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Vishay General Semiconductor - Diodes Division 1.5SMC24CA-E3/9AT
- Part No.:
- 1.5SMC24CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC24CA-E3/9AT.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:7,491
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Product details
Overview
1.5SMC24CA-E3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, designed for high-energy surge protection. It features a 24 V standoff voltage (VWM), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), clamping voltage of 33.2 V at 45.2 A, and operates across –65 °C to +150 °C. It protects signal lines and power rails in automotive sensor interfaces against lightning-induced transients and inductive switching spikes.
For engineers reviewing the 1.5SMC24CA-E3/9AT datasheet, 1.5SMC24CA-E3/9AT pinout, 1.5SMC24CA-E3/9AT application, or 1.5SMC24CA-E3/9AT equivalent, key selection criteria include bidirectional clamping capability, 33.2 V max clamping at rated IPPM, RoHS-compliant matte tin terminations, MSL Level 1 rating, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The 1.5SMC24CA-E3/9AT employs a glass-passivated silicon junction optimized for fast response (<1 ns) to transient overvoltages and low incremental surge resistance. Its bidirectional architecture enables symmetrical clamping in both polarities without polarity marking, making it suitable for AC-coupled or floating signal paths.
It delivers 1500 W peak pulse power under standardized 10/1000 µs waveform conditions with 0.01% duty cycle, derated linearly above 25 °C ambient per Fig. 2. Thermal resistance is 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads), supporting reliable operation under repetitive surge stress when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 24 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown) | 26.7–29.5 V at 1 mA - Confirmed breakdown range ensures predictable turn-on during transients; tight tolerance supports robust design margins. |
| VC (Clamping) | 33.2 V at 45.2 A - Peak voltage seen by protected circuit during full-rated 1500 W surge; critical for IC-level voltage tolerance alignment. |
| PPPM | 1500 W - Peak pulse power handling per 10/1000 µs waveform; validates suitability for IEC 61000-4-5 Level 4 surge immunity. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 8.0 mm × 8.0 mm thermal pad footprint; supports automated assembly and 260 °C reflow. |
| Temperature Range | –65 °C to +150 °C - Full operational and storage range enables use in under-hood automotive and industrial environments. |
| RoHS Status | E3 suffix - RoHS-compliant, commercial-grade, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional device with no polarity marking. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); cathode band absent per bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | One terminal of symmetrical PN junction; conducts during positive surges relative to other terminal. |
| Anode / Cathode (shared) | Transient current exit (negative half-cycle) | Same physical terminals serve dual role; bidirectional conduction eliminates need for orientation during placement. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity up to 4 kV (line-earth) in properly designed PCB layouts. |
| Low clamping ratio (VC/VBR ≈ 1.18) | Minimizes voltage overshoot during clamping, reducing stress on downstream 3.3 V or 5 V logic and analog components. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free reflow profiles without moisture-related delamination or popcorn failure. |
| Glass-passivated junction | Ensures stable leakage performance (<1 μA at VWM) and long-term reliability under thermal cycling and humidity exposure. |
| Bidirectional symmetry | Eliminates polarity concerns in AC signal paths (e.g., CAN, RS-485, audio lines), simplifying layout and BOM management. |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
Use Scenario: Protecting LIN/CAN node sensors (e.g., temperature, pressure) from load-dump and jump-start transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential signal pair or supply rail to clamp ESD and surge energy before reaching transceiver IC. Use Value: Maintains signal integrity during 10/1000 µs surges up to ±33.2 V, preventing latch-up or damage to automotive-grade transceivers like TJA1042. |
Use Scenario: Guarding RS-485 transceivers (e.g., MAX1487) in factory automation PLCs against ground potential differences and lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Placed line-to-line and line-to-ground to suppress differential and common-mode transients while preserving data rate integrity up to 10 Mbps. Use Value: Clamps to ≤33.2 V within <1 ns, ensuring receiver input stays within absolute maximum ratings even during 4 kV IEC 61000-4-5 surges. |
| Consumer USB Power Delivery | Telecom DSL Line Interface |
Use Scenario: Safeguarding USB-C port controller ICs (e.g., FUSB302) and Type-C CC lines from hot-plug ESD and cable-borne surges. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS on CC and VCONN lines to meet IEC 61000-4-2 Level 4 (±15 kV air) without signal distortion. Use Value: Sub-100 pF junction capacitance (typ.) preserves USB PD negotiation timing and prevents false connect/disconnect events. |
Use Scenario: Protecting ADSL/VDSL line drivers and receivers from induced surges on twisted-pair telephone lines exposed to outdoor lightning coupling. IC Role / Device Role / Timing Role: Mounted across tip/ring pair upstream of transformer to absorb longitudinal surges before reaching analog front-end (AFE) ICs. Use Value: Withstands repetitive 1500 W pulses without parameter drift, enabling >10-year field life in telecom central office and DSLAM equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA | Lower peak power (600 W), same VWM/VBR/VC, SMB (DO-214AA) package (smaller footprint, higher RθJA = 85 °C/W). | Preferred where board space is constrained and surge threat level is ≤2 kV IEC 61000-4-5; not suitable for high-repetition-rate industrial surges. | Select SMBJ24CA only if thermal budget allows higher junction temperature rise and peak power demand is ≤600 W. |
| 1.5KE24CA | Through-hole TO-204AE (DO-15) package, identical electrical specs but larger size, lower thermal resistance (RθJA = 60 °C/W), and no MSL rating. | Used in legacy designs or prototyping where hand-soldering is acceptable and board real estate permits axial-leaded devices. | Choose 1.5KE24CA for cost-sensitive, non-SMT production or when higher thermal mass is needed for infrequent high-energy surges. |
Compared with SMBJ24CA and 1.5KE24CA, the 1.5SMC24CA-E3/9AT uniquely balances 1500 W surge capability, SMT compatibility, MSL Level 1 process readiness, and bidirectional symmetry-making it optimal for high-volume automotive and industrial PCBs requiring automated assembly and IEC 61000-4-5 Level 4 compliance.
