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SMD260-2 Equivalent & Substitute Parts
Part Overview
The SMD260-2 is a Polymeric PTC Resettable Fuse manufactured by Littelfuse Inc., rated for 6V maximum voltage with a 2.6A hold current. This component is designed for overcurrent protection in surface mount applications using the 2920 (7351 Metric) package format. The SMD260-2 is currently listed as obsolete, making identification of active equivalent parts essential for ongoing production and design requirements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Voltage - Max | 6V |
| Current - Hold (Ih) (Max) | 2.6 A |
| Current - Trip (It) | 5.2 A |
| Current - Max | 40 A |
| Time to Trip | 20 s |
| Resistance - Initial (Ri) (Min) | 25 mOhms |
| Resistance - Post Trip (R1) (Max) | 75 mOhms |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
| Package / Case | 2920 (7351 Metric) |
| Size / Dimension | 0.290" L x 0.202" W (7.36mm x 5.12mm) |
| Thickness (Max) | 0.118" (3.00mm) |
| Approval Agency | CSA, TUV, UL |
| Moisture Sensitivity Level (MSL) | 2A (4 Weeks) |
Substitute Part Grouping Explanation
Substitution of the SMD260-2 is determined by electrical and mechanical parameter equivalence within the Littelfuse PolySwitch® SMD series. The primary substitution criteria are:
- Voltage rating: 6V maximum
- Hold current (Ih): 2.6A
- Trip current (It): 5.2A
- Maximum current: 40A
- Time to trip: 20 seconds
- Initial resistance: 25 mOhms minimum
- Post-trip resistance: 75 mOhms maximum
- Operating temperature range: -40°C to 85°C
- Surface mount configuration with compatible package dimensions
The SMD260F-2 meets all electrical specifications and dimensional requirements, with the primary difference being packaging format and product status.
Parameter Comparison
| Parameter | SMD260-2 | SMD260F-2 |
|---|---|---|
| Manufacturer | Littelfuse Inc. | Littelfuse Inc. |
| Series | PolySwitch®, SMD | PolySwitch®, SMD |
| Type | Polymeric | Polymeric |
| Voltage - Max | 6V | 6V |
| Current - Hold (Ih) (Max) | 2.6 A | 2.6 A |
| Current - Trip (It) | 5.2 A | 5.2 A |
| Current - Max | 40 A | 40 A |
| Time to Trip | 20 s | 20 s |
| Resistance - Initial (Ri) (Min) | 25 mOhms | 25 mOhms |
| Resistance - Post Trip (R1) (Max) | 75 mOhms | 75 mOhms |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Size / Dimension | 0.290" L x 0.202" W (7.36mm x 5.12mm) | 0.290" L x 0.202" W (7.36mm x 5.12mm) |
| Thickness (Max) | 0.118" (3.00mm) | 0.118" (3.00mm) |
| Approval Agency | CSA, TUV, UL | CSA, TUV, UL |
| Moisture Sensitivity Level (MSL) | 2A (4 Weeks) | 2A (4 Weeks) |
| Product Status | Obsolete | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
Engineering Selection Recommendations
The SMD260F-2 is the direct electrical equivalent to the SMD260-2, with identical electrical performance and mechanical dimensions. The SMD260F-2 is currently in active production status, whereas the SMD260-2 is obsolete. The SMD260F-2 carries ROHS3 compliance, meeting current regulatory requirements for new designs and production runs. Both components are certified by CSA, TUV, and UL. The packaging difference (2-SMD versus standard SMD) does not affect electrical or thermal performance. Selection of the SMD260F-2 is appropriate for applications requiring current production availability and regulatory compliance.
Frequently Asked Questions (FAQ)
Q: Can SMD260F-2 be used as a direct replacement for SMD260-2?
A: Yes. The SMD260F-2 provides identical electrical specifications, including voltage rating, hold current, trip current, resistance characteristics, and operating temperature range. Physical dimensions are equivalent, allowing direct PCB placement without modification.
Q: What is the difference between the SMD260-2 and SMD260F-2 packaging?
A: The SMD260-2 uses standard SMD packaging, while the SMD260F-2 is supplied in Tape & Reel (TR) format. Both maintain the same 2920 (7351 Metric) case dimensions and are compatible with standard surface mount assembly equipment.
Q: Why is the SMD260-2 listed as obsolete?
A: The SMD260-2 has been superseded by the SMD260F-2 in Littelfuse's product portfolio. The SMD260F-2 offers the same electrical performance with improved regulatory compliance (ROHS3).
Q: Are there any compliance differences between these parts?
A: The SMD260-2 is RoHS non-compliant, while the SMD260F-2 is ROHS3 compliant. Both carry CSA, TUV, and UL certifications. New designs should specify the SMD260F-2 to meet current environmental and regulatory standards.
Q: What is the moisture sensitivity level for these components?
A: Both the SMD260-2 and SMD260F-2 have a Moisture Sensitivity Level (MSL) of 2A with a 4-week floor life. Standard moisture control procedures during storage and assembly are required.
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