Custom EMI Filters
For over three decades, Texas Spectrum Electronics (TSE) has provided the military, aerospace and industrial communities with Electromagnetic Interference (EMI) products. TSE has become recognized as a manufacturer of quality EMI/RFI filters, feed-thru capacitors and other related components helping to solve Electromagnetic Compatibility (EMC) problems.
Applications
Texas Spectrum's engineers are experts at designing custom filters to solve EMI problems. Our engineers can help your systems meet MIL-STD-461. TSE filters are used on military and commercial aircraft, armored vehicles, helicopters and communication systems. TSE filters are manufactured to the general requirements of MIL-PRF-15733.
General Specifications
- Manufactured to general requirements of MIL-PRF-15733
- Hermetically sealed
- Similar to TSE filters qualified for MIL applications
- Similar to TSE filters used for MIL-STD-461
Voltage Ratings: 50VDC & 115 VAC, 400Hz (Higher ratings available).
Current Ratings: 2.5 to 15 amps (Higher ratings available).
Temperature Range: -55°C to +125°C.
Voltage Drop: 1% of rating.
Insertion Loss: MIL-STD-220B and real ZS, ZL.
Insulation Resistance: 1000 Megohms Min.
'L' Section Filers (All others available).
Tested to MIL-PRF-15733 and MIL-STD-202
MIL qualified connectors. Others available such as MIL-C-38999
Solder lug terminals. Threaded post and others available.
Inserts are blind, internal threads, welded for maximum strength.
Custom Configurations
to 300 Amps and 3000 Volts.
Customer modifications can be quickly incorporated.
Case Configuration

Case Material is steel per QQ-S-763. The finish is tin plate & fused per ASTM B545-97.
| Case style | A | B | C | D | E | Insert |
| I | 2.50 | 1.50 | 1.62 | 2.060 | 1.080 | 6-32 |
| II | 3.25 | 2.00 | 2.63 | 2.810 | 2.190 | 6-32 |
| III | 3.75 | 2.12 | 3.00 | 3.250 | 2.500 | 8-32 |
| IV | 3.75 | 2.12 | 3.62 | 3.250 | 3.120 | 8-32 |
Special Notes
NOTE 1:Terminal is connected for 10 & 15 amp rating.
NOTE 2:Transient voltage suppressors available by adding “1” to part number. (Example: 3FS4172-21.)
NOTE 3:For AC Filters, neutral current rating is 25% of phase.
CUSTOM 50VDC - 2FS4170

| PART NO. | CURRENT AMPS | CASE STYLE | INSERTION LOSS CURVE | CONNECTOR |
| 2FS4170-1 | 2.5 | I | 1 | MS3449H-14C-5PN |
| 2FS4170-2 | 5 | I | 2 | MS3449H-14C-5PN |
| 2FS4170-3 | 10 | II | 2 | MS3449H-14C-5PN |
| 2FS4170-4 | 15 | II | 3 | MS3449H-14C-5PN |
CUSTOM 115V, 400Hz SINGLE PHASE - 2FS4171

| PART NO. | CURRENT AMPS | CASE STYLE | INSERTION LOSS CURVE | CONNECTOR |
| 2FS4171-1 | 2.5 | I | 2 | MS3449H-14C-5PN |
| 2FS4171-2 | 5 | I | 4 | MS3449H-14C-5PN |
| 2FS4171-3 | 10 | II | 4 | MS3449H-14C-5PN |
| 2FS4171-4 | 15 | II | 5 | MS3449H-14C-5PN |
CUSTOM 115V, 400Hz THREE PHASE - 3FS4172

| PART NO. | CURRENT AMPS | CASE STYLE | INSERTION LOSS CURVE | CONNECTOR |
| 3FS 4172-1 | 2.5 | II | 2 | MS3449H-14C-5PN |
| 3FS 4172-2 | 5 | II | 4 | MS3449H-14C-5PN |
| 3FS 4172-3 | 10 | III | 4 | MS3449H-16C-8PN |
| 3FS 4172-4 | 15 | III | 5 | MS3449H-16C-8PN |
CUSTOM 115V, 400Hz THREE PHASE & NEUTRAL - 4FS4173

| PART NO. | CURRENT AMPS | CASE STYLE | INSERTION LOSS CURVE | CONNECTOR |
| 4FS 4173-1 | 2.5 | III | 2 | MS3449H-14C-5PN |
| 4FS 4173-2 | 5 | III | 4 | MS3449H-14C-5PN |
| 4FS 4173-3 | 10 | IV | 4 | MS3449H-16C-8PN |
| 4FS 4173-4 | 15 | IV | 5 | MS3449H-16C-8PN |