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Vishay General Semiconductor - Diodes Division SMA5J24CAHM3_A/I
- Part No.:
- SMA5J24CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J24CAHM3_A/I.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,003
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Product details
Overview
SMA5J24CAHM3_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 24 V stand-off voltage (VWM), 38.9 V maximum clamping voltage (VC) at 12.9 A peak pulse current (IPPM), and 500 W peak pulse power (10/1000 µs waveform), commonly deployed in automotive sensor interface protection.
For engineers reviewing the SMA5J24CAHM3_A/I datasheet, SMA5J24CAHM3_A/I pinout, SMA5J24CAHM3_A/I application, or SMA5J24CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and compatibility with automated SMT placement on PCBs requiring robust ESD and lightning surge immunity.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche breakdown junction to limit reverse voltage across protected circuits. Its bidirectional symmetry ensures identical clamping behavior in both polarities, with no polarity marking required on the SMA package.
Thermal performance is defined by RθJA = 80 °C/W and RθJL = 25 °C/W, enabling reliable operation up to TJ = 150 °C. It meets J-STD-020 MSL Level 1 and is qualified to AEC-Q101 for automotive under-hood and infotainment applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 26.7 V / 29.5 V - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 38.9 V - Clamped voltage seen by protected circuit during 12.9 A 10/1000 µs surge |
| PPPM | 500 W - Peak surge power handling capacity under standardized waveform |
| IPPM | 12.9 A - Maximum non-repetitive surge current the device safely clamps without failure |
| TJ max | 150 °C - Maximum junction temperature for continuous operation and reliability validation |
| Package | SMA (DO-214AC) - Surface-mount package with 5.28 mm × 4.50 mm footprint, optimized for high-density layouts |
Pinout & Package
SMA (DO-214AC) package: two-terminal, symmetrical, unmarked bidirectional device; no cathode band or polarity indicator. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Either terminal serves as input/output for bidirectional surge current; no fixed polarity |
| Case (body) | Thermal and mechanical interface | Plastic-molded body provides UL 94 V-0 flammability rating and thermal path to PCB copper pads |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental regulations and enables use in green manufacturing supply chains |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for downstream ICs |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow at 260 °C peak without baking preconditioning |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Protection |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs against load dump and ISO 7637-2 pulses in engine control modules. IC Role / Device Role / Timing Role: Voltage clamping element placed directly at connector entry point to shunt surge energy before reaching PHY layer. Use Value: Maintains signal integrity under 500 W surges while holding clamped voltage below 38.9 V, preventing transceiver latch-up or damage. |
Use Scenario: Safeguarding differential CAN_H/CAN_L lines in factory automation gateways exposed to motor drive noise. IC Role / Device Role / Timing Role: Bidirectional TVS pair (one per line) absorbing common-mode transients induced by nearby VFD switching. Use Value: Symmetrical clamping ensures equal protection on both lines, preserving differential signaling margins during 12.9 A surges. |
| Consumer Power Adapter Input | Telecom Ethernet Port Protection |
Use Scenario: Secondary-side DC output protection in USB-C PD adapters subjected to hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Final-stage clamp on regulated 24 V rail, limiting overvoltage to safeguard connected devices. Use Value: Fast response time and low VC prevent brownout or reset of powered peripherals during transient events. |
Use Scenario: Surge suppression on RJ45 magnetics secondary side in PoE-powered access points. IC Role / Device Role / Timing Role: Bidirectional clamp across data pairs to absorb lightning-induced common-mode surges per IEC 61000-4-5. Use Value: Withstands 500 W surges while maintaining <1 pF junction capacitance impact on 100BASE-TX signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J24CAHE3_A/I | Same electrical specs; RoHS-compliant but not halogen-free; lacks HM3 material certification | Suitable for commercial-grade automotive modules where halogen-free requirement is not enforced | Select when cost sensitivity outweighs halogen-free mandate and AEC-Q101 remains required |
| SMCJ24CA | Higher PPPM = 1500 W; larger SMC (DO-214AB) package; same VWM/VC ratings | Used where higher surge margin is needed and board space allows larger footprint | Choose when system-level testing requires >500 W immunity and thermal derating headroom is critical |
Compared with SMA5J24CAHM3_A/I, SMA5J24CAHE3_A/I offers identical AEC-Q101 qualification but omits halogen-free compliance, while SMCJ24CA delivers triple the surge power in a larger package-enabling trade-offs between board area, environmental compliance, and robustness.
Availability
SMA5J24CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, and telecom Ethernet port protection requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMA5J24CAHM3_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 reliability and application-specific optimization.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained automotive and industrial environments, balancing clamping performance, thermal efficiency, and manufacturability.
FAQ
What does the "HM3" suffix indicate in SMA5J24CAHM3_A/I?
The HM3 suffix in SMA5J24CAHM3_A/I denotes halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance, and AEC-Q101 qualification. It confirms compliance with automotive environmental and reliability standards beyond baseline commercial-grade versions like E3 or M3.
Is SMA5J24CAHM3_A/I suitable for protecting 24 V CAN FD networks?
Yes, SMA5J24CAHM3_A/I is suitable for 24 V CAN FD network protection. Its 24 V VWM aligns with nominal bus voltage, and its 38.9 V VC stays well below typical CAN transceiver absolute maximum ratings. Bidirectional operation supports differential line protection without polarity constraints.
Does SMA5J24CAHM3_A/I require a heatsink for 500 W surge handling?
No, SMA5J24CAHM3_A/I does not require an external heatsink for single-event 500 W surge handling. Its thermal design relies on short-duration pulse dissipation into PCB copper pads (per 0.2" × 0.2" pad layout), with RθJA = 80 °C/W sufficient for transient conditions-not continuous power.
How does SMA5J24CAHM3_A/I differ from unidirectional SMA5J24A variants?
SMA5J24CAHM3_A/I is bidirectional with symmetric clamping in both polarities and no cathode marking, whereas SMA5J24A is unidirectional with a cathode band and forward conduction capability. The "CA" suffix explicitly defines bidirectional functionality, making SMA5J24CAHM3_A/I appropriate for AC or floating signal paths.
What is the maximum reverse leakage current for SMA5J24CAHM3_A/I at 24 V?
The maximum reverse leakage current (ID) for SMA5J24CAHM3_A/I at VWM = 24 V is 1.0 µA at TA = 25 °C, as specified in the Vishay datasheet. This low leakage ensures minimal power loss and signal distortion in always-on monitoring circuits.
SMA5J24CAHM3_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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 12.9A
- 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)
SMA5J24CAHM3_A/I FAQ
1.How can I place an order for SMA5J24CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J24CAHM3_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 SMA5J24CAHM3_A/I reliable?
The price and inventory of SMA5J24CAHM3_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 SMA5J24CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMA5J24CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J24CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J24CAHM3_A/I?
SMA5J24CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J24CAHM3_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 SMA5J24CAHM3_A/I?
For technical support, including SMA5J24CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J24CAHM3_A/I requirements.
6.How does Aetrix verify that SMA5J24CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMA5J24CAHM3_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 SMA5J24CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMA5J24CAHM3_A/I?
All SMA5J24CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J24CAHM3_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 SMA5J24CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMA5J24CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J24CAHM3_A/I Tags
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