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Taiwan Semiconductor Corporation SMCJ7.5AH
- Part No.:
- SMCJ7.5AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.5AH.pdf
- Description:
- 1500W, 8.8V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,453
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Product details
Overview
SMCJ7.5AH from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, designed for automotive-grade ESD and surge protection. It features a 7.5V working stand-off voltage (VWM), 8.33–9.21V breakdown voltage (VBR), 12.9V clamping voltage (VC) at 100A peak pulse current, and AEC-Q101 qualification for under-hood electronics.
For engineers reviewing the SMCJ7.5AH datasheet, SMCJ7.5AH pinout, SMCJ7.5AH application, or SMCJ7.5AH equivalent, key selection criteria include clamping performance at 100A, unidirectional polarity marking, compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b, and thermal derating above 25°C ambient.
Technical Context
The SMCJ7.5AH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 8.33–9.21V breakdown range at 1mA test current. Its fast response (<1.0ps) enables suppression of ESD events and load-switching transients before downstream ICs are damaged.
Thermal design relies on RθJC = 10°C/W and RθJA = 55°C/W, supporting continuous power dissipation up to 5W at 25°C ambient and pulsed operation up to 1500W for 1ms. Junction temperature is rated from –55°C to +150°C, matching automotive under-hood requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum DC or continuous reverse operating voltage before conduction begins |
| VBR min/max | 8.33 V / 9.21 V - Breakdown occurs within this range at 1 mA, defining turn-on threshold tolerance |
| VC @ IPPM | 12.9 V at 100 A - Clamped voltage during worst-case 100A surge, limiting stress on protected circuitry |
| PPK | 1500 W - Peak pulse power handling per 1ms waveform, enabling robust ISO 7637-2 compliance |
| IR @ VWM | <1 µA - Ultra-low leakage ensures minimal standby current draw in battery-powered systems |
| TJ max | +150 °C - Supports operation in high-temperature automotive environments without derating |
Pinout & Package
DO-214AB (SMC) surface-mount package with cathode band marking on one end; leads are matte tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or low-side reference in unidirectional TVS configuration |
| Cathode | Reverse-biased protection terminal | Connected to protected line (e.g., CAN_H, LIN, power rail); marked by band |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| Glass passivated junction | Enhances reliability and stability of breakdown voltage over temperature and lifetime |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
| Moisture sensitivity level 1 | No floor life limitation or bake requirement prior to reflow, simplifying SMT assembly |
Applications
| Automotive Power Line Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs from load-dump spikes and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 7.5V. Use Value: Limits peak voltage to 12.9V at 100A, preventing damage to 16V-rated regulators and microcontrollers. | Use Scenario: Shielding high-speed CAN_H/CAN_L lines from ESD and coupled noise in vehicle networks. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; SMCJ7.5AH used only on single-ended supply rails feeding CAN transceivers. Use Value: Sub-1ps response captures fast ESD events before CAN PHY input stages saturate or latch up. |
| Industrial Sensor Interface Protection | Consumer Power Adapter Input Stage |
Use Scenario: Safeguarding analog sensor inputs (e.g., pressure, temperature) connected to 24V industrial buses. IC Role / Device Role / Timing Role: Standoff-rated TVS on VDD line upstream of LDO, absorbing switching noise from solenoid drivers. Use Value: 7.5V VWM allows compatibility with 5V/3.3V logic domains via local regulation while blocking normal operating voltage. | Use Scenario: Secondary-side DC input protection in wall adapters subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Final-stage TVS on regulated 5V/9V output rail before USB or charging circuitry. Use Value: 12.9V clamping ensures downstream USB-PD controllers and battery management ICs remain below absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5A | 600W rating, SMA package, higher RθJA (85°C/W), lower IPPM (32.4A) | Not suitable for ISO 7637-2 Pulse 1 or sustained 100A surges | Select SMCJ7.5AH where 1500W pulse handling and automotive qualification are mandatory |
| SMCJ7.5A | Same package and power rating, but non-AEC-Q101; lacks ISO 7637-2 validation and automotive traceability | Acceptable for commercial-grade industrial equipment but not automotive OEM designs | Choose SMCJ7.5AH when AEC-Q101 certification and full automotive test coverage are required |
Compared with SMAJ7.5A and SMCJ7.5A, the SMCJ7.5AH delivers verified automotive-grade surge immunity, tighter VBR tolerance, and guaranteed 100A clamping performance-making it the only option qualified for safety-critical 12V rail protection in production vehicles.
