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Vishay General Semiconductor - Diodes Division SMAJ26A-E3/61
- Part No.:
- SMAJ26A-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ26A-E3/61.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,438
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Product details
Overview
SMAJ26A-E3/61 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed to protect sensitive electronics against ESD, lightning-induced surges, and inductive switching transients. It features a 26 V standoff voltage (VWM), 28.9–31.9 V breakdown voltage (VBR) at 1 mA, 42.1 V maximum clamping voltage (VC) at 9.5 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform.
For engineers reviewing the SMAJ26A-E3/61 datasheet, SMAJ26A-E3/61 pinout, SMAJ26A-E3/61 application, or SMAJ26A-E3/61 equivalent, this device serves as a robust, RoHS-compliant, commercial-grade protection solution for DC power rails and signal lines in automotive, industrial, and telecom systems where fast response (<1 ps), low clamping ratio, and AEC-Q101-qualified variants are critical selection criteria.
Technical Context
The SMAJ26A-E3/61 operates as a unidirectional avalanche diode, conducting only in reverse bias above its breakdown threshold to clamp transient overvoltages while maintaining low leakage (<1.0 μA at 26 V). Its glass-passivated junction ensures stable performance across -55 °C to +150 °C operating temperature range and enables compliance with MSL level 1 reflow profile (peak 260 °C).
It delivers 400 W peak pulse power handling on 0.2" × 0.2" copper pads per terminal, with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), supporting reliable surge dissipation without external heatsinking in typical PCB layouts. Polarity is marked by a cathode band on the SMA package body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 24 V systems. |
| VBR min/max | 28.9 V / 31.9 V at IT = 1 mA - Confirmed breakdown window ensures predictable turn-on across production lot and temperature. |
| VC @ IPPM | 42.1 V at 9.5 A - Clamping voltage under 10/1000 μs surge defines maximum stress imposed on protected IC or MOSFET. |
| PPPM | 400 W - Peak pulse power capability determines survivability against standard lightning (IEC 61000-4-5) and EFT (IEC 61000-4-4) events. |
| IFSM | 40 A - Non-repetitive forward surge rating supports robustness during accidental polarity reversal or high-energy fault conditions. |
| TJ max | +150 °C - Maximum junction temperature enables operation in under-hood automotive or high-ambient industrial environments. |
| RθJA | 120 °C/W - Thermal resistance confirms self-heating remains within safe limits under sustained 3.3 W power dissipation at 50 °C ambient. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by molded band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (unidirectional) | Connected to system ground or lower-potential node; forms return path during clamping. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 24 V rail or signal); conducts avalanche current when VIN exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables single-device protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges on 24 V DC inputs without derating. |
| Clamping voltage ≤ 42.1 V at 9.5 A | Provides >10 V margin below typical 50 V absolute maximum rating of industrial-grade microcontrollers and gate drivers. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time), improving protection fidelity for high-speed interfaces. |
| MSL level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
| RoHS-compliant, halogen-free option available | Meets EU RoHS Directive 2011/65/EU and JEDEC J-STD-20E environmental compliance for global OEM supply chains. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protecting 24 V CAN bus power rail against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND to clamp spikes up to ±100 V, ensuring downstream PMIC and CAN transceiver survival. Use Value: Withstand 400 W pulses without degradation, maintaining <1 μA leakage at 26 V to avoid battery drain in sleep mode. |
Use Scenario: Shielding 24 V discrete input channels from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Front-end clamping element before optocoupler or Schmitt trigger input stage, absorbing 10/1000 μs transients from solenoid coil back-EMF. Use Value: 42.1 V clamping ensures protected logic ICs see no more than 3.1 V over nominal 24 V, staying within safe input voltage limits. |
| Telecom Power Supply OVP | Consumer Appliance Motor Driver Board |
Use Scenario: Overvoltage protection on secondary-side 24 V output of AC/DC adapter used in base station remote units. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across output capacitor to prevent latch-up or burnout of synchronous rectifier MOSFETs during output short-circuit recovery. Use Value: 28.9–31.9 V VBR window aligns precisely with 24 V ±10 % regulation tolerance, enabling early clamping before regulator shutdown. |
Use Scenario: Suppressing commutation spikes on H-bridge high-side gate drive lines in smart washing machine motor control boards. IC Role / Device Role / Timing Role: Localized TVS mounted directly at gate driver output pin to limit dv/dt-induced shoot-through and gate oxide stress. Use Value: Sub-100 ps response time prevents voltage overshoot exceeding 45 V, preserving 50 V-rated gate drivers without added RC snubbers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A-M3/61 | Halogen-free, RoHS-compliant variant with identical electrical specs and SMA package. | No functional difference; selected where halogen-free BOM compliance is mandated (e.g., EU medical devices). | Choose SMAJ26A-M3/61 when halogen-free certification is required; otherwise SMAJ26A-E3/61 offers standard RoHS compliance. |
| SMAJ26AHE3_A/61 | AEC-Q101 qualified version with same VWM, VBR, and PPPM; enhanced reliability screening for automotive use. | Required for under-hood or chassis-mounted applications subject to automotive qualification standards (e.g., ISO 16750-2). | Select SMAJ26AHE3_A/61 for automotive OEM designs; SMAJ26A-E3/61 suffices for industrial/commercial grade. |
Compared with SMAJ26A-M3/61 and SMAJ26AHE3_A/61, the SMAJ26A-E3/61 provides baseline commercial-grade surge protection with full parametric equivalence but without halogen-free or automotive qualification-making it optimal for cost-sensitive, non-automotive applications requiring proven 400 W transient immunity.
