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Taiwan Semiconductor Corporation SMCJ11H
- Part No.:
- SMCJ11H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ11H.pdf
- Description:
- 1500W, 13.6V, 10%, UNIDIRECTIONA
- Quantity:
- Payment:
- Shipping:
Inventory:4,168
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Product details
Overview
SMCJ11H from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 12.2V minimum breakdown voltage (VBR), 11V working stand-off voltage (VWM), and 20.1V maximum clamping voltage (VC) at 78A peak pulse 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 SMCJ11H datasheet, SMCJ11H pinout, SMCJ11H application, or SMCJ11H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance values, clamping performance under 10/1000μs surge, and direct alternatives for ESD and load-switching protection in 12V automotive systems.
Technical Context
The SMCJ11H employs a glass-passivated silicon junction optimized for fast transient response (<1.0ps rise time from 0V to VBR min) and low leakage (<1μA at 11V). Its unidirectional configuration provides asymmetric clamping with forward voltage of 3.5V at 100A, enabling robust protection on DC-biased lines without reverse conduction during normal operation.
Thermally, it features RθJA = 55°C/W and RθJC = 10°C/W, supporting sustained 5W steady-state dissipation at 25°C ambient. It meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements, confirming suitability for automated SMT assembly in harsh-environment applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin above 12V nominal rail. |
| VBR (min/max) | 12.2 V / 14.9 V @ 1 mA - Confirmed breakdown threshold range ensures reliable turn-on during transients while avoiding false triggering. |
| VC @ IPPM | 20.1 V @ 78 A - Clamping voltage under 10/1000μs surge defines worst-case overvoltage seen by protected ICs. |
| PPK | 1500 W - Peak pulse power rating determines survivability against high-energy transients like load dump or inductive kick. |
| IR @ VWM | <1 μA - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in always-on circuits. |
| TJ max | +150 °C - Maximum junction temperature enables operation in under-hood automotive environments without derating. |
| RθJA | 55 °C/W - Junction-to-ambient thermal resistance informs PCB copper area requirements for thermal management. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, single-die unidirectional TVS diode with cathode band marking. Matte tin-plated leads, J-STD-002 solderable, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or negative rail; establishes clamping path for positive transients on cathode side. |
| Cathode | Protected line input | Connected to 12V supply or signal line; conducts surge current to anode when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test conditions. |
| ISO 7637-2 compliance | Guaranteed clamping performance against standardized automotive transients (Pulse 1, 2a, 2b, 3a, 3b) without failure. |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal/humidity stress versus epoxy-passivated alternatives. |
| Fast response time | <1.0 ps from 0 V to VBR min ensures suppression initiates before sensitive downstream components experience overvoltage. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive, supporting environmentally compliant manufacturing and end-of-life processing. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protecting 12V power inputs of BCM microcontrollers and CAN transceivers from load-dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between fused 12V rail and local regulator input. Use Value: Limits transient overvoltage to ≤20.1V, preventing latch-up or gate oxide damage in 3.3V/5V logic powered from buck converters. |
Use Scenario: Safeguarding 24V digital input channels on modular PLC I/O cards exposed to field-wiring inductive spikes. IC Role / Device Role / Timing Role: Primary surge suppression stage ahead of optocoupler input and series current-limiting resistor. Use Value: Absorbs up to 1500W pulses without degradation, maintaining <1μA leakage to ensure accurate 24V logic-level detection. |
| Telecom Power Supply Front-End | Automotive Infotainment USB Port |
Use Scenario: Secondary protection on +48V telecom rectifier outputs subjected to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Coordinated clamping device downstream of MOV-based primary protection, handling residual energy. Use Value: Delivers precise 20.1V clamping at 78A, enabling tighter tolerance design of downstream DC-DC converters and reducing required output capacitor derating. |
Use Scenario: ESD and transient protection on VBUS line of automotive-grade USB Type-A ports in head units. IC Role / Device Role / Timing Role: Unidirectional TVS placed between USB connector and USB switch IC, referenced to chassis ground. Use Value: Meets IEC 61000-4-2 Level 4 (±15kV air/±8kV contact) and ISO 7637-2 Pulse 2b, ensuring port survivability in vehicle cabin environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11A | Lower peak power (600W), smaller SMB package (DO-214AA), higher VC = 19.9V @ 32A | Targeted at space-constrained consumer electronics; insufficient for automotive load-dump per ISO 7637-2 Pulse 5a. | Select SMCJ11H when 1500W surge handling and AEC-Q101 qualification are mandatory. |
| 1.5KE11A | Through-hole TO-204AE (DO-201AE), same VWM/VBR, VC = 18.2V @ 83A, but no AEC-Q101 or ISO 7637-2 validation | Used in legacy industrial power supplies where automated SMT is not required and automotive compliance is unnecessary. | Choose SMCJ11H for new SMT designs requiring automotive qualification and surface-mount compatibility. |
Compared with SMBJ11A and 1.5KE11A, the SMCJ11H uniquely combines 1500W surge capability, AEC-Q101 qualification, ISO 7637-2 compliance, and DO-214AB packaging - making it the only option among the three validated for modern automotive power rail protection with zero layout compromise.
