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Vishay General Semiconductor - Diodes Division SMA5J24CAHE3/61
- Part No.:
- SMA5J24CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J24CAHE3/61.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,126
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Product details
Overview
SMA5J24CAHE3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on power and signal lines. It features a 24 V stand-off voltage (VWM), 38.9 V maximum clamping voltage at 12.9 A peak pulse current (IPPM), and 500 W peak pulse power rating with 10/1000 μs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMA5J24CAHE3/61 datasheet, SMA5J24CAHE3/61 pinout, SMA5J24CAHE3/61 application, or SMA5J24CAHE3/61 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, RoHS-compliant HE3 suffix, thermal resistance (RθJA = 80 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection against positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance, while meeting MSL Level 1 per J-STD-020 with 260 °C reflow peak tolerance.
The device is rated for -55 °C to +150 °C operating junction temperature and delivers consistent clamping performance up to its 500 W peak pulse power limit under standardized 10/1000 μs surge conditions. Its 26.7–29.5 V breakdown voltage range (VBR) and ≤1.0 μA reverse leakage at 24 V support reliable standby-state isolation in low-power sensor and communication circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V rail protection. |
| VBR (min/max) | 26.7 V / 29.5 V - Breakdown voltage range at 1 mA test current; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 38.9 V at 12.9 A - Clamping voltage under full-rated 500 W surge; determines maximum stress imposed on protected downstream components. |
| PPPM | 500 W - Peak pulse power handling with 10/1000 μs waveform; supports robust immunity to 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. |
| RθJA | 80 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs thermal derating requirements in PCB layout. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional - no polarity marking; molded case meets UL 94 V-0; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping allows connection across any two points needing surge suppression without orientation concern. |
| Case (body) | Thermal and mechanical interface | Plastic body provides electrical isolation; thermal path relies on soldered pad area (5.0 mm × 5.0 mm recommended per terminal) for RθJA = 80 °C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN, RS-485) without external polarity management. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control units and ADAS sensor interfaces where reliability under thermal cycling and vibration is critical. |
| Glass-passivated junction | Ensures long-term stability of VBR and low leakage (<1.0 μA at VWM), reducing risk of false triggering or standby power loss. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow processes without preconditioning, simplifying manufacturing integration in high-volume SMT lines. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs in body control modules against load dump and inductive switching transients. IC Role / Device Role / Timing Role: TVS diode providing fast-response clamping to limit voltage excursions below 39 V during ISO 7637-2 Pulse 5a events. Use Value: Prevents latch-up or permanent damage to microcontrollers and power management ICs by maintaining rail integrity within safe operating limits. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) in pressure or temperature transmitters from ESD and field wiring surges. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal and return paths to absorb ±15 kV contact ESD (IEC 61000-4-2) and induced transients. Use Value: Maintains signal fidelity and prevents erroneous readings or system resets caused by transient-induced noise or latch-up in precision ADC front-ends. |
| Telecom Line Card Surge Suppression | Consumer Device USB Port Protection |
Use Scenario: Safeguarding Ethernet PHY power and bias rails in PoE-powered network switches exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge limiter on 48 V DC input, coordinating with secondary TVS arrays to meet GR-1089-CORE Level 3 requirements. Use Value: Absorbs up to 500 W of transient energy without degradation, preserving uptime and avoiding costly field failures in carrier-grade infrastructure. | Use Scenario: Adding robustness to USB Type-C VBUS lines in portable audio devices subjected to accidental hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Secondary-level TVS placed after primary fuse and upstream of USB PD controller to handle residual surges bypassing front-end filtering. Use Value: Limits VBUS overshoot to <39 V during 8 kV air discharge, preventing damage to USB controller ICs and ensuring compliance with USB-IF ESD test plans. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J24CA-M3/61 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification; same HE3 packaging but HM3 suffix denotes halogen-free molding compound. | No functional difference in circuit operation; selected when halogen-free material compliance is mandated by OEM environmental policies. | Choose SMA5J24CA-M3/61 only if halogen-free certification is required; otherwise SMA5J24CAHE3/61 remains optimal for general AEC-Q101 automotive use. |
| SMC5J24CAHE3/61 | Same electrical characteristics but in larger SMC (DO-214AB) package; higher thermal mass yields lower RθJA (50 °C/W vs. 80 °C/W) and improved surge endurance under repeated pulses. | Preferred in high-reliability industrial applications with frequent surge exposure or limited PCB copper area for heat dissipation. | Select SMC5J24CAHE3/61 when board layout allows larger footprint and thermal performance outweighs size constraints; SMA5J24CAHE3/61 suits space-constrained automotive modules. |
Compared with SMA5J24CA-M3/61, the SMA5J24CAHE3/61 offers identical surge ratings and AEC-Q101 qualification but uses standard RoHS-compliant (non-halogen-free) molding compound; versus SMC5J24CAHE3/61, it trades thermal robustness and surge repetition capability for compact SMA footprint - making it ideal for tight-layout automotive ECUs where volume production and reflow compatibility are prioritized.
