38999 Series III-Type EMI Filter Connectors, Marine Grade
C or π filter per contact · up to 55 dB · marine grade
38999 Series I-Type Bayonet EMI Filter Connectors, Marine Grade
Bayonet · C or π filter per contact · marine grade
The bayonet Series I-type version of our filter connectors: every contact has a C or π planar low-pass filter, and the connector keeps the fast bayonet coupling and mating interface of GJB599 Series I. Marine-grade construction withstands acid salt spray, acid atmosphere and mould.
- Filter circuits
- C or π
- Capacitance
- 75 pF to 100 nF
- Insertion loss
- Up to 55 dB at 100 MHz
- Coupling
- Bayonet
- Temperature
- −55 to +125 °C
Key features
- Each contact is a complete low-pass filter — C or π circuit
- Replaces the standard connector without changing wiring; filtering and shielding in one part
- Different filter values mixed in one connector
- Smaller and lighter than filtering outside the connector
- Marine grade: 240 h acid salt spray, acid atmosphere and 84-day mould
- Aluminum (olive-drab cadmium) or titanium shells
- Bayonet coupling; scoop-proof, keyed
Specifications
| Parameter | Value | Condition |
|---|---|---|
| Insulation resistance | ≥ 1000 MΩ | 100 VDC |
| Dielectric withstanding voltage | 500 VDC, 5 s | |
| Working voltage classes | 50, 100, 200 or 400 VDC | |
| Filter circuits | C or π, planar array; mixed values in one connector |
| Parameter | Value | Condition |
|---|---|---|
| Durability | 500 mating cycles | |
| Operating temperature | −55 to +125 °C | |
| Vibration | 10–2000 Hz, 20 g | |
| Shock | 100 g | |
| Acid salt spray | 240 h (5 × 48 h), pH 3.5 ± 0.5 | GJB 150.11A |
| Acid atmosphere | 4 cycles, pH 3.5 ± 0.5 | GJB 150.28 |
| Mould | 84 days, grade 1 or better | GJB 150.10A |
38999 Series I type — Mating interface of GJB599 Series I.
Values not listed above — for example vibration level, leak rate or other environmental tests — can be tested to your requirements, including third-party testing. Specifications are subject to change; contact us for the current datasheet.
Filter values
Planar filter arrays; minimum insertion loss measured at 25 °C, no load, 50 Ω system. Actual values in use may differ.
| Circuit | Code | Capacitance | 3 dB cut-off | 1 MHz | 3 MHz | 10 MHz | 30 MHz | 100 MHz |
|---|---|---|---|---|---|---|---|---|
| C | 750 | 75 pF | 70 MHz | 1 dB | ||||
| C | 151 | 150 pF | 35 MHz | 3 dB | ||||
| C | 271 | 270 pF | 20 MHz | 3 dB | ||||
| C | 471 | 470 pF | 12 MHz | 3 dB | 10 dB | |||
| C | 102 | 1000 pF | 5.1 MHz | 6 dB | 20 dB | |||
| C | 252 | 2500 pF | 3 MHz | 1 dB | 6 dB | 12 dB | 22 dB | |
| C | 332 | 3300 pF | 2.5 MHz | 3 dB | 13 dB | 20 dB | 30 dB | |
| C | 472 | 4700 pF | 2 MHz | 3 dB | 13 dB | 20 dB | 30 dB | |
| C | 682 | 6800 pF | 1.5 MHz | 2 dB | 9 dB | 19 dB | 25 dB | 35 dB |
| C | 103 | 10000 pF | 1 MHz | 2 dB | 9 dB | 19 dB | 25 dB | 35 dB |
| C | 104 | 100000 pF | 0.1 MHz | 5 dB | 12 dB | 22 dB | 30 dB | 40 dB |
| π | 471 | 470 pF | 12 MHz | 4 dB | 12 dB | |||
| π | 102 | 1000 pF | 3.2 MHz | 7 dB | 24 dB | |||
| π | 252 | 2500 pF | 1.3 MHz | 1 dB | 6 dB | 16 dB | 25 dB | |
| π | 332 | 3300 pF | 1.1 MHz | 2 dB | 8 dB | 20 dB | 41 dB | |
| π | 472 | 4700 pF | 0.8 MHz | 2 dB | 8 dB | 20 dB | 41 dB | |
| π | 682 | 6800 pF | 1.5 MHz | 2 dB | 5 dB | 13 dB | 30 dB | 50 dB |
| π | 103 | 10000 pF | 1 MHz | 2 dB | 5 dB | 13 dB | 30 dB | 50 dB |
| π | 104 | 100000 pF | 0.1 MHz | 5 dB | 10 dB | 25 dB | 30 dB | 55 dB |
Shell materials and finishes
| Code | Shell material | Finish | Shell conductivity | EMI shielding | Temperature | Salt spray |
|---|---|---|---|---|---|---|
| B | Aluminum alloy | Olive-drab cadmium | — | EMI shielded | −55 to +125 °C | 240 h acid |
| TA | Titanium alloy | None | — | EMI shielded | −55 to +125 °C | 240 h acid |
How to order
Series I base part number + filter code
Example: … BL1103H — Planar filter, C circuit, 10000 pF (+100/0 %)
| Code segment | Options |
|---|---|
| Circuit | |
| Capacitance | |
| Capacitance tolerance | |
| Working voltage |
DC filter connectors must not be used on AC supply lines.
Tell us about surge voltages, inductive loads (relays, motors) and any conducted-susceptibility test requirements before selection.
Do not test filter connectors with a megger or AC hipot above the rated values.
Typical applications
- Shipboard and offshore electronics
- Communication equipment
- Power electronics
- Industrial controls
Frequently asked questions
Series I or Series III filter connector?
Match the coupling of your mating plug: bayonet Series I or threaded Series III. Filter values are the same for both.
Selection guides
From sample to production
Send your requirement
Part number, drawing, pin-out or a short description of your application.
Configuration and quote
Our engineers match the configuration and reply with a drawing and quotation.
Samples
Samples are made to your order. Third-party testing to your specification is available on request.
Your approval
You test the samples in your own equipment and approve them.
Series production
Production follows the approved sample configuration.
Need a quote or a drawing?
Send your part number, pin-out or drawing. An engineer will reply by email.
Related series
GJB599 Series I Bayonet Circular Connectors (38999 Series I Type)
38999 Series I type · bayonet coupling · 127 insert arrangements