Diodes , Thermal Fuses , Thermal Switches
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Diodes , Thermal Fuses , Thermal Switches

Our most Popular Replacement Diodes (rectifiers), Thermal Fuses and Thermal Switches for 3M, Apollo, Dukane, Eiki, Elmo, American Optical and Buhl Overhead Projectors. Many of these diodes (rectifiers), Thermal Fuses and Thermal Switches have been discontinued by the manufacturer, but are in stock and available exclusively through M-B Electronics. You can also call us toll free at 800-872-9456 for more information.

Go to:Overhead Projector Parts

Parts and Service Manuals available here.

Overhead Projector Diodes informational article.

Thermal Fuses and Thermal Switches informational article.

Discontinued Overhead Projector Parts informational article.?

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Eiki 078874 Diode (rectifier)

Part Number: 078874
Order Code: 078874
Specifications:
    One in line diode (rectifier) per projector required.
Features:
    This popular diode (rectifier) used in the Eiki overhead projectors was discontinued by Eiki in late spring of 2004. M-B Electronics is proud to announce that we have this part in stock and ready for immediate shipment! The purpose of the diode (rectifier) in this unit is to drop the line voltage (120v) at the lamp socket to (82v) Once the diode is compromised the lamp socket has (120v) across it and lamps will burn out immediatley until the diode is replaced.
Price: $13.74
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Buhl P2900A-298 Diode (rectifier)

Part Number: MB9077A
Order Code: MB9077A
Specifications:
    One Diode Per Overhead Projector Required
Features:
    This diode (rectifier) used in the Buhl 120 series is available and in stock at M-B Electronics. It is available for immediate shipment! The purpose of the diode (rectifier) in this unit is to drop the line voltage (120v) at the lamp socket to (82v) Once the diode is compromised the lamp socket has (120v) across it and lamps will burn out immediatley until the diode is replaced.
Price: $9.46
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Buhl 90-77 Diode (rectifier)

Part Number: 90-77
Order Code: 90-77
Specifications:
    One Diode (rectifier) per projector is required.
Features:
    This diode (rectifier) is used in the Buhl 90 Educator Series Overhead Projector. This diode is in stock and ready for immediate shipment! The purpose of the diode (rectifier) in this unit is to drop the line voltage (120v) at the lamp socket to (82v) Once the diode is compromised the lamp socket has (120v) across it and lamps will burn out immediatley until the diode is replaced.
Price: $9.46
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Elmo Diode 5S2S4VB20 (rectifier)

Part Number: 5S2S4VB20
Order Code: 5S2S4VB20
Specifications:
    One Diode (rectifier) per projector is required.
Features:
    This diode (rectifier) is used in the Elmo overhead projectors. This diode is available and available for immediate shipment! The purpose of the diode (rectifier) in this unit is to drop the line voltage (120v) at the lamp socket to (82v) Once the diode is compromised the lamp socket has (120v) across it and lamps will burn out immediatley until the diode is replaced.
Price: $12.10
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Dalite 51606 Diode (rectifier)

Part Number: 51606
Order Code: 51606
Specifications:
    One Diode (rectifier) required per projector.
Features:
    This diode (rectifier) has been discontinued by Dalite. It is now available as a Dalite diode kit exclusively from M-B Electronics. This Diode used in the Dalite PS-360 and Dalite G-200 Overhead Projectors. This diode kit is in stock and ready for immediate shipment! The purpose of the diode (rectifier) in this unit is to drop the line voltage (120v) at the lamp socket to (82v) Once the diode is compromised the lamp socket has (120v) across it and lamps will burn out immediatley until the diode is replaced.
Price: $10.87
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Apollo 755-610-008 Diode

