BP08KE DIP Switch SPST 8-Position Equivalent & Substitute Parts

Part Overview

The BP08KE is an 8-position DIP switch manufactured by C&K, featuring SPST (Single Pole Single Throw) circuit configuration with 100mA at 5VDC rating. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The BP08KE employs a slide actuator with raised level, phosphor bronze contacts finished in gold, and is rated for 2,000 mechanical and electrical cycles. Its through-hole, right-angle mounting configuration with 0.100" pitch makes it suitable for standard PCB applications requiring DIP switch functionality in legacy designs.

Key Parameters

Parameter	Value
Manufacturer Part Number	BP08KE
Manufacturer	C&K
Circuit Configuration	SPST
Number of Positions	8
Current Rating	100mA
Voltage Rating	5VDC
Actuator Type	Slide (Standard)
Mounting Type	Through Hole, Right Angle
Pitch	0.100" (2.54mm)
Product Status	Obsolete
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the BP08KE is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Circuit configuration: SPST
Number of positions: 8
Mounting type: Through hole, right angle
Pitch: 0.100" (2.54mm)
Termination style: PC pin

Electrical Compatibility Parameters:

Current rating: Must equal or exceed 100mA
Voltage rating: Must equal or exceed 5VDC

Mechanical Compatibility Parameters:

Actuator level: Raised
Contact finish: Gold

Two substitute parts meet the mandatory compatibility criteria with varying electrical ratings and actuator types:

BPA08B (C&K) – Direct manufacturer substitute with identical electrical specifications (100mA, 5VDC) but piano actuator configuration instead of slide actuator.
KAP1108E (E-Switch) – Cross-manufacturer substitute with different electrical specifications (25mA, 24VDC) and piano actuator configuration. This part meets mechanical compatibility but operates at reduced current capacity and elevated voltage.

Parameter Comparison

Parameter	BP08KE (Main)	BPA08B (Direct)	KAP1108E (Similar)
Manufacturer	C&K	C&K	E-Switch
Circuit	SPST	SPST	SPST
Positions	8	8	8
Current Rating	100mA	100mA	25mA
Voltage Rating	5VDC	5VDC	24VDC
Actuator Type	Slide (Standard)	Piano	Piano
Height Above Board	0.315" (8.00mm)	0.287" (7.30mm)	0.402" (10.20mm)
Contact Material	Phosphor Bronze	Beryllium Copper	Phosphor Bronze
Contact Finish	Gold	Gold	Gold
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Pitch	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Mechanical Life	2,000 Cycles	1,000 Cycles	2,000 Cycles
Electrical Life	2,000 Cycles	1,000 Cycles	2,000 Cycles
Operating Temperature	-20°C ~ 60°C	-20°C ~ 85°C	-40°C ~ 85°C
Product Status	Obsolete	Active	Active
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

BPA08B Selection Criteria: BPA08B is the primary substitute for BP08KE applications. Both parts are manufactured by C&K and share identical electrical specifications (100mA, 5VDC). The BPA08B is currently in active production status, ensuring supply chain continuity. The primary difference is actuator type: BPA08B uses a piano actuator versus the slide actuator on BP08KE. BPA08B is washable and complies with ROHS3 standards. The reduced mechanical and electrical life rating (1,000 cycles versus 2,000 cycles) must be evaluated against application duty cycle requirements. The lower profile (0.287" versus 0.315") may provide PCB layout advantages in space-constrained designs.

KAP1108E Selection Criteria: KAP1108E is a cross-manufacturer alternative from E-Switch suitable only for applications where the reduced current rating (25mA versus 100mA) and elevated voltage requirement (24VDC versus 5VDC) are compatible with circuit design. This part offers extended operating temperature range (-40°C to 85°C) and maintains 2,000-cycle mechanical and electrical life ratings. KAP1108E is not washable. Selection of this part requires confirmation that the application circuit operates at 24VDC and does not exceed 25mA per switch position.

Frequently Asked Questions (FAQ)

Q: Can BPA08B directly replace BP08KE without PCB modification? A: BPA08B maintains identical pitch (0.100"), mounting type (through hole, right angle), and electrical specifications (100mA, 5VDC). The primary difference is actuator type (piano versus slide). PCB footprint compatibility depends on actuator profile tolerance and available board space. Height above board differs by 0.028" (0.72mm), which may affect clearance in confined applications. Mechanical and electrical life cycles are reduced to 1,000 cycles.

Q: What are the electrical differences between BPA08B and KAP1108E? A: BPA08B matches BP08KE electrical specifications exactly (100mA, 5VDC). KAP1108E operates at 25mA and 24VDC, representing a significant reduction in current capacity and a voltage increase. KAP1108E is suitable only for 24VDC circuits with per-position current requirements not exceeding 25mA.

Q: Does actuator type affect circuit functionality? A: Both slide and piano actuators provide SPST switching function. The actuator type affects user interface (slide versus push-button operation) and mechanical feel. From a circuit perspective, both deliver identical electrical performance when properly actuated.

Q: Are there packaging differences between these parts? A: BP08KE is supplied in standard packaging (not specified). BPA08B is supplied in tube packaging. KAP1108E is supplied in tube packaging. Tube packaging is standard for DIP switch distribution and does not affect component functionality.

Q: Which substitute part has the best long-term availability? A: Both BPA08B and KAP1108E are classified as active products. BPA08B, being a direct C&K product line continuation, represents the manufacturer's recommended upgrade path from the obsolete BP08KE series.

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