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Vishay General Semiconductor - Diodes Division SMA6J26AHM3/5A
- Part No.:
- SMA6J26AHM3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J26AHM3/5A.pdf
- Description:
- TVS DIODE 26VWM 40.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,673
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Product details
Overview
SMA6J26AHM3/5A from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor in SMA (DO-214AC) package, with 26 V stand-off voltage (VWM), 28.9–31.9 V breakdown voltage (VBR at IT = 1 mA), and 40.9 V maximum clamping voltage (VC) at 14.7 A peak pulse current (10/1000 μs). It delivers 600 W peak pulse power and protects MOSFETs, ICs, and sensor signal lines against inductive switching transients in industrial and telecom equipment.
For engineers reviewing the SMA6J26AHM3/5A datasheet, SMA6J26AHM3/5A pinout, SMA6J26AHM3/5A application, or SMA6J26AHM3/5A equivalent, key selection factors include its unidirectional polarity, 120 °C/W junction-to-ambient thermal resistance, M3 halogen-free RoHS-compliant construction, and compatibility with automated SMT placement on PCBs with 5.0 mm × 5.0 mm copper pads per terminal.
Technical Context
This device operates as a silicon avalanche diode optimized for transient suppression in DC power rails and low-speed signal paths. Its clamping behavior follows VCLmax = RD × IPP + VBRmax, with dynamic resistance RD = 0.614 Ω and voltage temperature coefficient αT = 9.7 × 10−4/°C - enabling accurate clamping prediction across −55 °C to +150 °C junction temperature range.
It meets J-STD-020 MSL Level 1 moisture sensitivity, supports 260 °C lead-free reflow peak, and features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. The cathode band marking and DO-214AC mechanical outline ensure unambiguous orientation during assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse operating voltage before significant leakage; defines safe DC rail margin for 24 V systems |
| VBR (min/max) | 28.9 V / 31.9 V at IT = 1 mA - guaranteed avalanche onset range; ensures consistent turn-on across production lots |
| VC @ IPP = 14.7 A | 40.9 V - clamped voltage under 10/1000 μs surge; limits downstream IC stress to ≤41 V during 600 W transients |
| PPPM (10/1000 μs) | 600 W - peak transient energy handling capacity; sufficient for IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges |
| IFSM | 50 A - 8.3 ms half-sine surge rating; withstands motor startup or relay coil de-energization currents |
| TJmax | +150 °C - maximum junction temperature; enables operation in sealed enclosures without active cooling |
| RθJA | 120 °C/W - thermal resistance to ambient on standard PCB; requires ≥5 mm² copper pad per terminal for rated PD |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional, cathode indicated by molded band. Dimensions: 4.50 mm × 2.79 mm × 2.20 mm (L × W × H); weight 0.064 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to system ground or return path; forms current sink during transient conduction |
| Cathode | Protected line connection | Connected to line being protected (e.g., 24 V rail or sensor input); carries full surge current to ground |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional polarity | Enables DC-biased protection without forward conduction loss on normal operation; avoids signal distortion on positive-only rails |
| MSL Level 1 rating | Allows indefinite floor life and single-reflow processing without baking; eliminates moisture-related popcorning risk |
| Halogen-free M3 construction | Meets IPC-4101D/126B and JEDEC J-STD-20E environmental requirements for industrial and telecom end-equipment |
| Matte tin plating | Ensures reliable solder joint formation with SnPb and Pb-free pastes; passes JESD 22-B102 wetting balance testing |
| UL 94 V-0 molding compound | Prevents flame propagation in enclosed chassis; satisfies IEC 62368-1 enclosure flammability requirements |
Applications
| Industrial Motor Control | Telecom Power Supply Input |
|---|---|
|
Use Scenario: Protection of 24 V DC input stage in PLC I/O modules against relay coil flyback and contact arcing. IC Role / Device Role / Timing Role: Transient voltage suppressor placed across input terminals, conducting only during >26 V surges. Use Value: Limits clamped voltage to 40.9 V, preventing damage to upstream DC-DC controller ICs rated for 42 V absolute max. |
Use Scenario: Surge protection on primary-side 48 V telecom rectifier outputs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff device absorbing 600 W 10/1000 μs transients before upstream fuse opens. Use Value: Withstands 50 A non-repetitive forward surge, enabling coordination with slow-blow fuses in redundant power architectures. |
| Automotive Body Control Module | Industrial Sensor Signal Line |
|
Use Scenario: Protection of LIN bus transceiver power pins against load dump events in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Unidirectional TVS shunting transients from VCC to GND while maintaining 26 V DC integrity. Use Value: 120 °C/W RθJA allows operation up to +105 °C ambient when mounted on 5 mm² thermal pads - meeting AEC-Q200 Grade 2 requirements. |
Use Scenario: ESD and EFT protection on analog output lines (e.g., 4–20 mA transmitter) in factory automation sensors. IC Role / Device Role / Timing Role: Low-leakage (<0.2 μA at 26 V) clamp minimizing signal offset error in precision current loops. Use Value: 0.614 Ω dynamic resistance ensures minimal VC rise under fast 8/20 μs EFT bursts, preserving loop accuracy during immunity testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J26AHE3/5A | E3 suffix: RoHS-compliant, industrial grade, but not halogen-free; same electrical specs and package | Preferred where halogen content is unrestricted and cost sensitivity outweighs green material requirements | Select SMA6J26AHE3/5A for legacy industrial designs requiring identical performance without halogen-free certification |
| SMBJ26A-M3/57T | SMB (DO-214AA) package: 3.99 mm × 2.54 mm footprint; 10% larger PCB area; 430 W PPPM (10/1000 μs) | Suitable for lower-energy transients or space-constrained layouts accepting reduced power rating | Choose SMBJ26A-M3/57T only if board real estate permits larger footprint and system surge level is ≤430 W |
Compared with SMA6J26AHM3/5A, SMA6J26AHE3/5A offers identical protection performance with non-halogen-free materials, while SMBJ26A-M3/57T trades 28% lower peak power for 25% larger footprint - making SMA6J26AHM3/5A optimal for halogen-free, high-energy 24 V rail protection in compact industrial PCBs.
