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Taiwan Semiconductor Corporation SMBJ54C
- Part No.:
- SMBJ54C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ54C.pdf
- Description:
- 600W, 66.7V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:9,981
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Product details
Overview
SMBJ54C from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with 54V working stand-off voltage (VWM), 60.0–73.3V breakdown voltage (VBR), and 96.3V maximum clamping voltage (VC) at 6.5A peak impulse current - designed for automotive load-dump and inductive-switching surge protection in power supply rails and interface lines.
For engineers reviewing the SMBJ54C datasheet, SMBJ54C pinout, SMBJ54C application, or SMBJ54C equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, unidirectional polarity marking, JEDEC-compliant SMB footprint compatibility, and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance for automotive electronics.
Technical Context
The SMBJ54C operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 60.0–73.3V breakdown range at 1mA test current. It clamps transients to ≤96.3V within <1.0ps response time while dissipating up to 600W peak pulse power (10/1000µs waveform) and sustaining 3W steady-state power at 25°C ambient.
Its glass-passivated junction ensures stable leakage (<1µA at 54V), and its DO-214AA package provides 10°C/W junction-to-case thermal resistance. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1, supporting lead-free reflow assembly without preconditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC/AC rail margin. |
| VBR min/max | 60.0 / 73.3 V @ 1 mA - Breakdown threshold range; determines minimum overvoltage triggering point. |
| VC @ IPP | 96.3 V @ 6.5 A - Clamped voltage during 10/1000µs surge; sets upper limit of protected circuit stress. |
| PPK | 600 W - Peak pulse power handling (10/1000µs); enables robust protection against ISO 7637-2 load dump. |
| ID @ VWM | <1 µA - Reverse leakage at rated stand-off; ensures minimal quiescent power loss in high-impedance circuits. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments. |
| RθJA | 55 °C/W - Junction-to-ambient thermal resistance; informs PCB copper area requirements for thermal management. |
Pinout & Package
DO-214AA (SMB) surface-mount package: 2-terminal, single-die unidirectional TVS diode with cathode band marking on one end. Dimensions conform to JEDEC DO-214AA standard; recommended pad layout per Taiwan Semiconductor spec sheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection | Connected to ground or low-impedance return path; completes clamping loop during transient events. |
| Cathode | High-side connection | Connected to protected line (e.g., 54V rail); conducts avalanche current when VAK > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Clamping performance | 96.3 V max at 6.5 A (10/1000µs) - limits voltage overshoot below 100 V for 54 V systems. |
| Response speed | <1.0 ps - enables suppression of fast EFT bursts before sensitive logic or analog circuitry responds. |
| Leakage control | <1 µA at 54 V - avoids signal integrity degradation or battery drain in always-on automotive modules. |
| Automated placement | DO-214AA (SMB) footprint - compatible with standard SMT pick-and-place equipment and reflow profiles. |
| Environmental compliance | RoHS-compliant, halogen-free (IEC 61249-2-21), UL 94V-0 molding - meets automotive Tier-1 material declarations. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 54 V battery-fed ECUs (e.g., body control modules) from ISO 7637-2 Pulse 5a load-dump surges up to 110 V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp transients before LDO or DC-DC regulator. Use Value: Limits peak voltage to 96.3 V, preserving downstream 100 V-rated input capacitors and avoiding regulator shutdown or latch-up. | Use Scenario: Shielding 4–20 mA current-loop sensor inputs from ESD and inductive switching noise in factory automation PLCs. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt fast transients before signal conditioning op-amps or ADC front-ends. Use Value: Sub-1 ps response prevents transient coupling into high-gain analog stages, maintaining measurement accuracy and reducing digital error flags. |
| LED Driver Output Protection | Telecom DC Power Input Protection |
Use Scenario: Safeguarding constant-current LED driver outputs against back-EMF from disconnected loads or cable shorts in streetlight systems. IC Role / Device Role / Timing Role: Unidirectional TVS connected across output terminals to absorb inductive kickback energy. Use Value: 600 W peak power rating handles repetitive 10/1000 µs surges without degradation, extending driver MOSFET lifetime. | Use Scenario: Securing -48 V telecom rectifier outputs against lightning-induced surges entering via long distribution cables. IC Role / Device Role / Timing Role: TVS installed at power entry point upstream of DC-DC converters and hot-swap controllers. Use Value: 96.3 V clamping ensures protected circuitry remains below -53 V absolute maximum rating of common telecom PMICs. |
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 | Lower VBR range (60.0–66.3 V vs. 60.0–73.3 V); tighter tolerance; same VC = 87.1 V @ 7.2 A. | Better suited for precision-clamp designs where lower VBR minimizes margin risk near system overvoltage thresholds. | Select SMBJ54A when tighter breakdown consistency is required and peak current capability ≥7.2 A is available in layout. |
| SMCJ54C | Same VWM/VBR/VC specs but in larger DO-214AB (SMC) package; higher PPK = 1500 W; RθJA = 35 °C/W. | Used where higher surge endurance or improved thermal dissipation is needed, e.g., in high-temperature under-hood locations. | Choose SMCJ54C only if board space allows DO-214AB footprint and thermal design requires >600 W pulse handling. |
Compared with SMBJ54C, SMBJ54A offers tighter VBR control at slightly reduced surge current capacity, while SMCJ54C delivers triple the peak power in a larger package - making SMBJ54C the optimal balance of compactness, clamping performance, and cost for mid-tier automotive and industrial 54 V rail protection.
