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Vishay General Semiconductor - Diodes Division SMA5J26A-E3/61
- Part No.:
- SMA5J26A-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J26A-E3/61.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,028
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Product details
Overview
SMA5J26A-E3/61 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on power 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 11.9 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the SMA5J26A-E3/61 datasheet, SMA5J26A-E3/61 pinout, SMA5J26A-E3/61 application, or SMA5J26A-E3/61 equivalent, this page delivers verified electrical parameters, JEDEC-compliant package dimensions, AEC-Q101 qualification status, thermal resistance data (RθJA = 80 °C/W), and real-world clamping behavior under standardized surge conditions.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches rapidly (<1 ns response) to divert transient energy away from downstream components. Its glass-passivated junction ensures stable leakage (<1 µA at 26 V) and long-term reliability under repetitive surges.
Rated for 150 °C maximum junction temperature and MSL Level 1 (260 °C reflow), SMA5J26A-E3/61 supports automated SMT assembly on standard PCB pad layouts (0.2" × 0.2" copper pads per terminal). The matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 26 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 28.9–31.9 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on during transients without premature conduction. |
| VC (Clamping Voltage) | 42.1 V at 11.9 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; enables robust design margin for 3.3 V/5 V/12 V systems. |
| PPPM (Peak Pulse Power) | 500 W - Sustained surge energy handling capability; validated per IEC 61000-4-5 Level 4 (4 kV) test conditions. |
| IPPM (Peak Pulse Current) | 11.9 A - Maximum non-repetitive surge current the device can safely clamp; derived from 500 W / 42.1 V calculation. |
| RθJA (Thermal Resistance) | 80 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; critical for thermal derating above 25 °C ambient. |
| TJmax | 150 °C - Absolute maximum junction temperature; sets upper limit for power dissipation and layout thermal design. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional polarity marked with cathode band. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); compliant with UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse surge return path | Connected to ground or low-impedance return plane; forms shunt path during overvoltage events. |
| Cathode | Reverse-biased terminal / clamping node | Connected to protected line (e.g., 24 V rail or sensor input); voltage referenced to anode during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMA package | Enables compact placement near connectors or IC inputs without height interference in stacked PCB assemblies. |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage (<1 µA) across temperature and lifetime, critical for battery-powered sensors. |
| 500 W peak pulse power | Supports IEC 61000-4-5 surge immunity up to 4 kV (line-earth) in industrial control and automotive body electronics. |
| AEC-Q101 qualified variant available | HE3/HM3 suffix versions meet automotive-grade reliability requirements including temperature cycling and humidity testing. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard 260 °C reflow without baking; simplifies manufacturing logistics. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply lines in vehicle ECUs against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between VBAT and chassis ground. Use Value: Clamps 42.1 V at 11.9 A to keep downstream DC-DC converters and microcontrollers within safe operating area during 100 ms load dump events. |
Use Scenario: Safeguarding analog inputs of PLC analog I/O modules from field-wiring induced surges. IC Role / Device Role / Timing Role: Reverse-biased TVS connected across differential sensor pair (e.g., 4–20 mA loop). Use Value: Limits transient-induced common-mode voltage excursions to <43 V, preventing op-amp saturation and ADC latch-up. |
| Consumer Power Adapter Output Protection | Telecom DC Feeder Line Protection |
|
Use Scenario: Secondary-side surge suppression in 12 V/5 V wall adapters subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional clamping device placed after rectifier, before linear regulator or USB port. Use Value: Absorbs 500 W pulses without degradation, maintaining output regulation integrity during EN 61000-4-5 compliance testing. |
Use Scenario: Overvoltage protection on -48 V DC feeder lines feeding remote radio units in cellular base stations. IC Role / Device Role / Timing Role: Cathode tied to -48 V rail, anode grounded; clamps positive-going transients toward ground. Use Value: Withstands repeated 10/1000 µs surges up to 11.9 A while maintaining <1 µA leakage at nominal -48 V bias. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J26A-M3/61 | Halogen-free, RoHS-compliant variant with identical electrical specs and SMA package; same thermal and clamping performance. | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU public infrastructure projects). | Direct substitution if halogen-free bill-of-materials is required; no layout or thermal redesign needed. |
| SMA5J26CA-E3/61 | Bidirectional version: symmetric clamping in both polarities; VBR = 28.9–31.9 V, VC = 42.1 V, but rated for AC-coupled or floating signal lines. | Used where line polarity is undefined or bidirectional transients occur (e.g., RS-485, CAN bus stubs), not for DC power rails. | Select only when protecting balanced or AC-coupled paths; not suitable as drop-in replacement for unidirectional DC rail protection. |
Compared with SMA5J26A-E3/61, the M3 variant offers identical protection performance with halogen-free construction, while the 26CA variant changes polarity behavior - making it functionally distinct for DC applications but necessary for differential or AC-coupled interfaces.
