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Vishay General Semiconductor - Diodes Division SMA5J30CAHM3/I
- Part No.:
- SMA5J30CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J30CAHM3/I.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,906
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Product details
Overview
SMA5J30CAHM3/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 maximum clamping voltage at 10.3 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - used to protect automotive sensor interfaces, industrial I/O ports, and telecom line drivers against ESD and load dump transients.
For engineers reviewing the SMA5J30CAHM3/I datasheet, SMA5J30CAHM3/I pinout, SMA5J30CAHM3/I application, or SMA5J30CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and compatibility with automated SMT assembly on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during overvoltage events, leveraging an avalanche breakdown mechanism with symmetrical forward/reverse characteristics due to its bidirectional construction. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1 µA at 30 V) across -55 °C to +150 °C operating range.
The SMA5J30CAHM3/I delivers consistent clamping performance under repetitive 10/1000 µs surges up to 500 W, with thermal resistance of 80 °C/W (junction-to-ambient) and 25 °C/W (junction-to-lead), enabling reliable operation on standard PCB layouts without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 24 V nominal systems. |
| 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 - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to <49 V under worst-case transient. |
| PPPM | 500 W - Peak pulse power handling per 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 (4 kV) surge immunity. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments and industrial enclosures. |
| Package | SMA (DO-214AC) - Surface-mount package with 5.28 mm × 4.50 mm footprint and 2.29 mm height; compatible with J-STD-020 MSL level 1 reflow. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
SMA (DO-214AC) package: two-terminal, non-polarized surface-mount device. Bidirectional construction means no cathode/anode marking; terminals are symmetric and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (both) | Surge current path | Current flows bidirectionally through either terminal during overvoltage; no polarity dependency simplifies PCB layout. |
| Case | Thermal and mechanical interface | Plastic body provides UL 94 V-0 flammability rating; leads are matte tin plated for solderability per J-STD-002. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., RS-485, CAN FD) without polarity concerns. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control modules and ADAS sensor interfaces requiring long-term field reliability. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for EU, China RoHS, and JEITA standards; no brominated flame retardants in molding compound. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving protection margin for 3.3 V/5 V logic. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (peak 260 °C) without baking, reducing manufacturing overhead. |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and pressure sensor outputs in engine bay modules exposed to load dump and jump-start surges. IC Role / Device Role: Bidirectional TVS placed between signal line and ground to clamp transients before reaching ASIC input pins. Use Value: Limits clamped voltage to 48.4 V while absorbing 500 W pulses, preventing latch-up or gate oxide damage in 3.3 V/5 V sensor interface ICs. |
Use Scenario: Safeguarding PLC analog input channels (0–10 V, 4–20 mA) against induced surges from nearby motor contactors or lightning coupling. IC Role / Device Role: Primary overvoltage clamp on field-side signal traces, coordinated with series impedance and filtering. Use Value: Maintains system-level IEC 61000-4-5 compliance with minimal BOM count; VWM = 30 V avoids false triggering during normal 24 V supply operation. |
| Telecom Line Driver Protection | Consumer USB/Type-C Port Protection |
Use Scenario: Shielding RS-485 transceivers in base station backhaul links from EFT and surge events on long cable runs. IC Role / Device Role: Differential-line TVS connected across A/B bus lines and to ground, exploiting symmetrical clamping. Use Value: Bidirectional response ensures equal protection regardless of transient polarity; 48.4 V VC prevents receiver saturation during 1 kV EFT bursts. |
Use Scenario: Secondary-level surge suppression on USB VBUS and CC lines in portable docking stations subject to hot-plug and cable discharge events. IC Role / Device Role: Standoff-rated TVS placed after primary fuse and upstream of load switch, targeting fast ESD (IEC 61000-4-2 ±15 kV). Use Value: Sub-1 µs response time and <1 µA leakage at 30 V preserve battery life and prevent false VBUS detection in USB PD negotiation. |
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/I | Same electrical specs and package, but RoHS-compliant commercial grade (not AEC-Q101 qualified); uses standard SnPb-free plating without halogen-free compound. | Approved for industrial/commercial use only; not validated for automotive temperature cycling or humidity tests. | Select when AEC-Q101 is not required and cost optimization is prioritized over automotive qualification. |
| SMBJ30CAHM3 | Same VWM (30 V) and bidirectional function, but SMB (DO-214AA) package - 5.28 mm × 4.50 mm vs. SMA's 4.93 mm × 3.99 mm; 600 W PPPM rating. | Higher power handling allows longer surge duration support; larger footprint may conflict with dense layouts. | Choose when higher surge energy (e.g., ISO 7637-2 pulse 5a) must be absorbed and board space permits SMB size. |
Compared with SMA5J30CAHE3/I, the SMA5J30CAHM3/I adds AEC-Q101 qualification and halogen-free compliance for automotive use; compared with SMBJ30CAHM3, it trades 100 W peak power for smaller footprint and identical clamping performance in space-constrained designs.
