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Vishay General Semiconductor - Diodes Division SMA5J24CAHE3_A/I
- Part No.:
- SMA5J24CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J24CAHE3_A/I.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,238
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Product details
Overview
SMA5J24CAHE3_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 standoff voltage (VWM), 38.9 V clamping voltage (VC) at 12.9 A peak pulse current (IPPM), and 500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J24CAHE3_A/I datasheet, SMA5J24CAHE3_A/I pinout, SMA5J24CAHE3_A/I application, or SMA5J24CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, RoHS-compliant matte tin terminals, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamped transient protector with symmetrical breakdown characteristics in both polarities due to its bidirectional construction. Its glass-passivated junction ensures stable leakage performance (<1.0 μA at VWM) and fast response time (<1.0 ps), enabling effective suppression of ESD, lightning-induced surges, and inductive switching transients.
The SMA5J24CAHE3_A/I is rated for junction temperatures from –55 °C to +150 °C and exhibits low incremental surge resistance, delivering consistent clamping behavior across repeated 10/1000 μs pulses. Thermal resistance is 80 °C/W (junction-to-ambient) and 25 °C/W (junction-to-lead), supporting reliable operation under sustained surge stress when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 24 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe operating margin for 24 V nominal systems. |
| VBR (Breakdown Voltage) | 26.7–29.5 V - Measured at 1 mA test current; ensures reliable turn-on above system operating voltage with defined tolerance band. |
| VC (Clamping Voltage) | 38.9 V at IPPM = 12.9 A - Peak voltage seen by protected circuit during 500 W transient; critical for IC-level overvoltage margining. |
| PPPM (Peak Pulse Power) | 500 W - With 10/1000 μs waveform; quantifies single-event surge energy handling capacity without degradation. |
| ID (Reverse Leakage) | ≤1.0 μA at 24 V - Confirms minimal standby power loss and signal integrity impact in high-impedance circuits. |
| TJ max. | +150 °C - Enables use in under-hood automotive and industrial environments with elevated ambient temperatures. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
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 - bidirectional symmetry eliminates cathode/anode orientation concerns during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping occurs regardless of voltage polarity applied across device. |
| Case (body) | Thermal and mechanical interface | Non-electrical; provides mechanical anchoring and thermal conduction path to PCB copper pads (0.2" × 0.2" recommended). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints. |
| AEC-Q101 qualification | Validates robustness for automotive applications including engine control units, ADAS sensors, and body electronics. |
| Glass passivated junction | Ensures long-term stability of breakdown voltage and leakage current under thermal and humidity stress. |
| MSL Level 1 rating | Allows unlimited floor life and reflow up to 260 °C peak, compatible with standard lead-free assembly processes. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving protection effectiveness for sensitive IC inputs. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt surge energy before reaching signal conditioning circuitry. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-2 Level 4 (15 kV air discharge) stress conditions. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring transients and ground bounce. IC Role / Device Role / Timing Role: Primary overvoltage clamp on each isolated input channel, positioned upstream of optocoupler or Schmitt trigger input stage. Use Value: Prevents false triggering and latch-up in industrial control logic by limiting transient voltage to ≤38.9 V during 500 W surges. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceiver pins in base station backhaul equipment from induced lightning surges on long cable runs. IC Role / Device Role / Timing Role: Secondary protection device after gas discharge tube (GDT), providing low-clamp backup for fast-rising transients. Use Value: Achieves <1 ns response time and sub-40 V clamping to preserve transceiver IC reliability without adding propagation delay. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Across-the-line TVS on motor terminals to absorb inductive kickback energy during MOSFET switching transitions. Use Value: Eliminates need for snubber RC networks while sustaining 500 W peak dissipation per pulse without derating below 125 °C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J24CAHM3_A/I | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated by OEM or regional regulations. | Choose SMA5J24CAHM3_A/I when halogen-free bill-of-materials is required; otherwise SMA5J24CAHE3_A/I offers standard RoHS compliance. |
| SMCJ24CAHE3_A/I | Same VWM and VC but in larger SMC (DO-214AB) package; higher thermal mass yields 1500 W PPPM rating. | Used where higher surge energy handling (>500 W) or improved thermal dissipation is needed, e.g., main power rail protection. | Select SMCJ24CAHE3_A/I only if system-level surge testing exceeds 500 W; SMA5J24CAHE3_A/I remains optimal for space-constrained signal line protection. |
Compared with SMA5J24CAHM3_A/I, the SMA5J24CAHE3_A/I differs only in halogen content - no electrical or mechanical trade-offs. Against SMCJ24CAHE3_A/I, it trades surge capacity for 40 % smaller footprint, making it preferable for dense PCB layouts where 500 W protection suffices.
