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Vishay General Semiconductor - Diodes Division 1.5SMC24CA-E3/57T
- Part No.:
- 1.5SMC24CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC24CA-E3/57T.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:9,370
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Product details
Overview
1.5SMC24CA-E3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 24 V standoff voltage (VWM), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, 33.2 V maximum clamping voltage at 45.2 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 µs waveform.
For engineers reviewing the 1.5SMC24CA-E3/57T datasheet, 1.5SMC24CA-E3/57T pinout, 1.5SMC24CA-E3/57T application, or 1.5SMC24CA-E3/57T equivalent, this device serves as a critical front-end protection component against ESD, lightning surges, and inductive switching transients in automotive sensor interfaces, industrial I/O modules, and telecom line cards where bidirectional clamping and low leakage (<1 µA at 20.5 V) are required.
Technical Context
The 1.5SMC24CA-E3/57T operates as a symmetric, bidirectional avalanche diode with no polarity marking-enabling identical clamping behavior in both directions. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, while its SMC (DO-214AB) package supports automated placement and meets MSL level 1 per J-STD-020 at 260 °C peak reflow.
It delivers 1500 W transient suppression with fast response time (<1.0 ps), operates across –65 °C to +150 °C junction temperature range, and maintains <1 µA reverse leakage at rated standoff voltage-critical for low-power sensor and microcontroller I/O protection where quiescent current integrity must be preserved.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20.5 V - Maximum continuous reverse operating voltage before significant conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 26.7–29.5 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on during transients without premature triggering. |
| VC (Clamping Voltage) | 33.2 V at 45.2 A (10/1000 µs) - Peak voltage seen by protected circuit under full-rated surge; enables downstream ICs rated ≥3.3 V logic or 24 V analog inputs to survive. |
| PPPM (Peak Pulse Power) | 1500 W - Sustains high-energy transients (e.g., ISO 7637-2 Pulse 1/2b, IEC 61000-4-5 Level 3) without failure when mounted on 8 mm × 8 mm copper pads. |
| ID (Reverse Leakage) | <1 µA at 20.5 V - Minimizes standby power loss and avoids false triggering in high-impedance sensor or reference circuits. |
| TJ max | +150 °C - Supports operation in under-hood automotive and industrial environments without thermal derating penalties up to ambient 125 °C. |
| Package | SMC (DO-214AB) - Industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with standard SMT pick-and-place and reflow profiles. |
Pinout & Package
Package: SMC (DO-214AB), bidirectional configuration - no cathode/anode marking; symmetrical two-terminal construction. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, with MSL level 1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal functions identically as input/output node; no polarity dependency enables flexible PCB layout in AC-coupled or floating lines. |
| Terminal 2 | Anode / Cathode (bidirectional) | Second terminal completes the symmetrical TVS path; differential placement across protected line (e.g., RS-485 A/B) provides common-mode and differential-mode suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (CAN, RS-485), and ungrounded power rails without polarity concerns. |
| 1500 W peak pulse power | Withstands repetitive 10/1000 µs surges up to 45.2 A-meets IEC 61000-4-5 Ed. 3 Level 3 (1 kV line-to-ground, 2 kV line-to-line) without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.18) | Minimizes let-through voltage stress on downstream components-critical for protecting 3.3 V or 5 V logic interfaces adjacent to 24 V systems. |
| MSL Level 1, 260 °C peak | Supports lead-free reflow assembly without preconditioning; eliminates moisture-related popcorning risk in high-volume manufacturing. |
| AEC-Q101 qualified option available | HE3/HM3 variants meet automotive reliability requirements; this E3/57T variant is commercial-grade but shares identical electrical and thermal specs. |
Applications
| Automotive Sensor Protection | Industrial PLC Analog Input |
|---|---|
|
Use Scenario: Protecting 24 V supply and signal lines of wheel speed sensors and pressure transducers exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor output and microcontroller ADC input to clamp transients before signal conditioning stage. Use Value: Maintains signal fidelity under 100 V/10 ms load dump events while adding <1 pF capacitance-no impact on kHz-range sensor bandwidth. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers subjected to field wiring surges and ground potential differences. IC Role / Device Role / Timing Role: Connected across loop terminals (line-to-line) to shunt common-mode surges while preserving loop accuracy via sub-µA leakage. Use Value: Prevents ADC saturation and latch-up during 4 kV EFT bursts (IEC 61000-4-4), ensuring uninterrupted process control in factory automation. |
| Telecom Line Card Protection | Consumer Appliance Motor Control |
|
