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Taiwan Semiconductor Corporation SMCJ64CH
- Part No.:
- SMCJ64CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ64CH.pdf
- Description:
- 1500W, 79V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,141
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Product details
Overview
SMCJ64CH from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 64V working stand-off voltage (VWM), 71.1–86.9V breakdown voltage (VBR), and 114V maximum clamping voltage (VC) at 13.8A peak pulse current - designed for automotive-grade ESD and load-dump protection in power supply rails and CAN/LIN interfaces.
For engineers reviewing the SMCJ64CH datasheet, SMCJ64CH pinout, SMCJ64CH application, or SMCJ64CH equivalent, this device delivers AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1ps response time, <1µA reverse leakage above 10V, and glass-passivated junction reliability in high-vibration environments.
Technical Context
The SMCJ64CH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (71.1–86.9V at 1mA test current), clamping transients to ≤114V at 13.8A (10/1000µs waveform). Its DO-214AB package provides low thermal resistance (RθJC = 10°C/W) and supports automated placement per J-STD-002 solderability standards.
It meets AEC-Q101 stress requirements including temperature cycling, humidity bias, and mechanical shock, and complies with ISO 7637-2 for automotive electrical disturbances - enabling direct integration into 12V/24V vehicle subsystems without external conditioning circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous reverse operating voltage before clamping begins; sets system rail margin for 12V/24V automotive applications. |
| VBR min/max | 71.1 V / 86.9 V @ 1 mA - Confirmed breakdown threshold range; ensures reliable triggering across process and temperature variation. |
| VC @ IPPM | 114 V @ 13.8 A (10/1000µs) - Clamped voltage during worst-case surge; determines protected IC's voltage withstand requirement. |
| PPK | 1500 W - Peak pulse power handling capability; supports ISO 7637-2 Pulse 5a (load dump) energy absorption. |
| IR @ VWM | <1 µA - Ultra-low reverse leakage at rated stand-off; minimizes standby power loss in always-on modules. |
| TJ max | +150 °C - Maximum junction temperature rating; enables operation in under-hood environments with minimal derating. |
| RθJA | 55 °C/W - Junction-to-ambient thermal resistance; informs PCB copper area requirements for sustained 5W steady-state dissipation. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, single-diode configuration, cathode indicated by band marking. Weight: 0.210 g. Moisture sensitivity level: J-STD-020 Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; defines clamping reference point for unidirectional suppression. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., battery rail, CAN_H); conducts avalanche current during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use across temperature, humidity, and mechanical stress tests - eliminates need for additional qualification effort. |
| ISO 7637-2 compliant | Meets Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnection), and Pulse 3a/3b (capacitive coupling) - covers full automotive transient spectrum. |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives - critical for under-hood reliability. |
| Sub-1 ps response time | Clamps transients before sensitive downstream ICs experience overstress - protects high-speed CAN, LIN, and sensor interfaces. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS directives - supports global environmental compliance without material substitution risk. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 12V supply inputs of BCM microcontrollers and driver ICs against load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS clamp on main battery rail, placed upstream of DC-DC converters and LDOs. Use Value: Limits transient voltage to ≤114V, ensuring downstream 16V-rated regulators remain within safe operating area during 35V/100ms load dump events. |
Use Scenario: Safeguarding 24V digital input channels of programmable logic controllers against field-wiring induced transients. IC Role / Device Role / Timing Role: Primary surge suppression element at terminal block entry, before optocoupler or Schmitt-trigger input stage. Use Value: Absorbs up to 1500W peak energy while maintaining <1µA leakage - preserves input threshold accuracy and reduces false triggering. |
| Automotive Infotainment Power Rail | Telecom PoE Midspan Surge Protection |
Use Scenario: Securing 5V/3.3V power domains of head unit SoCs and audio codecs against coupled transients from adjacent RF or motor circuits. IC Role / Device Role / Timing Role: Secondary-level TVS on post-regulation rails, coordinated with primary front-end SMCJ64CH on 12V input. Use Value: Fast sub-1ps response prevents latch-up in CMOS-based processors during fast-rising ESD events on shared ground planes. |
Use Scenario: Protecting Ethernet PHY interface power pins (e.g., +48V PSE output) in midspan PoE injectors from lightning-induced surges. IC Role / Device Role / Timing Role: High-power unidirectional clamp on DC power pair, placed after isolation transformer but before DC-DC controller. Use Value: 1500W rating handles IEC 61000-4-5 Combination Wave (1.2/50µs + 8/20µs) surges up to 4kV without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ64A | Lower PPK (400W), SMA package (smaller footprint, higher RθJA = 95°C/W), same VWM/VBR range. | Not suitable for ISO 7637-2 Pulse 5a (load dump); limited to lower-energy ESD and switching noise. | Select only for space-constrained consumer electronics where 1500W surge immunity is not required. |
| TPSMD64A | Same PPK (1500W), DO-214AB package, but AEC-Q101 not claimed; typical IR = 2.5µA @ VWM (vs. <1µA for SMCJ64CH). | Lacks formal automotive qualification; may require additional validation for Tier 1 automotive programs. | Acceptable for industrial or commercial systems where AEC-Q101 is not mandated and slightly higher leakage is tolerable. |
Compared with SMAJ64A and TPSMD64A, the SMCJ64CH uniquely combines AEC-Q101 qualification, <1µA leakage, and full ISO 7637-2 compliance in a standard DO-214AB footprint - making it the preferred choice for production automotive ECUs requiring zero-derating surge robustness.
