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Taiwan Semiconductor Corporation SMCJ90CAH
- Part No.:
- SMCJ90CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ90CAH.pdf
- Description:
- TVS DIODE 90VWM 146VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,207
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Product details
Overview
SMCJ90CAH from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 90V working stand-off voltage (VWM), 100–111V breakdown voltage (VBR), and 146V maximum clamping voltage (VC) at 10.7A peak impulse current - designed to protect automotive power rails and industrial I/O interfaces against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ90CAH datasheet, SMCJ90CAH pinout, SMCJ90CAH application, or SMCJ90CAH equivalent, this device delivers AEC-Q101 qualification, sub-1ps response time, <1µA reverse leakage above 10V, glass-passivated junction, and bidirectional ESD/transient immunity for robust front-end protection in harsh environments.
Technical Context
The SMCJ90CAH operates as a bidirectional avalanche diode, symmetrically clamping voltage surges in both polarities without requiring external polarity management. Its breakdown threshold is specified at 100–111V (IT = 1mA), with clamping occurring at ≤146V under 10.7A 10/1000µs waveform per IEC 61000-4-5 and ISO 7637-2.
Thermally rated for TJ = –55°C to +150°C, it features RθJA = 55°C/W and RθJC = 10°C/W, enabling reliable operation in high-temperature automotive under-hood or industrial control cabinet deployments. The DO-214AB package supports automated placement and meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC/AC rail margin for 12V/24V/48V systems. |
| VBR (min/max) | 100 / 111 V @ 1 mA - Confirmed avalanche onset range; ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 146 V @ 10.7 A - Clamped voltage during standardized 10/1000µs surge; determines protected circuit's maximum stress level. |
| PPK | 1500 W - Peak pulse power handling per single non-repetitive event; supports high-energy load-dump and lightning-induced transients. |
| IR @ VWM | <1 µA - Ultra-low leakage at rated stand-off; avoids signal integrity degradation or battery drain in always-on circuits. |
| TJ max | +150 °C - Junction temperature limit enabling use in engine control units, motor drives, and industrial PLCs without derating. |
Pinout & Package
DO-214AB (SMC) surface-mount package: molded epoxy case with matte tin-plated leads, polarity indicated by cathode band (bidirectional symmetry means no functional polarity marking required for SMCJ90CAH).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Band End) | Anode/Cathode terminal (bidirectional) | Identical electrical behavior in both directions; no functional distinction - used for mechanical orientation only. |
| Anode (Opposite End) | Anode/Cathode terminal (bidirectional) | Electrically interchangeable with cathode end; enables layout flexibility and eliminates polarity-sensitive routing. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for powertrain and chassis modules. |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) - covers full vehicle-level EMC requirements. |
| Glass-passivated junction | Enhances long-term stability and moisture resistance vs. silicon nitride alternatives - critical for high-humidity under-hood environments. |
| Sub-1 ps response time | Clamps within <1 picosecond from 0 V to VBR min - faster than most microcontroller I/O protection strategies, preserving signal integrity. |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive - supports green manufacturing and export compliance for global OEMs. |
Applications
| Automotive Power Distribution | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting 24V supply lines feeding body control modules (BCM), lighting drivers, and HVAC actuators from load-dump transients up to 120V. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converters and LDO regulators. Use Value: Limits transient voltage to ≤146V, preventing damage to downstream 36V-rated input stages and ensuring system-level ISO 7637-2 compliance. |
Use Scenario: Shielding RS-485/RS-232 transceivers and PLC digital inputs from ESD events and inductive kickback in factory automation equipment. IC Role / Device Role / Timing Role: Bidirectional interface-level TVS placed directly at connector entry points. Use Value: Absorbs ±15kV contact ESD (IEC 61000-4-2) and 1kV line-to-ground surges without latch-up or parameter shift. |
| Telecom Power Feeds | Renewable Energy Monitoring |
Use Scenario: Safeguarding PoE-powered devices (e.g., IP cameras, wireless APs) connected to 48V DC distribution infrastructure exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Secondary surge suppression stage after primary gas discharge tube (GDT) or MOV. Use Value: Provides low-clamping secondary protection with fast response, reducing let-through energy to <100mJ for sensitive PHY ICs. |
Use Scenario: Protecting voltage/current sensing inputs on solar inverter monitoring boards subjected to grid-switching transients and ground potential rise. IC Role / Device Role / Timing Role: High-energy clamping element on analog front-end inputs referenced to floating PV string potentials. Use Value: Withstands repeated 1500W pulses while maintaining <1µA leakage - avoids measurement drift or offset errors in precision shunt-based sensing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90CA | Lower PPK (600W), same VWM/VBR/VC specs, SMB package (smaller footprint, higher thermal resistance). | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 1 or high-current load dump. | Select SMBJ90CA only for space-constrained consumer electronics where peak surge energy is ≤600W. |
| 1.5KE91CA | Through-hole TO-218 package, identical 1500W rating and 91V nominal VBR, but slower response (>1ns) and no AEC-Q101 qualification. | Not suitable for automotive or automated SMT assembly; requires manual soldering and larger PCB area. | Choose 1.5KE91CA only for legacy through-hole designs or prototyping where AEC-Q101 and SMT are not required. |
Compared with SMBJ90CA and 1.5KE91CA, the SMCJ90CAH uniquely combines AEC-Q101 qualification, 1500W SMT capability, sub-1ps response, and ISO 7637-2 compliance - making it the only option qualified for production automotive power rail protection without design compromise.
