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Vishay General Semiconductor - Diodes Division SMCJ26AHM3/I
- Part No.:
- SMCJ26AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26AHM3/I.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,649
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Product details
Overview
SMCJ26AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 26 V standoff voltage, 42.1 V clamping voltage at 35.6 A peak pulse current, and 1500 W peak pulse power rating. It protects MOSFETs, ICs, and sensor signal lines in automotive power systems and industrial control interfaces.
For engineers reviewing the SMCJ26AHM3/I datasheet, SMCJ26AHM3/I pinout, SMCJ26AHM3/I application, or SMCJ26AHM3/I equivalent, this part delivers AEC-Q101 qualified transient suppression for 12 V/24 V automotive subsystems, meets UL 497B recognition, and supports halogen-free, RoHS-compliant production with J-STD-002 solderability.
Technical Context
The SMCJ26AHM3/I uses a glass-passivated silicon junction to achieve sub-nanosecond response to transients, with low incremental surge resistance enabling stable clamping under repetitive 10/1000 µs surges. Its unidirectional polarity features a cathode band marking and operates with 1.0 µA max reverse leakage at 26 V standoff.
Thermally, it sustains 150 °C maximum junction temperature, with 75 °C/W junction-to-ambient thermal resistance on standard 8.0 mm × 8.0 mm copper pads and 15 °C/W junction-to-lead resistance-enabling reliable operation in convection-cooled automotive ECUs and industrial motor drives without active heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 26 V - Maximum continuous reverse operating voltage before clamping begins |
| Breakdown Voltage (VBR) | 28.9–31.9 V at 1 mA - Confirmed avalanche initiation range for precise overvoltage threshold setting |
| Clamping Voltage (VC) | 42.1 V at 35.6 A - Peak voltage seen by protected circuit during 1500 W transient event |
| Peak Pulse Power (PPPM) | 1500 W - Sustains 10/1000 µs surge per IEEE C62.35 without degradation |
| Operating Temperature | -55 °C to +150 °C - Validated for under-hood automotive and industrial ambient conditions |
| Package | SMC (DO-214AB) - Surface-mount footprint compatible with automated placement and reflow profiles up to 260 °C peak |
| AEC-Q101 Qualified | Yes - Certified for automotive-grade reliability including temperature cycling and HTRB stress testing |
Pinout & Package
SMCJ26AHM3/I is housed in the SMC (DO-214AB) package: a rectangular surface-mount case measuring 7.11 mm × 6.22 mm × 2.62 mm, with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Polarity is marked by a cathode band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or common return path; forms current path during forward-biased surge conduction |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 12 V rail or CAN-H); carries full surge current into ground via anode during clamping |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognized | QVGQ2 file E136766 - Enables direct use in telecom and automotive signal line protection without additional certification overhead |
| Halogen-Free & RoHS | HM3 suffix - Meets IEC 61249-2-21 and JEDEC JS709E for environmentally constrained supply chains |
| MSL Level 1 | No floor life limitation - Can be stored indefinitely prior to reflow without baking or dry pack requirements |
| Fast Response Time | < 1.0 ns - Limits voltage overshoot during ESD and load-dump events in safety-critical control circuits |
| Low Clamping Ratio | VC/VWM = 1.62 - Minimizes stress margin between clamping and device operating voltage for robust 24 V system design |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V power rails in engine control units against ISO 7637-2 load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery feed and DC-DC converter input to clamp surges above 35 V. Use Value: Withstands 1500 W pulses and maintains 42.1 V clamping, preventing overvoltage damage to downstream regulators and microcontrollers. | Use Scenario: Shielding analog output lines of pressure or temperature sensors from ESD and inductive switching noise in factory automation PLCs. IC Role / Device Role / Timing Role: TVS mounted directly at connector entry point to shunt fast transients before reaching precision ADC front-end. Use Value: Sub-ns response and 1.0 µA leakage at 26 V preserve signal integrity and measurement accuracy in 4–20 mA loops. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Safeguarding Ethernet PHY power pins and auxiliary bias rails in carrier-grade line cards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional suppressor on 3.3 V or 5 V auxiliary supplies, coordinated with upstream GDT or MOV stages. Use Value: UL 497B recognition and 1500 W rating enable compliance with GR-1089-CORE Level 4 surge immunity requirements. | Use Scenario: Secondary-side transient suppression on DC output rails of universal-input AC/DC adapters used in smart home hubs and IoT gateways. IC Role / Device Role / Timing Role: TVS placed after secondary rectifier to absorb reflected switching spikes and external ESD events. Use Value: Halogen-free HM3 construction supports global regulatory compliance, while 150 °C TJ rating ensures reliability in enclosed, thermally constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26AHE3/A | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Suitable only for lower-energy transients; not rated for automotive load dump | Select when space-constrained PCB layout prioritizes size over surge capacity |
| SMCJ26A-M3/57T | Same electrical specs and SMC package; differs only in packaging format (7" tape vs. 13" tape/reel I-code) | Identical functional performance; no design or layout impact | Choose based on procurement logistics-not technical differentiation |
Compared with SMAJ26AHE3/A and SMCJ26A-M3/57T, the SMCJ26AHM3/I provides full 1500 W surge capability in an AEC-Q101 qualified, halogen-free SMC package with industry-standard 13" reel delivery-making it the optimal choice for automotive and industrial designs requiring validated high-energy clamping and long-term supply continuity.
