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Vishay General Semiconductor - Diodes Division SMCJ24CAHE3/9AT
- Part No.:
- SMCJ24CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ24CAHE3/9AT.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,306
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Product details
Overview
SMCJ24CAHE3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on power and signal lines. It features 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 in automotive ECUs, industrial I/O modules, and telecom power rails.
For engineers reviewing the SMCJ24CAHE3/9AT datasheet, SMCJ24CAHE3/9AT pinout, SMCJ24CAHE3/9AT application, or SMCJ24CAHE3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, low thermal resistance (RθJL = 15 °C/W), and compatibility with automated SMT assembly on 8 mm × 8 mm copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche breakdown mechanism with glass-passivated junction. Its bidirectional structure ensures identical clamping behavior in both polarities, eliminating polarity sensitivity in AC-coupled or floating lines.
Designed for fast response (<1 ns), it limits induced surges from inductive switching or ESD events while maintaining low leakage (<1 µA at 24 V) and stable temperature coefficient (0.096 %/°C). The SMC package supports high thermal dissipation and meets MSL Level 1 reflow standards up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 26.7 V / 29.5 V at 1 mA - guaranteed breakdown range defining turn-on threshold |
| VC @ IPPM | 38.9 V at 38.6 A - clamped voltage under full 1500 W surge, limiting downstream stress |
| PPPM | 1500 W - peak transient energy absorption capability with 10/1000 µs waveform |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| RθJL | 15 °C/W - low junction-to-lead thermal resistance supporting reliable power dissipation without heatsink |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional - no polarity marking; symmetrical cathode/anode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Accepts reverse surge current during negative voltage excursions; identical clamping to cathode side |
| Cathode | Transient current entry (positive half-cycle) | Accepts forward surge current during positive voltage excursions; matched performance to anode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both directions - eliminates need for polarity-aware layout in AC or differential lines |
| AEC-Q101 qualification | Validated for automotive-grade reliability - enables use in engine control, ADAS sensors, and infotainment power supplies |
| Glass-passivated junction | Enhanced moisture resistance and long-term stability - critical for industrial environments with thermal cycling |
| MSL Level 1 rating | Compatible with standard SMT reflow profiles up to 260 °C peak - supports high-yield automated assembly |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients - improves protection margin for sensitive 3.3 V/5 V logic |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 24 V supply lines in body control modules against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converters and microcontrollers. Use Value: Clamps 1500 W surges to ≤38.9 V, preventing latch-up or damage to downstream 36 V-rated regulators and CAN transceivers. | Use Scenario: Shielding analog input channels of PLC analog I/O cards from field-wiring induced transients. IC Role / Device Role / Timing Role: Front-end TVS on ±10 V sensor signal lines before instrumentation amplifiers. Use Value: Bidirectional symmetry ensures equal protection for both positive and negative signal excursions, preserving signal integrity across full range. |
| Telecom DC Power Input | Consumer Appliance Motor Drive |
Use Scenario: Safeguarding 48 V PoE-powered equipment inputs against lightning-induced surges on outdoor Ethernet links. IC Role / Device Role / Timing Role: First-stage surge suppression before primary DC-DC stage and Ethernet PHY. Use Value: 1500 W PPPM rating handles Category 4 surge levels (IEC 61000-4-5), reducing need for secondary protection stages. | Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances. IC Role / Device Role / Timing Role: Snubber-connected TVS across motor terminals to absorb inductive kickback. Use Value: Fast <1 ns response captures sub-microsecond spikes, preventing gate oxide damage in integrated H-bridge MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC24CA | Lower PPPM (1000 W), same VWM and VC; smaller SMA package (DO-214AC) | Limited to lower-energy surges; unsuitable for ISO 7637-2 Pulse 5a load dump | Select when board space is constrained and surge energy is ≤1000 W |
| SMCJ24CAHM3/9AT | Halogen-free variant; identical electrical specs and AEC-Q101 qualification | No functional difference; required only for RoHS + halogen-free compliance mandates | Select when halogen-free material declaration is contractually required |
Compared with SAC24CA and SMCJ24CAHM3/9AT, the SMCJ24CAHE3/9AT delivers full 1500 W surge handling in a robust SMC package with verified automotive qualification - making it the preferred choice for high-reliability 24 V systems where thermal margin and surge headroom are critical.
