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Manufacturer: HVR

SR Series: shock-resistant resistors for PCB assembly

SR Series: PCB Mounting Shock Resistors

  • High shock energy rating
  • Compact size
  • Designed for PCB mounting
  • Custom solutions available

Typical Applications:

Soft start of DC-link capacitors in power converter supplies

Surge discharge in power circuits

The SR series of shock resistors for PCB mounting are manufactured from a precisely blended mixture of clay, aluminum oxide, and carbon. After mixing, the material is pressed into a specific shape and then fired under controlled conditions at high temperature.

This sintering process produces a ceramic, carbon resistor that is 100% active material with minimal dimensions. The SR series features gold-plated brass pins for easy PCB mounting. Dielectric and mechanical strength are enhanced by a UL94V-0 approved epoxy resin coating.

With compact size and a high energy shock resistance rating, the modular SR series is designed to provide an optimal solution for various power electronics applications, particularly for soft start of DC-link capacitors in power converter supplies. Being inherently non-inductive and capable of withstanding momentary high-voltage impulses, the SR series is equally effective in surge protection and surge discharge in power circuits.

Technical Specification

For SR shock resistors with shock energy rating of 250 J - 650 J:

Disc Type Model General Dimensions Active Capacity Max Joules at 25°C Max Power at 25°C Thermal Time Constant (T.T.C.) Weight Aspect Ratio (A/L) Resistance Range
Do Max Lo Max LpZakr.
Units (cm) (cm) (cm) (cm3) (J) (W) (s) (g) (cm) Ohm Ohm
SR 0250 1111 13 15 12-11 1 250 1,5 165 3,5 0,9 12R0 5K6
SR 0325 1114 13 18 14-15 1,3 325 1,75 185 4 0,7 15R0 6K8
SR 0400 1117 13 21 17-18 1,6 400 2 200 5 0,6 18R0 8K2
SR 0550 1414 16 18 14-15 2,2 550 2,25 245 6,5 1,1 10R0 4K7
SR 0650 1417 16 21 17-18 2,6 650 2,5 260 7 0,9 12R0 5K6


For SR shock resistors with shock energy rating of 660 J - 1.8 kJ:

Disc Type Model General Dimensions Active Capacity Max Joules at 25°C Max Power at 25°C Thermal Time Constant (T.T.C.) Weight Aspect Ratio (A/L) Resistance Range
Do Max Lo Max LpZakr.
Units (cm) (cm) (cm) (cm3) (J) (W) (s) (g) (cm) Ohm Ohm
SR 0775 1911 21 15 12-11 3,1 775 3 260 9 2,6 3R9 1K8
SR 1000 1914 21 18 14-15 4 1000 3,5 285 10,5 2 5R6 2K7
SR 1200 1917 21 21 17-18 4,8 1200 3,75 320 13 1,7 6R8 3K3
SR 1425 1920 21 24 20-21 5,7 1425 4,25 335 15 1,4 8R2 3K9
SR 1775 1925 21 29 25-26 7,1 1775 5 355 18 1,1 10R0 4K7


For SR shock resistors with shock energy rating of 1.9 kJ - 10.4 kJ:

Disc Type Model General Dimensions Active Capacity Max Joules at 25°C Max Power at 25°C Thermal Time Constant (T.T.C.) Weight Aspect Ratio (A/L) Resistance Range
Do Max Lo Max LpZakr.
Units (cm) (cm) (cm) (cm3) (J) (W) (s) (g) (cm) Ohm Ohm
SR 2250 2420 26 24 20-21 9 2250 5,75 390 22,5 2,3 4R7 2K2
SR 2825 2425 26 29 25-26 11,3 2825 6,5 435 28 1,8 5R6 2K7
SR 3500 2431 26 35 31-32 14 3500 7,5 465 34 1,5 6R8 3K3
SR 4175 2437 26 41 37-38 16,7 4175 8,5 490 40 1,2 10R0 4K7
SR 5200 2446 26 50 46-47 20,8 5200 10 520 50 1 10R0 4K7
SR 6975 3137 33 41 37-38 27,9 6975 11,5 605 66 2 5R6 2K7
SR 8675 3146 33 50 46-47 34,7 8675 13,25 655 81,5 1,6 6R8 3K3
SR 10375 3155 33 59 55-56 41,5 10375 15,25 680 97 1,4 8R2 3K9
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SR Series: PCB Mounting Shock Resistors

  • High shock energy rating
  • Compact size
  • Designed for PCB mounting
  • Custom solutions available

Typical Applications:

Soft start of DC-link capacitors in power converter supplies

Surge discharge in power circuits

The SR series of shock resistors for PCB mounting are manufactured from a precisely blended mixture of clay, aluminum oxide, and carbon. After mixing, the material is pressed into a specific shape and then fired under controlled conditions at high temperature.