Availability
SMCJ7.5AH is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and consumer power adapter designs requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SMCJ7.5AH 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers with global automotive and industrial certifications.
The SMCJ series was developed specifically for high-energy transient suppression in harsh automotive environments, emphasizing AEC-Q101 reliability, ISO 7637-2 compliance, and robust thermal performance in surface-mount packages.
FAQ
What is the clamping voltage of the SMCJ7.5AH at its rated peak pulse current?
The SMCJ7.5AH has a maximum clamping voltage (VC) of 12.9 V at 100 A peak impulse current (IPPM), measured using the 10/1000 μs standard waveform per IEC 61000-4-5. This value ensures protected circuits remain within safe operating limits during surge events, and is confirmed in the Electrical Specifications table on page 3 of the official TSC datasheet revision A2102.
Is the SMCJ7.5AH suitable for bidirectional transient protection?
No, the SMCJ7.5AH is a unidirectional TVS diode intended for DC line protection with defined polarity. For bidirectional applications such as AC lines or differential buses, TSC offers the SMCJ7.5CAH variant. The "H" suffix in SMCJ7.5AH explicitly denotes unidirectional construction, and its cathode band marking confirms asymmetric terminal behavior.
Does the SMCJ7.5AH meet AEC-Q101 requirements for automotive use?
Yes, the SMCJ7.5AH is fully AEC-Q101 qualified, as stated in the FEATURES section of the TSC datasheet. This includes stress testing for temperature cycling, humidity bias, mechanical shock, and ESD-validating its suitability for under-hood and chassis-mounted automotive modules where reliability under thermal and vibration stress is critical.
What is the maximum steady-state power dissipation for the SMCJ7.5AH?
The SMCJ7.5AH has a steady-state power dissipation (PD) rating of 5 W at 25°C ambient temperature, as specified in the Absolute Maximum Ratings table. This value decreases linearly above 25°C per the Pulse Derating Curve (Fig.2), reaching zero at approximately 125°C ambient due to its RθJA of 55°C/W.
How does the SMCJ7.5AH differ from the SMCJ7.5H variant?
The SMCJ7.5AH has a tighter breakdown voltage tolerance (8.33–9.21 V) compared to SMCJ7.5H (8.33–10.30 V), resulting in more consistent clamping behavior. Both share identical package, power rating, and thermal specs, but the "A" grade provides improved VBR uniformity for designs requiring precise overvoltage thresholds, especially in safety-critical automotive subsystems.
SMCJ7.5AH 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):
- 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:
- 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)
SMCJ7.5AH FAQ
1.How can I place an order for SMCJ7.5AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.5AH 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 SMCJ7.5AH reliable?
The price and inventory of SMCJ7.5AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ7.5AH is usually 5 days.
3.What payment methods are accepted for SMCJ7.5AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.5AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.5AH?
SMCJ7.5AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.5AH 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 SMCJ7.5AH?
For technical support, including SMCJ7.5AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.5AH requirements.
6.How does Aetrix verify that SMCJ7.5AH is sourced from the original manufacturer or authorized distributors?
All SMCJ7.5AH 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 SMCJ7.5AH meets industry standards.
7.What is the process for return or replacement of SMCJ7.5AH?
All SMCJ7.5AH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.5AH, 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 SMCJ7.5AH part is unused and in its original packaging.
Return procedure for SMCJ7.5AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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