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SMBJ30CA
Good-Ark Semiconductor
TVS, BI-DIR, 600W, 30V, DO-214AA
71324 Pcs New Original In Stock
48.4V Clamp 12.4A Ipp Tvs Diode Surface Mount DO-214AA (SMB)
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5.0 / 5.0
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SMBJ30CA
Product Overview
2550254
DiGi Electronics Part Number
SMBJ30CA-DGManufacturer
Good-Ark Semiconductor
SMBJ30CA
Description
TVS, BI-DIR, 600W, 30V, DO-214AAInventory
71324 Pcs New Original In Stock
48.4V Clamp 12.4A Ipp Tvs Diode Surface Mount DO-214AA (SMB)
Quantity
Minimum 1
Minimum 1
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SMBJ30CA Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
Cut Tape (CT) & Digi-Reel®
Series
SMBJx
Product Status
Active
Type
Zener
Bidirectional Channels
1
Voltage - Reverse Standoff (Typ)
30V
Voltage - Breakdown (Min)
33.3V
Voltage - Clamping (Max) @ Ipp
48.4V
Current - Peak Pulse (10/1000µs)
12.4A
Power - Peak Pulse
600W
Power Line Protection
No
Applications
General Purpose
Capacitance @ Frequency
-
Operating Temperature
-55°C ~ 150°C (TJ)
Mounting Type
Surface Mount
Package / Case
DO-214AA, SMB
Supplier Device Package
DO-214AA (SMB)
Datasheet & Documents
HTML Datasheet
SMBJ30CA-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8541.10.0080
Additional Information
Other Names
4786-SMBJ30CACT
4786-SMBJ30CADKR
4786-SMBJ30CATR
Standard Package
3,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
디지 전자에서 첫 구매 후 만족도 최고! 고객 서비스가 친절했고 배송도 빠르게 왔어요.
de desembre 02, 2025
Die Nutzerführung auf der Website war genial, und mein Paket kam viel schneller an, als ich erwartet hatte.
de desembre 02, 2025
Their focus on affordability and customer service makes DiGi Electronics stand out.
de desembre 02, 2025
I appreciate the reliability of DiGi Electronics' products; they've never let me down.
de desembre 02, 2025
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Frequently Asked Questions (FAQ)
Can I use the SMBJ30CA TVS diode to protect a 30V industrial sensor interface from inductive load switching transients, and what layout considerations are critical to avoid clamping failure?
Yes, the SMBJ30CA is suitable for protecting 30V sensor interfaces against inductive kickback due to its 30V reverse standoff voltage and 600W peak pulse power rating. However, to prevent clamping failure, minimize loop area between the TVS, protected IC, and ground by placing the SMBJ30CA as close as possible to the connector or load switch. Use a solid ground plane and avoid vias in the high-current transient path—excessive inductance can cause voltage overshoot beyond the 48.4V clamp level during fast transients.
What are the risks of replacing the SMBJ30CA with a lower-cost unidirectional TVS like the SMAJ30A in a bidirectional surge environment such as RS-485 communication lines?
Replacing the bidirectional SMBJ30CA with a unidirectional SMAJ30A on RS-485 lines introduces significant risk because negative voltage transients (e.g., from ESD or cable discharge) will forward-bias the SMAJ30A’s parasitic diode, potentially exceeding the receiver’s absolute maximum ratings. The SMBJ30CA’s symmetric breakdown ensures protection in both polarities, which is essential for differential signaling. Using a unidirectional part may lead to latent damage or immediate failure during negative surges.
How does the SMBJ30CA compare to the Littelfuse SMDJ30CA in terms of surge robustness and long-term reliability in outdoor telecom power supply inputs exposed to lightning-induced transients?
While both the SMBJ30CA (Good-Ark) and SMDJ30CA (Littelfuse) share similar electrical specs (30V standoff, ~600W), the SMDJ30CA typically undergoes more rigorous qualification for IEC 61000-4-5 surge compliance and has documented long-term field reliability in telecom applications. The SMBJ30CA is cost-effective for general-purpose use but may exhibit higher parametric drift after repeated 10/1000µs pulses. For mission-critical outdoor systems, validate the SMBJ30CA with extended surge cycling tests or consider derating its peak pulse current by 20% for margin.
Is it safe to parallel two SMBJ30CA diodes to increase surge current handling in a high-energy automotive load dump scenario, and what matching criteria should I enforce?
Paralleling SMBJ30CA diodes is not recommended due to inherent manufacturing variations in breakdown voltage (±5% typical), which cause uneven current sharing during fast transients. Even minor mismatches can lead to one diode absorbing most of the 12.4A Ipp, risking thermal runaway. Instead, select a single higher-power device like the SMCJ30CA (1500W) or use a dedicated automotive TVS array. If paralleling is unavoidable, bin devices by breakdown voltage and include small series resistors (0.1–0.5Ω), though this reduces effective clamping performance.
Can the SMBJ30CA be used on a 24V CAN bus system without risking leakage current interference during low-power sleep modes, and how does its capacitance affect signal integrity at 1 Mbps?
The SMBJ30CA’s leakage current (typically <1µA at 30V) is negligible for 24V CAN bus sleep modes and won’t disrupt bus biasing. However, while its capacitance isn’t specified, typical SMBJ-series TVS diodes exhibit ~100–200pF, which can distort high-speed CAN signals at 1 Mbps if placed incorrectly. To preserve signal integrity, mount the SMBJ30CA close to the transceiver pins and avoid stubs; alternatively, consider low-capacitance alternatives like the PESD30CAN from Nexperia (<5pF) if EMI filtering is already present upstream.
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.
SMBJ30CA CAD Models
Good-Ark Semiconductor SMBJ30CA PCB symbols & footprints
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