ECSS CLASSES

The standard ECSS-Q-ST-60-13C (Commercial electrical, electronic and electromechanical (EEE) components) defines the requirements for selection and evaluation of active (semiconductor) components for space applications. Following groups are defined:

  • Diodes
  • Microwave diodes
  • Integrated circuits
  • Microwave integrated circuits (MMIC)
  • Transistors
  • Microwave transistors

 

Three classes are described in this standard.

 

CLASS 1

 

  TEST SAMPLING /CRITERIA METHOD
1 Construction analysis 5 parts As per clause 4.2.3.3 see Annex H.
2 Mechanical shocks 10 parts min MIL STD 883 TM 2002 condition B – 50 pulses (per orientation) instead of 5 pulses (per orientation).

MIL-STD-750 TM 2016, 1500g, 0,5ms duration – 50 shocks instead of 5 shocks, planes X1, Y1 and Z1.

Vibrations MIL-STD-883, TM 2007 condition A – 120 times (total) instead of 12 times (total).

MIL-STD-750, TM 2056, 20g, 10-2000Hz, cross over at 50Hz – 120 times (total) instead of 12 times (total).

Constant acceleration MIL-STD-883, TM 2001 condition E (resultant centrifugal acceleration to be in the Y1 axis only).

For components which have a package weight of 5 grammes or more, or whose inner seal or cavity perimeter is more than 5 cm, Condition D shall be used.

MIL-STD-750, TM 2006, 20000g, planes X1, Y1 and Y2.

3 Preconditioning

+ 96h HAST (or 1000h THB 85/85)

10 parts

0 defect accepted

HAST 96h-130°C-85%RH (JESD22-A110 with continuous bias) or THB (JESD22-A101).

Electrical test (para-metrical and functional) at 25°C as per the internal supplier’s specification.

Preconditioning: i.a.w. JESD-22-A113 for SMD JESD-22-B106 for through hole.

4 C-SAM 10 parts JEDEC J-STD-020
5 Preconditioning

+ Thermal Cycling

10 parts

0 defect accepted

100 T/C -55°/+125°C (or to the manufacturer storage temp., whichever is less) MIL-STD-750 method 1051 cond.B MIL-STD-883 method 1010 cond.B

Electrical test (para-metrical and functional) at 25°C as per the internal supplier’s specification.

Preconditioning: i.a.w. JESD-22-A113 for SMD JESD-22-B106 for through hole.

6 Seal test 10 parts min MIL-STD-883 TM 1014 condition A or B (fine leak) and condition C (gross leak).

MIL-STD-750 TM 1071 condition H1 or H2 (fine leak) and condition C or K (gross leak with cavity) or condition E (gross leak without cavity).

7 C-SAM 10 parts JEDEC J-STD-020
8 Lifetest 15 parts

0 defect accepted

2000h – 125°C minimum

MIL-STD-750 method 1026 or 1042

MIL-STD-883 method 1005 cond.D

Initial, intermediate (1000h) and final electrical test (para-metrical and functional) at 3 temp as per the internal supplier’s specification

9 External visual inspection 10 parts min ESCC 2055000

ESCC 2059000

10 Radiation Verification Test i.a.w.

ECSS-Q-ST-60-15

See ECSS-Q-ST-60-15

CLASS 2

 

  TEST SAMPLING /CRITERIA METHOD
1 Construction analysis 5 parts As per clause 5.2.3.3 see Annex H.
2 Mechanical shocks 10 parts min MIL STD 883 TM 2002 condition B – 50 pulses (per orientation) instead of 5 pulses (per orientation).

MIL-STD-750 TM 2016, 1500g, 0,5ms duration – 50 shocks instead of 5 shocks, planes X1, Y1 and Z1.

Vibrations MIL-STD-883, TM 2007 condition A – 120 times (total) instead of 12 times (total).

MIL-STD-750, TM 2056, 20g, 10-2000Hz, cross over at 50Hz – 120 times (total) instead of 12 times (total).

Constant acceleration MIL-STD-883, TM 2001 condition E (resultant centrifugal acceleration to be in the Y1 axis only).

For components which have a package weight of 5 grams or more, or whose inner seal or cavity perimeter is more than 5 cm, Condition D shall be used MIL-STD-750, TM 2006, 20000g, planes X1, Y1 and Y2.

3 Preconditioning

+ 96h HAST (or 1000h THB 85/85)

10 parts

0 defect accepted

HAST 96h-130°C-85%RH (JESD22-A110 with continuous bias) or THB (JESD22-A101).

Electrical test (para-metrical and functional) at 25°C as per the internal supplier’s specification

Preconditioning: i.a.w. JESD-22-A113 for SMD JESD-22-B106 for through hole.

4 C-SAM 10 parts JEDEC J-STD-020
5 Preconditioning

+ Thermal Cycling

10 parts

0 defect accepted

100 T/C -55°/+125°C (or to the manufacturer storage temp., whichever is less) MIL-STD-750 method 1051 cond.B MIL-STD-883 method 1010 cond.B.

Electrical test (para-metrical and functional) at 25°C as per the internal supplier’s specification.

Preconditioning: i.a.w. JESD-22-A113 for SMD JESD-22-B106 for through hole.

6 Seal test 10 parts min MIL-STD-883 TM 1014 condition A or B (fine leak) and condition C (gross leak).

MIL-STD-750 TM 1071 condition H1 or H2 (fine leak) and condition C or K (gross leak with cavity) or condition E (gross leak without cavity).

7 C-SAM 10 parts JEDEC J-STD-020

CLASS 3

 

  TEST SAMPLING /CRITERIA METHOD
1 Construction analysis 5 parts As per clause 6.2.3.3see Annex H
2 Preconditioning+ 96h HAST(or 1000h THB85/85) 10 parts0 defect accepted HAST 96h-130°C-85%RH(JESD22-A110 with continuous bias) or THB(JESD22-A101).Electrical test (para-metrical and functional) at 25°C as per the datasheet (selected functional tests and
      Parameters) Preconditioning: i.a.w. JESD-22-A113 for SMD JESD-22-B106 for through hole.
3 Life test 15 parts0 defect accepted 1000h–125°Cminimum.MIL-STD-750 method 1026or1042 MIL-STD-883 method1005 cond .D.

Initial and final electrical test(parametrical and functional)at25°C as per the datasheet

      (Selected functional tests and parameters).
4 C-SAM 10 parts JEDEC J-STD-020
5 Preconditioning

+ Thermal Cycling

10 parts

0 defect accepted

100 T/C -55°/+125°C (or to the manufacturer storage temp., whichever is less) MIL-STD-750 method 1051 cond.B.

MIL-STD-883 method 1010 cond.B.

Electrical test (para-metrical and functional) at 25°C as per the datasheet (selected functional tests and parameters).

Preconditioning: i.a.w. JESD-22-A113 for SMD JESD-22-B106 for through hole.

6 Seal test 10 parts min MIL-STD-883 TM 1014 condition A or B (fine leak) and condition C (gross leak).

MIL-STD-750 TM 1071 condition H1 or H2 (fine leak) and condition C or K (gross leak with cavity) or condition E (gross leak without cavity).

7 C-SAM 10 parts JEDEC J-STD-020
8 Radiation Verification Test i.a.w. ECSS-Q-ST-60-15 See ECSS-Q-ST-60-15

DIFFERENCE BETWEEN THE 3 CLASSES