RESISTOR LEAD FORM AND DIMENSIONS

Difference Between Radial and Axial

A variety of standard lead forms are available from Tokenchina for use where auto-insertion is not available or practical.


Forms vary from simple right angle lead bends, vertical hair pin bends, to lock in styles that lock into the circuit board. This provides for a positive stand-off while holding the part securely in place during further applications.


What is the difference between radial and axial?
  • From a Resistor Point of View －
    The difference is in the lead positions: Radial lead resistors have both leads out the bottom. Axial lead resistors lay on their both sides and have one lead on each end.

  • From a Formed Resistor Point of View －
    Resistors' leads after forming for horizontal mounting is called Axial Type Resistors and for vertical mounting is called Radial Type Resistors.

M Form Dimensions (Unit: mm) - Horizontal Mounting Axial Resistors

Watts Dimensions
ΦD ± 0.5 L ± 1.0 P ± 2.0 H ± 1.0
1 / 8W 1/4WS 1.5 3.2 6 10
1/4W 1/2WS 2.3 6 10 10
1/2W 1WS 3 9 12.5 10
1W 2WS 4 11 15 10
2W 3WS 5 15 20 10
3W 5WS 6 17 25 10
5W   8 24 30 20

MB Form Dimensions (Unit: mm) - Horizontal Mounting Axial Resistors

Watts ΦD ± 0.5 L ± 1 P ± 1 H1 ± 1 H2 ± 0.5 d ± 0.5 t ± 0.2 q Max
1/2W 1WS 3 9 12.5 10.5 4 0.6 1.2 3
1W 2WS 4 11 15 10.5 4 0.8 1.25 3
2W 3WS 5 15 20 10.5 4 0.8 1.25 3
3W 5WS 6 17 25 10.5 4 0.8 1.25 3
5W - 8 24 30 14 6.5 0.8 1.25 3

F Form Dimensions (Unit: mm) - Vertical Mounting Axial Resistors

Watts Dimensions
ΦD ± 0.5 L ± 1.0 P ± 2.0 E Max h1 ± 1.0
1 / 2W 1WS 3 9 6 3.5 5
1W 2WS 4 11 6 3.5 5
2W 3WS 5 15 6 3.5 5
3W 5WS 6 17 6 3.5 5

FK Form Dimensions (Unit: mm) - Vertical Mounting Axial Resistors

Watts Dimensions
ΦD ± 0.5 L ± 1.0 P ± 2.0 E Max h1 ± 1.0 h2Max
1 / 2W 1WS 3 9 6 3.5 5 4
1W 2WS 4 11 6 3.5 5 4
2W 3WS 5 15 6 3.5 5 4
3W 5WS 6 17 6 3.5 5 4

Tape Dimensions (Unti: mm) - Axial Resistors

Tape packed ready for loading onto automatic sequencing and insertion machines.
The standard taping method and critical dimensions are shown in Figure

TYPE T-26 T-52 T-63 T-73
A 26 ± 1 52 ± 1 63 ± 1.5 73 ± 1.5
B 5 ± 0.5 5 ± 0.5 10 ± 0.5 10 ± 0.5
C 5 ± 1 5 ± 1 5 ± 1 5 ± 1
D Max 0.6 Max 0.6 Max 0.8 Max 0.8
E Max 1.2 Max 1.2 Max 1.2 Max 1.2
F 6 ± 1 6 ± 1 6 ± 1 6 ± 1

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