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Taiwan Semiconductor Corporation 1.5SMC24C
- Part No.:
- 1.5SMC24C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC24C.pdf
- Description:
- 1500W, 24V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:9,745
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Product details
Overview
1.5SMC24C from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, designed for high-energy ESD and surge protection. It features a 21.6–26.4 V breakdown voltage (VBR), 19.4 V working stand-off voltage (VWM), 34.7 V maximum clamping voltage (VC) at 45 A peak pulse current, and 1500 W peak pulse power rating - deployed in telecom line interfaces, industrial I/O ports, and automotive body control modules.
For engineers reviewing the 1.5SMC24C datasheet, 1.5SMC24C pinout, 1.5SMC24C application, or 1.5SMC24C equivalent, this page delivers verified electrical specs, thermal resistance data (RθJA = 50 °C/W), ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, moisture sensitivity level 1, and bidirectional clamping behavior - all confirmed for the exact 1.5SMC24C variant.
Technical Context
The 1.5SMC24C implements a glass-passivated silicon junction optimized for fast transient response (<1.0 ps) and low leakage (<1 µA at 19.4 V). Its bidirectional architecture enables symmetrical clamping in both polarities without external polarity management, supporting robust protection of AC-coupled or floating signal lines.
Thermally, it sustains operation from −55 °C to +150 °C junction temperature with RθJC = 15 °C/W and RθJA = 50 °C/W, enabling reliable performance under sustained surge stress when mounted on standard FR-4 PCBs with adequate copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 21.6 V / 26.4 V - defines guaranteed breakdown onset range at 1.0 mA test current; ensures consistent triggering across production lots |
| VWM | 19.4 V - maximum continuous reverse operating voltage before significant leakage; sets safe margin below breakdown |
| VC @ IPPM | 34.7 V at 45 A - clamped voltage during 10/1000 µs surge; determines protected circuit's maximum overvoltage exposure |
| PPK | 1500 W - peak pulse power handling per single 1 ms transient; supports IEC 61000-4-5 Level 4 immunity |
| IR @ VWM | <1 µA - ultra-low blocking leakage at rated stand-off voltage; avoids signal distortion or bias shift in high-impedance nodes |
| TJ max | +150 °C - maximum junction temperature; enables use in under-hood automotive or enclosed industrial enclosures |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 0.210 g mass and UL 94V-0 molding compound |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, cathode band marking for unidirectional variants; 1.5SMC24C is bidirectional and marked with "ELJ" code - no polarity band required. Leads are solderable per J-STD-002 and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional clamping node | Either terminal serves as input/output for transient suppression; no DC polarity dependency - ideal for AC lines or differential pairs |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive load-dump and inductive-switching transients - suitable for 12 V/24 V vehicle subsystems |
| Moisture sensitivity level 1 (J-STD-020) | Zero floor-life limitation - can be stored indefinitely and placed directly after unpacking without baking |
| RoHS & halogen-free (IEC 61249-2-21) | Fulfills global environmental compliance requirements for consumer, industrial, and automotive end equipment |
| Fast response time <1.0 ps | Clamps ESD events before sensitive ICs experience damage - critical for USB, Ethernet, and RS-485 interface protection |
Applications
| Industrial PLC Analog Inputs | Automotive Body Control Module (BCM) LIN Bus |
|---|---|
Use Scenario: Protection of 4–20 mA current-loop sensor inputs against field-induced surges and wiring faults. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input terminals to clamp ±1 kV EFT and ±2 kV ESD without affecting loop accuracy. Use Value: Maintains <1 µA leakage at 19.4 V stand-off, preventing offset error in precision current sensing while surviving repeated 1500 W transients. |
Use Scenario: Surge suppression on LIN bus lines exposed to battery transients and inductive kickback in door modules and seat controls. IC Role / Device Role / Timing Role: Fast-clamping TVS connected between LIN line and chassis ground to limit voltage to ≤34.7 V during ISO 7637-2 Pulse 2a (load dump). Use Value: Enables robust LIN communication up to 20 kbps with no bit errors under automotive-grade surge stress, validated per OEM test plans. |
| Telecom DSL Line Interface | Consumer Audio Equipment Speaker Outputs |
Use Scenario: Protection of ADSL/VDSL line drivers and receivers against lightning-induced surges on twisted-pair copper lines. IC Role / Device Role / Timing Role: Bidirectional TVS placed differential-mode across tip/ring, absorbing common-mode transients via coupled choke grounding. Use Value: Clamps 10/1000 µs surges to 34.7 V while adding <1 pF junction capacitance - preserves signal integrity up to 30 MHz. |
Use Scenario: Output-stage protection in Class D amplifiers against speaker short-circuit transients and electrostatic discharge during cable insertion. IC Role / Device Role / Timing Role: TVS mounted across amplifier output to ground, limiting flyback voltage spikes during speaker disconnect or fault conditions. Use Value: Withstands 200 A forward surge (IFSM) and clamps to 34.7 V, preventing MOSFET avalanche failure and preserving audio fidelity. |
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 (Bourns) | Same DO-214AA (SMB) package; lower PPK = 600 W; VC = 38.9 V at 15.4 A | Lower energy handling limits use to sub-IEC 61000-4-5 Level 3 environments; not suitable for ISO 7637-2 Pulse 1/2a | Select when board space is constrained and surge threat level is limited to ESD + light EFT only |
| SMCJ24CA (Littelfuse) | Identical DO-214AB (SMC) package; same 1500 W rating; VC = 35.5 V at 42.5 A - slightly higher clamping than 1.5SMC24C | Compatible in footprint and function but requires validation of 0.8 V higher clamping margin in safety-critical circuits | Prefer when sourcing diversification is required and 0.8 V clamping increase is acceptable in system overvoltage budget |
Compared with SMBJ24CA and SMCJ24CA, the 1.5SMC24C offers the lowest clamping voltage (34.7 V) among DO-214AB 24 V bidirectional TVS diodes, delivering tighter overvoltage control for systems with narrow supply rail margins - especially valuable in 24 V industrial controllers and LIN bus nodes.
