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Taiwan Semiconductor Corporation 1.5SMC68CA
- Part No.:
- 1.5SMC68CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC68CA.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
1.5SMC68CA from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode with a nominal breakdown voltage of 64.6–71.4 V, clamping voltage of 92.0 V at 17 A peak pulse current, and DO-214AB (SMC) package. It protects power rails and signal lines in telecom interfaces, industrial I/O modules, and automotive body electronics against ESD, lightning-induced surges, and load-switch transients.
For engineers reviewing the 1.5SMC68CA datasheet, 1.5SMC68CA pinout, 1.5SMC68CA application, or 1.5SMC68CA equivalent, this page delivers verified electrical specs, thermal performance data, bidirectional clamping behavior, JEDEC-compliant SMC package dimensions, and real-world surge immunity per ISO 7637-2 Pulse 1/2a/2b/3a/3b.
Technical Context
The 1.5SMC68CA employs a glass-passivated silicon junction optimized for fast transient response (<1.0 ps) and low leakage (<1 µA at 58.1 V). Its bidirectional configuration enables symmetrical clamping in AC-coupled or floating circuits without polarity constraints.
Rated for 1500 W peak pulse power (10/1000 µs waveform), it sustains 17 A peak impulse current with 92.0 V clamping voltage and exhibits a temperature coefficient of VBR of 0.104 %/°C - critical for stable overvoltage protection across -55°C to +150°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V - ensures reliable conduction onset above 58.1 V working stand-off voltage, preventing false triggering during normal operation |
| VC @ IPPM | 92.0 V at 17 A - limits downstream voltage stress to safe levels during 10/1000 µs transients in 12–48 V systems |
| PPK | 1500 W - handles high-energy surges such as ISO 7637-2 Pulse 1 (inductive load dump) without failure |
| IR @ VWM | <1 µA at 58.1 V - minimizes standby power loss and avoids interference in high-impedance sensing circuits |
| TJ max | +150 °C - supports operation in under-hood automotive or enclosed industrial enclosures without derating |
| RθJA | 50 °C/W - defines thermal rise under sustained surge conditions; requires ≥25 mm² copper pour for full 1500 W rating |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional, cathode band not applicable (symmetrical terminals).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Either terminal accepts surge current in either direction; no polarity marking required for bidirectional use |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC lines, differential buses (e.g., RS-485), and floating grounds without external diode pairing |
| ISO 7637-2 compliance | Validated for automotive load-dump (Pulse 2b), supply transients (Pulse 3a/3b), and ESD coupling (Pulse 1), reducing qualification testing effort |
| Moisture sensitivity level 1 | Eliminates bake requirements before reflow; compatible with standard J-STD-020 assembly processes |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained applications |
| Fast response time | <1.0 ps junction response ensures clamping activation before sensitive ICs experience overstress in ESD events (IEC 61000-4-2) |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting 24 V DC digital input channels in programmable logic controllers from field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed between input terminal and ground, shunting transients before they reach optocoupler or MCU GPIO. Use Value: Withstands repeated 1 kV/500 A 10/1000 µs surges per IEC 61000-4-5 Level 3, extending system uptime and reducing field failures. |
Use Scenario: Safeguarding LIN bus transceivers and door module microcontrollers against battery line transients during jump-start or alternator load dump. IC Role / Device Role / Timing Role: Bidirectional TVS connected across LIN bus (LIN-H/L) and chassis ground, suppressing both positive and negative polarity spikes. Use Value: Meets ISO 7637-2 Pulse 2b (load dump) and Pulse 3b (capacitive coupling), enabling single-device compliance without external circuitry. |
| Telecom DSL Line Interface | Medical Diagnostic Equipment Power Input |
Use Scenario: Shielding ADSL/VDSL line drivers and transformers from lightning-induced common-mode surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Placed across line pair (tip/ring) in series with gas discharge tube (GDT), acting as secondary fast-clamp after GDT ionization. Use Value: Clamps residual voltage to ≤92 V within <1 ps, preventing damage to line driver ICs rated for 100 V absolute maximum. |
Use Scenario: Securing 48 V DC auxiliary power inputs in portable ultrasound or patient monitor systems against hospital-grade power disturbances. IC Role / Device Role / Timing Role: Mounted at board edge between input connector and DC-DC converter, absorbing EN 61000-4-4 EFT bursts and conducted RF noise. Use Value: Maintains <1 µA leakage at 58.1 V, avoiding interference with precision analog front-ends while delivering 1500 W surge capacity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64CA (Bourns) | 600 W rating, SMB package (smaller footprint), VC = 104 V @ 9.2 A | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 1 or high-current load dump | Select when space-constrained and surge energy ≤600 W; verify layout thermal relief for SMB pad size |
| SMCJ64CA (Littelfuse) | 1500 W rating, identical DO-214AB package, VC = 103 V @ 14.5 A (higher clamping) | Higher clamping voltage reduces margin for 64 V-rated downstream components | Use where higher VC is acceptable and second-source availability is prioritized over lowest clamping |
Compared with SMBJ64CA and SMCJ64CA, the 1.5SMC68CA offers superior clamping performance (92.0 V vs. ≥103 V) and identical 1500 W surge capability in the industry-standard SMC package - making it optimal for designs requiring tight voltage limiting in automotive and industrial 24–48 V systems.
