Attention: The information and recommendations described in this brochure cannot possibly cover every application of the products or variation of conditions under which the products are used. The recommendations herein are based on the manufacturer’s experience, research and testing. They are believed to be accurate, but no warranties are made, express or implied.

In addition, the specifications containedherein are all nominal which represent our current production. The products described may be subject to change. Please feel free to contact Ensign-Bickford Aerospace & Defense Company for verification. No Warranties or Liabilities: THE PRODUCTS DESCRIBED HEREIN are sold “AS IS” and without any warranty or guaranty, express, or implied, arising by law or otherwise including without limitation any warranty of merchantability or fitness for a particular purpose. Buyer and user agree further to release and discharge seller from any and all liabilities whatsoever arising out of the purchase or use of any product described herein whether or not such liability is occasioned by seller’s negligence or based upon strict products liability or upon principles of indemnity or contribution. Content©2018 Ensign-Bickford Aerospace & Defense Company, Simsbury, CT 06070, U.S.A.

ENSIGN-BICKFORD AEROSPACE & DEFENSE COMPANY640 HOPMEADOW STREET, P.O. BOX 429, SIMSBURY, CT 06070, USA www.EBA-D.com

Series 76 Electric Initiators

Electric Initiators are commonly used on missiles, launch vehicles, spacecraft, and other aerospace and defense platforms for the initiation of solid rocket motors and other propulsive elements, and actuation of mechanisms such as separation devices, cutters, pin pullers, or isolation valves. The Initiator takes an electrical input and provides work in the form of a pyrotechnic output.

Principle of Operation

The EBAD Series 76 family of initiators are 2, 3, or 4-pin, single or dual bridgewire, electrically activated initiators. Upon application of electrical current, heat is generated and transferred from an internal filament or bridgewire to the surrounding pyrotechnic material causing powder ignition and a rapid output of heat and gas pressure. The flame and hot particle output can be used to ignite downstream pyrotechnics or propellants contained in CAD/PAD devices. For smaller devices, the pressure output of the initiator is sufficient to directly actuate the device without a booster charge. When threaded into a Detonation Booster Assembly (DBA), the initiator is used to provide detonation impetus for stage and fairing separation and other detonation based events. Initiation will reliably occur when a minimum “All-Fire” current is delivered to the bridgewire. Similarly, the device will not be initiated when the current is maintained below the designated “No-Fire” requirement.

Key Features

• Rugged stainless-steel construction

• Standard electrical/mechanical interface

• Proven reliability

• Redundant or non-redundant circuit

• Wide operating temperature range

• Hermetically sealed

Applications

Series 76 Initiators are used in a wide variety of aerospace and defense applications including:

• Initiation of solid rocket motors and thrusters

• Actuation of separation mechanisms such as separation nuts, bolts, cutters, piston actuators, and other CAD/PAD devices

• Propulsion system isolation valve actuation

• Initiation of linear separation events (when coupled with a DBA)such as Linear Shaped Charges and Frangible Joints

Construction

Series 76 initiators feature a stainless steel body that houses all the critical elements of the initiator. The body has an internal glass-to-metal seal that allows for physical isolation of the input electrical connector pins from the output pyrotechnic event. The header design and construction allows for high pressure sealing capability during and after the pyrotechnic event. The time/pressure and caloric output is generated from a Zirconium Potassium Perchlorate (ZPP) and/or a Titanium Hydride Potassium Perchlorate (THPP) output charge. The initiator has elements that electrically isolate the bridgewire from the body and protects against ESD and other stray electrical energy between the pins and the header, and allow the initiator to pass critical Dielectric Strength and Insulation Resistance test environments. The entire assembly is hermetically sealed.

Qualification History

The Series 76-3 Initiator is fully qualified to MIL-DTL-23659 and MIL-HDBK-1512. The remainder of the Series 76 family is qualified by similarity to the Series 76-3.

www.EBA-D.com

Series 76 Initiators

pyrovalve with initiator

Series 76 Initiators

Mission Success

Ensign-Bickford Aerospace & Defense Company (EBAD) is dedicated to supporting our customers in the aerospace and defense industry through on-time delivery of innovative products that exceed expectations and assure mission success.

Electrical Properties

Insulation Resistance (Pin to Case) > 10MΩ (500VDC)Dielectric Strength (Pin to Case) < 500μA (200VAC)ESD Pin-to-Pin 25kV / 500pf / 5kΩ series resistorESD Pin-to-Case 25kV / 500pf / no series resistorBridgewire Resistance 1.0Ω +/- 0.1Ω

Performance Characteristics

All-Fire Current 3.5A, 10mS pulse (0.99 at 95%), 70°FNo-Fire Current 1A /1W for 5 minutes

Safe Test Current 10mAHermeticity < 1.0 x 10-6 std cc/sec HePressure Capability 15,000 psi