Availability
SMCJ11H is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input protection, telecom power front-ends, and infotainment USB VBUS protection requiring stable component supply across extended production lifecycles.
Supply support for SMCJ11H 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 SMCJ11H belongs to TSC's AEC-Q101-qualified SMCJ-H series of high-power TVS diodes engineered specifically for automotive and industrial transient immunity - emphasizing low clamping ratio, fast response, and process-controlled glass passivation.
FAQ
What is the clamping voltage of the SMCJ11H under standard 10/1000μs surge conditions?
The SMCJ11H has a maximum clamping voltage (VC) of 20.1 V at 78 A peak pulse current (IPPM) under the standardized 10/1000μs waveform defined in IEC 61000-4-5 and ISO 7637-2. This value is measured with specified test conditions per ANSI/IEEE C62.35 and confirmed in Taiwan Semiconductor's official datasheet revision A2102. The SMCJ11H maintains this clamping performance across its full operating temperature range.
Is the SMCJ11H suitable for bidirectional transient protection?
No - the SMCJ11H is a unidirectional TVS diode intended for DC-biased lines such as 12V automotive power rails. For bidirectional protection, Taiwan Semiconductor offers the SMCJ11AH variant (marked GDZ), which features symmetrical clamping in both polarities and identical VWM, VBR, and VC ratings. The SMCJ11H must not be used in AC-coupled or floating signal paths without external biasing.
Does the SMCJ11H meet automotive qualification standards?
Yes - the SMCJ11H is explicitly AEC-Q101 qualified per the manufacturer's documentation and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity requirements. It also passes JESD201 Class 2 whisker testing and is rated for operation from −55°C to +150°C junction temperature, fulfilling key reliability criteria for under-hood and cabin automotive applications.
What is the forward voltage drop of the SMCJ11H during surge conduction?
The SMCJ11H exhibits a forward voltage (VF) of 3.5 V at 100 A, consistent with all SMCJ5.0H–SMCJ90H unidirectional devices per the datasheet note. This VF applies only during high-current forward conduction (e.g., positive transients on cathode), and does not affect reverse-biased operation. The low VF minimizes power dissipation during clamping and supports efficient energy diversion to ground.
How does the SMCJ11H compare to the SMCJ11AH in terms of electrical performance?
The SMCJ11H and SMCJ11AH share identical VWM (11 V), VBR range (12.2–14.9 V), and PPK (1500 W), but differ in configuration: SMCJ11H is unidirectional with cathode-marked polarity, while SMCJ11AH is bidirectional with symmetrical breakdown. The SMCJ11AH has slightly lower VC (18.2 V vs. 20.1 V) and higher IPPM (86 A vs. 78 A), reflecting its dual-path conduction architecture. Both are AEC-Q101 qualified.
SMCJ11H 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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 20.1V
- Current - Peak Pulse (10/1000µs):
- 78A
- 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)
SMCJ11H FAQ
1.How can I place an order for SMCJ11H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ11H 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 SMCJ11H reliable?
The price and inventory of SMCJ11H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ11H is usually 5 days.
3.What payment methods are accepted for SMCJ11H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ11H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ11H?
SMCJ11H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ11H 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 SMCJ11H?
For technical support, including SMCJ11H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ11H requirements.
6.How does Aetrix verify that SMCJ11H is sourced from the original manufacturer or authorized distributors?
All SMCJ11H 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 SMCJ11H meets industry standards.
7.What is the process for return or replacement of SMCJ11H?
All SMCJ11H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ11H, 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 SMCJ11H part is unused and in its original packaging.
Return procedure for SMCJ11H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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