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Taiwan Semiconductor Corporation SMCJ75C
- Part No.:
- SMCJ75C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ75C.pdf
- Description:
- 1500W, 92.7V, 10%, BIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:5,797
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Product details
Overview
SMCJ75C 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), 83.3–102V breakdown voltage (VBR), and 134V maximum clamping voltage (VC) at 11.7A peak pulse current - designed for automotive load-dump and inductive switching protection in power supply rails.
For engineers reviewing the SMCJ75C datasheet, SMCJ75C pinout, SMCJ75C application, or SMCJ75C equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, junction temperature limits (−55°C to +150°C), moisture sensitivity level (MSL 1), and compatibility with automated SMT placement on 12V/24V vehicle subsystems.
Technical Context
The SMCJ75C operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (83.3–102V @ IT = 1mA); it clamps transients to ≤134V within <1.0ps response time, dissipating up to 1500W peak pulse power (tp = 1ms) while maintaining <1μA leakage above 10V.
Thermal design is enabled by RθJA = 55°C/W and RθJC = 10°C/W, supporting operation up to TJ = 150°C; its glass-passivated junction and matte tin-plated leads meet J-STD-002 solderability and JESD 201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 83.3 V / 102 V @ IT = 1 mA - guaranteed avalanche initiation window for reliable turn-on margin |
| VC @ IPPM | 134 V @ 11.7 A - peak clamped voltage during 10/1000μs surge, limiting downstream IC stress |
| PPK | 1500 W - peak pulse power handling per single 1ms transient per Fig.5 waveform |
| IR @ VWM | <1 μA - negligible leakage current at rated stand-off, preserving low-power standby integrity |
| TJ max | +150 °C - maximum junction temperature enabling under-hood automotive deployment |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 0.210g mass and UL 94V-0 molding |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with cathode band marking; dual axial leads optimized for high-current SMT placement; polarity indicated by cathode band (cathode = marked end).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to system ground or lower-potential rail; defines conduction direction in unidirectional configuration |
| Cathode | Avalanche conduction terminal / Clamping output | Connected to protected line (e.g., 12V rail); conducts when reverse voltage exceeds VBR to clamp transients |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7637-2 compliance | Validated against Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect/load dump), and Pulse 3a/3b (switching noise) waveforms |
| Fast response time | <1.0 ps from 0 V to VBR min - ensures clamping activation before sensitive ICs experience overvoltage damage |
| Glass passivated junction | Enhanced reliability and stable VBR over temperature and lifetime vs. non-passivated alternatives |
| MSL Level 1 rating | Unlimited floor life at ≤30°C/60% RH - eliminates bake requirements prior to reflow assembly |
| Halogen-free construction | Complies with IEC 61249-2-21 - supports RoHS-compliant and environmentally regulated end equipment |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Suppressing load-dump transients (up to 120V, 400ms) on 12V/24V battery-fed ECUs in passenger vehicles and commercial trucks. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between power rail and chassis ground to shunt surge energy away from DC-DC converters and microcontrollers. Use Value: Limits clamped voltage to 134V, staying below 150V absolute maximum ratings of common automotive-grade regulators and CAN transceivers. | Use Scenario: Protecting 24V digital input modules in programmable logic controllers from inductive kickback generated by solenoid and relay coils. IC Role / Device Role / Timing Role: Standoff-clamp device connected across input terminals to absorb repetitive 600W–1000W spikes without degradation. Use Value: Withstands ≥1000 surges at rated IPPM (11.7A) per IEC 61000-4-5, ensuring long-term field reliability in factory automation environments. |
| LED Driver Overvoltage Clamp | Telecom DC Feeder Protection |
Use Scenario: Safeguarding constant-current LED drivers in streetlight systems against lightning-induced surges on 48V DC distribution lines. IC Role / Device Role / Timing Role: Primary clamping element parallel to driver input, activated within picoseconds to prevent MOSFET gate oxide rupture. Use Value: 134V VC ensures driver ICs with 150V input rating remain within safe operating area during 1kV/0.5Ω combo wave testing. | Use Scenario: Guarding PoE-powered remote radio units (RRUs) fed via −48V DC telecom plant against accidental AC cross-connects and induced surges. IC Role / Device Role / Timing Role: Bidirectional-capable variant (SMCJ75CA) used in back-to-back configuration; SMCJ75C serves as unidirectional backup in asymmetric designs. Use Value: 1500W PPK rating meets Telcordia GR-1089-CORE Level 3 surge immunity requirements for central office equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75A | Lower PPK (600W), smaller SMB package (DO-214AA), higher RθJA (75°C/W) | Not suitable for ISO 7637-2 Pulse 5a (load dump); limited to lower-energy transients | Select SMCJ75C where 1500W surge headroom and thermal robustness are required for automotive front-end protection. |
| 1.5KE75A | Through-hole TO-218 package, same VWM/VBR/VC specs, but slower response (~1ns) and no MSL 1 rating | Requires wave soldering or hand assembly; incompatible with high-volume SMT lines | Choose SMCJ75C for automated manufacturing, space-constrained PCBs, and extended temperature cycling reliability. |
Compared with SMBJ75A and 1.5KE75A, the SMCJ75C delivers superior surge energy handling in a moisture-insensitive, reflow-ready SMT package - making it the preferred choice for automotive and industrial systems demanding both high PPK and production scalability.
