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Vishay General Semiconductor - Diodes Division SMAJ5.0CA-M3/61
- Part No.:
- SMAJ5.0CA-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ5.0CA-M3/61.pdf
- Description:
- TVS DIODE 5VWM 9.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,550
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Product details
Overview
SMAJ5.0CA-M3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features 5.0 V stand-off voltage (VWM), 6.40–7.25 V breakdown voltage (VBR) at 10 mA test current, 400 W peak pulse power (10/1000 μs), and clamps to ≤9.2 V at 43.5 A peak surge current - ideal for protecting USB, sensor I/O, and low-voltage microcontroller interfaces against ESD and inductive switching spikes.
For engineers reviewing the SMAJ5.0CA-M3/61 datasheet, SMAJ5.0CA-M3/61 pinout, SMAJ5.0CA-M3/61 application, or SMAJ5.0CA-M3/61 equivalent, this device serves as a halogen-free, RoHS-compliant, surface-mount TVS with verified bidirectional clamping behavior, MSL Level 1 moisture sensitivity, and AEC-Q101 qualification path - critical for automotive infotainment, industrial PLC I/O modules, and consumer power management designs requiring robust ±5 V line protection.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping performance in forward and reverse directions per ANSI/IEEE C62.35 standards. Its glass-passivated junction ensures stable VBR tolerance (±5% typical), low incremental surge resistance, and sub-nanosecond response time to transients up to 43.5 A (10/1000 μs).
Thermally, it exhibits RθJA = 120 °C/W and RθJL = 30 °C/W, enabling reliable operation up to TJ = +150 °C when mounted on 5.0 mm × 5.0 mm copper pads. The device sustains 40 A non-repetitive forward surge (8.3 ms half-sine) only in unidirectional variants; SMAJ5.0CA-M3/61 excludes this rating due to bidirectional symmetry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.0 V - maximum continuous reverse voltage before clamping begins; defines safe operating window for 5 V logic and USB 2.0 signal lines. |
| VBR (min/max) | 6.40 V / 7.25 V at IT = 10 mA - verified breakdown threshold ensuring predictable turn-on during overvoltage events. |
| VC @ IPPM | ≤9.2 V at 43.5 A - clamped voltage level that protects downstream ICs rated for ≤10 V absolute maximum input. |
| PPPM | 400 W (10/1000 μs) - energy-handling capacity sufficient for IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge testing. |
| ID @ VWM | ≤800 μA - low leakage preserves signal integrity and battery life in always-on sensor nodes. |
| Package | SMA (DO-214AC) - industry-standard SMD outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height for automated placement. |
| Operating Temp | −55 °C to +150 °C - supports under-hood automotive, industrial motor control, and outdoor IoT deployments. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts surge current in either direction once VBR is exceeded - eliminates orientation concerns during PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating differential lines (e.g., RS-485, CAN bus, audio inputs) without external polarity management. |
| 400 W peak pulse power | Withstands repeated 10/1000 μs surges up to 43.5 A - meets IEC 61000-4-5 Ed. 3 requirements for industrial equipment ports. |
| Halogen-free & RoHS-compliant (M3 suffix) | Complies with IPC-1752A material declarations and EU Directive 2011/65/EU - supports green manufacturing and export compliance. |
| MSL Level 1 (260 °C peak reflow) | Allows standard lead-free soldering without pre-baking - reduces production cost and avoids moisture-induced popcorn failure. |
| Low clamping ratio (VC/VBR ≈ 1.3) | Minimizes let-through voltage stress on protected ICs - critical for safeguarding 5 V tolerant GPIOs and analog front-ends. |
Applications
| USB 2.0 Data Lines | Automotive Sensor I/O |
|---|---|
|
Use Scenario: Protecting D+ and D− pins of USB host/device controllers from ESD (±15 kV contact) and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector, shunting transients before they reach PHY or controller silicon. Use Value: Maintains signal integrity below 9.2 V clamping while supporting full-speed 480 Mbps data rates due to low junction capacitance (<100 pF at 0 V). |
Use Scenario: Safeguarding analog outputs (e.g., 0–5 V throttle position sensor) and digital inputs (e.g., Hall-effect switch) in engine control units. IC Role / Device Role / Timing Role: Primary overvoltage suppression element on sensor harnesses exposed to load dump and alternator ripple. Use Value: Survives −55 °C to +150 °C ambient and clamps 100 V transients within 1 ns - prevents latch-up or gate oxide damage in MCU ADC inputs. |
| Industrial PLC Digital Inputs | Consumer Power Adapter Feedback Loops |
|
Use Scenario: Shielding 24 V DC digital input channels from relay coil flyback, motor commutation noise, and field wiring surges. IC Role / Device Role / Timing Role: First-line transient absorber located between terminal block and optocoupler input stage. Use Value: 400 W rating handles repetitive 10/1000 μs surges common in factory automation; low leakage avoids false triggering of high-impedance inputs. |
Use Scenario: Protecting TL431 reference voltage feedback node in isolated AC/DC adapters against output overvoltage faults. IC Role / Device Role / Timing Role: Precision clamping device limiting feedback voltage to prevent uncontrolled PWM duty cycle escalation. Use Value: Tight VBR tolerance (6.40–7.25 V) ensures accurate trip point; bidirectional symmetry accommodates AC-coupled compensation networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0A-M3/61 | Unidirectional variant; same VWM, VBR, and PPPM but conducts only in reverse bias - requires correct cathode orientation. | Applicable where circuit ground reference is fixed and polarity is known (e.g., DC power rail protection). | Select SMAJ5.0A-M3/61 only if design uses dedicated ground-referenced clamping and can guarantee consistent PCB orientation. |
| SMBJ5.0CA-T3 | Same electrical specs but in larger SMB (DO-214AA) package - 5.28 mm × 4.57 mm vs. SMA's 4.50 mm × 2.29 mm; higher thermal mass. | Better suited for high-power industrial modules where board space allows and thermal derating margin is prioritized over footprint. | Choose SMBJ5.0CA-T3 when junction temperature rise must stay below 100 °C under sustained 300 ms surges - SMAJ5.0CA-M3/61 has higher RθJA. |
Compared with SMAJ5.0A-M3/61, the bidirectional SMAJ5.0CA-M3/61 eliminates orientation risk but sacrifices unidirectional surge current capability; versus SMBJ5.0CA-T3, it trades thermal robustness for compactness - making SMAJ5.0CA-M3/61 optimal for space-constrained, polarity-agnostic 5 V interface protection.
