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Vishay General Semiconductor - Diodes Division SMCJ26HE3/57T
- Part No.:
- SMCJ26HE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26HE3/57T.pdf
- Description:
- TVS DIODE 26VWM 46.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,022
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Product details
Overview
SMCJ26HE3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of sensitive electronics. It features a 26 V standoff voltage (VWM), 28.9–31.9 V breakdown voltage (VBR) at 1 mA, 42.1 V clamping voltage (VC) at 35.6 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) capability with 10/1000 µs waveform. It is AEC-Q101 qualified and used to protect automotive power rails and industrial sensor interfaces against ESD and load dump transients.
For engineers reviewing the SMCJ26HE3/57T datasheet, SMCJ26HE3/57T pinout, SMCJ26HE3/57T application, or SMCJ26HE3/57T equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, junction temperature derating above 25 °C, unidirectional polarity alignment with DC-biased lines, and compliance with AEC-Q101 for automotive-grade reliability validation.
Technical Context
The SMCJ26HE3/57T operates as a silicon avalanche diode with glass-passivated junction, enabling sub-nanosecond response to transients. Its unidirectional configuration requires cathode-band orientation toward positive supply rail, and it conducts only during reverse overvoltage events - not during normal forward bias.
Thermal performance is defined by RθJA = 75 °C/W (on 8.0 mm × 8.0 mm copper pads) and RθJL = 15 °C/W, supporting operation up to TJ = 150 °C. Peak surge current handling (IFSM = 200 A, 8.3 ms half-sine) and low incremental surge resistance ensure stable clamping under repetitive or high-energy pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected line's nominal DC voltage. |
| VBR min/max | 28.9 V / 31.9 V at IT = 1 mA - Confirmed breakdown range ensures predictable turn-on threshold across production lot. |
| VC @ IPPM | 42.1 V at 35.6 A - Clamping voltage defines worst-case overvoltage seen by downstream circuitry during 10/1000 µs surge. |
| PPPM | 1500 W - Peak pulse power rating determines survivability against standardized lightning or inductive-switching transients. |
| ID @ VWM | 1.0 µA - Reverse leakage at standoff voltage confirms minimal standby power loss and signal integrity on high-impedance lines. |
| TJ max | +150 °C - Maximum junction temperature enables use in under-hood automotive environments without thermal shutdown. |
| AEC-Q101 | Qualified - Validated for automotive applications per stress test requirements including temperature cycling, HTRB, and ESD. |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity marked with cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or lower-potential node; carries surge current during reverse overvoltage event. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 24 V rail); avalanche conduction initiates when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| MSL Level 1 (260 °C peak) | Enables compatibility with standard lead-free reflow profiles without moisture-induced popcorning. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving clamping precision. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS subsystems requiring extended lifetime and field reliability. |
| RoHS-compliant HE3 suffix | Indicates AEC-Q101 qualification and JESD 201 Class 2 whisker resistance for high-reliability solder joints. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V rail and chassis ground to clamp surges above 42.1 V. Use Value: Limits voltage excursion to within safe margin of 48 V-rated power management ICs while surviving 1500 W pulses. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to absorb induced surges from nearby motor switching or relay bounce. Use Value: Prevents latch-up or permanent damage to 12-bit ADC front-ends with ±10 V input ranges via sub-1 ns response and <1 µA leakage. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Shielding PoE-powered network switches from AC-line coupled surges entering via 48 V DC input. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC bus, coordinated with upstream MOV and fuse. Use Value: Provides precise 42.1 V clamping to avoid over-stressing 50 V-rated DC-DC controllers while maintaining UL 497B recognition. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., washing machine control boards). IC Role / Device Role / Timing Role: Mounted across motor terminals to shunt back-EMF energy into ground during MOSFET turn-off. Use Value: Withstands 200 A single-half-sine surge (IFSM) and maintains clamping stability across -55 °C to +150 °C ambient range. |
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). | Suitable for space-constrained consumer PCBs where surge energy is limited to <400 W. | Select SMCJ26HE3/57T when 1500 W surge immunity and AEC-Q101 qualification are required; SMAJ26A-E3/57T fits tighter layouts but offers reduced robustness. |
| SMCJ26AHE3/57T | Identical electrical specs and AEC-Q101 qualification; differs only in marking code (no "CA" suffix confirms unidirectional). | No functional difference - both are unidirectional variants with same VWM, VBR, VC, and packaging. | SMCJ26HE3/57T and SMCJ26AHE3/57T are functionally identical; HE3 suffix denotes AEC-Q101 qualification and JESD 201 Class 2 whisker resistance in both cases. |
Compared with SMAJ26A-E3/57T, the SMCJ26HE3/57T delivers 3.75× higher peak pulse power and superior thermal dissipation, making it suitable for harsh automotive and industrial environments; versus SMCJ26AHE3/57T, it is electrically and mechanically interchangeable with no design impact.
Availability
SMCJ26HE3/57T is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom DC input safeguarding requiring stable component supply across multi-year production cycles.
Supply support for SMCJ26HE3/57T 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, and protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The SMCJ series was developed specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure, balancing clamping precision, surge capacity, and AEC-Q101 compliance in surface-mount form.
FAQ
What is the polarity configuration of the SMCJ26HE3/57T?
The SMCJ26HE3/57T is a unidirectional TVS diode, meaning it clamps only during reverse-bias overvoltage events. The cathode is marked by a band on the package body and must be connected to the protected line (e.g., 24 V rail), while the anode connects to ground. This configuration prevents forward conduction during normal operation.
Does the SMCJ26HE3/57T meet automotive qualification standards?
Yes, the SMCJ26HE3/57T is AEC-Q101 qualified, as confirmed by Vishay's documentation and the "HE3" suffix designation. This qualification covers stress tests including temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge (ESD), validating its use in automotive powertrain and body electronics.
What is the clamping voltage of the SMCJ26HE3/57T under a 10/1000 µs surge?
The SMCJ26HE3/57T has a maximum clamping voltage (VC) of 42.1 V at 35.6 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value represents the worst-case voltage imposed on protected circuitry during full-rated surge conditions.
How does the SMCJ26HE3/57T differ from bi-directional SMCJ26CA variants?
The SMCJ26HE3/57T is unidirectional and intended for DC-biased lines, whereas SMCJ26CA is bi-directional and suited for AC or floating signal lines. Their VBR and VC values differ: SMCJ26CA has symmetric breakdown in both directions and higher ID leakage at low VWM, making it unsuitable as a drop-in replacement without circuit review.
What is the thermal resistance of the SMCJ26HE3/57T in standard mounting conditions?
When mounted on 8.0 mm × 8.0 mm copper pads per Vishay's recommended layout, the SMCJ26HE3/57T exhibits a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W, enabling reliable operation up to 150 °C junction temperature.
SMCJ26HE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 32.2A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ26HE3/57T FAQ
1.How can I place an order for SMCJ26HE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26HE3/57T 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 SMCJ26HE3/57T reliable?
The price and inventory of SMCJ26HE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ26HE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ26HE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26HE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26HE3/57T?
SMCJ26HE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26HE3/57T 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 SMCJ26HE3/57T?
For technical support, including SMCJ26HE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26HE3/57T requirements.
6.How does Aetrix verify that SMCJ26HE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ26HE3/57T 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 SMCJ26HE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ26HE3/57T?
All SMCJ26HE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26HE3/57T, 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 SMCJ26HE3/57T part is unused and in its original packaging.
Return procedure for SMCJ26HE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ26HE3/57T Tags
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