TS01CBF Slide Switch SPDT Equivalent & Substitute Parts

Part Overview

The TS01CBF is a slide switch manufactured by C&K with SPDT (Single Pole Double Throw) configuration rated for 0.4VA at 20V. This through-hole component features a polyamide actuator with gold-plated copper alloy contacts and is sealed with epoxy and RTV rubber. The product is classified as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Key Parameters

Parameter	TS01CBF Value
Manufacturer	C&K
Circuit Configuration	SPDT
Switch Function	On-On
Current Rating	0.4VA (AC/DC)
Voltage Rating - AC	20V
Voltage Rating - DC	20V
Mounting Type	Through Hole
Termination Style	PC Pin
Actuator Length	3.10mm
Contact Material	Copper Alloy
Contact Finish	Gold
Operating Temperature Range	-30°C to 85°C
Electrical Life	60,000 Cycles
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution logic for the TS01CBF is based on matching critical electrical and mechanical parameters. The primary substitution criteria are:

Electrical Compatibility: Current rating of 0.4VA (AC/DC) and voltage rating of 20V (AC/DC) define the low-power switching category. Parts meeting these exact specifications are direct substitutes.

Mechanical Compatibility: Through-hole mounting with PC pin termination, SPDT circuit configuration, and On-On switch function are mandatory for form-fit-function equivalence.

Physical Compatibility: Actuator length of 3.10mm and switch travel of 3.05mm establish the mechanical envelope. Variations in actuator length indicate different physical designs and may require PCB layout verification.

Material and Environmental: Gold-plated contacts and polyamide actuators with operating temperature range of -30°C to 85°C define the environmental performance class. Contact finish (gold vs. silver) affects signal integrity in low-current applications.

Reliability: Electrical life of 60,000 cycles establishes the expected operational durability. Substitute parts with lower cycle ratings represent reduced reliability margins.

Substitute parts are grouped into two categories:

Category A - Direct Electrical Equivalents (0.4VA, 20V): Parts with identical current and voltage ratings, matching contact finish, and comparable electrical life. These include 48BFSP1M2RT, 4S1-FSP1-M2RE, 500RSP1S1M2RE, AS12AP, and AS12CP.

Category B - Higher-Rated Alternatives (3A, 125V/120V): Parts with significantly higher current and voltage ratings (48BFSP1M2QT, 4S1-FSP1-M2QE, 500ASSP1M2QE). These are suitable only when circuit design permits over-specification and space constraints allow larger actuators.

Parameter Comparison

Parameter	TS01CBF	48BFSP1M2RT	4S1-FSP1-M2RE	500RSP1S1M2RE	AS12AP	AS12CP	SS12SBP4
Manufacturer	C&K	Grayhill Inc.	Carling Technologies	E-Switch	NKK Switches	NKK Switches	NKK Switches
Circuit	SPDT	SPDT	SPDT	SPDT	SPDT	SPDT	SPDT
Current Rating	0.4VA	0.4VA	0.4VA	0.4VA	0.4VA	0.4VA	0.4VA
Voltage Rating - AC	20V	20V	20V	20V	28V	28V	28V
Voltage Rating - DC	20V	20V	20V	20V	28V	28V	28V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination Style	PC Pin	PC Pin	PC Pin	PC Pin	PC Pin	PC Pin	PC Pin
Actuator Length	3.10mm	3.10mm	3.00mm	2.80mm	2.50mm	3.80mm	2.00mm
Contact Material	Copper Alloy	Copper Alloy	Gold (Au)	—	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Contact Finish	Gold	Gold	Gold	—	Gold	Gold	Gold
Operating Temperature	-30°C to 85°C	-30°C to 85°C	-30°C to 85°C	-20°C to 80°C	-30°C to 85°C	-30°C to 85°C	-15°C to 60°C
Electrical Life	60,000 Cycles	30,000 Cycles	30,000 Cycles	40,000 Cycles	50,000 Cycles	50,000 Cycles	10,000 Cycles
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (Direct Equivalents):

48BFSP1M2RT (Grayhill Inc.) and 4S1-FSP1-M2RE (Carling Technologies) are the preferred direct substitutes. Both maintain 0.4VA at 20V electrical specifications with gold-plated contacts. 48BFSP1M2RT matches the actuator length of 3.10mm exactly. 4S1-FSP1-M2RE uses a 3.00mm actuator with gold contact material (Au) rather than plated finish, providing equivalent low-current performance. Both are active products with ROHS3 compliance and unlimited MSL rating.

