SERIES 4310
Ambient Temperature-Compensated Miniature Circuit Breaker
The space-qualified product utilizes the same
design as the 4310.
Miniature Size — High Performance
High Interrupting Capacity:
Interrupts 6,000-ampere fault at 28V,
DC; up to 3,500-ampere fault at 120V,
400 Hz., AC (ampere rating dependent)
Temperature-Compensated:
Ambient-temperature-compensated
from -55°C to +121°C
Vibration Resistance: Vibration resis-
tance and mechanical life exceed mil
specs — including random vibration
Qualified: To MS3320 of Mil-C-5809.
Meets performance specification of
MS14105 of MIL-C-5809
The MP lightweight, single-phase
circuit breaker, Series 4310, allows high
density packaging for all aircraft and
aerospace needs.
The 4310 series reflects the latest
advancements in circuit breaker design...
plus the proven features of previous MP
models (e.g., self-wiping contacts).
T ight tolerances in design and stringent
manufacturing standards are key factors
in the reliable operation of the 4310
under severe environmental conditions
of high temperature, high humidity,
extreme vibration, and shock. It is also
fungus- and corrosion-proof. Calibration
integrity is maintained through wide
variations in ambient temperature and
altitude, making this circuit breaker
ideal for applications where tempera-
ture is not controlled.
Multiple Options: This series is avail-
able in many optional configurations.
It is presently being manufactured
with a 7/16, 15/32, and metric
mounting sleeves.
Many versions of different terminals,
barriers, and hardware are current
production items.
Several different actuator options pro-
vide our customers with additional
flexibility in their designs.
Performance Data
Interrupting Capacity*: 1 through 25 amp: 6,000 amps at 28V, DC. 1 amp: 3,500 amps at 120V, 400 Hz., AC.
1 1/2 through 20 amps: 2,800 amps at 120V, 400 Hz., AC.
25 amps: 2,000 amps at 120V, 400 Hz., AC
Endurance: At 120V, 400 Hz., AC or at 28V, DC: inductive load—2,500 cycles; resistive load—5,000 cycles;
mechanical cycling, no load—20,000 cycles
Overload Cycling: Minimum of 100 cycles at 200% rated current
Dielectric Strength: At sea level, 25°C 1,500V, AC. At 70,000 ft. 121°C 500V, AC
Insulation Resistance: Not less than 100 megohms at 500V, DC
Voltage Drop: Varies with rating (see “Ordering Information”)
Vibration*: Meets specification MIL. STD. 202, Method 204, Condition A-10G., 10-500 Hz.
MS “V” type,(4310-019) meets Condition B, 15G, 10-2,000 Hz. and Condition C 10G, 10-2,000 Hz.
Shock*: Exceeds 50 g’s, 11 Milli-sec (half-sine pulse) MIL STD. 202, Method 213 T est A
Acceleration: Exceeds 10 g’s
Weight: 25 grams (.055 lbs.)
*Variations of these cir cuit breakers are capable of exceeding the standard Mil specification for endurance vibration, shock, and
Interrupting capacity. Consult the factory for more information.
MS3320
Dimensions
Mil. Spec Part No. A* Max. B* Min.
MS3320 4310-001 0.750 0.470
MS3320L 4310-005 1.125 0.845
MS3320V 4310-019 0.750 0.470
MS3320VL 4310-024 1.125 0.845
Min. Panel Thickness .025
Max. Panel Thickness .100
Overload Calibration Data
Specification @ 25°C @ +121°C @ -55°C Test Time
Table Parameters
MIN MAX MIN MAX MIN MAX
Must Hold 115 100 115 % For 1 Hour
Must Trip 138 138 160 % Within 1 Hour
200% Overload 5.00 20.00 1.500 13.00 7.00 40.00 Seconds
500% Overload 0.50 2.00 0.150 1.10 0.50 3.00 Seconds
1000% Overload 0.12 0.53 0.035 0.30 0.16 0.80 Seconds
Trip curves available – consult factory
Ordering Information
Part Numbers Long Long Button &
Ampere Button High High Vibration
MS No. Rating Voltage Standard (See Dimension A/B) Vibration (See Dimension A/B)
Example (XX) Drop Max.* MS3320-(XX) MS3320-(XX)L MS3320-(XX)V MS3320-(XX)VL
MS Approved 1 1.10 4310-001-1 4310-005-1 4310-019-1 4310-024-1
2 0.75 4310-001-2 4310-005-2 4310-019-2 4310-024-2
2 1/2 0.70 4310-001-205 4310-005-205 4310-019-205 4310-024-205
3 0.55 4310-001-3 4310-005-3 4310-019-3 4310-024-3
4 0.45 4310-001-4 4310-005-4 4310-019-4 4310-024-4
5 0.35 4310-001-5 4310-005-5 4310-019-5 4310-024-5
7 1/2 0.30 4310-001-705 4310-005-705 4310-019-705 4310-024-705
10 0.28 4310-001-10 4310-005-10 4310-019-10 4310-024-10
15 0.25 4310-001-15 4310-005-15 4310-019-15 4310-024-15
20 0.25 4310-001-20 4310-005-20 4310-019-20 4310-024-20
Non MS 1 1/2 0.80 4310-001-105 4310-005-105 4310-019-105 4310-024-105
Approved 25 0.20 4310-001-25 4310-005-25 4310-019-25 4310-024-25
*At rated nominal current.
For other amp ratings, consult factory .
©Copyright 1995, Mechanical Products, Inc. All Rights Reserved.
Mechanical Products, Inc.
1824 River Street
P.O. Box 729
Jackson, MI 49204
(517) 782-0391
FAX (517) 782-2810
SERIES 4310Ambient Temperature-
Compensated Miniature
Circuit Breaker
The space-qualified product utilizes the same design as the 4310. The MP lightweight, single-phase circuit breaker, Series 4310,
allows high density packaging for all aircraft and aerospace needs. Calibration integrity is maintained through wide variations in
ambient temperature and altitude, making this circuit breaker ideal for applications where temperature is not controlled.
Mechanical Products, Inc.
1824 River Street, P.O. Box 729, Jackson, MI 49204
(517) 782-0391, F AX (517) 782-2810
PERCENTAGE OF CURCUIT BREAKER’S RA TED CURRENT
TIME TO OPEN (TRIP) IN SECONDS
Overload Calibration Data
Specification @ 25°C @ +121°C @ -55°C Test Time
Table Parameters
MIN MAX MIN MAX MIN MAX
Must Hold 115 100 115 % For 1 Hour
Must Trip 138 138 160 % Within 1 Hour
200% Overload 5.00 20.00 1.500 13.00 7.00 40.00 Seconds
500% Overload 0.50 2.00 0.150 1.10 0.50 3.00 Seconds
1000% Overload 0.12 0.53 0.035 0.30 0.16 0.60 Seconds
(MS330 OF MIL–C–5809)
SERIES 431 0
Mechanical Products, Inc.
1824 River Street, P.O. Box 729, Jackson, MI 49204
(517) 782-0391, F AX (517) 782-2810
Dimensions
Dimensions
Mil. Spec Part No. A* Max. B* Min.
MS3320 4310-001 0.750 0.470
MS3320L 4310-005 1.125 0.845
MS3320V 4310-019 0.750 0.470
MS3320VL 4310-024 1.125 0.845
Min. Panel Thickness .025
Max. Panel Thickness .100
©Copyright 1995, Mechanical Products, Inc. All Rights Reserved.