TRF600-150-RB Equivalent & Substitute Parts

Part Overview

The TRF600-150-RB is a polymeric PTC resettable fuse manufactured by Littelfuse Inc., part of the PolySwitch® TRF600 series. This through-hole radial disc component provides overcurrent protection at 250V with a 150 mA hold current rating. The part is active in production with 1311 units currently in stock. Substitute parts may be required due to inventory constraints, packaging preferences, or specific application voltage requirements while maintaining core electrical protection characteristics.

Substiute Parts

TRF600-150-RB

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

Current PartRFQ

600R150-RBZR

Littelfuse Inc.In Stock: 2542600R150-RBZR Datasheet

MFR RecommendedRFQ

TRF600-150-RB-B-0.5

Littelfuse Inc.In Stock: 1230TRF600-150-RB-B-0.5 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TRF600-150-RB are classified based on the following substitution criteria:

Parametric Equivalent (Full Compatibility): Parts maintaining identical electrical specifications including voltage rating (250V), hold current (150 mA), trip current (300 mA), resistance characteristics, and thermal operating range. These parts differ only in packaging format or minor mechanical tolerances.

Manufacturer Recommended Substitute (Functional Compatibility with Voltage Derating): Parts sharing the same hold current (150 mA), trip current (300 mA), resistance profile, and thermal range, but with reduced maximum voltage rating (60V vs. 250V). This substitute is suitable for applications operating below 60V where the lower voltage rating does not compromise circuit protection.

The following parameters determine substitution eligibility:

• Current - Hold (Ih): Must remain 150 mA
• Current - Trip (It): Must remain 300 mA
• Resistance - Initial (Ri): Must remain 9 Ohms (Min)
• Resistance - Post Trip (R1): Must remain 22 Ohms (Max)
• Operating Temperature: Must remain -40°C ~ 85°C
• Mounting Type: Must remain Through Hole
• Package / Case: Must remain Radial, Disc

Parameter Comparison

Engineering Selection Recommendations

TRF600-150-RB-B-0.5 (Parametric Equivalent): Select this substitute when packaging format (bag vs. alternative) is the primary consideration. All electrical and mechanical parameters are identical to the main part. Both parts carry equivalent regulatory approvals (CSA, TUV, UL) and ROHS3 compliance. Lead spacing tolerance is identical at 0.197" (5.00mm), ensuring direct PCB compatibility.

600R150-RBZR (Manufacturer Recommended Substitute): Select this substitute only for applications where the circuit operates at voltages not exceeding 60V. This part maintains identical hold current, trip current, resistance characteristics, and thermal operating range. The reduced maximum current rating (3 A vs. 40 A) reflects the lower voltage class. Regulatory approvals differ (cURus, TUV vs. CSA, TUV, UL); verify compliance requirements for your specific application. Lead spacing tolerance is 0.201" (5.10mm), a 0.004" (0.10mm) variation from the main part; confirm PCB pad spacing compatibility before selection. Higher inventory availability (2500 units) and cut tape packaging may provide supply chain advantages.

All three parts are active products with ROHS3 compliance and REACH unaffected status.

Frequently Asked Questions (FAQ)

Q: Can TRF600-150-RB-B-0.5 be used as a direct replacement for TRF600-150-RB?

A: Yes. TRF600-150-RB-B-0.5 is a parametric equivalent with identical electrical specifications, thermal range, and mechanical dimensions. The only difference is packaging format (bag). Both parts are approved by CSA, TUV, and UL. Lead spacing is identical at 0.197" (5.00mm).

Q: Under what conditions can 600R150-RBZR substitute for TRF600-150-RB?

A: 600R150-RBZR is suitable only for circuits operating at voltages not exceeding 60V. The hold current (150 mA), trip current (300 mA), resistance profile, and thermal operating range are identical. The reduced maximum current rating (3 A) is appropriate for the lower voltage class. Verify that your application voltage does not exceed 60V before selecting this substitute.

Q: Are there PCB compatibility concerns with 600R150-RBZR?

A: Lead spacing for 600R150-RBZR is 0.201" (5.10mm), compared to 0.197" (5.00mm) for the main part. This 0.004" (0.10mm) difference is minor but should be confirmed against your PCB pad spacing to ensure proper fit and solder joint quality.

Q: Do all three parts have the same regulatory approvals?

A: No. TRF600-150-RB and TRF600-150-RB-B-0.5 are approved by CSA, TUV, and UL. 600R150-RBZR is approved by cURus and TUV. Verify that the approvals for your selected substitute meet your application and regional compliance requirements.

Q: Which substitute offers better inventory availability?

A: 600R150-RBZR has the highest inventory at 2500 units and is supplied in cut tape packaging, which may provide supply chain advantages. TRF600-150-RB-B-0.5 has 1124 units in stock. The main part TRF600-150-RB has 1311 units available in bag packaging.

Q: Are all three parts RoHS compliant?

A: Yes. All three parts are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements.