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MIL-HDBK-217F(N2) Parts Count Prediction Calculator

Related Tool: Failure Rate Estimates for Mechanical Components

Background:

This tool implements the MIL-HDBK-217F, Notice 2 (Reliability Prediction of Electronic Equipment), parts count reliability prediction procedure (ref. 1). Application notes are as follows:

1. The part quantity column (last column) defaults to 1 if nothing is entered into this field.
2. Selecting defaults for part quality and/or environmental factors will override all entries in the larger input matrix for these factors. Selecting the "industrial" default for part quality will default the microcircuit quality levels to a value of 3 and will select one level better than worse case for all other part types. See references 3 and 4 for other industry standard approaches.
3. The part quality factor selected (third input column) must be consistent with the part type selected in the second column.
4. If anything is entered into the user defined column (e.g., a part number), then this column will appear in the output, otherwise it is omitted.
5. The first row is used for column labels initially; however, this row is available for use by deleting/overriding the labels.
6. The tool simplifies the microcircuit portion of the MIL-HDBK-217 parts count method by defaulting the learning factor to 1.0 and not providing the quality factor calculations for custom part screening regimes, as both of these are rarely used in practice. If needed, export to Excel to perform these custom calculations.
7. Most browsers remember user input settings when the back button is used allowing easy modification of inputs; however, this may not be true with some versions of Internet Explorer.
8. The "omit part type reference numbers" checkbox eliminates the prefix numbers (1-208) shown in the second column from the output results.
9. See references 3 - 4 for ANSI/VITA recommendations on more favorable part quality factors, essentially 0.1 for chip resistors and capacitors, and a value of 1.0 for most other part types. Export to Excel to make these adjustments.
10. MIL-HDBK-217F, Notice 2, Environmental Descriptions and Assumed Default Operating Temperatures
11. Reliability Adjustment Factors for Electronic Equipment


Calculation Inputs:

Default all part quality factors to:
Default all environmental factors to:

Decimal places:
Omit part type reference numbers
Send results to:

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The following list can help speed device selection above by:
1. Allowing search within this page for a particular device.
2. Providing the associated reference number. This can be typed in after selecting the pull-down above to jump directly to the desired entry.
Numbers below are linked to Google Image Search, which can sometimes be helpful for part categorization.

