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Taiwan Semiconductor Corporation SMCJ7.5C
- Part No.:
- SMCJ7.5C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.5C.pdf
- Description:
- 1500W, 9.3V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:5,972
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Product details
Overview
SMCJ7.5C from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 7.5V working stand-off voltage (VWM), 8.33–10.30V breakdown voltage (VBR), and 14.3V maximum clamping voltage (VC) at 100A peak pulse current - designed for ESD and lightning surge protection in automotive power line interfaces.
For engineers reviewing the SMCJ7.5C datasheet, SMCJ7.5C pinout, SMCJ7.5C application, or SMCJ7.5C equivalent, this device is selected for high-energy transient suppression where fast response (<1.0ps), low leakage (<1μA @ 7.5V), and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance are required in compact SMC-packaged designs.
Technical Context
The SMCJ7.5C is a bipolar TVS diode configured as a single-die, symmetrical junction for bidirectional clamping - enabling protection of AC-coupled or floating signal/power lines without polarity sensitivity. Its glass-passivated chip junction ensures stable VBR tolerance and long-term reliability under repetitive surge stress.
Thermal performance is defined by RθJA = 55°C/W and RθJC = 10°C/W, supporting operation up to TJ = +150°C. It meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity - suitable for lead-free reflow without preconditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping begins; sets minimum system operating margin. |
| VBR min/max | 8.33 V / 10.30 V @ IT = 1 mA - Confirmed breakdown range ensures predictable turn-on across production lots. |
| VC @ IPPM | 14.3 V @ 100 A - Clamping voltage during 10/1000 μs surge defines worst-case overvoltage seen by protected ICs. |
| PPK | 1500 W - Peak pulse power rating per 1 ms non-repetitive waveform (Fig.5); determines single-event energy handling. |
| IR @ VWM | <1 μA - Ultra-low reverse leakage preserves signal integrity and battery life in always-on circuits. |
| TJ max | +150 °C - Maximum junction temperature enables use in under-hood automotive or industrial power modules. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, molded plastic case with matte tin-plated leads; polarity indicated by cathode band (not applicable for bidirectional SMCJ7.5C - symmetrical terminals).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional clamping node | Either terminal serves as input/output for transient energy diversion; no polarity-dependent mounting required. |
| Cathode band (absent) | N/A - Bidirectional marking | No polarity marking on SMCJ7.5C; device functions identically regardless of orientation in PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (switching transients) - critical for automotive ECUs. |
| Clamping response time | <1.0 ps from 0 V to VBR min - faster than most silicon diodes, minimizing voltage overshoot during nanosecond-scale ESD events. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive - supports green manufacturing and end-of-life recycling requirements. |
| Moisture sensitivity | Level 1 per J-STD-020 - zero floor life limitation; can be mounted directly from reel without baking. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12 V battery-fed control module exposed to load dump and alternator ripple. IC Role / Device Role: Primary overvoltage clamp placed upstream of LDOs and microcontrollers. Use Value: Limits transients to ≤14.3 V during 100 A surges, preventing latch-up or gate oxide damage in downstream ICs. |
Use Scenario: 4–20 mA current loop transmitter connected to field wiring subject to EFT bursts. IC Role / Device Role: Bidirectional shunt protector across analog input pins of precision ADCs or op-amps. Use Value: Symmetrical clamping maintains signal fidelity during ±1 kV EFT (IEC 61000-4-4) without polarity constraints. |
| LED Driver Surge Suppression | USB Port ESD Protection |
Use Scenario: Constant-current LED driver board powered from unregulated DC supply in outdoor signage. IC Role / Device Role: Parallel-connected TVS across input capacitor to absorb lightning-induced surges. Use Value: 1500 W peak power rating handles 10/1000 μs surges up to 100 A while maintaining VWM = 7.5 V for compatibility with 9 V nominal input. |
Use Scenario: USB 2.0 data lines routed near external connectors in portable medical devices. IC Role / Device Role: Low-capacitance bidirectional clamp on D+/D− lines to meet IEC 61000-4-2 ±8 kV contact discharge. Use Value: Sub-1 μA leakage avoids bus pull-up interference; fast response prevents data corruption during ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5CA | Lower PPK = 600 W; same VWM/VBR/VC but smaller SMB package (DO-214AA); RθJA = 85°C/W. | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 1 or high-current load dump. | Select when space-constrained layouts prioritize footprint over 1500 W surge capacity. |
| 1.5KE7.5C | Through-hole TO-218 package; same VWM/VBR/VC; PPK = 1500 W; slower response (~1 ns) due to lead inductance. | Requires PCB through-holes; less suitable for automated SMT assembly or high-frequency surge environments. | Choose only if legacy through-hole design or thermal mass requirements outweigh SMT advantages. |
Compared with SMBJ7.5CA and 1.5KE7.5C, the SMCJ7.5C delivers identical clamping performance in a surface-mount DO-214AB package optimized for high-energy automotive transients, automated placement, and superior thermal dissipation (RθJA = 55°C/W).
