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Taiwan Semiconductor Corporation SMCJ7.5
- Part No.:
- SMCJ7.5
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.5.pdf
- Description:
- 1500W, 9.3V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,900
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Product details
Overview
SMCJ7.5 from Taiwan Semiconductor is a unidirectional 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 automotive load-dump and inductive switching protection in power supply rails.
For engineers reviewing the SMCJ7.5 datasheet, SMCJ7.5 pinout, SMCJ7.5 application, or SMCJ7.5 equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, junction temperature derating above 25°C, unidirectional polarity marking, and compatibility with automated SMT placement on high-reliability PCBs.
Technical Context
The SMCJ7.5 operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (8.33–10.30V @ 1mA). It clamps transients to ≤14.3V at 100A (10/1000μs waveform), limiting energy dissipation via its 1500W peak pulse rating and 10°C/W junction-to-case thermal resistance.
Its glass-passivated junction ensures stable leakage (<1μA @ 7.5V), while meeting J-STD-020 Level 1 moisture sensitivity and UL 94V-0 flammability. Polarity is marked by cathode band; it is not rated for bidirectional use unless specified with "C" or "CA" suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping begins; sets minimum system rail margin. |
| VBR min/max | 8.33 V / 10.30 V @ 1 mA - Confirmed avalanche initiation window; ensures reliable turn-on across process variation. |
| VC @ IPPM | 14.3 V @ 100 A - Clamped voltage during 10/1000μs surge; defines worst-case overvoltage seen by downstream ICs. |
| PPK | 1500 W - Peak pulse power handling per single 1ms event; supports ISO 7637-2 Pulse 5a (load dump). |
| IR @ VWM | <1 μA - Reverse leakage at rated stand-off; negligible power loss and signal integrity impact in standby. |
| RθJC | 10 °C/W - Junction-to-case thermal resistance; enables thermal design with heatsink or copper pour for repeated surges. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, cathode indicated by molded band. Weight: 0.210 g. Complies with JESD 201 Class 2 whisker resistance and RoHS/halogen-free requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side return path; conducts during forward surge (e.g., ESD contact discharge). |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12V rail); avalanches into conduction when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| Clamping response <1.0 ps | Enables protection of fast-edge digital interfaces (e.g., CAN, LIN) against sub-nanosecond EFT bursts. |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive flyback), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (switching noise). |
| Automated placement compatible | DO-214AB footprint and lead coplanarity meet IPC-7351B standards for high-yield SMT assembly. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and bulk capacitor to clamp surges before LDOs or microcontrollers. Use Value: Limits rail overvoltage to ≤14.3V during 100A transients, preventing latch-up or gate oxide damage in downstream logic. |
Use Scenario: 24V industrial analog sensor outputs (e.g., 4–20mA loop) subject to cable-induced EFT. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt fast transients before signal conditioning amplifiers. Use Value: Sub-1ns response and <1μA leakage preserve signal accuracy while surviving 4kV EFT bursts per IEC 61000-4-4. |
| LED Driver Input Protection | DC-DC Converter Input Stage |
Use Scenario: Constant-current LED drivers powered from vehicle battery with frequent ignition cycling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on HV input rail upstream of buck controller and MOSFET switch. Use Value: Absorbs 1500W peak energy without degradation, maintaining driver uptime during cold-crank voltage spikes. |
Use Scenario: Automotive-grade DC-DC converters converting 12V to 3.3V/5V for infotainment SoCs. IC Role / Device Role / Timing Role: First-line transient suppressor before input filter and synchronous rectifier stage. Use Value: Clamps to 14.3V while delivering 100A surge current, protecting high-side FET gate drivers from overvoltage stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5 | Lower PPK (600W), same VWM/VBR/VC specs, SMB package (smaller footprint, higher RθJA = 85°C/W). | Suitable only for lower-energy transients (e.g., IEC 61000-4-2 ESD), not ISO 7637-2 load dump. | Select SMCJ7.5 when 1500W surge capability and thermal robustness are required; SMBJ7.5 fits space-constrained layouts with reduced surge severity. |
| SMCJ7.5A | Tighter VBR tolerance (8.33–9.21V vs. 8.33–10.30V), identical VWM, VC = 12.9V @ 100A (lower clamping). | Better for systems requiring tighter voltage margin below 13V, e.g., 12V logic with narrow VDD tolerance. | Choose SMCJ7.5A if clamping voltage headroom is critical; SMCJ7.5 offers broader process margin for cost-sensitive production. |
Compared with SMBJ7.5 and SMCJ7.5A, the SMCJ7.5 provides the widest VBR range and highest surge energy absorption in DO-214AB, making it optimal for automotive front-end protection where both robustness and manufacturability are prioritized.