Part Number: 755-610-008
Order Code: 755-610-008
Specifications:
  • One diode per unit is required.
  • You may also want to replace p/n 755-610-007 supressor when replacing this diode. Ask the sales rep for more information when ordering.
Features:
    This diode (rectifier) is used in the Apollo Overhead Projectors. This part is available and ready for immediate shipment! The purpose of the diode (rectifier) in this unit is to drop the line voltage (120v) at the lamp socket to (82v) Once the diode is compromised the lamp socket has (120v) across it and lamps will burn out immediatley until the diode is replaced.
Price: $9.46
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3M 78-8062-1180-7 Diode (rectifier)

Part Number: 78-8062-1180-7
Order Code: MB1180-KIT
Specifications:
    Replaces 3m 78-8073-6970-3 and 3M 78-8062-1180-7 Diode (rectifier)
Features:
    This 3M Diode (rectifier) is used to drop the line voltage of 120VAC to the 82V required to operate the projection lamp.
Price: $12.10
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3M 78-8064-1836-1 Diode (rectifier)

Part Number: 78-8064-1836-1
Order Code: MB1836-KIT
Specifications:
    One diode (rectifier) is required per projector. Replaces old 3M Diode (rectifier) number 78-8064-1834-5 and 3M 78-8064-1836-1
Features:
    This 3M Diode (rectifier) is used to drop the line voltage of 120VAC to the 82V required to operate the projection lamp.
Price: $12.10
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Apollo 755-610-007 Supresssor

Part Number: 755-610-007
Order Code: 755-610-007
Specifications:
    Supressor for Apollo Overhead Projectors
Features:
    The supressor should be replaced when replacing the Apollo 755-610-008 diode (rectifier)
Price: $9.05
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Eiki 712566 Diode (rectifier)

Part Number: 712566
Order Code: MB4235
Specifications:
    Use MB Electronics replacement diode (rectifier) part number MB4235
Features:
    This Eiki Diode (rectifier) is used to drop the line voltage of 120VAC to the 82V required to operate the projection lamp.
Price: $10.95
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3M 78-8052-8351-8 Diode (rectifier)

Part Number: 78-8052-8351-8
Order Code: MB2139077
Specifications:
    The 3M Diode (rectifier) part number 78-8052-8351-8 was discontinued by 3M. M-B Electronics is pleased to announce that we now carry this 3M Diode in a replacement kit. The kit will replace 3M part number 78-8052-8351-8. We have this kit in stock and available for immediate shipment!
Features:
    This diode from 3M controls the voltage that is delivered to the lamp. If the diode is defective your unit will blow projection lamps. Use M-B Electronics Part Number 213MB9077
Price: $12.10
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Bell & Howell 077177 Thermal Fuse

Part Number: 077177
Order Code: 077177
Specifications:
    This very popular Protective Thermal Fuse used in the older model Bell & Howell Overhead Projectors is no longer available from the Mfg., but is available and ready for immediate shipment from M-B Electronics.
Features:
    Protects your Overhead Projector from overheating and damaging internal parts such as your Fresnel lens.
Price: $11.99
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Eiki Thermal Fuse 078900

Part Number: 078900
Order Code: 078900
Specifications:
    This Protective Thermal Fuse has been discontinued by Eiki, but is still avialable at M-B Electronics.This thermal Fuse is available for immediate shipment.
Features:
    Protects your Overhead Projector from overheating and damaging internal parts such as your Fresnel Lens.
Price: $11.99
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Buhl Thermal Fuse 90-61

Part Number: 90-61
Order Code: 90-61
Specifications:
    This thermal fuse, part number 90-90 or 90-61, used in the Buhl Overhead Projector is available for immediate shipment from M-B Electronics.
Features:
    This Thermal Fuse used in the Buhl 90 series Overhead Porjectors is used to protect your Fresnel Lens in your Overhead Porjector from being damaged due to overheating.
Price: $8.49
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Buhl Thermal Fuse 90-90

Part Number: 90-90
Order Code: 90-90
Specifications:
    This thermal fuse, part number 90-90 or 90-61, used in the Buhl Overhead Projector is available for immediate shipment from M-B Electronics.
Features:
    This Thermal Fuse used in the Buhl 90 series Overhead Porjectors is used to protect your Fresnel Lens in your Overhead Porjector from being damaged due to overheating.
Price: $8.49
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Elmo Thermal Switch