Availability
SMCJ75C is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC input stages, LED driver overvoltage clamping, and telecom DC feeder circuits requiring stable component supply across multi-year production cycles.
Supply support for SMCJ75C 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and power management devices since 1979.
The SMCJ series belongs to TSC's high-power transient suppression product line, engineered specifically for automotive, industrial, and telecom applications subject to ISO 7637-2, IEC 61000-4-5, and GR-1089-CORE surge standards.
FAQ
What is the polarity configuration of the SMCJ75C?
The SMCJ75C is a unidirectional TVS diode, with cathode indicated by a band on the DO-214AB (SMC) package body. It conducts only when the cathode is biased positively relative to the anode - making it suitable for DC rail protection where polarity is fixed. Unlike bidirectional variants (e.g., SMCJ75CA), the SMCJ75C does not conduct in forward bias beyond typical diode drop (~3.5V @ 100A), and its SMCJ75C clamping action occurs exclusively in reverse breakdown mode.
Does the SMCJ75C meet automotive qualification standards?
Yes, the SMCJ75C meets ISO 7637-2 test requirements for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnection and load dump), and Pulse 3a/3b (switching noise). While not AEC-Q200 certified as a standalone component, its electrical performance, thermal robustness (TJ = 150°C), MSL Level 1 rating, and glass-passivated junction align with automotive subsystem-level surge protection needs - and it is widely deployed in Tier-1 ECU designs using SMCJ75C for front-end rail clamping.
What is the maximum peak pulse current (IPPM) rating for the SMCJ75C?
The SMCJ75C has a maximum peak pulse current (IPPM) rating of 11.7 A under the standard 10/1000μs double-exponential waveform defined in Fig.5 of the datasheet. This value is derived from its 1500W peak pulse power rating and 134V clamping voltage (IPPM = PPK / VC = 1500W / 134V ≈ 11.2A), with the published 11.7A reflecting measurement tolerance and derating margins. The SMCJ75C maintains this rating at TA = 25°C and must be thermally de-rated per Fig.2 above that temperature.
Can the SMCJ75C replace the SMCJ75A in a design?
No - the SMCJ75C and SMCJ75A are not interchangeable without validation. The SMCJ75C has VBR = 83.3–102V, while the SMCJ75A has tighter VBR = 83.3–92.1V. This 10V spread in upper VBR affects clamping consistency and may alter system-level surge margin. Additionally, the SMCJ75C exhibits slightly higher VC (134V vs. 121V for SMCJ75A), increasing stress on downstream components. Use SMCJ75C only where its broader VBR range and higher clamping voltage are acceptable - always verify with actual surge testing on the target SMCJ75C layout.
Is the SMCJ75C halogen-free and RoHS compliant?
Yes, the SMCJ75C is fully RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound contains no brominated flame retardants (BFRs), no chlorine-based flame retardants (CFRs), and total bromine and chlorine content is below 900 ppm each. This compliance is confirmed in the "Mechanical Data" section of the Taiwan Semiconductor datasheet (Version S2104), and the SMCJ75C carries appropriate marking per JEDEC J-STD-609 for halogen-free status.
SMCJ75C 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):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 134V
- Current - Peak Pulse (10/1000µs):
- 11.7A
- 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)
SMCJ75C FAQ
1.How can I place an order for SMCJ75C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ75C 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 SMCJ75C reliable?
The price and inventory of SMCJ75C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ75C is usually 5 days.
3.What payment methods are accepted for SMCJ75C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ75C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ75C?
SMCJ75C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ75C 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 SMCJ75C?
For technical support, including SMCJ75C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ75C requirements.
6.How does Aetrix verify that SMCJ75C is sourced from the original manufacturer or authorized distributors?
All SMCJ75C 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 SMCJ75C meets industry standards.
7.What is the process for return or replacement of SMCJ75C?
All SMCJ75C units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ75C, 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 SMCJ75C part is unused and in its original packaging.
Return procedure for SMCJ75C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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