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Taiwan Semiconductor Corporation SMCJ7.5CAH
- Part No.:
- SMCJ7.5CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.5CAH.pdf
- Description:
- 1500W, 8.8V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,742
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Product details
Overview
SMCJ7.5CAH from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 7.5V working stand-off voltage, 8.33–9.21V breakdown voltage at 1mA, and 12.9V maximum clamping voltage at 100A peak pulse current. It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients and ESD.
For engineers reviewing the SMCJ7.5CAH datasheet, SMCJ7.5CAH pinout, SMCJ7.5CAH application, or SMCJ7.5CAH equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, bidirectional clamping behavior, thermal resistance values, and direct alternative part comparisons for robust overvoltage protection design.
Technical Context
The SMCJ7.5CAH is a glass-passivated, bipolar junction TVS diode designed for unidirectional or bidirectional surge suppression. Its 1500W peak pulse power rating (tp = 1 ms) and sub-1.0 ps response time enable effective clamping of fast-rising transients induced by load switching and lightning.
It operates across –55°C to +150°C junction temperature range, features <1 µA reverse leakage at 7.5V, and meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability standards. The device is rated per ANSI/IEEE C62.35 and qualified to AEC-Q101 for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 8.33 V / 9.21 V @ 1 mA - Breakdown threshold range defining turn-on consistency |
| VC @ IPPM | 12.9 V @ 100 A - Clamped voltage during worst-case 1 ms surge, limiting downstream stress |
| PPK | 1500 W - Peak pulse power handling capability per single 1 ms transient |
| IR @ VWM | <1 µA - Negligible leakage current ensures minimal standby power loss |
| RθJA / RθJC | 55 °C/W / 10 °C/W - Thermal resistance values guiding PCB copper area and heatsinking needs |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration with cathode band omitted (symmetrical terminals).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Transient return path (bidirectional) | Connects to protected line; conducts during negative surges relative to cathode reference |
| Cathode (K) | Transient return path (bidirectional) | Connects to protected line; conducts during positive surges relative to anode reference |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock |
| ISO 7637-2 compliance | Withstands standardized automotive transient pulses (Pulse 1, 2a, 2b, 3a, 3b) without degradation |
| Fast response time | <1.0 ps rise time ensures clamping activation before sensitive ICs experience overstress |
| Glass passivated junction | Enhances long-term reliability and moisture resistance vs. epoxy-passivated alternatives |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS directives for environmentally compliant manufacturing |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs, lighting modules, and body control units from load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across power rail and ground to shunt surge energy before it reaches downstream regulators and microcontrollers. Use Value: Limits voltage excursion to ≤12.9V during 100A transients, preserving 15V-rated components without derating. | Use Scenario: Safeguarding analog input channels and digital I/O on programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on signal lines interfacing with solenoids, motors, and long cable runs. Use Value: Sub-1ps response prevents latch-up in precision ADCs and isolators during fast EFT bursts per IEC 61000-4-4. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drivers |
Use Scenario: Securing 48V DC power inputs in base station remote radio units and optical network terminals. IC Role / Device Role / Timing Role: Standoff-clamp TVS deployed between DC input and primary DC/DC converter stage. Use Value: 1500W peak power rating absorbs repetitive lightning-induced surges per ITU-T K.20/21 without parametric shift. | Use Scenario: Shielding H-bridge gate drivers and current sense amplifiers in washing machine and HVAC motor control boards. IC Role / Device Role / Timing Role: Bidirectional clamp across half-bridge supply rails to suppress shoot-through-induced voltage spikes. Use Value: Symmetrical clamping ensures equal protection during both high-side and low-side switching transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5CA | 600W peak power, SMB package (smaller footprint, higher RθJA = 85°C/W) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a (load dump) | Select when board space is constrained and surge energy does not exceed 600W |
| 1.5KE7.5CA | Through-hole DO-201 package, 1500W rating, slower response (~1ns), higher clamping (13.4V) | Not suitable for automated SMT assembly; requires wave soldering or hand assembly | Select only for legacy through-hole designs where rework flexibility outweighs SMT efficiency |
Compared with SMBJ7.5CA and 1.5KE7.5CA, the SMCJ7.5CAH delivers superior surge robustness in SMT format with tighter clamping (12.9V vs. 13.4V) and AEC-Q101 validation-making it the preferred choice for new automotive and industrial designs requiring high-reliability surface-mount TVS protection.
