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Taiwan Semiconductor Corporation SMCJ64H
- Part No.:
- SMCJ64H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ64H.pdf
- Description:
- 1500W, 79V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:3,911
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Product details
Overview
SMCJ64H 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. It provides robust ESD and surge protection for automotive power rails and industrial DC inputs.
For engineers reviewing the SMCJ64H datasheet, SMCJ64H pinout, SMCJ64H application, or SMCJ64H equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, AEC-Q101 qualification, glass-passivated junction reliability, and thermal resistance (RθJA = 55°C/W) for high-temperature board environments.
Technical Context
The SMCJ64H is a single-die, unidirectional TVS diode optimized for fast transient suppression in automotive and industrial systems. Its glass-passivated junction ensures stable VBR and low leakage (<1µA @ 64V), while its 1.0ps response time enables sub-nanosecond clamping onset during ESD events.
Designed to meet ISO 7637-2 immunity requirements, it handles 1500W peak pulse power (10/1000µs waveform) with a maximum clamping voltage of 114V at 13.8A - critical for protecting downstream 72V-rated CAN transceivers and microcontrollers in 48V vehicle architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous reverse operating voltage before conduction begins; defines safe standoff for 48V/60V DC bus monitoring |
| VBR min/max | 71.1–86.9 V @ 1 mA - Verified breakdown range ensures predictable turn-on margin above VWM for reliable overvoltage detection |
| VC @ IPPM | 114 V @ 13.8 A - Clamping voltage limits stress on protected ICs during 10/1000µs surges per IEC 61000-4-5 |
| PPK | 1500 W - Peak pulse power rating supports repeated surge events without degradation in automotive load-dump scenarios |
| RθJA | 55 °C/W - Junction-to-ambient thermal resistance enables operation up to +150°C ambient when mounted on 1-in² 2-oz copper |
| IR @ VWM | <1 µA - Ultra-low reverse leakage preserves battery life in always-on vehicle modules |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, cathode-banded unidirectional configuration. Matte tin-plated leads, moisture sensitivity level 1 (J-STD-020), UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-impedance return path; forms clamping loop with cathode |
| Cathode | Protected line input | Connected to supply rail (e.g., 48V battery feed); conducts surge current to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood applications including temperature cycling, mechanical shock, and humidity testing |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) immunity requirements |
| Glass-passivated junction | Ensures stable VBR over lifetime and prevents parameter drift under thermal stress or humidity exposure |
| Fast response time | <1.0 ps rise time from 0 V to VBR min - clamps ESD events before sensitive logic thresholds are exceeded |
Applications
| Automotive Body Control Module (BCM) | Industrial 48V DC Power Supply Input |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver power pins against load-dump transients during alternator regulation faults. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed directly at connector entry point to shunt surge energy to chassis ground. Use Value: Limits clamped voltage to 114V, ensuring protected transceivers (e.g., TJA1042) remain within absolute maximum ratings during 12V/48V system faults. | Use Scenario: Safeguarding programmable logic controller (PLC) power input against switching surges from relay coils and motor drives. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 48V DC input rail upstream of DC-DC converters and supervisors. Use Value: Absorbs 1500W pulses without failure, maintaining system uptime in factory automation where surge repetition is frequent. |
| Telecom Remote Radio Unit (RRU) Power Interface | EV Onboard Charger (OBC) Auxiliary Supply |
Use Scenario: Shielding baseband processor power rails from induced lightning surges on outdoor fiber-fed RRU cabinets. IC Role / Device Role / Timing Role: Secondary-level TVS after gas discharge tube (GDT) front-end, providing low-clamp refinement for sensitive analog circuitry. Use Value: 114V clamping ensures ADC references and clock buffers survive combined GDT+TVS staged protection with <5% overshoot. | Use Scenario: Protecting 12V auxiliary supply derived from high-voltage battery in electric vehicle onboard chargers. IC Role / Device Role / Timing Role: Standoff-rated TVS on isolated 12V output of auxiliary power module (APM), guarding MCU and gate drivers. Use Value: 64V VWM aligns precisely with 12V system derating (×5.3), enabling optimal margin between normal operation and clamping onset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A | 600W rating, SMB package (smaller footprint), lower IPPM (6.9A), higher VC (103V) | Suitable for space-constrained consumer electronics but insufficient for automotive load-dump immunity | Select only for non-AEC-Q101, low-energy surge environments where PCB area is critical |
| 1.5KE68A | Through-hole DO-201 package, same 1500W rating, but slower response (>1ns), no AEC-Q101 or ISO 7637-2 validation | Acceptable for industrial AC/DC supplies but not automotive-grade designs requiring validated pulse immunity | Prefer only for legacy through-hole production or cost-sensitive non-automotive applications |
Compared with SMBJ64A and 1.5KE68A, the SMCJ64H delivers superior automotive readiness via AEC-Q101 qualification, ISO 7637-2 compliance, and surface-mount scalability - making it the only choice for new 48V/60V vehicle ECUs requiring zero-layout rework for surge hardening.
