My Inquiry
My Account
Taiwan Semiconductor Corporation SMCJ75CA
;;2.jpg)
- Part No.:
- SMCJ75CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ75CA.pdf
- Description:
- TVS DIODE 75VWM 121VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,444
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ75CA from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor in DO-214AB (SMC) package, with 75V working stand-off voltage, 83.3–92.1V breakdown voltage at 1mA test current, and 121V maximum clamping voltage at 13A peak impulse current. It protects automotive power electronics and industrial control inputs against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ75CA datasheet, SMCJ75CA pinout, SMCJ75CA application, or SMCJ75CA equivalent, key selection criteria include bidirectional clamping capability, 121V VC@13A performance, DO-214AB thermal resistance (RθJA = 55°C/W), and compliance with IEC 61249-2-21 halogen-free and J-STD-020 Level 1 moisture sensitivity requirements.
Technical Context
The SMCJ75CA uses a glass passivated silicon junction to achieve fast response (<1.0 ps from 0 V to VBR min) and low leakage (<1 µA at 75 V). Its bidirectional configuration enables symmetrical clamping in both polarities without external circuitry, meeting ISO 7637-2 immunity requirements for automotive load-dump and inductive switching events.
Thermally, it supports continuous operation up to TJ = 150°C with RθJC = 10°C/W and RθJA = 55°C/W. The device sustains 200A non-repetitive forward surge (IFSM) and delivers 1500W peak pulse power under 1 ms 10/1000 µs waveform per Fig.5.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum DC or continuous AC reverse voltage before clamping initiates |
| VBR min/max | 83.3 V / 92.1 V @ IT = 1 mA - Ensures reliable turn-on margin above VWM with tight manufacturing tolerance |
| VC @ IPPM | 121 V @ 13 A - Clamped voltage during worst-case 10/1000 µs transient; defines protected circuit's max overvoltage stress |
| PPK | 1500 W - Peak pulse power handling per single 1 ms transient; validates robustness against ISO 7637-2 Pulse 3b |
| IR @ VWM | <1 µA - Negligible leakage at operating voltage; avoids signal integrity degradation in high-impedance sensing nodes |
| TJ max | +150 °C - Enables use in under-hood automotive environments and enclosed industrial enclosures without derating |
| Package | DO-214AB (SMC) - Surface-mount outline with 55°C/W junction-to-ambient thermal resistance and J-STD-002 solderability |
Pinout & Package
DO-214AB (SMC) surface-mount package with cathode band marking for polarity identification; bidirectional operation means both terminals are functionally symmetric-no dedicated anode/cathode assignment required in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Transient voltage clamp node | Connected across protected line and ground (or rail); conducts during overvoltage to limit voltage excursion |
| Terminal 2 | Transient voltage clamp node | Second terminal of bidirectional TVS; completes clamping path in either polarity; no polarity dependency in PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect/load dump), and Pulse 3a/3b (ESD/EFB coupling) |
| Fast response time | <1.0 ps rise from 0 V to VBR min - limits voltage overshoot before protection engages |
| Glass passivated junction | Stable VBR and low IR over temperature and lifetime; eliminates risk of junction corrosion in humid environments |
| Halogen-free construction | Meets IEC 61249-2-21 - supports RoHS-compliant manufacturing and end-of-life recycling requirements |
| J-STD-020 Level 1 MSL | No floor life limitation; allows unlimited storage and standard reflow without baking preconditioning |
Applications
| Automotive Power Input Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: 12 V battery-fed ECU power input subjected to load-dump transients up to 35 V and ISO 7637-2 Pulse 2b. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed between VIN and GND to shunt energy before LDO or DC-DC converter input stage. Use Value: Limits clamped voltage to ≤121 V during 13 A transient, preventing damage to downstream 36 V-rated input capacitors and regulators. | Use Scenario: 24 V digital input channel on programmable logic controller exposed to inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: Line-side transient suppressor connected across input terminal and common rail to absorb switching spikes. Use Value: Withstands 1500 W peak pulses and clamps to 121 V, protecting optocoupler input and microcontroller GPIO from >1 kV transients. |
| LED Driver Surge Protection | Telecom Power Interface Protection |
Use Scenario: Constant-current LED driver board powered from 48 V telecom supply, subject to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary-level TVS mounted at board edge to clamp differential-mode surges before DC-DC stage. Use Value: 121 V clamping voltage ensures MOSFET gate drivers and current-sense amplifiers remain within safe operating area during 10/1000 µs events. | Use Scenario: -48 V DC power interface on telecom base station card receiving induced surges from nearby RF equipment or grounding faults. IC Role / Device Role / Timing Role: Bidirectional clamp across power rail and return to suppress both positive and negative polarity transients. Use Value: Symmetrical clamping behavior eliminates need for dual unidirectional devices; reduces BOM count and PCB area by 50% vs. discrete solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75CA (Bourns) | Same 75 V VWM and 121 V VC@13 A, but lower PPK = 600 W and SMB package (RθJA = 70°C/W) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 1 or 2b without derating | Select when space-constrained layouts require smaller footprint and transient energy is ≤600 W |
| P6SMB75CA (Littelfuse) | Identical electrical specs (VWM = 75 V, VC = 121 V @ 13 A, PPK = 1500 W), same DO-214AB package | Direct functional match; validated for identical ISO 7637-2 pulse classes and automotive qualification | Drop-in alternative with identical thermal and clamping performance; preferred for second-source assurance |
Compared with SMBJ75CA, SMCJ75CA delivers 2.5× higher peak power and superior thermal dissipation; versus P6SMB75CA, it offers identical protection capability but differs in manufacturer-specific qualification testing and traceability documentation.
