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Vishay General Semiconductor - Diodes Division SMA5J12CA-M3/61
- Part No.:
- SMA5J12CA-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J12CA-M3/61.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,904
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Product details
Overview
SMA5J12CA-M3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on signal and power lines. It features a 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR), 500 W peak pulse power (10/1000 µs), clamping voltage of 19.9 V at 25.1 A, and operates from –55 °C to +150 °C junction temperature.
For engineers reviewing the SMA5J12CA-M3/61 datasheet, SMA5J12CA-M3/61 pinout, SMA5J12CA-M3/61 application, or SMA5J12CA-M3/61 equivalent, this device is selected for robust overvoltage protection in automotive sensor interfaces, industrial I/O ports, telecom line cards, and DC power rail conditioning where bidirectional clamping and AEC-Q101-compliant reliability are required.
Technical Context
The SMA5J12CA-M3/61 uses a glass-passivated silicon junction to achieve fast response time (<1 ns) and low incremental surge resistance, enabling effective suppression of ESD, lightning-induced transients, and inductive switching spikes. Its bidirectional architecture provides symmetrical clamping in both polarities without polarity marking.
Rated for 500 W peak pulse power under standardized 10/1000 µs waveform, it delivers 25.1 A peak pulse current with a maximum clamping voltage of 19.9 V - ensuring protected downstream ICs (e.g., CAN transceivers, microcontrollers, ADC front-ends) remain below absolute maximum ratings during surge events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA; defines safe operating margin for 12 V nominal systems. |
| VBR (min/max) | 13.3 V / 14.7 V - Verified breakdown range at 1 mA test current; ensures consistent turn-on across production lots. |
| VC @ IPPM | 19.9 V - Clamping voltage at 25.1 A peak pulse current; limits stress on protected circuitry during worst-case surge. |
| PPPM | 500 W - Peak pulse power handling per 10/1000 µs waveform; supports high-energy transients common in automotive and industrial environments. |
| Junction Temp Range | –55 °C to +150 °C - Enables deployment in under-hood automotive, factory-floor, and outdoor telecom enclosures. |
| Package | SMA (DO-214AC) - Surface-mount package with 5.0 mm × 5.0 mm copper pad thermal layout; supports automated placement and meets MSL Level 1 (260 °C reflow). |
Pinout & Package
Two-terminal bidirectional TVS diode in SMA (DO-214AC) package. No polarity marking; terminals are symmetrical and interchangeable. Case conforms to JEDEC DO-214AC outline with cathode band omitted per bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Surge current path | Both terminals serve as symmetrical clamping nodes; no fixed anode/cathode - enables placement without orientation check. |
| Case (cathode band absent) | Mechanical reference / thermal path | Exposed metal slug acts as thermal conduction path to PCB copper; absence of band confirms bidirectional type per Vishay marking convention. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a), improving clamping precision. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-JEDEC J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance requirements for lead-free assembly. |
| 500 W peak pulse rating | Supports IEC 61000-4-5 Level 4 (4 kV line-to-line, 2 Ω source impedance) compliance when properly laid out on PCB. |
Applications
| Automotive Sensor Protection | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting LIN/CAN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and alternator ripple in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed at connector interface to shunt surge energy before reaching signal conditioning circuitry. Use Value: Maintains signal integrity during 12 V system transients up to 500 W, preventing latch-up or permanent damage to 3.3 V/5 V microcontrollers. | Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges from solenoid coils and motor contactors. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input lines, mounted directly at terminal block entry point. Use Value: Limits transient voltage to ≤19.9 V during 25.1 A surge, preserving optocoupler isolation barriers and MCU GPIO integrity. |
| Telecom Line Card Protection | DC Power Rail Conditioning |
Use Scenario: Shielding Ethernet PHYs and PoE controllers on base station line cards from lightning-induced common-mode surges on RJ45 interfaces. IC Role / Device Role / Timing Role: Bidirectional TVS deployed in differential pair configuration across data lines (e.g., TX+/TX–) to suppress mode conversion. Use Value: Symmetrical clamping prevents signal skew and maintains <1 ns response alignment between paired lines under surge stress. | Use Scenario: Secondary surge suppression on 12 V or 24 V DC distribution rails feeding FPGAs, DSPs, and memory subsystems in embedded computing platforms. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA at 12 V) parallel clamp that remains transparent during normal operation but activates within nanoseconds during overvoltage events. Use Value: Prevents brownout or reset conditions caused by rail collapse during nearby switching noise, supporting uninterrupted operation in mission-critical systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J12CA-E3/61 | Same electrical specs; RoHS-compliant but not halogen-free; uses matte tin plating without halogen-free molding compound. | Approved for commercial-grade industrial use; not qualified for automotive AEC-Q101. | Select when halogen-free requirement is not mandated and cost optimization is prioritized over automotive qualification. |
| SMA5J12CAHM3_A/H | Identical electrical and thermal specs; includes AEC-Q101 qualification and halogen-free construction; packaged in 7" tape with revision code "H". | Required for automotive under-hood applications; supports extended temperature validation and lifetime reliability testing per AEC standard. | Select when automotive qualification and traceable revision control are mandatory for OEM Tier 1 supply chain compliance. |
Compared with SMA5J12CA-M3/61, the E3 variant trades halogen-free compliance for lower cost in non-automotive settings, while the HM3_A/H variant adds AEC-Q101 qualification and controlled revision tracking - making SMA5J12CA-M3/61 the optimal balance of halogen-free compliance, commercial reliability, and broad industrial applicability without automotive overhead.
