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Taiwan Semiconductor Corporation SMCJ54H
- Part No.:
- SMCJ54H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ54H.pdf
- Description:
- 1500W, 66.7V, 10%, UNIDIRECTIONA
- Quantity:
- Payment:
- Shipping:
Inventory:6,507
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Product details
Overview
SMCJ54H from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 54V working stand-off voltage (VWM), 60–73.3V breakdown voltage (VBR), and 96.3V maximum clamping voltage (VC) at 16A 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 in power supply rails.
For engineers reviewing the SMCJ54H datasheet, SMCJ54H pinout, SMCJ54H application, or SMCJ54H equivalent, this page provides verified electrical parameters, thermal performance data, polarity marking guidance, clamping behavior under 10/1000μs transients, and direct alternatives for automotive-grade DC bus protection.
Technical Context
The SMCJ54H operates as a unidirectional avalanche diode, activated only during reverse overvoltage events above its VBR threshold. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1μA at 54V), while its 10°C/W junction-to-case thermal resistance supports sustained surge handling in compact PCB layouts.
Designed for single-pulse transient suppression per IEC 61000-4-5 and ISO 7637-2, it exhibits sub-1ps response time and clamps 1500W peak power within a 10/1000μs waveform-enabling robust immunity against load-switching spikes and coupled lightning surges in 12V/24V vehicle subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 60–73.3 V @ 1 mA - Confirmed breakdown range ensuring reliable turn-on margin above VWM |
| VC @ IPPM | 96.3 V @ 16 A - Clamping voltage limiting downstream IC stress during 10/1000μs transients |
| PPK | 1500 W - Peak pulse power rating defining maximum transient energy absorption capability |
| IR @ VWM | <1 μA - Ultra-low reverse leakage preserving system standby current budget |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| RθJC | 10 °C/W - Thermal resistance confirming efficient heat transfer to PCB copper pour or heatsink |
Pinout & Package
DO-214AB (SMC) surface-mount package with cathode band marking on one end; leads are matte tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance. Polarity is unidirectional: anode connects to protected line, cathode to ground or lower potential rail.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (non-banded end) | Protected circuit node input | Connected to power rail or signal line requiring transient immunity |
| Cathode (banded end) | Clamp reference / return path | Must connect directly to low-impedance ground plane to maintain clamping integrity |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| ISO 7637-2 compliance | Guarantees immunity to standardized automotive transients (Pulse 1, 2a, 2b, 3a, 3b) |
| Glass passivated junction | Ensures long-term stability of VBR and low parametric drift across temperature and life cycles |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking or dry-pack requirements |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU directives for environmentally constrained designs |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 24V CAN bus power rails and sensor supply lines in ADAS domain controllers against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between fused battery feed and local LDO input. Use Value: Limits transient voltage to ≤96.3V, preventing damage to 36V-rated regulators and maintaining ASIL-B functional safety integrity. | Use Scenario: Safeguarding analog input channels (4–20mA, 0–10V) in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Front-end transient suppressor mounted at terminal block entry point before signal conditioning circuitry. Use Value: Absorbs up to 1500W of induced energy without degradation, preserving measurement accuracy and avoiding false trip events. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drivers |
Use Scenario: Shielding PoE-powered switch ports and remote radio unit DC inputs from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on 48V DC input stage upstream of DC/DC converters. Use Value: Clamps 10/1000μs surges to 96.3V within <1ps, meeting IEC 61000-4-5 Level 4 immunity requirements. | Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Reverse-biased TVS across motor terminals to quench inductive kickback. Use Value: Handles 200A non-repetitive forward surge (IFSM), eliminating need for external snubbers and reducing BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ54A | 600W rating, SMB package (smaller footprint), higher clamping voltage (111V @ 8.3A) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a (load dump) | Select when board space is constrained and peak surge energy remains below 600W |
| 1.5KE54A | Through-hole DO-201 package, same 1500W rating but slower thermal recovery and no AEC-Q101 qualification | Not recommended for automotive; acceptable for industrial AC/DC front ends with manual assembly | Choose only for legacy through-hole designs where rework to SMD is impractical |
Compared with SMBJ54A and 1.5KE54A, the SMCJ54H offers superior surge capacity in a surface-mount form factor with automotive-grade reliability, making it the preferred choice for new 24V vehicle electronics where PCB real estate and qualification compliance are critical.
Availability
SMCJ54H is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, telecom DC power feeds, and consumer appliance motor drivers requiring stable component supply across production lifecycles.
Supply support for SMCJ54H 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 high-reliability protection devices and power management components.
The SMCJ series was developed specifically for automotive and industrial transient suppression, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust thermal performance in surface-mount packages.
FAQ
What is the clamping voltage of SMCJ54H at its rated peak pulse current?
The SMCJ54H has a maximum clamping voltage (VC) of 96.3 V at 16 A peak impulse current (IPPM), measured under the standardized 10/1000 μs double-exponential transient waveform. This value ensures downstream 36V-rated ICs remain within safe operating limits during automotive load-dump events. The SMCJ54H maintains this clamping performance across its full operating temperature range of –55°C to +150°C.
Is SMCJ54H suitable for bidirectional transient protection?
No, the SMCJ54H is a unidirectional TVS diode intended for DC rail protection with defined polarity (cathode band marking). For bidirectional applications such as AC lines or data bus protection, the SMCJ54CH or SMCJ54CAH variants must be used instead. These include symmetrical breakdown characteristics in both directions and are explicitly designated in the datasheet for bipolar use cases.
Does SMCJ54H require derating at elevated ambient temperatures?
Yes, the SMCJ54H must be derated above TA = 25°C per Figure 2 in the datasheet. Its peak pulse power drops linearly to ~750W at 75°C ambient and to zero at +150°C junction temperature. Designers must calculate effective power dissipation using RθJA = 55°C/W and ensure adequate PCB copper area or thermal vias to maintain TJ ≤ 150°C during repeated surge events.
What is the reverse leakage current specification for SMCJ54H at its working voltage?
The SMCJ54H specifies maximum reverse leakage current (IR) of less than 1 μA at its working stand-off voltage (VWM) of 54 V, tested at 25°C. This ultra-low leakage preserves battery standby current in always-on automotive modules and avoids unintended biasing of sensitive analog front-ends. The value remains stable due to the device's glass-passivated junction construction.
How does SMCJ54H differ from SMCJ54AH in terms of electrical performance?
The SMCJ54AH variant has tighter breakdown voltage tolerance (60–66.3 V vs. 60–73.3 V for SMCJ54H) and lower clamping voltage (87.1 V vs. 96.3 V at 18 A), achieved via enhanced process control. Both share identical package, AEC-Q101 qualification, and ISO 7637-2 compliance. The SMCJ54H offers broader VBR spread for cost-sensitive applications where clamping margin is less critical.
SMCJ54H 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):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 96.3V
- Current - Peak Pulse (10/1000µs):
- 16A
- 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)
SMCJ54H FAQ
1.How can I place an order for SMCJ54H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ54H 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 SMCJ54H reliable?
The price and inventory of SMCJ54H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ54H is usually 5 days.
3.What payment methods are accepted for SMCJ54H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ54H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ54H?
SMCJ54H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ54H 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 SMCJ54H?
For technical support, including SMCJ54H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ54H requirements.
6.How does Aetrix verify that SMCJ54H is sourced from the original manufacturer or authorized distributors?
All SMCJ54H 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 SMCJ54H meets industry standards.
7.What is the process for return or replacement of SMCJ54H?
All SMCJ54H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ54H, 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 SMCJ54H part is unused and in its original packaging.
Return procedure for SMCJ54H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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