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Vishay General Semiconductor - Diodes Division SMCJ24A-E3/57T
- Part No.:
- SMCJ24A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ24A-E3/57T.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,132
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Product details
Overview
SMCJ24A-E3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, designed for high-energy surge protection of DC power rails and signal lines. It features a 24 V standoff voltage (VWM), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, 38.6 A peak pulse current (IPPM), 38.9 V clamping voltage (VC) under 10/1000 µs surge, and 1500 W peak pulse power rating.
For engineers reviewing the SMCJ24A-E3/57T datasheet, SMCJ24A-E3/57T pinout, SMCJ24A-E3/57T application, or SMCJ24A-E3/57T equivalent, key selection criteria include unidirectional polarity, 1.0 µA max reverse leakage at 24 V, -55 °C to +150 °C operating junction temperature, RoHS-compliant matte tin-plated leads, and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below its 24 V stand-off voltage and rapidly transitions to low-impedance conduction when transient voltages exceed its 26.7–29.5 V breakdown threshold. Its glass-passivated junction ensures stable avalanche characteristics and low incremental surge resistance.
The device delivers 1500 W peak pulse power handling per 10/1000 µs waveform with a clamping ratio (VC/VBR) of ~1.42 and a temperature coefficient of VBR at 0.096 %/°C - enabling predictable performance across automotive and industrial ambient temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC rail protection level. |
| VBR min/max | 26.7 V / 29.5 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on during transients without premature conduction. |
| VC @ IPPM | 38.9 V at 38.6 A - Clamped voltage seen by protected circuit during full-rated 1500 W surge; limits stress on downstream ICs. |
| PPPM | 1500 W - Peak pulse power dissipation capability under standardized 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 compliance. |
| ID @ VWM | 1.0 µA - Ultra-low reverse leakage at rated standoff voltage; minimizes standby power loss in battery-powered systems. |
| TJ max | +150 °C - Maximum junction temperature rating enabling use in under-hood automotive and high-temperature industrial environments. |
| Package | SMC (DO-214AB) - Surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal footprint; supports automated placement and meets UL 94 V-0. |
Pinout & Package
SMCJ24A-E3/57T uses the standard SMC (DO-214AB) package: a 2-terminal surface-mount device with cathode indicated by a band on one end. The terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker test requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection in unidirectional configuration | Connected to protected line (e.g., +12 V rail); conducts surge current toward ground when overvoltage occurs. |
| Anode (unmarked end) | Ground reference terminal | Connected to system ground plane; completes low-impedance path for transient energy diversion during clamping event. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables robust protection against IEC 61000-4-5 surges up to 4 kV (line-to-earth) without derating in standard PCB layouts. |
| Low clamping voltage (38.9 V) | Keeps protected 24 V systems within safe operating area of downstream MOSFETs and microcontrollers during surge events. |
| Glass passivated junction | Ensures stable, repeatable avalanche behavior over lifetime and temperature, critical for automotive-grade reliability. |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow assembly without moisture sensitivity concerns or pre-bake requirements. |
| AEC-Q101 qualification path | HE3/HM3 suffix variants are qualified for automotive applications; this E3/57T variant shares identical die and construction. |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply lines in engine control units (ECUs) and body control modules from load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery rail and local regulator input. Use Value: Limits transient voltage to ≤38.9 V, preventing damage to 40 V-rated LDOs and MCU power pins during ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding digital input channels of programmable logic controllers against field-wiring induced surges in factory automation. IC Role / Device Role / Timing Role: Standoff-connected TVS on 24 V sensor loop inputs, shunting surge energy to common ground. Use Value: Maintains <1 µA leakage at 24 V, avoiding false triggering of optocoupler-based inputs while clamping fast transients (<1 ns response). |
| Telecom DC Power Feeds | Consumer Appliance Motor Control |
|
Use Scenario: Protecting PoE-powered remote radio units and base station backhaul interfaces from lightning-induced surges on 24–48 V DC feeds. IC Role / Device Role / Timing Role: Primary-level TVS on DC input stage upstream of DC/DC converters and Ethernet PHYs. Use Value: Handles 1500 W pulses without degradation, meeting Telcordia GR-1089-CORE Level 3 surge immunity requirements. |
Use Scenario: Shielding microcontroller GPIOs and gate drivers in smart washing machines from motor commutation spikes. IC Role / Device Role / Timing Role: Localized TVS on 24 V auxiliary supply feeding motor driver ICs and Hall-effect sensors. Use Value: 0.096 %/°C VBR tempco ensures consistent clamping across -40 °C to +85 °C cabinet temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A-E3/52T | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM/VBR/VC specs. | Reduced surge margin; suitable only for lower-energy threats (IEC 61000-4-4 Level 3) and space-constrained designs. | Select when board area is limited and surge threat level is moderate; verify thermal relief on 2-layer PCBs. |
| SMCJ24CA-E3/57T | Bidirectional version with identical VWM (24 V), VBR (26.7–29.5 V), VC (38.9 V), and PPPM (1500 W). | Supports AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where polarity reversal may occur. | Choose for bidirectional protection needs; note absence of polarity marking and doubled ID limit per spec note (3). |
Compared with SMCJ24A-E3/57T, SMBJ24A-E3/52T trades surge capacity for footprint reduction, while SMCJ24CA-E3/57T provides symmetrical clamping without changing clamping performance - making the latter a direct functional alternative for AC or polarity-agnostic circuits.
