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Vishay General Semiconductor - Diodes Division SMAJ24CA-M3/61
- Part No.:
- SMAJ24CA-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ24CA-M3/61.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,350
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Product details
Overview
SMAJ24CA-M3/61 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for clamping voltage transients on power and signal lines. It features a 24 V standoff voltage (VWM), 38.9 V maximum clamping voltage (VC) at 10.3 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and DC power rail surge suppression.
For engineers reviewing the SMAJ24CA-M3/61 datasheet, SMAJ24CA-M3/61 pinout, SMAJ24CA-M3/61 application, or SMAJ24CA-M3/61 equivalent, key selection criteria include bidirectional clamping capability, SMA (DO-214AC) package compatibility, AEC-Q101 qualification eligibility (via HM3 suffix), low incremental surge resistance, and UL 497B recognition for telecom and industrial protectors.
Technical Context
This device operates as a voltage-clamping protector with symmetrical breakdown behavior in both directions due to its bidirectional construction. Its glass-passivated junction enables fast response (<1 ns) to ESD and lightning-induced transients, while the low Rsurge ensures minimal voltage overshoot during high-current surges up to 10.3 A.
The SMAJ24CA-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 J-STD-020 MSL Level 1 and is halogen-free and RoHS-compliant per Vishay's M3 suffix designation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 24 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR min/max (Breakdown Voltage) | 26.7 V / 29.5 V at 1 mA - Confirmed bidirectional avalanche onset range; ensures predictable turn-on under transient stress. |
| VC (Clamping Voltage) | 38.9 V at IPPM = 10.3 A - Peak voltage seen by protected circuit during 10/1000 μs surge; critical for IC-level overvoltage margining. |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy absorption capability under standard 10/1000 μs waveform; supports repetitive surge events at 0.01% duty cycle. |
| ID (Reverse Leakage) | 1.0 μA max at 24 V - Ultra-low leakage preserves signal integrity and minimizes standby power loss in high-impedance nodes. |
| TJ max | +150 °C - Enables use in under-hood automotive and industrial environments without derating below full power rating. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.0 mm × 5.0 mm copper pad thermal design; compatible with automated placement and reflow. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; polarity-unmarked for bidirectional operation; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (either direction) | Acts as cathode during positive surge on one terminal; bidirectional symmetry eliminates orientation dependency in layout. |
| Cathode | Transient current exit point (either direction) | Functions as anode during negative surge; identical electrical behavior to Anode terminal due to CA-series symmetry. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection on AC-coupled or floating signal lines without polarity concerns - e.g., RS-485, CAN bus, sensor bridges. |
| 400 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity testing on 24 V systems without external series impedance. |
| UL 497B recognized (QVGQ2) | Validates suitability for telecom and industrial communication port protection where regulatory agency listing is mandatory. |
| Halogen-free & RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for global OEM production including automotive Tier 1 supply chains. |
| MSL Level 1, 260 °C peak reflow | Allows standard lead-free PCB assembly without moisture sensitivity handling or baking prior to reflow. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor line and ground to clamp transients before they reach ADC input or microcontroller GPIO. Use Value: Maintains signal fidelity under 100 V/50 ms load dump events while adding <1 pF capacitance - no data corruption or false triggering. |
Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges from relay coils or motor drives. IC Role / Device Role / Timing Role: Standoff-rated clamping device across input terminals to limit voltage to ≤38.9 V during 10/1000 μs transients. Use Value: Prevents latch-up or permanent damage to optocoupler input stages while supporting 24 V nominal industrial logic levels. |
| DC Power Rail Surge Suppression | Telecom Line Interface Protection |
Use Scenario: Secondary-level surge protection on 24 V DC power distribution boards in factory automation equipment. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing residual energy after primary MOV or GDT stages. Use Value: Clamps residual spikes to 38.9 V within nanoseconds, protecting downstream DC-DC converters and PMICs rated for 40 V max input. |
Use Scenario: UL 497B-compliant protection on POTS or xDSL line interface circuits exposed to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Bidirectional suppressor bridging tip/ring or differential pair to shunt surge energy to ground. Use Value: Meets safety certification requirements while delivering sub-40 V clamping - essential for preserving SLIC and codec IC reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-M3/61 | Unidirectional; cathode band marking required; VF = 3.5 V at 25 A forward conduction. | Only suitable where polarity is fixed (e.g., DC power rail with known ground reference); not usable on AC or floating lines. | Select only when circuit topology guarantees consistent polarity and lower forward voltage drop is beneficial. |
| SMBJ24CA-M3/61 | Same VWM/VC specs but in SMB (DO-214AA) package; 600 W PPPM rating; higher thermal mass. | Better suited for higher-energy surge environments (e.g., outdoor industrial gateways); requires larger PCB footprint. | Choose when system-level surge test requirements exceed 400 W or board layout allows SMB footprint. |
Compared with SMAJ24CA-M3/61, the unidirectional SMAJ24A-M3/61 lacks bidirectional symmetry and demands strict polarity alignment, while the SMBJ24CA-M3/61 offers 50% higher surge power handling at the cost of 30% larger board area - making SMAJ24CA-M3/61 optimal for space-constrained, polarity-agnostic 24 V protection.