Mechanical Properties

Installation Torque 45 +/- 5 in-lbs (.375 - 24UNF-3A)70 +/- 5 in-lbs (.500 - 20 UNF-2A)120 +/- 10 in-lbs (.625 - 16UN-3A)

Pin Material Gold Plated Iron-Nickel alloyBody Material Stainless SteelSeal Glass-to-Metal

Qualification

Random Vibration 132.5 g RMS composite, 240 seconds per axisPyrotechnic Shock 20,000 g peak at 5,000 Hz, 5 shocks per axisOperational Temperature -80°F to 225°F

Cleared for Open Publication by the Defense Office of Prepublication and Security Review, Department of Defense 06/18/2018 18-S-1670 Cleared for Open Publication by the Defense Office of Prepublication and Security Review, Department of Defense 06/18/2018 18-S-1670

Qualification History

The Series 76-3 Initiator is fully qualified to MIL-DTL-23659 and MIL-HDBR-1512. The remainder of the Series 76 family is qualified by similarity to the Series 76-3.

Series 76 Initiators

Mission Success

Ensign-Bickford Aerospace & Defense Company (EBAD) is dedicated to supporting our customers in the aerospace and defense industry through on-time delivery of innovative products that exceed expectations and assure mission success.

www.EBA-D.com

Mechanical Interface Drawing

Circuit Diagram

Attention: The information and recommendations described in this brochure cannot possibly cover every application of the products or variation of conditions under which the products are used. The recommendations herein are based on the manufacturer’s experience, research and testing. They are believed to be accurate, but no warranties are made, express or implied.

In addition, the specifications containedherein are all nominal which represent our current production. The products described may be subject to change. Please feel free to contact Ensign-Bickford Aerospace & Defense Company for verification. No Warranties or Liabilities: THE PRODUCTS DESCRIBED HEREIN are sold “AS IS” and without any warranty or guaranty, express, or implied, arising by law or otherwise including without limitation any warranty of merchantability or fitness for a particular purpose. Buyer and user agree further to release and discharge seller from any and all liabilities whatsoever arising out of the purchase or use of any product described herein whether or not such liability is occasioned by seller’s negligence or based upon strict products liability or upon principles of indemnity or contribution. Content©2018 Ensign-Bickford Aerospace & Defense Company, Simsbury, CT 06070, U.S.A.

ENSIGN-BICKFORD AEROSPACE & DEFENSE COMPANY640 HOPMEADOW STREET, P.O. BOX 429, SIMSBURY, CT 06070, USA www.EBA-D.com

Series 76 Initiators

ELECTRICAL CHARACTERISTICS MECHANICAL CHARACTERISTICS PERFORMANCE

MODEL BRIDGEWIRES CIRCUITDIAGRAM

MATING CONNECTOR OUTPUT PORTTHREAD

WEIGHT DIM “A” DIM “B” DIM “C” PEAK PRESSURE

(10CC VOLUME, <10 MILLISECONDS)

GRAMS INCHES MAX

INCHES MAX

INCHESNOM

PSI

S76-3 2 i MS3116E8-4S 0.375-24 UNF-3A 12 0.910 0.335 0.562 925

S76-4 2 i MS3116E8-4S 0.375-24 UNF-3A 12 0.910 0.335 0.562 1600

S76-22 2 i MS3116E8-4S 0.375-24 UNF-3A 12 0.910 0.335 0.562 300

S76-23 2 ii MS27467T9B98S 0.375-24 UNF-3A 17 1.345 0.610 0.625 925

S76-32 2 i MS3116E8-4S 0.375-24 UNF-3A 12 0.840 0.255 0.562 1600

S76-36 2 i 4-AWG 22 Pigtails, 6 IN. long 0.375-24 UNF-3A 10 0.630 0.335 0.562 1400

S76-38 2 i MS3116E8-4S 0.375-24 UNF-2A 12 0.910 0.335 0.562 825

S76-71 2 ii MS24266B8H3S 0.500-20 UNF-3A 12 0.990 0.380 0.750 580

S76-73 2 iv 2-AWG 22 Pigtails, 12 IN. long 0.375-24 UNF-3A 12 1.150 0.330 0.500 1000

S76-103 2 v 2-AWG 22 Pigtails, 2 IN. long 0.375-24 UNF-3A 24 1.245 0.335 0.562 1300

