power handling per single 1 ms transient event |
| IR @ VWM | <1 µA - Negligible leakage at rated stand-off, preserving system quiescent current |
| TJ max | +150 °C - Enables operation in under-hood automotive environments |
| Package | DO-214AB (SMC) - Surface-mount footprint compatible with automated assembly and IPC-7351B land patterns |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, cathode band marking polarity, 0.210 g weight, UL 94V-0 flammability rating, and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground in unidirectional configuration; carries forward surge current up to 200 A (IFSM) |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 24V rail); initiates avalanche conduction above VBR to shunt transients to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade temperature cycling, humidity bias, and mechanical shock per JEDEC standards |
| ISO 7637-2 compliance | Guaranteed immunity to all five standard vehicle transient pulses without derating or external filtering |
| Fast response time | <1.0 ps rise time from 0 V to VBR min enables protection of high-speed logic and analog front-ends |
| Glass passivated junction | Ensures stable VBR tolerance, low IR drift over life, and resistance to moisture-induced degradation |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally compliant manufacturing |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting 24V supply lines in engine control units (ECUs), body control modules (BCMs), and ADAS sensors against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between 24V rail and chassis ground to clamp surges within 46.6 V. Use Value: Prevents damage to microcontrollers, CAN transceivers, and power management ICs during ISO 7637-2 Pulse 5a (load dump) events. | Use Scenario: Shielding digital input channels on programmable logic controllers (PLCs) from field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Standoff protection element on 24V-rated opto-isolator inputs, activated only during >28.9 V transients. Use Value: Maintains signal integrity and extends field-device lifetime by limiting transient energy to <1500 W per event without sacrificing DC accuracy. |
| Telecom DC Power Input | Motor Drive Control Board |
Use Scenario: Safeguarding primary DC input (e.g., -48 V or +24 V) of base station power supplies and remote radio units. IC Role / Device Role / Timing Role: Primary overvoltage clamp on bulk power entry point, coordinated with upstream fuses and downstream DC-DC converters. Use Value: Absorbs lightning-induced surges per IEC 61000-4-5 (indirect) while maintaining <1 µA leakage at nominal voltage. | Use Scenario: Protecting gate drivers and current-sense amplifiers on motor control boards exposed to inductive kickback from brushed/BLDC motors. IC Role / Device Role / Timing Role: Fast-clamping TVS on low-side current sense shunt supply and isolated gate drive return paths. Use Value: Limits voltage overshoot to ≤46.6 V during 33 A switching transients, preventing latch-up in precision analog components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A | 600W PPK rating, higher VC (49.9 V @ 22.5 A), same DO-214AC (SMA) package | Limited to lower-energy transients; not rated for ISO 7637-2 Pulse 5a | Select SMCJ26H when 1500W surge capacity and automotive qualification are required |
| SMCJ26A | Narrower VBR range (28.9–31.9 V), identical PPK, VC (42.1 V @ 37 A), and package | Lower clamping voltage improves protection margin but tighter VBR may increase false triggering risk in noisy 24V systems | Choose SMCJ26A for tighter VBR tolerance where system noise margins allow |
Compared with SMAJ26A and SMCJ26A, the SMCJ26H offers superior surge energy handling and full ISO 7637-2 compliance-making it the preferred choice for automotive 24V rail protection where transient severity and reliability are non-negotiable.
Availability
SMCJ26H is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, and telecom power supplies requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for SMCJ26H 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 TVS diodes, rectifiers, MOSFETs, and power management devices.
The SMCJ series was designed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust thermal performance in surface-mount packages.
FAQ
What is the clamping voltage of the SMCJ26H under a 10/1000 µs surge?
The SMCJ26H has a maximum clamping voltage (VC) of 46.6 V when subjected to a 10/1000 µs waveform at 33 A peak impulse current (IPPM), as specified in the official Taiwan Semiconductor datasheet. This value defines the upper voltage limit imposed on protected circuitry during transient events and is measured under standardized test conditions per ANSI/IEEE C62.35. The SMCJ26H maintains this clamping performance consistently across its operational temperature range.
Is the SMCJ26H suitable for bidirectional transient protection?
No, the SMCJ26H is a unidirectional TVS diode intended for DC circuits with defined polarity. For bidirectional protection, Taiwan Semiconductor offers the SMCJ26CH or SMCJ26CAH variants, which feature symmetrical breakdown characteristics in both directions. Using the SMCJ26H in an AC or bipolar application would result in forward conduction during negative half-cycles, potentially causing failure. Always verify polarity alignment before integrating the SMCJ26H into a design.
Does the SMCJ26H meet automotive qualification standards?
Yes, the SMCJ26H is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity requirements. Its construction-including glass-passivated junction, matte tin-plated leads, and DO-214AB package-supports operation from –55 °C to +150 °C junction temperature, fulfilling automotive under-hood environmental demands. These qualifications are documented in Taiwan Semiconductor's official SMCJ5.0(A)H–SMCJ170(A)H datasheet revision A2102.
What is the maximum steady-state power dissipation of the SMCJ26H?
The SMCJ26H has a steady-state power dissipation (PD) rating of 5 W at TA = 25 °C, as defined in its Absolute Maximum Ratings table. This value applies only to continuous DC or low-frequency reverse-bias conditions-not transient suppression. In normal operation, the device draws less than 1 µA leakage at 26 V, resulting in negligible static power loss. Thermal design must prioritize transient energy absorption rather than steady-state dissipation, given its intended use case.
How does the SMCJ26H compare to the SMCJ26AH variant?
The SMCJ26AH has a tighter breakdown voltage range (28.9–31.9 V vs. 28.9–35.3 V for the SMCJ26H) and lower clamping voltage (42.1 V @ 37 A vs. 46.6 V @ 33 A), reflecting optimized VBR consistency and improved surge handling margin. Both share identical package, AEC-Q101 qualification, and ISO 7637-2 compliance. The SMCJ26H offers broader VBR tolerance for designs prioritizing robustness over tight clamping, while the SMCJ26AH suits applications demanding precise threshold control and lower VC.
SMCJ26H 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCJ26H FAQ
1.How can I place an order for SMCJ26H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26H 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 SMCJ26H reliable?
The price and inventory of SMCJ26H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ26H is usually 5 days.
3.What payment methods are accepted for SMCJ26H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26H?
SMCJ26H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26H 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 SMCJ26H?
For technical support, including SMCJ26H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26H requirements.
6.How does Aetrix verify that SMCJ26H is sourced from the original manufacturer or authorized distributors?
All SMCJ26H 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 SMCJ26H meets industry standards.
7.What is the process for return or replacement of SMCJ26H?
All SMCJ26H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26H, 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 SMCJ26H part is unused and in its original packaging.
Return procedure for SMCJ26H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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