Availability
SMCJ24CAHE3/9AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface, telecom DC input, and consumer appliance motor drive applications requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ24CAHE3/9AT 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, MOSFETs, and protection devices with emphasis on reliability and automotive-grade validation.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where robustness and repeatable clamping are non-negotiable.
FAQ
What is the clamping voltage of SMCJ24CAHE3/9AT at its rated peak pulse current?
The SMCJ24CAHE3/9AT has a maximum clamping voltage (VC) of 38.9 V at 38.6 A peak pulse current (IPPM), measured with a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during a full 1500 W transient event, ensuring downstream components remain within safe operating limits. The SMCJ24CAHE3/9AT maintains this clamping performance symmetrically in both directions due to its bidirectional construction.
Is SMCJ24CAHE3/9AT qualified for automotive applications?
Yes, the SMCJ24CAHE3/9AT is AEC-Q101 qualified, having passed stress tests including high-temperature operating life, temperature cycling, and ESD. Its HE3 suffix explicitly denotes RoHS-compliant and AEC-Q101-qualified construction. This makes the SMCJ24CAHE3/9AT suitable for under-hood and chassis-mounted automotive systems such as body control modules, ADAS camera power supplies, and gateway ECUs where reliability under thermal and electrical stress is mandatory.
What package type does SMCJ24CAHE3/9AT use, and what are its mounting requirements?
The SMCJ24CAHE3/9AT uses the SMC (DO-214AB) surface-mount package, with dimensions of 7.75 mm × 6.22 mm × 2.62 mm. It requires minimum 8.0 mm × 8.0 mm copper pads per terminal for rated power dissipation, per Vishay's thermal derating guidelines. The device is MSL Level 1 compliant and supports lead-free reflow up to 260 °C peak, making it compatible with standard automated SMT assembly processes without special handling.
How does the bidirectional design of SMCJ24CAHE3/9AT affect circuit layout?
The bidirectional design of SMCJ24CAHE3/9AT eliminates polarity marking and allows placement without orientation constraints - ideal for AC-coupled lines, differential buses, or floating grounds. Unlike unidirectional TVS diodes, the SMCJ24CAHE3/9AT provides identical clamping characteristics in both directions, so no external series diode or polarity-sensitive routing is needed. This simplifies PCB layout, reduces BOM count, and improves protection consistency across bidirectional interfaces like RS-485 or CAN FD physical layers.
What is the maximum junction temperature and thermal resistance of SMCJ24CAHE3/9AT?
The SMCJ24CAHE3/9AT has a maximum junction temperature (TJ max) of +150 °C and a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W. These values enable sustained operation in high-ambient environments such as automotive engine compartments or industrial enclosures. The low RθJL allows efficient heat transfer to PCB copper, supporting reliable 1500 W transient absorption without external heatsinking when mounted on recommended pad layouts.
SMCJ24CAHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ24CAHE3/9AT FAQ
1.How can I place an order for SMCJ24CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ24CAHE3/9AT 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 SMCJ24CAHE3/9AT reliable?
The price and inventory of SMCJ24CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ24CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ24CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ24CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ24CAHE3/9AT?
SMCJ24CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ24CAHE3/9AT 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 SMCJ24CAHE3/9AT?
For technical support, including SMCJ24CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ24CAHE3/9AT requirements.
6.How does Aetrix verify that SMCJ24CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ24CAHE3/9AT 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 SMCJ24CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ24CAHE3/9AT?
All SMCJ24CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ24CAHE3/9AT, 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 SMCJ24CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ24CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ24CAHE3/9AT Tags
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