S76-206 1 vi 3.25 IN. Cable Assembly 0.375-24 UNF-3A 10 0.640 0.335 0.625 925

S76-219 2 i MS3116P-8-4S 0.500-20 UNF-2A 12 1.180 0.480 0.750 2300

S76-501 2 ii PC06E-8-4SW 0.500-20 UNF-3A 12 0.854 0.320 0.623 720

S76-515 2 ii MS27467T9B98S 0.375-24 UNF-3A 12 1.065 0.335 0.625 925

S76-528 1 iii D38999/26WA98SN 0.375-24 UNF-2A 12 1.190 0.335 0.625 900

S76-529 2 i MS27467T11F04S 0.375-24 UNF-3A 12 1.065 0.335 0.750 1300

S76-532 2 ii MS27467T9B98P 0.375-24 UNF-3A 24 17.750 0.335 0.562 925

S76-539 2 i MS3126E10-6S 0.500-20 UNF-3A 12 1.275 0.375 0.625 750

S76-542 1 iii MS20028T9B3S 0.625-16 UN-3A 12 1.220 0.400 0.875 410

S76-551 2 i MS3126E10-6S 0.500-20 UNF-3A 12 1.246 0.346 0.625 750

S76-553 2 i MS3116E8-4S 0.375-24 UNF-2A 12 1.040 0.410 0.620 550

S76-557 2 i MS3116E8-4S 0.375-24 UNF-3A 12 0.910 0.335 0.562 925

S76-603 2 i MS3116E8-4S 0.375-24 UNF-3A 12 0.880 0.335 0.562 925

S76-632 2 i MS3116E8-4S 0.375-24 UNF-3A 12 0.800 0.250 0.562 1600

Dim “C”

OUTPUT PORT

Dim “B”

MATINGCONNECTOR

Dim “A”

BRIDGEWIRE1.0 ± 0.1 OHM

BRIDGEWIRE1.0 ± 0.1 OHM

BLACK

WHITE

BRIDGEWIRE1.0 ± 0.1 OHM

BRIDGEWIRE1.0 ± 0.1 OHM

BRIDGEWIRE1.0 ± 0.1 OHM

BRIDGEWIRE1.0 ± 0.1 OHM

BRIDGEWIRE1.1 ± 0.2 OHM

BRIDGEWIRE1.0 ± 0.1 OHM

BRIDGEWIRE1.0 ± 0.1 OHM

BRIDGEWIRE1.0 ± 0.1 OHM

BRIDGE CIRCUITRESISTANCE.45 - .62 OHM

RED

BLACK

(INITIATOR)EMI/RFI FILTER

i iv

ii v

iii vi

(INITIATOR)

BRIDGEWIRE1.0 ± 0.1 OHM

Electric Initiators

Electric Initiators are commonly used on missiles, launch vehicles, spacecraft, and other aerospace and defense platforms for the initiation of solid rocket motors and other propulsive elements, and actuation of mechanisms such as separation devices, cutters, pin pullers, or isolation valves. The Initiator takes an electrical input and provides work in the form of a pyrotechnic output.

Principle of Operation

The EBAD Series 76 family of initiators are 2-pin or 4-pin, single or dual bridgewire, electrically activated initiators. Upon application of electrical current, heat is generated and transferred from an internal filament or bridgewire to the surrounding pyrotechnic material, causing powder ignition and a rapid output of heat and gas pressure. The flame and hot particle output can be used to ignite downstream pyrotechnics or propellants contained in CAD/PAD devices. For smaller devices, the pressure output of the initiator is sufficient to directly actuate the device without a booster charge. When threaded into a Detonation Booster Assembly (DBA), the initiator is used to provide detonation impetus for stage and fairing separation and other detonation based events. Initiation will reliably occur when a minimum “All-Fire” current is delivered to the bridgewire. Similarly, the device will not be initiated when the current is maintained below the designated “No-Fire” requirement.

Key Features

• Rugged stainless-steel construction

• Standard electrical/mechanical interface

• Proven reliability

• Redundant or non-redundant circuit

• Wide operating temperature range

• Hermetically sealed

Applications

Series 76 Initiators are used in a wide variety of aerospace and defense applications including:

• Initiation of solid rocket motors and thrusters

• Actuation of separation mechanisms such as separation nuts, bolts, cutters, piston actuators, and other CAD/PAD devices

• Propulsion system isolation valve actuation

• Initiation of linear separation events (when coupled with a DBA) such as Linear Shaped Charges and Frangible Joints

Construction

Series 76 initiators feature a stainless steel body that houses all the critical elements of the initiator. The body has an internal glass-to-metal seal that allows for physical isolation of the input electrical connector pins from the output pyrotechnic event. The header design and construction allows for high pressure sealing capability during and after the pyrotechnic event. The time/pressure and caloric output is generated from a Zirconium Potassium Perchlorate (ZPP) and/or a Titanium Hydride Potassium Perchlorate (THPP) output charge. The initiator has elements that electrically isolate the bridgewire from the body and protects against ESD and other stray electrical energy between the pins and the header, and allow the initiator to pass critical Dielectric Strength and Insulation Resistance test environments. The entire assembly is hermetically sealed.

Series 76 Initiators

Cleared for Open Publication by the Defense Office of Prepublication and Security Review, Department of Defense 06/18/2018 18-S-1670 Cleared for Open Publication by the Defense Office of Prepublication and Security Review, Department of Defense 06/18/2018 18-S-1670Cleared for Open Publication by the Defense Office of Prepublication and Security Review, Department of Defense 06/18/2018 18-S-1670