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Taiwan Semiconductor Corporation SMCJ7.5H
- Part No.:
- SMCJ7.5H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.5H.pdf
- Description:
- 1500W, 9.3V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,463
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Product details
Overview
SMCJ7.5H from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 8.33V minimum breakdown voltage, 10.30V maximum breakdown voltage at 1mA test current, and 14.3V clamping voltage at 100A peak pulse current. It protects automotive and industrial power rails against ESD, load dump, and ISO 7637-2 transients.
For engineers reviewing the SMCJ7.5H datasheet, SMCJ7.5H pinout, SMCJ7.5H application, or SMCJ7.5H equivalent, key selection criteria include clamping voltage margin versus system rail, unidirectional polarity for DC-biased lines, AEC-Q101 qualification for automotive use, and thermal derating above 25°C ambient.
Technical Context
The SMCJ7.5H operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (8.33–10.30V). Its glass-passivated junction ensures stable breakdown and low leakage (<1µA at 7.5V), while fast response (<1.0ps) enables suppression of sub-nanosecond ESD events per IEC 61000-4-2.
Designed for automotive-grade reliability, it meets AEC-Q101 stress tests and ISO 7637-2 Pulse 1/2a/2b/3a/3b waveforms. Thermal performance is defined by RθJA = 55°C/W and RθJC = 10°C/W, supporting operation up to TJ = +150°C with appropriate PCB copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 8.33 V / 10.30 V at IT = 1 mA - Ensures reliable triggering above nominal rail with margin for tolerance and drift |
| VC @ IPPM | 14.3 V at 100 A, 10/1000 µs waveform - Limits transient overvoltage seen by downstream ICs on 12 V systems |
| PPK | 1500 W - Peak pulse power handling capability for short-duration transients per Fig.5 |
| IR @ VWM | <1 µA - Negligible leakage current preserves battery life and signal integrity in always-on circuits |
| TJ max | +150 °C - Enables placement near heat sources in engine control units and power modules |
Pinout & Package
DO-214AB (SMC) surface-mount package with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance; weight ≈ 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground or low-side return path; defines unidirectional conduction direction |
| Cathode | Protected line terminal | Connected to the line being protected (e.g., 12 V supply); conducts during overvoltage to shunt energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood applications including temperature cycling, humidity bias, and mechanical shock |
| Glass passivated junction | Stable VBR over lifetime and improved resistance to moisture-induced degradation |
| ISO 7637-2 compliance | Withstands standardized automotive transients including load dump (Pulse 5a/b), switch-off spikes (Pulse 2b), and coupling noise (Pulse 3a/b) |
| Fast response time | <1.0 ps rise time ensures clamping activation before sensitive logic or analog circuitry sustains damage |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input |
|---|---|
Use Scenario: Protecting 12 V power input of BCM microcontroller and CAN transceivers from alternator load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between fused 12 V rail and local decoupling capacitor, clamping transients before they reach LDOs and communication ICs. Use Value: Limits clamped voltage to 14.3 V, maintaining safe margin below 16 V absolute maximum ratings of common automotive MCUs and transceivers. | Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers against field-wiring induced surges and ESD during maintenance. IC Role / Device Role / Timing Role: Primary front-end protection device on each isolated input channel, mounted directly at connector entry point. Use Value: 1500 W peak power rating absorbs multiple 1 kV/500 A surge events without degradation, extending field service life. |
| Telecom Power Supply Interface | Consumer Appliance Motor Drive |
Use Scenario: Shielding AC/DC adapter output stage from lightning-induced surges entering via PoE or auxiliary DC inputs in base station equipment. IC Role / Device Role / Timing Role: Secondary-level TVS on regulated 12 V or 5 V distribution bus, coordinated with upstream MOVs and gas discharge tubes. Use Value: Low clamping ratio (VC/VBR ≈ 1.45) minimizes voltage overshoot during fast-rising transients, preserving downstream DC-DC converter stability. | Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines and HVAC blowers connected to 12 V control boards. IC Role / Device Role / Timing Role: Bidirectional-capable variant not used; SMCJ7.5H serves unidirectional clamp on motor supply rail referenced to chassis ground. Use Value: 100 A peak impulse current rating handles repetitive 50–100 A inductive kick events without parametric shift or thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC7.5 | Same DO-214AB package, 7.5 V VWM, but lower PPK = 600 W and higher VC = 15.0 V at 40 A | Not suitable for ISO 7637-2 Pulse 5a (load dump); limited to lower-energy transients | Select SMCJ7.5H where full 1500 W surge immunity and AEC-Q101 qualification are required. |
| 1.5KE7.5A | Through-hole DO-201 package, same VWM/VBR, but slower response (>1 ns) and no AEC-Q101 or ISO 7637-2 validation | Requires manual assembly; unsuitable for automated SMT lines or automotive qualification programs | Choose SMCJ7.5H for surface-mount production, automotive compliance, and faster clamping performance. |
Compared with SAC7.5 and 1.5KE7.5A, the SMCJ7.5H delivers higher surge robustness, automotive-grade reliability, and SMT compatibility-making it the preferred choice for modern 12 V automotive and industrial control designs requiring certified transient immunity.