Availability
SMA5J24CAHE3/61 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor transmitters, and telecom line card designs requiring stable component supply with AEC-Q101 qualification and RoHS compliance.
Supply support for SMA5J24CAHE3/61 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMA5J series is part of Vishay's TRANSZORB® TVS platform, engineered for high-power-density transient suppression in automotive, industrial, and communications systems where fast response, low clamping, and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of the SMA5J24CAHE3/61 under maximum rated surge current?
The SMA5J24CAHE3/61 clamps to a maximum of 38.9 V when subjected to its rated peak pulse current of 12.9 A using the standard 10/1000 μs waveform. This value is measured at the device terminals under specified test conditions (TA = 25 °C, mounted on 5.0 mm × 5.0 mm copper pads) and defines the upper voltage limit imposed on protected circuitry during a full-power transient event. The SMA5J24CAHE3/61 maintains this clamping performance consistently across its qualified operating temperature range.
Is the SMA5J24CAHE3/61 suitable for automotive applications?
Yes, the SMA5J24CAHE3/61 is AEC-Q101 qualified and explicitly designated for automotive use via its HE3 suffix, confirming compliance with stress testing for temperature cycling, humidity, mechanical shock, and surge robustness. It is deployed in engine control units, body electronics, and ADAS sensor modules where protection against load dump, jump-start, and inductive switching transients is required. The SMA5J24CAHE3/61 meets these demands with its 24 V stand-off, 38.9 V clamping, and -55 °C to +150 °C operating range.
Does the SMA5J24CAHE3/61 have polarity markings on the package?
No, the SMA5J24CAHE3/61 does not feature polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., SMA5J24A), the CA-suffixed version functions identically in both directions - meaning either terminal can serve as anode or cathode depending on transient polarity. This eliminates orientation concerns during automated placement and simplifies design for AC-coupled or floating signal paths such as CAN bus or RS-485 differential pairs.
What is the thermal resistance of the SMA5J24CAHE3/61, and how does it affect PCB layout?
The SMA5J24CAHE3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimal copper area and guides minimum pad sizing: reducing pad size increases RθJA and risks thermal runaway under repeated surges. For reliable operation in high-temperature environments, designers should maintain at least the recommended pad dimensions and consider adding thermal vias beneath pads to lower effective RθJA. The SMA5J24CAHE3/61's thermal performance directly impacts its ability to sustain multiple surge events without degradation.
How does the SMA5J24CAHE3/61 differ from the unidirectional SMA5J24AHE3/61?
The SMA5J24CAHE3/61 is bidirectional with symmetrical clamping in both polarities and no cathode band marking, whereas the SMA5J24AHE3/61 is unidirectional, features a cathode band, and conducts only during reverse-biased transients. Electrically, the SMA5J24CAHE3/61 has identical VWM (24 V), VBR (26.7–29.5 V), and VC (38.9 V) ratings but supports protection of AC signals or floating nodes where polarity reversal occurs. The SMA5J24CAHE3/61 also exhibits ≤1.0 μA leakage at VWM, matching the unidirectional version's standby performance - making it the preferred choice for bidirectional interface protection.
SMA5J24CAHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J24CAHE3/61 FAQ
1.How can I place an order for SMA5J24CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J24CAHE3/61 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 SMA5J24CAHE3/61 reliable?
The price and inventory of SMA5J24CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J24CAHE3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J24CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J24CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J24CAHE3/61?
SMA5J24CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J24CAHE3/61 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 SMA5J24CAHE3/61?
For technical support, including SMA5J24CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J24CAHE3/61 requirements.
6.How does Aetrix verify that SMA5J24CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J24CAHE3/61 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 SMA5J24CAHE3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J24CAHE3/61?
All SMA5J24CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J24CAHE3/61, 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 SMA5J24CAHE3/61 part is unused and in its original packaging.
Return procedure for SMA5J24CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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