prEN 4915-010

SLOVENSKI STANDARD
01-januar-2026
Aeronavtika - Hermetično zaprti releji 2PDT, 4PDT in 6PDT, 10 AMP - 10. del:
Standard za proizvod
Aerospace series - Hermetically sealed relays 2PDT, 4PDT and 6PDT, 10 AMP - Part
010: Product standard
Luft- und Raumfahrt - Hermetisch abgedichtete Relais, zwei-, vier- und sechspolige
Wechselschalter, 10 A - Teil 010: Produktnorm
Série aérospatiale - Relais hermétiques 2PDT, 4PDT and 6PDT, 10 AMP - Partie 010 :
Standard produit
Ta slovenski standard je istoveten z: prEN 4915-010
ICS:
29.120.70 Releji Relays
49.060 Letalska in vesoljska Aerospace electric
električna oprema in sistemi equipment and systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2025
ICS
English Version
Aerospace series - Hermetically sealed relays 2PDT, 4PDT
and 6PDT, 10 AMP - Part 010: Product standard
Série aérospatiale - Relais hermétiques 2PDT, 4PDT Luft- und Raumfahrt - Hermetisch dichte relais 2PDT,
and 6PDT, 10 AMP - Partie 010 : Standard produit 4PDT und 6PDT, 10 AMP - Teil 010: Produktnorm
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee ASD-
STAN.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 4915-010:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Symbols and abbreviated terms . 5
5 Required characteristics . 6
5.1 General. 6
5.2 Dimensions and electrical diagram of 2PDT relay . 6
5.2.1 Dimensions of 2PDT relay . 6
5.2.2 Electrical diagram for 2PDT DC coil with pins . 6
5.2.3 Electrical diagram for 2PDT AC coil 400 Hz and 50 to 400 Hz with pins . 7
5.3 Dimensions and electrical diagram of 4PDT relays . 7
5.3.1 Dimensions of 4PDT relays . 7
5.3.2 Electrical diagram for 4PDT DC coils with pins or hooks . 8
5.3.3 Diagram for 4PDT AC coil . 9
5.4 Dimensions and electrical diagram of 6PDT relay . 9
5.4.1 Dimensions of 4PDT relays . 9
5.4.2 Diagrams for 6PDT DC coils . 10
5.4.3 Diagram for 6PDT AC coil . 11
6 Required characteristics . 11
6.1 Contact performance . 11
6.2 Coil performance . 12
6.3 Environmental performance . 13
6.3.1 General. 13
6.3.2 Combined test: ambient temperature at 70 °C and vibrations . 14
6.3.3 Resistance to shocks . 14
6.4 Minimum distance between relays . 14
6.5 Pin performance . 15
6.6 Characteristics of the suppressor . 15
6.7 Other characteristics . 15
6.8 Mounting code . 16
6.9 Terminals variant code . 16
6.10 Coil code . 17
6.11 Quality level code . 17
7 Designation . 18
8 Marking . 18
9 Technical specification . 18
10 Dimensions. 19
10.1 Dimensions for 2PDT . 19
10.1.1 Mounting styles short form for 2PDT relay . 19
10.1.2 Terminals types short form for 2PDT relay . 20
10.2 Dimensions for 4PDT . 21
10.2.1 Mounting styles short form for 4PDT relay. 21
10.2.2 Terminal types short form for 4PDT relay . 22
10.3 Dimensions for 6PDT . 23
10.3.1 Mounting styles short form for 6PDT relay. 23
10.3.2 Terminal types short form for 6PDT relay . 24
11 Voltage transient curves (Table4 for § 5.3) . 25
12 Lightning indirect effects on relay power supply . 28
12.1.1 Damage testing . 28
12.1.2 Functional upset multiburst . 29
Annex A (normative) . 31
Annex B (normative) . 40
Annex C (normative) . 51
Bibliography . 61

