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Taiwan Semiconductor Corporation SMCJ75H
- Part No.:
- SMCJ75H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ75H.pdf
- Description:
- 1500W, 92.7V, 10%, UNIDIRECTIONA
- Quantity:
- Payment:
- Shipping:
Inventory:3,990
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Product details
Overview
SMCJ75H from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 75V working stand-off voltage (VWM), 83.3–102V breakdown voltage (VBR), and 134V maximum clamping voltage (VC) at 11.7A peak pulse current. It delivers AEC-Q101 qualification and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and ESD protection.
For engineers reviewing the SMCJ75H datasheet, SMCJ75H pinout, SMCJ75H application, or SMCJ75H equivalent, this device is selected for robust overvoltage immunity in 12V/24V automotive power rails, industrial I/O interfaces, and telecom DC power inputs where fast response (<1.0 ps), low leakage (<1 µA @ 75V), and high surge capability are critical.
Technical Context
The SMCJ75H employs a glass-passivated silicon junction optimized for unidirectional transient suppression. Its clamping behavior is defined by a 10/1000 µs waveform per REA standards, with thermal resistance RθJA = 55°C/W and RθJC = 10°C/W enabling reliable operation up to TJ = +150°C.
It supports automated placement and complies with J-STD-020 Level 1 moisture sensitivity, JESD 201 Class 2 whisker resistance, and RoHS/halogen-free requirements. Polarity is marked by cathode band; VF = 5.0 V @ 100 A forward surge applies to all SMCJ100H–SMCJ170H variants - but not SMCJ75H (VF = 3.5 V per Note 2).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping initiates; sets system-level DC rail margin for 24V automotive and industrial supplies. |
| VBR min/max | 83.3 V / 102 V @ IT = 1 mA - Confirmed breakdown range ensures predictable turn-on under transients without premature conduction during normal operation. |
| VC @ IPPM | 134 V @ 11.7 A - Clamping voltage defines worst-case voltage seen by protected ICs during a 10/1000 µs surge; limits downstream stress. |
| PPK | 1500 W - Peak pulse power rating determines survivability against standardized load-dump and lightning-induced surges per ISO 7637-2. |
| IR @ VWM | <1 µA - Ultra-low reverse leakage preserves battery life and signal integrity in always-on circuits such as CAN bus nodes or sensor front-ends. |
| TJ max | +150 °C - Junction temperature limit enables use in under-hood automotive modules and high-ambient industrial enclosures without derating. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, polarity indicated by cathode band. Weight: 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line (e.g., 24V rail); conducts surge energy to ground when voltage exceeds VBR. |
| Anode | Reference node | Typically tied to system ground; completes clamping path and establishes reference for VWM/VBR specification. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for powertrain and body electronics. |
| ISO 7637-2 compliance | Explicitly rated for Pulse 1 (inductive switch-off), Pulse 2a/2b (load dump), and Pulse 3a/3b (capacitive coupling) - eliminates need for additional validation. |
| Glass passivated junction | Ensures stable VBR over lifetime and improved humidity resistance vs. epoxy-passivated alternatives - critical for under-hood applications. |
| Fast response time | <1.0 ps rise time from 0 V to VBR min - clamps before sensitive downstream logic or analog circuitry can be damaged. |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 24V supply lines in engine control units (ECUs) and body control modules (BCMs) against load-dump transients up to ±120 V. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery rail and local regulator input to clamp surges before LDO or DC-DC stage. Use Value: With 134 V clamping at 11.7 A, SMCJ75H holds downstream voltage below 135 V - within safe operating area of 16V-input regulators and microcontrollers. |
Use Scenario: Shielding 24V digital input channels on programmable logic controllers (PLCs) from field-wiring induced surges and ESD events. IC Role / Device Role / Timing Role: Front-end transient suppressor on each isolated input channel, mounted directly at connector entry point. Use Value: Sub-1 µA leakage at 75 V prevents false triggering of optocoupler-based input stages; DO-214AB footprint allows dense PCB layout. |
| Telecom DC Power Interface | Motor Drive Control Signal Protection |
Use Scenario: Safeguarding -48 V or +24 V DC power feeds in base station remote radio units (RRUs) and optical line terminals (OLTs) against lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main DC input, coordinated with upstream fuses and secondary filtering. Use Value: 1500 W PPK rating sustains multiple 10/1000 µs surges per IEC 61000-4-5 Level 4, while 55°C/W RθJA supports natural convection cooling in sealed enclosures. |
Use Scenario: Protecting gate-drive signals (e.g., PWM inputs to half-bridge drivers) in HVAC and industrial motor inverters from cross-talk and switching noise. IC Role / Device Role / Timing Role: Bidirectional clamping (using SMCJ75AH variant) across differential control lines; SMCJ75H used for single-ended bias rail protection. Use Value: 11.7 A IPPM capacity handles repetitive commutation spikes; 83.3–102 V VBR range avoids false triggering during 24 V logic 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 |
