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Vishay General Semiconductor - Diodes Division SMCJ24AHE3_A/I
- Part No.:
- SMCJ24AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ24AHE3_A/I.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,697
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Product details
Overview
SMCJ24AHE3_A/I 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 standoff voltage (VWM), 26.7–29.5 V breakdown range (VBR at 1 mA), 38.9 V clamping voltage (VC) at 38.6 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 µs waveform), commonly deployed in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMCJ24AHE3_A/I datasheet, SMCJ24AHE3_A/I pinout, SMCJ24AHE3_A/I application, or SMCJ24AHE3_A/I equivalent, key selection criteria include its AEC-Q101 qualification, 1500 W surge capability, low 0.096 %/°C VBR temperature coefficient, and compatibility with automated SMT assembly on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional clamping device: reverse-biased during normal operation, it remains high-impedance until transient voltage exceeds VBR, then rapidly switches to low-impedance conduction to shunt surge energy. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1 ns).
The SMCJ24AHE3_A/I is rated for 150 °C maximum junction temperature, exhibits 75 °C/W junction-to-ambient thermal resistance (RθJA), and supports 200 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), making it suitable for harsh environments where thermal derating above 25 °C must be applied per Figure 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR (min/max) | 26.7 V / 29.5 V at 1 mA - Confirmed breakdown threshold range; ensures reliable triggering across process variation. |
| VC @ IPPM | 38.9 V at 38.6 A - Clamped voltage during 1500 W transient; determines protected circuit's maximum stress level. |
| PPPM | 1500 W (10/1000 µs) - Peak surge power handling; validates immunity to ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 transients. |
| IPPM | 38.6 A - Peak pulse current corresponding to VC; used to size PCB trace width and verify layout survivability. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial enclosures. |
| Temp. Coeff. VBR | 0.096 %/°C - Low drift ensures stable clamping across temperature; critical for precision power rail protection. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Polarity marked by cathode band; anode and cathode terminals are electrically isolated except during clamping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | High-side connection point for unidirectional clamping | Connected to protected line (e.g., +12 V rail); conducts surge current to ground when VIN > VBR. |
| Anode | Reference/return path | Typically tied to system ground or low-impedance return plane; completes clamping current path during transient events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; supports under-hood and powertrain applications. |
| Glass passivated junction | Ensures stable reverse leakage (<1.0 µA at VWM) and long-term parameter stability under humidity and bias stress. |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients; contributes to 38.9 V clamping at 38.6 A (10/1000 µs). |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns; eliminates pre-bake requirement. |
| RoHS-compliant & halogen-free option | HE3 suffix denotes RoHS compliance; HM3 variant adds halogen-free molding compound for stringent environmental programs. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground, clamping surges before they reach downstream regulators and microcontrollers. Use Value: Limits transient voltage to ≤38.9 V, preventing damage to 3.3 V/5 V logic supplies and ensuring ASIL-B functional safety compliance. | Use Scenario: Shielding analog outputs (e.g., 4–20 mA current loops) in factory automation sensors from ESD and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (used in single-ended configuration) across signal and return paths to absorb ±8 kV contact ESD (IEC 61000-4-2). Use Value: Maintains signal integrity with <1.0 µA leakage at 24 V, enabling sub-µA sensor bias current accuracy. |
| Telecom DC Power Feeds | Consumer Device USB Port Protection |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) from lightning-induced surges on 48 V DC lines. IC Role / Device Role / Timing Role: Primary clamping device on input rail, coordinated with upstream fuses and secondary filtering to meet IEC 61000-4-5 Level 4 (4 kV line-earth). Use Value: Withstands 1500 W peak power, allowing compact placement near connectors without thermal runaway risk. | Use Scenario: Adding overvoltage resilience to USB-C VBUS lines in portable chargers exposed to adapter fault conditions. IC Role / Device Role / Timing Role: Standoff-rated TVS on VBUS path, triggered only during overvoltage faults (>24 V), not during normal 5–20 V PD negotiation. Use Value: 24 V VWM avoids false triggering during USB PD voltage transitions while clamping fast spikes to 38.9 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/57T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Not rated for AEC-Q101; limited to commercial-grade consumer/industrial use | Select when cost and board space are prioritized over automotive qualification and 1500 W surge headroom. |
| SMCJ24CAHE3_A/I | Bidirectional version; identical VWM, VBR, VC, and PPPM but symmetric clamping in both polarities | Required for AC-coupled or floating signal lines where polarity reversal may occur | Choose for RS-485, CAN bus, or audio lines needing protection against ± transients without polarity constraints. |
Compared with SMAJ24A-E3/57T, the SMCJ24AHE3_A/I delivers 275 % higher surge power and automotive qualification; versus SMCJ24CAHE3_A/I, it offers lower capacitance and simpler grounding in DC-biased systems but lacks bidirectional symmetry.
