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Vishay General Semiconductor - Diodes Division SMA5J24CAHE3/5A
- Part No.:
- SMA5J24CAHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J24CAHE3/5A.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,196
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Product details
Overview
SMA5J24CAHE3/5A 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 at 12.9 A peak pulse current, and 500 W peak pulse power dissipation 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 SMA5J24CAHE3/5A datasheet, SMA5J24CAHE3/5A pinout, SMA5J24CAHE3/5A application, or SMA5J24CAHE3/5A equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, RoHS-compliant construction with matte tin leads, and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector: when reverse (or forward, in bidirectional mode) voltage exceeds its breakdown threshold (26.7–29.5 V), it avalanches to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable leakage (<1 μA at 24 V) and fast response time (<1 ns).
Designed for unclamped transient suppression per IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive load dump), it sustains 500 W peak pulse power under standardized 10/1000 µs waveform while maintaining low incremental surge resistance and thermal resistance of 25 °C/W (junction-to-lead).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 24 V - maximum continuous reverse voltage before conduction begins; defines operating margin for 24 V nominal systems. |
| VBR (Breakdown Voltage) | 26.7–29.5 V at 1 mA - guaranteed avalanche initiation range; ensures reliable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 38.9 V at IPPM = 12.9 A - peak voltage seen by protected circuit during full-rated surge; limits stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 500 W (10/1000 µs) - energy-handling capacity; supports robust protection in automotive and industrial environments. |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood or high-ambient industrial enclosures. |
| Polarity | Bidirectional - symmetrical clamping in both directions; eliminates polarity concerns in AC-coupled or floating signal lines. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (unmarked) | Surge current path terminals | Identical bidirectional terminals - either lead conducts during positive or negative transients; no cathode band marking required. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress. |
| MSL Level 1 (260 °C peak) | Enables standard reflow soldering without moisture sensitivity concerns or baking requirements. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving clamping precision for sensitive analog inputs. |
| RoHS-compliant + halogen-free option available | Meets global environmental compliance mandates (e.g., EU RoHS, JEDEC J-STD-201 Class 2 whisker resistance). |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from ISO 7637-2 load dump and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional shunt TVS placed directly at connector entry point to clamp transients before reaching signal conditioning circuitry. Use Value: With 38.9 V clamping at 12.9 A and AEC-Q101 qualification, SMA5J24CAHE3/5A prevents latch-up or damage to 24 V automotive microcontrollers and transceivers. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive switching noise from solenoids and contactors. IC Role / Device Role / Timing Role: Parallel-connected TVS on 24 V DC input rails to absorb repetitive 500 W surges without degradation. Use Value: 500 W peak pulse rating and 150 °C max junction temperature allow sustained operation in hot control cabinets with minimal derating. |
| Telecom Line Driver Protection | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485/RS-232 interface ICs in base stations and network equipment from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional clamping element across differential pairs or supply rails to suppress common-mode and differential-mode transients. Use Value: Symmetrical 24 V standoff and sub-1 ns response ensure signal integrity preservation during fast EFT bursts per IEC 61000-4-4. | Use Scenario: Protecting gate drivers and MCU GPIOs in washing machine or HVAC motor inverters from back-EMF spikes during brushless DC motor commutation. IC Role / Device Role / Timing Role: Localized TVS at motor driver output stage to clamp inductive kickback before it couples into logic circuitry. Use Value: SMA5J24CAHE3/5A's 25 °C/W junction-to-lead thermal resistance enables efficient heat transfer to PCB copper, supporting high-surge-duty cycles. |
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-M3/5A | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated (e.g., certain EU industrial standards). | Choose SMA5J24CA-M3/5A when halogen-free construction is required; otherwise SMA5J24CAHE3/5A offers same performance with standard RoHS compliance. |
| SMCJ24CAHE3/5A | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; higher thermal mass and RθJA = 35 °C/W vs. 80 °C/W. | Better suited for higher average power dissipation or less aggressive board layout constraints; not drop-in due to footprint mismatch. | Select SMCJ24CAHE3/5A only if thermal budget exceeds SMA5J24CAHE3/5A's 80 °C/W RθJA or if mechanical robustness demands larger case size. |
Compared with SMA5J24CA-M3/5A, SMA5J24CAHE3/5A provides identical surge performance with standard RoHS compliance; versus SMCJ24CAHE3/5A, it trades thermal margin for space-constrained layouts - critical for compact automotive ECUs and IoT edge nodes.