Part Number: MB5E9079
Order Code: MB5E9079
Specifications:
    Replaces the Elmo Thermostat part numbers 5E9079 and 5E9015.
Features:
    This popular normally closed thermostat for the Elmo HPL14 is now available from M-B Electronics under the new replacement part number of MB5E9079. It is no longer avialable form Elmo.
Price: $14.27
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Dalite Thermal Switch (2)

Part Number: 51544
Order Code: 51544
Specifications:
    Normally Open Thermal switch
Features:
    This popular Thermal Switch used in the Dalite G100, G200, L101 and other Overhead projectors is available now from M-B Electornics.
Price: $14.95
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Dalite Thermal Switch (1)

Part Number: 51551
Order Code: 51551
Specifications:
    Normally closed thermostat
Features:
    This safety thermostat is used to protect the internal components like the Fresnel Lens of your Dalite Overhead Projecotr. It is available from M-B Electronics.
Price: $14.95
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Dukane Diode (rectifier)

Part Number: 595-91
Order Code: 595-91
Specifications:
    Diode (rectifier)
Features:
    This popular Dukane Diode (rectifier) also comes with the clip to hold the diode in place.
Price: $10.87
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Dukane Lamp Protector

Part Number: 110-3640
Order Code: 110-3640
Specifications:
    Lamp protection module
Features:
    Dukane 110-3640 lamp protection module, one required per unit.
Price: $24.00
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Eiki ASYM09394C Diode (rectifier)

Part Number: ASYM09394C
Order Code: MB4235
Specifications:
    Why replace the entire Diode (rectifier) PCB assebly when all you need is the diode to repair the problem. Use M-B Electronics MB5324 Diode (rectifier) as a direct replacement for the diode found on the Eiki 3850 Series Overhead Porjector PCB assembly.
    Diode only, does not include the PCB
Features:
    Why replace the entire Diode (rectifier) PCB assebly when all you need is the diode to repair the problem. Use M-B Electronics MB5324 Diode (rectifier) as a direct replacement for the diode found on the Eiki 3850 Series Overhead Porjecotr PCB assembly. We also have the thermsitor that is on this PC Diode Board as well. Contact us for details.
Price: $10.95
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Apollo Diode PCB Assembly

Part Number: 041-216-450
Order Code: 041-216-450
Specifications:
    Diode PCB Assembly Uses Apollo Diode (rectifier) 755-610-008 and Supressor 755-610-007
Features:
    This Diode (rectifier) PCB Assembly is used in the Apollo 2200 Series Overhead Projectors.
Price: $46.50
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Dukane Diode PCB

Part Number: 91000000360
Order Code: 91000000360
Specifications:
    Used on the EP1800 and the Viewtech EP1900
Features:
    This is the replacment Diode (rectifier) PCB for the Dukane EP-1800 Overhead Projector.
Price: $26.99
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3M Safety Thermal Switch

Part Number: 78-8079-9010-2
Order Code: 78-8079-9010-2
Specifications:
    The safety thermostat on the 3M 9000 series Overhead Projector is used to protect the projector from overheating. If this part fails there will be now power to the lamp or fan of the Overhead Porjector.
Features:
    Used on the 3M 9800 Overhead Projector. This is a normally closed safety thermal switch.
Price: $14.69
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Laminex Minikote G2 Thermal Cutout

Part Number: 920501
Order Code: 920501
Specifications:
    Replacement thermal cut out for the Laminex Minikote G2 roll laminator.
Features:
Price: $Call
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Apollo Diode PCB

Part Number: E20064
Order Code: E20064
Specifications:
    Diode PCB for the Apollo Horizon II V16000. The diode (rectifier) and the supressor are also available as seperate components. Call for details
Features:
Price: $46.50
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