1. General Overview

️· Product: Cherry MX D4 Series Switch
️· Datasheet Revision: Page 1 of 2, Last saved by 2015-02-26 (Specifications Subject to Change)

2. Electrical Specifications (Contact Ratings)

Contact	EN61058 (Rating)	UL1054 (Rating)
1	0.1 (0.5) A, 250 VAC; 0.5 A, 30 VDC; 1 (1) A, 250 VAC	0.1 A, 125/250 VAC; 0.5 A, 30 VDC; 1 A, 125 VAC
2	3 (1) A, 250 VAC	3 A, 125/250 VAC; 1/10 HP, 250 VAC
3	6 (2) A, 250 VAC	5 A, 125/250 VAC; ¼ HP, 250 VAC
4	10 (3) A, 250 VAC	10 A, 125/250 VAC; 6 A, 30 VDC; ½ HP, 125/250 VAC
5	16 (4) A, 250 VAC	15 A, 125/250 VAC; ½ HP, 125-250 VAC
8	21 (8) A, 250 VAC	21 A, 250 VAC; 1 HP, 125 VAC; 2 HP, 250 VAC

️· UL File Number: E314201

3. Environmental and Mechanical Specifications

️· Operating Temperature: -40 °C to 125/150 °C (-40 °F to 257/302 °F)
️· Flammability Rating: UL 94V-0
️· Extended Life Options: Available (but details are not provided).
️· Operating Force: 70 - 280 cN (without actuator)
️· Total Travel: 1.6 mm
️· Ingress Protection: IP50

4. Material Specifications

️· Case: Thermoplastic Polyester (PET)
️· Cover: Thermoplastic Polyester (PET)
️· Actuating Button: Thermoplastic Acetyl (POM) or Thermoplastic Polyester (PET)
️· Contacts: Gold Cross Point (D41), Silver (D42), Silver Alloy (D43-D48)
️· Terminals: Brass
️· Auxiliary Actuator: Stainless Steel or Cold-Rolled Steel (Nickel Plated)
️· Moving Blade: Silver Plated Brass

5. Terminal Options (mm/inches)

Terminal	Description
A1	Welding
B8	Short Solder
C1	2.8 x 0.8 (0.110 x 0.032) QC, bifurcated straight (not for D45 or D48)
C3	2.8 x 0.8 (0.110 x 0.032) QC, bifurcated dog leg (not for D45 or D48)
P4	1.2 x 0.5 (0.047 x 0.020) PCB, underside (not available for D48)
P5	1.2 x 0.5 (0.047 x 0.020) PCB, rear (not available for D48)
PA	1.2 x 0.5 (0.047 x 0.020) PCB, housing side (not available for D48)
PB	1.2 x 0.5 (0.047 x 0.020) PCB, cover side (not available for D48)
Q1	4.8 x 0.8 (0.187 x 0.032) QC, straight (not available for D48)
Q3	4.8 x 0.8 (0.187 x 0.032) QC, dog leg (not available for D48)
R1	4.8 x 0.5 (0.187 x 0.020) QC, straight
R3	4.8 x 0.5 (0.187 x 0.020) QC, dog leg
S1	Solder with temp stop
V1	6.3 x 0.8 (0.250 x 0.032) QC, straight
V3	6.3 x 0.8 (0.250 x 0.032) QC, dog leg
W9	Screw
Y5	6.3 x 0.8 (0.250 x 0.032) QC, 5 mm grid
Z5	6.3 x 0.8 (0.250 x 0.032) QC, 7 mm grid

6. Actuator Options

Actuator	Description	Actuation Length
AA	Button	N/A
JA	SS lever, standard ratio	21.2 (0.835)
JD	SS lever, standard ratio	35.6 (1.4)
JL	SS lever, standard ratio	69.9 (2.75)
KA	SS lever, high ratio	25.7 (1.01)
KL	SS lever, high ratio	74.4 (2.93)
LA	Lever, standard ratio	21.2 (0.835)
LD	Lever, standard ratio	35.6 (1.4)
LL	Lever, standard ratio	69.9 (2.75)
MA		25.7 (1.01)
ML		74.4 (2.93)
RA		20.6 (0.811)
RD		34.1 (1.34)
SA		20.6 (0.811)
TA		25.1 (0.988)
TD		38.6 (1.52)
UA		25.1 (0.988)

Important Notes:

️· D48 Limitations: Certain terminal types (C1, C3, P4, P5, PA, PB, Q1, Q3) and the standard PCB mount types are *not* available for the D48 variant.
️· Actuation Lengths: The actuation length is listed for the lever types, but not for the button style.
️· Missing Details: The datasheet lacks specific details about extended life options.
️· Revision: This is an older datasheet (2015) and specifications could have changed since then.

This summary attempts to be comprehensive, but it'll be vital to consult the full datasheet for any critical design decisions.