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Vishay General Semiconductor - Diodes Division SMCJ26AHE3_A/H
- Part No.:
- SMCJ26AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26AHE3_A/H.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,300
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Product details
Overview
SMCJ26AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. 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) with 10/1000 µs waveform - deployed in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMCJ26AHE3_A/H datasheet, SMCJ26AHE3_A/H pinout, SMCJ26AHE3_A/H application, or SMCJ26AHE3_A/H equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), junction temperature range (–55 to +150 °C), and RoHS-compliant matte tin-plated terminals per J-STD-002.
Technical Context
The SMCJ26AHE3_A/H operates as a unidirectional avalanche diode, leveraging glass-passivated silicon junction technology to achieve sub-nanosecond response time and low incremental surge resistance. Its clamping behavior is defined by a 10/1000 µs double-exponential surge waveform, with VC tightly specified at 42.1 V under 35.6 A IPPM - enabling predictable overvoltage limiting in 24 V nominal systems.
Designed for PCB-level ESD and lightning-induced transient suppression, it meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), supports automated placement, and is qualified to AEC-Q101 for automotive use. Polarity is marked by a cathode band; no marking on bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse operating voltage before clamping begins; matches 24 V rail systems with safety margin. |
| VBR (min/max) | 28.9 V / 31.9 V at IT = 1 mA - guaranteed avalanche initiation window; ensures reliable turn-on without premature conduction. |
| VC @ IPPM | 42.1 V at 35.6 A - clamped voltage during 1500 W transient; limits downstream IC stress to safe levels in 24 V applications. |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform; sustains high-energy transients like ISO 7637-2 Pulse 1/2a/5a. |
| TJ max. | +150 °C - maximum junction temperature; enables operation in under-hood automotive environments and industrial enclosures. |
| RθJA | 75 °C/W - thermal resistance junction-to-ambient on standard 8 mm × 8 mm copper pads; informs heatsinking requirements for sustained surge duty. |
| ID @ VWM | 1.0 µA - reverse leakage at 26 V; negligible power loss and minimal impact on high-impedance sensor bias networks. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode identified by molded band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connects to protected line (e.g., 24 V rail); conducts surge current to ground when V > VBR. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - suitable for engine control units and ADAS power supplies. |
| Glass-passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives; critical for harsh-environment deployments. |
| MSL Level 1 rating | Enables single-reflow assembly without baking; compatible with standard SMT lines using peak profile up to 260 °C. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients (e.g., inductive switch-off), improving clamping precision and system immunity. |
| 1500 W peak pulse power | Withstands repetitive ISO 7637-2 Pulse 5a (500 W typical) and IEC 61000-4-5 Combination Wave (surge generator) events without degradation. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
|
Use Scenario: Protecting 24 V supply input of body control module (BCM) against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input. Use Value: Clamps transients to ≤42.1 V, preventing damage to downstream LDOs and microcontrollers while meeting ISO 16750-2 requirements. |
Use Scenario: Shielding analog output (4–20 mA) of pressure sensor from ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional device used across signal and return lines with common-ground reference. Use Value: Sub-ns response ensures clamping before sensor amplifier saturation; <1 µA leakage preserves signal integrity at µA-level currents. |
| Telecom DC Power Feeder Protection | OBD-II Diagnostic Port Surge Suppression |
|
Use Scenario: Safeguarding -48 V telecom rectifier outputs from lightning-induced surges on outdoor plant wiring. IC Role / Device Role / Timing Role: Primary TVS on feed line prior to hot-swap controller and backup battery interface. Use Value: 1500 W PPPM handles IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges; RθJA = 75 °C/W allows derating to 1100 W at 85 °C ambient. |
Use Scenario: Hardening OBD-II connector pins (pins 4, 5, 16) against ESD and vehicle battery reversal during service. IC Role / Device Role / Timing Role: Discrete TVS mounted directly at connector footprint, cathode to VBAT, anode to chassis ground. Use Value: AEC-Q101 qualification ensures compliance with SAE J1128; 26 V VWM avoids false triggering during cold-crank (6–8 V) or boost charging (up to 14.8 V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ26A | Same VWM (26 V), slightly higher VC (43.0 V), lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W). | Not AEC-Q101 qualified; limited to commercial/industrial use; unsuitable for automotive under-hood locations. | Select if space-constrained layout prioritizes size over automotive qualification and surge energy handling. |
| ON Semiconductor 1.5SMC26A | Identical VWM (26 V), same SMC package, but rated for 1500 W PPPM and AEC-Q101 - however, VBR min is 27.4 V (vs. 28.9 V), yielding earlier conduction. | Higher ID (5 µA vs. 1 µA) may affect ultra-low-power sensor bias networks; otherwise functionally aligned for 24 V systems. | Prefer when tighter VBR tolerance is acceptable and dual-source procurement is required; verify leakage impact in high-Z circuits. |
Compared with SMCJ26AHE3_A/H, SMAJ26A trades automotive qualification and surge capacity for smaller size, while 1.5SMC26A offers comparable performance with earlier breakdown onset and higher leakage - making SMCJ26AHE3_A/H optimal for AEC-Q101–mandated, high-energy 24 V protection where precise VBR control and low leakage are critical.
