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Vishay General Semiconductor - Diodes Division SMCJ24CHE3/9AT
- Part No.:
- SMCJ24CHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ24CHE3/9AT.pdf
- Description:
- TVS DIODE 24VWM 43VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,855
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Product details
Overview
SMCJ24CHE3/9AT from Vishay General Semiconductor is a surface-mount, AEC-Q101-qualified, bi-directional transient voltage suppressor (TVS) in DO-214AB (SMCJ) package. It features 24 V stand-off voltage (VWM), 38.9 V maximum clamping voltage (VC) at 38.6 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform. It protects automotive sensor signal lines and power rails against ESD and load dump transients.
For engineers reviewing the SMCJ24CHE3/9AT datasheet, SMCJ24CHE3/9AT pinout, SMCJ24CHE3/9AT application, or SMCJ24CHE3/9AT equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, DO-214AB mechanical data, clamping performance under standardized surge conditions, and direct alternatives for automotive-grade circuit protection design.
Technical Context
The SMCJ24CHE3/9AT operates as a bi-directional avalanche diode, symmetrically clamping voltage transients above ±26.7 V (min) and ±29.5 V (max) breakdown (VBR) with 1 mA test current. Its low incremental surge resistance enables stable clamping during 10/1000 µs surges up to 38.6 A, while maintaining ≤1.0 µA reverse leakage at 24 V.
Designed for automotive environments, it meets AEC-Q101 stress requirements and MSL Level 1 per J-STD-020 (260 °C peak reflow). Its glass-passivated junction and matte tin-plated leads ensure reliability under thermal cycling and humidity exposure in engine control units and ADAS sensor modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 26.7 V / 29.5 V - Breakdown occurs within this range at 1 mA, ensuring predictable turn-on margin |
| VC @ IPPM | 38.9 V - Clamped voltage seen by protected circuit during full 1500 W surge event |
| PPPM | 1500 W - Peak transient energy absorption capability with 10/1000 µs waveform |
| ID @ VWM | ≤1.0 µA - Ultra-low leakage preserves signal integrity on high-impedance sensor lines |
| TJ max. | +150 °C - Junction temperature rating enabling operation in under-hood automotive locations |
| Package | DO-214AB (SMCJ) - Standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad footprint |
Pinout & Package
SMCJ24CHE3/9AT uses a 2-terminal DO-214AB (SMCJ) package with no polarity marking for bi-directional operation. Terminals are matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. The device is mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional transient conduction path | Either terminal serves as anode or cathode depending on transient polarity; no marking required |
| Cathode Band (absent) | Polarity indicator | Not present - confirms bi-directional configuration per SMCJ24CHE3/9AT suffix "HE3" and "CA" family designation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated junction | Enhances long-term stability and moisture resistance in harsh under-hood environments |
| MSL Level 1 rating | Enables standard SMT reflow without baking; peak temperature tolerance up to 260 °C |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on downstream ICs during transient events |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance for high-reliability automotive solder joints |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Lines |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine control modules. IC Role / Device Role / Timing Role: Bi-directional TVS clamp absorbing ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2a (load dump) transients. Use Value: Limits voltage excursion to ≤38.9 V during 38.6 A surge, preventing damage to 3.3 V/5 V sensor interface ICs. |
Use Scenario: Guarding differential CAN_H/CAN_L signal pairs in vehicle body control units. IC Role / Device Role / Timing Role: Symmetric transient suppression on both lines to maintain common-mode noise immunity during ESD events. Use Value: Maintains <1.0 µA leakage at 24 V, avoiding DC bias shift that could degrade CAN bus termination and signal integrity. |
| Power Supply Input Protection | ADAS Camera Module Inputs |
|
Use Scenario: Safeguarding 24 V input rails of infotainment head units and telematics gateways. IC Role / Device Role / Timing Role: Primary front-end surge limiter handling load dump transients up to 1500 W. Use Value: Withstands 200 A non-repetitive forward surge (IFSM), providing robustness against battery reversal and jump-start conditions. |
Use Scenario: Shielding MIPI CSI-2 data lines and power inputs of surround-view camera ECUs. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) clamping of ESD events per IEC 61000-4-2 Level 4 (±15 kV air). Use Value: Achieves 38.9 V clamping at 38.6 A with minimal capacitance impact, preserving high-speed video signal fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24AHE3/A | Lower PPPM (400 W), smaller DO-214AC (SMA) package, same VWM (24 V) and VC (38.9 V) | Suitable for space-constrained consumer electronics; insufficient for automotive load dump per ISO 7637-2 | Select when board area is critical and surge energy is limited to ≤400 W |
| 1.5KE24CA | Through-hole TO-218 package, same VWM (24 V) and VC (38.9 V), but higher thermal resistance (RθJA = 10 °C/W vs. 75 °C/W) | Used in legacy industrial power supplies; lacks AEC-Q101 qualification and MSL Level 1 reflow compatibility | Choose only for through-hole prototyping or non-automotive production where RoHS and reflow are not required |
Compared with SMAJ24AHE3/A and 1.5KE24CA, the SMCJ24CHE3/9AT uniquely combines AEC-Q101 qualification, 1500 W surge capacity, DO-214AB surface-mount compatibility, and ≤1.0 µA leakage-making it the only option qualified for volume automotive electronics requiring both high-energy clamping and automated assembly.
