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Taiwan Semiconductor Corporation SMCJ8.0H
- Part No.:
- SMCJ8.0H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ8.0H.pdf
- Description:
- 1500W, 9.9V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,428
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Product details
Overview
SMCJ8.0H from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 8.0V working stand-off voltage (VWM), 8.89–10.9V breakdown voltage (VBR), and 15.0V maximum clamping voltage (VC) at 50A peak pulse current - designed for ESD and surge protection in automotive power rails and industrial I/O interfaces.
For engineers reviewing the SMCJ8.0H datasheet, SMCJ8.0H pinout, SMCJ8.0H application, or SMCJ8.0H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, ISO 7637-2 compliance, thermal resistance values, and real-world clamping performance data required for robust overvoltage design in 12V automotive systems and industrial control modules.
Technical Context
The SMCJ8.0H employs a glass-passivated silicon junction to achieve sub-1.0ps response time and low leakage (<1μA above 10V), enabling fast suppression of ESD events and load-dump transients. Its unidirectional configuration provides forward conduction capability with VF = 3.5V at 100A, supporting bidirectional surge immunity when paired with complementary devices.
Rated for TJ = –55°C to +150°C operation and compliant with JESD201 Class 2 whisker resistance, the device sustains 1500W peak pulse power (10/1000μs waveform) with RθJA = 55°C/W and RθJC = 10°C/W - enabling reliable thermal management in high-density PCB layouts without forced airflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before clamping begins; sets system-level overvoltage threshold for 12V nominal supply rails. |
| VBR min/max | 8.89–10.9 V @ IT = 1 mA - Confirmed breakdown range ensures consistent turn-on across production lots and temperature extremes. |
| VC @ IPPM | 15.0 V @ 50 A - Clamping voltage during 10/1000μs surge defines worst-case voltage seen by protected ICs; enables safe operation of 5V/3.3V logic downstream. |
| PPK | 1500 W - Peak pulse power rating per 1ms non-repetitive surge; supports ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test profiles. |
| IR @ VWM | <1 μA - Ultra-low reverse leakage minimizes standby power loss and avoids false triggering in high-impedance sensing circuits. |
| TJ max | +150 °C - Maximum junction temperature rating allows deployment in under-hood automotive environments and sealed industrial enclosures. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, single-diode unidirectional configuration with cathode band marking. Matte tin-plated leads, RoHS and halogen-free compliant, moisture sensitivity level 1 (J-STD-020).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-side reference; completes clamping loop during positive transients on cathode-connected line. |
| Cathode | Protected line connection / Surge input node | Connected to the signal or power rail requiring protection (e.g., 12V battery feed); conducts during overvoltage events to shunt energy to ground. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control units and body electronics. |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) - eliminates need for external test conditioning circuitry. |
| Glass passivated junction | Ensures stable VBR and low IR over lifetime; prevents parameter drift due to humidity or contamination in harsh industrial environments. |
| Fast response time | <1.0 ps rise time from 0 V to VBR min - intercepts ESD events before sensitive CMOS inputs reach destructive voltage levels. |
| Low clamping ratio | VC/VBR ≈ 1.38 (15.0 V / 10.9 V max) - tight clamping margin preserves noise immunity while minimizing stress on downstream TVS stages or ICs. |
Applications
| Automotive Power Rail Protection | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting 12V battery-fed microcontroller power inputs against load dump and jump-start surges in vehicle ECUs. IC Role / Device Role / Timing Role: Primary unidirectional TVS clamp placed between battery rail and LDO input, absorbing up to 1500W transients without failure. Use Value: Enables compliance with ISO 16750-2 (load dump) and extends system uptime by preventing latch-up or burnout of PMICs and MCU voltage regulators. |
Use Scenario: Shielding RS-485 transceiver VCC pins and signal lines from ESD and inductive switching noise in factory automation PLCs. IC Role / Device Role / Timing Role: Standoff-rated TVS placed at board-level power entry point and signal interface connectors to limit transient propagation into communication ICs. Use Value: Reduces field failures caused by ±8kV contact ESD (IEC 61000-4-2) and improves mean time between failures (MTBF) in dusty, high-noise plant-floor environments. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding PoE-powered network switches and base station radios from lightning-induced surges entering via 48V DC input ports. IC Role / Device Role / Timing Role: First-stage surge absorber in multi-tier protection scheme, clamping transients before they reach DC-DC converters and Ethernet PHYs. Use Value: Maintains <15.0V clamping ceiling at 50A, ensuring secondary protection devices (e.g., polymer PTCs, GDTs) operate within safe energy limits during coordinated surge events. |
