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Vishay General Semiconductor - Diodes Division SMA5J24CAHM3/I
- Part No.:
- SMA5J24CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J24CAHM3/I.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,421
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Product details
Overview
SMA5J24CAHM3/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 standoff voltage (VWM), 38.9 V clamping voltage (VC) at 12.9 A peak pulse current (IPPM), 500 W peak pulse power (10/1000 µs), and operates from −55 °C to +150 °C - used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J24CAHM3/I datasheet, SMA5J24CAHM3/I pinout, SMA5J24CAHM3/I application, or SMA5J24CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode employs a glass-passivated silicon junction optimized for fast response (<1 ps) to ESD and lightning-induced transients. Its bidirectional architecture ensures symmetrical clamping in both polarities without polarity marking, and it meets J-STD-020 MSL Level 1 with 260 °C reflow peak tolerance.
The device 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 in compact, thermally constrained PCB designs.
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 voltage range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 38.9 V - clamped voltage during 12.9 A 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 500 W - peak pulse power handling capacity, supporting IEC 61000-4-5 Level 4 surges |
| IPPM | 12.9 A - maximum non-repetitive surge current at rated waveform, validated on 5.0 mm × 5.0 mm pads |
| TJ range | −55 °C to +150 °C - extended junction temperature range enabling under-hood automotive use |
| Package | SMA (DO-214AC) - surface-mount package with 2.29 mm lead spacing, compatible with standard SMT pick-and-place |
Pinout & Package
SMA (DO-214AC) package: molded epoxy case meeting UL 94 V-0, matte tin-plated leads solderable per J-STD-002, no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Bidirectional terminals - either end serves as anode or cathode depending on transient polarity; no band marking required |
| Case (exposed metal slug) | Thermal conduction path | Integral heat-sinking surface - requires direct copper pad contact for thermal derating compliance |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-201 Class 2 whisker resistance and EU RoHS Directive 2011/65/EU |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V logic |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60 % RH, supports standard reflow without baking preconditioning |
| Glass-passivated junction | Enhances long-term stability and moisture resistance versus polymer-passivated alternatives |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed at connector interface to shunt surge energy before reaching signal conditioning circuitry. Use Value: Clamps 24 V system transients to ≤38.9 V within nanoseconds, preserving integrity of 5 V tolerant automotive microcontrollers. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive switching noise from solenoids and relays. IC Role / Device Role / Timing Role: Standoff protector across 24 V DC input lines, absorbing repetitive 500 W surges without degradation. Use Value: Maintains <1 µA leakage at 24 V, ensuring clean logic-level detection while surviving >1000 surges per IEC 61000-4-5. |
| Telecom Power Line Protection | Consumer USB Port ESD Suppression |
Use Scenario: Secondary protection on 48 V PoE-powered Ethernet equipment front-end against lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Parallel-connected TVS on DC input rail, coordinating with upstream GDTs to limit let-through energy. Use Value: Withstands 12.9 A peak current at 38.9 V clamp, reducing risk of MOSFET gate oxide failure in hot-swap controllers. | Use Scenario: Board-level ESD safeguard for USB 2.0 data lines and VBUS in smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor placed adjacent to connector to minimize signal distortion. Use Value: Delivers sub-100 pF junction capacitance at 0 V bias, preserving signal integrity up to 480 Mbps without equalization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J24CAHE3/I | Same electrical specs; RoHS-compliant but not halogen-free; AEC-Q101 qualified | Acceptable for automotive use where halogen content is unrestricted | Select when cost sensitivity outweighs halogen-free requirement and AEC-Q101 is mandatory |
| SMA5J24A-M3/61 | Unidirectional version; identical VWM, VC, PPPM; cathode band marking present | Requires polarity-aware layout; unsuitable for AC-coupled or floating signal lines | Choose only for DC-biased rails where polarity is fixed and space allows orientation control |
Compared with SMA5J24CAHE3/I and SMA5J24A-M3/61, the SMA5J24CAHM3/I uniquely combines bidirectional operation, halogen-free construction, and AEC-Q101 qualification - making it optimal for next-generation automotive ECUs and industrial fieldbus nodes requiring zero-halogen compliance and polarity-agnostic protection.
Availability
SMA5J24CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom power supplies, and consumer USB port protection requiring stable component supply and full traceability.
Supply support for SMA5J24CAHM3/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 TVS devices with emphasis on reliability, power density, and automotive qualification.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained, high-reliability environments - targeting automotive, industrial, and telecom applications demanding robust surge immunity and long-term stability.
FAQ
What is the clamping voltage of the SMA5J24CAHM3/I under a 10/1000 µs surge?
The SMA5J24CAHM3/I clamps to a maximum of 38.9 V when subjected to its rated 12.9 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured with the device mounted on 5.0 mm × 5.0 mm copper pads per the Vishay datasheet test condition - critical for achieving specified performance in real PCB layouts.
Is the SMA5J24CAHM3/I suitable for automotive applications?
Yes, the SMA5J24CAHM3/I is AEC-Q101 qualified and specifically designated for automotive use via the "HM3" suffix, indicating halogen-free, RoHS-compliant, and automotive-grade reliability. It is commonly deployed in engine control units, body electronics, and ADAS sensor interfaces where sustained operation at 150 °C junction temperature is required.
Does the SMA5J24CAHM3/I have polarity markings on the package?
No, the SMA5J24CAHM3/I is a bidirectional TVS diode and carries no polarity marking such as a cathode band. Its symmetrical construction allows either terminal to serve as anode or cathode depending on transient polarity - simplifying layout and eliminating orientation errors during automated assembly.
What is the maximum steady-state reverse leakage current of the SMA5J24CAHM3/I at VWM?
At its 24 V standoff voltage (VWM) and ambient temperature of 25 °C, the SMA5J24CAHM3/I exhibits a maximum reverse leakage current (ID) of 1.0 µA. This low leakage ensures minimal power loss and avoids false triggering in high-impedance sensing circuits powered from the same rail.
How does the SMA5J24CAHM3/I differ from the SMA5J24A-M3/61 variant?
The SMA5J24CAHM3/I is bidirectional with no polarity marking and halogen-free construction, whereas the SMA5J24A-M3/61 is unidirectional, features a cathode band, and is halogen-free but not AEC-Q101 qualified. Their clamping and standoff voltages match, but the "CA" suffix and "HM3" coding make SMA5J24CAHM3/I suitable for AC-coupled or floating signal paths in automotive systems.
SMA5J24CAHM3/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):
- 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/I FAQ
1.How can I place an order for SMA5J24CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J24CAHM3/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/I reliable?
The price and inventory of SMA5J24CAHM3/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/I is usually 5 days.
3.What payment methods are accepted for SMA5J24CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J24CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J24CAHM3/I?
SMA5J24CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J24CAHM3/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/I?
For technical support, including SMA5J24CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J24CAHM3/I requirements.
6.How does Aetrix verify that SMA5J24CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMA5J24CAHM3/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/I meets industry standards.
7.What is the process for return or replacement of SMA5J24CAHM3/I?
All SMA5J24CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J24CAHM3/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/I part is unused and in its original packaging.
Return procedure for SMA5J24CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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