Switch (Toggle, Rocker and DIP)Latching SPST on-off switch

Flip it and it stays.

Manufacturer-referenced

C&K (Littelfuse) · 7101SYZQE

Miniature toggle7000 Series Miniature Toggle Switches, revised 10/02/26

A toggle, rocker or DIP switch latches: it stays in the position it was put in until it is moved again. Used as an on-off switch it connects or disconnects two terminals, so a circuit can be powered, enabled or configured without a program holding it. The six switches here run from 50 mA to 20 A. The CTS 206 DIP switch carries only 50 mA at 24 V DC switching: a DIP switch sets configuration bits, never power. The KCD11 rocker carries 1 A at 250 V AC, the E-Switch 200 and 100 toggles 3 A at 120 V AC or 28 V DC and 5 A at 120 V AC or 28 V DC, the C&K 7101 toggle 5 A at 120 V AC or 28 V DC, and the E-Switch ST4 20 A at 6–30 V DC. Contact resistance runs from 10 mΩ (the C&K and E-Switch 100 toggles) to 100 mΩ (rocker). The toggles and the rocker are panel parts: they mount in a front panel and are wired to the board, so their PCB footprint is a 2-pin header. The DIP switch solders straight into the board. The page, ProTech and the footprints number the terminals 1 and 2; the third terminal of the SPDT toggles is not used for on-off. ProTech’s LED toggle switch (small, medium, large) is the E-Switch 200, 100 and ST4; its lit tip is ProTech’s display of the position, the real bat is plain.

Real View

C&K 7101 miniature toggle switch: dark case, threaded bushing with a hex nut, chrome bat lever tilted 25 degrees and three solder lugs 4.70 mm apart.

Pinout

7101SYZQEMiniature toggleLugs 2 (common) and 1 wired to header pads 2 and 1; lug 3 free

PCB Footprint

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3D View

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2Physical pins 7101SYZQEMiniature toggle Manufacturer-referencedC&K, Shou Han, CTS, E-Switch

Pin diagram

Select a pin to explore its connection

Package map

Highlight

7101SYZQEMiniature toggleLugs 2 (common) and 1 wired to header pads 2 and 1; lug 3 free

Click a lead or use the arrow keys. Lugs 2 (common) and 1 wired to header pads 2 and 1; lug 3 free

PIN 1 · Switch contact

1

Contact terminal 1

Function

Toggle: end lug 1 (C&K) or terminal 3 (E-Switch). Rocker: one tab. DIP switch: pin 1, the square pad. Panel switches reach the board on header pad 1.

How to connect

Connect to the supply or signal being switched.

Electrical note

A switch has no polarity; respect the voltage and current rating of the switch chosen.

Key specifications

Pick the switch by the load: a DIP switch sets logic levels (50 mA), a rocker or toggle switches power. Wire the switch in the positive feed so the load is dead when it is off, and stay inside the rating for the kind of load (lamps and motors draw several times their running current at switch-on).

Contact rating50 mA – 20 A DIP · rocker 1 A · toggles 3–20 A (resistive)

Contact resistance10–100 mΩ maximum, initial

Rated voltage24–250 V · DIP 24 V DC, toggles 28–30 V DC / 120–250 V AC, rocker 250 V AC

Life6 000–100 000 cycles by switch

Operating profile

Supply, signals and operating conditions

Switch (Toggle, Rocker and DIP) operating profile
Parameter	Value	Conditions / notes
Selected package	Miniature toggle	7101SYZQE · 2 circuit terminals
Contact	SPST, latching	Stays where it is put
Example circuit	12 V · 0.5 A	Toggle or rocker in a lamp feed

Package details

7101SYZQE · Miniature toggle

Selected package

Selected Switch (Toggle, Rocker and DIP) physical package
Property	Details
Manufacturer	C&K (Littelfuse)
Part number	7101SYZQE
Package	Miniature toggle
Connections	2 pins
Mounting	Panel mount · wired to a 2-pin header
Lead pitch	2.54 mm pitch
Package code	switch-connector
Thermal reference	Contact heating at the rating: (5 A)² × 10 mΩ = 0.25 W

Selected parts and terminals

Manufacturer scope and page conventions

Manufacturer specifications 6 parameters

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Parameter	Value	Conditions / notes
Reference parts	C&K (Littelfuse) 7101SYZQE · Shou Han KCD11-2P · CTS 206-1S · E-Switch 200MSP6T1B1M2QE · 100SP1T1B1M1QE · ST4SP2DT1C2	One sheet each
Contact form	SPST on-off, latching	The C&K and E-Switch 200 / 100 toggles are SPDT: the common terminal 2 and one end terminal make the on-off switch
Terminal 1	Toggle lug 1 (E-Switch: terminal 3) · rocker tab · DIP pin 1 (square)	ProTech pin 1 · footprint pad 1
Terminal 2	Toggle terminal 2 (common) · rocker tab · DIP pin 2	ProTech pin 2 · footprint pad 2
Panel switches	Toggles and rocker wired to a 2-pin header	Their own lugs are not PCB pins
Proteus symbol	SWITCH	2 pins; ProTech’s Toggle Switch models it

A panel switch’s wires go to the header; the header is what the PCB carries.

