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Vishay General Semiconductor - Diodes Division SMCJ24CA/57T
- Part No.:
- SMCJ24CA/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ24CA/57T.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,232
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Product details
Overview
SMCJ24CA/57T from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of sensitive electronics. It features a 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 - deployed on power rails and signal lines in automotive ECUs and industrial I/O modules.
For engineers reviewing the SMCJ24CA/57T datasheet, SMCJ24CA/57T pinout, SMCJ24CA/57T application, or SMCJ24CA/57T equivalent, key selection criteria include bi-directional clamping symmetry, AEC-Q101 qualification, low incremental surge resistance, and compatibility with automated SMT assembly on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ24CA/57T operates as a bi-directional avalanche diode, exhibiting symmetrical breakdown behavior in both polarities with VBR min/max of 26.7 V / 29.5 V at 1.0 mA test current. Its clamping action limits transient-induced voltage excursions to ≤38.9 V under 10/1000 µs surges up to 38.6 A, enabling reliable protection of downstream MOSFETs and microcontrollers without polarity constraints.
Thermally, it sustains junction temperatures from −55 °C to +150 °C, with RθJA = 75 °C/W and RθJL = 15 °C/W. Its glass-passivated junction and MSL Level 1 rating support reflow compatibility up to 260 °C peak, while the unmarked DO-214AB case confirms bi-directional polarity per Vishay's marking convention.
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 1.0 mA - Confirmed symmetrical breakdown threshold in both directions |
| VC @ IPPM | 38.9 V at 38.6 A - Clamped voltage during 10/1000 µs surge, defining worst-case stress on protected circuit |
| PPPM | 1500 W - Peak transient energy handling capacity under standardized waveform |
| ID @ VWM | 1.0 µA - Reverse leakage at rated stand-off, ensuring minimal standby power loss |
| TJ max. | +150 °C - Maximum junction temperature supporting operation in under-hood automotive environments |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, bi-directional configuration with no polarity marking. Case meets UL 94 V-0 flammability rating; matte tin-plated leads comply with J-STD-002 solderability and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (symmetrical) | Bi-directional transient conduction path | No functional distinction between terminals; either terminal serves as cathode or anode depending on transient polarity |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Validates suitability for automotive powertrain and body electronics with extended lifetime reliability |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for 3.3 V/5 V logic |
| MSL Level 1 (260 °C) | Supports standard lead-free reflow profiles without preconditioning or dry-pack requirements |
| Glass-passivated junction | Ensures stable VBR and low leakage across temperature and long-term operational life |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protection of 12 V battery-fed control modules against load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary TVS clamp placed upstream of DC-DC converters and CAN transceivers. Use Value: Limits transients to ≤38.9 V, preventing latch-up or gate oxide damage in 40 V-rated MOSFETs and 3.3 V microcontrollers. |
Use Scenario: Shielding analog outputs (e.g., 4–20 mA loops) from ESD and inductive switching noise in PLC I/O cards. IC Role / Device Role / Timing Role: Bi-directional shunt protector on differential sensor interface lines. Use Value: Symmetrical clamping preserves signal integrity during ±8 kV contact ESD events per IEC 61000-4-2. |
| Telecom Power Input Stage | Consumer USB Port Protection |
Use Scenario: Safeguarding PoE-powered equipment inputs against lightning-induced surges on Ethernet cables. IC Role / Device Role / Timing Role: First-line transient suppressor on primary DC input rail prior to filtering and regulation. Use Value: Absorbs 1500 W pulses without degradation, maintaining system uptime during outdoor deployment. |
Use Scenario: Overvoltage hardening of USB VBUS lines in portable docking stations exposed to hot-plug transients. IC Role / Device Role / Timing Role: Standoff-limited clamp parallel to input capacitor, triggered only above 24 V. Use Value: Prevents false triggering during normal 5 V operation while responding within <1 ps to >30 V spikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA | Lower PPPM (600 W), smaller SMB package (DO-214AA), higher RθJA (110 °C/W) | Suitable for space-constrained consumer boards but insufficient for automotive load-dump duty cycles | Select SMCJ24CA/57T when 1500 W surge handling and thermal robustness are required |
| 1.5KE24CA | Through-hole TO-218 package, same VWM/VC specs, higher IPPM (61.5 A), slower response due to parasitic inductance | Used in legacy industrial power supplies where board real estate allows through-hole mounting | Choose SMCJ24CA/57T for SMT scalability, AEC-Q101 compliance, and lower inductance layout |
Compared with SMBJ24CA and 1.5KE24CA, the SMCJ24CA/57T delivers superior surge power density in a surface-mount footprint, validated for automotive thermal and reliability stress, while avoiding the layout penalties of through-hole alternatives.
