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Vishay General Semiconductor - Diodes Division SMCJ26CAHM3/H
- Part No.:
- SMCJ26CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26CAHM3/H.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,209
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Product details
Overview
SMCJ26CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 26 V standoff voltage (VWM), 42.1 V maximum clamping voltage (VC) at 35.6 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive sensor signal lines, industrial I/O interfaces, and telecom power rails.
For engineers reviewing the SMCJ26CAHM3/H datasheet, SMCJ26CAHM3/H pinout, SMCJ26CAHM3/H application, or SMCJ26CAHM3/H equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), halogen-free RoHS compliance (HM3 suffix), and bidirectional clamping behavior confirmed per ANSI/IEEE C62.35.
Technical Context
This device operates as a voltage-clamped shunt protector: under transient overvoltage exceeding its breakdown voltage (VBR min = 28.9 V, max = 31.9 V), it avalanches rapidly (<1 ns response) to divert surge current away from downstream circuitry. Its bidirectional symmetry ensures identical clamping performance for positive and negative transients without polarity dependency.
Thermally, it sustains 150 °C maximum junction temperature with 6.5 W steady-state power dissipation on infinite heatsink at TA = 50 °C. The SMC package provides low incremental surge resistance and meets MSL level 1 (260 °C reflow peak), supporting automated SMT assembly without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse operating voltage before clamping initiates; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 28.9 V / 31.9 V - guaranteed avalanche onset range at 1 mA test current; ensures consistent turn-on across production lots. |
| VC @ IPPM | 42.1 V - clamped voltage at 35.6 A peak pulse current; determines protected circuit's maximum transient exposure level. |
| PPPM | 1500 W - peak pulse power handling with 10/1000 μs waveform; supports high-energy lightning-induced surges per IEC 61000-4-5. |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance; enables thermal design estimation for PCB copper pad layout (8.0 mm × 8.0 mm recommended). |
| TJ max. | +150 °C - maximum junction temperature; permits operation in under-hood automotive environments and industrial enclosures. |
| Compliance | AEC-Q101 qualified, halogen-free, RoHS-compliant (HM3 suffix); certified for automotive-grade reliability and environmental safety. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Bidirectional construction means no polarity marking; both terminals are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Identical bidirectional conduction - either terminal serves as input or return path during ± surges; no orientation required during placement. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., CAN, RS-485) without external polarity management. |
| 1500 W peak pulse power | Withstands 10/1000 μs surges up to 35.6 A - sufficient for Level 4 IEC 61000-4-5 (4 kV line-to-ground) in properly filtered systems. |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, ADAS sensors, and infotainment power supplies per stress test requirements. |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental regulations and eliminates corrosive halogen emissions during PCB reflow or end-of-life incineration. |
| MSL Level 1 rating | Allows unlimited floor life and standard 260 °C reflow profile compatibility - eliminates baking requirements and simplifies SMT line integration. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Shunt TVS diode placed directly at connector entry point to clamp transients before reaching ASIC input pins. Use Value: Maintains signal integrity below 42.1 V clamping threshold while surviving repetitive 1500 W surges - extends sensor lifetime in harsh 12 V/24 V systems. |
Use Scenario: Safeguarding PLC digital input modules against ESD and surge events from field wiring in factory automation cabinets. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input lines, coordinated with upstream PTC and downstream filtering. Use Value: Delivers 35.6 A surge current handling with <1 ns response - prevents latch-up or gate oxide damage in microcontroller GPIO protection circuits. |
| Telecom Power Rail | Consumer USB Port Protection |
Use Scenario: Securing 48 V PoE-powered Ethernet switch ports against lightning-induced surges entering via outdoor cabling. IC Role / Device Role / Timing Role: Secondary-level TVS on DC power input stage, downstream of primary MOV-based front-end protection. Use Value: 26 V VWM aligns with 48 V nominal rail derating; 42.1 V VC ensures downstream DC-DC converters remain within absolute maximum ratings. |
Use Scenario: Protecting USB 2.0 data lines and VBUS in portable chargers and docking stations from human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Bidirectional clamping element on differential D+/D− pair and 5 V supply line. Use Value: Symmetric clamping eliminates need for dual unidirectional devices - reduces BOM count and board space in space-constrained consumer designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26CA-E3/57T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W), non-AEC-Q101. | Suitable for cost-sensitive consumer electronics with lower surge immunity requirements (IEC 61000-4-2 only). | Select when footprint and thermal budget allow reduced surge rating and automotive qualification is unnecessary. |
| SMCJ26AHE3_A/H | Unidirectional variant with cathode band marking; identical VWM, VBR, VC, and PPPM but asymmetric conduction. | Required where DC bias exists and only negative transients must be suppressed (e.g., single-polarity power rails). | Choose only if system topology mandates unidirectional clamping - otherwise SMCJ26CAHM3/H offers broader signal-line flexibility. |
Compared with SMAJ26CA-E3/57T, SMCJ26CAHM3/H delivers 275 % higher surge power handling and automotive qualification; versus SMCJ26AHE3_A/H, it enables polarity-agnostic protection critical for AC-coupled or differential interfaces without redesigning layout or bias networks.