Availability
SMCJ26AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power feeders requiring stable component supply with full traceability and lifecycle management.
Supply support for SMCJ26AHE3_A/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 diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMCJ series targets high-energy transient suppression in automotive, industrial, and telecom infrastructure - engineered for AEC-Q101 compliance, robust surge handling, and seamless SMT integration.
FAQ
What is the clamping voltage of SMCJ26AHE3_A/H at its rated peak pulse current?
The SMCJ26AHE3_A/H has a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current (IPPM) of 35.6 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for 24 V systems. The SMCJ26AHE3_A/H maintains this clamping performance across its qualified operating temperature range of –55 °C to +150 °C.
Is SMCJ26AHE3_A/H qualified for automotive applications?
Yes, SMCJ26AHE3_A/H is explicitly AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation (Document Number 88394, Revision 09-Jan-2024). This qualification covers stress tests including temperature cycling, high-temperature reverse bias (HTRB), and surge endurance - making the SMCJ26AHE3_A/H suitable for under-hood and chassis-mounted automotive modules such as body control units and ADAS power supplies.
What is the thermal resistance of SMCJ26AHE3_A/H, and how does it affect layout design?
The SMCJ26AHE3_A/H 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. This value directly impacts PCB thermal design: for example, at 1500 W peak power, even brief surges raise junction temperature significantly - so layouts must ensure adequate copper area and minimize trace length to ground. The SMCJ26AHE3_A/H's RθJL of 15 °C/W further supports heat transfer to leads, reinforcing the need for solid thermal vias beneath pads.
How does the leakage current of SMCJ26AHE3_A/H compare to similar TVS diodes, and why does it matter?
The SMCJ26AHE3_A/H specifies a maximum reverse leakage current (ID) of 1.0 µA at its 26 V standoff voltage (VWM), which is lower than many competing 24 V TVS devices (e.g., 5–10 µA). This low leakage is critical in high-impedance circuits - such as sensor bias networks or battery-monitoring dividers - where excess current could shift reference points or drain standby power. The SMCJ26AHE3_A/H achieves this via precise junction control and glass passivation, preserving signal fidelity in precision analog paths.
Can SMCJ26AHE3_A/H be used in bidirectional configurations?
No - SMCJ26AHE3_A/H is a unidirectional TVS diode, indicated by the "A" suffix (not "CA") and cathode band marking. Bidirectional operation requires the "CA" variant (e.g., SMCJ26CA), which lacks polarity marking and clamps symmetrically in both directions. Using SMCJ26AHE3_A/H in a bidirectional circuit would result in forward conduction during negative transients, potentially damaging the device or failing to protect. Always match the SMCJ26AHE3_A/H to unidirectional DC rail protection only.
SMCJ26AHE3_A/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:
- 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:
- -
- 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_A/H FAQ
1.How can I place an order for SMCJ26AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26AHE3_A/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 SMCJ26AHE3_A/H reliable?
The price and inventory of SMCJ26AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ26AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ26AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26AHE3_A/H?
SMCJ26AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26AHE3_A/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 SMCJ26AHE3_A/H?
For technical support, including SMCJ26AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26AHE3_A/H requirements.
6.How does Aetrix verify that SMCJ26AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ26AHE3_A/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 SMCJ26AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ26AHE3_A/H?
All SMCJ26AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26AHE3_A/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 SMCJ26AHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ26AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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