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Taiwan Semiconductor Corporation SMCJ90A
- Part No.:
- SMCJ90A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ90A.pdf
- Description:
- TVS DIODE 90VWM 146VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
SMCJ90A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 1500W peak pulse power, 90V working stand-off voltage (VWM), and 146V maximum clamping voltage (VC) at 10.7A peak impulse current. It protects automotive power electronics and industrial control inputs against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ90A datasheet, SMCJ90A pinout, SMCJ90A application, or SMCJ90A equivalent, key selection criteria include clamping performance under 10/1000μs surge, unidirectional polarity marking, junction temperature range (–55°C to +150°C), and compliance with J-STD-020 moisture sensitivity level 1.
Technical Context
The SMCJ90A operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 100–111V breakdown range (VBR @ IT = 1mA). Its glass-passivated junction enables sub-1.0ps response time and <1μA leakage above 10V, supporting fast EFT/ESD immunity in 24V/48V DC systems.
Thermally, it features 10°C/W junction-to-case resistance and 55°C/W junction-to-ambient resistance, enabling 5W steady-state dissipation at 25°C ambient. The DO-214AB package supports automated placement and meets UL 94V-0 flammability and JESD 201 Class 2 whisker resistance standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 100 / 111 V @ 1 mA - Ensures reliable turn-on margin above system nominal voltage |
| VC @ IPPM | 146 V @ 10.7 A - Limits downstream voltage stress during 10/1000μs transients |
| PPK | 1500 W - Handles high-energy surges per ISO 7637-2 without failure |
| IR @ VWM | <1 μA - Negligible leakage in standby, preserving low-power system integrity |
| TJ max | +150 °C - Supports operation in under-hood automotive and industrial environments |
| Package | DO-214AB (SMC) - Surface-mount footprint compatible with standard SMT reflow profiles |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads; cathode indicated by band on one end; polarity-critical for unidirectional operation; weight ≈ 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side return path in unidirectional protection |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 24V rail); clamps to anode when transient exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable breakdown voltage and <1.0 ps response time for ESD/EFT immunity |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (EFT) |
| J-STD-020 Level 1 moisture sensitivity | Allows unlimited floor life and standard SMT handling without baking |
| UL 94V-0 molding compound | Meets flame-retardancy requirements for automotive and industrial enclosures |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and environmental directives for global supply chains |
Applications
| Automotive Power Distribution | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 24V supply lines in body control modules from load-dump transients (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24V rail and chassis ground to clamp surges up to 1500W. Use Value: Limits clamped voltage to ≤146V, preventing damage to downstream DC-DC converters and microcontrollers. | Use Scenario: Safeguarding digital input channels of programmable logic controllers exposed to inductive switching noise. IC Role / Device Role / Timing Role: Standoff-rated TVS on 24V sensor input lines, absorbing repetitive 10/1000μs transients. Use Value: Maintains signal integrity with <1μA leakage at 90V, avoiding false triggering in high-impedance sensing circuits. |
| LED Driver Overvoltage Protection | Telecom Power Interface |
Use Scenario: Shielding constant-current LED drivers from voltage spikes caused by hot-plug events or cable discharge. IC Role / Device Role / Timing Role: Unidirectional clamping device on driver output, referenced to system ground. Use Value: Fast 100–111V breakdown ensures activation before LED string overvoltage exceeds safe limits. | Use Scenario: Front-end protection for 48V telecom power interfaces subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary TVS stage on DC input, coordinated with secondary MOV/GDT stages. Use Value: 1500W peak power rating enables robust first-line defense without thermal runaway under repeated surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A | 600W PPK rating, same VWM/VBR/VC specs, SMB package (smaller footprint, lower thermal mass) | Lower surge energy handling; suitable for space-constrained consumer electronics, not automotive load-dump | Select SMCJ90A when 1500W surge capability and automotive-grade thermal robustness are required. |
| 1.5SMC90A | Identical electrical specs and DO-214AB package; manufactured by ON Semiconductor | No functional or mechanical difference; qualified for same ISO 7637-2 pulses and JEDEC standards | Direct second-source option with identical pinout, footprint, and performance-no redesign needed. |
Compared with SMBJ90A, SMCJ90A delivers 2.5× higher surge energy absorption and superior thermal stability for under-hood use; versus 1.5SMC90A, it offers identical protection performance with alternate supply chain assurance.
Availability
SMCJ90A is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC input protection, LED driver overvoltage protection, and telecom power interface applications requiring stable component supply across production lifecycles.
Supply support for SMCJ90A 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.
The SMCJ series was designed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing ISO 7637-2 compliance, robust thermal performance, and automated assembly compatibility.
FAQ
What is the clamping voltage of SMCJ90A at its rated peak pulse current?
The SMCJ90A has a maximum clamping voltage (VC) of 146 V at 10.7 A peak impulse current (IPPM), measured under the standardized 10/1000 μs double-exponential surge waveform. This value ensures protected circuits remain below critical overvoltage thresholds during transient events, and is verified per ANSI/IEEE C62.35 test conditions.
Is SMCJ90A unidirectional or bidirectional, and how is polarity marked?
SMCJ90A is a unidirectional TVS diode, with polarity indicated by a cathode band on the DO-214AB package body. The cathode must be connected to the line being protected (e.g., 24V rail), and the anode to ground. Bidirectional variants use the "C" or "CA" suffix (e.g., SMCJ90CA), which are electrically distinct and not interchangeable with SMCJ90A.
Does SMCJ90A meet automotive transient immunity standards?
Yes, SMCJ90A meets ISO 7637-2 requirements for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (electrical fast transients), as confirmed in Taiwan Semiconductor's official documentation. Its 1500W peak power rating and fast sub-1.0ps response enable compliant protection in 12V/24V vehicle networks.
What is the maximum steady-state power dissipation for SMCJ90A?
The SMCJ90A has a steady-state power dissipation (PD) rating of 5 W at TA = 25°C, derating linearly above that ambient temperature per the published thermal derating curve. This rating applies only to continuous DC or low-frequency reverse bias conditions-not to transient surge events, where the 1500W PPK rating governs.
Can SMCJ90A be used in place of SMCJ90 without design changes?
No-SMCJ90A and SMCJ90 differ in breakdown voltage tolerance: SMCJ90A has VBR = 100–111 V, while SMCJ90 has VBR = 100–122 V. The tighter VBR range of SMCJ90A improves clamping consistency but may affect margin in systems relying on the wider original spec. System validation is required before substitution.
SMCJ90A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 90V
- Voltage - Breakdown (Min):
- 100V
- Voltage - Clamping (Max) @ Ipp:
- 146V
- Current - Peak Pulse (10/1000µs):
- 10.3A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ90A FAQ
1.How can I place an order for SMCJ90A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ90A 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 SMCJ90A reliable?
The price and inventory of SMCJ90A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ90A is usually 5 days.
3.What payment methods are accepted for SMCJ90A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ90A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ90A?
SMCJ90A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ90A 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 SMCJ90A?
For technical support, including SMCJ90A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ90A requirements.
6.How does Aetrix verify that SMCJ90A is sourced from the original manufacturer or authorized distributors?
All SMCJ90A 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 SMCJ90A meets industry standards.
7.What is the process for return or replacement of SMCJ90A?
All SMCJ90A units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ90A, 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 SMCJ90A part is unused and in its original packaging.
Return procedure for SMCJ90A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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