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Taiwan Semiconductor Corporation SMCJ90AH
- Part No.:
- SMCJ90AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ90AH.pdf
- Description:
- TVS DIODE 90VWM 146VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,882
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Product details
Overview
SMCJ90AH from Taiwan Semiconductor is a unidirectional 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 pulse current. It is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and ESD protection.
For engineers reviewing the SMCJ90AH datasheet, SMCJ90AH pinout, SMCJ90AH application, or SMCJ90AH equivalent, this device is selected for robust overvoltage protection in DC power rails, automotive ECUs, and industrial I/O interfaces where fast response (<1.0 ps), low leakage (<1 µA @ 90V), and high surge immunity are required.
Technical Context
The SMCJ90AH employs a glass-passivated silicon junction optimized for unidirectional transient suppression. Its clamping behavior follows the 10/1000 µs standard waveform per IEC 61000-4-5 and ANSI/IEEE C62.35, delivering 146 V clamping at 10.7 A IPPM with <1 µA reverse leakage at rated VWM.
Thermally, it features RθJA = 55°C/W and RθJC = 10°C/W, enabling reliable operation up to TJ = +150°C. The device is rated for 200 A non-repetitive forward surge (IFSM) and supports automated SMT placement with matte tin-plated leads compliant to J-STD-002.
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 @ IT = 1 mA - Confirmed breakdown range ensuring predictable turn-on threshold |
| VC @ IPPM | 146 V @ 10.7 A - Clamping voltage limiting downstream circuit stress during 10/1000 µs transients |
| PPK | 1500 W - Peak pulse power handling capability under standardized surge conditions |
| IR @ VWM | <1 µA - Negligible leakage current preserving system efficiency and battery life |
| TJ max | +150 °C - Junction temperature rating supporting under-hood automotive and industrial ambient environments |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with 7.11 mm x 6.22 mm footprint and 2.3 mm height |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with cathode band marking; matte tin-plated leads; polarity indicated by cathode band on unidirectional devices; weight ≈ 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line (e.g., ground or return path) |
| Cathode | Clamping terminal | Connected to higher-potential side (e.g., 90V rail); marked with band; conducts during reverse transient |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive electronics including engine control, body modules, and ADAS sensors |
| Glass passivated junction | Enhanced moisture resistance and long-term stability vs. epoxy-passivated alternatives |
| ISO 7637-2 compliance | Proven immunity to load-dump (Pulse 5a), supply transients (Pulse 1/2a/2b), and coupling noise (Pulse 3a/3b) |
| Fast response time | <1.0 ps rise time ensures clamping activation before sensitive ICs experience overstress |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive for environmentally compliant manufacturing |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed microcontroller power inputs in engine control units against load-dump spikes up to 120 V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VCC and GND to clamp transients before they reach LDOs or MCU VDD pins. Use Value: Limits voltage to ≤146 V during 10.7 A surges, preventing latch-up or permanent damage to 5 V or 3.3 V logic supplies. | Use Scenario: Shielding analog input channels (e.g., 4–20 mA sensor loops) in programmable logic controllers from field-induced surges. IC Role / Device Role / Timing Role: Front-end transient suppressor on signal lines entering isolation amplifiers or ADC front-ends. Use Value: Maintains signal integrity by suppressing >1 kV transients while adding <1 µA leakage that avoids offset drift in precision current sensing. |
| Telecom DC Power Feeds | Consumer Equipment AC/DC Adapter Outputs |
Use Scenario: Safeguarding PoE-powered Ethernet switches and base station RF modules connected to centralized 48 V DC distribution. IC Role / Device Role / Timing Role: Secondary-level TVS on 48 V bus after primary DC/DC conversion, coordinated with upstream fusing. Use Value: Absorbs 1500 W surges without degradation, enabling single-device protection instead of stacked Zener arrays. | Use Scenario: Overvoltage protection on the +12 V output of wall-mounted AC/DC adapters used in smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: Final-stage clamping device placed immediately before connector or USB-PD controller input. Use Value: Prevents ESD events (IEC 61000-4-2 ±8 kV contact) from propagating into SoC power domains due to sub-1 ps response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A | 600 W PPK rating, SMB package (smaller footprint), same VWM/VBR/VC specs scaled to lower power | Lower surge capacity limits use to consumer-grade or low-energy industrial signals | Select when board space is constrained and peak transients remain ≤600 W |
| 1.5KE91A | Through-hole DO-201 package, 1500 W rating, but slower thermal response and no AEC-Q101 qualification | Not suitable for automotive or high-reliability automated assembly; requires wave soldering | Choose only for legacy through-hole designs where rework tolerance outweighs AEC-Q101 needs |
Compared with SMBJ90A and 1.5KE91A, the SMCJ90AH delivers identical 90 V stand-off and superior automotive qualification in a surface-mount package optimized for high-volume SMT lines-making it the preferred choice for new automotive and industrial designs requiring 1500 W surge immunity.
