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Vishay General Semiconductor - Diodes Division SMCJ24CA-E3/57T
- Part No.:
- SMCJ24CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ24CA-E3/57T.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,884
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Product details
Overview
SMCJ24CA-E3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on signal or power lines. 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 - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMCJ24CA-E3/57T datasheet, SMCJ24CA-E3/57T pinout, SMCJ24CA-E3/57T application, or SMCJ24CA-E3/57T equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.62), AEC-Q101 qualification eligibility (via HE3 suffix variants), RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM), while the low incremental surge resistance supports consistent clamping under repetitive transient stress.
The device meets MSL Level 1 per J-STD-020 with a 260 °C reflow peak, and thermal resistance values (RθJA = 75 °C/W, RθJL = 15 °C/W) indicate effective heat dissipation when mounted on recommended pad layout - critical for sustaining 1500 W surge capability without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR min/max | 26.7 V / 29.5 V at IT = 1.0 mA - verified breakdown range ensures reliable triggering across process variation and temperature. |
| VC @ IPPM | 38.9 V at 38.6 A (10/1000 µs) - clamping voltage limits downstream component stress during ESD or load-switching surges. |
| PPPM | 1500 W - peak transient energy handling capacity suitable for IEC 61000-4-5 Level 4 (4 kV) surge immunity designs. |
| ID @ VWM | <1.0 µA - ultra-low leakage preserves signal integrity and battery life in always-on sensor or communication circuits. |
| TJ max | +150 °C - extended junction temperature rating enables use in under-hood automotive or high-ambient industrial environments. |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height for high-power density PCB layouts. |
Pinout & Package
SMCJ24CA-E3/57T uses the SMC (DO-214AB) package: a molded, low-profile, surface-mount case with two unmarked terminals (bidirectional configuration). No polarity marking is present; both terminals are functionally identical for transient suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (symmetrical) | Either terminal serves as input/output path for bidirectional surge current; no DC polarity dependency. |
| Terminal 2 | Anode/Cathode (symmetrical) | Completes the transient shunt path; mounting on 8.0 mm × 8.0 mm copper pads per terminal maximizes thermal and current-handling performance. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or floating power rails without external polarity management. |
| 1500 W peak pulse power | Supports robust immunity against high-energy transients such as ISO 7637-2 pulse 5a (load dump) in 24 V vehicle systems. |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes overvoltage exposure to protected ICs - critical for safeguarding 3.3 V or 5 V logic interfaced via level-shifting circuitry. |
| AEC-Q101 qualification path | HE3/HM3 suffix variants are qualified for automotive applications; this E3/57T variant shares identical die and construction for design reuse. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking - reduces manufacturing overhead in high-volume SMT lines. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppresses load-dump transients (up to 60 V, 100 ms) on 24 V supply rails feeding ECUs, body controllers, or lighting modules. IC Role / Device Role / Timing Role: Shunts surge current away from downstream DC/DC converters and microcontrollers during alternator regulation failure. Use Value: Prevents latch-up or permanent damage to 24 V-input PMICs and CAN transceivers by limiting rail voltage to ≤38.9 V during 38.6 A surges. |
Use Scenario: Protects analog front-end inputs of pressure, temperature, or position sensors exposed to ESD and inductive switching noise in factory automation. IC Role / Device Role / Timing Role: Acts as first-line clamp on sensor output lines (e.g., 4–20 mA or 0–10 V) before signal conditioning amplifiers. Use Value: Maintains measurement accuracy by limiting transient-induced offset shifts and preventing amplifier saturation during 8 kV contact ESD events. |
| Telecom Data Line Surge Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Safeguards RS-485 transceivers and Ethernet PHYs in outdoor base stations or networked building controls against lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential pairs (A/B) or power/ground rails in telecom interface modules. Use Value: Ensures interoperability with IEC 61000-4-5 (4 kV line-earth, 2 kV line-line) while preserving signal integrity up to 10 Mbps due to low junction capacitance. |
Use Scenario: Shields MCU GPIOs and gate drivers controlling BLDC or stepper motors in smart home appliances from back-EMF spikes during commutation. IC Role / Device Role / Timing Role: Mounted at motor connector entry point to divert inductive kickback before it reaches isolation barriers or logic-level shifters. Use Value: Eliminates need for discrete RC snubbers or varistors, reducing BOM count and PCB area while achieving <10 ns response time to sub-microsecond transients. |
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-TB-E3 | Same VWM (24 V) and VC (38.9 V), but lower PPPM (1000 W); smaller SMA package (DO-214AC). | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for load-dump or lightning surge. | Select when space-constrained layouts prioritize footprint over surge rating - not a drop-in replacement for 1500 W requirements. |
| 1.5KE24CA | Through-hole TO-218 package; identical VWM/VC/PPPM specs but higher RθJA (not specified, typically >100 °C/W). | Requires wave soldering or manual assembly; less compatible with automated SMT lines and high-density boards. | Choose for legacy through-hole designs or prototyping where thermal mass compensates for poorer board-level cooling. |
Compared with SAC24CA-TB-E3 and 1.5KE24CA, SMCJ24CA-E3/57T delivers optimal balance of high surge capability (1500 W), SMT manufacturability, and thermal performance in compact form - making it preferred for new automotive and industrial designs requiring AEC-Q101 scalability and IPC-compliant reflow.
