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Vishay General Semiconductor - Diodes Division SMAJ26CA-M3/61
- Part No.:
- SMAJ26CA-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ26CA-M3/61.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,334
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Product details
Overview
SMAJ26CA-M3/61 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal or power lines. It features a 26 V standoff voltage (VWM), 28.9–31.9 V breakdown range (VBR) at 1 mA, 400 W peak pulse power (10/1000 μs), and clamps to ≤42.1 V at 9.5 A peak surge current - deployed for ESD and lightning surge protection in automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the SMAJ26CA-M3/61 datasheet, SMAJ26CA-M3/61 pinout, SMAJ26CA-M3/61 application, or SMAJ26CA-M3/61 equivalent, key selection criteria include bidirectional clamping capability, 42.1 V max clamping voltage at rated IPPM, AEC-Q101 qualification eligibility (via HM3 suffix), halogen-free RoHS compliance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamping protector with symmetrical avalanche behavior in both directions, enabling robust transient suppression without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM), while the low incremental surge resistance supports fast energy dissipation during 10/1000 μs surges.
The SMAJ26CA-M3/61 is rated for continuous operation from −55 °C to +150 °C junction temperature, with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead). It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 when ordered with HM3 suffix - confirming suitability for automotive under-hood and body electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum reverse stand-off voltage before conduction begins; defines safe operating margin below clamping threshold |
| VBR min/max | 28.9 V / 31.9 V at 1 mA - guaranteed avalanche onset range; ensures consistent turn-on across production lots |
| VC @ IPPM | ≤42.1 V at 9.5 A - clamping voltage under 400 W 10/1000 μs surge; limits downstream IC stress during transients |
| PPPM | 400 W - peak pulse power rating (derated to 300 W above 78 V); defines single-event surge handling capacity |
| IPPM | 9.5 A - peak pulse current corresponding to 400 W rating; used to size PCB trace width and pad thermal mass |
| TJ max | +150 °C - maximum junction temperature; enables use in high-ambient environments like engine control units |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 0.208" x 0.157" footprint; compatible with JEDEC-standard reflow profiles |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional - no polarity marking; symmetrical terminal configuration with cathode/anode terminals electrically identical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Connected to protected line or ground reference; conducts equally in either direction during overvoltage events |
| Cathode | Transient return path (bidirectional) | Electrically identical to Anode; no functional distinction in CA devices - forms symmetrical clamping pair |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 400 W peak pulse power (10/1000 μs) | Handles IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 26 V rails with margin |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets automotive and industrial environmental compliance requirements without compromising thermal performance |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free assembly processes without preconditioning or special handling |
| AEC-Q101 qualification option (HM3 suffix) | Validates reliability for automotive applications including engine management, ADAS sensors, and body control modules |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and chassis ground to limit transients to <42.1 V. Use Value: Prevents latch-up or damage to 3.3 V/5 V microcontrollers and ADCs during ISO 7637-2 pulse 5a (load dump) events. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers against field wiring surges. IC Role / Device Role / Timing Role: Primary transient suppressor mounted directly at connector entry point, shunting surge energy before conditioning circuitry. Use Value: Maintains signal integrity by clamping induced spikes to ≤42.1 V while adding <1.0 μA leakage at 26 V operating rail. |
| Consumer Power Adapter Output | Telecom Line Card Protection |
|
Use Scenario: Secondary-side overvoltage protection on 24 V DC output rails of wall-mounted AC/DC adapters for smart home devices. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed across output capacitor to absorb flyback spikes from disconnected loads. Use Value: Limits output overshoot to <42.1 V during hot-plug or short-circuit recovery, preventing damage to downstream USB-PD controllers. |
Use Scenario: Surge protection for Ethernet PHY interfaces and POTS line drivers in telecom access equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: First-stage protector on differential pairs, coordinated with GDTs or polymer PTCs for multi-level defense. Use Value: Clamps common-mode transients to <42.1 V within nanoseconds, preserving signal eye diagram integrity on 10/100BASE-TX links. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A-M3/61 | Unidirectional; 26 V VWM, same VBR/VC specs but asymmetric conduction | Requires correct polarity orientation; unsuitable for AC or floating lines | Select only when protecting DC rails with known polarity and ground-referenced topology |
| SMBJ26CA-M3 | Same VWM/VBR but SMB (DO-214AA) package; 600 W PPPM, larger footprint (0.236" × 0.157") | Higher surge rating supports harsher environments (e.g., railway, solar inverters) but requires more board area | Choose when 600 W surge margin is required and PCB space allows SMB outline |
Compared with SMAJ26A-M3/61, the SMAJ26CA-M3/61 eliminates polarity dependency for flexible layout; versus SMBJ26CA-M3, it trades 200 W pulse power for 25 % smaller footprint - optimizing for space-constrained automotive and portable industrial modules.
