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Vishay General Semiconductor - Diodes Division SMCJ24A-E3/9AT
- Part No.:
- SMCJ24A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ24A-E3/9AT.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,534
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Product details
Overview
SMCJ24A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, with 24 V standoff voltage (VWM), 26.7–29.5 V breakdown voltage (VBR at 1 mA), and 1500 W peak pulse power rating (10/1000 µs waveform). It clamps transients to ≤38.9 V at 38.6 A surge current and operates from –55 °C to +150 °C - deployed for protecting MOSFETs, ICs, and sensor signal lines in automotive power systems.
For engineers reviewing the SMCJ24A-E3/9AT datasheet, SMCJ24A-E3/9AT pinout, SMCJ24A-E3/9AT application, or SMCJ24A-E3/9AT equivalent, key selection criteria include unidirectional polarity, 1.0 µA max reverse leakage at 24 V, 0.096 %/°C VBR temperature coefficient, and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
The SMCJ24A-E3/9AT uses a glass-passivated silicon junction optimized for fast response (<1 ps) to ESD and lightning-induced transients. Its low incremental surge resistance ensures stable clamping under repetitive 10/1000 µs surges up to 38.6 A, while maintaining <9.2 V forward voltage drop at 100 A (unidirectional only).
Designed for surface-mount automation, it meets J-STD-020 MSL Level 1 (peak reflow 260 °C), JEDEC JESD201 Class 2 whisker resistance, and UL 94 V-0 flammability for molding compound - supporting high-reliability PCB assembly in automotive and industrial environments.
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 at 1 mA - verified breakdown threshold defining turn-on precision |
| VC @ IPPM | ≤38.9 V at 38.6 A - clamping voltage limiting downstream component stress during surge |
| PPPM | 1500 W - peak transient power handling capability per 10/1000 µs waveform |
| IFSM | 200 A - non-repetitive 8.3 ms half-sine surge current rating (unidirectional only) |
| TJ range | –55 °C to +150 °C - junction temperature range enabling under-hood automotive use |
| Leakage ID | ≤1.0 µA at 24 V - minimal standby power loss and signal integrity preservation |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, 0.220–0.246 inch body width, cathode band marking on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection point | Reverse-biased terminal accepting transient energy; must connect toward protected circuit's positive rail |
| Anode (non-banded end) | Cathode-side connection point | Reference/ground return path; ties to system ground or low-impedance return plane |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMC package | Enables compact layout in space-constrained automotive ECUs and industrial controllers |
| Glass-passivated junction | Ensures long-term stability and reduced parameter drift under thermal cycling |
| 1500 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/5a surges without degradation in 12 V systems |
| AEC-Q101 qualification path | HE3/HM3 suffix variants support automotive-grade reliability validation per stress test requirements |
| MSL Level 1 rating | Allows single-reflow assembly without moisture sensitivity concerns or baking preconditioning |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails in body control modules against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage. Use Value: Clamps 12 V rail transients to ≤38.9 V, preventing overvoltage damage to downstream regulators rated for 40 V max input. | Use Scenario: Shielding analog output lines of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS connected across sensor output and ground, adjacent to connector entry point. Use Value: Limits transient voltage to <39 V within nanoseconds, preserving ADC input integrity and avoiding latch-up in microcontroller front-end circuits. |
| Consumer Power Adapter Input Stage | Telecom Line Card Surge Protection |
Use Scenario: Safeguarding AC-DC adapter primary-side rectifier and controller ICs from line surges. IC Role / Device Role / Timing Role: Mounted across bulk capacitor input, shunting surge energy before filtering stage. Use Value: Absorbs 1500 W pulses without failure, maintaining system uptime during 6 kV ring wave tests per IEC 61000-4-5. | Use Scenario: Protecting Ethernet PHY interface components on telecom base station line cards from induced lightning surges. IC Role / Device Role / Timing Role: Paired with common-mode chokes as part of hybrid protection network on RJ45 port. Use Value: Provides differential-mode clamping with <1 ns response, reducing residual voltage seen by PHY to safe levels below 30 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC24-01G | Lower PPPM (600 W), smaller SMA package, higher VC (43 V) | Not suitable for ISO 7637-2 Pulse 5a; limited to consumer-grade surge immunity | Select when board space is critical and surge energy is ≤600 W |
| 1.5KE24A | Through-hole DO-201 package, same VWM/VC, lower IPPM (41.7 A) | Requires manual or wave soldering; incompatible with automated SMT lines | Select only for legacy through-hole designs or prototyping where rework tolerance is prioritized |
Compared with SAC24-01G and 1.5KE24A, the SMCJ24A-E3/9AT delivers superior surge robustness (1500 W vs. 600 W/1500 W), SMT compatibility, and tighter VBR tolerance - making it optimal for production automotive and industrial PCBs requiring high-volume placement and repeatable clamping performance.