Availability
SMCJ75CA is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, LED driver power stages, and telecom power interfaces requiring stable component supply and full ISO 7637-2 compliance.
Supply support for SMCJ75CA 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, and power MOSFETs since 1979.
The SMCJ series was designed specifically for high-energy transient suppression in automotive and industrial power systems, targeting ISO 7637-2 compliance and extended temperature operation without derating.
FAQ
What does the 'CA' suffix indicate in SMCJ75CA?
The 'CA' suffix in SMCJ75CA denotes a bidirectional configuration - meaning the device provides symmetrical transient voltage clamping in both polarities. Unlike unidirectional variants (e.g., SMCJ75A), SMCJ75CA has no designated anode or cathode and functions identically regardless of voltage polarity applied across its terminals. This makes SMCJ75CA ideal for AC-coupled lines or DC rails where reverse transients may occur. All electrical specifications in the datasheet apply equally in both directions.
How does SMCJ75CA compare to SMCJ75A in terms of clamping performance?
SMCJ75CA and SMCJ75A share identical VWM (75 V), VBR (83.3–92.1 V), and VC (121 V @ 13 A) ratings, but differ in polarity behavior: SMCJ75A is unidirectional and requires correct orientation relative to circuit polarity, while SMCJ75CA operates bidirectionally without orientation constraints. Both deliver 1500 W peak power, but SMCJ75CA eliminates risk of misplacement during automated assembly and simplifies layout for differential or floating-rail protection schemes.
Is SMCJ75CA compliant with automotive qualification standards?
Yes, SMCJ75CA meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for automotive transient immunity, and is rated for operation from –55°C to +150°C junction temperature. While not AEC-Q200 certified out-of-box, its construction (glass passivated junction, J-STD-020 Level 1 MSL, halogen-free materials) and tested performance align with AEC-Q200 stress categories for TVS diodes. Customers requiring formal qualification should consult Taiwan Semiconductor's AEC-Q200 test reports for the SMCJ family.
What is the maximum peak impulse current SMCJ75CA can handle?
SMCJ75CA is rated for a maximum peak impulse current (IPPM) of 13 A under the standardized 10/1000 µs double-exponential waveform defined in Fig.5 of the datasheet. This corresponds to its 1500 W peak pulse power rating at 25°C ambient. At elevated temperatures, IPPM must be derated per Fig.2 - e.g., at TA = 85°C, IPPM reduces to approximately 9.5 A to maintain safe junction temperature.
Can SMCJ75CA be used in place of a unidirectional TVS in a DC power rail?
Yes, SMCJ75CA can replace a unidirectional TVS (e.g., SMCJ75A) on a DC power rail without circuit modification, though it offers no performance advantage in strictly unidirectional applications. Its bidirectional nature ensures protection against both positive overvoltages and negative-going transients (e.g., reverse battery connection or inductive flyback reversal), adding robustness at no penalty in size or cost. Layout remains identical since DO-214AB mechanical outline and terminal spacing are unchanged.
SMCJ75CA 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:
- -
- Bidirectional Channels:
- 2
- Voltage - Reverse Standoff (Typ):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 12.4A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ75CA FAQ
1.How can I place an order for SMCJ75CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ75CA 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 SMCJ75CA reliable?
The price and inventory of SMCJ75CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ75CA is usually 5 days.
3.What payment methods are accepted for SMCJ75CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ75CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ75CA?
SMCJ75CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ75CA 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 SMCJ75CA?
For technical support, including SMCJ75CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ75CA requirements.
6.How does Aetrix verify that SMCJ75CA is sourced from the original manufacturer or authorized distributors?
All SMCJ75CA 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 SMCJ75CA meets industry standards.
7.What is the process for return or replacement of SMCJ75CA?
All SMCJ75CA units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ75CA, 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 SMCJ75CA part is unused and in its original packaging.
Return procedure for SMCJ75CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ75CA Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