Availability
SMAJ26CA-M3/61 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O conditioning, and telecom line card surge suppression requiring stable component supply across extended production cycles.
Supply support for SMAJ26CA-M3/61 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, MOSFETs, and protection devices with emphasis on reliability and automotive-grade qualification.
The SMAJ series targets cost-sensitive, high-volume transient protection needs in automotive, industrial, and consumer systems - delivering standardized TVS performance in compact surface-mount packages with AEC-Q101-ready variants.
FAQ
What does the "CA" suffix indicate in SMAJ26CA-M3/61?
The "CA" suffix denotes a bidirectional configuration - meaning the SMAJ26CA-M3/61 provides symmetrical clamping in both polarities, with identical VBR, VC, and leakage characteristics regardless of voltage polarity applied across its terminals. This eliminates orientation constraints during PCB placement and supports AC-coupled or floating signal paths.
Is SMAJ26CA-M3/61 qualified to AEC-Q101?
The SMAJ26CA-M3/61 itself is not AEC-Q101 qualified; however, the HM3 variant (e.g., SMAJ26CAHM3_A/H) carries full AEC-Q101 qualification. The "M3" suffix indicates halogen-free RoHS compliance only. For automotive under-hood or safety-critical applications, specify the HM3 ordering code to ensure qualification documentation and test reports are provided.
What is the maximum clamping voltage of SMAJ26CA-M3/61 under surge conditions?
The SMAJ26CA-M3/61 has a maximum clamping voltage (VC) of 42.1 V at its rated peak pulse current (IPPM) of 9.5 A, tested with a 10/1000 μs waveform. This value is guaranteed across temperature and lifetime, ensuring downstream components see no more than 42.1 V during standardized surge events.
Can SMAJ26CA-M3/61 be used in place of SMAJ26A-M3/61?
No - SMAJ26CA-M3/61 and SMAJ26A-M3/61 are not interchangeable without circuit review. SMAJ26A-M3/61 is unidirectional and requires correct cathode orientation; SMAJ26CA-M3/61 is bidirectional with no polarity marking. Substituting one for the other may result in failed protection or unintended conduction if polarity is misapplied.
What PCB pad layout is recommended for optimal thermal performance of SMAJ26CA-M3/61?
Vishay specifies mounting SMAJ26CA-M3/61 on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve the rated 400 W peak pulse power. Smaller pads reduce thermal mass and derate power handling - for example, using 0.1" × 0.1" pads may limit sustained surge capability to ~250 W per the derating curve in Figure 2 of datasheet 88390.
SMAJ26CA-M3/61 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:
- -
- Bidirectional Channels:
- 1
- 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)
SMAJ26CA-M3/61 FAQ
1.How can I place an order for SMAJ26CA-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ26CA-M3/61 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 SMAJ26CA-M3/61 reliable?
The price and inventory of SMAJ26CA-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ26CA-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ26CA-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ26CA-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ26CA-M3/61?
SMAJ26CA-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ26CA-M3/61 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 SMAJ26CA-M3/61?
For technical support, including SMAJ26CA-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ26CA-M3/61 requirements.
6.How does Aetrix verify that SMAJ26CA-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ26CA-M3/61 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 SMAJ26CA-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ26CA-M3/61?
All SMAJ26CA-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ26CA-M3/61, 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 SMAJ26CA-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ26CA-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ26CA-M3/61 Tags
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