600R160-RAF Equivalent & Substitute Parts

Part Overview

The 600R160-RAF is a Polymeric PTC Resettable Fuse manufactured by Littelfuse Inc., rated for 60V maximum voltage with 160 mA hold current. This component is classified as Obsolete, making identification of suitable substitute parts essential for ongoing system support and new design implementations. The 600R160-RAF operates as a thermal protection device, automatically resetting after fault conditions are cleared, and is commonly used in circuit protection applications requiring reliable overcurrent response.

Substiute Parts

600R160-RAF

Littelfuse Inc.In Stock: 4003600R160-RAF Datasheet

Current PartRFQ

TRF600-160

Littelfuse Inc.In Stock: 2062TRF600-160 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 600R160-RAF is determined by the following critical parameters:

Electrical Compatibility:

• Current rating: Hold current (Ih) of 160 mA and trip current (It) of 320 mA must be maintained
• Voltage rating: Maximum voltage must equal or exceed the 60V specification
• Resistance characteristics: Initial resistance (Ri) and post-trip resistance (R1) must fall within acceptable ranges for circuit operation

Mechanical Compatibility:

• Mounting type: Through Hole configuration required
• Package style: Radial, Disc form factor
• Physical dimensions: Lead spacing and overall size must accommodate existing PCB layouts
• Height constraints: Seated height must not exceed 0.496" (12.60mm)

Regulatory & Compliance:

• RoHS3 compliance required
• Approval agencies: CSA, TUV, or UL certification acceptable
• Moisture sensitivity: MSL 1 rating preferred

The TRF600-160 meets these substitution criteria while offering improved product status and expanded certifications.

Parameter Comparison

Engineering Selection Recommendations

The TRF600-160 is the primary substitute for the obsolete 600R160-RAF based on the following engineering criteria:

Product Status & Availability: The 600R160-RAF is classified as Obsolete, making the Active-status TRF600-160 the appropriate long-term solution for new designs and ongoing production support.

Electrical Performance: The TRF600-160 maintains identical hold current (160 mA) and trip current (320 mA) specifications, ensuring equivalent circuit protection behavior. The higher voltage rating (250V vs. 60V) provides additional design margin for 60V applications without compromising performance. The extended time-to-trip specification (18 s vs. 10 s) must be evaluated against circuit transient tolerance requirements.

Mechanical & Physical Compatibility: Both components share identical package geometry, mounting type, and physical dimensions. The minimal lead spacing difference (0.201" vs. 0.197") presents no practical PCB layout constraints for standard through-hole assembly processes.

Regulatory & Compliance: The TRF600-160 carries expanded certification coverage (CSA, TUV, UL) compared to the 600R160-RAF (cURus, TUV), providing broader market acceptance and regulatory compliance. Both components maintain ROHS3 compliance and MSL 1 ratings.

Frequently Asked Questions (FAQ)

Q: Can the TRF600-160 directly replace the 600R160-RAF in existing designs?

A: Yes, the TRF600-160 is mechanically and electrically compatible for direct substitution in applications operating at 60V or below. The identical hold current (160 mA), trip current (320 mA), and physical dimensions ensure PCB-level compatibility. The extended time-to-trip specification (18 s vs. 10 s) must be evaluated for circuit-specific transient response requirements.

Q: What is the significance of the voltage rating difference between these parts?

A: The 600R160-RAF is rated for 60V maximum, while the TRF600-160 is rated for 250V maximum. Both components operate safely at 60V. The higher rating on the TRF600-160 provides additional design margin and is suitable for applications requiring higher voltage capability without affecting performance at lower voltages.

Q: Are there any lead spacing concerns with the 0.004" difference between parts?

A: The lead spacing difference (0.201" vs. 0.197") is minimal and falls within standard PCB manufacturing tolerances for through-hole component placement. No design modifications are required for direct substitution on existing PCB layouts.

Q: Why does the TRF600-160 have a longer time-to-trip specification?

A: The TRF600-160 specifies 18 seconds to trip compared to 10 seconds for the 600R160-RAF. This difference reflects the thermal response characteristics of the polymeric PTC material under the specified test conditions. Circuit designers must confirm that the extended trip time is acceptable for the intended overcurrent protection application.

Q: What certifications does the TRF600-160 carry?

A: The TRF600-160 holds CSA, TUV, and UL approvals, providing broader regulatory coverage than the 600R160-RAF (cURus, TUV). Both components are ROHS3 compliant with MSL 1 moisture sensitivity ratings.

Q: Is the TRF600-160 currently in production?

A: Yes, the TRF600-160 is classified as Active product status, ensuring ongoing availability and manufacturing support. The 600R160-RAF is Obsolete and no longer manufactured.