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Taiwan Semiconductor Corporation SMCJ75AH
- Part No.:
- SMCJ75AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ75AH.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
SMCJ75AH 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, 83.3–92.1V breakdown voltage at 1mA, 13A peak pulse current, and 121V maximum clamping voltage at rated surge-designed to protect automotive power rails and industrial I/O interfaces against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ75AH datasheet, SMCJ75AH pinout, SMCJ75AH application, or SMCJ75AH equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance values (RθJA = 55°C/W), moisture sensitivity level (MSL 1), and precise clamping behavior under 10/1000μs surge conditions.
Technical Context
The SMCJ75AH uses a glass-passivated silicon junction optimized for fast response (<1.0 ps rise from 0 V to VBR min) and low leakage (<1 μA at 75 V). Its unidirectional configuration enables integration into DC power lines where reverse polarity protection is not required.
It meets ISO 7637-2 immunity requirements for automotive electronics and supports steady-state power dissipation of 5 W at 25°C ambient, with junction temperature range from –55°C to +150°C and thermal resistance from junction-to-case of 10°C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for 12 V/24 V/48 V automotive systems. |
| VBR @ IT=1 mA | 83.3–92.1 V - Breakdown voltage range confirming robust overvoltage threshold with tight tolerance for reliable turn-on timing. |
| VC @ IPPM=13 A | 121 V - Clamping voltage under full 1500 W surge; limits downstream IC stress during load dump or inductive switching events. |
| PPK | 1500 W - Peak pulse power rating per 10/1000 μs waveform; validates capability to absorb high-energy transients without failure. |
| RθJA | 55 °C/W - Junction-to-ambient thermal resistance; determines required PCB copper area and airflow for thermal management in enclosed modules. |
| IR @ VWM | <1 μA - Reverse leakage at rated stand-off voltage; ensures minimal standby power loss and signal integrity in high-impedance circuits. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, polarity indicated by cathode band. Weight: 0.210 g. Meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; completes clamping path during positive transients on cathode side. |
| Cathode | Protected line input | Connected to the line being protected (e.g., battery feed); conducts surge current to anode when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing-enables use in engine control, body electronics, and ADAS modules. |
| Glass passivated junction | Ensures stable VBR and low leakage across lifetime; resists humidity-induced degradation in under-hood environments. |
| ISO 7637-2 compliance | Guarantees immunity to standardized automotive transients (Pulse 1, 2a, 2b, 3a, 3b), eliminating need for additional filtering in 12 V/24 V systems. |
| Fast response time | <1.0 ps from 0 V to VBR min-clamps before sensitive downstream circuitry (e.g., CAN transceivers, microcontrollers) experiences overvoltage damage. |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital I/O |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs from load dump and alternator ripple transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and system input filter to clamp surges above 75 V while remaining transparent during normal operation. Use Value: Limits peak voltage to 121 V at 13 A surge, preventing latch-up or gate oxide rupture in upstream DC-DC controllers and LDOs. | Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring induced transients and ESD. IC Role / Device Role / Timing Role: Standoff protector on each channel's optocoupler input side, absorbing fast-rising spikes before they reach isolation barrier. Use Value: Sub-1 μA leakage preserves input threshold accuracy; 121 V clamping ensures optocoupler CTR remains within spec during 1 kV/μs surges. |
| Telecom Power Interface | Motor Drive Control Board |
Use Scenario: Safeguarding PoE-powered Ethernet switch ports against lightning-induced surges on 48 V DC supply lines. IC Role / Device Role / Timing Role: Primary clamping device on midspan PSE output, coordinated with secondary GDT or MOV for staged energy handling. Use Value: 1500 W peak rating handles multi-kA induced currents; DO-214AB footprint allows dense layout near connector entry points. | Use Scenario: Protecting gate drivers and MCU GPIOs on motor control boards exposed to back-EMF from brushed DC or stepper motors. IC Role / Device Role / Timing Role: Localized TVS on each half-bridge driver supply rail to suppress inductive kickback during PWM switching transitions. Use Value: 13 A IPPM rating accommodates repetitive 10/1000 μs pulses from commutation noise; MSL 1 rating supports lead-free reflow without popcorn cracking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75A | Lower peak power (600 W), smaller SMB package (DO-214AA), higher RθJA (75°C/W) | Suitable only for lower-energy transients; limited thermal headroom in high-ambient industrial enclosures | Select when board space is constrained and surge energy does not exceed 600 W. |
| 1.5SMC75A | Same DO-214AB package and 1500 W rating, but not AEC-Q101 qualified; higher typical leakage (~2 μA) | Acceptable for commercial/industrial use but excluded from automotive BOMs requiring AEC-Q101 validation | Choose for cost-sensitive non-automotive designs where qualification is not mandated. |
Compared with SMBJ75A and 1.5SMC75A, the SMCJ75AH uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and MSL 1 reliability in DO-214AB-making it the preferred choice for automotive front-end protection where both performance and compliance are mandatory.