European foreword
This document (prEN 4915-010:2025) has been prepared by ASD-STAN.
After enquiries and votes carried out in accordance with the rules of this Association, this document has
received the approval of the National Associations and the Official Services of the member countries of
ASD-STAN, prior to its presentation to CEN.
This document is currently submitted to the CEN Enquiry.
1 Scope
This document specifies characteristics for 10 A aerospace relays with the following variations of
mounting means (e.g. vertical, horizontal), terminal styles (e.g. hooks, pins for soldering, pins for
sockets) the associated finishing (e.g. tin plated, gold plated) and coil voltages (e.g.
6 VDC 12 VDC 28 VDC 48 VDC, 115 VAC) for relays with 2, 4 or 6 poles and with or without internal
suppressors or LIE protection.
The built-in suppressor limits the voltage transients resulting from the electrical power shut off.
The relay sockets are not described in this document.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 2349-001:2022, Aerospace series — Requirements and test procedures for switching devices
EN 4914-100:—, Aerospace series — Test procedures for electromechanical all-or-nothing relays
EN 4915-001, Aerospace series — Hermetically sealed relays 2PDT, 4PDT and 6PDT — Part 001:
Technical specification
MIL-DTL-45204 D, Gold plating, electrodeposited
EUROCAE ED-14D, System Engineering — Environmental Conditions and Test Procedures for Airborne
Equipment
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 4914-100, EN 4915-001 and
the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1
permanent magnet relay
magnet field of the permanent magnet that creates the NO/NC state
4 Symbols and abbreviated terms
For the purposes of this document, the following symbols and abbreviations apply:
2PDT two poles double throw
DPDT dual pole double throw
Under development. Stage at the time of preparation: prEN 4914-100:2026
Under development. Stage at the time of preparation: prEN 4915-001:2026
Published by Department of Defense (DoD), available at: https://assist.dla.mil/online/start/
4PDT four poles double throw
6PDT six poles double throw
LIE lightning indirect effect
5 Required characteristics
5.1 General
Dimensions and tolerances are given in millimetres and apply after surface treatment.
5.2 Dimensions and electrical diagram of 2PDT relay
5.2.1 Dimensions of 2PDT relay
Dimensions of 2PDT relays shall be in accordance with Annex A.
5.2.2 Electrical diagram for 2PDT DC coil with pins

NOTE The view is from connection side; relay is unpowered.
Figure 1 — Diagram for 2PDT DC coil relay regular or suppressed, or with LIE
5.2.3 Electrical diagram for 2PDT AC coil 400 Hz and 50 to 400 Hz with pins

For a relay with tin plated pins (for soldering on PCB) the fool proof pin should be round.
NOTE The view is from connection side; relay is unpowered.
Figure 2 — Diagram for 2PDT AC coil
5.3 Dimensions and electrical diagram of 4PDT relays
5.3.1 Dimensions of 4PDT relays
Dimensions of 4PDT relays shall be in accordance with Annex B.
5.3.2 Electrical diagram for 4PDT DC coils with pins or hooks

NOTE The view is from connection side; relay is unpowered.
Figure 3 — Diagram for 4PDT DC coil relay with pins or hooks, regular or suppressed, or with
LIE
5.3.3 Diagram for 4PDT AC coil

NOTE The view is from connection side; relay is unpowered.
Figure 4 — 4PDT 115 VAC with straight pins or solder hooks
5.4 Dimensions and electrical diagram of 6PDT relay
5.4.1 Dimensions of 4PDT relays
Dimensions of 6PDT relays shall be in accordance with Annex C.
5.4.2 Diagrams for 6PDT DC coils

NOTE The view is from connection side; relay is unpowered.
Figure 5 — Diagrams for 6PDT DC coil, regular or suppressed, or with LIE
5.4.3 Diagram for 6PDT AC coil

