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Taiwan Semiconductor Corporation SMCJ26AH
- Part No.:
- SMCJ26AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26AH.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,678
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Product details
Overview
SMCJ26AH 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), 28.9–31.9V breakdown voltage (VBR), and 42.1V maximum clamping voltage (VC) at 37A peak pulse current - designed to protect automotive power lines and industrial I/O interfaces against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ26AH datasheet, SMCJ26AH pinout, SMCJ26AH application, or SMCJ26AH equivalent, this part supports AEC-Q101 qualified designs requiring sub-1ps response time, <1µA reverse leakage above 10V, and robust 150°C junction operation in space-constrained SMC-packaged ESD and surge protection circuits.
Technical Context
The SMCJ26AH employs a glass-passivated silicon junction optimized for fast transient suppression with typical response time under 1.0ps from 0V to VBR(min). Its unidirectional configuration provides low forward voltage drop (VF = 3.5V @ 100A) and meets ISO 7637-2 immunity requirements for automotive load-dump and inductive switching events.
Thermally, it features RθJA = 55°C/W and RθJC = 10°C/W, enabling reliable 5W steady-state dissipation at 25°C ambient. The device operates across –55°C to +150°C junction temperature range and complies with J-STD-020 Level 1 moisture sensitivity and JESD 201 Class 2 whisker resistance.
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 / 31.9 V - Breakdown initiates within this range at 1 mA test current |
| VC @ IPPM | 42.1 V - Clamped voltage during 37 A 10/1000 µs surge, limiting downstream stress |
| PPK | 1500 W - Peak pulse power handling per single 1 ms transient per Fig.5 |
| IR @ VWM | <1 µA - Minimal leakage at rated stand-off, preserving signal integrity in high-impedance nodes |
| TJ max | +150 °C - Enables use in under-hood automotive and industrial environments |
| Package | DO-214AB (SMC) - Surface-mount footprint compatible with automated placement and IPC-7351B SMC standard |
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 rated compound, and JEDEC-compliant outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to protected line (e.g., battery rail or signal trace) when used unidirectionally |
| Cathode | Current exit point in forward bias; marked by band | Connected to ground or lower-potential reference to enable clamping during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Glass-passivated junction | Enhances long-term stability and reduces parameter drift under thermal stress |
| ISO 7637-2 compliance | Guarantees immunity to standardized automotive transient waveforms (Pulse 1/2a/2b/3a/3b) |
| Sub-1ps response time | Clamps transients before sensitive ICs experience damaging voltage overshoot |
| Level 1 moisture sensitivity | Enables standard SMT reflow without baking preconditioning |
Applications
| Automotive Power Line Protection | Industrial I/O Interface Protection |
|---|---|
Use Scenario: Protecting 12V/24V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges exceeding 26V. Use Value: Limits clamping voltage to 42.1V at 37A, preventing damage to 36V-rated DC-DC converters and microcontrollers. | Use Scenario: Shielding PLC analog input channels from field-induced surges on 4–20mA loops. IC Role / Device Role / Timing Role: Standoff protection element parallel to input filter, activated only during >26V transients. Use Value: Sub-1µA leakage preserves measurement accuracy; DO-214AB footprint fits dense industrial PCB layouts. |
| Telecom DC Power Input Protection | Consumer Equipment USB/Power Adapter Protection |
Use Scenario: Safeguarding PoE-powered switches and base stations against lightning-induced surges on 48V DC inputs. IC Role / Device Role / Timing Role: Primary surge clamp on secondary-side DC bus, coordinated with upstream MOVs. Use Value: 1500W peak rating handles multi-kA induced surges; 150°C TJ rating supports enclosed telecom enclosures. | Use Scenario: Adding secondary-level surge immunity to AC/DC adapter outputs feeding smart home hubs. IC Role / Device Role / Timing Role: Final-stage TVS on regulated 5V/12V output rails before connector interface. Use Value: Low-profile SMC package enables compact adapter design; AEC-Q101 grade ensures extended field life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26A | 600W rating, SMB package (smaller footprint, lower PPK) | Suitable for lower-energy transients; not recommended for ISO 7637-2 Pulse 1 or 2b | Select SMCJ26AH when 1500W surge capacity and AEC-Q101 validation are required |
| SMCJ26A | Same package and rating but lacks AEC-Q101 qualification and ISO 7637-2 documentation | Acceptable for commercial/industrial use where automotive qualification is not mandated | Choose SMCJ26AH for automotive Tier-1 BOMs requiring certified reliability evidence |
Compared with SMBJ26A and SMCJ26A, the SMCJ26AH delivers verified AEC-Q101 compliance and documented ISO 7637-2 immunity - critical for automotive electronics where transient resilience must be certified, not assumed.