Availability
SMA5J12CA-M3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line card protection, and DC power rail conditioning requiring stable component supply across multi-year production cycles.
Supply support for SMA5J12CA-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 high-reliability, high-power-density solutions.
The SMA5J series is engineered for high-energy transient suppression in space-constrained surface-mount applications, targeting automotive, industrial, and telecom systems where robustness, consistency, and regulatory compliance (AEC-Q101, RoHS, halogen-free) are critical design requirements.
FAQ
What is the clamping voltage of the SMA5J12CA-M3/61 at its rated peak pulse current?
The SMA5J12CA-M3/61 has a maximum clamping voltage (VC) of 19.9 V at its rated peak pulse current (IPPM) of 25.1 A under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see limited overvoltage stress during surge events. The SMA5J12CA-M3/61 maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C).
Is the SMA5J12CA-M3/61 suitable for automotive applications?
The SMA5J12CA-M3/61 is halogen-free and RoHS-compliant but is not AEC-Q101 qualified. For automotive under-hood or safety-critical applications, Vishay offers the SMA5J12CAHM3_A/H variant, which carries full AEC-Q101 qualification. The SMA5J12CA-M3/61 remains appropriate for non-qualified automotive subsystems such as infotainment power supplies or body-control module peripherals where halogen-free compliance is required but formal qualification is not mandated.
What does the "CA" suffix indicate in SMA5J12CA-M3/61?
The "CA" suffix in SMA5J12CA-M3/61 denotes a bidirectional transient voltage suppressor configuration. Unlike unidirectional variants (e.g., SMA5J12A), the CA version provides symmetrical clamping in both polarities, eliminating the need for polarity-aware placement on PCBs. This makes the SMA5J12CA-M3/61 ideal for AC-coupled lines, differential signaling, and applications where voltage polarity reversal may occur.
What is the thermal resistance of the SMA5J12CA-M3/61, and how does it affect layout?
The SMA5J12CA-M3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures during repeated surge events, PCB layout must provide adequate copper area and thermal vias. Reducing RθJA through enhanced copper pours directly improves sustained surge handling capability of the SMA5J12CA-M3/61.
How does the M3 suffix differ from E3 in the SMA5J12CA-M3/61 part number?
The "M3" suffix in SMA5J12CA-M3/61 indicates halogen-free, RoHS-compliant construction with matte tin-plated leads meeting JESD201 Class 2 whisker resistance. In contrast, the "E3" suffix (e.g., SMA5J12CA-E3/61) denotes RoHS compliance without halogen-free molding compound. Both share identical electrical specifications, but only M3 satisfies strict halogen-free mandates in consumer, medical, and green-electronics programs. The SMA5J12CA-M3/61 thus serves markets requiring full environmental compliance beyond baseline RoHS.
SMA5J12CA-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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 25.1A
- 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)
SMA5J12CA-M3/61 FAQ
1.How can I place an order for SMA5J12CA-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J12CA-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 SMA5J12CA-M3/61 reliable?
The price and inventory of SMA5J12CA-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 SMA5J12CA-M3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J12CA-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J12CA-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J12CA-M3/61?
SMA5J12CA-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J12CA-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 SMA5J12CA-M3/61?
For technical support, including SMA5J12CA-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J12CA-M3/61 requirements.
6.How does Aetrix verify that SMA5J12CA-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J12CA-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 SMA5J12CA-M3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J12CA-M3/61?
All SMA5J12CA-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J12CA-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 SMA5J12CA-M3/61 part is unused and in its original packaging.
Return procedure for SMA5J12CA-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J12CA-M3/61 Tags
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