Availability
SMCJ7.5CAH is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, telecom DC power feeds, and consumer appliance motor drivers requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMCJ7.5CAH 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 SMCJ series is engineered specifically for high-energy transient suppression in automotive and industrial environments, emphasizing AEC-Q101 compliance, ISO 7637-2 immunity, and robust thermal performance in compact SMC packages.
FAQ
What does the "CAH" suffix indicate in SMCJ7.5CAH?
The "CAH" suffix denotes a bidirectional configuration (C), AEC-Q101 qualification (A), and high-reliability construction (H). Unlike unidirectional "H" variants, SMCJ7.5CAH provides symmetrical clamping for both polarities-critical for protecting AC-coupled signals or floating power rails where voltage reversals may occur. This makes SMCJ7.5CAH distinct from SMCJ7.5H and SMCJ7.5AH.
Does SMCJ7.5CAH meet automotive qualification standards?
Yes, SMCJ7.5CAH is explicitly AEC-Q101 qualified per the manufacturer's datasheet (Version A2102), covering stress tests including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing. Its compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b further validates its suitability for automotive power networks, distinguishing it from commercial-grade TVS diodes.
What is the maximum clamping voltage of SMCJ7.5CAH under surge conditions?
The maximum clamping voltage of SMCJ7.5CAH is 12.9 V at 100 A peak pulse current (IPPM), measured with a 10/1000 µs waveform per REA standard. This value is confirmed in the Electrical Specifications table for the SMCJ7.5AH variant (which shares identical clamping performance with SMCJ7.5CAH due to same die and packaging), ensuring predictable overvoltage limiting during real-world transients.
Can SMCJ7.5CAH replace SMCJ7.5A in an existing design?
SMCJ7.5CAH can replace SMCJ7.5A only if bidirectional protection is required and layout accommodates symmetrical terminal routing. SMCJ7.5A is unidirectional with cathode marking; SMCJ7.5CAH has no polarity marking and clamps equally in both directions. No PCB changes are needed for footprint, but circuit analysis must confirm that reverse conduction during negative transients is acceptable in the target application.
What is the thermal resistance profile of SMCJ7.5CAH, and how does it affect PCB layout?
SMCJ7.5CAH has RθJA = 55°C/W and RθJC = 10°C/W. These values require ≥100 mm² of 1 oz. copper connected to each pad for adequate heat dissipation during repetitive surges. Insufficient copper area risks exceeding the 150°C max junction temperature during sustained transient events-especially critical in enclosed automotive enclosures where ambient temperatures exceed 85°C.
SMCJ7.5CAH 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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 122A
- 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)
SMCJ7.5CAH FAQ
1.How can I place an order for SMCJ7.5CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.5CAH 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 SMCJ7.5CAH reliable?
The price and inventory of SMCJ7.5CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ7.5CAH is usually 5 days.
3.What payment methods are accepted for SMCJ7.5CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.5CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.5CAH?
SMCJ7.5CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.5CAH 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 SMCJ7.5CAH?
For technical support, including SMCJ7.5CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.5CAH requirements.
6.How does Aetrix verify that SMCJ7.5CAH is sourced from the original manufacturer or authorized distributors?
All SMCJ7.5CAH 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 SMCJ7.5CAH meets industry standards.
7.What is the process for return or replacement of SMCJ7.5CAH?
All SMCJ7.5CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.5CAH, 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 SMCJ7.5CAH part is unused and in its original packaging.
Return procedure for SMCJ7.5CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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