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Vishay General Semiconductor - Diodes Division SMA5J26HE3/5A
- Part No.:
- SMA5J26HE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J26HE3/5A.pdf
- Description:
- TVS DIODE 26VWM 46.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,842
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Product details
Overview
SMA5J26HE3/5A from Vishay General Semiconductor is a uni-directional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for high-energy surge protection on power and signal lines. It features a 26 V stand-off 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 (IPPM), and 500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive power rail and industrial sensor interface protection.
For engineers reviewing the SMA5J26HE3/5A datasheet, SMA5J26HE3/5A pinout, SMA5J26HE3/5A application, or SMA5J26HE3/5A equivalent, key selection criteria include clamping performance under 10/1000 μs surges, AEC-Q101 qualification for automotive use, thermal resistance (RθJA = 80 °C/W), RoHS compliance with whisker-tested matte tin leads, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a uni-directional clamping device, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its electrical characteristics are specified at TA = 25 °C with derating above that temperature per Figure 2, and it sustains 40 A non-repetitive forward surge current (IFSM) for 8.3 ms half-sine wave.
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and is qualified to AEC-Q101 - confirming suitability for under-hood automotive electronics where thermal cycling and long-term reliability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR min/max | 28.9 V / 31.9 V at IT = 1 mA - guaranteed breakdown range ensures consistent turn-on across production lots. |
| VC @ IPPM | 42.1 V at 11.9 A - clamping voltage limits downstream IC stress during standardized 10/1000 μs transients. |
| PPPM | 500 W - peak pulse power handling capacity with 10/1000 μs waveform, enabling robust protection against IEC 61000-4-5 surges. |
| TJ max | +150 °C - maximum junction temperature supports operation in high-ambient environments like engine control units. |
| RθJA | 80 °C/W - thermal resistance from junction to ambient; requires minimum 5.0 mm × 5.0 mm copper pad per terminal for rated power dissipation. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band; polarity-critical for uni-directional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side (e.g., ground or return) in uni-directional configuration; must be routed with low-inductance trace. |
| Cathode | Reverse-biased clamping node | Connected to protected line (e.g., 24 V supply); band-marked end - incorrect orientation disables protection. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including powertrain and body electronics, with extended temperature cycling and humidity testing. |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives, reducing parameter drift over life. |
| MSL Level 1 rating | Enables single-reflow assembly without baking; peak reflow tolerance up to 260 °C supports standard lead-free processes. |
| JESD 201 Class 2 whisker test | HE3 suffix confirms matte tin plating resists tin whisker growth under thermal stress - critical for high-reliability automotive modules. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 24 V supply lines in engine control units (ECUs) from load dump and alternator transients. IC Role / Device Role / Timing Role: Uni-directional TVS clamp placed between battery feed and DC-DC input, absorbing energy before it reaches regulator ICs. Use Value: Clamps to 42.1 V at 11.9 A, limiting stress on downstream 40 V-rated regulators while surviving 500 W surges per ISO 7637-2 Pulse 5a. |
Use Scenario: Shielding analog inputs of industrial PLC analog I/O modules from ESD and field-wiring induced surges. IC Role / Device Role / Timing Role: Front-end transient suppressor on 4–20 mA current loop or 0–10 V sensor lines, placed before signal conditioning op-amps. Use Value: Sub-ns response and 42.1 V clamping prevent op-amp saturation and latch-up during 8 kV contact ESD events per IEC 61000-4-2. |
| Telecom Power Supply Input | Consumer Appliance Motor Drive |
Use Scenario: Safeguarding AC-DC adapter primary-side rectifier outputs in telecom base station power supplies. IC Role / Device Role / Timing Role: Parallel-connected TVS across bulk capacitor to absorb switching spikes and lightning-induced surges on 48 V bus. Use Value: 500 W PPPM and 42.1 V VC ensure reliable clamping without thermal runaway during repeated 10/1000 μs transients per IEC 61000-4-5. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., washing machine drum drives). IC Role / Device Role / Timing Role: Mounted across motor terminals to clamp flyback voltage during MOSFET turn-off in H-bridge drivers. Use Value: Withstands 40 A IFSM for 8.3 ms, accommodating high-current commutation spikes while maintaining <100 ns response to protect gate drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ26A | Same DO-214AC package, VWM = 26 V, VC = 42.1 V, but rated for 400 W PPPM (vs. 500 W) and not AEC-Q101 qualified. | Approved for commercial/industrial use only; unsuitable for automotive under-hood deployment requiring AEC-Q101. | Select when cost sensitivity outweighs automotive qualification needs and 400 W surge margin suffices. |
| ON Semiconductor SMA5J26A | Identical electrical specs (VWM = 26 V, VC = 42.1 V, PPPM = 500 W), same DO-214AC package, but HE3 suffix not offered - only E3 (commercial grade, no AEC-Q101). | Lacks AEC-Q101 validation and JESD 201 Class 2 whisker testing; limited to non-automotive applications. | Choose if AEC-Q101 is not required and existing supply chain uses ON Semi branding. |
Compared with SMA5J26HE3/5A, SMAJ26A offers lower surge rating and no automotive qualification, while SMA5J26A matches electrical performance but omits AEC-Q101 and enhanced whisker resistance - making SMA5J26HE3/5A the sole option meeting full automotive reliability requirements in this form factor.
