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Vishay General Semiconductor - Diodes Division SMBJ54CA-E3/52
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- Part No.:
- SMBJ54CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ54CA-E3/52.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:1,305
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Product details
Overview
SMBJ54CA-E3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 54 V standoff voltage (VWM), 600 W peak pulse power (10/1000 µs), and clamps to ≤87.1 V at 6.9 A peak pulse current - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ54CA-E3/52 datasheet, SMBJ54CA-E3/52 pinout, SMBJ54CA-E3/52 application, or SMBJ54CA-E3/52 equivalent, key selection criteria include bidirectional clamping capability, 54 V working voltage compatibility with 48 V systems, low leakage (<1 µA at VWM), and AEC-Q101 qualification readiness via HE3 suffix variants.
Technical Context
This device operates as a voltage-clamped surge protector using an avalanche breakdown junction. Its bidirectional symmetry enables suppression of both positive and negative transients without polarity sensitivity, with breakdown voltage VBR specified between 60.0 V and 66.3 V at 1 mA test current.
Thermal performance is defined by RθJA = 100 °C/W (junction-to-ambient) and RθJL = 20 °C/W (junction-to-lead), supporting operation up to +150 °C junction temperature. The 10/1000 µs waveform rating reflects standardized lightning-surge immunity testing per ANSI/IEEE C62.35.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before clamping initiates; matches 48 V nominal bus systems with 12.5% margin. |
| VBR min/max | 60.0 V / 66.3 V at IT = 1 mA - Ensures reliable turn-on above system overvoltage thresholds while avoiding false triggering. |
| VC @ IPPM | ≤87.1 V at 6.9 A - Clamping voltage limits downstream IC stress during 600 W transient events. |
| IPPM | 6.9 A - Peak surge current handling capacity under standardized 10/1000 µs waveform. |
| PPPM | 600 W - Sustains high-energy transients common in inductive switching and ESD coupling paths. |
| ID @ VWM | ≤1.0 µA - Ultra-low leakage preserves signal integrity and battery life in always-on circuits. |
| TJ max | +150 °C - Enables use in under-hood automotive or high-temperature industrial enclosures. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical cathode/anode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Accepts reverse surge current during negative-going transients; identical electrical behavior to cathode due to bidirectionality. |
| Cathode | Transient current entry (positive half-cycle) | Accepts forward surge current during positive-going transients; functionally interchangeable with anode in this bidirectional device. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Withstands high-energy surges from relay coil collapse or lightning-induced coupling without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes voltage overshoot across protected ICs, reducing risk of latch-up or gate oxide damage. |
| MSL Level 1 (260 °C reflow) | Compatible with standard lead-free PCB assembly processes without moisture sensitivity concerns. |
| Glass passivated junction | Ensures long-term reliability and stable breakdown characteristics under thermal cycling and humidity stress. |
| RoHS-compliant, matte tin-plated leads | Meets J-STD-002 solderability and JESD22-B102 whisker resistance requirements for industrial production. |
Applications
| Industrial Sensor Interface | Telecom Line Protection |
|---|---|
|
Use Scenario: Protecting RS-485 transceivers and analog sensor outputs (e.g., 4–20 mA loops) from ESD and inductive kickback in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential signal pair or supply rail to limit transient excursions. Use Value: Prevents permanent damage to precision op-amps and communication ICs by limiting voltage to ≤87.1 V during 600 W surges. |
Use Scenario: Shielding Ethernet PHY interfaces and DSL line drivers from lightning-induced surges on outdoor-facing copper lines. IC Role / Device Role / Timing Role: Primary front-end TVS element in multi-stage protection circuit, absorbing bulk surge energy before secondary MOV/GDT stages. Use Value: Maintains signal integrity during fast-rising transients (response time <1 ps) while surviving repeated 10/1000 µs events per IEC 61000-4-5. |
| Automotive Body Control Module | Consumer Power Adapter Input |
|
Use Scenario: Safeguarding LIN bus nodes and LED driver inputs against load dump and jump-start transients in vehicle body electronics. IC Role / Device Role / Timing Role: Secondary-level TVS on 12 V supply rails and low-speed data lines where AEC-Q101 qualified variants (e.g., SMBJ54CAHE3) are used. Use Value: Provides robust 54 V standoff with 600 W surge handling - compatible with ISO 7637-2 Pulse 1/2/5a profiles when combined with appropriate series impedance. |
Use Scenario: Input-stage surge suppression in AC-DC adapters for smart home devices exposed to mains-borne transients. IC Role / Device Role / Timing Role: First-line defense on primary-side DC bus (e.g., post-bridge rectifier) to prevent capacitor overvoltage and controller latch-up. Use Value: Limits clamping voltage to 87.1 V at 6.9 A, enabling smaller input capacitors and higher reliability than Zener-based alternatives. |
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-E3/52 | Unidirectional version; same VWM, VBR, PPPM, but only suppresses positive transients. | Requires correct polarity placement; unsuitable for AC-coupled or floating signal lines. | Select SMBJ54A-E3/52 only when protecting unidirectional DC rails with known polarity and no negative transients expected. |
| SMAJ54CA-E3/52 | Same bidirectional function but in smaller SMA (DO-214AC) package; lower PPPM = 400 W. | Lower surge energy handling; suitable for space-constrained designs with reduced threat levels. | Choose SMAJ54CA-E3/52 where board area is critical and surge exposure is limited to IEC 61000-4-2 ESD or low-duty-cycle transients. |
Compared with SMBJ54A-E3/52 and SMAJ54CA-E3/52, the SMBJ54CA-E3/52 uniquely delivers bidirectional 600 W surge protection in the SMB footprint - balancing robustness, polarity insensitivity, and manufacturability for mid-to-high threat environments.