Availability
SMCJ90CAH is available at Aetrix Electronics and suitable for automotive power distribution, industrial digital I/O protection, telecom power feeds, and renewable energy monitoring requiring stable component supply across extended temperature ranges and high-reliability certifications.
Supply support for SMCJ90CAH 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 automotive-qualified components since 1979.
The SMCJ90CAH belongs to TSC's AEC-Q101-qualified SMCJ series - engineered specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure where reliability, speed, and regulatory compliance are non-negotiable.
FAQ
What does the "CAH" suffix indicate in SMCJ90CAH?
The "CAH" suffix denotes a bidirectional configuration (C), AEC-Q101 qualification (A), and halogen-free construction (H). Unlike unidirectional variants (e.g., SMCJ90H), the SMCJ90CAH provides symmetrical clamping in both polarities - essential for protecting AC-coupled or floating signal lines without polarity constraints. This makes SMCJ90CAH ideal for differential bus protection and dual-rail systems where voltage reversal is possible.
How does SMCJ90CAH differ from SMCJ90AH?
The SMCJ90AH is unidirectional with a cathode band marking, while SMCJ90CAH is bidirectional with no functional polarity - both share identical VWM (90V), VBR (100–111V), VC (146V), and PPK (1500W) ratings. The key distinction lies in circuit integration: SMCJ90CAH eliminates polarity-aware layout and supports AC or reversible DC paths, whereas SMCJ90AH requires correct orientation relative to ground reference. For most automotive I/O and telecom ports, SMCJ90CAH simplifies design and improves fault tolerance.
Is SMCJ90CAH compatible with lead-free reflow processes?
Yes, SMCJ90CAH is fully compatible with standard lead-free reflow profiles (J-STD-020 Level 1), with a moisture sensitivity level (MSL) of 1 - meaning it can be stored indefinitely at ambient conditions without baking. Its matte tin-plated leads meet solderability requirements per J-STD-002, and the DO-214AB package withstands peak temperatures up to 260°C for 10 seconds, supporting high-volume automated assembly in automotive and industrial manufacturing lines.
What is the maximum clamping voltage of SMCJ90CAH under real-world surge conditions?
The maximum clamping voltage of SMCJ90CAH is 146 V, measured at 10.7 A peak impulse current using the standardized 10/1000 µs double-exponential waveform (per IEC 61000-4-5 and ISO 7637-2). This value is guaranteed across –55°C to +150°C junction temperature and represents worst-case let-through voltage during high-energy transients - enabling precise selection of downstream overvoltage protection thresholds and safe margining for 100V-rated components.
Does SMCJ90CAH meet ISO 7637-2 Pulse 1 requirements for automotive applications?
Yes, SMCJ90CAH is explicitly validated to meet ISO 7637-2 Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) waveforms. Its 1500W peak power rating and 146V clamping voltage ensure compliance when placed within 20 cm of the protected node, satisfying OEM requirements for BCM, ADAS, and infotainment subsystems - confirmed by Taiwan Semiconductor's AEC-Q101 test reports and application notes.
SMCJ90CAH 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):
- 90V
- Voltage - Breakdown (Min):
- 100V
- Voltage - Clamping (Max) @ Ipp:
- 146V
- Current - Peak Pulse (10/1000µs):
- 10.7A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ90CAH FAQ
1.How can I place an order for SMCJ90CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ90CAH 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 SMCJ90CAH reliable?
The price and inventory of SMCJ90CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ90CAH is usually 5 days.
3.What payment methods are accepted for SMCJ90CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ90CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ90CAH?
SMCJ90CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ90CAH 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 SMCJ90CAH?
For technical support, including SMCJ90CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ90CAH requirements.
6.How does Aetrix verify that SMCJ90CAH is sourced from the original manufacturer or authorized distributors?
All SMCJ90CAH 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 SMCJ90CAH meets industry standards.
7.What is the process for return or replacement of SMCJ90CAH?
All SMCJ90CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ90CAH, 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 SMCJ90CAH part is unused and in its original packaging.
Return procedure for SMCJ90CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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