BP08KT DIP Switch SPST 8 Position Equivalent & Substitute Parts

Part Overview

The BP08KT is an 8-position DIP switch manufactured by C&K, featuring SPST (Single Pole Single Throw) circuit configuration with slide actuator design. Rated for 100mA at 5VDC, this component is classified as obsolete. Due to its discontinued status, equivalent substitute parts from active product lines are necessary for new designs and ongoing production requirements. Suitable alternatives maintain the core electrical specifications and mechanical form factor while offering improved availability and extended product lifecycle support.

Substiute Parts

BP08KT

C&KIn Stock: 1033BP08KT Datasheet

Current PartRFQ

BPA08B

C&KIn Stock: 10704BPA08B Datasheet

DirectRFQ

194-8MST

CTS ElectrocomponentsIn Stock: 6855194-8MST Datasheet

DirectRFQ

KAP1108ET

E-SwitchIn Stock: 1227KAP1108ET Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BP08KT is determined by the following critical parameters:

Primary Compatibility Criteria:

• SPST circuit configuration (mandatory)
• 8-position switch array (mandatory)
• Through hole, right angle mounting (mandatory)
• 0.100" (2.54mm) pitch (mandatory)
• PC pin termination (mandatory)

Secondary Compatibility Criteria:

• Current and voltage ratings must meet or exceed application requirements
• Operating temperature range must encompass the intended application environment
• Actuator type variation (slide vs. piano) is permissible when mechanical envelope constraints are satisfied
• Contact material and finish variations are acceptable provided electrical performance is maintained

The substitute parts listed below satisfy the primary compatibility criteria. Variations in secondary parameters reflect design evolution and material improvements across active product lines.

Parameter Comparison

Engineering Selection Recommendations

BPA08B (C&K) is the primary direct substitute. It maintains identical electrical specifications (100mA, 5VDC) and circuit configuration as the BP08KT while offering active product status and extended operating temperature range (-20°C ~ 85°C). The actuator type differs (piano vs. slide), resulting in a reduced height above board (7.30mm vs. 8.00mm). This part is suitable for applications where the original slide actuator can be replaced with a piano actuator and PCB clearance permits the lower profile. RoHS3 compliance provides enhanced regulatory alignment.

194-8MST (CTS Electrocomponents) is a direct substitute for applications operating at 24VDC. Current rating is reduced to 50mA, making this part suitable only for circuits requiring lower switching current. Extended operating temperature range (-40°C ~ 85°C) and superior electrical life (7,000 cycles) support demanding industrial environments. Piano actuator and plastic body material represent design variations from the original specification.

KAP1108ET (E-Switch) is a similar substitute for 24VDC applications with current requirements not exceeding 25mA. This part offers the highest operating temperature range (-40°C ~ 85°C) and maintains mechanical life equivalent to the original (2,000 cycles). The increased height above board (10.20mm) requires PCB layout verification. This option is appropriate for space-constrained applications where the original 5VDC specification can be adapted to 24VDC operation.

All substitute parts maintain RoHS3 compliance, MSL Level 1 rating, and PC pin termination compatible with standard through-hole assembly processes.

Frequently Asked Questions (FAQ)

Q: Can BPA08B directly replace BP08KT without PCB modification?

A: BPA08B maintains electrical compatibility (100mA, 5VDC, SPST, 8-position) and identical pitch (0.100"). The primary difference is actuator type (piano vs. slide) and reduced height above board (7.30mm vs. 8.00mm). PCB layout verification is required to confirm mechanical clearance. No circuit modification is necessary.

Q: What are the voltage and current limitations when using 194-8MST or KAP1108ET?

A: Both parts operate at 24VDC, requiring circuit redesign if the original 5VDC specification is mandatory. Current ratings are 50mA (194-8MST) and 25mA (KAP1108ET), compared to the original 100mA. These parts are suitable only for applications where the reduced current capacity meets load requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. BP08KT is RoHS Compliant. All substitute parts (BPA08B, 194-8MST, KAP1108ET) are ROHS3 Compliant, meeting current regulatory requirements with enhanced material restrictions.

Q: How do actuator type differences affect component selection?

A: BP08KT features a slide (standard) actuator. All substitutes use piano actuators. Piano actuators provide tactile feedback and are commonly used in DIP switch applications. Mechanical envelope and user interface requirements should guide actuator selection. Height above board varies: BPA08B (7.30mm), 194-8MST (7.90mm), KAP1108ET (10.20mm).

Q: What is the impact of different mechanical and electrical life ratings?

A: BP08KT and KAP1108ET both specify 2,000 mechanical and electrical cycles. BPA08B specifies 1,000 cycles for both parameters. 194-8MST specifies 7,000 electrical cycles with mechanical life not specified. Application duty cycle and expected component lifespan should determine which part is appropriate.

Q: Are packaging differences significant for procurement?

A: BP08KT packaging is listed as "-" (not specified). BPA08B, 194-8MST, and KAP1108ET are supplied in tube packaging. Tube packaging is standard for DIP switches and compatible with automated assembly processes. No functional impact results from packaging format.