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Vishay General Semiconductor - Diodes Division SMA5J28CA-M3/61
- Part No.:
- SMA5J28CA-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J28CA-M3/61.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,289
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Product details
Overview
SMA5J28CA-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 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR), 45.4 V clamping voltage (VC) at 11.0 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, sensor interfaces, and automotive ECUs against ESD and load dump transients.
For engineers reviewing the SMA5J28CA-M3/61 datasheet, SMA5J28CA-M3/61 pinout, SMA5J28CA-M3/61 application, or SMA5J28CA-M3/61 equivalent, key selection criteria include bidirectional clamping capability, halogen-free RoHS compliance (M3 suffix), 150 °C max junction temperature, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transient events, leveraging an avalanche breakdown mechanism to divert surge current away from protected circuitry. Its bidirectional symmetry ensures identical clamping behavior in both polarities, with no polarity marking required on the SMA package.
It delivers stable performance under repetitive surge stress when mounted per recommended pad layout, with thermal resistance of 80 °C/W (junction-to-ambient) and 25 °C/W (junction-to-lead), enabling reliable operation up to 150 °C junction temperature in industrial and automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 31.1 V / 34.4 V at 1 mA - guaranteed avalanche initiation range for design margining |
| VC @ IPPM | 45.4 V at 11.0 A - peak clamped voltage limiting stress on downstream ICs |
| PPPM | 500 W - surge energy handling capacity with 10/1000 µs waveform |
| IPPM | 11.0 A - maximum non-repetitive surge current the device safely conducts |
| TJ max | 150 °C - enables use in under-hood automotive and industrial power supply rails |
| Package | SMA (DO-214AC) - surface-mount footprint compatible with standard reflow profiles |
Pinout & Package
SMA5J28CA-M3/61 uses the SMA (DO-214AC) package: molded plastic case with two coplanar leads, UL 94 V-0 rated, matte tin-plated terminals solderable per J-STD-002. Bidirectional construction means no cathode band marking; terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Either terminal serves as input/output - bidirectional clamping requires no orientation during placement |
| Case (plastic body) | Thermal and mechanical interface | No electrical connection; provides mechanical anchoring and contributes to thermal dissipation via PCB copper pads |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 500 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly laid out |
| Halogen-free & RoHS-compliant (M3) | Meets environmental compliance requirements for automotive and industrial end equipment |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly processes without moisture sensitivity handling |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a) |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed control modules from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: TVS diode placed at power entry point to clamp surges before reaching LDOs and microcontrollers. Use Value: Clamps 28 V nominal rail to ≤45.4 V during 11 A transients, preventing latch-up or overvoltage damage to downstream SMA5J28CA-M3/61-protected circuitry. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Bidirectional shunt element across differential or single-ended signal pairs to ground. Use Value: Symmetric clamping preserves signal integrity on bidirectional buses while limiting transient-induced offset errors in precision ADC front-ends. |
| Telecom Line Interface Protection | Consumer USB/Type-C Port Protection |
Use Scenario: Safeguarding Ethernet PHY or RS-485 transceivers connected to unshielded outdoor cabling. IC Role / Device Role / Timing Role: Primary surge suppression stage ahead of secondary filtering and common-mode chokes. Use Value: Withstands repeated 500 W surges without degradation, maintaining VWM stability over lifetime in telecom base station backhaul links. | Use Scenario: Adding robustness to USB 2.0 data lines and VBUS against human-body-model (HBM) ESD and hot-plug transients. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF typical) TVS placed directly at connector to minimize stub length. Use Value: Fast response time and low VC prevent data corruption during ±8 kV contact ESD events per IEC 61000-4-2, preserving link reliability in consumer docking stations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J28A-M3/61 | Unidirectional version - includes cathode band marking and forward voltage drop (~3.5 V @ 25 A) | Requires polarity-aware layout; unsuitable for AC or floating signals | Select only if protecting DC rails with known polarity and needing lower forward conduction loss |
| SMBJ28CA-M3/61 | Same VWM/VC, but SMB (DO-214AA) package - 20 % larger footprint, 10 % higher PPPM (600 W) | Higher thermal mass allows longer surge duration tolerance; less suitable for ultra-dense layouts | Choose when board space permits and higher surge margin is needed beyond 500 W |
Compared with SMA5J28A-M3/61, SMA5J28CA-M3/61 eliminates polarity constraints for flexible routing; compared with SMBJ28CA-M3/61, it saves PCB area while maintaining full IEC 61000-4-5 compliance for most 12 V systems - making it optimal for space-constrained automotive and industrial modules.