NOTE The view is from connection side; relay is unpowered.
Figure 6 — Diagram for 6PDT AC relay coil with straight pins or solder hooks
6 Required characteristics
6.1 Contact performance
Contact characteristics shall be in accordance with Table 1.
Table 1 — Contact characteristics
Switching capability (A)
(normally open or closed contacts)
Minimum
Type of load service life
26 VAC – 400 Hz
5 VAC – 115/200 VAC/
(cycles)
5 to 28 VDC (28 VAC and
400 Hz 360 – 800 Hz
26,5 VAC)
10 10 100 000
Resistive
2,5 2,5 400 000
— 6 (cos ϕ = 0,75) 100 000
Inductive
8 (cos ϕ = 0,75) 8 (cos ϕ = 0,75) 20 000
(L/R = 5 ms)
Switching capability (A)
(normally open or closed contacts)
Minimum
Type of load service life
26 VAC – 400 Hz
5 VAC – 115/200 VAC/
(cycles)
5 to 28 VDC (28 VAC and
400 Hz 360 – 800 Hz
26,5 VAC)
4 4
Motor 100 000
Inrush current I ≤ 24
2 2
Lamp 100 000
Inrush current I ≤ 24
10 mA 10 mA
Min. current on new
400 000
relay
—
Resistive overload as
per EN 4914-100:—,
§ 5.6.3
40 40 50
Make Carry and
Break
NOTE Lamp minimum life cycle is not to be demonstrated (see EN 4914-100).
6.2 Coil performance
Coil characteristics and operating voltage limits shall be in accordance with Table 2.
Table 2 — Coil characteristics and operating voltage limits
Nominal voltage 28 VDC 115 VAC/(360 – 800) Hz
Maximum voltage 32,5 VDC 130 VAC
b a b a
Energizing voltage C.D (VDC) C.E (VDC) C.D (VAC) C.E (VAC)
EN 2349-001:2022 § 5.5.12
+ 125 °C 18 19,8 90 96
+ 85 °C 16 17,8 83 88
EN 2349-001:2022 § 5.5.1
+ 23 °C 13,5 — 70 —
Energizing voltage EN 2349-001:2022 § 5.5.13
(low temperature)
Coil resistance 2PDT: 320 Ω
(tol: ± 10 %) 4PDT: 290 Ω
6PDT: 210 Ω
Coil maximum  40 mA at 400 Hz
consumption  40 mA at 800 Hz
Not applicable in AC
De-energizing voltage EN 2349-001:2022 § 5.5.2
(−55 °C to +125 °C) ≥ 1,5 VDC ≥ 5 VAC
Energizing voltage EN 2349-001:2022 § 5.5.2
(−55 °C to +125 °C) ≥ 7 VDC ≥ 30 VAC
Closing time EN 2349-001:2022 § 5.5.3
(including bounce) 2PDT ≤ 10 ms ≤ 20 ms
4PDT ≤ 15 ms
6PDT ≤ 15 ms
Opening time EN 2349-001:2022 § 5.5.4
(including bounce) 2PDT ≤ 10 ms ≤ 50 ms
4PDT ≤ 15 ms
6PDT ≤ 15 ms
Bounce time EN 2349-001:2022 § 5.5.5
2PDT 2 ms 2PDT 1 ms max.
4PDT  4PDT
6PDT  6PDT (N.A.)
Network transients on Apply procedure as described in EUROCAE ED-14D DO-160 Section 16
relay power supply
As per Figure 2 § 10 As per Figure 1 § 10
Network Apply procedure as described in EUROCAE ED-14D DO-160 Section 17
subtransients on relay
As per Figure 3 C § 10 As per Figure 3 A § 10
power supply
Lightning indirect Damage testing: according to § 11 (Category: Power Supply)
effects on relay power
Long Wave (form 4): Pin Injection Test
c
supply
Short Wave (form 2) and Oscillatory Wave (form 3): Cable Group Injection
Test
Functional Upset testing (Multiple Stroke and Pulse): according to § 11
(Category: Power Supply)
a
Coil energized during thermal stabilization.
b
Coil de-energized during thermal stabilization.
c
Compliance to LIE is given by a relay with LIE protection.
6.3 Environmental performance
6.3.1 General
Environmental performance shall be in accordance with Table 3.
Table 3 — Environmental performance
Tests Before endurance After endurance
a
Insulation resistance (M Ω) EN 2349-001:2022 § 5.5.6

100 min. 50 min.
Dielectric strength (Vrms; 50 Hz) EN 2349-001:2022 § 5.5.7

2PDT 4PDT 6PDT 2PDT 4PDT 6PDT
1) Coil/box 1 000 1 000
b
2) Coil/contacts 1 250 1 000
b
3) Between open contacts 1 250 1 000
b
4) Contacts/box 1 250 1 000
b
5) Between 2 contact stages 1 250  1 000
Altitude 25 000 m (Between all 350 250
contacts and box)
Voltage drop at In (mV) EN 2349-001:2022 § 5.5.8
150 50 175 150
Circuit-breaker compatibility Resistive loads (A) Maximum duration
EN 2349-001:2022 § 3.6.5
10 A rating 15 1 h
(Size 16 cable to be used 50 5 s
minimum 3 feet of wire) 100 1,2 s