The six switches

From each manufacturer’s sheet · the numbers ProTech’s model and checks use

Manufacturer specifications 13 parameters

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Specification	C&K (Littelfuse) 7101SYZQE	Shou Han KCD11-2P	CTS 206-1S	E-Switch 200MSP6T1B1M2QE	E-Switch 100SP1T1B1M1QE	E-Switch ST4SP2DT1C2
Contact rating (resistive)	5 A at 120 V AC or 28 V DC; 2 A at 250 V AC (silver)	1 A at 250 V AC (no DC rating in the sheet)	50 mA at 24 V DC switching; 100 mA or 50 V DC carrying	3 A at 120 V AC or 28 V DC; 1 A at 250 V AC (silver)	5 A at 120 V AC or 28 V DC; 2 A at 250 V AC (silver)	20 A at 6–30 V DC; 16(8) A at 125/250 V AC
Minimum load	gold contacts: 0.4 VA max at 20 V	not in datasheet	not in datasheet	gold contacts: 0.4 VA max at 20 V	gold contacts: 0.4 VA max at 20 V	not in datasheet
Contact resistance	10 mΩ maximum (initial)	100 mΩ maximum (initial)	50 mΩ maximum (initial)	20 mΩ maximum (initial)	10 mΩ maximum (initial)	50 mΩ maximum (initial)
Insulation resistance	≥ 10⁹ Ω	≥ 100 MΩ at 500 V DC	≥ 1000 MΩ	≥ 1000 MΩ	≥ 1000 MΩ	≥ 50 MΩ
Dielectric strength	1000 V rms	1500 V AC between terminals	500 V AC for 1 min	1000 V rms	1000 V rms	1500 V rms
Operation	lever, two positions 25° each side	rocker, two positions (O and —)	slide, two positions	lever, two positions 25° each side	lever, two positions 25° each side; torque max 5 kg·cm	17 mm metal bat, two positions (OFF-ON)
Travel	lever 10.67 mm above the bushing	rocker 12 × 6.3 mm, about 3 mm proud	travel 2.03 mm	lever 9.40 mm above the bushing	lever 10.41 mm above the bushing	bat 17.00 mm above the bushing
Life	100 000 electrical cycles at full load	10 000 mechanical cycles	10 000 cycles at 50 mA, 24 V DC	30 000 mechanical, 6 000 at full load	40 000 mechanical, 6 000 at full power	10 000 electrical cycles
Contact bounce	not in the sheet	not in the sheet	not in the sheet	not in the sheet	not in the sheet	not in the sheet
Operating temperature	−30 to +85 °C	−25 to +85 °C	−55 to +85 °C	−40 to +85 °C	−40 to +85 °C	−10 to +55 °C
Size	case 12.70 × 6.86 mm, 1/4-40 bushing, hex nut	bezel 15 × 10.5 mm, panel cut-out 14 × 8.8 mm	9.78 × 3.96 mm, 7.6 mm high	case 8.13 × 8.64 mm, 10-48 bushing 5.59 mm, nut 7.00 mm A/F	case 12.70 × 8.89 mm, 1/4-40 bushing 8.89 mm	case 28.80 × 21.00 mm, 15/32-32 bushing Ø12 mm, IP68
Terminals	4.70 mm (SPDT; pins 2 common and 1 used for ON-OFF)	5.0 mm (2 pins, snap-in panel mount)	7.62 mm row spacing (2 pins)	2.54 mm (PC pins 1-2-3; pins 2 common and 3 used for OFF-ON)	4.70 mm (solder lugs 1-2-3; pins 2 common and 3 used for ON-OFF)	1/4 in quick-connect tabs (panel mount)
Look	chrome bat lever, nickel-plated hex nut and bushing, dark case	black bezel and rocker, O and bar marks	blue housing, white slider, ON arrow	side view: case, nickel bushing and nut, chrome bat lever; its tip lit red OFF, green ON (ProTech's display; the real bat is plain)	side view: case, nickel bushing and nut, chrome bat lever; its tip lit red OFF, green ON (ProTech's display; the real bat is plain)	side view: case, nickel bushing and nut, chrome bat lever; its tip lit red OFF, green ON (ProTech's display; the real bat is plain)

Contact resistance is the initial maximum; it rises with wear and contamination. Ratings are for resistive loads.