Availability
SMCJ64CH is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input stages, infotainment power domains, and telecom PoE midspan designs requiring stable component supply with full AEC-Q101 traceability and ISO 7637-2 compliance.
Supply support for SMCJ64CH 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 since 1979.
The SMCJ64CH belongs to TSC's AEC-Q101-qualified SMCJ-H series, engineered specifically for automotive and industrial transient suppression - emphasizing high-reliability glass passivation, tight VBR tolerance, and full ISO 7637-2 pulse coverage.
FAQ
What is the polarity configuration of the SMCJ64CH?
The SMCJ64CH is a unidirectional TVS diode, configured with anode and cathode terminals - the cathode is marked by a band on the DO-214AB package. It conducts only during reverse overvoltage events, making it ideal for protecting positive supply rails referenced to ground. Unlike bidirectional variants (e.g., SMCJ64CH), the SMCJ64CH does not conduct in forward bias beyond its ~3.5V forward voltage drop. This polarity ensures precise clamping behavior in DC-coupled automotive and industrial power systems.
Does the SMCJ64CH meet AEC-Q101 requirements for automotive use?
Yes, the SMCJ64CH is explicitly AEC-Q101 qualified per the manufacturer's documentation, covering stress tests including 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-mounted automotive ECUs without additional component-level qualification. The SMCJ64CH also meets ISO 7637-2 Pulse 1/2a/2b/3a/3b, reinforcing its readiness for production vehicle deployment.
What is the maximum clamping voltage of the SMCJ64CH and how is it measured?
The SMCJ64CH has a maximum clamping voltage (VC) of 114 V, measured at a peak pulse current (IPPM) of 13.8 A using the standardized 10/1000 µs double-exponential waveform per IEC 61000-4-5. This value represents the upper limit of voltage seen by downstream circuitry during worst-case surge events. It is guaranteed across temperature and process variation, and directly determines the minimum voltage rating required for protected ICs - for example, ensuring 16V-rated regulators remain within safe operating limits during load dump.
How does the SMCJ64CH compare to the SMCJ64AH variant?
The SMCJ64AH differs from the SMCJ64CH in breakdown voltage tightness: SMCJ64CH specifies VBR min/max = 71.1–86.9 V, while SMCJ64AH narrows this to 71.1–78.6 V. Both share identical VWM (64 V), VC (114 V / 103 V respectively), and packaging. The tighter VBR tolerance of the SMCJ64AH allows more predictable clamping onset in precision-sensitive designs, whereas the SMCJ64CH offers broader process margin and cost efficiency for general-purpose automotive surge protection where exact trigger timing is less critical.
Can the SMCJ64CH be used in bidirectional signal line protection?
No - the SMCJ64CH is strictly unidirectional and unsuitable for bidirectional data lines like RS-485 or USB. For such applications, a bidirectional variant (e.g., SMCJ64C) must be selected, which features symmetrical clamping in both polarities and no inherent polarity marking. Using the SMCJ64CH on AC-coupled or differential signal paths risks forward conduction during normal signal swings, leading to distortion or latch-up. Always verify polarity alignment and signal swing range before deploying the SMCJ64CH.
SMCJ64CH 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:
- 1
- Voltage - Reverse Standoff (Typ):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 114V
- Current - Peak Pulse (10/1000µs):
- 13.8A
- 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)
SMCJ64CH FAQ
1.How can I place an order for SMCJ64CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ64CH 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 SMCJ64CH reliable?
The price and inventory of SMCJ64CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ64CH is usually 5 days.
3.What payment methods are accepted for SMCJ64CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ64CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ64CH?
SMCJ64CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ64CH 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 SMCJ64CH?
For technical support, including SMCJ64CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ64CH requirements.
6.How does Aetrix verify that SMCJ64CH is sourced from the original manufacturer or authorized distributors?
All SMCJ64CH 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 SMCJ64CH meets industry standards.
7.What is the process for return or replacement of SMCJ64CH?
All SMCJ64CH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ64CH, 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 SMCJ64CH part is unused and in its original packaging.
Return procedure for SMCJ64CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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