Availability
SMA5J30CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line driver circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMA5J30CAHM3/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 reliability, efficiency, and application-specific optimization.
The SMA5J series is engineered for high-power-density transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of the SMA5J30CAHM3/I under a 10/1000 µs surge?
The SMA5J30CAHM3/I has a maximum clamping voltage (VC) of 48.4 V at 10.3 A peak pulse current under a 10/1000 µs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 0.2" × 0.2" copper pads), and represents the upper limit of voltage seen by protected circuitry during surge events. The SMA5J30CAHM3/I maintains this clamping performance consistently across its qualified temperature range.
Is the SMA5J30CAHM3/I suitable for automotive applications?
Yes, the SMA5J30CAHM3/I is AEC-Q101 qualified and specifically designated for automotive use via the HM3 suffix, indicating halogen-free, RoHS-compliant construction and full qualification for temperature cycling, HTRB, and ESD testing. It is deployed in engine control units, ADAS camera modules, and body electronics where sustained operation at +150 °C junction temperature and immunity to load dump transients are required. The SMA5J30CAHM3/I meets these requirements without derating.
How does the bidirectional design of the SMA5J30CAHM3/I affect circuit layout?
The SMA5J30CAHM3/I has no polarity marking and functions identically in both directions, eliminating the need to orient the device during placement. This simplifies PCB layout for AC-coupled or differential interfaces like RS-485, CAN FD, or Ethernet PHY lines, where transient polarity is unpredictable. Layout requires only symmetric 0.2" × 0.2" copper pads per terminal and no additional polarity-aware routing - a direct benefit of the SMA5J30CAHM3/I's symmetrical avalanche structure.
What is the maximum leakage current of the SMA5J30CAHM3/I at its stand-off voltage?
The SMA5J30CAHM3/I exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 30 V stand-off voltage (VWM), measured at TA = 25 °C. This ultra-low leakage ensures minimal power loss and signal integrity impact in always-on circuits such as automotive LIN bus nodes or industrial 4–20 mA loops. The SMA5J30CAHM3/I maintains leakage below 5 µA even at +85 °C ambient, supporting wide-temperature deployment.
Does the SMA5J30CAHM3/I require special handling during reflow soldering?
No - the SMA5J30CAHM3/I is rated MSL Level 1 per J-STD-020 and supports standard lead-free reflow profiles with a maximum peak temperature of 260 °C. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102, ensuring reliable wetting and joint formation without pre-baking or dry-pack requirements. This simplifies manufacturing integration and reduces process risk for the SMA5J30CAHM3/I in high-volume SMT lines.
SMA5J30CAHM3/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:
- Discontinued at Digi-Key
- 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/I FAQ
1.How can I place an order for SMA5J30CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J30CAHM3/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/I reliable?
The price and inventory of SMA5J30CAHM3/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/I is usually 5 days.
3.What payment methods are accepted for SMA5J30CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J30CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J30CAHM3/I?
SMA5J30CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J30CAHM3/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/I?
For technical support, including SMA5J30CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J30CAHM3/I requirements.
6.How does Aetrix verify that SMA5J30CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMA5J30CAHM3/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/I meets industry standards.
7.What is the process for return or replacement of SMA5J30CAHM3/I?
All SMA5J30CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J30CAHM3/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/I part is unused and in its original packaging.
Return procedure for SMA5J30CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J30CAHM3/I Tags
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