This sintering process produces a ceramic, carbon resistor that is 100% active material with minimal dimensions. The SR series features gold-plated brass pins for easy PCB mounting. Dielectric and mechanical strength are enhanced by a UL94V-0 approved epoxy resin coating.

With compact size and a high energy shock resistance rating, the modular SR series is designed to provide an optimal solution for various power electronics applications, particularly for soft start of DC-link capacitors in power converter supplies. Being inherently non-inductive and capable of withstanding momentary high-voltage impulses, the SR series is equally effective in surge protection and surge discharge in power circuits.

Technical Specification

For SR shock resistors with shock energy rating of 250 J - 650 J:

Disc Type Model General Dimensions Active Capacity Max Joules at 25°C Max Power at 25°C Thermal Time Constant (T.T.C.) Weight Aspect Ratio (A/L) Resistance Range
Do Max Lo Max LpZakr.
Units (cm) (cm) (cm) (cm3) (J) (W) (s) (g) (cm) Ohm Ohm
SR 0250 1111 13 15 12-11 1 250 1,5 165 3,5 0,9 12R0 5K6
SR 0325 1114 13 18 14-15 1,3 325 1,75 185 4 0,7 15R0 6K8
SR 0400 1117 13 21 17-18 1,6 400 2 200 5 0,6 18R0 8K2
SR 0550 1414 16 18 14-15 2,2 550 2,25 245 6,5 1,1 10R0 4K7
SR 0650 1417 16 21 17-18 2,6 650 2,5 260 7 0,9 12R0 5K6


For SR shock resistors with shock energy rating of 660 J - 1.8 kJ:

Disc Type Model General Dimensions Active Capacity Max Joules at 25°C Max Power at 25°C Thermal Time Constant (T.T.C.) Weight Aspect Ratio (A/L) Resistance Range
Do Max Lo Max LpZakr.
Units (cm) (cm) (cm) (cm3) (J) (W) (s) (g) (cm) Ohm Ohm
SR 0775 1911 21 15 12-11 3,1 775 3 260 9 2,6 3R9 1K8
SR 1000 1914 21 18 14-15 4 1000 3,5 285 10,5 2 5R6 2K7
SR 1200 1917 21 21 17-18 4,8 1200 3,75 320 13 1,7 6R8 3K3
SR 1425 1920 21 24 20-21 5,7 1425 4,25 335 15 1,4 8R2 3K9
SR 1775 1925 21 29 25-26 7,1 1775 5 355 18 1,1 10R0 4K7


For SR shock resistors with shock energy rating of 1.9 kJ - 10.4 kJ:

Disc Type Model General Dimensions Active Capacity Max Joules at 25°C Max Power at 25°C Thermal Time Constant (T.T.C.) Weight Aspect Ratio (A/L) Resistance Range
Do Max Lo Max LpZakr.
Units (cm) (cm) (cm) (cm3) (J) (W) (s) (g) (cm) Ohm Ohm
SR 2250 2420 26 24 20-21 9 2250 5,75 390 22,5 2,3 4R7 2K2
SR 2825 2425 26 29 25-26 11,3 2825 6,5 435 28 1,8 5R6 2K7
SR 3500 2431 26 35 31-32 14 3500 7,5 465 34 1,5 6R8 3K3
SR 4175 2437 26 41 37-38 16,7 4175 8,5 490 40 1,2 10R0 4K7
SR 5200 2446 26 50 46-47 20,8 5200 10 520 50 1 10R0 4K7
SR 6975 3137 33 41 37-38 27,9 6975 11,5 605 66 2 5R6 2K7
SR 8675 3146 33 50 46-47 34,7 8675 13,25 655 81,5 1,6 6R8 3K3
SR 10375 3155 33 59 55-56 41,5 10375 15,25 680 97 1,4 8R2 3K9
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