Availability
SMA5J24CAHE3/5A 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 AEC-Q101 assurance and RoHS compliance.
Supply support for SMA5J24CAHE3/5A 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 space-constrained, high-reliability applications - particularly targeting automotive, industrial automation, and communications infrastructure where bidirectional clamping and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SMA5J24CAHE3/5A at its rated peak pulse current?
The SMA5J24CAHE3/5A has a maximum clamping voltage (VC) of 38.9 V when subjected to its rated peak pulse current (IPPM) of 12.9 A under the standard 10/1000 µs waveform. This value is measured at 25 °C ambient and reflects the actual voltage imposed on protected circuitry during worst-case surge conditions - critical for ensuring downstream ICs remain within safe operating limits.
Is SMA5J24CAHE3/5A suitable for automotive applications?
Yes, SMA5J24CAHE3/5A is AEC-Q101 qualified and explicitly designed for automotive use. Its bidirectional architecture, 24 V standoff, and ability to withstand ISO 7637-2 load dump pulses make it appropriate for protecting ECUs, body control modules, and sensor interfaces. The HE3 suffix confirms RoHS compliance and automotive qualification per Vishay's ordering nomenclature.
Does SMA5J24CAHE3/5A have polarity markings on the package?
No, SMA5J24CAHE3/5A does not feature polarity markings such as a cathode band because it is a bidirectional TVS diode. Both terminals are functionally identical - the device clamps symmetrically for positive and negative transients. This eliminates orientation errors during automated placement and simplifies PCB layout for AC-coupled or floating signal paths.
What is the thermal resistance of SMA5J24CAHE3/5A, and how does it affect PCB layout?
SMA5J24CAHE3/5A has a typical junction-to-lead thermal resistance (RθJL) of 25 °C/W and junction-to-ambient (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" copper pads. To maintain reliability under repeated surges, designers must provide adequate copper area and thermal vias - especially since its 150 °C max junction temperature requires careful thermal management in enclosed or high-ambient environments.
How does SMA5J24CAHE3/5A differ from unidirectional variants like SMA5J24AHE3/5A?
SMA5J24CAHE3/5A is bidirectional with symmetrical clamping in both polarities, whereas SMA5J24AHE3/5A is unidirectional and conducts only in reverse bias (with cathode band marking). The "CA" suffix denotes bidirectional functionality - essential for AC signal lines, differential buses, or any application where voltage polarity reversal occurs. Electrical parameters (VWM, VBR, VC) are specified identically in both directions for the CA version.
SMA5J24CAHE3/5A 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)
SMA5J24CAHE3/5A FAQ
1.How can I place an order for SMA5J24CAHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J24CAHE3/5A 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 SMA5J24CAHE3/5A reliable?
The price and inventory of SMA5J24CAHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J24CAHE3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J24CAHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J24CAHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J24CAHE3/5A?
SMA5J24CAHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J24CAHE3/5A 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 SMA5J24CAHE3/5A?
For technical support, including SMA5J24CAHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J24CAHE3/5A requirements.
6.How does Aetrix verify that SMA5J24CAHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J24CAHE3/5A 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 SMA5J24CAHE3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J24CAHE3/5A?
All SMA5J24CAHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J24CAHE3/5A, 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 SMA5J24CAHE3/5A part is unused and in its original packaging.
Return procedure for SMA5J24CAHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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