Availability
SMCJ7.5C is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, LED lighting drivers, and USB interface protection requiring stable component supply and full ISO 7637-2 compliance.
Supply support for SMCJ7.5C 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs since 1979.
The SMCJ series was developed specifically for high-reliability transient suppression in automotive and industrial environments - emphasizing robustness against ISO 7637-2 pulses, tight VBR tolerances, and SMT manufacturability.
FAQ
What is the clamping voltage of SMCJ7.5C at its rated peak pulse current?
The SMCJ7.5C has a maximum clamping voltage (VC) of 14.3 V at 100 A peak pulse current (IPPM), measured under the standard 10/1000 μs waveform per Fig.5. This value defines the upper voltage limit imposed on protected circuitry during a full-rated surge event and is confirmed in the Electrical Specifications table on page 2 of the S2104 datasheet.
Is SMCJ7.5C unidirectional or bidirectional, and how is polarity marked?
The SMCJ7.5C is a bidirectional TVS diode - indicated by the "C" suffix per TSC's naming convention - and features symmetrical clamping in both directions. Unlike unidirectional variants (e.g., SMCJ7.5A), it has no cathode band marking and may be mounted in either orientation on the PCB without functional impact.
Does SMCJ7.5C meet automotive transient immunity standards?
Yes, the SMCJ7.5C meets ISO 7637-2 requirements for Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnection), and Pulse 3a/3b (switching noise), as explicitly stated in the FEATURES section of the S2104 datasheet - making it suitable for engine control units, body controllers, and other 12 V automotive modules.
What is the maximum junction temperature and thermal resistance of SMCJ7.5C?
The SMCJ7.5C has a maximum junction temperature (TJ) of +150°C and thermal resistances of RθJA = 55°C/W (junction-to-ambient) and RθJC = 10°C/W (junction-to-case), per the THERMAL PERFORMANCE table. These values enable reliable operation in high-temperature under-hood environments when mounted on adequately sized copper pads.
How does SMCJ7.5C differ from SMCJ7.5A in terms of electrical behavior?
The SMCJ7.5C is bidirectional with symmetrical VBR and VC in both polarities, while the SMCJ7.5A is unidirectional - conducting only in reverse bias and requiring correct cathode orientation. Their VBR (8.33–10.30 V), VWM (7.5 V), and VC (12.9 V @ 100 A) differ slightly due to internal structure; the "C" variant is used where polarity-agnostic protection is needed.
SMCJ7.5C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMCJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 14.3V
- Current - Peak Pulse (10/1000µs):
- 110A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ7.5C FAQ
1.How can I place an order for SMCJ7.5C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.5C 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 SMCJ7.5C reliable?
The price and inventory of SMCJ7.5C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ7.5C is usually 5 days.
3.What payment methods are accepted for SMCJ7.5C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.5C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.5C?
SMCJ7.5C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.5C 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 SMCJ7.5C?
For technical support, including SMCJ7.5C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.5C requirements.
6.How does Aetrix verify that SMCJ7.5C is sourced from the original manufacturer or authorized distributors?
All SMCJ7.5C 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 SMCJ7.5C meets industry standards.
7.What is the process for return or replacement of SMCJ7.5C?
All SMCJ7.5C units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.5C, 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 SMCJ7.5C part is unused and in its original packaging.
Return procedure for SMCJ7.5C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.5C Tags
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