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Taiwan Semiconductor Corporation 1.5SMC24CA
- Part No.:
- 1.5SMC24CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC24CA.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,580
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Product details
Overview
1.5SMC24CA from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with breakdown voltage 22.8–25.2 V at 1 mA test current, working stand-off voltage 20.5 V, clamping voltage 33.2 V at 47 A peak pulse current, and junction temperature range −55 °C to +150 °C. It protects telecom interfaces, industrial I/O ports, and automotive body control modules against ESD, lightning-induced surges, and load-switching transients.
For engineers reviewing the 1.5SMC24CA datasheet, 1.5SMC24CA pinout, 1.5SMC24CA application, or 1.5SMC24CA equivalent, key selection criteria include bidirectional clamping capability, 1500 W peak pulse power rating, 33.2 V max clamping at 47 A, DO-214AB mechanical compatibility, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive transient immunity.
Technical Context
The 1.5SMC24CA is a glass-passivated, bipolar junction TVS diode designed for unidirectional or bidirectional surge suppression in DC power rails and signal lines. Its symmetrical breakdown behavior (VBR = 22.8–25.2 V in both directions) enables direct replacement of unidirectional variants without polarity concerns, and its <1 ps response time ensures sub-nanosecond transient capture before downstream IC damage.
Thermally, it features RθJA = 50 °C/W and RθJC = 15 °C/W, supporting sustained operation up to 150 °C junction temperature. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1, enabling standard reflow assembly without pre-bake.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1 mA | 22.8–25.2 V - Ensures reliable turn-on before system overvoltage exceeds 25.2 V under surge conditions |
| VWM | 20.5 V - Maximum continuous DC or RMS voltage the device blocks without leakage exceeding 1 µA |
| VC @ IPPM = 47 A | 33.2 V - Clamped voltage seen by protected circuit during worst-case 1500 W transient (10/1000 µs waveform) |
| PPK | 1500 W - Peak pulse power handling per single 10/1000 µs surge, derated linearly above 25 °C ambient |
| IR @ VWM | <1 µA - Minimal standby leakage, critical for low-power battery-backed systems and high-impedance sensor inputs |
| TJ Range | −55 to +150 °C - Supports operation in under-hood automotive, industrial motor drives, and outdoor telecom enclosures |
| Package | DO-214AB (SMC) - Standardized 7.11 × 6.22 mm surface-mount outline compatible with automated pick-and-place and IPC-7351B land patterns |
Pinout & Package
Package: DO-214AB (SMC), molded plastic case with matte tin-plated leads, polarity indicated by cathode band (bidirectional operation renders polarity irrelevant for 1.5SMC24CA).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal serves as input/output; no polarity dependency-enables flexible PCB layout and eliminates orientation errors during assembly |
| Case / Body | Thermal and mechanical interface | Provides primary heat path to PCB copper; requires ≥100 mm² thermal pad for full 1500 W pulse dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM performance in both directions-eliminates need for polarity-aware routing on differential or AC-coupled lines |
| ISO 7637-2 compliance | Validated against Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (switching noise)-certified for automotive ECUs and body electronics |
| Sub-1 ps response time | Clamps transients before propagation into sensitive analog front-ends or microcontroller I/O-critical for USB, CAN, RS-485, and Ethernet PHY protection |
| Moisture Sensitivity Level 1 | No bake required prior to reflow; supports standard JEDEC J-STD-020 profile-reduces manufacturing cost and cycle time |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU-meets environmental requirements for global OEM shipments |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protects 12 V supply and LIN bus lines from load-dump spikes (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary surge clamp placed at connector entry point, operating in bidirectional mode to absorb positive/negative transients. Use Value: Limits clamped voltage to ≤33.2 V, keeping MCU supply rail within safe operating area and preventing latch-up or gate oxide damage. |
Use Scenario: Shields 24 V DC digital input channels from field-wiring induced surges (IEC 61000-4-5 Level 3) and relay contact bounce. IC Role / Device Role / Timing Role: Standoff protector across input optocoupler terminals, conducting only during >20.5 V transients. Use Value: Leakage <1 µA preserves input hysteresis threshold accuracy; 1500 W rating handles repeated 2 kV/1 Ω surge events without degradation. |
| Telecom DSL Line Interface | Medical Patient Monitor ECG Lead Port |
Use Scenario: Guards ADSL/VDSL line drivers and receivers against lightning-induced common-mode surges on twisted-pair copper lines. IC Role / Device Role / Timing Role: Bidirectional TVS placed between tip/ring and ground, symmetrically referenced to protect differential signaling paths. Use Value: 33.2 V clamping prevents saturation of line driver amplifiers and maintains signal integrity during 10/1000 µs surges up to 47 A. |