|---|---|---|---|
| Littelfuse SMAJ75A | Same DO-214AC (SMA) package; lower PPK (400 W); VBR = 83.3–92.1 V; VC = 121 V @ 13 A. | Lower surge rating suits cost-sensitive consumer electronics; not AEC-Q101 qualified or ISO 7637-2 tested. | Select SMAJ75A only for non-automotive, low-energy transient environments where 400 W suffices. |
| ON Semiconductor 1.5SMC75A | DO-214AB (SMC) package; PPK = 1500 W; VBR = 83.3–92.1 V; VC = 121 V @ 13 A; AEC-Q101 qualified. | Identical form factor and rating; differs in thermal resistance (RθJA = 60°C/W vs. 55°C/W) and moisture sensitivity (Level 2 vs. Level 1). | 1.5SMC75A is viable for space-constrained designs but requires tighter humidity control during assembly due to J-STD-020 Level 2. |
Compared with SMCJ75H, SMAJ75A offers lower cost and smaller footprint but insufficient surge handling for automotive load-dump; 1.5SMC75A matches key ratings but imposes stricter assembly controls and slightly higher thermal impedance - making SMCJ75H preferable for high-reliability, high-ambient automotive and industrial deployments.
Availability
SMCJ75H is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, and telecom power interfaces requiring stable component supply, AEC-Q101 compliance, and ISO 7637-2 validated surge immunity.
Supply support for SMCJ75H 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-energy transient suppression in harsh-environment applications, emphasizing AEC-Q101 reliability, ISO 7637-2 compliance, and surface-mount manufacturability.
FAQ
What is the clamping voltage of SMCJ75H and how is it measured?
The SMCJ75H has a maximum clamping voltage (VC) of 134 V, measured at 11.7 A peak pulse current (IPPM) using a 10/1000 µs waveform per REA standards. This value represents the highest voltage that appears across the SMCJ75H during a standardized surge event, ensuring downstream components remain within safe operating limits. The test condition is explicitly defined in the datasheet's Electrical Specifications table.
Is SMCJ75H suitable for bidirectional transient protection?
No - SMCJ75H is a unidirectional TVS diode intended for DC line protection with defined polarity (cathode band). For bidirectional applications such as AC lines or differential data buses, the SMCJ75AH variant must be used. The "H" suffix alone indicates unidirectional configuration; bidirectional types require "AH" or "CH" suffixes per the ordering information section.
Does SMCJ75H meet automotive qualification standards?
Yes - SMCJ75H is AEC-Q101 qualified and explicitly tested to ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b. These qualifications confirm its suitability for automotive power net applications including engine control, body electronics, and infotainment systems exposed to load-dump and inductive switching transients.
What is the forward voltage drop of SMCJ75H during surge conduction?
The SMCJ75H has a forward voltage (VF) of 3.5 V at 100 A forward surge current, as specified in Note 2 of the Absolute Maximum Ratings table. This applies to all SMCJ5.0H through SMCJ90H devices. The 3.5 V VF defines the voltage drop during high-current unidirectional conduction, impacting power dissipation and thermal design during sustained surge events.
How does the SMCJ75H package compare to SMAJ or SMBJ series in terms of power handling?
The SMCJ75H uses the DO-214AB (SMC) package, which provides higher thermal mass and lower RθJA (55°C/W) than DO-214AC (SMA, ~70°C/W) or DO-214AA (SMB, ~85°C/W). This enables the SMCJ75H to sustain its full 1500 W peak power rating more effectively than SMAJ75A (400 W) or SMBJ75A (600 W), especially in natural-convection environments.
SMCJ75H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMCJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 134V
- Current - Peak Pulse (10/1000µs):
- 11.7A
- 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)
SMCJ75H FAQ
1.How can I place an order for SMCJ75H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ75H 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 SMCJ75H reliable?
The price and inventory of SMCJ75H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ75H is usually 5 days.
3.What payment methods are accepted for SMCJ75H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ75H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ75H?
SMCJ75H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ75H 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 SMCJ75H?
For technical support, including SMCJ75H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ75H requirements.
6.How does Aetrix verify that SMCJ75H is sourced from the original manufacturer or authorized distributors?
All SMCJ75H 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 SMCJ75H meets industry standards.
7.What is the process for return or replacement of SMCJ75H?
All SMCJ75H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ75H, 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 SMCJ75H part is unused and in its original packaging.
Return procedure for SMCJ75H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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