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Vishay General Semiconductor - Diodes Division SMCJ26AHM3_A/I
- Part No.:
- SMCJ26AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26AHM3_A/I.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,669
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Product details
Overview
SMCJ26AHM3_A/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 against inductive switching transients and ESD in automotive and industrial power electronics.
For engineers reviewing the SMCJ26AHM3_A/I datasheet, SMCJ26AHM3_A/I pinout, SMCJ26AHM3_A/I application, or SMCJ26AHM3_A/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, 1500 W 10/1000 µs surge capability, thermal resistance of 75 °C/W, and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker test.
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below its 26 V stand-off voltage (VWM), then rapidly avalanches to limit transient voltages to ≤42.1 V during 10/1000 µs surges up to 35.6 A. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance.
Designed for automated SMT placement, it meets MSL Level 1 per J-STD-020 with 260 °C reflow peak, features matte tin-plated leads compliant with J-STD-002 and JESD22-B102, and supports operation from –55 °C to +150 °C junction temperature.
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 occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 42.1 V - Clamped voltage across device during full 35.6 A 10/1000 µs surge, limiting downstream stress |
| PPPM | 1500 W - Peak pulse power handling under standardized 10/1000 µs waveform, critical for surge margin |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on recommended 8 mm × 8 mm copper pads |
| TJ max | +150 °C - Maximum allowable junction temperature, enabling use in under-hood automotive environments |
| ID @ VWM | 1.0 µA - Reverse leakage at 26 V, ensuring minimal standby power loss in high-impedance circuits |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with cathode band marking. Dimensions: 7.11 mm × 6.22 mm × 2.62 mm (L × W × H); terminals are matte tin-plated leads suitable for lead-free reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or lower-potential node in unidirectional clamp configuration |
| Cathode | Current exit point during forward conduction; marked with band | Connected to protected line (e.g., 24 V rail or signal input) to shunt transients to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for modern automotive and industrial PCB assemblies |
| Low incremental surge resistance | Enables tighter clamping and reduced overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a) |
| Very fast response time | Sub-nanosecond avalanche turn-on ensures protection before sensitive downstream components experience overvoltage |
| MSL Level 1 rating | Allows unlimited floor life and single reflow at 260 °C peak, simplifying manufacturing logistics |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply rails in engine control units (ECUs) and body control modules against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and local regulator input to divert surge energy to chassis ground. Use Value: Limits transient voltage to ≤42.1 V, preventing damage to 36 V-rated LDOs and microcontrollers while maintaining AEC-Q101 compliance. | Use Scenario: Safeguarding analog inputs of pressure or temperature sensors connected to long harnesses in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (cathode grounded) used on differential signal pairs to suppress common-mode surges induced by nearby motor drives. Use Value: 1500 W surge rating absorbs repetitive 1 kV/500 A transients per IEC 61000-4-5, preserving sensor accuracy and longevity. |
| Telecom DC Power Input Protection | OBD-II Diagnostic Port Protection |
Use Scenario: Securing 48 V DC input stages of remote radio units and base station power supplies against lightning-induced surges. IC Role / Device Role / Timing Role: Primary TVS stage upstream of DC-DC converters, sized to handle 10/1000 µs waveforms per ITU-T K.20/21. Use Value: 26 V VWM matches nominal 48 V system derating; 42.1 V VC ensures converter input stays within absolute maximum ratings during surge events. | Use Scenario: Hardening vehicle OBD-II connector pins (pins 6/CAN-H and 14/CAN-L) against ESD and cable discharge events during service operations. IC Role / Device Role / Timing Role: Discrete TVS placed on each CAN line referenced to chassis ground, leveraging unidirectional configuration for asymmetric threat suppression. Use Value: Sub-ns response captures ESD pulses before CAN transceivers latch up; halogen-free construction satisfies OEM material declarations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A-E3/57T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Not suitable for 1500 W surge environments; limited to low-energy signal-line protection | Select only when board space is constrained and surge threat level is ≤400 W |
| SMCJ26AHE3_A/I | Same electrical specs but RoHS-compliant commercial grade (non-halogen-free, non-AEC-Q101) | Lacks automotive qualification and halogen-free certification required for Tier 1 OEM programs | Use where AEC-Q101 and halogen-free compliance are not mandated |
Compared with SMCJ26AHM3_A/I, SMAJ26A-E3/57T offers reduced surge capacity and thermal performance in a smaller footprint, while SMCJ26AHE3_A/I provides identical clamping behavior without automotive qualification or halogen-free materials-making SMCJ26AHM3_A/I the sole choice for AEC-Q101–mandated, environmentally compliant 1500 W protection.
Availability
SMCJ26AHM3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power supplies, and OBD-II diagnostic interfaces requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMCJ26AHM3_A/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 targets high-energy transient suppression in harsh environments, with design focus on automotive, industrial, and telecom infrastructure where robustness, thermal stability, and regulatory compliance are mandatory.
FAQ
What is the clamping voltage of SMCJ26AHM3_A/I under a 10/1000 µs surge?
The SMCJ26AHM3_A/I clamps to a maximum of 42.1 V when subjected to its rated 35.6 A peak pulse current under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events, ensuring downstream components remain within safe operating limits.
Is SMCJ26AHM3_A/I qualified for automotive applications?
Yes, SMCJ26AHM3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in datasheet 88394. It undergoes rigorous stress testing-including temperature cycling, high-temperature reverse bias, and mechanical shock-to meet automotive electronic module reliability requirements for under-hood and chassis-mounted systems.
What does the "HM3" suffix indicate in SMCJ26AHM3_A/I?
The "HM3" suffix in SMCJ26AHM3_A/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering nomenclature, "H" indicates AEC-Q101 qualification, "M3" specifies halogen-free and RoHS-compliant materials, and "_A/I" identifies tape-and-reel packaging in 13-inch reels (3500 units per reel).
Can SMCJ26AHM3_A/I be used for bidirectional transient protection?
No, SMCJ26AHM3_A/I is a unidirectional TVS diode, identified by the "A" (not "CA") suffix and cathode band marking. For bidirectional protection, Vishay offers SMCJ26CA variants. Using SMCJ26AHM3_A/I in bidirectional configurations risks forward conduction during negative transients and inadequate clamping.
What is the thermal resistance of SMCJ26AHM3_A/I, and how does it affect layout?
The SMCJ26AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. To maintain safe junction temperatures during repeated surges, PCB layout must provide adequate copper area and avoid thermal bottlenecks-especially critical in automotive applications where ambient temperatures exceed 85 °C.
SMCJ26AHM3_A/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:
- 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):
- 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_A/I FAQ
1.How can I place an order for SMCJ26AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26AHM3_A/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_A/I reliable?
The price and inventory of SMCJ26AHM3_A/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_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ26AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26AHM3_A/I?
SMCJ26AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26AHM3_A/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_A/I?
For technical support, including SMCJ26AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26AHM3_A/I requirements.
6.How does Aetrix verify that SMCJ26AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ26AHM3_A/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_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ26AHM3_A/I?
All SMCJ26AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26AHM3_A/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_A/I part is unused and in its original packaging.
Return procedure for SMCJ26AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ26AHM3_A/I Tags
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