Use Scenario: Safeguards high-impedance ECG amplifier inputs from electrostatic discharge during patient connection/disconnection. IC Role / Device Role / Timing Role: First-line ESD suppressor at connector, rated for IEC 61000-4-2 ±15 kV contact discharge. Use Value: Sub-1 ps response captures ESD events before reaching amplifier input stage; <1 µA leakage avoids DC offset drift in precision analog front-end. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA (Bourns) | Same DO-214AA (SMB) package, 600 W rating, VC = 38.9 V @ 22.3 A - lower power, higher clamping | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or high-current lightning tests | Select when board space constraints require SMB footprint and surge energy is ≤600 W |
| SMCJ24CA (Littelfuse) | Same DO-214AB (SMC) package, 1500 W rating, VC = 38.9 V @ 38.7 A - identical power but 5.7 V higher clamping than 1.5SMC24CA | Higher clamping may exceed safe voltage margin for 3.3 V or 5 V logic rails downstream | Prefer 1.5SMC24CA where clamping voltage headroom is tight (e.g., protecting 24 V systems with 30 V absolute max ratings) |
Compared with SMBJ24CA and SMCJ24CA, the 1.5SMC24CA delivers the lowest clamping voltage (33.2 V) among DO-214AB 1500 W bidirectional TVS diodes, maximizing voltage margin for protected circuits while maintaining full ISO 7637-2 compliance and MSL-1 manufacturability.
Availability
1.5SMC24CA is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, telecom line cards, and medical diagnostic equipment requiring stable component supply and long-term obsolescence management.
Supply support for 1.5SMC24CA 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with ISO 9001 and IATF 16949 certified production facilities.
The 1.5SMCxxCA series was developed for high-reliability transient suppression in automotive and industrial environments, emphasizing low clamping voltage, robust surge endurance, and seamless SMT manufacturability.
FAQ
What is the maximum clamping voltage of the 1.5SMC24CA under a 1500 W surge?
The 1.5SMC24CA has a maximum clamping voltage (VC) of 33.2 V when subjected to its rated peak pulse current of 47 A (10/1000 µs waveform), corresponding to 1500 W peak power. This value is measured per ANSI/IEEE C62.35 and confirmed in the manufacturer's electrical specifications table for the CA-suffix bidirectional variant.
Is the 1.5SMC24CA suitable for automotive applications requiring ISO 7637-2 compliance?
Yes, the 1.5SMC24CA is explicitly validated to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test profiles. Its 1500 W rating, low clamping voltage, and −55 °C to +150 °C operating range make it appropriate for engine control units, body control modules, and infotainment power supplies in passenger vehicles and commercial trucks.
How does the "CA" suffix in 1.5SMC24CA differ from "A" or no suffix?
The "CA" suffix denotes a bidirectional configuration with symmetrical breakdown and clamping characteristics in both polarities. In contrast, "A" indicates a tighter VBR tolerance (±5% vs. ±10% for non-A), and no suffix implies unidirectional operation. Thus, 1.5SMC24CA combines ±5% VBR tolerance with bidirectional functionality-distinct from 1.5SMC24A (unidirectional) or 1.5SMC24 (wider-tolerance unidirectional).
What is the thermal resistance from junction to ambient for the 1.5SMC24CA?
The 1.5SMC24CA has a typical junction-to-ambient thermal resistance (RθJA) of 50 °C/W when mounted on a standard FR-4 PCB with minimum recommended copper area. This value assumes natural convection and is used to calculate allowable power dissipation at elevated ambient temperatures using the derating curve in Figure 2 of the datasheet.
Does the 1.5SMC24CA require special handling for moisture sensitivity?
No-the 1.5SMC24CA is rated at Moisture Sensitivity Level 1 per J-STD-020, meaning it can be stored indefinitely at ≤30 °C/60% RH and processed using standard reflow profiles without baking. This eliminates pre-conditioning steps and reduces manufacturing complexity compared to MSL-3 or higher devices.
1.5SMC24CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC
- 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):
- 47A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC24CA FAQ
1.How can I place an order for 1.5SMC24CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC24CA 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 reliable?
The price and inventory of 1.5SMC24CA 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 is usually 5 days.
3.What payment methods are accepted for 1.5SMC24CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC24CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC24CA?
1.5SMC24CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC24CA 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?
For technical support, including 1.5SMC24CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC24CA requirements.
6.How does Aetrix verify that 1.5SMC24CA is sourced from the original manufacturer or authorized distributors?
All 1.5SMC24CA 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 meets industry standards.
7.What is the process for return or replacement of 1.5SMC24CA?
All 1.5SMC24CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC24CA, 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 part is unused and in its original packaging.
Return procedure for 1.5SMC24CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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