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SMBJ36CA
HY Electronic (Cayman) Limited
Surface Mount Uni/Bi-Directional
16981 Pcs New Original In Stock
58.1V Clamp 10.4A Ipp Tvs Diode Surface Mount SMB (DO-214AA)
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5.0 / 5.0
- (238 Ratings)
SMBJ36CA
Product Overview
2221649
DiGi Electronics Part Number
SMBJ36CA-DGManufacturer
HY Electronic (Cayman) Limited
SMBJ36CA
Description
Surface Mount Uni/Bi-DirectionalInventory
16981 Pcs New Original In Stock
58.1V Clamp 10.4A Ipp Tvs Diode Surface Mount SMB (DO-214AA)
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
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SMBJ36CA Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
-
Series
SMBJ-AT
Product Status
Active
Type
Zener
Bidirectional Channels
1
Voltage - Reverse Standoff (Typ)
36V
Voltage - Breakdown (Min)
40V
Voltage - Clamping (Max) @ Ipp
58.1V
Current - Peak Pulse (10/1000µs)
10.4A
Power - Peak Pulse
600W
Power Line Protection
No
Applications
Telecom
Capacitance @ Frequency
-
Operating Temperature
-55°C ~ 150°C (TJ)
Grade
Automotive
Qualification
AEC-Q101
Mounting Type
Surface Mount
Package / Case
DO-214AA, SMB
Supplier Device Package
SMB (DO-214AA)
Datasheet & Documents
HTML Datasheet
SMBJ36CA-DG
Environmental & Export Classification
RoHS Status
RoHS Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Affected
ECCN
EAR99
HTSUS
8541.10.0080
Additional Information
Other Names
4024-SMBJ36CATR
Standard Package
5
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
디지의 서비스는 기대를 저버리지 않으며, 언제나 만족스럽습니다.
de desembre 02, 2025
Je suis très satisfait de leur capacité à expédier rapidement et leur suivi après-vente ultra réactif.
de desembre 02, 2025
Reliable tracking and attentive support make working with them a pleasure.
de desembre 02, 2025
I admire their dedication to rapid fulfillment and customer care.
de desembre 02, 2025
The service staff was approachable and patient, making me feel comfortable throughout.
de desembre 02, 2025
I highly recommend DiGi Electronics for budget-friendly and eco-aware products.
de desembre 02, 2025
Their commitment to after-sales support reassures me that I made the right choice.
de desembre 02, 2025
Affordable, eco-friendly, and quality service—DiGi Electronics ticks all the boxes.
de desembre 02, 2025
The shipping was so fast that I received my item before I even expected, exceeding my expectations.
de desembre 02, 2025
Their logistics tracking provides real-time updates, which I greatly appreciate.
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Frequently Asked Questions (FAQ)
When replacing a failed SMAJ36CA TVS diode in an automotive-grade telecom circuit, is the SMBJ36CA a drop-in replacement and what design-in risks should I watch for?
The SMBJ36CA can serve as a functional upgrade from the SMAJ36CA in most cases, but key design-in risks must be addressed. While both are AEC-Q101 qualified bidirectional TVS diodes with a 36V reverse standoff, the SMBJ36CA uses a larger SMB (DO-214AA) package vs. SMA, offering better thermal dissipation and handling a higher peak pulse current (10.4A vs. 9.4A). However, PCB layout must be modified to accommodate the footprint. Ensure your design doesn't exceed the clamping voltage of 58.1V under worst-case surge conditions, especially in PoE or line-card interfaces where overshoot could affect downstream ICs. Verify transient event frequency, as repeated clamping near limits may degrade long-term reliability despite the AEC-Q101 grade.
Can the SMBJ36CA reliably protect sensitive 36V CAN FD buses in harsh environments, and how does its clamping performance compare to the SP3049-03UTG in practice?
The SMBJ36CA is well-suited for protecting 36V-rated CAN FD buses in automotive and industrial telecom systems when surge threats like ESD (IEC 61000-4-2) or EFT (IEC 61000-4-4) are present. Its 58.1V max clamping voltage at 10.4A provides headroom over the 36V nominal line, but in edge cases where transients rise faster than the diode responds, downstream ICs with lower absolute maximum ratings may still be at risk. Compared to the SP3049-03UTG, which integrates a lower dynamic resistance and better sub-30V clamping, the SMBJ36CA offers higher single-pulse power handling (600W vs. 330W) but less precision in low-voltage clamping. Use the SMBJ36CA for high-energy transients; consider the SP3049-03UTG if tighter clamping is critical.
What are the key thermal design considerations for the SMBJ36CA when subjected to frequent transient events in a densely populated surface-mount telecom board?
Even though the SMBJ36CA is rated for 600W peak pulse (10/1000μs) and an operating junction temperature up to 150°C, repeated transient events can accumulate thermal stress, especially on compact PCBs with limited copper pour. To mitigate risk, ensure at least 2 cm² of 2 oz copper layout for the cathode/anode pads to act as a heatsink. Avoid placing the SMBJ36CA near other heat-generating components like power regulators. In applications where multiple surges occur in short succession (e.g., industrial field equipment), consider derating the allowed pulse count or adding a series current-limiting resistor to reduce energy transfer. Monitoring junction temperature via worst-case ambient + self-heating models is recommended for long-term reliability.
How does the bidirectional operation of the SMBJ36CA impact its effectiveness in protecting AC-coupled signal lines versus unidirectional alternatives?
The bidirectional nature of the SMBJ36CA makes it ideal for protecting AC-coupled or differential signal lines in telecom infrastructure (e.g., modem interfaces or transceivers), where transient polarity is unpredictable. Unlike unidirectional TVS diodes that only clamp positive surges, the SMBJ36CA clamps both polarities symmetrically from a common 36V standoff, preventing reverse breakdown damage. However, for strictly DC-biased lines (e.g., power rails), a unidirectional device may offer slightly better clamping efficiency in the forward surge direction. Always verify signal integrity impact — while SMBJ36CA doesn't specify capacitance, typical DO-214AA bidirectional TVS diodes exhibit 50–100pF, which may distort high-speed signals above 10 MHz.
What are the reliability risks of using the AEC-Q101 qualified SMBJ36CA in non-automotive industrial designs, and does its RoHS compliance affect long-term field performance?
Using the AEC-Q101 qualified SMBJ36CA in industrial telecom applications enhances reliability due to its rigorous stress testing (temperature cycling, HAST, etc.), making it robust even outside automotive contexts. However, in environments with continuous humidity exposure (e.g., outdoor enclosures), confirm conformal coating is applied, as the MSL-1 rating guarantees moisture resistance only up to 30°C/85% RH before soldering. Post-assembly, the device is not hermetically sealed. RoHS compliance of the SMBJ36CA ensures lead-free assembly, but this necessitates proper reflow profiles to avoid solder joint voids or thermal shock during manufacturing. When repaired or hand-soldered, exceed peak temperature limits at your peril — the 150°C Tj max does not include soldering excursions, risking latent defects.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
SMBJ36CA CAD Models
HY Electronic (Cayman) Limited SMBJ36CA PCB symbols & footprints
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