Availability
SMAJ26A-E3/61 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, telecom power supplies, and consumer appliance motor control systems requiring stable component supply, consistent surge performance, and RoHS-compliant sourcing.
Supply support for SMAJ26A-E3/61 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, efficiency, and application-specific optimization.
The SMAJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness against ESD, lightning, and inductive switching is mission-critical.
FAQ
What is the maximum clamping voltage of the SMAJ26A-E3/61 under a 10/1000 μs surge?
The SMAJ26A-E3/61 has a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current of 9.5 A with a 10/1000 μs waveform. This value is measured per IEC 61000-4-5 test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ26A-E3/61 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C) without derating below 78 V standoff.
Is the SMAJ26A-E3/61 suitable for automotive applications?
The SMAJ26A-E3/61 is a commercial-grade part and not AEC-Q101 qualified. For automotive applications, Vishay offers the SMAJ26AHE3_A/61 variant, which undergoes additional stress testing and screening per AEC-Q101. While the SMAJ26A-E3/61 shares identical electrical parameters and package with the HE3 version, its qualification status limits use to non-safety-critical, non-under-hood industrial or consumer systems. Always verify qualification requirements with your Tier 1 or OEM before selecting SMAJ26A-E3/61 for automotive designs.
What is the standoff voltage (VWM) and why is it important for SMAJ26A-E3/61?
The SMAJ26A-E3/61 has a standoff voltage (VWM) of 26 V, meaning it remains non-conductive and exhibits <1.0 μA reverse leakage up to this DC or RMS voltage. This parameter ensures compatibility with 24 V nominal systems, providing sufficient margin above normal operating voltage while preventing false triggering during ripple or transient excursions. Selecting a VWM too close to system voltage risks premature conduction; 26 V is optimized for 24 V rails with ±10 % tolerance.
Does the SMAJ26A-E3/61 have bidirectional capability?
No, the SMAJ26A-E3/61 is a unidirectional TVS diode, indicated by the "A" suffix (as opposed to "CA" for bidirectional). It conducts only in reverse bias-clamping positive transients on the cathode side-and requires correct polarity orientation during PCB layout. For AC or dual-polarity signal line protection, a bidirectional variant such as SMAJ26CA-E3/61 must be used instead. The SMAJ26A-E3/61's cathode band must be oriented toward the protected line.
What packaging and reel options are available for SMAJ26A-E3/61?
The SMAJ26A-E3/61 ships in 7-inch plastic tape and reel format with a base quantity of 1800 pieces per reel (package code "61"). It uses industry-standard EIA-481-2 compliant carrier tape with pocketed cavities and cover tape. The device is compatible with automated pick-and-place equipment due to its low-profile SMA (DO-214AC) package and matte tin-plated leads. No tray or bulk packaging is offered for this part number; all distribution is via tape-and-reel only.
SMAJ26A-E3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- 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):
- 9.5A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ26A-E3/61 FAQ
1.How can I place an order for SMAJ26A-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ26A-E3/61 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 SMAJ26A-E3/61 reliable?
The price and inventory of SMAJ26A-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ26A-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ26A-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ26A-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ26A-E3/61?
SMAJ26A-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ26A-E3/61 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 SMAJ26A-E3/61?
For technical support, including SMAJ26A-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ26A-E3/61 requirements.
6.How does Aetrix verify that SMAJ26A-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ26A-E3/61 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 SMAJ26A-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ26A-E3/61?
All SMAJ26A-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ26A-E3/61, 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 SMAJ26A-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ26A-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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