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Taiwan Semiconductor Corporation SMCJ75A
- Part No.:
- SMCJ75A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ75A.pdf
- Description:
- TVS DIODE 75VWM 121VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:14,996
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Product details
Overview
SMCJ75A from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 75V working stand-off voltage (VWM), 83.3–92.1V breakdown voltage (VBR), and 121V maximum clamping voltage (VC) at 13A peak pulse current - designed for automotive load-dump and inductive switching protection in power supply rails.
For engineers reviewing the SMCJ75A datasheet, SMCJ75A pinout, SMCJ75A application, or SMCJ75A equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, junction temperature derating above 25°C, moisture sensitivity level (MSL 1), and compatibility with automated SMT placement on high-reliability PCBs.
Technical Context
The SMCJ75A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified VBR range (83.3–92.1V @ IT = 1mA); it clamps transients to ≤121V at 13A (10/1000μs waveform), with <1.0ps response time from 0V to VBR min and typical IR <1μA at 75V.
Thermally, it features RθJA = 55°C/W and RθJC = 10°C/W, enabling operation up to TJ = +150°C; its DO-214AB package supports 200A non-repetitive forward surge (IFSM) and meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 83.3 / 92.1 V @ IT = 1 mA - Ensures reliable turn-on within defined tolerance band |
| VC @ IPPM | 121 V @ 13 A (10/1000μs) - Limits downstream voltage stress during surge events |
| PPK | 1500 W - Peak pulse power handling capability per single transient |
| IR @ VWM | <1 μA - Negligible leakage current at rated stand-off voltage |
| TJ max | +150 °C - Maximum junction temperature for sustained operation |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with cathode band marking |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band; weight ≈0.210g; MSL Level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side return path in unidirectional configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 75V rail); clamps to anode when overvoltage occurs |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability and stability of VBR under thermal cycling and humidity exposure |
| ISO 7637-2 compliance | Validated for automotive electrical disturbance immunity (Pulse 1/2a/2b/3a/3b) |
| Fast response time | <1.0 ps from 0 V to VBR min - enables suppression before sensitive ICs experience overstress |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU |
| Automated placement compatible | DO-214AB footprint and lead geometry optimized for pick-and-place machinery |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 75V battery-fed control modules against load dump and alternator transients in commercial vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 75V rail and chassis ground to clamp surges exceeding VWM. Use Value: Limits voltage excursion to ≤121V during 13A transients, preventing damage to microcontrollers and CAN transceivers. | Use Scenario: Safeguarding analog input channels of programmable logic controllers exposed to field-wiring inductive kickback. IC Role / Device Role / Timing Role: Standoff protection device on signal conditioning front-end, absorbing energy from relay coil de-energization. Use Value: Withstands 1500W peak pulses while maintaining sub-μA leakage at 75V nominal, preserving measurement accuracy. |
| LED Driver Overvoltage Clamp | Telecom DC Power Input Protection |
Use Scenario: Clamping voltage spikes on constant-current LED driver outputs subjected to hot-swap or cable disconnect events. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor across output terminals to limit voltage overshoot during fault conditions. Use Value: Fast <1.0ps response ensures clamping initiates before LED string or driver IC sustains avalanche failure. | Use Scenario: Front-end protection for 75V telecom rectifier modules receiving power from centralized DC distribution systems. IC Role / Device Role / Timing Role: Primary surge arrestor on DC input bus, coordinated with upstream fusing and downstream filtering. Use Value: 1500W PPK rating handles multiple repetitive surges per IEC 61000-4-5 Level 4 without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75A | Lower PPK (600W), same VWM/VBR/VC specs, SMB package (smaller footprint, higher RθJA) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a (load dump) | Select SMCJ75A when 1500W surge capacity and automotive-grade thermal robustness are required |
| 1.5KE75A | Through-hole DO-201 package, identical electrical specs but slower response (~1ns), higher IR at elevated temperature | Not suitable for high-density SMT designs; requires wave solder or hand assembly | Choose SMCJ75A for automated production, space-constrained boards, and faster clamping performance |
Compared with SMBJ75A and 1.5KE75A, the SMCJ75A delivers superior surge energy handling in a surface-mount format with verified sub-picosecond response-making it the preferred choice for automotive and industrial systems requiring both high-power clamping and SMT manufacturability.
Availability
SMCJ75A is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, LED lighting drivers, and telecom DC power systems requiring stable component supply and full compliance with AEC-Q200 stress test recommendations.
Supply support for SMCJ75A 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 Company (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for industrial and automotive markets.
The SMCJ series was developed specifically for high-energy transient suppression in harsh environments-emphasizing robust clamping, fast response, and reliability under repeated surge stress per ISO 7637-2 and IEC 61000-4-5 standards.
FAQ
What is the maximum clamping voltage of the SMCJ75A under standard test conditions?
The SMCJ75A has a maximum clamping voltage (VC) of 121 V when subjected to a 10/1000 μs peak pulse current of 13 A. This value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during transient events. The SMCJ75A maintains this clamping performance across its qualified operating temperature range, making it suitable for demanding applications such as automotive power rail protection where voltage excursions must remain tightly bounded.
Is the SMCJ75A unidirectional or bidirectional, and how is polarity identified?
The SMCJ75A is a unidirectional TVS diode, intended for use in DC circuits where reverse polarity protection is not required. Polarity is marked by a cathode band on the DO-214AB (SMC) package body - the banded end connects to the protected line (e.g., 75V rail), while the anode connects to ground. Bidirectional variants carry a "C" or "CA" suffix (e.g., SMCJ75CA), which the SMCJ75A does not have.
Does the SMCJ75A meet automotive transient immunity standards?
Yes, the SMCJ75A meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling), as confirmed in Taiwan Semiconductor's official documentation. Its 1500W peak power rating, fast <1.0ps response, and thermal design enable robust performance in automotive ECUs, body control modules, and infotainment power supplies where compliance with OEM-level EMC specifications is mandatory.
What is the moisture sensitivity level (MSL) and reflow profile guidance for SMCJ75A?
The SMCJ75A is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and may be subjected to standard Pb-free reflow profiles without baking. Its DO-214AB package uses moisture-resistant molding compound and matte tin-plated leads compliant with J-STD-002 solderability requirements - ensuring reliable wetting and joint integrity during automated SMT assembly without preconditioning.
How does the SMCJ75A compare to the SMCJ75 (non-A) variant?
The SMCJ75A offers tighter breakdown voltage tolerance (83.3–92.1 V) compared to the SMCJ75 (83.3–102 V), resulting in more predictable clamping onset and reduced risk of premature conduction. Both share identical VWM (75 V), VC (134 V vs. 121 V), and PPK (1500 W), but the "A" suffix denotes enhanced VBR consistency - critical for designs requiring precise overvoltage threshold control, such as regulated 75V power distribution networks.
SMCJ75A 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):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 12.4A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ75A FAQ
1.How can I place an order for SMCJ75A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ75A 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 SMCJ75A reliable?
The price and inventory of SMCJ75A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ75A is usually 5 days.
3.What payment methods are accepted for SMCJ75A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ75A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ75A?
SMCJ75A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ75A 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 SMCJ75A?
For technical support, including SMCJ75A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ75A requirements.
6.How does Aetrix verify that SMCJ75A is sourced from the original manufacturer or authorized distributors?
All SMCJ75A 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 SMCJ75A meets industry standards.
7.What is the process for return or replacement of SMCJ75A?
All SMCJ75A units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ75A, 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 SMCJ75A part is unused and in its original packaging.
Return procedure for SMCJ75A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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