Equivalent & Substitute Parts for 600R150-RAZR

Part Overview

The 600R150-RAZR is a Polymeric PTC Resettable Fuse manufactured by Littelfuse Inc. as part of the POLY-FUSE® 600R series. This component is rated for 60V 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 suitable substitute components essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Voltage - Max	60V (600V Int)
Current - Hold (Ih) (Max)	150 mA
Current - Trip (It)	300 mA
Current - Max	3 A
Mounting Type	Through Hole
Package / Case	Radial, Disc
Lead Spacing	0.201" (5.10mm)
Operating Temperature	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 600R150-RAZR is determined by strict equivalence across the following critical parameters:

Voltage rating: 60V (600V Int) maximum
Current hold specification: 150 mA (Ih)
Current trip specification: 300 mA (It)
Mounting configuration: Through hole radial disc
Physical dimensions: 0.354" L x 0.181" W (9.00mm x 4.60mm)
Lead spacing: 0.201" (5.10mm)
Operating temperature range: -40°C ~ 85°C
Regulatory compliance: cURus, TUV approval; ROHS3 compliant

The 600R150-RBZR meets all substitution criteria. Minor variations in initial resistance (Ri) and post-trip resistance (R1) fall within acceptable tolerance ranges for this component category. The substitute part maintains identical voltage, current, mounting, and dimensional specifications while offering active product status and improved availability.

Parameter Comparison

Parameter	600R150-RAZR (Main)	600R150-RBZR (Substitute)
Manufacturer	Littelfuse Inc.	Littelfuse Inc.
Series	POLY-FUSE® 600R	POLY-FUSE® 600R
Product Status	Obsolete	Active
Type	Polymeric	Polymeric
Voltage - Max	60V (600V Int)	60V (600V Int)
Current - Hold (Ih) (Max)	150 mA	150 mA
Current - Trip (It)	300 mA	300 mA
Current - Max	3 A	3 A
Time to Trip	4 s	3 s
Resistance - Initial (Ri) (Min)	7 Ohms	9 Ohms
Resistance - Post Trip (R1) (Max)	20 Ohms	22 Ohms
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Through Hole	Through Hole
Package / Case	Radial, Disc	Radial, Disc
Size / Dimension	0.354" L x 0.181" W (9.00mm x 4.60mm)	0.354" L x 0.181" W (9.00mm x 4.60mm)
Height - Seated (Max)	0.492" (12.50mm)	0.492" (12.50mm)
Lead Spacing	0.201" (5.10mm)	0.201" (5.10mm)
Approval Agency	cURus, TUV	cURus, TUV
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Packaging	-	Cut Tape (CT)
Inventory Status	663 Pcs New Original In Stock	2500 Pcs New Original In Stock

Engineering Selection Recommendations

The 600R150-RBZR is a direct functional equivalent to the 600R150-RAZR. Both components are manufactured by Littelfuse Inc. within the POLY-FUSE® 600R series and maintain identical electrical ratings, mechanical dimensions, and regulatory certifications (cURus, TUV approval; ROHS3 compliance).

The primary advantage of selecting 600R150-RBZR is its active product status, which ensures long-term availability and supply chain continuity. The 600R150-RAZR is obsolete and subject to limited stock availability. The substitute part is available in significantly higher quantities (2500 pcs versus 663 pcs), supporting both immediate requirements and future production needs.

Minor parameter variations between the two parts—specifically time to trip (4 s versus 3 s), initial resistance (7 Ohms versus 9 Ohms), and post-trip resistance (20 Ohms versus 22 Ohms)—remain within acceptable operational tolerances for polymeric PTC resettable fuse applications and do not affect functional compatibility in standard circuit protection applications.

Frequently Asked Questions (FAQ)

Q: Can 600R150-RBZR be used as a direct replacement for 600R150-RAZR in existing designs?

A: Yes. Both parts share identical voltage ratings (60V), current specifications (150 mA hold, 300 mA trip), mounting configuration (through-hole radial disc), physical dimensions (9.00mm x 4.60mm), and regulatory approvals (cURus, TUV; ROHS3). The parts are electrically and mechanically interchangeable.

Q: What are the differences between these two parts?

A: The primary differences are product status and minor resistance characteristics. The 600R150-RAZR is obsolete; the 600R150-RBZR is active. Time to trip differs by 1 second (4 s versus 3 s). Initial resistance varies by 2 Ohms (7 Ohms versus 9 Ohms), and post-trip resistance by 2 Ohms (20 Ohms versus 22 Ohms). These variations are within normal tolerance ranges for this component category.

Q: Does packaging differ between these parts?

A: Yes. The 600R150-RAZR packaging is not specified in available data. The 600R150-RBZR is supplied in Cut Tape (CT) packaging. Both parts maintain identical through-hole radial disc configuration and lead spacing (0.201" / 5.10mm), ensuring compatibility with standard PCB layouts.

Q: Are both parts RoHS compliant?

A: Yes. Both 600R150-RAZR and 600R150-RBZR are ROHS3 compliant and carry cURus and TUV approvals, meeting current regulatory requirements for electronic component use.

Q: Which part should be selected for new designs?

A: The 600R150-RBZR is the appropriate selection for new designs. It maintains full functional equivalence to the 600R150-RAZR while offering active product status, ensuring availability for current and future production requirements.

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