Availability
SMCJ24CA/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom power input stages, and consumer USB port protection requiring stable component supply across high-volume production runs.
Supply support for SMCJ24CA/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, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The SMCJ24CA/57T belongs to Vishay's TRANSZORB® family of high-power TVS diodes, engineered specifically for automotive, industrial, and telecom systems demanding robust, bi-directional transient immunity in compact SMT packages.
FAQ
What does the "CA" suffix indicate in SMCJ24CA/57T?
The "CA" suffix in SMCJ24CA/57T explicitly denotes a bi-directional configuration, meaning the device provides symmetrical transient voltage suppression in both forward and reverse polarities. This eliminates the need for polarity-aware placement during PCB assembly and enables use on AC-coupled or floating signal paths where voltage transients may swing positive or negative relative to ground.
Is SMCJ24CA/57T qualified for automotive applications?
Yes, SMCJ24CA/57T is AEC-Q101 qualified, having passed rigorous stress tests including temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge (ESD). This certification validates its suitability for under-hood and chassis-mounted automotive electronics such as body control modules, lighting drivers, and power distribution units where ambient temperatures reach +125 °C and reliability over 15+ years is required.
What is the clamping voltage of SMCJ24CA/57T under surge conditions?
The SMCJ24CA/57T has a maximum clamping voltage (VC) of 38.9 V when subjected to its rated peak pulse current (IPPM) of 38.6 A using the industry-standard 10/1000 µs double-exponential waveform. This value is measured across the device terminals and defines the upper voltage limit imposed on protected circuitry during transient events, directly informing safe operating margins for downstream components like 40 V MOSFETs or 3.3 V logic ICs.
How does the DO-214AB package of SMCJ24CA/57T affect thermal performance?
The DO-214AB (SMCJ) package of SMCJ24CA/57T provides a thermal resistance of RθJA = 75 °C/W (typical) when mounted on 8.0 mm × 8.0 mm copper pads per terminal, enabling efficient heat dissipation during repetitive surge events. Its low RθJL = 15 °C/W also supports effective conduction into PCB copper, making SMCJ24CA/57T more thermally robust than smaller SMB or SOD packages - critical for sustained operation in automotive and industrial power rails.
Can SMCJ24CA/57T replace uni-directional TVS diodes in existing designs?
SMCJ24CA/57T can replace uni-directional TVS diodes only if the circuit topology is inherently symmetric or floating - for example, differential data lines or AC-coupled analog paths. It must not be substituted in DC-biased unidirectional applications (e.g., 12 V supply rail with grounded return) without verifying that reverse conduction does not disrupt bias networks or cause unintended current paths, as SMCJ24CA/57T conducts equally in both directions once VBR is exceeded.
SMCJ24CA/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:
- Obsolete
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ24CA/57T FAQ
1.How can I place an order for SMCJ24CA/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ24CA/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 SMCJ24CA/57T reliable?
The price and inventory of SMCJ24CA/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ24CA/57T is usually 5 days.
3.What payment methods are accepted for SMCJ24CA/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ24CA/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ24CA/57T?
SMCJ24CA/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ24CA/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 SMCJ24CA/57T?
For technical support, including SMCJ24CA/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ24CA/57T requirements.
6.How does Aetrix verify that SMCJ24CA/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ24CA/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 SMCJ24CA/57T meets industry standards.
7.What is the process for return or replacement of SMCJ24CA/57T?
All SMCJ24CA/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ24CA/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 SMCJ24CA/57T part is unused and in its original packaging.
Return procedure for SMCJ24CA/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ24CA/57T Tags
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