My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ26AHE3/57T
- Part No.:
- SMCJ26AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26AHE3/57T.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,400
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ26AHE3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 26 V standoff voltage (VWM), 28.9–31.9 V breakdown voltage (VBR) at 1 mA test current, 42.1 V maximum clamping voltage (VC) at 35.6 A peak pulse current (IPPM), and 1500 W peak pulse power rating with 10/1000 μs waveform.
For engineers reviewing the SMCJ26AHE3/57T datasheet, SMCJ26AHE3/57T pinout, SMCJ26AHE3/57T application, or SMCJ26AHE3/57T equivalent, key selection criteria include clamping performance under 35.6 A surge, thermal resistance (RθJA = 75 °C/W), AEC-Q101 qualification for automotive use, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ26AHE3/57T operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold (VBR), thereby shunting transient energy to ground while maintaining low clamping voltage (VC = 42.1 V). Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), critical for protecting MOSFETs and ICs from ESD and switching spikes.
Designed for surface-mount assembly, it meets J-STD-020 MSL Level 1 (peak reflow 260 °C), uses matte tin-plated leads compliant with JESD 22-B102, and supports bidirectional variants via CA suffix - though SMCJ26AHE3/57T itself is unidirectional with cathode band marking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before conduction begins; defines safe signal line operating margin. |
| VBR (min/max) | 28.9 V / 31.9 V at IT = 1 mA - Confirmed breakdown range ensuring reliable triggering without premature conduction. |
| VC @ IPPM | 42.1 V at 35.6 A - Clamping voltage during 10/1000 μs surge; determines maximum stress imposed on protected circuitry. |
| PPPM | 1500 W - Peak pulse power handling capability; enables robust protection against IEC 61000-4-5 Level 4 surges. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments. |
| RθJA | 75 °C/W - Thermal resistance junction-to-ambient; requires minimum 8.0 mm × 8.0 mm copper pad per terminal for rated derating. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control units and ADAS sensor interfaces. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads. Cathode indicated by band marking on body; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to ground or low-impedance return path; conducts surge current during overvoltage events. |
| Anode (unbanded end) | Protected line connection | Connected to signal/power line requiring protection; reverse-biased during normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal and electrical stress. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for downstream ICs. |
| MSL Level 1 compliance | Enables single-pass reflow without moisture-related popcorning; no bake-out required prior to assembly. |
| 1500 W peak pulse power | Supports protection against high-energy transients such as ISO 7637-2 Pulse 5a (load dump) in 12 V systems. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from load dump and jump-start transients in 12 V vehicle electrical systems. IC Role / Device Role: Unidirectional TVS clamp placed between power rail and ground, triggered only during overvoltage events. Use Value: Limits voltage seen by protected ICs to ≤42.1 V during 35.6 A surges, preventing latch-up or gate oxide damage in automotive-grade MCUs. |
Use Scenario: Safeguarding analog outputs of pressure and temperature sensors in factory automation PLC modules exposed to relay coil flyback. IC Role / Device Role: Standoff-mode protector on 4–20 mA current loop lines, absorbing inductive kickback without affecting DC accuracy. Use Value: Maintains 26 V operating margin while clamping transients within 1 ns, preserving sensor signal integrity and ADC reference stability. |
| Telecom DC Power Input Protection | Consumer Device USB Port ESD Suppression |
|
Use Scenario: Front-end protection for PoE-powered network switches subjected to lightning-induced surges on 48 V DC input rails. IC Role / Device Role: Primary surge suppressor upstream of DC-DC converters, diverting >1 kA-equivalent energy per IEC 61000-4-5. Use Value: Delivers 1500 W peak power dissipation with 42.1 V clamping, enabling compact design without external heat sinking. |
Use Scenario: Secondary-level protection on USB VBUS lines in portable audio devices where primary ESD diodes lack sufficient surge rating. IC Role / Device Role: High-energy backup suppressor activated after initial ESD event degrades low-capacitance front-end diodes. Use Value: Handles repetitive 35.6 A surges without degradation, extending system lifetime beyond IEC 61000-4-2 Level 4 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC26A | Lower PPPM (600 W), higher VC (45.7 V at 13.1 A), same VWM (26 V), SOD-123FL package. | Targeted at space-constrained consumer electronics; insufficient for automotive load dump. | Select SAC26A only for cost-sensitive, low-energy applications where PCB area is critical and surge levels remain below 600 W. |
| SMCJ26CAHE3/57T | Bidirectional variant with identical VWM (26 V), VBR (28.9–31.9 V), and VC (42.1 V); same package and AEC-Q101 qualification. | Required for AC-coupled or differential signal lines (e.g., CAN FD, RS-485) needing symmetrical clamping. | Choose SMCJ26CAHE3/57T when protecting bidirectional data buses; otherwise, SMCJ26AHE3/57T offers lower leakage and simpler grounding. |
Compared with SAC26A, SMCJ26AHE3/57T delivers 2.5× higher surge power handling and tighter thermal management via SMC package; versus SMCJ26CAHE3/57T, it provides lower reverse leakage and simplified ground-referenced layout for unidirectional DC rails.