Availability
SMA5J26HE3/5A is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom power supply surge suppression requiring stable component supply, AEC-Q101 compliance, and RoHS-compliant manufacturing.
Supply support for SMA5J26HE3/5A 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 protection devices with emphasis on reliability, power density, and automotive-grade qualification.
The SMA5J series was engineered for high-power-density transient suppression in space-constrained automotive and industrial systems, prioritizing AEC-Q101 compliance, low clamping voltage, and robust surge handling in the DO-214AC footprint.
FAQ
What is the clamping voltage of the SMA5J26HE3/5A under a 10/1000 μs surge?
The SMA5J26HE3/5A has a maximum clamping voltage (VC) of 42.1 V at 11.9 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet and ensures predictable overvoltage limiting for protected circuits downstream of the SMA5J26HE3/5A.
Is the SMA5J26HE3/5A qualified for automotive applications?
Yes, the SMA5J26HE3/5A is AEC-Q101 qualified and carries the HE3 suffix, indicating RoHS compliance plus JESD 201 Class 2 whisker testing. It is explicitly rated for automotive use, including under-hood environments with operating junction temperatures up to +150 °C.
What does the "HE3" suffix mean in SMA5J26HE3/5A?
The "HE3" suffix denotes two key attributes: "H" indicates AEC-Q101 qualification, and "E3" specifies RoHS-compliant matte tin plating that meets JESD 201 Class 2 whisker resistance requirements. The "5A" denotes 7500-unit reel packaging in 13-inch diameter tape.
What is the thermal resistance of the SMA5J26HE3/5A, and how does it affect layout?
The SMA5J26HE3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W. To achieve rated 500 W pulse power, the PCB must provide minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads to each terminal - undersized pads will cause excessive junction heating and derated surge capability.
Can the SMA5J26HE3/5A be used in bi-directional configurations?
No, the SMA5J26HE3/5A is a uni-directional TVS diode, as confirmed by its "A" suffix and cathode band marking. Bi-directional variants use the "CA" suffix (e.g., SMA5J26CA). Using SMA5J26HE3/5A in reverse-biased AC applications would result in forward conduction and failure.
SMA5J26HE3/5A 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:
- 46.6V
- Current - Peak Pulse (10/1000µs):
- 10.7A
- Power - Peak Pulse:
- 500W
- 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)
SMA5J26HE3/5A FAQ
1.How can I place an order for SMA5J26HE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J26HE3/5A 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 SMA5J26HE3/5A reliable?
The price and inventory of SMA5J26HE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J26HE3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J26HE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J26HE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J26HE3/5A?
SMA5J26HE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J26HE3/5A 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 SMA5J26HE3/5A?
For technical support, including SMA5J26HE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J26HE3/5A requirements.
6.How does Aetrix verify that SMA5J26HE3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J26HE3/5A 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 SMA5J26HE3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J26HE3/5A?
All SMA5J26HE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J26HE3/5A, 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 SMA5J26HE3/5A part is unused and in its original packaging.
Return procedure for SMA5J26HE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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