Availability
SMA5J28CA-M3/61 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom line cards, and consumer USB port protection requiring stable component supply and halogen-free compliance.
Supply support for SMA5J28CA-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, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMA5J series is engineered for high-power-density transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where compact size, AEC-Q101 readiness, and repeatable clamping behavior are critical.
FAQ
What does the "CA" suffix mean in SMA5J28CA-M3/61?
The "CA" suffix in SMA5J28CA-M3/61 indicates a bidirectional configuration - meaning the device clamps transient voltages symmetrically in both polarities, with no cathode marking required. This differs from unidirectional variants (e.g., SMA5J28A-M3/61) that feature a band-marked cathode and conduct forward current. SMA5J28CA-M3/61 is ideal for protecting AC-coupled or floating signal paths where polarity reversal may occur.
Is SMA5J28CA-M3/61 AEC-Q101 qualified?
No, SMA5J28CA-M3/61 is not AEC-Q101 qualified. It carries the M3 suffix denoting halogen-free and RoHS-compliant commercial-grade construction. For AEC-Q101 qualification, the correct ordering code is SMA5J28CAHM3_A/H or SMA5J28CAHM3_A/I - which include additional automotive-grade screening and traceability. Always verify the full part number's qualification status using Vishay's official documentation before automotive deployment.
What is the maximum clamping voltage of SMA5J28CA-M3/61 and how is it measured?
The maximum clamping voltage (VC) of SMA5J28CA-M3/61 is 45.4 V, measured at a peak pulse current (IPPM) of 11.0 A using a 10/1000 µs double-exponential waveform per IEC 61000-4-5. This value represents the highest voltage the device allows across its terminals during surge conduction - a critical parameter for ensuring downstream ICs remain within absolute maximum ratings. The test assumes mounting on 0.2" × 0.2" copper pads per Vishay's recommended layout.
Can SMA5J28CA-M3/61 be used in place of SMA5J28A-M3/61?
SMA5J28CA-M3/61 is not a direct replacement for SMA5J28A-M3/61 due to fundamental functional differences: SMA5J28CA-M3/61 is bidirectional, while SMA5J28A-M3/61 is unidirectional with defined anode/cathode polarity. Substitution requires verifying that the circuit does not rely on forward conduction or polarity-sensitive clamping. In DC-only applications with fixed polarity, SMA5J28A-M3/61 may offer lower forward voltage; SMA5J28CA-M3/61 should only replace it where bidirectional protection is explicitly needed.
What is the thermal resistance of SMA5J28CA-M3/61 and why does it matter?
SMA5J28CA-M3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W and junction-to-lead resistance (RθJL) of 25 °C/W. These values determine how effectively heat generated during surge events dissipates into the PCB. Lower RθJL supports short-duration high-current pulses, while RθJA governs steady-state temperature rise - both essential for maintaining reliability at 150 °C max junction temperature. Proper copper pad sizing per Vishay's layout guidelines is required to achieve these ratings.
SMA5J28CA-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):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 11A
- 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)
SMA5J28CA-M3/61 FAQ
1.How can I place an order for SMA5J28CA-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J28CA-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 SMA5J28CA-M3/61 reliable?
The price and inventory of SMA5J28CA-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 SMA5J28CA-M3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J28CA-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J28CA-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J28CA-M3/61?
SMA5J28CA-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J28CA-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 SMA5J28CA-M3/61?
For technical support, including SMA5J28CA-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J28CA-M3/61 requirements.
6.How does Aetrix verify that SMA5J28CA-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J28CA-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 SMA5J28CA-M3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J28CA-M3/61?
All SMA5J28CA-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J28CA-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 SMA5J28CA-M3/61 part is unused and in its original packaging.
Return procedure for SMA5J28CA-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J28CA-M3/61 Tags
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