Use Scenario: Suppressing back-EMF spikes generated by brushed DC motors in smart home appliances (e.g., washing machine control boards). IC Role / Device Role / Timing Role: Unidirectional TVS connected across motor terminals or H-bridge outputs to clamp inductive kickback during PWM commutation. Use Value: Prevents MOSFET avalanche breakdown and gate oxide damage by limiting flyback voltage to ≤15.0V, extending power stage lifetime and reducing warranty claims. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0A | Lower peak power rating (600W vs. 1500W); SMB package (smaller footprint, higher RθJA = 85°C/W) | Not suitable for ISO 7637-2 Pulse 1 or sustained load-dump events; limited to low-energy ESD-only use cases. | Select SMCJ8.0H when system-level surge tests require ≥1500W handling or ambient temperatures exceed 85°C. |
| 1.5KE8.2A | Through-hole TO-204AA (DO-41); same VWM (8.2V) but slower response (>1ns), higher clamping (17.2V @ 65A), no AEC-Q101 qualification | Requires PCB through-hole space and reflow-compatible assembly process; unsuitable for automotive or automated SMT lines. | Choose SMCJ8.0H for surface-mount compatibility, AEC-Q101 validation, and tighter clamping performance in space-constrained designs. |
Compared with SMBJ8.0A and 1.5KE8.2A, the SMCJ8.0H delivers 2.5× higher surge power capacity, AEC-Q101 certification for automotive use, and lower clamping voltage - making it the preferred choice for high-reliability 12V rail protection where board area, thermal performance, and qualification rigor are critical.
Availability
SMCJ8.0H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom power supply designs requiring stable component supply, long-term lifecycle support, and full traceability.
Supply support for SMCJ8.0H 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 SMCJ series was developed specifically for high-power transient suppression in automotive and industrial applications, emphasizing AEC-Q101 reliability, ISO 7637-2 compliance, and robust thermal performance in compact SMC packages.
FAQ
What is the clamping voltage of SMCJ8.0H at its rated peak pulse current?
The SMCJ8.0H has a maximum clamping voltage (VC) of 15.0 V at 50 A peak pulse current (IPPM), measured using the standard 10/1000 μs double-exponential waveform. This value is guaranteed across temperature and production lots, and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMCJ8.0H suitable for automotive applications?
Yes, the SMCJ8.0H is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements - making it appropriate for under-hood and cabin electronics including body control modules, infotainment power supplies, and ADAS sensor interfaces. Its –55°C to +150°C operating range and JESD201 Class 2 whisker resistance further validate its suitability for automotive deployment.
How does SMCJ8.0H differ from SMCJ8.0AH?
The SMCJ8.0H has a VBR range of 8.89–10.9 V, while the SMCJ8.0AH variant tightens the upper bound to 9.83 V (min 8.89 V). Both share identical VWM (8.0 V), VC (15.0 V), and packaging, but the 'A' suffix denotes tighter VBR tolerance - useful where precise clamping onset timing or reduced variation in surge response is required across temperature and unit-to-unit.
What is the forward voltage drop of SMCJ8.0H?
The SMCJ8.0H exhibits a forward voltage (VF) of 3.5 V at 100 A forward surge current, per the datasheet note specifying VF = 3.5 V for SMCJ5.0H–SMCJ90H devices. This value applies only during unidirectional forward conduction (e.g., during negative-going transients on cathode-connected lines) and is relevant for calculating power dissipation during sustained overcurrent conditions.
Does SMCJ8.0H require derating at elevated ambient temperatures?
Yes, the SMCJ8.0H must be derated above TA = 25°C per Figure 2 in the datasheet: peak pulse power decreases linearly to zero at +150°C ambient. With RθJA = 55°C/W, a 100°C ambient environment reduces usable peak power to approximately 750W - requiring careful thermal layout (copper pour, vias) and verification against worst-case surge profiles in final system design.
SMCJ8.0H 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):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 15V
- Current - Peak Pulse (10/1000µs):
- 105A
- 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)
SMCJ8.0H FAQ
1.How can I place an order for SMCJ8.0H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ8.0H 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 SMCJ8.0H reliable?
The price and inventory of SMCJ8.0H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ8.0H is usually 5 days.
3.What payment methods are accepted for SMCJ8.0H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ8.0H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ8.0H?
SMCJ8.0H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ8.0H 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 SMCJ8.0H?
For technical support, including SMCJ8.0H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ8.0H requirements.
6.How does Aetrix verify that SMCJ8.0H is sourced from the original manufacturer or authorized distributors?
All SMCJ8.0H 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 SMCJ8.0H meets industry standards.
7.What is the process for return or replacement of SMCJ8.0H?
All SMCJ8.0H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ8.0H, 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 SMCJ8.0H part is unused and in its original packaging.
Return procedure for SMCJ8.0H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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