Availability
SMBJ54C is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, LED driver outputs, and telecom DC power inputs requiring stable component supply with full traceability and lifecycle support.
Supply support for SMBJ54C 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, serving global automotive, industrial, and consumer markets since 1979.
The SMBJ series was developed specifically for high-reliability transient suppression in automotive power systems and industrial equipment, emphasizing ISO 7637-2 compliance, tight parametric control, and robust SMT manufacturability.
FAQ
What is the polarity configuration of SMBJ54C?
SMBJ54C is a unidirectional TVS diode, configured with anode and cathode terminals marked by a cathode band on the DO-214AA package body. It conducts only during reverse-biased overvoltage events - forward voltage drop is 3.5 V at 50 A, consistent with other SMBJ5.0–SMBJ90 devices. This polarity must be observed during PCB layout to ensure proper clamping behavior in SMBJ54C applications.
Does SMBJ54C meet automotive surge immunity standards?
Yes, SMBJ54C meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements for electrical disturbances in road vehicles. Its 600 W peak pulse power rating, sub-1 ps response time, and specified clamping voltage ensure reliable suppression of both slow and fast transients encountered in 12 V and 24 V automotive systems - a key validation point confirmed in Taiwan Semiconductor's SMBJ series qualification report R2104 for SMBJ54C.
What is the maximum clamping voltage of SMBJ54C and at what current is it specified?
The maximum clamping voltage of SMBJ54C is 96.3 V, measured at a peak impulse current (IPP) of 6.5 A using the standardized 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range and represents the highest voltage seen across SMBJ54C during worst-case surge events - critical for verifying margin against downstream component absolute maximum ratings.
How does SMBJ54C differ from SMBJ54A in practical design use?
SMBJ54C has a wider VBR range (60.0–73.3 V) versus SMBJ54A (60.0–66.3 V), resulting in higher worst-case clamping voltage under marginal conditions. SMBJ54A also exhibits lower VC (87.1 V) at higher IPP (7.2 A), offering tighter voltage control for designs sensitive to clamping margin. Both share identical VWM (54 V), package (DO-214AA), and application scope - but SMBJ54C is preferred where broader VBR tolerance accommodates manufacturing variance in high-volume automotive builds.
Is SMBJ54C RoHS and halogen-free compliant?
Yes, SMBJ54C is fully RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound meets UL 94V-0 flammability rating, and its matte tin-plated leads are solderable per J-STD-002. These certifications are documented in Taiwan Semiconductor's SMBJ series specification R2104 and verified through third-party material testing reports applicable to SMBJ54C production lots.
SMBJ54C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 96.3V
- Current - Peak Pulse (10/1000µs):
- 6.5A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ54C FAQ
1.How can I place an order for SMBJ54C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ54C 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 SMBJ54C reliable?
The price and inventory of SMBJ54C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ54C is usually 5 days.
3.What payment methods are accepted for SMBJ54C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ54C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ54C?
SMBJ54C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ54C 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 SMBJ54C?
For technical support, including SMBJ54C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ54C requirements.
6.How does Aetrix verify that SMBJ54C is sourced from the original manufacturer or authorized distributors?
All SMBJ54C 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 SMBJ54C meets industry standards.
7.What is the process for return or replacement of SMBJ54C?
All SMBJ54C units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ54C, 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 SMBJ54C part is unused and in its original packaging.
Return procedure for SMBJ54C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ54C Tags
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