Availability
SMBJ54CA-E3/52 is available at Aetrix Electronics and suitable for industrial sensor interface, telecom line protection, automotive body control module, and consumer power adapter input applications requiring stable component supply and RoHS-compliant sourcing.
Supply support for SMBJ54CA-E3/52 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMBJ series targets high-reliability transient suppression in harsh environments, engineered for industrial, automotive, and telecom infrastructure where consistent clamping and surge endurance are critical.
FAQ
What is the standoff voltage rating of SMBJ54CA-E3/52?
The SMBJ54CA-E3/52 has a maximum reverse standoff voltage (VWM) of 54 V, meaning it remains non-conductive below this DC or RMS voltage level. This value is selected to align with 48 V nominal systems while providing sufficient margin above normal operating voltage to avoid leakage-related power loss or false triggering during benign overvoltage conditions. The SMBJ54CA-E3/52 maintains ≤1.0 µA leakage at this voltage.
Is SMBJ54CA-E3/52 suitable for automotive applications?
The SMBJ54CA-E3/52 itself is commercial-grade (E3 suffix), but Vishay offers AEC-Q101 qualified versions under HE3 suffix (e.g., SMBJ54CAHE3). For automotive use, designers must specify the HE3 variant to ensure qualification for temperature cycling, humidity, and mechanical shock per AEC-Q101. The SMBJ54CA-E3/52 shares identical electrical specs and SMB package, but lacks formal automotive qualification documentation.
How does SMBJ54CA-E3/52 differ from unidirectional SMBJ54A-E3/52?
The SMBJ54CA-E3/52 is bidirectional and suppresses transients of either polarity, while the SMBJ54A-E3/52 is unidirectional and only clamps positive surges relative to its cathode. The CA version has no polarity marking and can be placed without orientation concern; the A version requires correct cathode alignment. Both share identical VWM, VBR, and PPPM, but the SMBJ54CA-E3/52 is preferred for AC signals, floating buses, or unknown-polarity protection points.
What is the clamping voltage of SMBJ54CA-E3/52 at rated surge current?
At its rated peak pulse current of 6.9 A (IPPM), the SMBJ54CA-E3/52 clamps to a maximum of 87.1 V, measured under the standardized 10/1000 µs double-exponential surge waveform. This clamping voltage defines the upper voltage limit imposed on downstream circuitry during surge events and is critical for ensuring protected ICs remain within their absolute maximum ratings. The SMBJ54CA-E3/52 achieves this with a clamping ratio (VC/VBR) of approximately 1.39.
Does SMBJ54CA-E3/52 require heatsinking for standard operation?
No external heatsink is required for SMBJ54CA-E3/52 under typical single-event surge conditions, as its 600 W rating applies to non-repetitive pulses. However, thermal design must account for RθJA = 100 °C/W - meaning ambient temperature rise around the device affects junction temperature. For repetitive surges or high ambient (>85 °C), PCB copper pad area (minimum 0.2" × 0.2" per terminal) and airflow should be verified. The SMBJ54CA-E3/52 relies on PCB conduction, not heatsinks, for thermal management.
SMBJ54CA-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- 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:
- 87.1V
- Current - Peak Pulse (10/1000µs):
- 6.9A
- 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 (SMBJ)
SMBJ54CA-E3/52 FAQ
1.How can I place an order for SMBJ54CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ54CA-E3/52 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 SMBJ54CA-E3/52 reliable?
The price and inventory of SMBJ54CA-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ54CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ54CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ54CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ54CA-E3/52?
SMBJ54CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ54CA-E3/52 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 SMBJ54CA-E3/52?
For technical support, including SMBJ54CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ54CA-E3/52 requirements.
6.How does Aetrix verify that SMBJ54CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ54CA-E3/52 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 SMBJ54CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ54CA-E3/52?
All SMBJ54CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ54CA-E3/52, 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 SMBJ54CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ54CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ54CA-E3/52 Tags
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