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1.5KE12A
Meritek
16.7V Clamp 91A Ipp TVS Diode Th
30435 Pcs New Original In Stock
16.7V Clamp Ipp Tvs Diode Through Hole DO-201
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5.0 / 5.0
- (329 Ratings)
1.5KE12A
Product Overview
5704818
DiGi Electronics Part Number
1.5KE12A-DGManufacturer
Meritek
1.5KE12A
Description
16.7V Clamp 91A Ipp TVS Diode ThInventory
30435 Pcs New Original In Stock
16.7V Clamp Ipp Tvs Diode Through Hole DO-201
Quantity
Minimum 1
Minimum 1
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1.5KE12A Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
Tape & Reel (TR)
Series
1.5KE
Product Status
Active
Unidirectional Channels
1
Voltage - Breakdown (Min)
11.4V
Voltage - Clamping (Max) @ Ipp
16.7V
Power - Peak Pulse
1500W (1.5kW)
Operating Temperature
-55°C ~ 175°C
Mounting Type
Through Hole
Package / Case
Axial
Supplier Device Package
DO-201
Datasheet & Documents
HTML Datasheet
1.5KE12A-DG
Environmental & Export Classification
Moisture Sensitivity Level (MSL)
1 (Unlimited)
ECCN
EAR99
HTSUS
8532.25.0020
Additional Information
Other Names
2997-1.5KE12ATR
Standard Package
500
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
항상 예정된 시간에 도착하고 포장도 꼼꼼하게 처리되어 있어 신뢰가 깊어요.
Dec 02, 2025
Le site de DiGi Electronics est très professionnel, avec une interface moderne. Leur modèle de tarification très compétitif est un véritable atout.
Dec 02, 2025
Die pünktliche Zustellung macht den Bestellprozess bei DiGi Electronics sehr angenehm, die Qualität der Produkte ist stets überzeugend.
Dec 02, 2025
They have proven to be a dependable partner with a genuinely friendly team.
Dec 02, 2025
I appreciate the transparency and communication maintained by DiGi’s support team.
Dec 02, 2025
Their packaging arrives in perfect condition, demonstrating the durability of materials used.
Dec 02, 2025
Their customer support team is very responsive and always ready to help resolve any post-purchase concerns effectively.
Dec 02, 2025
The rapid delivery service from DiGi Electronics is unmatched; I received my order less than a day after purchase.
Dec 02, 2025
Efficient logistics planning has helped me meet tight project deadlines.
Dec 02, 2025
Speedy delivery and prompt responses from customer service made me a repeat customer.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the 1.5KE12A for surge protection in industrial power supplies, and how can they be mitigated?
When designing in the 1.5KE12A for industrial power supplies, a key risk is inadvertent clamping during normal transient events due to its 11.4V minimum breakdown voltage, which may be too close to 12V nominal operating rails under load dump or cold-cranking conditions. To mitigate this, ensure system voltage transients under normal operation stay below 11.4V, or consider a higher-voltage variant like the 1.5KE15A (13.3V min breakdown) to provide margin. Additionally, account for temperature effects on leakage current above 85°C and verify PCB spacing meets creepage requirements for 16.7V clamping in high-humidity environments to prevent arcing.
How does the 1.5KE12A compare to the Littelfuse 1.5KE12CA in bidirectional surge protection applications, and can they be used interchangeably?
The 1.5KE12A is unidirectional, while the Littelfuse 1.5KE12CA is bidirectional; this makes them functionally different and not directly interchangeable without circuit redesign. Using the 1.5KE12A in AC or bipolar transient environments (e.g., RS-485 lines or AC power monitoring) risks device failure due to reverse breakdown in the absence of reverse-blocking protection. For bidirectional needs, either pair the 1.5KE12A with a blocking diode or replace it with a true bidirectional TVS like the 1.5KE12CA. Always verify polarity in the schematic and ensure the 1.5KE12A's cathode aligns with positive transient sources.
What reliability concerns should be evaluated when replacing the 1.5KE12A with a surface-mount equivalent like the SMAJ12A in high-temperature environments?
Replacing the through-hole 1.5KE12A with the surface-mount SMAJ12A introduces thermal and mechanical reliability risks in high-vibration or high-temperature environments. The DO-201 package of the 1.5KE12A offers better heat dissipation under repetitive 1500W surges compared to the SMA package, especially without thermal vias. In systems operating near 125°C ambient, the SMAJ12A may experience earlier thermal runaway due to limited PCB heat spreading. If migrating to SMT, derate peak pulse current by at least 30%, validate thermal performance under worst-case surge duty cycles, and consider enhancing copper area or using dual SMAJ devices in parallel with current-sharing resistors.
How do I ensure the 1.5KE12A provides robust protection in automotive load dump scenarios without nuisance triggering?
To prevent nuisance triggering of the 1.5KE12A during automotive load dump (which can reach 40V but is typically clamped by alternator regulators), confirm that the protected circuit operates well below 11.4V breakdown under all normal conditions, including cold starts and regenerative loads. Use the 1.5KE12A downstream of a primary load dump protector (e.g., in secondary low-voltage rails), not on the main battery line. Additionally, verify the pulse waveform (typically 400ms in duration) does not exceed the 1.5KE12A's energy rating — calculate total energy using Ipp and clamping voltage over time, and consider a higher-holdoff TVS like the 1.5KE24A for primary protection. Always include series impedance (e.g., fuse or resistor) to limit follow current.
What PCB layout practices are critical to maximize surge current handling and thermal performance of the 1.5KE12A in a through-hole design?
To maximize surge handling and thermal performance of the 1.5KE12A, use wide, short PCB traces (minimize inductance) between the TVS and protected line, especially for high di/dt transients. Route high-current paths directly to input power and ground planes with multiple vias to reduce impedance. Use at least 20 mil trace width and keep connections under 1 inch where possible to limit parasitic inductance that can overshoot the 16.7V clamping level. For thermal management, connect leads to larger copper areas (even on single-layer boards) to improve heat dissipation during repetitive surges, and avoid placing near other heat-generating components to ensure the junction stays within the -55°C to 175°C operating range under full 1500W pulse loads.
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.
1.5KE12A CAD Models
Meritek 1.5KE12A PCB symbols & footprints
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