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Vishay General Semiconductor - Diodes Division SMA5J26A-E3/5A
- Part No.:
- SMA5J26A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J26A-E3/5A.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,471
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Product details
Overview
SMA5J26A-E3/5A 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), 42.1 V clamping voltage at 11.9 A peak pulse current (IPPM), and 500 W peak pulse power (10/1000 µs waveform). It is widely used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the SMA5J26A-E3/5A datasheet, SMA5J26A-E3/5A pinout, SMA5J26A-E3/5A application, or SMA5J26A-E3/5A equivalent, key selection criteria include clamping performance under 10/1000 µs transients, unidirectional polarity marking, thermal resistance (RθJA = 80 °C/W), RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches to limit transient energy across protected circuit nodes. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 µA at 26 V), while its low incremental surge resistance enables effective clamping even during high-current surges up to 11.9 A.
The device is rated for -55 °C to +150 °C junction temperature, meets MSL Level 1 per J-STD-020 (260 °C peak reflow), and supports unidirectional surge suppression only - cathode marked by band. It is not rated for bidirectional operation; for that, SMA5J26CA must be selected.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before avalanche conduction begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 28.9 V / 31.9 V at 1 mA - Confirmed breakdown threshold range; ensures reliable triggering above system overvoltage but below IC absolute maximum ratings. |
| VC @ IPPM | 42.1 V at 11.9 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream components during ESD or load-dump events. |
| PPPM | 500 W - Peak pulse power handling capability; validates suitability for ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surge testing. |
| RθJA | 80 °C/W - Junction-to-ambient thermal resistance; requires ≥5.0 mm × 5.0 mm copper pad per terminal for full derating compliance at TA = 25 °C. |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports protection of rectifier stages and DC input rails against inrush or fault currents. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads. Cathode identified by a single black band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return node; forms shunt path during reverse transient events. |
| Cathode | Reverse voltage sensing / Clamping node | Connected to protected line (e.g., 24 V rail); avalanche conduction initiates here when VAK > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Low profile SMA package | Enables high-density PCB layouts and compatibility with standard SMT pick-and-place equipment without height interference. |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage (<1 µA), critical for battery-powered or low-power sensor circuits. |
| 500 W peak pulse power | Provides robust immunity against ISO 7637-2 load dump (up to 120 V, 100 ms) and IEC 61000-4-5 combination wave surges (4 kV/2 Ω). |
| MSL Level 1 rating | Supports single-reflow assembly at 260 °C peak without popcorn cracking or delamination, eliminating pre-bake requirements. |
| RoHS-compliant, halogen-free option available | E3 suffix indicates commercial-grade RoHS compliance; M3 suffix adds halogen-free molding compound for strict environmental compliance programs. |
Applications
| Automotive Power Distribution | Industrial PLC Input Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply inputs in body control modules against load dump transients (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between 24 V rail and chassis ground to clamp surges up to 120 V. Use Value: Limits clamped voltage to 42.1 V, keeping downstream regulators and microcontrollers within safe operating area during 500 W transient events. |
Use Scenario: Safeguarding digital input channels of programmable logic controllers exposed to inductive switching noise from solenoids and contactors. IC Role / Device Role / Timing Role: TVS mounted at connector interface to absorb fast-rising transients (tr < 1 ns) before they reach isolation barriers or input buffers. Use Value: Fast response time and low clamping voltage prevent false triggering or latch-up in 24 V optocoupled inputs during repetitive 1 kV/500 A surges. |
| DC Motor Drive Gate Protection | Automotive Sensor Signal Line Protection |
|
Use Scenario: Shielding high-side N-channel MOSFET gate drivers from Miller-induced voltage spikes during motor commutation. IC Role / Device Role / Timing Role: TVS connected between gate and source to clamp dv/dt-induced overshoot exceeding VGS(max). Use Value: 42.1 V clamping ensures gate oxide integrity for 30 V-rated MOSFETs, preventing premature failure in 24 V H-bridge designs. |
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) in engine control units from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed inline with signal trace to ground, preserving signal integrity up to 20 kHz bandwidth. Use Value: Sub-1 µA leakage at 26 V avoids loading of high-impedance sensor outputs; fast avalanche response prevents ESD damage to ASIC front-end amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ26A | Same SMA package, identical VWM (26 V), VC = 42.5 V at 11.8 A, PPPM = 400 W (lower than SMA5J26A-E3/5A's 500 W). | Marginally lower surge power rating; suitable for less severe transients (e.g., IEC 61000-4-4 EFT only), not recommended for full ISO 7637-2 Pulse 5a validation. | Select SMA5J26A-E3/5A where 500 W rating and AEC-Q101 qualification path (via HE3 suffix) are required. |
| ON Semiconductor 1.5SMC27A | Higher VWM (27 V), VBR = 30–33.2 V, VC = 43.5 V at 11.5 A, same 500 W rating, but in larger SMC (DO-214AB) package (2.54 mm pitch vs. SMA's 1.98 mm). | Requires PCB layout change due to larger footprint and higher mounting height; better thermal dissipation but incompatible with space-constrained automotive modules. | Choose SMA5J26A-E3/5A for compact 24 V rail protection where board area is constrained and MSL Level 1 reflow compatibility is mandatory. |
Compared with SMAJ26A and 1.5SMC27A, the SMA5J26A-E3/5A delivers the highest power density (500 W in SMA), tightest VBR tolerance (±5.2%), and verified compatibility with high-speed SMT lines - making it optimal for automotive and industrial designs demanding miniaturization, repeatability, and surge margin.