Availability
SMA5J26A-E3/61 is available at Aetrix Electronics and suitable for automotive ECU power rail protection, industrial PLC analog input hardening, and telecom -48 V DC feeder line surge suppression requiring stable component supply and full traceability.
Supply support for SMA5J26A-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, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, power density, and automotive-grade qualification.
The SMA5J series was engineered for high-power-density transient suppression in space-constrained SMT applications, targeting automotive, industrial, and telecom systems requiring robust IEC/ISO surge immunity without board-level complexity.
FAQ
What is the clamping voltage of the SMA5J26A-E3/61 under standard 10/1000 µs surge conditions?
The SMA5J26A-E3/61 has a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current of 11.9 A using the 10/1000 µs waveform. This value is measured per JEDEC standards and reflects the actual voltage imposed on the protected circuit during worst-case transient events - critical for validating safe operating margins of downstream ICs and regulators in the SMA5J26A-E3/61 application context.
Is the SMA5J26A-E3/61 suitable for automotive applications?
The base SMA5J26A-E3/61 is commercial-grade and RoHS-compliant, but not AEC-Q101 qualified. For automotive use, Vishay offers the SMA5J26AHE3_A variant (HE3 suffix), which undergoes full AEC-Q101 stress testing. Engineers must specify HE3 or HM3 suffix parts - not SMA5J26A-E3/61 - when designing to automotive reliability standards. The SMA5J26A-E3/61 itself remains appropriate for non-automotive industrial or consumer applications.
What is the thermal resistance of the SMA5J26A-E3/61, and how does it affect layout design?
The SMA5J26A-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. This value directly determines allowable power dissipation at elevated ambient temperatures - for example, at 85 °C ambient, derated peak pulse power drops to ~330 W. Layout must replicate the specified pad size and copper area to achieve published thermal performance; reducing pad area increases RθJA and risks thermal runaway during repetitive surges.
How does the SMA5J26A-E3/61 differ from the SMA5J26CA-E3/61?
The SMA5J26A-E3/61 is unidirectional, with cathode marking and forward conduction capability, intended for DC rail protection. The SMA5J26CA-E3/61 is bidirectional - no polarity marking, symmetric clamping in both directions - suited for AC-coupled or floating signal lines like RS-485 or CAN. Their VBR, VC, and PPPM values match, but circuit role and placement rules differ fundamentally. Substituting one for the other without verifying polarity requirements may cause malfunction or damage in the SMA5J26A-E3/61 system.
What packaging format is supplied for the SMA5J26A-E3/61?
The SMA5J26A-E3/61 is supplied in 7" diameter plastic tape and reel format, with a base quantity of 1800 pieces per reel (package code "61"). The tape meets EIA-481 standards, and the reel labeling includes Vishay's traceability data, RoHS compliance statement, and moisture sensitivity level (MSL Level 1). This packaging supports high-speed pick-and-place assembly without manual handling or moisture exposure concerns - essential for consistent yield in volume production of boards using the SMA5J26A-E3/61.
SMA5J26A-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):
- 11.9A
- Power - Peak Pulse:
- 500W
- 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)
SMA5J26A-E3/61 FAQ
1.How can I place an order for SMA5J26A-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J26A-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 SMA5J26A-E3/61 reliable?
The price and inventory of SMA5J26A-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 SMA5J26A-E3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J26A-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J26A-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J26A-E3/61?
SMA5J26A-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J26A-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 SMA5J26A-E3/61?
For technical support, including SMA5J26A-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J26A-E3/61 requirements.
6.How does Aetrix verify that SMA5J26A-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J26A-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 SMA5J26A-E3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J26A-E3/61?
All SMA5J26A-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J26A-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 SMA5J26A-E3/61 part is unused and in its original packaging.
Return procedure for SMA5J26A-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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