Availability
SMCJ26AHE3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface, telecom DC input, and consumer USB port protection requiring stable component supply across production lifecycles.
Supply support for SMCJ26AHE3/57T 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The SMCJ series targets high-energy transient suppression in harsh environments, with design focus on AEC-Q101 compliance, low clamping voltage, and compatibility with automated SMT manufacturing for automotive, industrial, and telecom infrastructure.
FAQ
What is the maximum clamping voltage of the SMCJ26AHE3/57T during a 10/1000 µs surge?
The SMCJ26AHE3/57T has a maximum clamping voltage (VC) of 42.1 V at 35.6 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 standards and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ26AHE3/57T maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is the SMCJ26AHE3/57T suitable for automotive applications?
Yes, the SMCJ26AHE3/57T is AEC-Q101 qualified and specifically designed for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its construction includes glass-passivated junction, MSL Level 1 reflow compatibility, and guaranteed operation from -55 °C to +150 °C. The SMCJ26AHE3/57T meets requirements for load dump (ISO 7637-2 Pulse 5a) and ESD immunity in vehicle subsystems.
What does the "HE3" suffix indicate in SMCJ26AHE3/57T?
The "HE3" suffix in SMCJ26AHE3/57T denotes RoHS-compliant construction with AEC-Q101 qualification, distinguishing it from commercial-grade "E3" variants. It confirms halogen-free molding compound, matte tin-plated leads compliant with JESD 22-B102, and whisker resistance per JESD 201 Class 2. The SMCJ26AHE3/57T is intended for automotive and high-reliability industrial deployments where extended lifetime and process consistency are mandatory.
How is thermal performance managed for the SMCJ26AHE3/57T in PCB layout?
The SMCJ26AHE3/57T requires minimum 8.0 mm × 8.0 mm copper pads per terminal to achieve its rated 1500 W peak pulse power and 75 °C/W junction-to-ambient thermal resistance (RθJA). Layout must avoid thermal isolation; internal copper planes and vias to inner-layer ground planes improve heat dissipation. Derating applies above 25 °C ambient - for example, at 70 °C TA, maximum non-repetitive pulse power drops to ~1050 W per Figure 2 in the datasheet. The SMCJ26AHE3/57T performs reliably only when mounted per Vishay's recommended pad dimensions.
Can the SMCJ26AHE3/57T be used in bidirectional signal protection?
No, the SMCJ26AHE3/57T is a unidirectional TVS diode and must not be used for bidirectional signal lines such as CAN, RS-485, or AC-coupled interfaces. Its cathode band marking indicates polarity-sensitive operation - it conducts only when anode is more negative than cathode. For bidirectional protection, the SMCJ26CAHE3/57T variant is specified, offering symmetrical clamping in both directions. Using SMCJ26AHE3/57T in bidirectional applications risks failure during positive half-cycle transients.
SMCJ26AHE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ26AHE3/57T FAQ
1.How can I place an order for SMCJ26AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26AHE3/57T 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 SMCJ26AHE3/57T reliable?
The price and inventory of SMCJ26AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ26AHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ26AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26AHE3/57T?
SMCJ26AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26AHE3/57T 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 SMCJ26AHE3/57T?
For technical support, including SMCJ26AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26AHE3/57T requirements.
6.How does Aetrix verify that SMCJ26AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ26AHE3/57T 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 SMCJ26AHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ26AHE3/57T?
All SMCJ26AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26AHE3/57T, 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 SMCJ26AHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ26AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ26AHE3/57T Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