Availability
SMA5J26A-E3/5A is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC input protection, DC motor drive gate protection, and automotive sensor signal line protection requiring stable component supply across production lifecycles.
Supply support for SMA5J26A-E3/5A 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, TVS devices, and optoelectronics with emphasis on reliability, power density, and automotive qualification.
The SMA5J series is part of Vishay's high-power-density TRANSZORB® TVS platform, engineered specifically for robust transient suppression in 12 V/24 V automotive and industrial systems where space, thermal performance, and surge margin are critical.
FAQ
What is the clamping voltage of the SMA5J26A-E3/5A under a 10/1000 µs surge?
The SMA5J26A-E3/5A clamps to 42.1 V at its rated peak pulse current of 11.9 A under a 10/1000 µs waveform. This value is measured per Fig. 1 in the Vishay datasheet (Doc. #88875) and defines the maximum voltage seen by protected circuitry during standardized surge events. The SMA5J26A-E3/5A maintains this clamping performance across its specified operating temperature range.
Is the SMA5J26A-E3/5A suitable for bidirectional transient protection?
No, the SMA5J26A-E3/5A is a unidirectional TVS diode - it conducts only in reverse bias above VBR and blocks forward current beyond its forward voltage drop (~3.5 V at 25 A). For bidirectional protection, the SMA5J26CA variant must be used. The SMA5J26A-E3/5A cathode is marked by a band; no marking exists on bidirectional types.
What does the "E3/5A" suffix indicate in SMA5J26A-E3/5A?
The "E3" denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads. The "/5A" specifies packaging in 13-inch diameter plastic tape and reel, containing 7500 units - optimized for high-volume SMT assembly. This differs from "/61", which uses 7-inch reels with 1800 units. The SMA5J26A-E3/5A is not AEC-Q101 qualified; for automotive qualification, the SMA5J26AHE3_A/I variant is required.
How does the thermal resistance of SMA5J26A-E3/5A affect PCB layout?
The SMA5J26A-E3/5A has a typical RθJA of 80 °C/W, which assumes mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain rated power dissipation, each pad must be ≥25 mm² and thermally connected to internal ground/power planes. Reducing pad size increases junction temperature and requires derating per Fig. 2 in the SMA5J26A-E3/5A datasheet.
Can SMA5J26A-E3/5A replace SMAJ26A in an existing design?
The SMA5J26A-E3/5A is a functional upgrade over SMAJ26A: both share the same SMA package, VWM, and polarity, but SMA5J26A-E3/5A offers 500 W peak power (vs. 400 W) and tighter VBR tolerance. No PCB changes are needed, though layout review should confirm thermal pad adequacy for the higher surge rating. The SMA5J26A-E3/5A remains backward compatible in all electrical and mechanical aspects.
SMA5J26A-E3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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-E3/5A FAQ
1.How can I place an order for SMA5J26A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J26A-E3/5A 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 SMA5J26A-E3/5A reliable?
The price and inventory of SMA5J26A-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J26A-E3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J26A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J26A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J26A-E3/5A?
SMA5J26A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J26A-E3/5A 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 SMA5J26A-E3/5A?
For technical support, including SMA5J26A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J26A-E3/5A requirements.
6.How does Aetrix verify that SMA5J26A-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J26A-E3/5A 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 SMA5J26A-E3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J26A-E3/5A?
All SMA5J26A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J26A-E3/5A, 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 SMA5J26A-E3/5A part is unused and in its original packaging.
Return procedure for SMA5J26A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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