Availability
SMCJ26AHM3/I is available at Aetrix Electronics and suitable for automotive power modules, industrial sensor nodes, and telecom line card designs requiring stable component supply, halogen-free compliance, and AEC-Q101 qualification.
Supply support for SMCJ26AHM3/I 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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series was developed specifically for high-power transient suppression in harsh environments-including automotive, industrial, and telecom infrastructure-where consistent clamping performance and long-term stability under thermal and surge stress are mandatory.
FAQ
What is the clamping voltage of the SMCJ26AHM3/I at its rated peak pulse current?
The SMCJ26AHM3/I has a maximum clamping voltage (VC) of 42.1 V at its specified peak pulse current (IPPM) of 35.6 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry will not experience voltages exceeding 42.1 V during standardized surge events-critical for safeguarding 3.3 V, 5 V, and 24 V logic and power rails. The SMCJ26AHM3/I maintains this clamping performance across its full operating temperature range.
Is the SMCJ26AHM3/I suitable for automotive applications?
Yes, the SMCJ26AHM3/I is AEC-Q101 qualified and explicitly designated for automotive use via its HM3 suffix (halogen-free, RoHS-compliant, and AEC-Q101 qualified). It meets stringent requirements for temperature cycling, high-temperature reverse bias, and surge endurance-making it appropriate for engine control units, body electronics, and ADAS power domains. The SMCJ26AHM3/I's 150 °C maximum junction temperature and UL 497B recognition further validate its suitability for under-hood and chassis-mounted systems.
How does the SMCJ26AHM3/I differ from the standard SMCJ26A-E3 variant?
The SMCJ26AHM3/I shares identical electrical specifications and SMC (DO-214AB) package with SMCJ26A-E3 but adds halogen-free construction (per JEDEC JS709E) and AEC-Q101 qualification. Its "HM3" suffix indicates compliance with automotive reliability standards and environmental regulations, while the "I" denotes 13-inch tape-and-reel packaging (3500 units per reel). In contrast, SMCJ26A-E3 is commercial-grade, RoHS-compliant but not halogen-free or AEC-Q101 certified. The SMCJ26AHM3/I is therefore the preferred choice where automotive qualification or green-material mandates apply.
What is the thermal resistance of the SMCJ26AHM3/I, and how does it affect PCB layout?
The SMCJ26AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal, and 15 °C/W junction-to-lead (RθJL). This means minimal copper area is required for thermal management-no dedicated heatsink or thermal vias are needed for typical 1500 W surge duty cycles. For sustained power dissipation, however, designers should maintain ≥ 8 mm² pad area per lead and avoid excessive trace length. The SMCJ26AHM3/I's low RθJL also enables effective heat transfer to adjacent ground planes, simplifying layout in space-constrained automotive modules.
Does the SMCJ26AHM3/I have UL recognition, and what does that mean for system certification?
Yes, the SMCJ26AHM3/I carries Underwriters Laboratories recognition under file E136766 for protector classification per UL 497B, covering both unidirectional and bidirectional variants. This means the device has been independently evaluated for surge suppression performance, flammability (UL 94 V-0 molding compound), and long-term reliability-reducing the burden of system-level surge testing. When used per Vishay's recommended layout, the SMCJ26AHM3/I contributes directly to achieving compliance with IEC 61000-4-5 (surge immunity) and GR-1089-CORE (telecom) standards without requiring additional external components. The SMCJ26AHM3/I's UL recognition applies to its full rated performance envelope, including 1500 W peak pulse power.
SMCJ26AHM3/I 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCJ26AHM3/I FAQ
1.How can I place an order for SMCJ26AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26AHM3/I 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 SMCJ26AHM3/I reliable?
The price and inventory of SMCJ26AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ26AHM3/I is usually 5 days.
3.What payment methods are accepted for SMCJ26AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26AHM3/I?
SMCJ26AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26AHM3/I 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 SMCJ26AHM3/I?
For technical support, including SMCJ26AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26AHM3/I requirements.
6.How does Aetrix verify that SMCJ26AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMCJ26AHM3/I 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 SMCJ26AHM3/I meets industry standards.
7.What is the process for return or replacement of SMCJ26AHM3/I?
All SMCJ26AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26AHM3/I, 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 SMCJ26AHM3/I part is unused and in its original packaging.
Return procedure for SMCJ26AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ26AHM3/I Tags
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Diodes Incorporated
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