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51939-121
Amphenol ICC (FCI)
CONN HEADER BLADE PWR 5P EDGE MT
13518 Pcs New Original In Stock
5 Connector Header, Male Blades Board Edge, Through Hole, Right Angle Black Blade Power
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*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (415 Ratings)
51939-121
Product Overview
1369174
DiGi Electronics Part Number
51939-121-DGManufacturer
Amphenol ICC (FCI)
51939-121
Description
CONN HEADER BLADE PWR 5P EDGE MTInventory
13518 Pcs New Original In Stock
5 Connector Header, Male Blades Board Edge, Through Hole, Right Angle Black Blade Power
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
How to Order
Shipping & Delivery
Quality Assurance
365 - Day Quality Guarantee - Every part fully backed.
90 - Day Refund or Exchange - Defective parts? No hassle.
Limited Stock, Order Now - Get reliable parts without worry.
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51939-121 Technical Specifications
Category
Backplane Connectors, Specialized
Packaging
-
Series
PwrBlade®
Product Status
Obsolete
Connector Usage
-
Connector Type
Header, Male Blades
Connector Style
Blade Power
Number of Positions
5
Number of Positions Loaded
All
Pitch
0.100" (2.54mm)
Number of Rows
1
Number of Columns
-
Mounting Type
Board Edge, Through Hole, Right Angle
Termination
Solder
Contact Layout, Typical
5 Power
Features
Mating Guide
Contact Finish
Gold or Gold, GXT™
Contact Finish Thickness
30.0µin (0.76µm)
Color
Black
Current Rating (Amps)
-
Material Flammability Rating
UL94 V-0
Operating Temperature
-20°C ~ 105°C
Voltage Rating
-
Base Product Number
51939
Datasheet & Documents
HTML Datasheet
51939-121-DG
Environmental & Export Classification
RoHS Status
RoHS non-compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
ECCN
EAR99
HTSUS
8536.69.4040
Additional Information
Standard Package
528
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
豐富的產品選擇使我能快速找到所需，有多樣化的選擇真的很棒！
de desembre 02, 2025
This was one of the best shopping experiences thanks to their excellent support and logistics.
de desembre 02, 2025
DiGi Electronics maintains a high standard for product quality, ensuring that every item functions perfectly upon arrival.
de desembre 02, 2025
Support staff at DiGi Electronics are courteous and always eager to assist.
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Frequently Asked Questions (FAQ)
Can the 51939-121 PwrBlade® connector be used in high-reliability power applications given its RoHS non-compliant status and obsolete product status?
The 51939-121 PwrBlade® connector, while robust in design with GXT™ gold-plated contacts and UL94 V-0 rated materials, carries significant supply chain and compliance risks due to its RoHS non-compliant status and obsolete product designation. For high-reliability applications—especially in medical, industrial, or long-lifecycle systems—this increases the risk of future component shortages and non-compliance with environmental regulations. We recommend evaluating the RoHS-compliant 51939-121LF as a drop-in replacement where possible, or designing in a current-series alternative early in the design phase to avoid costly redesigns later. Always verify long-term availability with your distributor.
What are the main mechanical integration risks when replacing a standard power header with the 51939-121 in a right-angle board edge configuration?
When integrating the 51939-121 PwrBlade® connector in a right-angle, board edge through-hole layout, designers must account for mechanical stress on solder joints due to asymmetric loading during mating cycles. The connector's blade-style design and lack of polarization features on mating parts increase the risk of misalignment, especially in blind-mate or high-vibration environments. To mitigate risk, reinforce solder joints with adhesive, ensure precise alignment in the mating connector (e.g., using guide pins), and avoid stacking multiple connectors without proper support to prevent torque on the PCB edge.
How does the 51939-121 compare to Molex SL Series power connectors in terms of current handling and thermal performance in dense layouts?
The 51939-121 PwrBlade® connector lacks a published current rating, which creates design uncertainty when compared to Molex SL Series connectors (e.g., Molex 47054-1000), which specify 9A per contact at 20°C rise. In high-density power routing, this lack of thermal data makes it difficult to model temperature rise accurately, especially when adjacent contacts carry high current. Additionally, the 51939-121's 2.54mm pitch limits thermal derating headroom. For reliable performance, use conservative current limits (≤6A per pin with wide copper pours), monitor contact temperature in prototype testing, and consider the Molex SL Series as a thermally characterized alternative.
What are the implications of using the obsolete 51939-121 PwrBlade® connector in a new product design intended for 10+ year service?
Using the obsolete 51939-121 PwrBlade® connector in a new design risks long-term field reliability and repairability. While 13,506 units are currently in stock, no future production is planned, creating a single-buy component risk. This can lead to end-of-life procurement challenges and costly redesigns for spares or upgrades. For 10+ year service life, we strongly recommend developing a second-source strategy—such as qualifying the compatible 51939-121LF or switching to a current-series connector like Amphenol's PwrBlade+—to ensure continuity, especially in industrial or transportation applications where service parts are critical.
Is the gold flash finish (30µin) on the 51939-121 sufficient for reliable mating cycles in harsh environments with frequent thermal cycling?
The 30.0µin (0.76µm) GXT™ gold plating on the 51939-121 PwrBlade® connector provides good corrosion resistance and low contact resistance, suitable for up to 50-100 mating cycles under controlled conditions. However, in harsh environments with frequent thermal cycling (-20°C to 105°C) or contamination (dust, moisture), the thin gold layer may wear through, exposing base metal and increasing contact resistance. For high-reliability deployments, especially where maintenance access is limited, consider conformal coating the connector area, minimizing mechanical vibration, or specifying connectors with thicker gold plating (e.g., 50µin) to extend operational life.
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.
51939-121 CAD Models
Amphenol ICC (FCI) 51939-121 PCB symbols & footprints
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