Availability
SMCJ24AHE3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor modules, and telecom power supplies requiring stable component supply with AEC-Q101 assurance and 1500 W transient immunity.
Supply support for SMCJ24AHE3_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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The SMCJ series is engineered for high-energy transient suppression in demanding environments, targeting automotive, industrial, and telecom infrastructure where robustness against ISO 7637, IEC 61000-4-5, and ESD events is mandatory.
FAQ
What is the clamping voltage of the SMCJ24AHE3_A/I under a 10/1000 µs surge?
The SMCJ24AHE3_A/I clamps to a maximum of 38.9 V when subjected to its rated 38.6 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured at TA = 25 °C on 8.0 mm × 8.0 mm copper pads and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ24AHE3_A/I maintains this clamping performance across its full operating temperature range with minimal drift due to its 0.096 %/°C VBR coefficient.
Is the SMCJ24AHE3_A/I qualified for automotive applications?
Yes, the SMCJ24AHE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in the SMCJ5.0A–SMCJ188CA datasheet (Document Number 88394, Revision 09-Jan-2024). This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD, validating its suitability for under-hood and powertrain control units. The SMCJ24AHE3_A/I meets automotive reliability requirements without derating for temperature or lifetime in standard mounting configurations.
What does the "_A/I" suffix mean in SMCJ24AHE3_A/I?
The "_A/I" suffix in SMCJ24AHE3_A/I indicates the revision code ("A") and packaging format ("I"). "I" specifies 13-inch diameter plastic tape and reel delivery containing 3500 units, per Vishay's ordering information table. The "HE3" portion confirms RoHS-compliant construction with AEC-Q101 qualification, while "A" denotes the current revision level of the device specification. This full ordering code ensures traceability to Vishay's qualified manufacturing lot and thermal/mechanical data.
How does the SMCJ24AHE3_A/I compare to the SMAJ24A in terms of surge handling?
The SMCJ24AHE3_A/I delivers 1500 W peak pulse power (10/1000 µs), whereas the SMAJ24A is rated for only 400 W - a 275 % increase. This difference stems from the SMCJ24AHE3_A/I's larger SMC (DO-214AB) package, which provides lower thermal resistance (RθJA = 75 °C/W vs. 110 °C/W) and higher surge current capacity (38.6 A vs. 12.3 A). As a result, the SMCJ24AHE3_A/I sustains longer or more energetic transients common in automotive load dump and industrial motor switching, where the SMAJ24A would fail or degrade.
Can the SMCJ24AHE3_A/I be used in bidirectional signal protection?
No - the SMCJ24AHE3_A/I is a unidirectional TVS diode, intended for DC-biased applications like power rail protection where polarity is fixed. For bidirectional signal lines (e.g., RS-485, CAN, audio), the bidirectional variant SMCJ24CAHE3_A/I must be used instead. Using the unidirectional SMCJ24AHE3_A/I on AC or floating signals risks forward conduction during negative half-cycles, potentially damaging the device or distorting signals. Its cathode band marking explicitly designates polarity-dependent operation.
SMCJ24AHE3_A/I 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/I FAQ
1.How can I place an order for SMCJ24AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ24AHE3_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 SMCJ24AHE3_A/I reliable?
The price and inventory of SMCJ24AHE3_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 SMCJ24AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ24AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ24AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ24AHE3_A/I?
SMCJ24AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ24AHE3_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 SMCJ24AHE3_A/I?
For technical support, including SMCJ24AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ24AHE3_A/I requirements.
6.How does Aetrix verify that SMCJ24AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ24AHE3_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 SMCJ24AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ24AHE3_A/I?
All SMCJ24AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ24AHE3_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 SMCJ24AHE3_A/I part is unused and in its original packaging.
Return procedure for SMCJ24AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ24AHE3_A/I Tags
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