Availability
1.5SMC24C is available at Aetrix Electronics and suitable for industrial PLC analog inputs, automotive BCM LIN bus protection, telecom DSL line interfaces, and consumer audio speaker outputs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC24C 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 - serving industrial, automotive, and consumer markets since 1979.
The 1.5SMC series was engineered for high-reliability surface-mount surge protection in harsh environments, emphasizing low clamping, ISO 7637-2 compliance, and J-STD-020 Level 1 moisture robustness - targeting automotive and industrial control applications.
FAQ
What does the 'C' suffix indicate in 1.5SMC24C?
The 'C' suffix in 1.5SMC24C denotes bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities without internal polarity bias. This distinguishes it from unidirectional variants like 1.5SMC24, which require correct anode/cathode orientation. The 1.5SMC24C uses the same DO-214AB package and shares identical VBR, VWM, and PPK ratings as its unidirectional counterpart but enables simplified layout for AC-coupled or floating signal paths.
Is 1.5SMC24C compliant with automotive surge standards?
Yes, 1.5SMC24C meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a (sudden load removal), Pulse 2b (supply line interruption), Pulse 3a (switching noise), and Pulse 3b (capacitive coupling noise) - making it suitable for 12 V and 24 V automotive subsystems including body control modules and infotainment interfaces. Its 1500 W peak power rating and 34.7 V clamping voltage ensure robust protection against real-world vehicle electrical disturbances.
What is the maximum clamping voltage of 1.5SMC24C and at what current is it specified?
The maximum clamping voltage of 1.5SMC24C is 34.7 V, measured at a peak pulse current (IPPM) of 45 A using the standardized 10/1000 µs double-exponential waveform defined in Fig.5 of the datasheet. This value represents the upper limit of voltage seen by downstream circuitry during worst-case surge events and is critical for verifying compatibility with protected ICs' absolute maximum ratings.
Does 1.5SMC24C require PCB baking before reflow soldering?
No, 1.5SMC24C has a moisture sensitivity level (MSL) of 1 per J-STD-020 - meaning it may be stored indefinitely at ambient conditions and placed directly onto the PCB without pre-baking. This eliminates process overhead and reduces risk of moisture-related popcorning during reflow, supporting high-yield automated assembly in industrial and automotive manufacturing lines.
How does the thermal resistance of 1.5SMC24C affect its surge handling capability?
With a junction-to-ambient thermal resistance (RθJA) of 50 °C/W and junction-to-case (RθJC) of 15 °C/W, the 1.5SMC24C can dissipate heat effectively during transient events when mounted on standard FR-4 PCBs with ≥1 cm² of 1 oz copper pour per pad. This thermal performance allows repeated 1500 W surges at 25 °C ambient, though derating per Fig.2 applies above 25 °C - ensuring reliable operation in enclosures up to +85 °C ambient.
1.5SMC24C 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):
- 19.4V
- Voltage - Breakdown (Min):
- 21.6V
- Voltage - Clamping (Max) @ Ipp:
- 34.7V
- Current - Peak Pulse (10/1000µs):
- 45A
- 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)
1.5SMC24C FAQ
1.How can I place an order for 1.5SMC24C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC24C 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 1.5SMC24C reliable?
The price and inventory of 1.5SMC24C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC24C is usually 5 days.
3.What payment methods are accepted for 1.5SMC24C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC24C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC24C?
1.5SMC24C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC24C 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 1.5SMC24C?
For technical support, including 1.5SMC24C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC24C requirements.
6.How does Aetrix verify that 1.5SMC24C is sourced from the original manufacturer or authorized distributors?
All 1.5SMC24C 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 1.5SMC24C meets industry standards.
7.What is the process for return or replacement of 1.5SMC24C?
All 1.5SMC24C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC24C, 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 1.5SMC24C part is unused and in its original packaging.
Return procedure for 1.5SMC24C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC24C Tags
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