Availability
SMCJ26AH is available at Aetrix Electronics and suitable for automotive power line protection, industrial I/O interface hardening, and telecom DC input surge suppression requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMCJ26AH 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 with global distribution and automotive qualification capabilities.
The SMCJ26AH belongs to TSC's AEC-Q101-qualified SMCJ(A)H series - engineered specifically for high-reliability transient suppression in automotive and industrial systems demanding ISO 7637-2 compliance and robust thermal performance.
FAQ
What is the clamping voltage of the SMCJ26AH at its rated peak pulse current?
The SMCJ26AH has a maximum clamping voltage (VC) of 42.1 V at 37 A peak pulse current (IPPM), measured using the 10/1000 µs waveform per IEC 61000-4-5. This value ensures downstream components see limited overvoltage during surge events, making the SMCJ26AH suitable for protecting 36V-rated circuitry in automotive and industrial applications.
Is the SMCJ26AH unidirectional or bidirectional, and how is polarity identified?
The SMCJ26AH is a unidirectional TVS diode, indicated by the absence of "C" or "CA" suffix. Polarity is marked by a cathode band on the DO-214AB (SMC) package body - the banded end connects to ground or the lower-potential node during normal operation, enabling clamping only on positive transients relative to that reference.
Does the SMCJ26AH meet AEC-Q101 requirements, and what tests does that include?
Yes, the SMCJ26AH is AEC-Q101 qualified. This certification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling (TC), highly accelerated stress test (HAST), mechanical shock, and ESD (HBM ≥ 8 kV, CDM ≥ 1 kV), confirming suitability for automotive electronic control units and powertrain modules.
What is the maximum steady-state power dissipation for the SMCJ26AH at 25°C ambient?
The SMCJ26AH has a steady-state power dissipation (PD) rating of 5 W at TA = 25°C, derating linearly above that temperature per the pulse derating curve (Fig.2). This rating applies to continuous DC or low-frequency reverse-biased conditions - not transient surge events, which are governed by the 1500W PPK limit.
How does the SMCJ26AH differ from the non-A version (SMCJ26H)?
The SMCJ26AH offers tighter breakdown voltage tolerance (28.9–31.9 V vs. 28.9–35.3 V for SMCJ26H) and full AEC-Q101 qualification with documented ISO 7637-2 test reports. Both share the same DO-214AB package and 1500W rating, but only the SMCJ26AH is approved for automotive safety-critical applications requiring certified transient immunity.
SMCJ26AH 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:
- 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)
SMCJ26AH FAQ
1.How can I place an order for SMCJ26AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26AH 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 SMCJ26AH reliable?
The price and inventory of SMCJ26AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ26AH is usually 5 days.
3.What payment methods are accepted for SMCJ26AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26AH?
SMCJ26AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26AH 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 SMCJ26AH?
For technical support, including SMCJ26AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26AH requirements.
6.How does Aetrix verify that SMCJ26AH is sourced from the original manufacturer or authorized distributors?
All SMCJ26AH 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 SMCJ26AH meets industry standards.
7.What is the process for return or replacement of SMCJ26AH?
All SMCJ26AH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26AH, 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 SMCJ26AH part is unused and in its original packaging.
Return procedure for SMCJ26AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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