Availability
SMCJ24CHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus interfaces, and ADAS camera module designs requiring stable component supply across extended temperature ranges and high-reliability manufacturing.
Supply support for SMCJ24CHE3/9AT 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 automotive, industrial, and computing applications.
The SMCJ series was developed specifically for high-energy transient suppression in automotive power and signal networks, targeting compliance with ISO 7637-2 and AEC-Q101 for under-hood and chassis-mounted electronics.
FAQ
What does the "HE3" suffix indicate in SMCJ24CHE3/9AT?
The "HE3" suffix denotes RoHS-compliant construction with JESD 201 Class 2 whisker resistance, AEC-Q101 qualification, and matte tin-plated leads. This distinguishes SMCJ24CHE3/9AT from commercial-grade "E3" variants and confirms its suitability for automotive production. The SMCJ24CHE3/9AT meets all stress tests defined in AEC-Q101 Rev D, including HTGB, AC-H3TRB, and ESD HBM ≥8 kV.
Is SMCJ24CHE3/9AT unidirectional or bidirectional, and how is polarity identified?
SMCJ24CHE3/9AT is a bi-directional TVS, confirmed by its "CA" family designation and absence of cathode band marking. Its electrical characteristics-including VBR, VC, and ID-are identical in both directions. Polarity identification is unnecessary; either terminal may connect to line or ground. This symmetry is essential for protecting differential buses like CAN or LIN where transients can occur with either polarity.
What is the maximum clamping voltage of SMCJ24CHE3/9AT under standardized surge conditions?
The SMCJ24CHE3/9AT exhibits a maximum clamping voltage (VC) of 38.9 V when subjected to its rated 10/1000 µs peak pulse current of 38.6 A. This value is measured per ANSI/IEEE C62.35 and reflects worst-case clamping performance at TA = 25 °C on recommended 8.0 mm × 8.0 mm copper pads. The clamping ratio (VC/VBR) remains ~1.4, ensuring predictable overvoltage limiting for protected ICs.
Can SMCJ24CHE3/9AT be used in place of SMCJ24A-E3/9AT?
No-SMCJ24CHE3/9AT and SMCJ24A-E3/9AT are not interchangeable. SMCJ24A-E3/9AT is unidirectional (cathode-banded, VBR only specified in one direction), while SMCJ24CHE3/9AT is bi-directional with symmetrical characteristics. Substituting one for the other risks incorrect clamping behavior on AC-coupled or differential lines. Always verify polarity and directionality using the full part number and datasheet revision 11-Dec-12.
What PCB layout guidance applies to SMCJ24CHE3/9AT for optimal thermal and surge performance?
Mount SMCJ24CHE3/9AT on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in Figure 4 of document 88394. Avoid narrow traces between the device and protected node; use short, wide copper pours to minimize inductance and reduce clamping overshoot. Thermal relief is not recommended-solid copper connections maximize heat dissipation and sustain 6.5 W power dissipation at TA = 50 °C.
SMCJ24CHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 43V
- Current - Peak Pulse (10/1000µs):
- 34.9A
- 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)
SMCJ24CHE3/9AT FAQ
1.How can I place an order for SMCJ24CHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ24CHE3/9AT 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 SMCJ24CHE3/9AT reliable?
The price and inventory of SMCJ24CHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ24CHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ24CHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ24CHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ24CHE3/9AT?
SMCJ24CHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ24CHE3/9AT 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 SMCJ24CHE3/9AT?
For technical support, including SMCJ24CHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ24CHE3/9AT requirements.
6.How does Aetrix verify that SMCJ24CHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ24CHE3/9AT 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 SMCJ24CHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ24CHE3/9AT?
All SMCJ24CHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ24CHE3/9AT, 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 SMCJ24CHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ24CHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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