Availability
SMCJ24A-E3/57T is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, telecom power feeds, and consumer appliance motor controls requiring stable component supply and long-term production continuity.
Supply support for SMCJ24A-E3/57T 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 is engineered for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against ISO 7637, IEC 61000-4-5, and lightning-induced surges is mandatory.
FAQ
What is the maximum clamping voltage of SMCJ24A-E3/57T under full-rated surge conditions?
The SMCJ24A-E3/57T has a maximum clamping voltage (VC) of 38.9 V when subjected to its rated 38.6 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured at TJ = 25 °C and guarantees that protected circuitry sees no more than 38.9 V during worst-case transient events, preserving compatibility with 40 V-rated components downstream of the SMCJ24A-E3/57T.
Is SMCJ24A-E3/57T suitable for automotive applications?
SMCJ24A-E3/57T itself is RoHS-compliant commercial-grade, but it shares identical die and construction with AEC-Q101-qualified variants (e.g., SMCJ24AHE3_A). Its -55 °C to +150 °C operating junction temperature range, glass-passivated junction, and MSL Level 1 rating make it technically suitable for automotive use; however, formal qualification requires the HE3/HM3 suffix. Always confirm qualification status with Vishay for safety-critical deployments involving SMCJ24A-E3/57T.
How does the thermal resistance of SMCJ24A-E3/57T affect its power handling in real-world PCB layouts?
The SMCJ24A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads. In practice, this means sustained 6.5 W power dissipation raises junction temperature by ~488 °C above ambient - confirming that its 6.5 W rating applies only to short-duration surges, not continuous operation. Real-world layout must prioritize thermal relief to avoid exceeding +150 °C TJ during repetitive transients.
What is the reverse leakage current specification for SMCJ24A-E3/57T at its rated standoff voltage?
At its 24 V stand-off voltage (VWM) and TA = 25 °C, the SMCJ24A-E3/57T exhibits a maximum reverse leakage current (ID) of 1.0 µA. This ultra-low leakage ensures minimal impact on battery life in always-on automotive modules and avoids false triggering in high-impedance sensor interfaces - a critical parameter validated per ANSI/IEEE C62.35 standards and confirmed in Vishay's official electrical characteristics table.
Can SMCJ24A-E3/57T be used in place of a bidirectional TVS like SMCJ24CA-E3/57T?
No - SMCJ24A-E3/57T is unidirectional and must be oriented with its cathode toward the protected line; using it in place of SMCJ24CA-E3/57T on AC or polarity-reversing signals will result in forward conduction and failure. The two share identical VWM, VBR, VC, and PPPM values, but their internal structure and marking differ fundamentally. Substitution requires circuit redesign to accommodate polarity constraints and verification of system-level surge directionality before deploying SMCJ24A-E3/57T.
SMCJ24A-E3/57T 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-E3/57T FAQ
1.How can I place an order for SMCJ24A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ24A-E3/57T 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-E3/57T reliable?
The price and inventory of SMCJ24A-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ24A-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ24A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ24A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ24A-E3/57T?
SMCJ24A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ24A-E3/57T 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-E3/57T?
For technical support, including SMCJ24A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ24A-E3/57T requirements.
6.How does Aetrix verify that SMCJ24A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ24A-E3/57T 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-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ24A-E3/57T?
All SMCJ24A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ24A-E3/57T, 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-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ24A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ24A-E3/57T Tags
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