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Vishay General Semiconductor - Diodes Division SMA5J30CAHM3_A/I
- Part No.:
- SMA5J30CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J30CAHM3_A/I.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,617
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Product details
Overview
SMA5J30CAHM3_A/I 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 30 V stand-off voltage (VWM), 48.4 V clamping voltage (VC) at 10.3 A peak pulse current (IPPM), 500 W peak pulse power (10/1000 µs), and operates from −55 °C to +150 °C - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J30CAHM3_A/I datasheet, SMA5J30CAHM3_A/I pinout, SMA5J30CAHM3_A/I application, or SMA5J30CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device uses a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance, enabling effective suppression of ESD, lightning-induced transients, and inductive switching spikes. Its bidirectional symmetry ensures identical clamping behavior in both polarities, eliminating polarity concerns in AC-coupled or floating signal paths.
The SMA5J30CAHM3_A/I is rated for 500 W peak pulse power under standardized 10/1000 µs waveform conditions, with thermal resistance of 80 °C/W (junction-to-ambient) and 25 °C/W (junction-to-lead), supporting reliable operation under repeated surge events when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR min/max | 33.3 V / 36.8 V - breakdown voltage range at 1 mA test current; ensures predictable turn-on threshold across production lot. |
| VC @ IPPM | 48.4 V at 10.3 A - maximum clamped voltage during 500 W surge; determines worst-case overvoltage seen by downstream ICs. |
| PPPM | 500 W - peak pulse power handling (10/1000 µs); supports robust protection against IEC 61000-4-5 Level 4 surges. |
| TJ max | +150 °C - maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments. |
| Package | SMA (DO-214AC) - surface-mount package with 5.28 mm × 4.50 mm footprint; compatible with standard reflow profiles and J-STD-020 MSL level 1. |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical terminals - bidirectional operation means either terminal serves as anode or cathode depending on transient polarity. |
| Case | Thermal and mechanical interface | Plastic body provides electrical isolation; copper pad mounting required for thermal dissipation and surge current handling. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), and floating sensors without polarity constraints. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control modules, ADAS sensor interfaces, and infotainment power rails. |
| Halogen-free & RoHS-compliant | Meets global environmental regulations and supports lead-free reflow assembly with peak temperature up to 260 °C. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), improving protection margin for sensitive CMOS inputs. |
| MSL Level 1 rating | Allows unlimited floor life and standard SMT handling without dry-pack or baking requirements. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt surge energy before reaching signal conditioning circuitry. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surges while meeting AEC-Q101 reliability requirements. |
Use Scenario: Safeguarding PLC digital input modules and fieldbus interfaces (e.g., Profibus, Modbus RTU) against induced surges from nearby motor switching. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on 24 V DC input lines, coordinated with upstream fusing and filtering. Use Value: Limits clamped voltage to ≤48.4 V, ensuring downstream optocouplers and microcontrollers remain within absolute maximum ratings. |
| Consumer Power Adapter Input | Telecom Line Card Protection |
Use Scenario: Secondary-side surge protection on 12–24 V DC outputs of wall adapters and power supplies used in smart home hubs and IoT gateways. IC Role / Device Role / Timing Role: Final-stage TVS placed after DC-DC regulation to absorb residual transients escaping primary-side protection. Use Value: Prevents latch-up or gate oxide damage in USB-PD controllers and PMICs with tight VIN tolerances. |
Use Scenario: Protecting Ethernet PHYs and DSL line drivers from lightning-induced surges entering via RJ-45 jacks in residential gateways and base stations. IC Role / Device Role / Timing Role: Common-mode TVS pair (one per differential pair) mounted adjacent to magnetics to clamp mode conversion transients. Use Value: Delivers 500 W surge handling with <1 ns response, preserving signal fidelity up to 100 MHz while meeting GR-1089-CORE telecom standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J30CAHE3_A/I | Same electrical specs and package, but RoHS-compliant commercial grade (not AEC-Q101 qualified); uses E3 suffix instead of HM3. | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select SMA5J30CAHE3_A/I when cost sensitivity outweighs automotive reliability requirements and halogen-free content is not required. |
| SMA6J30CA-M3 | Higher 600 W PPPM rating, same VWM/VC, but in larger SMA package variant with different thermal resistance (RθJA = 70 °C/W). | Supports higher surge repetition rates and longer pulse durations due to improved thermal mass and lower RθJA. | Choose SMA6J30CA-M3 where system-level surge testing exceeds IEC 61000-4-5 Level 4 or requires extended duty-cycle operation. |
Compared with SMA5J30CAHE3_A/I, the SMA5J30CAHM3_A/I adds AEC-Q101 qualification and halogen-free construction; versus SMA6J30CA-M3, it trades 100 W lower peak power for tighter board space and standard SMA footprint compatibility.