1. Microcircuits, Bipolar, Gate/Logic Arrays, Digital, 1 - 100 Gates
2. Microcircuits, Bipolar, Gate/Logic Arrays, Digital, 101 - 1000 Gates
3. Microcircuits, Bipolar, Gate/Logic Arrays, Digital, 1001 to 3000 Gates
4. Microcircuits, Bipolar, Gate/Logic Arrays, Digital, 3001 to 10,000 Gates
5. Microcircuits, Bipolar, Gate/Logic Arrays, Digital, 10,000 to 30,000 Gates
6. Microcircuits, Bipolar, Gate/Logic Arrays, Digital, 30,000 to 60,000 Gates
7. Microcircuits, Bipolar, Linear, 1 - 100 Transistors
8. Microcircuits, Bipolar, Linear, 101 - 300 Transistors
9. Microcircuits, Bipolar, Linear, 301 - 1,000 Transistors
10. Microcircuits, Bipolar, Linear, 1001 - 10,000 Transistors
11. Microcircuits, Bipolar, Programmable Logic Arrays, Up to 200 Gates
12. Microcircuits, Bipolar, Programmable Logic Arrays, 201 to 1,000 Gates
13. Microcircuits, Bipolar, Programmable Logic Arrays, 1,001 to 5,000 Gates
14. Microcircuits, MOS, Gate/Logic Arrays, Digital, 1 to 100 Gates
15. Microcircuits, MOS, Gate/Logic Arrays, Digital, 101 to 1,000 Gates
16. Microcircuits, MOS, Gate/Logic Arrays, Digital, 1,001 to 3,000 Gates
17. Microcircuits, MOS, Gate/Logic Arrays, Digital, 3,001 to 10,000 Gates
18. Microcircuits, MOS, Gate/Logic Arrays, Digital, 10,001 to 30,000 Gates
19. Microcircuits, MOS, Gate/Logic Arrays, Digital, 30,000 to 60,000 Gates
20. Microcircuits, MOS, Linear, 1 to 100 Transistors
21. Microcircuits, MOS, Linear, 101 to 300 Transistors
22. Microcircuits, MOS, Linear, 301 to 1,000 Transistors
23. Microcircuits, MOS, Linear, 1001 to 10,000 Transistors
24. Microcircuits, MOS, Floating Gate Programmable Logic Array, Up to 500 Gates
25. Microcircuits, MOS, Floating Gate Programmable Logic Array, 501 - 2,000 Gates
26. Microcircuits, MOS, Floating Gate Programmable Logic Array, 2,001 - 5,000 Gates
27. Microcircuits, MOS, Floating Gate Programmable Logic Array, 5,001 to 20,000 Gates
28. Microcircuits, Bipolar, Microprocessors Up to 8 Bits
29. Microcircuits, Bipolar, Microprocessors Up to 16 Bits
30. Microcircuits, Bipolar, Microprocessors Up to 32 Bits
31. Microcircuits, MOS, Microprocessors Up to 8 Bits
32. Microcircuits, MOS, Microprocessors Up to 16 Bits
33. Microcircuits, MOS, Microprocessors Up to 32 Bits
34. Microcircuits, MOS, Memories, ROM Up to 16K
35. Microcircuits, MOS, Memories, ROM 16K to 64K
36. Microcircuits, MOS, Memories, ROM 64K to 256K
37. Microcircuits, MOS, Memories, ROM 256K to 1 MB
38. Microcircuits, MOS, Memories, PROM, UVEPROM, EEPROM, EAPROM Up to 16K
39. Microcircuits, MOS, Memories, PROM, UVEPROM, EEPROM, EAPROM 16K to 64K
40. Microcircuits, MOS, Memories, PROM, UVEPROM, EEPROM, EAPROM 64K to 256K
41. Microcircuits, MOS, Memories, PROM, UVEPROM, EEPROM, EAPROM 256K to 1 MB
42. Microcircuits, MOS, Memories, DRAM Up to 16K
43. Microcircuits, MOS, Memories, DRAM 16K to 64K
44. Microcircuits, MOS, Memories, DRAM 64K to 256K
45. Microcircuits, MOS, Memories, DRAM 256K to 1 MB
46. Microcircuits, MOS, Memories, SRAM, (MOS and BiMOS) Up to 16K
47. Microcircuits, MOS, Memories, SRAM, (MOS and BiMOS) 16K to 64K
48. Microcircuits, MOS, Memories, SRAM, (MOS and BiMOS) 64K to 256K
49. Microcircuits, MOS, Memories, SRAM, (MOS and BiMOS) 256K to 1 MB
50. Microcircuits, Bipolar, Memories, ROM, PROM Up to 16K
51. Microcircuits, Bipolar, Memories, ROM, PROM 16K to 64K
52. Microcircuits, Bipolar, Memories, ROM, PROM 64K to 256K
53. Microcircuits, Bipolar, Memories, ROM, PROM 256K to 1 MB
54. Microcircuits, Bipolar, Memories, SRAM Up to 16K
55. Microcircuits, Bipolar, Memories, SRAM 16K to 64K
56. Microcircuits, Bipolar, Memories, SRAM 64K to 256K
57. Microcircuits, Bipolar, Memories, SRAM 256K to 1 MB
58. Microcircuits, GaAs MMIC 1 to 100 Elements
59. Microcircuits, GaAs MMIC 101 to 1,000 Active Elements
60. Microcircuits, GaAs Digital 1 to 1000 Active Elements
61. Microcircuits, GaAs Digital 1,001 to 10,000 Active Elements

62. Diodes, General Purpose Analog
63. Diodes, Switching
64. Diodes, Fast Recovery Power Rectifier
65. Diodes, Power Rectifier/Schottky Power
66. Diodes, Transient Suppressor/Varistor
67. Diodes, Voltage Reference/Regulator (Avalanche and Zener)
68. Diodes, Current Regulator
69. Diodes, Si Impatt (freq. less than 35 GHz)
70. Diodes, Gunn/Bulk Effect
71. Diodes, Tunnel and Back
72. Diodes, PIN
73. Diodes, Schottky Barrier and Point Contact (freq. between 200 MHz and 35 GHz)
74. Diodes, Varactor
75. Diodes, Thyristor/SCR
76. Transistors, NPN/PNP (freq. less than 200 MHz, General purpose, bipolar/BJT)
77. Transistors, Power NPN/PNP (freq. less than 200 MHz, bipolar/BJT)
78. Transistors, SiFET(freq. less than 400MHz, MOSFET, JFET, HEXFET)
79. Transistors, Si FET (freq. greater than 400 MHz, MOSFET)
80. Transistors, GaAs FET(Pwr. less than 100mW)
81. Transistors, GaAs FET (Pwr. greater than 100 mW)
82. Transistors, Unijunction
83. Transistors, RF. Low Noise (freq. greater than 200 MHz, Pwr. less than 1W)
84. Transistors, RF, Power (Pwr. greater than 1W, bipolar/BJT)
85. Opto-electronics, Photodetector
86. Opto-electronics, Opto-lsolator (Optocoupler)
87. Opto-electronics, Emitter (Light Emitting Diode, LED)
88. Opto-electronics, Alphanumeric Display
89. Opto-electronics, Laser Diode, GaAs/AI GaAs
90. Opto-electronics, Laser Diode, In GaAs/ln GaAsP