Availability
SMCJ24A-E3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, and telecom line card surge suppression requiring stable component supply across extended temperature ranges and high-volume manufacturing cycles.
Supply support for SMCJ24A-E3/9AT 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, efficiency, and application-specific optimization.
The SMCJ series targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom systems where robustness against load dump, ESD, and lightning surges is mission-critical.
FAQ
What is the standoff voltage rating of the SMCJ24A-E3/9AT?
The SMCJ24A-E3/9AT has a standoff voltage (VWM) of 24 V - the maximum DC or continuous reverse operating voltage it can withstand without entering avalanche conduction. This value ensures compatibility with standard 24 V industrial control systems and 12 V automotive systems with margin, and is confirmed in the Vishay datasheet Document Number 88394, Table on page 2.
Does the SMCJ24A-E3/9AT meet automotive qualification standards?
The SMCJ24A-E3/9AT itself is commercial-grade (E3 suffix), but Vishay offers AEC-Q101 qualified versions under HE3/HM3 suffixes (e.g., SMCJ24AHE3_A/I). The SMCJ24A-E3/9AT shares identical electrical and thermal characteristics with those qualified variants, enabling direct design-in where qualification is pursued later in the program.
What is the clamping voltage of the SMCJ24A-E3/9AT at its rated surge current?
The SMCJ24A-E3/9AT clamps to a maximum of 38.9 V at its peak pulse current (IPPM) of 38.6 A under a 10/1000 µs waveform. This clamping voltage is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Can the SMCJ24A-E3/9AT be used in bidirectional configurations?
No - the SMCJ24A-E3/9AT is unidirectional only, indicated by the "A" suffix and cathode band marking. For bidirectional operation, select the SMCJ24CA variant (e.g., SMCJ24CA-E3/9AT), which provides symmetrical clamping in both polarities and omits the polarity marking per Vishay's ordering guide on page 3 of document 88394.
What is the thermal resistance of the SMCJ24A-E3/9AT from junction to ambient?
The typical junction-to-ambient thermal resistance (RθJA) of the SMCJ24A-E3/9AT is 75 °C/W when mounted on the minimum recommended pad layout (0.31" × 0.31" copper pads per terminal). This value assumes no additional heatsinking and informs derating calculations for sustained power dissipation in high-temperature environments.
SMCJ24A-E3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ24A-E3/9AT FAQ
1.How can I place an order for SMCJ24A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ24A-E3/9AT 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 SMCJ24A-E3/9AT reliable?
The price and inventory of SMCJ24A-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ24A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ24A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ24A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ24A-E3/9AT?
SMCJ24A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ24A-E3/9AT 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 SMCJ24A-E3/9AT?
For technical support, including SMCJ24A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ24A-E3/9AT requirements.
6.How does Aetrix verify that SMCJ24A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ24A-E3/9AT 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 SMCJ24A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ24A-E3/9AT?
All SMCJ24A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ24A-E3/9AT, 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 SMCJ24A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ24A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ24A-E3/9AT Tags
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