How ProTech models it

The same numbers drive the simulator, its checks and this page

Manufacturer specifications 6 parameters

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Parameter	Value	Conditions / notes
Closed	Rc of the switch chosen, between pins 1 and 2	10 mΩ toggle · 100 mΩ rocker · 50 mΩ DIP · 20 mΩ / 10 mΩ / 50 mΩ E-Switch 200 / 100 / ST4
Open	No branch	Insulation resistance not modelled
Rating check	Warns above the switch’s current or voltage	5 A / 28 V · 1 A / 250 V · 50 mA / 24 V · 3 A / 28 V · 5 A / 28 V · 20 A / 30 V
Position	Saved with the circuit	A click or Enter flips it while running
Size	Drawn at true size	Toggle 12.70 × 6.86 mm, rocker 15 × 10.5 mm, DIP 9.78 × 3.96 mm, E-Switch toggles 8.13, 12.70 and 28.80 mm wide
LED toggle switch	The E-Switch 200, 100 and ST4 (small, medium, large)	Its lit tip, red OFF and green ON, is ProTech’s display; the real bat is plain

Change the switch in Properties: the drawing, rating, contact resistance and PCB footprint follow it.

Switching a 12 V, 0.5 A lamp feed

Toggle or rocker in the positive wire

Manufacturer specifications 6 parameters

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Parameter	Value	Conditions / notes
Toggle drop	5 mV	0.5 A × 10 mΩ
Toggle contact heating	2.5 mW	(0.5 A)² × 10 mΩ
Rocker drop	50 mV	0.5 A × 100 mΩ
Rocker contact heating	25 mW	(0.5 A)² × 100 mΩ
Rocker on DC	Check first	The KCD11 sheet gives 1 A at 250 V AC and no DC rating
DIP switch	Never	Rated 50 mA switching; use it for logic inputs

Lamps draw about ten times their running current when cold: derate the switch for them.

Package

7101SYZQE · Miniature toggle

Manufacturer specifications 8 parameters

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Parameter	Value	Conditions / notes
Toggle	case 12.70 × 6.86 mm, 1/4-40 bushing, hex nut	4.70 mm (SPDT; pins 2 common and 1 used for ON-OFF)
Rocker	bezel 15 × 10.5 mm, panel cut-out 14 × 8.8 mm	5.0 mm (2 pins, snap-in panel mount)
DIP switch	9.78 × 3.96 mm, 7.6 mm high	7.62 mm row spacing (2 pins)
E-Switch 200	case 8.13 × 8.64 mm, 10-48 bushing 5.59 mm, nut 7.00 mm A/F	2.54 mm (PC pins 1-2-3; pins 2 common and 3 used for OFF-ON)
E-Switch 100	case 12.70 × 8.89 mm, 1/4-40 bushing 8.89 mm	4.70 mm (solder lugs 1-2-3; pins 2 common and 3 used for ON-OFF)
E-Switch ST4	case 28.80 × 21.00 mm, 15/32-32 bushing Ø12 mm, IP68	1/4 in quick-connect tabs (panel mount)
Header (panel switches)	2.54 mm pitch, Ø1 mm drill	KiCad PinHeader_1x02_P2.54mm_Vertical
DIP footprint	7.62 mm row spacing, Ø0.8 mm drill	KiCad SW_DIP_SPSTx01_Slide_9.78x4.72mm_W7.62mm_P2.54mm

Footprints are KiCad’s, the same as ProTech’s PCB page.

Connections by function

Select a pin for its function, connection guidance and electrical notes.

Switch contact2 pins

Switch (Toggle, Rocker and DIP) working principle: illustrated functional stages, basic circuit and connections — Select the diagram to read it at full resolution.

How it works

3 stages · Explore one step at a time

Step 1 / 3

A spring holds the contact in place

Inside each switch a spring-loaded contact rests in one of two stable positions; moving the lever, rocker or slider past the middle snaps it into the other.

Step 2 / 3

On: the moving contact bridges the terminals

In the ON position the moving contact presses on both terminals: 10 mΩ for the silver toggle contacts, 100 mΩ for the rocker, 50 mΩ for the DIP slide.

Step 3 / 3

Off: an air gap insulates them

In the OFF position the terminals are separated by insulation: ≥ 10⁹ Ω for the toggle, ≥ 100 MΩ at 500 V DC for the rocker, ≥ 1000 MΩ for the DIP switch.

12 V supply, the toggle switch in the positive wire, a 12 V 0.5 A lamp and the return to the negative terminal; ON lights the lamp, OFF leaves it dead. — Switch the positive feed so the load is dead when off.

Connect it, step by step

Follow the component values and pin connections

Positive feed

Put the switch between the supply’s positive terminal and the load.

Choose by load

0.5 A at 12 V suits the toggle or rocker, never the DIP switch.

Logic instead

For a mode input: switch to ground, pull-up to the supply, 50 mA is plenty.

Cutaway of a miniature toggle switch: the bat lever pushes a spring plunger onto a rocking contact that bridges the centre common lug to one end lug; OFF and ON positions. — Functional cutaway; proportions simplified.

Explore the circuit

Select a stage to see its role and connections

Lever and plunger

The lever pivots in the bushing; inside, a spring plunger rides on the moving contact.

Snap action

Past the centre, the spring tips the contact over: it never rests half-way.

Lugs

The centre lug is common; one end lug closes with it in each position.

Selected packageMiniature toggle7101SYZQE

Physical connections2 pinsPackage-specific numbering

Reference collection6 tables39 parameters & pin functions