MEPIA

www.vishay.com

Vishay Sfernice

Revision: 08-Feb-2019

2

Document Number: 53079

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

TECHNOLOGY

The MEPIA active area (heating zone) will be impregnated by the user with a primary pyrotechnic material (usually wet primer

followed by drying) in such way to ensure an intimate contact for an optimum heat transfer of thermal energy. Note that the

active area of MEPIA shall not be put in direct contact with explosive powder as grain size will not ensure intimate contact and

will induce non reproducible and non reliable performances.

The two main characteristics of a MEPIA resistor are their “All Fire” (AF) and “No Fire” (NF) performances:

- “All Fire” (AF) represents the command pulse (generally with capacitance discharge) where the major amount of the dissipated

energy will be transferred to the primer to generate the ignition

- “No Fire” (NF) represents the immunity of the resistor with primer to the environmental electro-magnetic pollution and electric

continuity test, where the major amount of the dissipated energy will be transferred to the substrate to ensure no ignition

PERFORMANCES

TESTS

SPEC.

CONDITIONS

SPEC.

REQUIREMENTS

TYPICAL

PERFORMANCES

High temperature

exposure

MIL-STD-202

Method 108

T = 125 °C / 1000 h

± 2 % ± 0.05



± 1.5 %

Temperature cycling

JESD22

Method JA-104

-55 °C / 125 °C

1000 cycles

± 5 % ± 0.05



± 1.5 %

Biased humidity

MIL-STD-202

Method 103

85 °C / 85 % RH

1000 h

± 2 % ± 0.05



± 1.2 %

Operational life

MIL-STD-202

Method 108

T = 125°C / 1000 h

P = 51 mW

(P based on no fire

conditions)

± 2 % ± 0.05



± 1.6 %

Mechanical shock

MIL-STD-202

Method 213

100 G

± 2 % ± 0.05



± 0

.2 %

Vibration

MIL-STD-202

Method 204

2000 Hz / 5G

10 cycles

± 2 % ± 0.05



± 0

.2 %

Solderability

MIL-STD-202

Method 210

Cond. D

T = 245 °C / 3 s

No degradation

of termination side

Visual inspection:

conform to spec.

ESD

AEC-Q200-002

Air discharge

U = 25 kV / 1 time

± 5 % ± 0.05



± 1.5 %

Reflow

According to

IPC-610 / vers. E

§ 8.3.2.6 / Fig. 8.35

Sn96.6Ag3Cu0.5

soldering

25 % of the height of the

termination

Visual inspection:

conform to spec.

Electrical

characterization

User spec.

-55°C / 125°C

alumina board

± 200 ppm/°C

± 160 ppm/°C

Electrical

characterization

User spec.

-55°C / 125°C

FR4 board

± 200 ppm/°C

± 170 ppm/°C

Board flex

AEC-Q200-005

60 s / 2 mm

± 2 % ± 0.05



± 0

.2 %

Shear test

AEC-Q200-006

0.5 N / 60 s

± 2 % ± 0.05



± 0

.8 %

RANGE OF IGNITION PERFORMANCES

MODEL

“NO FIRE”

CURRENT

A

“NO FIRE”

DURATION

s

“ALL FIRE”

CURRENT

A

IGNITION

TIME

ms

“ALL FIRE”

ENERGY

μJ

MEPIA (SMD)

0.5 to 1.2

2 to 10

Down to 1

Down to 0.25

Down to 500