MF-RHT450-2 Equivalent & Substitute Parts

Part Overview

The MF-RHT450-2 is a polymeric PTC resettable fuse manufactured by Bourns Inc. under the Multifuse® series. This through-hole radial disc component is rated for 16V maximum voltage with a 4.5A hold current and is designed for overcurrent protection in electronic circuits. The part is currently in active production status with 2360 units available in new original inventory. Substitute parts are identified when equivalent electrical and mechanical parameters align within the allowed tolerances for this product category, enabling component interchangeability in circuit designs.

Substiute Parts

MF-RHT450-2

Bourns Inc.In Stock: 2465MF-RHT450-2 Datasheet

Current PartRFQ

RGEF600-1

LittelfuseIn Stock: 1630RGEF600-1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for polymeric PTC resettable fuses is determined by the following critical parameters:

• Voltage Rating: Maximum voltage must be equal to or greater than the original part (16V minimum)
• Mounting Configuration: Must be through-hole radial disc to ensure mechanical compatibility
• Package Type: Radial lead spacing and disc form factor must accommodate existing PCB layouts
• Electrical Characteristics: Hold current (Ih), trip current (It), and resistance values must fall within acceptable operating ranges for the circuit application
• Environmental Compliance: RoHS3 compliance and operating temperature range must meet application requirements

The RGEF600-1 qualifies as a substitute based on matching voltage rating (16V), identical mounting type (through-hole radial disc), equivalent package configuration, and RoHS3 compliance status.

Parameter Comparison

Engineering Selection Recommendations

Both the MF-RHT450-2 and RGEF600-1 are active production components with ROHS3 compliance. Selection between these parts depends on circuit-specific requirements:

The MF-RHT450-2 provides a lower hold current (4.5A) and lower trip current (7.8A) with higher initial resistance (22 mOhms minimum) and extended operating temperature range (-40°C to 125°C). This configuration is suitable for applications requiring tighter current thresholds and broader thermal operation.

The RGEF600-1 offers higher hold current (6A) and trip current (10.2A) with lower initial resistance (10 mOhms minimum) and a narrower operating temperature range (-40°C to 85°C). This configuration is appropriate for applications with higher current requirements and standard thermal environments.

Both parts carry equivalent voltage ratings (16V), identical mounting types (through-hole radial), and matching package configurations, ensuring mechanical interchangeability on PCB layouts designed for radial disc fuses.

Frequently Asked Questions (FAQ)

Q: Can the RGEF600-1 directly replace the MF-RHT450-2 in any circuit?

A: Direct substitution requires circuit analysis. While both parts share identical voltage ratings (16V), mounting types (through-hole radial), and package configurations, the RGEF600-1 has higher hold and trip currents (6A and 10.2A respectively versus 4.5A and 7.8A). Substitution is valid only when the circuit can tolerate these higher current thresholds without compromising protection objectives.

Q: What are the key differences in electrical performance?

A: The MF-RHT450-2 has lower initial resistance (22 mOhms minimum) compared to the RGEF600-1 (10 mOhms minimum). The MF-RHT450-2 also provides a wider operating temperature range (-40°C to 125°C versus -40°C to 85°C). Trip time differs slightly (3 seconds versus 3.3 seconds).

Q: Are both parts mechanically compatible with existing PCB designs?

A: Yes. Both components are through-hole radial disc packages. However, lead spacing differs: MF-RHT450-2 has 0.114" (2.90mm) spacing while RGEF600-1 has 0.199" (5.05mm) spacing. PCB hole patterns must accommodate the specific lead spacing of the selected part.

Q: Do both parts meet the same compliance standards?

A: Both parts are ROHS3 compliant and carry active product status. The RGEF600-1 holds additional approvals (CSA, TUV, UL) while the MF-RHT450-2 carries AEC-Q200 automotive qualification. Application requirements determine which certifications are necessary.

Q: What is the inventory status for each part?

A: The MF-RHT450-2 has 2360 units in new original stock. The RGEF600-1 has 1612 units in new original stock.