Availability
SMCJ24CA-E3/57T is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom data line surge suppression requiring stable component supply and full traceability.
Supply support for SMCJ24CA-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, power efficiency, and automotive-grade qualification.
The SMCJ series was developed specifically for high-power transient suppression in harsh environments - targeting 24 V and 48 V systems in automotive, industrial, and telecom infrastructure where robustness and repeatable clamping are mandatory.
FAQ
What is the clamping voltage of SMCJ24CA-E3/57T at its rated peak pulse current?
The SMCJ24CA-E3/57T 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 standard 10/1000 µs waveform. This value is measured under defined test conditions per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for protected circuitry. The SMCJ24CA-E3/57T maintains this clamping performance across its operational temperature range of -55 °C to +150 °C.
Is SMCJ24CA-E3/57T suitable for automotive applications requiring AEC-Q101 qualification?
While SMCJ24CA-E3/57T itself carries the commercial-grade E3 suffix, Vishay offers AEC-Q101-qualified versions under the HE3 suffix (e.g., SMCJ24CAHE3_A/H). The SMCJ24CA-E3/57T shares identical die, packaging, and electrical characteristics - enabling direct design-in and qualification path migration. For production automotive programs, engineers should specify the HE3 variant; SMCJ24CA-E3/57T remains ideal for pre-qualification development and industrial applications.
How does the bidirectional nature of SMCJ24CA-E3/57T affect its placement in circuit design?
The bidirectional structure of SMCJ24CA-E3/57T eliminates polarity constraints - both terminals are functionally identical, and no cathode band marking is present. This allows placement across any two nodes requiring symmetrical transient suppression, such as differential signal pairs (RS-485 A/B), AC power inputs, or floating grounds. Unlike unidirectional TVS diodes, the SMCJ24CA-E3/57T avoids risk of incorrect orientation during assembly or failure under reverse-biased surge events.
What is the thermal resistance profile of SMCJ24CA-E3/57T and how does it impact PCB layout?
SMCJ24CA-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W when mounted on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. To sustain its 1500 W surge rating, PCB layout must replicate this pad area and ensure adequate copper thickness (≥2 oz) and thermal vias beneath each pad. Reduced pad size increases junction temperature rise and risks parametric shift or failure during repeated surges.
Can SMCJ24CA-E3/57T be used to protect 3.3 V or 5 V logic circuits directly?
No - SMCJ24CA-E3/57T is not suitable for direct protection of 3.3 V or 5 V logic rails due to its 24 V stand-off voltage (VWM) and 38.9 V clamping voltage (VC), which exceed safe absolute maximum ratings of low-voltage ICs. It is intended for 24 V system-level protection (e.g., power input, motor drive outputs, sensor supply lines). For 3.3 V/5 V signal lines, lower-voltage TVS devices such as SMBJ5.0CA or ESD5Z series should be selected. The SMCJ24CA-E3/57T protects upstream components that feed into those low-voltage domains.
SMCJ24CA-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:
- -
- 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-E3/57T FAQ
1.How can I place an order for SMCJ24CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ24CA-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 SMCJ24CA-E3/57T reliable?
The price and inventory of SMCJ24CA-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 SMCJ24CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ24CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ24CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ24CA-E3/57T?
SMCJ24CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ24CA-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 SMCJ24CA-E3/57T?
For technical support, including SMCJ24CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ24CA-E3/57T requirements.
6.How does Aetrix verify that SMCJ24CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ24CA-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 SMCJ24CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ24CA-E3/57T?
All SMCJ24CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ24CA-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 SMCJ24CA-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ24CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ24CA-E3/57T Tags
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