TRF600-150-RC Polymeric PTC Resettable Fuse - Equivalent & Substitute Parts

Part Overview

The TRF600-150-RC is a polymeric PTC resettable fuse manufactured by Littelfuse Inc. in the PolySwitch® TRF600 series. This component provides overcurrent protection with automatic reset capability in through-hole radial disc configuration. The part is active in production with 819 units currently in stock. Substitute parts may be required due to packaging availability, lead time optimization, or inventory allocation across distribution channels.

Substiute Parts

TRF600-150-RC

Littelfuse Inc.In Stock: 899TRF600-150-RC Datasheet

Current PartRFQ

TRF600-150-RB

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

Parametric EquivalentRFQ

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-RC are determined by electrical and mechanical parameter equivalence within the PolySwitch® TRF600 series. The following criteria establish substitution validity:

Electrical Parameters (Must Match):

• Voltage rating: 250V (600V Int)
• Current hold (Ih): 150 mA maximum
• Current trip (It): 300 mA
• Time to trip: 3 seconds
• Initial resistance (Ri): 9 Ohms minimum
• Post-trip resistance (R1): 22 Ohms maximum
• Operating temperature: -40°C ~ 85°C

Mechanical Parameters (Must Match):

• Mounting type: Through hole
• Package type: Radial disc
• Physical dimensions: 0.354" L x 0.181" W (9.00mm x 4.60mm)
• Height seated: 0.492" (12.50mm) maximum
• Lead spacing: 0.197" (5.00mm)

Compliance Parameters (Must Match):

• Approval agencies: CSA, TUV, UL
• RoHS status: ROHS3 Compliant
• Moisture sensitivity: MSL 1

The identified substitutes TRF600-150-RB and TRF600-150-RB-B-0.5 meet all electrical, mechanical, and compliance requirements. Differences exist only in packaging format (radial vs. bag) and inventory levels.

Parameter Comparison

Engineering Selection Recommendations

All three parts—TRF600-150-RC, TRF600-150-RB, and TRF600-150-RB-B-0.5—are active production components from Littelfuse Inc. with identical electrical and mechanical specifications. Selection between these parts is based on packaging format and inventory availability rather than functional performance.

TRF600-150-RC is supplied in radial packaging format. TRF600-150-RB and TRF600-150-RB-B-0.5 are supplied in bag packaging format. All three parts carry CSA, TUV, and UL approvals and meet ROHS3 compliance requirements. MSL rating of 1 (Unlimited) indicates no moisture sensitivity constraints during storage or handling.

For applications requiring through-hole radial disc mounting with 150 mA hold current and 250V rated voltage, any of these three parts satisfy the functional and compliance requirements. Selection should prioritize inventory availability and packaging requirements specific to manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can TRF600-150-RB or TRF600-150-RB-B-0.5 be used as direct replacements for TRF600-150-RC?

A: Yes. All three parts are electrically and mechanically equivalent. They share identical voltage ratings (250V / 600V Int), current specifications (150 mA Ih, 300 mA It), resistance values, operating temperature range, physical dimensions, lead spacing, and approval certifications. The only difference is packaging format (radial vs. bag).

Q: What is the difference between TRF600-150-RB and TRF600-150-RB-B-0.5?

A: Both parts are electrically and mechanically identical with all parameters matching. The designation suffix "-B-0.5" indicates a packaging or tape configuration variant. Functional performance in circuit applications is equivalent.

Q: Are there any compliance or certification differences between these parts?

A: No. All three parts carry identical approvals (CSA, TUV, UL), meet ROHS3 compliance, and have MSL rating of 1 (Unlimited). No compliance or certification differences exist.

Q: Can these parts be used in applications requiring 600V internal rating?

A: These parts are rated for 250V maximum voltage with 600V internal rating. The 600V internal rating indicates the component's internal voltage withstand capability. Circuit design must not exceed the 250V maximum rated voltage.

Q: What is the significance of the 3-second time to trip specification?

A: Time to trip of 3 seconds indicates the duration required for the polymeric PTC element to transition from normal state to high-resistance tripped state when subjected to the trip current (300 mA). This parameter is identical across all three substitute parts.

Q: Are these parts suitable for applications with -40°C to 85°C temperature extremes?

A: Yes. All three parts are rated for continuous operation across the -40°C to 85°C temperature range. Operating temperature specifications are identical.