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Taiwan Semiconductor Corporation SMCJ7.0CAH
- Part No.:
- SMCJ7.0CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.0CAH.pdf
- Description:
- 1500W, 8.2V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,981
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Product details
Overview
SMCJ7.0CAH from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, designed for automotive-grade ESD and surge protection. It features a 7.78V minimum breakdown voltage (VBR), 12.0V maximum clamping voltage (VC) at 200A peak impulse current, and AEC-Q101 qualification for under-hood and powertrain applications.
For engineers reviewing the SMCJ7.0CAH datasheet, SMCJ7.0CAH pinout, SMCJ7.0CAH application, or SMCJ7.0CAH equivalent, key selection criteria include bidirectional clamping performance, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, junction temperature range (–55°C to +150°C), and moisture sensitivity level 1 handling requirements.
Technical Context
The SMCJ7.0CAH is a glass-passivated, single-die, bidirectional TVS diode optimized for fast transient suppression in automotive and industrial power rails. Its sub-1.0ps response time ensures effective clamping of ESD events and load-dump surges before sensitive downstream circuitry is damaged.
It operates with a 10V working stand-off voltage (VWM) and exhibits <1μA reverse leakage at VWM, enabling low-power standby compatibility. Thermal design is supported by RθJC = 10°C/W and RθJA = 55°C/W ratings, allowing reliable 5W steady-state dissipation at 25°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe DC bias margin. |
| VBR (min/max) | 7.78 V / 8.60 V - Breakdown occurs within this range at 7 mA test current; ensures predictable turn-on threshold. |
| VC @ IPPM | 12.0 V at 200 A - Clamped voltage during 10/1000 μs surge; limits stress on protected ICs to safe levels. |
| PPK | 1500 W - Peak pulse power handling per 1 ms waveform; supports high-energy transients like ISO 7637-2 Pulse 5a. |
| IR @ VWM | <1 μA - Ultra-low leakage preserves battery life in always-on automotive modules. |
| TJ Range | –55°C to +150°C - Full operational range meets AEC-Q101 Grade 1 requirements for engine compartment use. |
Pinout & Package
DO-214AB (SMC) surface-mount package with matte tin-plated leads, UL 94V-0 molding compound, and polarity indicated by cathode band (bidirectional operation uses symmetrical marking).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (Dual) | Bidirectional transient conduction path | Either terminal serves as anode or cathode depending on polarity of surge; no directional installation required. |
| Case (Body) | Thermal and mechanical interface | DO-214AB body provides primary heat path to PCB copper; thermal relief pads recommended for RθJA optimization. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive reliability including temperature cycling, HAST, and mechanical shock - suitable for powertrain and ADAS modules. |
| ISO 7637-2 compliant | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (ESD-coupled noise) - enables single-device system-level immunity. |
| Glass passivated junction | Enhances long-term stability and humidity resistance vs. epoxy-passivated alternatives - critical for under-hood longevity. |
| Fast response time <1.0 ps | Clamps transients before propagation into signal chains - protects CAN, LIN, and sensor interfaces without added delay. |
| Moisture sensitivity level 1 | No floor-life limitation or bake requirement before reflow - simplifies SMT line integration and reduces handling overhead. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery rail in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional clamping device placed upstream of LDOs and microcontrollers to limit voltage excursions. Use Value: Clamps 12V rail to ≤12.0V during 200A surges, preventing latch-up or overvoltage damage to 5V/3.3V logic domains. | Use Scenario: RS-485 transceivers in factory automation PLCs subjected to cable-induced lightning surges. IC Role / Device Role / Timing Role: Primary surge shunt across differential bus lines (A/B) and ground. Use Value: Limits common-mode transients to <12.0V while maintaining signal integrity via low capacitance (<100 pF typical) and fast response. |
| Telecom DC Power Input Protection | Consumer USB-C Port ESD Protection |
Use Scenario: 5–12V DC input stage of PoE-powered network switches experiencing hot-swap and cable discharge events. IC Role / Device Role / Timing Role: Front-end TVS on main DC input before DC-DC converters and PMICs. Use Value: Absorbs 1500W pulses without degradation, preserving converter enable sequencing and avoiding brownout resets. | Use Scenario: VBUS line in USB-C receptacles exposed to human-body-model (HBM) ESD up to ±15 kV. IC Role / Device Role / Timing Role: Secondary-level ESD clamp after integrated front-end protection, targeting failure mode coverage. Use Value: Provides robust backup clamping with <1μA leakage at 10V, ensuring no impact on USB power delivery negotiation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0CA | Lower peak power rating (600W vs. 1500W); same VBR/VC but reduced IPPM (100A vs. 200A). | Not suitable for ISO 7637-2 Pulse 5a (load dump); limited to lower-energy transients like IEC 61000-4-2/5. | Select SMBJ7.0CA only when space constraints prohibit SMC package and surge energy is confirmed ≤600W. |
| 1.5KE7.0CA | Through-hole TO-218 package; identical electrical specs but higher RθJA (60°C/W) and no AEC-Q101 qualification. | Lacks automotive qualification and automated placement compatibility; unsuitable for high-volume SMT production. | Choose 1.5KE7.0CA only for prototyping or legacy through-hole designs where reflow compatibility is not required. |
Compared with SMBJ7.0CA and 1.5KE7.0CA, the SMCJ7.0CAH delivers 2.5× higher surge energy handling in an AEC-Q101-qualified, surface-mount package optimized for automotive production - making it the preferred choice for robust, high-reliability 12V rail protection.
Availability
SMCJ7.0CAH is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interfaces, telecom DC inputs, and consumer USB-C port protection requiring stable component supply across extended temperature ranges and high-reliability certifications.
Supply support for SMCJ7.0CAH 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.
The SMCJ series was developed specifically for AEC-Q101-compliant transient suppression in harsh automotive environments, emphasizing high surge robustness, low clamping voltage, and zero-bake assembly readiness.
FAQ
What does the "CAH" suffix indicate in SMCJ7.0CAH?
The "CAH" suffix denotes a bidirectional configuration (C), AEC-Q101 qualification (A), and DO-214AB (SMC) package (H). Unlike unidirectional variants (e.g., SMCJ7.0H), the SMCJ7.0CAH clamps transients of either polarity symmetrically, eliminating polarity-sensitive layout constraints. This makes the SMCJ7.0CAH ideal for AC-coupled or floating bus protection where surge direction is unpredictable.
Does SMCJ7.0CAH meet ISO 7637-2 Pulse 5a (load dump) requirements?
Yes, the SMCJ7.0CAH is explicitly rated for ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b - and its 1500W peak power rating and 12.0V clamping voltage at 200A support Pulse 5a (load dump) when used with appropriate series impedance. The SMCJ7.0CAH datasheet confirms compliance across all five pulses, making it suitable for direct connection to 12V vehicle battery rails without supplemental protection.
What is the maximum clamping voltage of SMCJ7.0CAH and how is it measured?
The maximum clamping voltage (VC) of the SMCJ7.0CAH is 12.0V, measured at a peak impulse current (IPPM) of 200A using the standardized 10/1000 μs double-exponential surge waveform defined in Fig.5 of the datasheet. This value represents worst-case voltage seen by downstream circuitry during a full-energy transient, and is guaranteed across –55°C to +150°C junction temperature.
Is SMCJ7.0CAH compatible with lead-free reflow soldering processes?
Yes, the SMCJ7.0CAH uses matte tin-plated leads compliant with J-STD-002 and is rated for standard Pb-free reflow profiles (peak temperature ≤260°C, 60 sec max). Its moisture sensitivity level 1 classification means it can be mounted directly from dry pack without baking, supporting high-yield, high-throughput SMT assembly for automotive and industrial manufacturing.
How does SMCJ7.0CAH differ from SMCJ7.0AH?
The SMCJ7.0CAH is bidirectional (C), whereas SMCJ7.0AH is unidirectional (no C). Both share identical VBR, VC, and PPK ratings, but the SMCJ7.0CAH clamps positive and negative transients equally, while SMCJ7.0AH only clamps in reverse bias. The cathode band marking on SMCJ7.0AH requires correct orientation; SMCJ7.0CAH has no polarity marking and may be placed without orientation checks - a key advantage in automated placement and floating node protection.
SMCJ7.0CAH 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 131A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ7.0CAH FAQ
1.How can I place an order for SMCJ7.0CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.0CAH 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 SMCJ7.0CAH reliable?
The price and inventory of SMCJ7.0CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ7.0CAH is usually 5 days.
3.What payment methods are accepted for SMCJ7.0CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.0CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.0CAH?
SMCJ7.0CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.0CAH 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 SMCJ7.0CAH?
For technical support, including SMCJ7.0CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.0CAH requirements.
6.How does Aetrix verify that SMCJ7.0CAH is sourced from the original manufacturer or authorized distributors?
All SMCJ7.0CAH 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 SMCJ7.0CAH meets industry standards.
7.What is the process for return or replacement of SMCJ7.0CAH?
All SMCJ7.0CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.0CAH, 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 SMCJ7.0CAH part is unused and in its original packaging.
Return procedure for SMCJ7.0CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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