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Vishay General Semiconductor - Diodes Division SMCJ24AHE3_A/H
- Part No.:
- SMCJ24AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ24AHE3_A/H.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,758
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Product details
Overview
SMCJ24AHE3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, 38.6 A peak pulse current (IPPM), 38.9 V clamping voltage (VC) under 10/1000 µs surge, and 1500 W peak pulse power rating.
For engineers reviewing the SMCJ24AHE3_A/H datasheet, SMCJ24AHE3_A/H pinout, SMCJ24AHE3_A/H application, or SMCJ24AHE3_A/H equivalent, key selection criteria include clamping performance under 10/1000 µs transients, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), unidirectional polarity marking, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ24AHE3_A/H operates as a silicon avalanche diode with glass-passivated junction, delivering fast response (<1 ns) to ESD and lightning-induced transients. Its low incremental surge resistance ensures stable clamping during high-current events, while its MSL Level 1 rating supports lead-free reflow up to 260 °C peak.
Designed for unidirectional protection, it exhibits cathode-band polarity marking and forward voltage of 3.5 V at 100 A. The device is rated for -55 °C to +150 °C operating junction temperature and meets UL 497B recognition (QVGQ2) for protector classification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - maximum continuous reverse working voltage before clamping begins |
| VBR min/max | 26.7 V / 29.5 V at 1 mA - guaranteed avalanche initiation range under specified test current |
| VC @ IPPM | 38.9 V at 38.6 A - clamped voltage during 10/1000 µs surge, defining protected circuit's max stress level |
| PPPM | 1500 W - peak transient power handling capability per single 10/1000 µs pulse |
| ID @ VWM | 1.0 µA - reverse leakage at stand-off voltage, critical for low-power sensor rail integrity |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, guiding heatsinking requirements on standard PCB pads |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side for unidirectional protection | Connected to protected line; conducts only during reverse-biased transient clamp |
| Cathode | Ground/reference side | Marked with band; ties to system ground or lower-potential rail to enable avalanche conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives |
| MSL Level 1 | Enables single-reflow assembly without baking, reducing manufacturing complexity and cost |
| UL 497B recognized (QVGQ2) | Meets safety standards for telecom and industrial signal-line protectors without additional certification effort |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage exposure to downstream ICs compared to higher-ratio TVS devices |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V CAN bus power supply and microcontroller I/O against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VCC and GND to clamp transients before they reach PMIC or MCU input pins. Use Value: Withstands 1500 W surges and clamps to 38.9 V, keeping protected 24 V systems within safe operating margin of 36 V-rated components. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA transmitter) from field-wiring induced surges in factory automation. IC Role / Device Role / Timing Role: Standoff-connected TVS on signal path to absorb fast transients while maintaining <1 µA leakage at 24 V nominal. Use Value: 1.0 µA ID at VWM preserves accuracy of precision current loops; SMC package fits dense industrial I/O module layouts. |
| Telecom DC Power Input Protection | OBD-II Diagnostic Port Protection |
Use Scenario: Shielding 24 V PoE-powered network edge devices from lightning-induced surges on DC input lines. IC Role / Device Role / Timing Role: Primary clamping device on main DC input rail, coordinated with upstream fuse and downstream filter capacitors. Use Value: 38.9 V clamping ensures downstream DC/DC converters (rated 40 V input) remain undamaged during 10/1000 µs threats. | Use Scenario: Hardening vehicle OBD-II connector pins against accidental battery reverse connection and jump-start spikes. IC Role / Device Role / Timing Role: Unidirectional TVS on VBAT line to clamp positive transients while blocking reverse conduction. Use Value: AEC-Q101 qualification and cathode-band polarity ensure compliance with automotive OEM interface specifications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24AHE3_A/H | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM/VBR/VC specs | Reduced surge capacity; suitable only for lighter-duty 24 V circuits with lower threat levels | Select when board space is constrained and peak surge energy is ≤600 W |
| SMCJ24AHM3_A/H | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification | No functional difference; required only where halogen-free materials are mandated by end-equipment standards | Select for compliance-driven programs requiring halogen-free bill-of-materials |
Compared with SMCJ24AHE3_A/H, SMBJ24AHE3_A/H trades surge robustness for footprint reduction, while SMCJ24AHM3_A/H maintains full equivalence except for halogen-free construction-making the latter a drop-in material-compliance upgrade rather than an electrical alternative.
