Materials and Finishes
| Insulator: | Glass-filled polyester per MIL-M-24519, UL 94V-0 blue color |
|---|---|
| Contacts: | Precision machined brass alloy |
| Contact Plating: | |
| Signal: | Gold flash over nickel and gold 0.000050 (1.27 µ) over nickel plate. Other finishes available upon request. |
| Power | Gold flash over nickel. Other finishes available upon request. |
| Shells: | Steel or brass with tin plate; zinc with chromate seal, stainless steel passivated. Other materials and finishes available upon request |
| Brackets: | Copper alloy or steel with zinc plate and chromate seal or tin plate; phosphor bronze with tin plate; stainless steel, passivated. |
| Push-On Fasteners: | Beryllium copper with tin plate |
| Jackscrew Systems: | Brass or steel with zinc plate and chromate seal or clear zinc plate or tin plate; stainless steel, passivated. |
| Hoods: | Glass filled polyester, UL 94V-0, blue color |
| Environmental Initiatives | |
Electrical Characteristics
| Size 20 Contacts: | |
|---|---|
| Contact current rating: | 7.5 amperes nominal |
| Initial contact resistance: | 0.008 ohms maximum |
| Proof voltage: | 1000 V r.m.s. |
| Size 8 Power Contacts: | |
| Contact current rating: | QB7W2 MTCA.0 48V: 70 amperes nominal. See Temperature Rise Curves QB9W4 MTCA.0 24V: 85 amperes nominal. MTCA.0 R1.0 specification requires each power contact in the 24V input connector to carry 49 amps minimum at a 30° C temperature rise prior to derating. The QB9W4 connector meets this requirement. QBH5W1/ QBH15W4 MTCA.1 12V: 75 amperes nominal. MTCA.1 R1.0 specification requires each power contact in the 12V input connector to carry 50 amps minimum at a 30° C temperature rise prior to derating. The QBH5W5 and QBH15W4 connectors meets this requirement. |
| Initial contact resistance: | 0.0005 ohms max. per IEC 512-2, Test 2b |
| Proof voltage: | 1000 V r.m.s. |
| Connector: | |
| Insulation resistance: | 5 G ohms |
| Working voltage: | 300 V r.m.s. |
| Clearance/creepage distance: | Between power contacts: 0.06 inch (1.5 mm), minimum Between signal contacts: 0.02 inch (0.4 mm), minimum Between power and signal contacts: 0.06 inch (1.5 mm), minimum Between power contacts and shelf GND: 0.06 inch (1.5 mm), minimum Between signal contacts and shelf GND: 0.06 inch (1.5 mm), minimum |
Mechanical Characteristics
| Signal contacts, fixed: | Size 20 contacts, male - 0.040 inch [1.02 mm] mating diameter. Female contacts are PosiBand closed entry design. |
|---|---|
| Power contacts, fixed: | Size 8 contacts, male - 0.142 inch [3.61 mm] mating diameter. Female contacts are closed entry "Large Surface Area" design. |
| Contact retention in insulator: | Signal: 9 lbs (40N) Power: 22 lbs (98N) |
| Locking systems: | Jackscrews |
| Mechanical Operations: | 200 operations, minimum |
Feeds