Availability
SMAJ5.0CA-M3/61 is available at Aetrix Electronics and suitable for USB interface protection, automotive sensor conditioning, industrial PLC input stages, and consumer power supply feedback loop safeguarding requiring stable component supply and halogen-free compliance.
Supply support for SMAJ5.0CA-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series targets board-level transient protection in automotive, industrial, and computing systems - engineered for fast response, repeatable clamping, and compatibility with automated SMT assembly processes.
FAQ
What is the maximum clamping voltage of SMAJ5.0CA-M3/61 at its rated peak pulse current?
The SMAJ5.0CA-M3/61 clamps to a maximum of 9.2 V at its specified peak pulse current of 43.5 A (10/1000 μs waveform). This value is measured under standardized test conditions per ANSI/IEEE C62.35 and guarantees that downstream 5 V logic circuits remain within safe operating limits during surge events. The clamping voltage is confirmed in the Vishay datasheet Document Number 88390, Table on page 2.
Is SMAJ5.0CA-M3/61 suitable for automotive applications requiring AEC-Q101 qualification?
SMAJ5.0CA-M3/61 itself is not AEC-Q101 qualified; however, Vishay offers the functionally identical SMAJ5.0CAHM3_A/H variant (halogen-free, RoHS-compliant, and AEC-Q101 qualified) with the same electrical specifications and SMA package. For automotive-grade deployment, engineers should specify the HM3_X suffix version - SMAJ5.0CA-M3/61 is intended for commercial and industrial use where AEC-Q101 is not mandated.
How does the bidirectional nature of SMAJ5.0CA-M3/61 affect PCB layout compared to unidirectional TVS diodes?
The bidirectional nature of SMAJ5.0CA-M3/61 removes polarity constraints during placement - there is no cathode band or orientation requirement, unlike unidirectional variants such as SMAJ5.0A-M3/61. This simplifies PCB layout, eliminates risk of reverse installation, and enables direct replacement in AC-coupled or floating signal paths (e.g., RS-485, CAN, audio lines) without redesigning trace routing or silkscreen markings.
What is the thermal resistance profile of SMAJ5.0CA-M3/61, and how does it impact power dissipation in real-world layouts?
SMAJ5.0CA-M3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W when mounted on minimum recommended 5.0 mm × 5.0 mm copper pads. In compact consumer PCBs with limited copper area, actual RθJA may exceed 150 °C/W - limiting sustained power handling. For reliable long-term operation above 1 W average dissipation, thermal vias and enlarged pads are strongly advised to maintain TJ < 125 °C.
Can SMAJ5.0CA-M3/61 be used to protect 3.3 V logic interfaces?
No - SMAJ5.0CA-M3/61 is not recommended for 3.3 V logic protection because its 5.0 V stand-off voltage (VWM) exceeds typical 3.3 V IO absolute maximum ratings (often 3.6–4.0 V), risking premature conduction during normal operation. For 3.3 V rails, Vishay's SMAJ3.3CA-M3/61 (VWM = 3.3 V, VBR = 4.0–4.44 V) is the appropriate variant, offering matched clamping behavior and identical package compatibility.
SMAJ5.0CA-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):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.2V
- Current - Peak Pulse (10/1000µs):
- 43.5A
- 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)
SMAJ5.0CA-M3/61 FAQ
1.How can I place an order for SMAJ5.0CA-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ5.0CA-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 SMAJ5.0CA-M3/61 reliable?
The price and inventory of SMAJ5.0CA-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 SMAJ5.0CA-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ5.0CA-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ5.0CA-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ5.0CA-M3/61?
SMAJ5.0CA-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ5.0CA-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 SMAJ5.0CA-M3/61?
For technical support, including SMAJ5.0CA-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ5.0CA-M3/61 requirements.
6.How does Aetrix verify that SMAJ5.0CA-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ5.0CA-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 SMAJ5.0CA-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ5.0CA-M3/61?
All SMAJ5.0CA-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ5.0CA-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 SMAJ5.0CA-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ5.0CA-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ5.0CA-M3/61 Tags
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