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MINISMDC100F-2 Polymeric PTC Resettable Fuse Equivalent & Substitute Parts
Part Overview
The MINISMDC100F-2 is a polymeric PTC resettable fuse manufactured by Littelfuse Inc. in the PolySwitch® miniSMD series. This 8V, 1.1A hold current device is designed for surface mount applications in the 1812 (4532 Metric) package format with concave geometry. The part is active in production status and widely used in circuit protection applications requiring automatic reset capability after fault conditions clear.
Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to component availability, supply chain considerations, or design flexibility within specified parameter tolerances.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Max | 8 | V |
| Current - Hold (Ih) (Max) | 1.1 | A |
| Current - Trip (It) | 2.2 | A |
| Resistance - Initial (Ri) (Min) | 40 | mOhms |
| Resistance - Post Trip (R1) (Max) | 210 | mOhms |
| Operating Temperature Range | -40 to 85 | °C |
| Package / Case | 1812 (4532 Metric), Concave | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
Substitute Part Grouping Explanation
Substitution logic for the MINISMDC100F-2 is based on the following critical parameters:
- Voltage rating must equal or exceed 8V maximum
- Current hold (Ih) must match 1.1A specification
- Current trip (It) must match 2.2A specification
- Resistance characteristics (Ri and R1) must fall within specified ranges
- Operating temperature range must cover -40°C to 85°C minimum
- Package must be 1812 (4532 Metric) format to ensure PCB footprint compatibility
- Surface mount mounting type is required
- RoHS3 compliance is mandatory
Substitute parts are grouped into two categories: manufacturer-recommended alternatives from Littelfuse Inc. and parametric equivalents from alternative manufacturers meeting identical electrical specifications.
Parameter Comparison
| Part Number | Manufacturer | Voltage (V) | Ih (A) | It (A) | Ri (mOhms) | R1 (mOhms) | Package | Series |
|---|---|---|---|---|---|---|---|---|
| MINISMDC100F-2 | Littelfuse Inc. | 8 | 1.1 | 2.2 | 40 | 210 | 1812 (4532 Metric) | PolySwitch® miniSMD |
| MINISMDC110F-2 | Littelfuse Inc. | 8 | 1.1 | 2.2 | 40 | 210 | 1812 (4532 Metric) | PolySwitch® miniSMD |
| 0ZCG0110FF2C | Bel Fuse Inc. | 8 | 1.1 | 2.2 | 40 | 210 | 1812 (4532 Metric) | 0ZCG |
| 1206L110THYR | Littelfuse Inc. | 8 | 1.1 | 2.2 | 40 | 210 | 1206 (3216 Metric) | POLY-FUSE® 1206L |
| 1210L110THYR | Littelfuse Inc. | 8 | 1.1 | 2.2 | 60 | 210 | 1210 (3225 Metric) | POLY-FUSE® 1210L |
| 1812L150ZR | Littelfuse Inc. | 8 | 1.25 | 3.0 | 40 | 110 | 1812 (4532 Metric) | POLY-FUSE® 1812L |
| 1812L160PR | Littelfuse Inc. | 8 | 1.6 | 2.8 | 30 | 100 | 1812 (4532 Metric) | POLY-FUSE® 1812L |
| 1812L200THPR | Littelfuse Inc. | 8 | 2.0 | 4.6 | 20 | 70 | 1812 (4532 Metric) | POLY-FUSE® 1812L |
| 1812L260THDR | Littelfuse Inc. | 8 | 2.6 | 5.2 | 15 | 47 | 1812 (4532 Metric) | POLY-FUSE® 1812L |
| 1206L075THYR | Littelfuse Inc. | 8 | 0.75 | 1.5 | 90 | 290 | 1206 (3216 Metric) | POLY-FUSE® 1206L |
| 1206L150THWR | Littelfuse Inc. | 8 | 1.5 | 3.0 | 40 | 120 | 1206 (3216 Metric) | POLY-FUSE® 1206L |
Engineering Selection Recommendations
Direct Electrical Equivalents (Same Package)
MINISMDC110F-2 and 0ZCG0110FF2C are direct parametric equivalents to MINISMDC100F-2, matching all electrical specifications and the 1812 (4532 Metric) package format. Both parts maintain identical voltage, hold current, trip current, and resistance characteristics. MINISMDC110F-2 is the same series variant from Littelfuse Inc. with CSA, TUV, and UL approvals. 0ZCG0110FF2C from Bel Fuse Inc. carries AEC-Q200 automotive qualification in addition to cURus and TUV approvals, suitable for applications requiring automotive-grade reliability.
Same-Voltage Alternatives with Different Current Ratings (1812 Package)
Parts 1812L150ZR, 1812L160PR, 1812L200THPR, and 1812L260THDR maintain the 1812 (4532 Metric) package and 8V voltage rating but feature higher hold current ratings. These are suitable only when circuit design permits higher current thresholds. All carry cURus and TUV approvals with ROHS3 compliance.
Same-Voltage Alternatives with Different Packages
1206L110THYR and 1210L110THYR match the electrical specifications (8V, 1.1A hold current, 2.2A trip current) but use smaller package formats (1206 and 1210 respectively). These require PCB footprint redesign and are suitable only when space constraints override package compatibility requirements.
Lower Current Rating Alternative
1206L075THYR provides 8V protection with 0.75A hold current in a 1206 package. This part is suitable only for applications with lower current requirements and requires both package and electrical redesign.
Frequently Asked Questions (FAQ)
Q: Can I substitute MINISMDC110F-2 for MINISMDC100F-2 without circuit modification?
A: Yes. MINISMDC110F-2 is a parametric equivalent within the same PolySwitch® miniSMD series, matching all electrical specifications and the 1812 (4532 Metric) package footprint. No circuit modification is required.
Q: What is the difference between MINISMDC100F-2 and 0ZCG0110FF2C?
A: Both parts are parametric equivalents with identical electrical specifications and 1812 package format. The primary difference is manufacturer (Littelfuse vs. Bel Fuse) and certifications. 0ZCG0110FF2C includes AEC-Q200 automotive qualification, making it suitable for automotive applications where this certification is required.
Q: Can I use 1206L110THYR as a substitute for MINISMDC100F-2?
A: 1206L110THYR matches the electrical specifications (8V, 1.1A hold current) but uses a smaller 1206 (3216 Metric) package instead of 1812 (4532 Metric). Substitution requires PCB footprint redesign and is not a direct drop-in replacement.
Q: Why would I choose 1812L150ZR or 1812L160PR over MINISMDC100F-2?
A: These parts maintain the 1812 package and 8V rating but feature higher hold current ratings (1.25A and 1.6A respectively). Selection depends on circuit requirements. If your application requires protection at higher current thresholds, these alternatives provide appropriate trip points while maintaining the same package footprint.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts carry ROHS3 compliance certification, meeting environmental and material restriction requirements.
Q: What certifications should I verify for my specific application?
A: MINISMDC100F-2 carries CSA, TUV, and UL approvals. MINISMDC110F-2 and 0ZCG0110FF2C carry cURus and TUV approvals. 0ZCG0110FF2C additionally carries AEC-Q200 certification for automotive applications. Verify that substitute part certifications align with your application requirements.
Q: Can I use parts with different resistance characteristics?
A: Resistance characteristics (Ri and R1) directly affect circuit behavior during normal operation and fault conditions. Substitution with different resistance values may alter circuit performance. Use only parts with matching or tighter resistance specifications unless circuit analysis confirms compatibility.
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