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Vishay General Semiconductor - Diodes Division SMCJ24CAHE3H/H
- Part No.:
- SMCJ24CAHE3H/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ24CAHE3H/H.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,929
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Product details
Overview
SMCJ24CAHE3H/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 24 V standoff voltage (VWM), 38.9 V clamping voltage (VC) at 38.6 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed on automotive sensor signal lines, industrial I/O ports, and telecom interface circuits.
For engineers reviewing the SMCJ24CAHE3H/H datasheet, SMCJ24CAHE3H/H pinout, SMCJ24CAHE3H/H application, or SMCJ24CAHE3H/H equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, low incremental surge resistance, thermal derating behavior above 25 °C, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (<1 µA leakage at 24 V), but triggers into low-impedance conduction when transients exceed its 26.7–29.5 V breakdown range (VBR at 1 mA). Its glass-passivated junction ensures stable avalanche characteristics and fast response time (<1 ns).
The SMCJ24CAHE3H/H is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), enabling reliable operation in automotive under-hood environments when mounted per recommended pad layout.
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 onset range defining turn-on threshold |
| VC @ IPPM | 38.9 V at 38.6 A - clamped voltage during 1500 W transient, limiting stress on downstream ICs |
| PPPM | 1500 W - peak pulse power handling capability with 10/1000 µs waveform |
| TJ max. | +150 °C - maximum junction temperature supporting AEC-Q101 automotive qualification |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, used to calculate safe power derating |
| Package | SMC (DO-214AB) - surface-mount package with 8.0 mm × 8.0 mm thermal pad footprint |
Pinout & Package
SMCJ24CAHE3H/H uses the standard SMC (DO-214AB) package: two-terminal, bidirectional device with no polarity marking (unlike unidirectional variants which feature a cathode band). Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides symmetrical conduction path during positive or negative transients - no fixed polarity |
| Cathode | Transient return path (bidirectional) | Electrically identical to Anode in CA-series; terminals interchangeable in circuit layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Low incremental surge resistance | Enables tighter clamping (38.9 V at 38.6 A), reducing voltage overshoot on protected lines |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress |
| Bidirectional symmetry | Identical electrical characteristics in both directions - simplifies PCB layout and eliminates polarity checks |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN 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: Shunt-type transient suppressor placed directly at connector entry point before signal conditioning circuitry. Use Value: Clamps 1500 W surges to ≤38.9 V while maintaining <1 µA leakage at 24 V system rail - preserving signal integrity and preventing latch-up in downstream ASICs. | 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: Primary overvoltage clamp on 24 V DC field wiring terminals, coordinated with upstream fusing. Use Value: Withstands repetitive 10/1000 µs transients up to 38.6 A without degradation, meeting IEC 61000-4-5 Level 3 immunity requirements. |
| Telecom Interface Protection | Consumer Power Adapter Output Protection |
Use Scenario: Shielding Ethernet PHY interfaces and RS-485 transceivers in base station equipment from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Secondary-level TVS placed after gas discharge tube (GDT) front-end, providing fast-response clamping. Use Value: Sub-1 ns response time captures residual energy missed by slower primary protectors, limiting voltage excursion to 38.9 V during combined threat waveforms. | Use Scenario: Preventing damage to USB-C PD controller ICs and load switches during output short-circuit recovery transients in multi-port AC adapters. IC Role / Device Role / Timing Role: Output-side clamp on 20 V PPS rails, absorbing inductive kickback from synchronous rectifier MOSFETs. Use Value: 24 V VWM aligns with USB PD 3.1 extended power range; 1500 W rating handles worst-case 100 µs energy bursts without failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC24CA | Lower PPPM (1000 W), same VWM/VC, smaller SMA package | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 | Select when board space is constrained and surge energy does not exceed 1000 W |
| SMCJ24AHE3/A | Unidirectional variant; includes cathode band marking; identical VWM/VC/PPPM | Requires polarity-aware layout; used where DC bias prevents reverse conduction | Choose only when circuit topology enforces unidirectional voltage stress |
Compared with SAC24CA and SMCJ24AHE3/A, the SMCJ24CAHE3H/H provides full bidirectional 1500 W surge handling in an AEC-Q101-qualified SMC package - making it the preferred choice for automotive and industrial applications demanding symmetric protection without polarity constraints or derated power capability.
