MF-RHT650-2 Equivalent & Substitute Parts

Part Overview

The MF-RHT650-2 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 6.5A hold current and 12A trip current. The part is active in production status with AEC-Q200 ratings and ROHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter ranges for this product category.

Substiute Parts

MF-RHT650-2

Bourns Inc.In Stock: 777MF-RHT650-2 Datasheet

Current PartRFQ

RGEF900-1

LittelfuseIn Stock: 841RGEF900-1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MF-RHT650-2 is determined by the following critical parameters:

• Voltage rating must equal or exceed 16V maximum
• Mounting type must be Through Hole with Radial, Disc package configuration
• Component type must be Polymeric PTC resettable fuse
• Current hold (Ih) and trip (It) characteristics must fall within acceptable operating ranges for the circuit application
• Operating temperature range must support the intended deployment environment
• RoHS and regulatory compliance status must meet or exceed the original specification

The RGEF900-1 manufactured by Littelfuse meets these substitution criteria with equivalent voltage rating (16V), identical mounting configuration (Through Hole Radial Disc), and polymeric PTC technology. Both components share the same time-to-trip specification (5.5 s) and maximum current rating (100 A).

Parameter Comparison

Engineering Selection Recommendations

Both the MF-RHT650-2 and RGEF900-1 maintain active product status with current manufacturing availability. The MF-RHT650-2 carries AEC-Q200 automotive qualification ratings. The RGEF900-1 holds CSA, TUV, and UL approvals. Selection between these components depends on circuit requirements for hold current and trip current thresholds. The MF-RHT650-2 provides lower hold current (6.5A) and trip current (12A) with extended operating temperature range to 125°C. The RGEF900-1 provides higher hold current (9A) and trip current (15.3A) with operating temperature range to 85°C. Both components satisfy ROHS3 compliance and share identical voltage rating, maximum current capacity, and time-to-trip characteristics. Lead spacing differs between the two designs: MF-RHT650-2 at 0.114" (2.90mm) versus RGEF900-1 at 0.199" (5.05mm), requiring PCB layout verification during substitution.

Frequently Asked Questions (FAQ)

Q: Can the RGEF900-1 directly replace the MF-RHT650-2 in all applications?

A: Direct replacement requires verification of three factors: (1) circuit hold current and trip current requirements must be compatible with RGEF900-1 specifications (9A hold, 15.3A trip versus 6.5A hold, 12A trip); (2) PCB layout must accommodate the different lead spacing (5.05mm versus 2.90mm); (3) operating temperature environment must not exceed 85°C for the RGEF900-1.

Q: What are the key electrical differences between these two parts?

A: The RGEF900-1 has higher hold and trip current ratings (9A and 15.3A respectively) compared to the MF-RHT650-2 (6.5A and 12A). Initial resistance is lower in the RGEF900-1 (4.7 mOhms minimum versus 11 mOhms), and post-trip resistance is also lower (14.6 mOhms maximum versus 26 mOhms). The MF-RHT650-2 supports higher operating temperatures up to 125°C.

Q: Are both parts compliant with current regulatory standards?

A: Both components are ROHS3 compliant. The MF-RHT650-2 carries AEC-Q200 automotive qualification. The RGEF900-1 holds CSA, TUV, and UL certifications. Selection should align with specific application regulatory requirements.

Q: What packaging differences exist between these substitutes?

A: The MF-RHT650-2 is supplied in Cut Tape (CT) packaging. The RGEF900-1 is supplied in Bag packaging. Both use identical Radial Disc through-hole package configuration with different lead spacing dimensions.