Product Introduction
Need to replace an HP 120W AC adapter with a 19.5V 6.15A output and 4.5mm x 3.0mm Blue Tip connector? The HP TPN-CA19, associated with M95377-001 and L41856-001, is a 120W Smart AC adapter designed for compatible HP laptops, mobile workstations, and selected HP docking systems that require this specific power configuration.
When selecting a replacement, matching the wattage alone is not enough. The output voltage, current rating, connector size, Blue Tip design, and Smart Pin configuration should all be checked against the original adapter and the requirements of your HP device.
Application Scenarios
- Business laptops and professional office computing
- Mobile workstations used for engineering, CAD, and design applications
- Professional laptops requiring a 120W HP Smart AC adapter
- Corporate and enterprise IT equipment deployments
- Selected HP docking and workstation configurations requiring 19.5V power
Technical Specifications
| Brand | HP |
| Model | TPN-CA19 |
| Part Number | M95377-001 |
| Spare Number | L41856-001 |
| Output Voltage | 19.5V DC |
| Output Current | 6.15A |
| Power Rating | 120W |
| Connector | 4.5mm x 3.0mm Blue Tip with Smart Pin |
| Polarity | Center Positive |
| Input Voltage | 100-240V AC, 50/60Hz |
| Protection | Over Voltage, Over Current, and Short Circuit Protection |
| Condition | Replacement AC Power Adapter |
Compatibility Check
This adapter should be selected based on the complete electrical and connector configuration rather than wattage alone. Before using a replacement, compare the original adapter label and the device requirements for:
- Output: 19.5V DC
- Power: 120W / 6.15A
- Connector: 4.5mm x 3.0mm Blue Tip
- Smart Pin: Required where the compatible HP system uses the Smart Pin identification design
- Polarity: Center positive
A matching connector does not by itself guarantee compatibility. HP devices within the same product family can have different power requirements, so the exact computer or docking configuration should be verified before selecting a replacement adapter.
Compatible Part Numbers & Device Categories
- HP TPN-CA19
- HP M95377-001
- HP L41856-001
- Selected HP systems requiring a 120W 19.5V Smart AC adapter
- Selected HP EliteBook configurations
- Selected HP ProBook configurations
- Selected HP ZBook mobile workstation configurations
- Selected HP docking systems using the corresponding power input
Important: Compatibility can vary by exact model and configuration. Verify the original adapter part number, output rating, connector size, and device requirements before replacement.
Understanding the Blue Tip Smart Pin Connector
The 4.5mm x 3.0mm Blue Tip connector is commonly used on compatible HP power systems. The Smart Pin design adds an identification contact used by supported HP equipment to recognize the attached AC adapter.
This means that connector appearance alone is not always enough when selecting a replacement. A plug may have the same barrel dimensions but still differ in its internal configuration or identification characteristics.
For the most reliable match, compare the complete connector with the original adapter rather than selecting a replacement based only on “4.5mm x 3.0mm” or “HP Blue Tip.”
Common Compatibility Questions
Q1: Can this replace a 90W HP adapter?
It may be suitable for a compatible HP system when the device supports a 19.5V input and the same 4.5mm x 3.0mm Smart Pin connector. A higher power rating should not be used as the only compatibility criterion.
Q2: What does the Smart Pin connector do?
The Smart Pin provides an identification function used by compatible HP equipment to recognize the connected power adapter and support the expected power-management behavior.
Q3: Is this compatible with HP ZBook mobile workstations?
It can be suitable for selected ZBook configurations that require a 120W HP Smart AC adapter with the corresponding connector and electrical output. Verify the exact ZBook model and configuration before replacement.
Q4: Can any HP 120W charger with a blue tip replace this adapter?
No. The output voltage, current capacity, connector dimensions, and Smart Pin configuration should all match the requirements of the HP device.
Q5: Why does my HP laptop power on but not charge correctly?
Possible causes include an incorrect adapter configuration, a damaged Smart Pin contact, a worn DC jack, a damaged cable, or a battery or charging-system issue.
Q6: Is 19.5V 6.15A the same as 120W?
Yes. 19.5V multiplied by 6.15A equals approximately 120W, which is why this adapter is classified as a 120W power adapter.
Related HP Power Adapter Guide
For a deeper explanation of the HP M95377-001, L41856-001, and TPN-CA19 identifiers, Blue Tip connector compatibility, Smart Pin identification, and replacement considerations, see our HP M95377-001 120W Smart AC Adapter Guide.
This guide is especially useful when you are unsure whether a similar-looking HP 120W adapter has the same electrical and connector configuration.
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