Availability
SMCJ7.5 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor modules, LED lighting drivers, and DC-DC converter designs requiring stable component supply and full ISO 7637-2 compliance.
Supply support for SMCJ7.5 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 for automotive and industrial markets.
The SMCJ series was developed specifically for high-energy transient suppression in harsh automotive environments, emphasizing rugged packaging, repeatable clamping, and AEC-Q101 alignment.
FAQ
What is the maximum clamping voltage of the SMCJ7.5 under standard test conditions?
The SMCJ7.5 has a maximum clamping voltage (VC) of 14.3 V when subjected to a 100 A peak pulse current with a 10/1000 μs waveform. This value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ7.5 maintains this clamping performance consistently due to its glass-passivated junction and DO-214AB thermal design.
Is the SMCJ7.5 suitable for bidirectional transient protection?
No, the SMCJ7.5 is a unidirectional TVS diode and is not rated for bidirectional operation. Its cathode band marking indicates polarity-sensitive installation. For bidirectional protection, select the SMCJ7.5C or SMCJ7.5CA variant, which features symmetrical breakdown in both directions and omits the cathode band. Using SMCJ7.5 in reverse-biased AC applications may result in premature failure or undefined clamping behavior.
Does the SMCJ7.5 meet automotive qualification standards such as AEC-Q101?
The SMCJ7.5 is engineered to meet key automotive stress requirements including ISO 7637-2 Pulse 1/2a/2b/3a/3b and is built on TSC's AEC-Q101-qualified platform. While the datasheet does not list formal AEC-Q101 certification for this specific revision, its construction - glass passivation, J-STD-020 Level 1 moisture sensitivity, and 150°C TJ max - aligns with AEC-Q101 test profiles. Customers requiring certified documentation should request TSC's latest qualification report for SMCJ7.5.
What is the reverse leakage current specification for the SMCJ7.5 at its working voltage?
The SMCJ7.5 exhibits a maximum reverse leakage current (IR) of less than 1 μA when biased at its 7.5 V working stand-off voltage (VWM) and tested at TA = 25°C. This ultra-low leakage ensures minimal power loss in always-on systems and avoids interference with high-impedance sensing nodes. The IR remains well below 1 μA even at elevated temperatures up to 85°C, supporting reliable operation in under-hood environments.
Can the SMCJ7.5 be used in automated SMT assembly lines without reflow concerns?
Yes, the SMCJ7.5 is explicitly designed for automated placement and reflow soldering. Its DO-214AB (SMC) package meets IPC-7351B footprint standards, features matte tin-plated leads compliant with J-STD-002, and carries J-STD-020 Level 1 moisture sensitivity - meaning it can be stored indefinitely at ambient conditions without baking. The 0.210 g weight and symmetric lead geometry ensure high placement yield and consistent solder joint formation in high-volume manufacturing.
SMCJ7.5 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCJ7.5 FAQ
1.How can I place an order for SMCJ7.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.5 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 SMCJ7.5 reliable?
The price and inventory of SMCJ7.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ7.5 is usually 5 days.
3.What payment methods are accepted for SMCJ7.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.5?
SMCJ7.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.5 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 SMCJ7.5?
For technical support, including SMCJ7.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.5 requirements.
6.How does Aetrix verify that SMCJ7.5 is sourced from the original manufacturer or authorized distributors?
All SMCJ7.5 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 SMCJ7.5 meets industry standards.
7.What is the process for return or replacement of SMCJ7.5?
All SMCJ7.5 units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.5, 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 SMCJ7.5 part is unused and in its original packaging.
Return procedure for SMCJ7.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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