CSA17 Equivalent & Substitute Parts

Part Overview

The CSA17 is a Solid State SPST-NO (1 Form A) relay manufactured by Coto Technology, part of the COTOMOS™ series. This component operates with a 1.2VDC input and supports AC/DC loads up to 350V at 120mA, featuring a maximum on-state resistance of 30 Ohms. The CSA17 is classified as obsolete, making identification of suitable substitutes necessary for ongoing system maintenance and new design implementations. With 1900 pieces available in stock, alternative solutions must maintain equivalent electrical performance and surface mount compatibility.

Substiute Parts

CSA17

Coto TechnologyIn Stock: 1993CSA17 Datasheet

Current PartRFQ

CPC1025NTR

IXYS Integrated Circuits DivisionIn Stock: 89436CPC1025NTR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CSA17 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Requirements:

• Input voltage: 1.2VDC
• Load voltage range: minimum 350V support (higher ranges are acceptable)
• Load current: 120 mA (must match or exceed)
• On-state resistance: 30 Ohms maximum
• Circuit type: SPST-NO (1 Form A)
• Output type: AC and DC capability

Mechanical Compatibility Requirements:

• Mounting type: Surface Mount
• Termination style: Gull Wing
• Pin configuration compatibility with PCB design

Regulatory Compliance:

• RoHS3 Compliant
• REACH Unaffected

The substitute part CPC1025NTR meets all electrical requirements with extended load voltage capability (0V ~ 400V) and maintains identical input voltage, load current, and on-state resistance specifications. The primary distinction is the package form factor (4-SOP vs. 8-SMD), which requires PCB layout compatibility verification.

Parameter Comparison

Engineering Selection Recommendations

The CPC1025NTR is suitable as a direct electrical substitute for the CSA17. Both components maintain identical input voltage (1.2VDC), load current (120 mA), and on-state resistance (30 Ohms) specifications. The CPC1025NTR provides enhanced voltage handling capability (400V vs. 350V), meeting or exceeding the operational envelope of the CSA17.

The CPC1025NTR holds active product status from IXYS Integrated Circuits Division, ensuring continued availability and supply chain stability. Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for industrial and commercial applications.

The primary consideration for implementation is package geometry. The CSA17 uses an 8-SMD (0.300", 7.62mm) footprint, while the CPC1025NTR uses a smaller 4-SOP (0.150", 3.81mm) package. PCB layout modifications are required to accommodate the different footprint dimensions and pin configurations. The CPC1025NTR also carries a higher moisture sensitivity level (MSL 3 vs. MSL 2), requiring attention to handling and storage conditions during assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the CPC1025NTR directly replace the CSA17 without circuit modifications? A: The CPC1025NTR maintains electrical equivalence for input voltage, load current, and on-state resistance. However, PCB layout redesign is required due to different package footprints (8-SMD vs. 4-SOP). Pin-to-pin electrical compatibility must be verified against specific application schematics.

Q: What is the significance of the load voltage difference (350V vs. 400V)? A: The CPC1025NTR supports a maximum load voltage of 400V, compared to the CSA17's 350V specification. This provides additional design margin for applications operating near the upper voltage limit. Both components remain suitable for systems designed within the 350V envelope.

Q: How do the moisture sensitivity levels affect component handling? A: The CSA17 (MSL 2, 1 Year) allows longer shelf life and storage conditions compared to the CPC1025NTR (MSL 3, 168 Hours). For assembly environments, the CPC1025NTR requires more stringent moisture control protocols and shorter handling windows from bag opening to reflow soldering.

Q: Is the CPC1025NTR's smaller package size an advantage or limitation? A: The compact 4-SOP footprint of the CPC1025NTR enables reduced PCB real estate compared to the 8-SMD package. This represents a design advantage for space-constrained applications but necessitates PCB layout redesign and validation of thermal and electrical performance in the target circuit.

Q: Are there supply chain advantages to using the CPC1025NTR? A: The CPC1025NTR maintains active product status with substantial inventory availability (89,400 pieces in stock), providing long-term supply security compared to the obsolete CSA17 status. This is the primary justification for transitioning to the CPC1025NTR in new designs or device refreshes.