250 0,2 s
350 0,1 s
a
Measurement points identical to those used in the dielectric strength test.
b
In the 2 positions: coil energized and de-energized
6.3.2 Combined test: ambient temperature at 70 °C and vibrations
Vibrations and ambient temperature during combined test shall be in accordance with the following:
Sinusoidal: 20 g-PK, according to EN 4915-001.
Random: 23,91 Grms, according to EN 4915-001.
6.3.3 Resistance to shocks
Resistance to shocks shall be in accordance with the following:
Shock: 100 g-PK, according to EN 4915-001.
6.4 Minimum distance between relays
The magnetic field generated by one relay could affect the performance of another relay when the
below minimum distance between relays is not respected. If the relays are mounted adjacent to each
other, it is advisable to alternate direction of magnetic path on every other unit and to keep a 1,6 mm
space between relays (see Figure 7, A). Or when mounted in the same direction, separate each relay
from the other by 3,2 mm (Figure 7, B). If two or more rows of relays are installed, allow clearance of
3,2 mm between rows, (Figure 7, C and D). Provide 4,8 mm space between relays if used in opposition
(Figure 7, E).
This figure is applicable to 2PDT 4PDT and 6PDT.
Figure 7 — Minimum distance between relays
6.5 Pin performance
Pin performance shall be in accordance with Table 4.
Table 4 — Pin performance
Tests Procedures Results
Visual check EN 4914-100:— § 4.8.1 —
Dimension EN 4914-100:— § 4.8.1 See dimensional characteristics
2PDT 4PDT 6PDT
Pin strength EN 4914-100:— § 4.XX
(45 ± 4,5) N
6.6 Characteristics of the suppressor
Diodes shall have a peak reverse voltage of 600 VDC minimum.
Back EMF shall be limited to - 42 VDC for 6 VDC, 12 VDC, 28 VDC and 48 VDC.
6.7 Other characteristics
Other characteristics shall be in accordance with Table 5.
Table 5 — Other characteristics
Tightening torque 0,45 Nm max (recommended)
Contact pins Gold-plated (1,27 µm min.) as per MIL-DTL-45204 D type II
Polarization pins (if necessary) Tin-plated or nickel-plated
Non-magnetic CRES.
Screws
When the relay is connected to the base, the captive screws shall
retract into their housing.
Lockwashers Rust-proof and non-magnetic
Interface seal Silicone, Shore hardness 30 to 45
Operating temperature - 55 °C to + 125 °C
Service Continuous
Supply nominal voltage Refer to coil table
Normal environmental test
EN 2349-001:2022 § 5.1.1
conditions
–6 3
< 1 × 10 atm cm /s of air
Tightness to Air
According to test method: EN 4914-100:— § 4.10.3 Seal
Back EMF (transient voltage) 42 VDC maximum
6.8 Mounting code
Mounting code shall be marked in accordance with Table 6.
Table 6 — Mounting code
Code Mounting description
A Not used
B Vertical flange mount Captive screws metric (ISO)
C Vertical flange mount Captive screws imperial (UNC)
D Raised Vertical flange mount flat hole
J Horizontal flange mount flat hole
K Vertical flange mount flat hole with spacer
6.9 Terminals variant code
Terminal variant code shall be marked in accordance with Table 7.
Table 7 — Terminals variant code
Variant code Terminal description
1 Straight pins tin plated
2 Solder hooks tin plated
3 Not used
Variant code Terminal description
4 Straight pins gold plated
5 Not used
6 Not used
7 90° angled tin plated pin
8 and 9 Straight short pins tin plated
6.10 Coil code
Coil code shall be marked in accordance with Table 8.
Table 8 — Coil code
Code Coil voltage Suppressor/LIE
A 6 VDC no protection
B 12 VDC no protection
C 28 VDC no protection
D 48 VDC no protection
E 6 VDC Suppressed
F 12 VDC Suppressed
G 28 VDC Suppressed
H 48 VDC Suppressed
J
K 6 VDC LIE
L 12 VDC LIE
M 28 VDC LIE
N 48 VDC LIE
R 115 VAC 400 Hz
S
T 115 VAC 50/60 400 Hz
6.11 Quality level code
Quality level code shall be marked in accordance with Table 9.
Table 9 — Quality level code
Code Screening FF/H
L Low-Light
N none
7 Designation
EXAMPLE
8 Marking
Unless otherwise specified by contract, marking shall include:
— the manufacturer’s part number;
— the manufacturer’s name or trademark;
— the date of manufacture (year, week);
— the identification defined in chapter 6;
— the circuit diagram of the relay, including th
...