Use Scenario: Shielding Ethernet PHY interface and PoE detection circuitry from lightning-induced surges on outdoor-facing ports. IC Role / Device Role / Timing Role: Placed at RJ45 connector entry point, clamping both differential and common-mode transients on data pairs. Use Value: Limits let-through voltage to ≤33.2 V during 6 kV contact discharge (IEC 61000-4-2), protecting 2.5 V/3.3 V PHY transceivers without signal distortion. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in washing machines and HVAC blowers connected to 24 V MCU-controlled H-bridges. IC Role / Device Role / Timing Role: Mounted across motor terminals to absorb flyback energy and prevent gate oxide damage to MOSFET drivers. Use Value: Handles 1500 W peak energy from 200 A IFSM-rated surges, extending driver IC lifetime and eliminating need for external snubbers. |
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 | Same VWM (20.5 V) and VC (33.2 V), but lower PPPM (600 W); SMB package (smaller footprint, higher thermal resistance). | Limited to lower-energy transients (e.g., IEC 61000-4-2 ±8 kV air, not IEC 61000-4-5); unsuitable for 24 V industrial power rail protection. | Select when board space is constrained and surge threat level is limited to ESD-only environments. |
| 1.5KE24CA | Same electrical specs but axial-leaded DO-15 package; higher RθJA (100 °C/W vs. 75 °C/W), no SMT compatibility. | Requires through-hole assembly and manual rework; incompatible with automated production and high-density layouts. | Choose only for legacy repair, prototyping, or non-SMT applications where thermal performance is secondary. |
Compared with SMBJ24CA and 1.5KE24CA, the 1.5SMC24CA-E3/57T uniquely balances 1500 W surge handling, SMT manufacturability, and bidirectional symmetry in a compact DO-214AB outline-making it optimal for volume production of automotive and industrial electronics requiring repeatable, high-reliability transient immunity.
Availability
1.5SMC24CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, telecom line cards, and consumer appliance motor controls requiring stable component supply and RoHS-compliant sourcing.
Supply support for 1.5SMC24CA-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, and protection devices with emphasis on reliability, power efficiency, and AEC-Q qualification.
The 1.5SMC Series was developed for high-power, surface-mount transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where robustness, repeatability, and automated assembly are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC24CA-E3/57T under a 10/1000 µs surge?
The 1.5SMC24CA-E3/57T clamps to a maximum of 33.2 V when subjected to its rated peak pulse current of 45.2 A with a 10/1000 µs waveform. This value is guaranteed per Vishay's datasheet (Document Number 88303, page 2) and reflects worst-case voltage seen by protected circuitry during standardized surge testing.
Is the 1.5SMC24CA-E3/57T suitable for automotive applications?
The 1.5SMC24CA-E3/57T is RoHS-compliant and manufactured to commercial-grade specifications. While it shares identical electrical and thermal characteristics with AEC-Q101-qualified variants (e.g., 1.5SMC24CAHE3_A), the E3/57T suffix itself denotes commercial grade-not automotive-qualified. For production automotive use, specify HE3 or HM3 suffixes instead.
Does the 1.5SMC24CA-E3/57T have polarity markings?
No. The 1.5SMC24CA-E3/57T is a bidirectional TVS diode and carries no cathode band or polarity marking. Its symmetrical construction allows either terminal to serve as anode or cathode depending on instantaneous voltage polarity-ideal for AC signal lines and floating bus protection.
What is the maximum operating temperature for the 1.5SMC24CA-E3/57T?
The 1.5SMC24CA-E3/57T has a specified junction temperature range of –65 °C to +150 °C. Its thermal resistance (RθJL = 15 °C/W) and SMC package enable reliable operation at full power up to +125 °C ambient when mounted per recommended 8 mm × 8 mm copper pad layout.
How does the 1.5SMC24CA-E3/57T differ from unidirectional versions like 1.5SMC24A-E3/57T?
The 1.5SMC24CA-E3/57T is bidirectional with symmetrical clamping in both directions and no polarity marking; the unidirectional 1.5SMC24A-E3/57T has a cathode band, conducts only in reverse bias, and is used for DC rail protection. Their VWM, VBR, and VC values differ slightly due to internal structure-24CA has VWM = 20.5 V, while 24A has VWM = 20.5 V but different test conditions and leakage profile.
1.5SMC24CA-E3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 45.2A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC24CA-E3/57T FAQ
1.How can I place an order for 1.5SMC24CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC24CA-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 1.5SMC24CA-E3/57T reliable?
The price and inventory of 1.5SMC24CA-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 1.5SMC24CA-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC24CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC24CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC24CA-E3/57T?
1.5SMC24CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC24CA-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 1.5SMC24CA-E3/57T?
For technical support, including 1.5SMC24CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC24CA-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC24CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC24CA-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 1.5SMC24CA-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC24CA-E3/57T?
All 1.5SMC24CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC24CA-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 1.5SMC24CA-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC24CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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