Availability
SMCJ24CAHE3H/H is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC development, and telecom infrastructure projects requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ24CAHE3H/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, precision, and automotive-grade qualification.
The SMCJ series was developed specifically for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against ISO 7637-2 pulses and IEC 61000-4-5 surges is mandatory.
FAQ
What does the "CA" suffix indicate in SMCJ24CAHE3H/H?
The "CA" suffix in SMCJ24CAHE3H/H denotes a bidirectional configuration - meaning the device provides symmetrical transient voltage suppression for both positive and negative polarity transients. Unlike unidirectional "A" variants, SMCJ24CAHE3H/H has no cathode marking and identical electrical characteristics in either direction, simplifying layout for AC-coupled or floating signal lines.
Is SMCJ24CAHE3H/H qualified for automotive use?
Yes, SMCJ24CAHE3H/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure ("HE3" suffix) and documentation. This qualification validates its performance across -55 °C to +150 °C junction temperature, resistance to mechanical shock/vibration, and reliability under repetitive surge stress - making SMCJ24CAHE3H/H suitable for engine control, body electronics, and ADAS sensor protection.
What is the maximum clamping voltage of SMCJ24CAHE3H/H under surge conditions?
The maximum clamping voltage (VC) of SMCJ24CAHE3H/H is 38.9 V at 38.6 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions and represents the upper limit of voltage seen by protected circuitry during a full-rated 1500 W transient event - critical for ensuring downstream ICs remain within absolute maximum ratings.
How does the SMC (DO-214AB) package of SMCJ24CAHE3H/H affect thermal performance?
The SMC (DO-214AB) package of SMCJ24CAHE3H/H delivers RθJA = 75 °C/W (typ.) when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This thermal performance enables SMCJ24CAHE3H/H to sustain repeated 1500 W surges without exceeding +150 °C junction temperature - provided PCB layout follows Vishay's recommended pad dimensions and avoids excessive trace impedance.
Can SMCJ24CAHE3H/H replace unidirectional TVS diodes in existing designs?
SMCJ24CAHE3H/H can replace unidirectional variants like SMCJ24AHE3/A only if the circuit applies symmetrical voltage stress - such as AC signal lines, differential buses, or floating grounds. Because SMCJ24CAHE3H/H lacks polarity marking and conducts identically in both directions, it must not be used where DC bias requires strict anode/cathode orientation; doing so may compromise protection effectiveness or cause unintended conduction.
SMCJ24CAHE3H/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:
- 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):
- 38.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ24CAHE3H/H FAQ
1.How can I place an order for SMCJ24CAHE3H/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ24CAHE3H/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 SMCJ24CAHE3H/H reliable?
The price and inventory of SMCJ24CAHE3H/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ24CAHE3H/H is usually 5 days.
3.What payment methods are accepted for SMCJ24CAHE3H/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ24CAHE3H/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ24CAHE3H/H?
SMCJ24CAHE3H/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ24CAHE3H/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 SMCJ24CAHE3H/H?
For technical support, including SMCJ24CAHE3H/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ24CAHE3H/H requirements.
6.How does Aetrix verify that SMCJ24CAHE3H/H is sourced from the original manufacturer or authorized distributors?
All SMCJ24CAHE3H/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 SMCJ24CAHE3H/H meets industry standards.
7.What is the process for return or replacement of SMCJ24CAHE3H/H?
All SMCJ24CAHE3H/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ24CAHE3H/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 SMCJ24CAHE3H/H part is unused and in its original packaging.
Return procedure for SMCJ24CAHE3H/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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