Availability
SMA5J30CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O protection, and telecom line card designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SMA5J30CAHM3_A/I 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 and automotive-grade performance.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained SMT applications, targeting automotive, industrial, and telecom systems where robustness and AEC-Q101 compliance are mandatory.
FAQ
What does the "HM3" suffix indicate in SMA5J30CAHM3_A/I?
The "HM3" suffix in SMA5J30CAHM3_A/I denotes halogen-free, RoHS-compliant construction with full AEC-Q101 qualification. It confirms compliance with automotive reliability standards including temperature cycling, highly accelerated life testing (HALT), and ESD immunity per JESD22-A114, distinguishing it from commercial-grade variants like E3 or HE3.
Is SMA5J30CAHM3_A/I suitable for protecting RS-485 communication lines?
Yes, SMA5J30CAHM3_A/I is well-suited for RS-485 line protection due to its bidirectional clamping, 48.4 V clamping voltage at 10.3 A, and sub-nanosecond response time. When placed across differential pairs near connectors, it limits surge-induced common-mode overvoltage while maintaining signal integrity up to 20 Mbps - verified in Vishay's application notes for industrial data links.
What is the maximum PCB pad size recommended for optimal thermal performance of SMA5J30CAHM3_A/I?
Vishay specifies 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for SMA5J30CAHM3_A/I to achieve rated 500 W peak pulse power and thermal resistance of 80 °C/W. Reducing pad area below this de-rates power handling significantly - e.g., 0.1" × 0.1" pads reduce IPPM by ~35% per Figure 2 in the datasheet.
Does SMA5J30CAHM3_A/I have polarity markings on the package?
No, SMA5J30CAHM3_A/I has no polarity markings because it is a bidirectional TVS diode. The SMA (DO-214AC) package appears symmetric with no cathode band or other orientation indicators - both terminals are functionally identical, simplifying layout and eliminating risk of reverse installation.
How does the clamping voltage of SMA5J30CAHM3_A/I compare to its unidirectional counterpart SMA5J30A?
SMA5J30CAHM3_A/I and SMA5J30A share identical clamping voltage (48.4 V at 10.3 A) and breakdown characteristics, as confirmed in Table 1 of the datasheet. The "CA" suffix indicates bidirectionality only - all electrical parameters including VC, VBR, and PPPM are matched between unidirectional and bidirectional versions within the same voltage grade.
SMA5J30CAHM3_A/I 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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 10.3A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J30CAHM3_A/I FAQ
1.How can I place an order for SMA5J30CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J30CAHM3_A/I 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 SMA5J30CAHM3_A/I reliable?
The price and inventory of SMA5J30CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J30CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMA5J30CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J30CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J30CAHM3_A/I?
SMA5J30CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J30CAHM3_A/I 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 SMA5J30CAHM3_A/I?
For technical support, including SMA5J30CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J30CAHM3_A/I requirements.
6.How does Aetrix verify that SMA5J30CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMA5J30CAHM3_A/I 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 SMA5J30CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMA5J30CAHM3_A/I?
All SMA5J30CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J30CAHM3_A/I, 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 SMA5J30CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMA5J30CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J30CAHM3_A/I Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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