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SMF150CA
Meritek
TVS DIODE 150VWM 243VC
44190 Pcs New Original In Stock
243V Clamp 820mA Ipp Tvs Diode Surface Mount
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Minimum 1
5.0 / 5.0
- (472 Ratings)
SMF150CA
Product Overview
9813923
DiGi Electronics Part Number
SMF150CA-DGManufacturer
Meritek
SMF150CA
Description
TVS DIODE 150VWM 243VCInventory
44190 Pcs New Original In Stock
243V Clamp 820mA Ipp Tvs Diode Surface Mount
Quantity
Minimum 1
Minimum 1
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SMF150CA Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
Tape & Reel (TR)
Series
SMF
Product Status
Active
Type
Zener
Bidirectional Channels
1
Voltage - Reverse Standoff (Typ)
150V
Voltage - Breakdown (Min)
167V
Voltage - Clamping (Max) @ Ipp
243V
Current - Peak Pulse (10/1000µs)
820mA
Power - Peak Pulse
200W
Power Line Protection
-
Applications
General Purpose
Capacitance @ Frequency
-
Operating Temperature
-55°C ~ 150°C
Mounting Type
Surface Mount
Package / Case
SOD-123FL
Supplier Device Package
-
Datasheet & Documents
HTML Datasheet
SMF150CA-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
2997-SMF150CATR
Standard Package
20
Reviews
5.0/5.0-(Show up to 5 Ratings)
грудня 02, 2025
お得な価格と高品質に、友人にもおすすめしています。
грудня 02, 2025
The packaging design is both functional and attractive, showing their focus on delivering a premium experience.
грудня 02, 2025
I am impressed with their ability to deliver solutions as quickly as possible.
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Frequently Asked Questions (FAQ)
When replacing a legacy TVS diode like the P6KE150CA in a 150V industrial power rail application, can the SMF150CA from Meritek be used as a drop-in alternative considering footprint, clamping behavior, and pulse power handling?
The SMF150CA is not a direct drop-in replacement for the P6KE150CA due to significant differences in package size and peak pulse power capability. While both are 150V bidirectional TVS diodes, the P6KE150CA comes in a larger DO-204AC axial package with a 600W peak pulse rating, whereas the SMF150CA is in a compact SOD-123FL surface-mount package rated at only 200W. This lower power handling means the SMF150CA may fail under high-energy transients common in industrial environments. Additionally, the SMF150CA’s clamping voltage of 243V at 820mA is higher than typical P6KE150CA values, potentially leaving downstream components underprotected. If space constraints force the use of SMF150CA, consider adding upstream current-limiting resistors or fuses and validate system-level surge immunity per IEC 61000-4-5 to mitigate risk of cascading failures.
In a compact IoT sensor node powered by a 140V DC bus with frequent inductive load switching, is the SMF150CA sufficient for transient protection, or does its 200W peak power rating pose a reliability risk during repeated ESD or surge events?
The SMF150CA’s 200W peak pulse power rating is marginal for repeated or high-energy transients in a 140V DC system with inductive loads. While it meets basic ESD protection needs (e.g., IEC 61000-4-2), its limited energy absorption capability makes it vulnerable to degradation or failure during sustained or repetitive surge events such as those from relay coils or motor drives. For mission-critical IoT nodes, consider upgrading to a higher-power TVS like the SMAJ150CA (400W, SMA package) or implementing a multi-stage protection scheme with a series ferrite bead and bulk capacitor upstream of the SMF150CA. This reduces the transient energy seen by the diode and extends operational life in electrically noisy environments.
Can the SMF150CA be safely used in automotive 12V systems where load dump transients exceed 100V, given its 150V reverse standoff voltage and surface-mount SOD-123FL package limitations?
Using the SMF150CA in automotive 12V systems for load dump protection is not recommended despite its 150V standoff voltage. ISO 7637-2 load dump pulses can reach 100–120V with durations up to 400ms and energies far exceeding the SMF150CA’s 200W/820mA capability. The SOD-123FL package lacks the thermal mass and robustness needed for such high-energy events, increasing the risk of thermal runaway or bond wire failure. Instead, use automotive-qualified TVS diodes like the SLD150CA (600W, SMC package) or SM8S150A, which are designed for ISO 7637 compliance. If the SMF150CA must be used due to space constraints, pair it with a resettable fuse and validate under actual load dump test conditions to avoid field failures.
How does the SMF150CA compare to the Littelfuse SMAJ150CA in terms of real-world clamping performance and long-term reliability when protecting a 130V microcontroller power rail in a high-temperature industrial enclosure?
The SMF150CA and SMAJ150CA both have a 150V standoff, but the SMAJ150CA offers superior performance in high-temperature, high-reliability scenarios. With a 400W peak power rating (vs. 200W for SMF150CA) and an SMA package with better thermal dissipation, the SMAJ150CA maintains more stable clamping behavior under repeated pulses and elevated temperatures up to 150°C. The SMF150CA’s smaller SOD-123FL package runs hotter under stress, accelerating degradation and increasing leakage current over time—especially critical near its 150°C limit. For a 130V MCU rail in a hot enclosure, the SMAJ150CA provides a wider safety margin. If board space prohibits SMA packages, ensure the SMF150CA is mounted with maximum copper pour and avoid placing it near other heat sources to mitigate thermal stress.
Is it safe to parallel two SMF150CA diodes to increase current handling when protecting a 145V telecom interface against IEC 61000-4-5 surge requirements, and what are the risks of current imbalance and thermal runaway?
Paralleling two SMF150CA diodes is not recommended due to inherent manufacturing tolerances in breakdown voltage and dynamic resistance, which lead to unequal current sharing during fast transients. Even small variations can cause one diode to absorb significantly more energy, leading to premature failure and potential thermal runaway—especially in the thermally constrained SOD-123FL package. Additionally, the combined effective capacitance and layout inductance may distort transient response, reducing protection effectiveness. Instead of paralleling, select a single higher-power TVS such as the SMCJ150CA (1500W, SMC package) that meets IEC 61000-4-5 Class 2 or higher requirements. If space or cost constraints prevent this, use a current-balancing resistor (e.g., 1–5Ω, 1W) in series with each SMF150CA, but validate the solution under actual surge testing to ensure reliability.
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.
SMF150CA CAD Models
Meritek SMF150CA PCB symbols & footprints
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