Availability
SMCJ26CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom power supplies requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMCJ26CAHM3/H 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, optoelectronics, and passive components for demanding industrial and automotive applications.
The SMCJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive powertrain, ADAS, and industrial control systems where AEC-Q101 validation and 1500 W surge capability are mandatory.
FAQ
What does the "HM3" suffix indicate in SMCJ26CAHM3/H?
The HM3 suffix in SMCJ26CAHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with automotive reliability standards and environmental regulations, distinguishing it from commercial-grade M3 or E3 variants. This makes SMCJ26CAHM3/H suitable for under-hood and safety-critical automotive applications where material content and stress testing are strictly controlled.
Is SMCJ26CAHM3/H bidirectional or unidirectional?
SMCJ26CAHM3/H is explicitly bidirectional, as indicated by the "CA" suffix in its part number. Its electrical characteristics - including breakdown voltage, clamping voltage, and leakage current - apply identically in both directions. No polarity marking is present on the SMC package, enabling use in AC-coupled circuits, differential buses like CAN or RS-485, and any application requiring symmetrical transient suppression without orientation constraints.
What is the maximum clamping voltage of SMCJ26CAHM3/H and at what current is it specified?
The maximum clamping voltage (VC) of SMCJ26CAHM3/H is 42.1 V, measured at a peak pulse current (IPPM) of 35.6 A using the standardized 10/1000 μs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events and is critical for ensuring downstream ICs remain within their absolute maximum ratings.
Does SMCJ26CAHM3/H meet automotive qualification standards?
Yes, SMCJ26CAHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure and documentation. The "HM3" suffix explicitly identifies the AEC-Q101–qualified, halogen-free version. This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD - validating SMCJ26CAHM3/H for use in automotive powertrain, body electronics, and ADAS subsystems.
What is the thermal resistance and how does it affect PCB layout for SMCJ26CAHM3/H?
SMCJ26CAHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value directly impacts thermal management: for example, at 6.5 W steady-state dissipation, junction temperature rise would be ~488 °C above ambient - underscoring that RθJA applies only under ideal heatsinking. In practice, SMCJ26CAHM3/H is used for transient (not continuous) power dissipation, so layout focuses on low-inductance surge paths rather than DC thermal relief.
SMCJ26CAHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 35.6A
- 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)
SMCJ26CAHM3/H FAQ
1.How can I place an order for SMCJ26CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26CAHM3/H 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 SMCJ26CAHM3/H reliable?
The price and inventory of SMCJ26CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ26CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMCJ26CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26CAHM3/H?
SMCJ26CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26CAHM3/H 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 SMCJ26CAHM3/H?
For technical support, including SMCJ26CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26CAHM3/H requirements.
6.How does Aetrix verify that SMCJ26CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMCJ26CAHM3/H 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 SMCJ26CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMCJ26CAHM3/H?
All SMCJ26CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26CAHM3/H, 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 SMCJ26CAHM3/H part is unused and in its original packaging.
Return procedure for SMCJ26CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ26CAHM3/H Tags
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