Availability
SMA6J26AHM3/5A is available at Aetrix Electronics and suitable for industrial motor control, telecom power supply input, and automotive body control module designs requiring stable component supply with halogen-free compliance and MSL Level 1 handling.
Supply support for SMA6J26AHM3/5A 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 transient protection devices with emphasis on reliability and industrial-grade qualification.
The SMA6J series is designed specifically for high-energy transient suppression in harsh-environment DC power and signal interfaces, targeting applications demanding robustness, automated assembly compatibility, and long-term supply stability.
FAQ
What is the maximum clamping voltage of the SMA6J26AHM3/5A at its rated peak pulse current?
The SMA6J26AHM3/5A has a maximum clamping voltage (VC) of 40.9 V at 14.7 A peak pulse current under a 10/1000 μs waveform. This value is measured per the test conditions specified in Vishay's datasheet document 89460 and reflects worst-case conduction across the guaranteed VBR range. Engineers must verify that this clamped voltage remains below the absolute maximum rating of downstream components in their specific circuit layout.
Does the SMA6J26AHM3/5A support lead-free reflow soldering?
Yes, the SMA6J26AHM3/5A is qualified for lead-free reflow with a maximum peak temperature of 260 °C, meeting J-STD-020 MSL Level 1 requirements. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards, ensuring reliable wetting and joint formation using common SnAgCu pastes without pre-baking.
How does the halogen-free M3 suffix affect the electrical performance of SMA6J26AHM3/5A?
The M3 suffix indicates halogen-free molding compound and RoHS compliance but does not alter the electrical characteristics of SMA6J26AHM3/5A. All key parameters - including VWM = 26 V, VBR = 28.9–31.9 V, VC = 40.9 V, and PPPM = 600 W - remain identical to non-M3 variants like SMA6J26AHE3/5A. Only material composition and environmental compliance differ.
Can SMA6J26AHM3/5A be used in bidirectional signal line protection?
No, SMA6J26AHM3/5A is unidirectional only, with cathode marked by a band and designed for DC-biased applications. For bidirectional protection (e.g., RS-485, USB, or AC-coupled signals), a symmetric TVS array or dedicated bidirectional device such as SMBJ26CA-M3/57T must be selected instead of SMA6J26AHM3/5A.
What is the thermal resistance and recommended PCB layout for SMA6J26AHM3/5A to achieve full 4 W power dissipation?
The SMA6J26AHM3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W, measured on PCBs with 5.0 mm × 5.0 mm copper pads per terminal. To sustain 4 W continuous dissipation at TA = 50 °C, designers must implement these minimum pad dimensions and avoid excessive nearby heat sources - otherwise, derating per Figure 2 in datasheet 89460 applies.
SMA6J26AHM3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- 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:
- 40.9V
- Current - Peak Pulse (10/1000µs):
- 14.7A
- Power - Peak Pulse:
- 600W
- 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-214AC (SMA)
SMA6J26AHM3/5A FAQ
1.How can I place an order for SMA6J26AHM3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J26AHM3/5A 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 SMA6J26AHM3/5A reliable?
The price and inventory of SMA6J26AHM3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J26AHM3/5A is usually 5 days.
3.What payment methods are accepted for SMA6J26AHM3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J26AHM3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J26AHM3/5A?
SMA6J26AHM3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J26AHM3/5A 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 SMA6J26AHM3/5A?
For technical support, including SMA6J26AHM3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J26AHM3/5A requirements.
6.How does Aetrix verify that SMA6J26AHM3/5A is sourced from the original manufacturer or authorized distributors?
All SMA6J26AHM3/5A 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 SMA6J26AHM3/5A meets industry standards.
7.What is the process for return or replacement of SMA6J26AHM3/5A?
All SMA6J26AHM3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J26AHM3/5A, 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 SMA6J26AHM3/5A part is unused and in its original packaging.
Return procedure for SMA6J26AHM3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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