Availability
SMCJ24AHE3_A/H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC input safeguarding requiring stable component supply across production lifecycles.
Supply support for SMCJ24AHE3_A/H 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 validation.
The SMCJ series targets high-energy transient suppression in harsh environments, with design focus on automotive, industrial, and telecom infrastructure where AEC-Q101 qualification and UL recognition are mandatory.
FAQ
What is the clamping voltage of the SMCJ24AHE3_A/H under a 10/1000 µs surge?
The SMCJ24AHE3_A/H has a maximum clamping voltage (VC) of 38.9 V when subjected to its rated peak pulse current of 38.6 A using the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ24AHE3_A/H achieves this clamping performance while maintaining a low VC/VBR ratio of approximately 1.39, supporting robust protection of 36 V-tolerant downstream components.
Is the SMCJ24AHE3_A/H qualified for automotive applications?
Yes, the SMCJ24AHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in the SMCJ5.0A–SMCJ188CA datasheet (Rev. 09-Jan-2024). This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD, making the SMCJ24AHE3_A/H suitable for under-hood and chassis-mounted automotive subsystems such as body control modules and power distribution units.
What does the "HE3" suffix indicate in SMCJ24AHE3_A/H?
The "HE3" suffix in SMCJ24AHE3_A/H denotes a RoHS-compliant, AEC-Q101 qualified version with matte tin-plated leads. Per Vishay's ordering information table, "HE3" distinguishes this variant from commercial-grade "E3" parts and halogen-free "HM3" versions. The "_A/H" further specifies packaging: 7-inch tape-and-reel (H) with revision A. This coding ensures traceability to both compliance status and physical delivery format for the SMCJ24AHE3_A/H.
How does the SMCJ24AHE3_A/H compare to bidirectional TVS diodes like SMCJ24CA?
The SMCJ24AHE3_A/H is unidirectional and intended for DC line protection where polarity is fixed, whereas SMCJ24CA is bidirectional and suited for AC or floating-signal applications. Electrically, both share identical VWM (24 V), VBR (26.7–29.5 V), and VC (38.9 V), but the SMCJ24AHE3_A/H includes a cathode band for polarity identification and supports forward conduction (VF = 3.5 V at 100 A), unlike the symmetric bidirectional SMCJ24CA. System designers must select based on signal polarity requirements-not interchangeably.
What is the thermal resistance and maximum junction temperature of the SMCJ24AHE3_A/H?
The SMCJ24AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal, and a maximum operating junction temperature (TJ max) of +150 °C. These values enable reliable operation in high-temperature environments such as automotive engine compartments or industrial enclosures. Derating curves in the datasheet confirm usable power dissipation down to ~4.5 W at 100 °C ambient, ensuring thermal safety margins for the SMCJ24AHE3_A/H in sustained surge scenarios.
SMCJ24AHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 38.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCJ)
SMCJ24AHE3_A/H FAQ
1.How can I place an order for SMCJ24AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ24AHE3_A/H 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 SMCJ24AHE3_A/H reliable?
The price and inventory of SMCJ24AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ24AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ24AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ24AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ24AHE3_A/H?
SMCJ24AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ24AHE3_A/H 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 SMCJ24AHE3_A/H?
For technical support, including SMCJ24AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ24AHE3_A/H requirements.
6.How does Aetrix verify that SMCJ24AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ24AHE3_A/H 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 SMCJ24AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ24AHE3_A/H?
All SMCJ24AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ24AHE3_A/H, 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 SMCJ24AHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ24AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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