Availability
SMAJ24CA-M3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital I/O modules, DC power rail surge suppression, and telecom line interface protection requiring stable component supply across high-volume production cycles.
Supply support for SMAJ24CA-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, efficiency, and application-specific performance.
The SMAJ series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial control, and communications infrastructure where AEC-Q101 qualification, UL recognition, and repeatable clamping behavior are mandatory.
FAQ
What does the "CA" suffix indicate in SMAJ24CA-M3/61?
The "CA" suffix denotes bidirectional functionality - meaning SMAJ24CA-M3/61 provides symmetrical clamping in both polarities, unlike unidirectional "A" variants. This eliminates polarity-dependent placement errors and enables use on AC-coupled or floating signal paths such as RS-485, CAN, or sensor bridge outputs without external diode networks.
Is SMAJ24CA-M3/61 qualified for automotive applications?
SMAJ24CA-M3/61 itself is commercial-grade (M3 suffix), but Vishay offers AEC-Q101-qualified versions under HM3 ordering codes (e.g., SMAJ24CAHM3/61). The base SMAJ24CA-M3/61 shares identical electrical and thermal characteristics and can be used in non-safety-critical automotive subsystems where qualification is not mandated by program requirements.
What is the maximum clamping voltage of SMAJ24CA-M3/61 under surge conditions?
The maximum clamping voltage (VC) of SMAJ24CA-M3/61 is 38.9 V at 10.3 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is guaranteed across temperature and lifetime, ensuring downstream 40 V-rated ICs remain within absolute maximum ratings during standardized surge events.
How does the SMA (DO-214AC) package affect thermal performance of SMAJ24CA-M3/61?
The SMA (DO-214AC) package delivers RθJA = 120 °C/W and RθJL = 30 °C/W, enabling reliable operation at full 400 W pulse power when mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Its low profile supports dense PCB layouts while maintaining sufficient thermal dissipation for intermittent surge duty cycles.
Does SMAJ24CA-M3/61 meet any safety certifications?
Yes - SMAJ24CA-M3/61 is Underwriters Laboratory (UL) recognized under file E136766 for both unidirectional and bidirectional devices per UL 497B, covering telecommunications and industrial protector classifications. This certification validates its suitability for certified end-equipment requiring third-party safety approval.
SMAJ24CA-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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 10.3A
- 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)
SMAJ24CA-M3/61 FAQ
1.How can I place an order for SMAJ24CA-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ24CA-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 SMAJ24CA-M3/61 reliable?
The price and inventory of SMAJ24CA-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 SMAJ24CA-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ24CA-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ24CA-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ24CA-M3/61?
SMAJ24CA-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ24CA-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 SMAJ24CA-M3/61?
For technical support, including SMAJ24CA-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ24CA-M3/61 requirements.
6.How does Aetrix verify that SMAJ24CA-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ24CA-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 SMAJ24CA-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ24CA-M3/61?
All SMAJ24CA-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ24CA-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 SMAJ24CA-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ24CA-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ24CA-M3/61 Tags
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