Availability
SMCJ90AH is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC I/O conditioning, and telecom DC feed protection requiring stable component supply across production lifecycles.
Supply support for SMCJ90AH 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 components.
The SMCJ series is designed specifically for high-power, surface-mount transient suppression in automotive, industrial, and telecom infrastructure-emphasizing AEC-Q101 reliability, ISO 7637-2 compliance, and tight parametric consistency across voltage grades.
FAQ
What is the clamping voltage of SMCJ90AH and how is it measured?
The SMCJ90AH has a maximum clamping voltage (VC) of 146 V, measured at 10.7 A peak pulse current (IPPM) using the standardized 10/1000 µs double-exponential waveform per IEC 61000-4-5. This value represents the upper limit of voltage seen by downstream circuitry during worst-case transient events, and is confirmed in the manufacturer's electrical specifications table for SMCJ90AH. The test condition ensures repeatable, design-relevant performance validation.
Is SMCJ90AH unidirectional or bidirectional, and how can I identify its polarity?
SMCJ90AH is a unidirectional TVS diode, intended for DC line protection where polarity is fixed. Polarity is identified by a cathode band marked on the DO-214AB (SMC) package body-this band must be oriented toward the higher-potential side (e.g., 90 V rail) during PCB layout. Bidirectional variants use "CH" or "CAH" suffixes (e.g., SMCJ90CH); the "H" suffix alone confirms unidirectional configuration for SMCJ90AH.
Does SMCJ90AH meet automotive qualification standards?
Yes, SMCJ90AH is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for automotive electrical systems. This certification covers immunity to coupled transients, supply interruptions, and load-dump events-making SMCJ90AH suitable for engine control units, body electronics, and ADAS modules without additional qualification testing.
What is the maximum reverse leakage current for SMCJ90AH at its working voltage?
The maximum reverse leakage current (IR) for SMCJ90AH is less than 1 µA when biased at its full working stand-off voltage of 90 V, measured at TA = 25°C. This ultra-low leakage preserves power efficiency in always-on systems such as automotive telematics or industrial sensors, and avoids false triggering or bias errors in precision analog circuits downstream of the SMCJ90AH.
Can SMCJ90AH be used in place of SMCJ90H, and what is the key difference?
SMCJ90AH and SMCJ90H share the same package, VWM (90 V), and PPK (1500 W), but differ in breakdown voltage tightness: SMCJ90AH has a narrower VBR range (100–111 V) versus SMCJ90H (100–122 V). This tighter tolerance improves predictability in clamping onset and reduces variation across production lots-making SMCJ90AH preferable for designs requiring consistent transient response timing and minimal VBR spread.
SMCJ90AH 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):
- 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)
SMCJ90AH FAQ
1.How can I place an order for SMCJ90AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ90AH 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 SMCJ90AH reliable?
The price and inventory of SMCJ90AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ90AH is usually 5 days.
3.What payment methods are accepted for SMCJ90AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ90AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ90AH?
SMCJ90AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ90AH 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 SMCJ90AH?
For technical support, including SMCJ90AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ90AH requirements.
6.How does Aetrix verify that SMCJ90AH is sourced from the original manufacturer or authorized distributors?
All SMCJ90AH 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 SMCJ90AH meets industry standards.
7.What is the process for return or replacement of SMCJ90AH?
All SMCJ90AH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ90AH, 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 SMCJ90AH part is unused and in its original packaging.
Return procedure for SMCJ90AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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