Secondary Substitutes (Acceptable with Verification):

500RSP1S1M2RE (E-Switch) meets electrical specifications but operates at a reduced temperature range (-20°C to 80°C) and has lower electrical life (40,000 cycles). This part is suitable for applications not requiring the full -30°C to 85°C range. AS12AP and AS12CP (NKK Switches) are rated for 0.4VA at 28V, exceeding the 20V requirement. These parts are acceptable for 20V circuits as the higher voltage rating provides design margin. AS12AP has a 2.50mm actuator; AS12CP has a 3.80mm actuator, requiring PCB layout verification.

Not Recommended:

SS12SBP4 (NKK Switches) has significantly reduced electrical life (10,000 cycles) compared to the TS01CBF (60,000 cycles), representing a 6:1 reduction in operational durability. This part is unsuitable for applications requiring the specified cycle life. Higher-rated parts (48BFSP1M2QT, 4S1-FSP1-M2QE, 500ASSP1M2QE) with 3A ratings are over-specified for 0.4VA circuits and should be used only when circuit topology requires higher current capacity.

All recommended substitutes carry ROHS3 compliance and unlimited MSL rating, matching the environmental qualification of the TS01CBF.

Frequently Asked Questions (FAQ)

Q: Can I use a 3A-rated switch in place of the 0.4VA TS01CBF?

A: Higher-rated switches such as 48BFSP1M2QT (3A, 125V) are electrically compatible with 0.4VA circuits. The switch will operate correctly at lower current levels. However, over-specification increases component cost and may require larger PCB footprint. Use higher-rated parts only when circuit design requires the additional current capacity.

Q: What is the difference between gold-plated and gold contact material?

A: Gold-plated contacts (copper alloy with gold finish) and solid gold (Au) contacts both provide low contact resistance suitable for 0.4VA switching. The TS01CBF uses plated contacts. Substitute 4S1-FSP1-M2RE uses solid gold material. Both are acceptable for the specified application.

Q: Does actuator length affect PCB compatibility?

A: Yes. The TS01CBF has a 3.10mm actuator length. Substitutes with different actuator lengths (2.50mm, 2.80mm, 3.00mm, 3.80mm) may require PCB layout modification. Verify actuator clearance and mounting hole alignment before design release. 48BFSP1M2RT (3.10mm) and 4S1-FSP1-M2RE (3.00mm) require minimal layout changes.

Q: Why does electrical life vary among substitutes?

A: Electrical life reflects the manufacturer's tested operational durability under specified conditions. The TS01CBF is rated for 60,000 cycles. Substitutes with lower ratings (30,000 to 50,000 cycles) have reduced durability margins. For applications requiring 60,000+ cycles, select 500RSP1S1M2RE (40,000 cycles) or AS12AP/AS12CP (50,000 cycles) as minimum acceptable alternatives.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitutes carry ROHS3 compliance and unlimited MSL rating, matching the environmental qualification of the TS01CBF. No additional environmental testing is required for substitution.

Q: Can I use SS12SBP4 as a substitute?

A: SS12SBP4 is electrically compatible but has 10,000 cycles electrical life versus 60,000 cycles for the TS01CBF. This represents a significant reduction in operational durability. Use SS12SBP4 only for applications with cycle life requirements below 10,000 cycles.

Q: What is the difference between 20V and 28V voltage ratings?

A: The TS01CBF is rated for 20V (AC/DC). Substitutes rated for 28V (AS12AP, AS12CP, SS12SBP4) have higher voltage margins and are compatible with 20V circuits. The higher rating provides design margin but does not affect switching performance at 20V.

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