91. Resistors, Composition, RCR, MIL-R-39008
92. Resistors, Composition, RC, MIL-R-11
93. Resistors, Film, Insulated, RLR, MIL-R-39017
94. Resistors, Film, Insulated, RL, MIL-R-22684
95. Resistors, Film, RNR, RNC, RNR, MIL-R-55182
96. Resistors, Film, Chip, RM, MIL-R-55342
97. Resistors, Film, RN, MIL-R-10509
98. Resistors, Film, Power, RD, MIL-R-11804
99. Resistors, Film, Network, RZ, MIL-R-83401
100. Resistors, Wirewound, Accurate, RBR, MIL-R-39005
101. Resistors, Wirewound, Accurate, RB, MIL-R-93
102. Resistors, Wirewound, Power, RWR, MIL-R-39007
103. Resistors, Wirewound, Power, RW, MIL-R-26
104. Resistors, Wirewound, Power, Chassis Mounted, RER, MIL-R-39009
105. Resistors, Wirewound, Power, Chassis Mounted, RE, MIL-R-18546
106. Resistors, Thermistor, RTH, MIL-R-23648
107. Resistors, Wirewound, Variable, RTR, MIL-R-39015
108. Resistors, Wirewound, Variable, RT, MIL-R-27208
109. Resistors, Wirewound, Variable, Precision, RR, MIL-R-12934
110. Resistors, Wirewound, Variable, Semiprecision, RA, MIL-R-19
111. Resistors, Wirewound, Variable, Semiprecision, RK, MIL-R-39002
112. Resistors, Wirewound, Variable, RP, MIL-R-22
113. Resistors, Nonwirewound, Variable, RJR, MIL-R-39035
114. Resistors, Nonwirewound, Variable (RJ, Cermet), MIL-R-22097
115. Resistors, Composition, Variable, RV, MIL-R-94
116. Resistors, Nonwirewound, Variable Precision, RQ, MIL-R-39023
117. Resistors, Film, Variable, RVC, MIL-R-23285
118. Capacitors, Paper, By-Pass, CP, MIL-C-25
119. Capacitors, Paper, By-Pass, CA, MIL-C-12889
120. Capacitors, Paper/Plastic, Feed-through, CZ, CZR, MIL-C-11693
121. Capacitors, Paper/Plastic Film, CQ, CQR, MIL-C-19978
122. Capacitors, Metallized Plastic/Plastic, CH, MIL-C-18312
123. Capacitors, Metallized Paper/Plastic, CHR, MIL-C-39022
124. Capacitors, Metallized Paper/Plastic, CFR, MIL-C-55514
125. Capacitors, Metallized Plastic, CRH, MIL-C-83421
126. Capacitors, MICA (Dipped), CM, MIL-C-5
127. Capacitors, MICA (Dipped or Molded), CMR, MIL-C-39001
128. Capacitors, MICA (Button), CB, MIL-C-10950
129. Capacitors, Glass, CYR, MIL-C-23269
130. Capacitors, Glass, CY, MIL-C-11272
131. Capacitors, Ceramic (General Purpose), CK, MIL-C-11015
132. Capacitors, Ceramic (General Purpose), CKR, MIL-C-39014
133. Capacitors, Ceramic (Temperature Compensated), CC, CCR, MIL-C-20
134. Capacitors, Ceramic Chip, , MIL-C-55681
135. Capacitors, Tantalum, Solid, CSR, MIL-C-39003
136. Capacitors, Tantalum, Chip, CWR, MIL-C-55365
137. Capacitors, Tantalum, Non-Solid, OP., MIL-C-39006
138. Capacitors, Tantalum, Non-Solid, CL, MIL-C-3965
139. Capacitors, Tantalum, Non-Solid, CRL, MIL-C-83500
140. Capacitors, Aluminum Oxide, CU, CUR, MIL-C-39018
141. Capacitors, Aluminum Dry, CE, MIL-C-62
142. Capacitors, Variable, Ceramic, CV, MIL-C-81
143. Capacitors, Variable, Piston, PC, MIL-C-14409
144. Capacitors, Variable, Air Trimmer, CT, MIL-C-92
145. Capacitors, Variable, Vacuum, CG, MIL-C-23183

