PFRX.160.2 Polymeric PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The PFRX.160.2 is a polymeric PTC resettable fuse manufactured by SCHURTER Inc., rated for 60V maximum voltage with 1.6A hold current. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs. The PFRX.160.2 operates across the -40°C to 85°C temperature range and meets ROHS3 compliance requirements with CSA, TUV, and UR approvals.

Key Parameters

Parameter	Value
Voltage - Max	60V
Current - Hold (Ih) (Max)	1.6 A
Current - Trip (It)	3.2 A
Current - Max	40 A
Time to Trip	11.4 s
Resistance - Initial (Ri) (Min)	90 mOhms
Resistance - Post Trip (R1) (Max)	220 mOhms
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	Radial, Disc
Type	Polymeric

Substitute Part Grouping Explanation

Substitution for the PFRX.160.2 is determined by strict electrical and mechanical parameter matching. The primary substitution criteria are:

Electrical Parameters (Critical): Maximum voltage rating, hold current (Ih), trip current (It), initial resistance (Ri), and post-trip resistance (R1) must be identical or functionally equivalent within the specified tolerances.

Mechanical Parameters (Critical): Through-hole radial disc mounting configuration, lead spacing, and physical dimensions must accommodate the same PCB footprint.

Thermal Parameters: Operating temperature range must encompass -40°C to 85°C.

Compliance: RoHS3 compliance is required; additional certifications (CSA, TUV, UL, cURus) enhance compatibility but are not substitution blockers.

Substitute parts are grouped into two categories:

Direct Substitutes: Parts with identical electrical specifications (60V, 1.6A Ih, 3.2A It, 90 mOhms Ri, 220 mOhms R1) and compatible mechanical form factors.

Similar Substitutes: Parts with the same voltage and current ratings but variations in physical dimensions or lead spacing that may require PCB layout verification.

Parameter Comparison

Part Number	Manufacturer	Voltage - Max	Current - Hold (Ih)	Current - Trip (It)	Resistance - Initial (Ri)	Resistance - Post Trip (R1)	Operating Temperature	Lead Spacing	Product Status
PFRX.160.2	SCHURTER Inc.	60V	1.6 A	3.2 A	90 mOhms	220 mOhms	-40°C ~ 85°C	0.201" (5.10mm)	Obsolete
PTR060V0160-TR	Eaton - Electronics Division	60V	1.6 A	3.2 A	90 mOhms	220 mOhms	-40°C ~ 85°C	0.197" (5.00mm)	Active
PTR060V0160-TR1	Eaton - Electronics Division	60V	1.6 A	3.2 A	90 mOhms	220 mOhms	-40°C ~ 85°C	0.197" (5.00mm)	Active
PFRY.160	SCHURTER Inc.	72V	1.6 A	3.2 A	90 mOhms	220 mOhms	-40°C ~ 85°C	0.201" (5.10mm)	Active
RXEF160-2	Littelfuse Inc.	72V	1.6 A	3.2 A	90 mOhms	220 mOhms	-40°C ~ 85°C	0.200" (5.08mm)	Active
RXEF160K-2	Littelfuse	72V	1.6 A	3.2 A	90 mOhms	220 mOhms	-40°C ~ 85°C	0.199" (5.05mm)	Active
60R160XMR	Littelfuse Inc.	60V	1.6 A	3.2 A	90 mOhms	220 mOhms	-40°C ~ 85°C	0.201" (5.10mm)	Active
PTR060V0160-BK1	Eaton - Electronics Division	60V	1.6 A	3.2 A	90 mOhms	220 mOhms	-40°C ~ 85°C	0.197" (5.00mm)	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical and Mechanical Specifications):

PTR060V0160-TR and PTR060V0160-TR1 (Eaton) are active-status direct electrical equivalents with identical 60V, 1.6A Ih specifications. Lead spacing variance (0.197" vs. 0.201") is within typical PCB tolerance ranges. Both carry cURus and TUV approvals. PTR060V0160-BK1 offers the same electrical performance in bulk packaging.

60R160XMR (Littelfuse POLY-FUSE®) matches all electrical parameters and lead spacing (0.201") with active product status and cURus/TUV certifications.

For Voltage-Uprated Substitution (72V Rating):

PFRY.160 (SCHURTER Inc.) maintains identical electrical performance with elevated 72V maximum voltage rating and matching 0.201" lead spacing. This part is suitable where circuit voltage headroom is beneficial.

RXEF160-2 and RXEF160K-2 (Littelfuse PolySwitch®) provide 72V ratings with identical 1.6A Ih specifications and lead spacing within 0.199" to 0.200". Both carry expanded certifications (CQC, CSA, TUV, UL) and MSL rating of 1 (Unlimited).

Packaging Considerations:

PTR060V0160-TR and PTR060V0160-TR1 are supplied in Tape & Reel format. RXEF160-2 and RXEF160K-2 are supplied in Cut Tape. PFRY.160, 60R160XMR, and PTR060V0160-BK1 are supplied in Bulk packaging. Selection depends on assembly process requirements.

Frequently Asked Questions (FAQ)

Q: Can PFRY.160 replace PFRX.160.2 in a 60V circuit?

A: Yes. PFRY.160 has identical electrical specifications (1.6A Ih, 3.2A It, 90 mOhms Ri, 220 mOhms R1) and operates across -40°C to 85°C. The 72V maximum rating provides additional voltage margin without affecting circuit operation at 60V.

Q: What is the difference between PTR060V0160-TR and PTR060V0160-TR1?

A: Both are Eaton PTR060V series parts with identical electrical specifications and 60V ratings. The difference is packaging designation (TR vs. TR1), both supplied in Tape & Reel format. Electrical performance is equivalent.

Q: Are lead spacing variations between 0.197" and 0.201" significant?

A: Lead spacing differences of 0.004" (0.1mm) fall within standard PCB manufacturing tolerances. Parts with 0.197" spacing (Eaton PTR series) and 0.201" spacing (SCHURTER PFRX/PFRY, Littelfuse 60R series) are mechanically compatible with the same through-hole radial disc footprint.

Q: Why do some substitutes have 72V ratings instead of 60V?

A: PFRY.160, RXEF160-2, and RXEF160K-2 are rated for 72V maximum voltage while maintaining identical 1.6A hold current specifications. These parts are suitable for PFRX.160.2 applications and provide additional voltage safety margin in circuits operating at or below 60V.

Q: Which substitute has the highest inventory availability?

A: RXEF160K-2 (Littelfuse) has 5,479 pieces in stock. RXEF160-2 has 3,400 pieces. PTR060V0160-TR has 917 pieces. PFRY.160 has 1,779 pieces.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts carry RoHS3 compliance status. PFRX.160.2 is also RoHS3 compliant.

Q: What certifications should I verify for my application?

A: PFRX.160.2 carries CSA, TUV, and UR approvals. Direct substitutes PTR060V0160-TR, PTR060V0160-TR1, and PTR060V0160-BK1 carry cURus and TUV approvals. RXEF160-2 and RXEF160K-2 carry CQC, CSA, TUV, and UL approvals. Verify that substitute certifications meet your application requirements.

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