Availability
SMCJ75AH is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC digital I/O hardening, and telecom power interface surge suppression requiring stable component supply across extended production lifecycles.
Supply support for SMCJ75AH 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 high-reliability transient suppression in harsh automotive and industrial environments, emphasizing AEC-Q101 compliance, low clamping ratio, and robust thermal performance in surface-mount packages.
FAQ
What is the clamping voltage of the SMCJ75AH under maximum rated surge current?
The SMCJ75AH has a maximum clamping voltage (VC) of 121 V when subjected to its rated peak pulse current of 13 A (10/1000 μs waveform). This value is measured per ANSI/IEEE C62.35 and guarantees that downstream circuitry sees no more than 121 V during worst-case transient events, making SMCJ75AH suitable for protecting 75 V-rated systems with safety margin.
Is the SMCJ75AH unidirectional or bidirectional, and how is polarity marked?
The SMCJ75AH is a unidirectional TVS diode, with polarity indicated by a cathode band on the DO-214AB package body. The cathode terminal connects to the line being protected (e.g., battery rail), while the anode connects to ground. Bidirectional variants use "CH" or "CAH" suffixes; SMCJ75AH is explicitly unidirectional per TSC documentation and marking code GGR.
Does the SMCJ75AH meet automotive qualification standards?
Yes, the SMCJ75AH is AEC-Q101 qualified and tested for automotive-grade reliability-including temperature cycling, highly accelerated life testing (HALT), and ESD robustness. It also meets ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity requirements, confirming suitability for engine control units, body control modules, and ADAS sensors where SMCJ75AH is deployed in production vehicles.
What is the maximum steady-state power dissipation for the SMCJ75AH at 25°C ambient?
The SMCJ75AH has a steady-state power dissipation (PD) rating of 5 W at TA = 25°C, derated linearly above that temperature per the pulse derating curve (Fig.2). This value reflects continuous DC power handling capability-not surge rating-and informs thermal design when SMCJ75AH is used in high-temperature enclosures or adjacent to heat-generating components.
How does the SMCJ75AH compare to the SMCJ75H variant?
The SMCJ75AH offers tighter breakdown voltage tolerance (83.3–92.1 V) versus SMCJ75H (83.3–102 V), resulting in more predictable clamping onset and reduced risk of premature conduction. Both share identical package, power rating, and AEC-Q101 qualification, but SMCJ75AH's narrower VBR range improves design margin in precision 75 V protection schemes where SMCJ75AH replaces SMCJ75H in new automotive designs.
SMCJ75AH 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:
- 121V
- Current - Peak Pulse (10/1000µs):
- 13A
- 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)
SMCJ75AH FAQ
1.How can I place an order for SMCJ75AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ75AH 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 SMCJ75AH reliable?
The price and inventory of SMCJ75AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ75AH is usually 5 days.
3.What payment methods are accepted for SMCJ75AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ75AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ75AH?
SMCJ75AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ75AH 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 SMCJ75AH?
For technical support, including SMCJ75AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ75AH requirements.
6.How does Aetrix verify that SMCJ75AH is sourced from the original manufacturer or authorized distributors?
All SMCJ75AH 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 SMCJ75AH meets industry standards.
7.What is the process for return or replacement of SMCJ75AH?
All SMCJ75AH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ75AH, 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 SMCJ75AH part is unused and in its original packaging.
Return procedure for SMCJ75AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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