Availability
SMCJ64H is available at Aetrix Electronics and suitable for automotive body control modules, industrial 48V power supplies, telecom remote radio units, and EV onboard charger auxiliary circuits requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SMCJ64H 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 AEC-Q101-compliant transient suppression in 12V–48V automotive and industrial power systems, emphasizing robustness, repeatable clamping, and surface-mount manufacturability.
FAQ
What is the clamping voltage of the SMCJ64H under standard 10/1000µs surge conditions?
The SMCJ64H has a maximum clamping voltage (VC) of 114 V at 13.8 A peak pulse current (IPPM), measured using the standardized 10/1000µs double-exponential waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range (−55°C to +150°C) and ensures downstream ICs remain within safe voltage limits during real-world transients.
Is the SMCJ64H suitable for bidirectional surge protection?
No - the SMCJ64H is a unidirectional TVS diode intended for DC line protection with defined polarity. For bidirectional applications such as AC signal lines or differential buses, the SMCJ64AH variant (with CH or CAH suffix) must be used, as it features symmetrical breakdown characteristics in both directions.
Does the SMCJ64H meet automotive qualification standards?
Yes - the SMCJ64H is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b immunity requirements. Its glass-passivated junction, JESD201 Class 2 whisker resistance, and moisture sensitivity level 1 rating further validate its suitability for under-hood automotive deployment.
What is the thermal resistance of the SMCJ64H, and how does it impact layout design?
The SMCJ64H has a junction-to-ambient thermal resistance (RθJA) of 55°C/W under standard JEDEC test conditions. To maintain TJ ≤ 150°C at full 1500W surge, designers must provide ≥1 in² of 2-oz copper pour connected to both terminals - verified in Taiwan Semiconductor's thermal characterization reports for DO-214AB packages.
How does the SMCJ64H differ from the SMCJ64AH variant?
The SMCJ64H has a minimum breakdown voltage of 71.1 V and maximum of 86.9 V, while the SMCJ64AH tightens the upper limit to 78.6 V (min 71.1 V). This narrower VBR window improves consistency in clamping onset across production lots, reducing design margin uncertainty - especially valuable in safety-critical automotive subsystems where predictable turn-on timing is essential.
SMCJ64H 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):
- 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)
SMCJ64H FAQ
1.How can I place an order for SMCJ64H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ64H 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 SMCJ64H reliable?
The price and inventory of SMCJ64H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ64H is usually 5 days.
3.What payment methods are accepted for SMCJ64H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ64H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ64H?
SMCJ64H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ64H 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 SMCJ64H?
For technical support, including SMCJ64H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ64H requirements.
6.How does Aetrix verify that SMCJ64H is sourced from the original manufacturer or authorized distributors?
All SMCJ64H 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 SMCJ64H meets industry standards.
7.What is the process for return or replacement of SMCJ64H?
All SMCJ64H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ64H, 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 SMCJ64H part is unused and in its original packaging.
Return procedure for SMCJ64H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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