Availability
SMA5J24CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply with AEC-Q101 assurance and RoHS compliance.
Supply support for SMA5J24CAHE3_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, 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, and telecom markets where AEC-Q101 validation and consistent clamping performance are mandatory.
FAQ
What is the clamping voltage of the SMA5J24CAHE3_A/I under maximum rated surge current?
The SMA5J24CAHE3_A/I clamps to 38.9 V when subjected to its peak pulse current of 12.9 A (10/1000 μs waveform). This value is measured and guaranteed per the Vishay datasheet, ensuring predictable overvoltage limiting for downstream ICs. The SMA5J24CAHE3_A/I maintains this clamping performance across its full operating temperature range and after repeated surge events when mounted per recommended thermal pad layout.
Is the SMA5J24CAHE3_A/I suitable for automotive applications?
Yes - the SMA5J24CAHE3_A/I is explicitly AEC-Q101 qualified, with test documentation covering HTOL, temperature cycling, and ESD robustness required for automotive electronics. Its 24 V standoff and bidirectional architecture make it ideal for protecting CAN, LIN, and sensor signal lines in engine control units and ADAS subsystems. The SMA5J24CAHE3_A/I meets automotive-grade reliability standards without requiring additional qualification by the end user.
How does the SMA5J24CAHE3_A/I differ from unidirectional variants like SMA5J24AHE3_A/I?
The SMA5J24CAHE3_A/I is bidirectional, meaning it clamps symmetrically for both positive and negative transients - essential for AC-coupled or floating signal paths. In contrast, SMA5J24AHE3_A/I is unidirectional and conducts only in reverse bias, requiring correct polarity orientation. Both share identical VWM (24 V), VC (38.9 V), and PPPM (500 W), but the SMA5J24CAHE3_A/I eliminates polarity marking and simplifies layout for differential or dual-rail protection schemes.
What is the maximum operating temperature for the SMA5J24CAHE3_A/I?
The SMA5J24CAHE3_A/I has a maximum junction temperature (TJ max.) of +150 °C and an operating junction/storage temperature range of –55 °C to +150 °C. This allows deployment in under-hood automotive environments and industrial enclosures with elevated ambient temperatures. Derating curves in the Vishay datasheet confirm sustained 500 W surge capability up to 125 °C ambient when mounted on minimum recommended copper pads.
Does the SMA5J24CAHE3_A/I require special PCB layout considerations?
Yes - the SMA5J24CAHE3_A/I must be mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 500 W pulse power and thermal performance. Smaller pads increase thermal resistance and reduce surge capability. Trace inductance should also be minimized between the SMA5J24CAHE3_A/I and protected node to preserve fast response; placement within 2 mm of the IC input pin is recommended for optimal ESD protection.
SMA5J24CAHE3_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:
- -
- 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_A/I FAQ
1.How can I place an order for SMA5J24CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J24CAHE3_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 SMA5J24CAHE3_A/I reliable?
The price and inventory of SMA5J24CAHE3_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 SMA5J24CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMA5J24CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J24CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J24CAHE3_A/I?
SMA5J24CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J24CAHE3_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 SMA5J24CAHE3_A/I?
For technical support, including SMA5J24CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J24CAHE3_A/I requirements.
6.How does Aetrix verify that SMA5J24CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMA5J24CAHE3_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 SMA5J24CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMA5J24CAHE3_A/I?
All SMA5J24CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J24CAHE3_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 SMA5J24CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMA5J24CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J24CAHE3_A/I Tags
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