Equivalent & Substitute Parts: BK1/HTC-70M

Part Overview

The BK1/HTC-70M is a cartridge fuse holder manufactured by Eaton - Electronics Division, designed for 10 A, 250V applications with panel mount configuration. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing procurement and system maintenance. The holder accommodates 5mm x 20mm cartridge fuses with horizontal orientation and solder lug termination.

Substiute Parts

BK1/HTC-70M

Eaton - Electronics DivisionIn Stock: 1135BK1/HTC-70M Datasheet

Current PartRFQ

BK/HTB-32M-R

Eaton - Electronics DivisionIn Stock: 3321BK/HTB-32M-R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK1/HTC-70M is determined by the following critical parameters that must remain constant or compatible:

Fixed Parameters (Must Match):

• Fuse size: 5mm x 20mm cartridge format
• Voltage rating: 250V
• Mounting type: Panel mount
• Number of circuits: 1 circuit
• Fuse type: Cartridge

Variable Parameters (Allowable Differences):

• Current rating: The substitute part BK/HTB-32M-R operates at 16 A, which is higher than the original 10 A rating. This represents an uprated substitute suitable for applications requiring higher current capacity within the same voltage and form factor constraints.
• Termination style: The substitute transitions from solder lug to quick connect (0.187" / 4.7mm), requiring circuit board or connector redesign.
• Product status and compliance: The substitute is active and RoHS3 compliant, addressing obsolescence and regulatory requirements.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Electrical Function): The BK/HTB-32M-R serves as the primary substitute for the obsolete BK1/HTC-70M. Both components maintain identical fuse size (5mm x 20mm), voltage rating (250V), mounting configuration (panel mount), and circuit count (1 circuit). The substitute is manufactured by the same supplier (Eaton - Electronics Division) and is currently in active production status.

Current Rating Consideration: The BK/HTB-32M-R is rated for 16 A compared to the original 10 A. This uprating is acceptable for applications where the circuit design permits higher current capacity. The substitute will not degrade performance in circuits originally designed for 10 A operation.

Compliance and Regulatory Status: The substitute achieves RoHS3 compliance, addressing environmental and regulatory requirements that the obsolete original part does not meet. The substitute is REACH unaffected, confirming compliance with chemical substance restrictions.

Termination Modification Requirement: The critical difference is termination style. The original BK1/HTC-70M uses solder lug termination, while the BK/HTB-32M-R uses quick connect (0.187" / 4.7mm) termination. Circuit board or connector redesign is required to accommodate this change. This is not an electrical incompatibility but a mechanical interface change.

Frequently Asked Questions (FAQ)

Q: Can the BK/HTB-32M-R directly replace the BK1/HTC-70M without any modifications?

A: Electrical and mechanical form factors are compatible. However, the termination style differs: the original uses solder lug termination while the substitute uses quick connect (0.187" / 4.7mm) termination. Circuit board or connector interface modification is required.

Q: Is the higher current rating (16 A vs. 10 A) of the substitute a problem?

A: No. The substitute's 16 A rating is an uprating that does not create incompatibility. Circuits designed for 10 A operation will function correctly with a 16 A rated holder. The fuse element inserted into the holder determines actual circuit protection, not the holder rating.

Q: What is the significance of the RoHS3 compliance difference?

A: The substitute meets current environmental and regulatory standards (RoHS3 compliant), while the original is RoHS non-compliant. For new designs or systems requiring regulatory compliance, the substitute is the appropriate choice.

Q: Are both parts suitable for the same voltage and fuse size applications?

A: Yes. Both the BK1/HTC-70M and BK/HTB-32M-R are rated for 250V operation and accommodate 5mm x 20mm cartridge fuses. Voltage and fuse size compatibility is confirmed.

Q: What packaging is available for the substitute part?

A: The BK/HTB-32M-R is supplied in bulk packaging with 3239 pieces currently in stock.

Q: Does the substitute maintain the same moisture sensitivity level?

A: Yes. Both parts carry MSL rating 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.