Availability
1.5SMC24CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial communication bus hardening, and telecom line interface applications requiring stable component supply, consistent RoHS compliance, and traceable lot control.
Supply support for 1.5SMC24CA-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, TVS devices, and optoelectronics with emphasis on reliability, power handling, and automotive qualification.
The 1.5SMC Series was developed specifically for high-power, surface-mount transient suppression in harsh environments-targeting automotive, industrial, and telecom applications demanding AEC-Q101 readiness, 1500 W surge capability, and MSL Level 1 manufacturability.
FAQ
What is the clamping voltage of the 1.5SMC24CA-E3/9AT under full-rated surge current?
The 1.5SMC24CA-E3/9AT has a maximum clamping voltage (VC) of 33.2 V at 45.2 A peak pulse current (IPPM), measured with a 10/1000 µs waveform. This value is guaranteed per the Vishay datasheet (Document Number 88303, Rev. 09-Mar-2026) and defines the upper voltage limit imposed on protected circuits during worst-case surge events. The 1.5SMC24CA-E3/9AT maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC24CA-E3/9AT suitable for automotive applications?
Yes-the 1.5SMC24CA-E3/9AT is RoHS-compliant and qualified to AEC-Q101 when ordered with HE3 or HM3 suffixes; however, the E3/9AT variant is commercial-grade and not AEC-Q101 certified. For automotive production, specify 1.5SMC24CAHE3_A/9AT. The 1.5SMC24CA-E3/9AT remains widely used in automotive prototyping and non-safety-critical subsystems due to its -65 °C to +150 °C operating range and robust surge performance.
What does the "CA" suffix indicate in 1.5SMC24CA-E3/9AT?
The "CA" suffix denotes a bidirectional configuration: the 1.5SMC24CA-E3/9AT functions identically in both polarities, with symmetric breakdown and clamping characteristics. Unlike unidirectional variants (e.g., 1.5SMC24A), it has no cathode band marking and is ideal for AC signal lines, differential buses (CAN, RS-485), or floating power domains where polarity cannot be guaranteed. This is explicitly confirmed in the Vishay 1.5SMC series documentation.
What is the thermal resistance of the 1.5SMC24CA-E3/9AT?
The 1.5SMC24CA-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-leads resistance (RθJL) of 15 °C/W, measured on the recommended 8.0 mm × 8.0 mm copper pad layout. These values are critical for calculating junction temperature rise under sustained power dissipation or repetitive surge conditions. Derating curves in Figure 2 of the Vishay datasheet (88303) must be applied above 25 °C ambient.
Does the 1.5SMC24CA-E3/9AT require orientation during PCB placement?
No-the 1.5SMC24CA-E3/9AT is a bidirectional TVS diode with no polarity marking; both terminals are functionally identical. It can be placed in either orientation on the PCB without affecting clamping behavior. This simplifies automated pick-and-place programming and eliminates orientation-related assembly errors-a key advantage over unidirectional variants like 1.5SMC24A, which require cathode-band alignment.
1.5SMC24CA-E3/9AT 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-E3/9AT FAQ
1.How can I place an order for 1.5SMC24CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC24CA-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 1.5SMC24CA-E3/9AT reliable?
The price and inventory of 1.5SMC24CA-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 1.5SMC24CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC24CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC24CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC24CA-E3/9AT?
1.5SMC24CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC24CA-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 1.5SMC24CA-E3/9AT?
For technical support, including 1.5SMC24CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC24CA-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC24CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC24CA-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 1.5SMC24CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC24CA-E3/9AT?
All 1.5SMC24CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC24CA-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 1.5SMC24CA-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC24CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC24CA-E3/9AT Tags
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