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PFRX.110 Polymeric PTC Resettable Fuse Equivalent & Substitute Parts
Part Overview
The PFRX.110 is a polymeric PTC resettable fuse manufactured by SCHURTER Inc., rated for 60V maximum voltage with 1.1A hold current. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. The PFRX.110 series provides circuit protection through automatic current limiting in the 60V operating range with radial disc packaging suitable for through-hole PCB mounting.
Substiute Parts
Key Parameters
| Parameter | PFRX.110 Specification |
|---|---|
| Voltage - Maximum | 60V |
| Current - Hold (Ih) | 1.1A |
| Current - Trip (It) | 2.2A |
| Resistance - Initial (Ri) | 150 mOhms (Min) |
| Resistance - Post Trip (R1) | 380 mOhms (Max) |
| Operating Temperature Range | -40°C to 85°C |
| Mounting Type | Through Hole |
| Package / Case | Radial, Disc |
| Lead Spacing | 0.201" (5.10mm) |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution of the PFRX.110 is determined by strict electrical and mechanical parameter matching. The primary substitution criteria are:
Critical Parameters for Direct Substitution:
- Voltage rating must equal or exceed 60V maximum
- Current hold (Ih) must equal 1.1A
- Current trip (It) must equal 2.2A
- Resistance characteristics (Ri and R1) must fall within specified ranges
- Operating temperature range must encompass -40°C to 85°C
- Mounting type must be through-hole radial disc configuration
- Lead spacing must be compatible with 0.201" (5.10mm) spacing
Substitution Categories:
Direct Equivalent: Parts with identical electrical specifications and compatible mechanical dimensions from alternative manufacturers.
Similar Specification: Parts with matching voltage and current ratings but from different manufacturers, suitable where mechanical dimensions allow PCB layout accommodation.
Parametric Equivalent: Parts meeting all electrical specifications with AEC-Q200 automotive-grade certification, providing enhanced reliability for demanding applications.
Parameter Comparison
| Part Number | Manufacturer | Voltage (Max) | Ih (A) | It (A) | Ri (mOhms) | R1 (mOhms) | Lead Spacing | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| PFRX.110 | SCHURTER Inc. | 60V | 1.1 | 2.2 | 150 (Min) | 380 (Max) | 0.201" (5.10mm) | Obsolete | ROHS3 |
| PFRY.110 | SCHURTER Inc. | 72V | 1.1 | 2.2 | 150 (Min) | 380 (Max) | 0.201" (5.10mm) | Active | ROHS3 |
| 60R110XMR | Littelfuse Inc. | 60V | 1.1 | 2.2 | 150 (Min) | 380 (Max) | 0.201" (5.10mm) | Active | ROHS3 |
| PTR060V0110-BK1 | Eaton - Electronics Division | 60V | 1.1 | 2.2 | 150 (Min) | 380 (Max) | 0.197" (5.00mm) | Active | ROHS3 |
| PTR060V0110-TR1 | Eaton - Electronics Division | 60V | 1.1 | 2.2 | 150 (Min) | 380 (Max) | 0.197" (5.00mm) | Active | ROHS3 |
| 0ZRR0110FF1A | Bel Fuse Inc. | 60V | 1.1 | 2.2 | 150 (Min) | 380 (Max) | 0.201" (5.10mm) | Active | ROHS3 |
| 60R135XMR | Littelfuse Inc. | 60V | 1.35 | 2.7 | 120 (Min) | 300 (Max) | 0.201" (5.10mm) | Active | ROHS3 |
| 60R185XMR | Littelfuse Inc. | 60V | 1.85 | 3.7 | 80 (Min) | 190 (Max) | 0.201" (5.10mm) | Active | ROHS3 |
| 60R300XF | Littelfuse Inc. | 60V | 3.0 | 6.0 | 40 (Min) | 100 (Max) | 0.402" (10.20mm) | Active | ROHS3 |
| 60R375XH | Littelfuse Inc. | 60V | 3.75 | 7.5 | 30 (Min) | 80 (Max) | 0.402" (10.20mm) | Active | ROHS3 |
Engineering Selection Recommendations
Primary Substitutes (Identical Electrical Specifications):
The 60R110XMR from Littelfuse Inc. and 0ZRR0110FF1A from Bel Fuse Inc. provide direct electrical equivalence to the PFRX.110. Both maintain 60V maximum voltage, 1.1A hold current, and 2.2A trip current with matching resistance characteristics. The 0ZRR0110FF1A includes AEC-Q200 automotive-grade certification, suitable for applications requiring enhanced reliability qualification. Both parts are active products with ROHS3 compliance.
Alternative from Same Manufacturer:
The PFRY.110 from SCHURTER Inc. offers a higher voltage rating of 72V while maintaining identical current and resistance specifications. This part is active and ROHS3 compliant, providing a direct upgrade path for applications where higher voltage margin is beneficial.
Eaton Electronics Options:
The PTR060V0110-BK1 and PTR060V0110-TR1 from Eaton - Electronics Division match all electrical specifications with minor lead spacing variation (0.197" versus 0.201"). These parts are active and ROHS3 compliant, with packaging options in bulk and tape & reel formats.
Higher Current Alternatives:
The 60R135XMR, 60R185XMR, 60R300XF, and 60R375XH from Littelfuse provide higher current ratings (1.35A through 3.75A) while maintaining 60V voltage rating. These parts are suitable only where circuit design permits higher current thresholds and mechanical space accommodates larger disc diameters.
Frequently Asked Questions (FAQ)
Q: Can I use PFRY.110 as a direct replacement for PFRX.110?
A: The PFRY.110 provides electrical equivalence with identical current and resistance specifications. The 72V rating exceeds the 60V requirement, making it suitable for applications where higher voltage margin is acceptable. Verify PCB layout compatibility due to minor dimensional differences before implementation.
Q: What is the difference between 60R110XMR and 0ZRR0110FF1A?
A: Both parts provide identical electrical specifications matching the PFRX.110. The 0ZRR0110FF1A includes AEC-Q200 automotive-grade certification, making it appropriate for automotive and high-reliability applications. The 60R110XMR is suitable for general industrial applications.
Q: Are the Eaton PTR060V parts compatible with existing PFRX.110 PCB layouts?
A: The Eaton parts maintain matching electrical specifications and similar mechanical dimensions. Lead spacing is 0.197" (5.00mm) compared to the PFRX.110 standard of 0.201" (5.10mm). Verify PCB hole spacing before substitution to ensure proper fit.
Q: Can I use higher current-rated parts like 60R135XMR or 60R300XF?
A: Higher current-rated parts operate at different trip thresholds and resistance values. Use these only if circuit design specifically requires higher current protection levels. Substitution changes circuit protection characteristics and must be validated through circuit analysis.
Q: What packaging options are available for active substitutes?
A: The 60R110XMR is available in Cut Tape (CT) packaging. The PTR060V0110-BK1 is available in Bulk, while PTR060V0110-TR1 is available in Tape & Reel (TR) format. The 0ZRR0110FF1A is available in Bulk packaging. Select packaging based on procurement and assembly requirements.
Q: Are all substitute parts ROHS3 compliant?
A: All listed substitute parts maintain ROHS3 compliance, matching the environmental standards of the original PFRX.110 component.
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