Availability
SMCJ7.5H is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC interfaces, telecom power supplies, and consumer appliance motor controls requiring stable component supply across high-volume production cycles.
Supply support for SMCJ7.5H 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, rectifiers, and MOSFETs for automotive, industrial, and computing markets.
The SMCJ series was developed specifically for high-reliability transient suppression in automotive power networks and industrial control systems, emphasizing AEC-Q101 compliance, ISO 7637-2 immunity, and robust thermal performance in compact SMC packages.
FAQ
What is the polarity configuration of the SMCJ7.5H?
The SMCJ7.5H is a unidirectional TVS diode, meaning it conducts only in reverse bias above its breakdown voltage. The cathode band marks the protected line terminal, and the anode connects to ground. This configuration is intended for DC-biased circuits like automotive 12 V supplies where polarity is fixed and reverse conduction must be blocked during normal operation. The SMCJ7.5H does not conduct in forward direction beyond typical silicon diode drop (~3.5 V).
Does the SMCJ7.5H meet AEC-Q101 requirements for automotive use?
Yes, the SMCJ7.5H is explicitly qualified to AEC-Q101 standards, including stress tests for temperature cycling, high-temperature operating life, unbiased highly accelerated stress testing (uHAST), and mechanical shock. This qualification confirms its suitability for under-hood and cabin applications in passenger vehicles and commercial vehicles where reliability under thermal and vibration stress is critical. Documentation is provided in Taiwan Semiconductor's A2102 revision release.
What is the maximum clamping voltage of the SMCJ7.5H and under what test condition?
The SMCJ7.5H has a maximum clamping voltage (VC) of 14.3 V, measured at a peak pulse current (IPPM) of 100 A using the standard 10/1000 µs double-exponential waveform per Fig.5 in the datasheet. This value represents the worst-case voltage imposed on the protected line during a full-rated transient event and is guaranteed across the operating temperature range and production lot.
Can the SMCJ7.5H be used in bidirectional configurations?
No, the SMCJ7.5H is strictly unidirectional. For bidirectional transient suppression-such as on AC lines or data buses with no DC bias-Taiwan Semiconductor offers the SMCJ7.5CH or SMCJ7.5CAH variants, which feature symmetrical breakdown in both directions. Using the SMCJ7.5H in a bidirectional arrangement would result in forward conduction and potential failure during negative transients.
How does the SMCJ7.5H compare to the SMCJ7.5AH variant?
The SMCJ7.5AH differs from the SMCJ7.5H in tighter breakdown voltage tolerance: SMCJ7.5H specifies VBR = 8.33–10.30 V, while SMCJ7.5AH narrows this to 8.33–9.21 V. Both share identical VWM (7.5 V), VC (14.3 V / 12.9 V respectively), and packaging. The SMCJ7.5AH is preferred where precise clamping threshold is needed, such as in systems with narrow voltage margins; otherwise, the SMCJ7.5H provides broader design flexibility at standard cost.
SMCJ7.5H 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:
- 14.3V
- Current - Peak Pulse (10/1000µs):
- 110A
- 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)
SMCJ7.5H FAQ
1.How can I place an order for SMCJ7.5H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.5H 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 SMCJ7.5H reliable?
The price and inventory of SMCJ7.5H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ7.5H is usually 5 days.
3.What payment methods are accepted for SMCJ7.5H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.5H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.5H?
SMCJ7.5H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.5H 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 SMCJ7.5H?
For technical support, including SMCJ7.5H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.5H requirements.
6.How does Aetrix verify that SMCJ7.5H is sourced from the original manufacturer or authorized distributors?
All SMCJ7.5H 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 SMCJ7.5H meets industry standards.
7.What is the process for return or replacement of SMCJ7.5H?
All SMCJ7.5H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.5H, 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 SMCJ7.5H part is unused and in its original packaging.
Return procedure for SMCJ7.5H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.5H Tags
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