Availability
1.5SMC68CA is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, telecom line interface cards, and medical auxiliary power supplies requiring stable component supply and long-term lifecycle support.
Supply support for 1.5SMC68CA 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 certification.
The 1.5SMCxxCA series was designed specifically for high-reliability transient suppression in automotive, industrial, and telecom infrastructure - emphasizing robustness, JEDEC-compliant packaging, and standardized surge test compliance.
FAQ
What is the clamping voltage of the 1.5SMC68CA and how is it measured?
The 1.5SMC68CA has a maximum clamping voltage (VC) of 92.0 V at 17 A peak pulse current (IPPM), tested using the standard 10/1000 µs double-exponential waveform per IEC 61000-4-5. This value represents the upper limit of voltage seen by protected circuitry during worst-case surge events, ensuring downstream components remain within safe operating limits.
Is the 1.5SMC68CA unidirectional or bidirectional, and how does that affect PCB layout?
The 1.5SMC68CA is a bidirectional TVS diode - its terminals are electrically symmetrical, with no anode/cathode distinction. This eliminates polarity concerns during placement, allowing direct integration across AC-coupled lines (e.g., RS-485, LIN bus) or floating grounds without orientation checks or silkscreen markings.
Does the 1.5SMC68CA meet automotive surge standards like ISO 7637-2?
Yes, the 1.5SMC68CA meets ISO 7637-2 requirements for Pulses 1 (inductive switch-off), 2a/2b (load dump), and 3a/3b (capacitive coupling), validated per manufacturer test reports. Its 1500 W rating and 92.0 V clamping enable compliance in 12 V and 24 V vehicle networks without additional series impedance.
What is the maximum operating temperature and thermal resistance of the 1.5SMC68CA?
The 1.5SMC68CA has a maximum junction temperature (TJ) of +150 °C and a junction-to-ambient thermal resistance (RθJA) of 50 °C/W. To sustain full 1500 W surge capability, the PCB must provide ≥25 mm² of 2-oz copper connected to both terminals, per JEDEC JESD51-7 guidelines.
How does the 1.5SMC68CA differ from the unidirectional 1.5SMC68C variant?
The 1.5SMC68CA is bidirectional with symmetrical clamping in both polarities, while the 1.5SMC68C is unidirectional and requires correct anode/cathode orientation. The CA version supports AC and floating applications; the C version suits DC rail-to-ground protection only. Their VBR, VC, and PPK ratings are otherwise identical.
1.5SMC68CA 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):
- 58.1V
- Voltage - Breakdown (Min):
- 64.6V
- Voltage - Clamping (Max) @ Ipp:
- 92V
- Current - Peak Pulse (10/1000µs):
- 17A
- 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)
1.5SMC68CA FAQ
1.How can I place an order for 1.5SMC68CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC68CA 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 1.5SMC68CA reliable?
The price and inventory of 1.5SMC68CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC68CA is usually 5 days.
3.What payment methods are accepted for 1.5SMC68CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC68CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC68CA?
1.5SMC68CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC68CA 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 1.5SMC68CA?
For technical support, including 1.5SMC68CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC68CA requirements.
6.How does Aetrix verify that 1.5SMC68CA is sourced from the original manufacturer or authorized distributors?
All 1.5SMC68CA 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 1.5SMC68CA meets industry standards.
7.What is the process for return or replacement of 1.5SMC68CA?
All 1.5SMC68CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC68CA, 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 1.5SMC68CA part is unused and in its original packaging.
Return procedure for 1.5SMC68CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC68CA Tags
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