TRF600-150-RB-2 Equivalent & Substitute Parts

Part Overview

The TRF600-150-RB-2 is a polymeric PTC resettable fuse manufactured by Littelfuse Inc., part of the PolySwitch® TRF600 series. This component is rated for 250V maximum voltage with a 150 mA hold current and is designed for through-hole radial mounting in disc configuration. The part is currently listed as obsolete, making identification of equivalent and substitute parts essential for ongoing system support and component procurement.

Substiute Parts

TRF600-150-RB-2

Littelfuse Inc.In Stock: 871TRF600-150-RB-2 Datasheet

Current PartRFQ

TRF600-150-RB

Littelfuse Inc.In Stock: 1415TRF600-150-RB Datasheet

DirectRFQ

600R150-RBZR

Littelfuse Inc.In Stock: 2542600R150-RBZR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for polymeric PTC resettable fuses is determined by the following critical parameters:

Electrical Compatibility Parameters:

• Voltage rating (maximum voltage must equal or exceed the application requirement)
• Current hold rating (Ih) must match the protected circuit's normal operating current
• Current trip rating (It) must align with fault protection thresholds
• Resistance characteristics (initial and post-trip) must be compatible with circuit design

Mechanical Compatibility Parameters:

• Mounting type (through-hole radial configuration)
• Package form factor (radial disc)
• Physical dimensions and lead spacing (must fit existing PCB layouts)

Regulatory & Compliance Parameters:

• RoHS compliance status
• Approval agency certifications (CSA, TUV, UL)
• Product status (active vs. obsolete)

The TRF600-150-RB-2 has two identified substitutes based on these criteria:

1. TRF600-150-RB (Direct equivalent, same electrical and mechanical specifications, active product status)
2. 600R150-RBZR (Manufacturer-recommended alternative with voltage rating difference)

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: TRF600-150-RB

The TRF600-150-RB is the direct equivalent to the obsolete TRF600-150-RB-2. This part maintains identical electrical specifications (250V maximum voltage, 150 mA hold current, 300 mA trip current) and mechanical configuration (through-hole radial disc, 9.00mm x 4.60mm dimensions). The TRF600-150-RB holds active product status with full compliance to ROHS3 standards and maintains CSA, TUV, and UL certifications. This part is the recommended choice for direct replacement in existing designs.

Alternative Substitute: 600R150-RBZR

The 600R150-RBZR is a manufacturer-recommended alternative from the POLY-FUSE® 600R series. This part shares identical hold current (150 mA), trip current (300 mA), resistance characteristics, and operating temperature range with the main part. However, the maximum voltage rating is 60V compared to the 250V rating of the TRF600-150-RB-2. The 600R150-RBZR is suitable only for applications where the circuit voltage does not exceed 60V. This part is active and ROHS3 compliant with cURus and TUV certifications. Lead spacing is 0.201" (5.10mm) versus 0.197" (5.00mm) for the main part, representing a 0.10mm difference that may require PCB layout verification.

Frequently Asked Questions (FAQ)

Q: Can TRF600-150-RB directly replace TRF600-150-RB-2 without design changes?

A: Yes. The TRF600-150-RB is electrically and mechanically identical to the TRF600-150-RB-2. Both parts feature 250V maximum voltage, 150 mA hold current, and identical physical dimensions. No circuit modifications are required.

Q: What is the key difference between TRF600-150-RB and 600R150-RBZR?

A: The primary difference is voltage rating. The TRF600-150-RB is rated for 250V maximum, while the 600R150-RBZR is rated for 60V maximum. Both maintain identical current ratings (150 mA hold, 300 mA trip) and resistance characteristics. Selection depends on the application's voltage requirements.

Q: Can 600R150-RBZR be used in a 250V circuit?

A: No. The 600R150-RBZR maximum voltage rating is 60V. Using this part in a 250V circuit exceeds its voltage specification and violates electrical safety requirements.

Q: Are there packaging differences between the substitutes?

A: Yes. The TRF600-150-RB is supplied in Bag packaging, while the 600R150-RBZR is supplied in Cut Tape (CT) packaging. The main part TRF600-150-RB-2 packaging is not specified. Packaging affects procurement and assembly processes but does not impact electrical or mechanical compatibility.

Q: What is the lead spacing difference between TRF600-150-RB and 600R150-RBZR?

A: The TRF600-150-RB has 0.197" (5.00mm) lead spacing, while the 600R150-RBZR has 0.201" (5.10mm) lead spacing. This 0.10mm difference is minimal but should be verified against PCB hole spacing to ensure proper fit.

Q: Are all three parts RoHS compliant?

A: Yes. All three parts (TRF600-150-RB-2, TRF600-150-RB, and 600R150-RBZR) are ROHS3 compliant.

Q: What certifications apply to each part?

A: TRF600-150-RB-2 and TRF600-150-RB hold CSA, TUV, and UL certifications. The 600R150-RBZR holds cURus and TUV certifications. Verify that the selected part's certifications meet your application requirements.