146. Inductive Devices, Transformer, Switching, MIL-T-21038
147. Inductive Devices, Transformer, Flyback, MIL-T-27
148. Inductive Devices, Transformer, Audio, MIL-T-27
149. Inductive Devices, Transformer, Power, MIL-T-27
150. Inductive Devices, Transformer, RF, MIL-T-55631
151. Inductive Devices, Coil, Fixed Inductor or Choke, (Ferrite bead), MIL-C-15305, MIL-C-39010
152. Inductive Devices, Coil, Variable Inductor, MIL-C-15305
153. Rotating Devices, Motors, General
154. Rotating Devices, Sensor Motor
155. Rotating Devices, Servo Motor
156. Rotating Devices, Stepper Motor
157. Rotating Devices, Synchros
158. Rotating Devices, Resolvers
159. Rotating Devices, Elapsed Time Meters, ETM-AC
160. Rotating Devices, Elapsed Time Meters, ETM-Inverter Driven
161. Rotating Devices, Elapsed Time Meters, ETM-Commutator DC
162. Relays, General Purpose (Balanced Armature)
163. Relays, Sensitive (Balanced Armature)
164. Relays, Dry Reed
165. Relays, Thermal Bi-metal
166. Relays, Magnetic Latching, (Balanced Armature) Contactor, High Current
167. Relays, Contactor, High Current (Solenoid)
168. Relays, Solid State, All
169. Switches, Dual In-line Package
170. Switches, Limit
171. Switches, Microwave
172. Switches, Pushbutton
173. Switches, Reed
174. Switches, Rocker
175. Switches, Rotary
176. Switches, Sensitive
177. Switches, Thermal
178. Switches, Thumbwheel
179. Switches, Toggle
180. Switches, Circuit Breaker, All
181. Connectors, Circular
182. Connectors, PCB Card Edge
183. Connectors, Hexagonal
184. Connectors, Rack and Panel
185. Connectors, Rectangular
186. Connectors, RF Coaxial (SMA, TNC)
187. Connectors, Telephone
188. Connectors, IC Sockets DIP, SIP, PGA
189. Circuit Boards, Plated Through Hole Technology
190. Circuit Boards, Surface Mount Technology
191. Single Connections, Hand Solder, without wrapping
192. Single Connections, Hand Solder, with wrapping
193. Single Connections, Crimp
194. Single Connections, Weld
195. Single Connections, Solderless Wrap
196. Single Connections, Clip Termination
197. Single Connections, Reflow Solder
198. Single Connections, Spring Contact
199. Single Connections, Terminal Block/Board
200. Meters, DC Ammeter or Voltmeter, MIL-M-10304
201. Meters, AC Ammeter or Voltmeter, MIL-M-10304
202. Crystal Units, Quartz, MIL-C-3098
203. Lamps, Incandescent, AC
204. Lamps, Incandescent, DC
205. Electronic Filters, Ceramic-Ferrite, MIL-F-15733
206. Electronic Filters, Discrete Inductor-Capacitor (L-C) Components, MIL-F-15733
207. Electronic Filters, Discrete Inductor-Capacitor (L-C) and Crystal Components, MIL-F-18327
208. Fuses

Notes, suggested categorization:
A/D converter: use a more complex linear microcircuit, #22 or #23
Mixer diode: #71
Silicon controlled rectifier: #75
Bipolar transistor: #76, #77 or #83
Attenuator: #98
Encoder: #158





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References:

  1. MIL-HDBK-217F, Notice 2, 28 Feb 1995, Reliability Prediction of Electronic Equipment, parts count section only or complete document from DoD assistdocs.com
  2. DigiKey Electronics (component part number search)
  3. ANSI/VITA 51.1-2013 (R2018), Reliability Prediction MIL-HDBK-217 Subsidiary Standard
  4. Frequently Asked Questions on ANSI/VITA 51.1-2008 (R2013) Rel Pred MIL-HDBK-217 Sub Spec
  5. O'Connor, Patrick, D. T., Practical Reliability Engineering.
  6. Bazovsky, Igor, Reliability Theory and Practice.
  7. Chandler, Gregory; Denson, William K.; Rossi, Michael J.; Wanner, Richard Nonelectronic Parts Reliability Data - NPRD-91.