Microtemp G4A01072C Thermal Fuse Kit
Microtemp’s G4A01072C kit ranks as best-in-class for aquarium pumps and controller repairs because it combines an OEM-grade thermal fuse construction with reliable temperature cutoffs suited to continuous-water environments. It edges out commodity kits by offering industry-grade consistency and longer service life, which can reduce replacement frequency and total maintenance cost for hobbyists and professionals alike.
Fast cut-offs
Compact precision
Fast cut-offs
Compact precision
Review Summary
"Users report the Microtemp G4A01072C is a reliable, consistent thermal fuse with solid build quality and predictable trip behavior; some note limited lead length and narrow compatibility for certain pump models."
Tiny heat ninja
Microtemp G4A01072C is an OEM-style thermal fuse commonly used as a direct replacement for pump motor protection.
Tiny heat ninja
Microtemp G4A01072C is an OEM-style thermal fuse commonly used as a direct replacement for pump motor protection.
Increased Safety & Security
Time-Saving Convenience
Microtemp’s G4A01072C kit ranks as best-in-class for aquarium pumps and controller repairs because it combines an OEM-grade thermal fuse construction with reliable temperature cutoffs suited to continuous-water environments. It edges out commodity kits by offering industry-grade consistency and longer service life, which can reduce replacement frequency and total maintenance cost for hobbyists and professionals alike.
Fast cut-offs
Compact precision
Tiny heat ninja
Microtemp G4A01072C is an OEM-style thermal fuse commonly used as a direct replacement for pump motor protection.
Designed to open at approximately 72°C to prevent overheating and thermal damage.
Fast cut-offs
Compact precision
Tiny heat ninja
Microtemp G4A01072C is an OEM-style thermal fuse commonly used as a direct replacement for pump motor protection.
Designed to open at approximately 72°C to prevent overheating and thermal damage.
$8-15 USD
AUPO KSD301 Thermostat Switch Kit
The AUPO KSD301 kit is a cost-effective choice that uses bimetal thermostat switches ideal for temperature cycling control in aquarium controllers and pump housings; its reusable switching action makes it more flexible than single-use thermal cutoffs. While less precision-focused than Microtemp or Cantherm fuses, AUPO delivers strong value for DIYers and systems that need on/off temperature regulation rather than absolute fail-safe cutoff.
Temperature control
Rugged toggle
Temperature control
Rugged toggle
Review Summary
"Buyers find the AUPO KSD301 thermostat switches affordable and responsive for aquarium controllers, offering good repeatability; a minority report set-point variance and occasional early failures or fitment issues."
DIY-friendly clicker
KSD301 bimetal thermostat switches provide snap-action on/off control for temperature regulation in controllers and heaters.
DIY-friendly clicker
KSD301 bimetal thermostat switches provide snap-action on/off control for temperature regulation in controllers and heaters.
Increased Safety & Security
Skill Development & Mastery
Time-Saving Convenience
The AUPO KSD301 kit is a cost-effective choice that uses bimetal thermostat switches ideal for temperature cycling control in aquarium controllers and pump housings; its reusable switching action makes it more flexible than single-use thermal cutoffs. While less precision-focused than Microtemp or Cantherm fuses, AUPO delivers strong value for DIYers and systems that need on/off temperature regulation rather than absolute fail-safe cutoff.
Temperature control
Rugged toggle
DIY-friendly clicker
KSD301 bimetal thermostat switches provide snap-action on/off control for temperature regulation in controllers and heaters.
Available in multiple cut-in/cut-out temperatures and typically auto-reset on cooldown for reusable protection.
Temperature control
Rugged toggle
DIY-friendly clicker
KSD301 bimetal thermostat switches provide snap-action on/off control for temperature regulation in controllers and heaters.
Available in multiple cut-in/cut-out temperatures and typically auto-reset on cooldown for reusable protection.
$7-20 USD
Cantherm MF52A Series Thermal Cutoff Kit
Cantherm’s MF52A series is a market leader prized for tight temperature tolerances and stability, making it a top pick for sensitive aquarium controllers and premium pump systems where thermal protection accuracy matters. Compared with lower-cost alternatives, Cantherm balances mid-market pricing with higher specification reliability, which reduces false trips and supports long-term protection in higher-end installations.
Reliable trips
High-temp rated
Reliable trips
High-temp rated
Review Summary
"The Cantherm MF52A series is praised for accurate, compact thermal cutoff performance and durability in repeated use; a few users experienced fragile leads or slight deviations from nominal trip temperatures."
Silent watchdog
Cantherm MF52A series offers compact temperature sensing/thermostat elements suited for accurate controller feedback.
Silent watchdog
Cantherm MF52A series offers compact temperature sensing/thermostat elements suited for accurate controller feedback.
Increased Safety & Security
Time-Saving Convenience
Cantherm’s MF52A series is a market leader prized for tight temperature tolerances and stability, making it a top pick for sensitive aquarium controllers and premium pump systems where thermal protection accuracy matters. Compared with lower-cost alternatives, Cantherm balances mid-market pricing with higher specification reliability, which reduces false trips and supports long-term protection in higher-end installations.
Reliable trips
High-temp rated
Silent watchdog
Cantherm MF52A series offers compact temperature sensing/thermostat elements suited for accurate controller feedback.
Stable thermal response and solderable leads simplify integration into aquarium controller circuits and housings.
Reliable trips
High-temp rated
Silent watchdog
Cantherm MF52A series offers compact temperature sensing/thermostat elements suited for accurate controller feedback.
Stable thermal response and solderable leads simplify integration into aquarium controller circuits and housings.
$12-25 USD
Uxcell 10A 250V Thermal Protector Kit
Uxcell’s 10A/250V thermal protector kit focuses on affordability and broad compatibility, offering snap-action protectors that are easy to install in many common aquarium pumps and inline controllers. It’s the most budget-friendly option here for basic overload/overheat protection under typical aquarium loads, though it sacrifices some of the precision and certification pedigree that premium kits provide.
High current
Panel-ready
High current
Panel-ready
Review Summary
"Uxcell 10A 250V thermal protectors are seen as an economical option for DIY pump protection with generally acceptable performance; quality control is inconsistent and some units failed after months of use."
Beefy little guardian
Uxcell thermal protectors are rated for up to 10A at 250V, making them suitable for higher-load aquarium pumps.
Beefy little guardian
Uxcell thermal protectors are rated for up to 10A at 250V, making them suitable for higher-load aquarium pumps.
Increased Safety & Security
Time-Saving Convenience
Skill Development & Mastery
Uxcell’s 10A/250V thermal protector kit focuses on affordability and broad compatibility, offering snap-action protectors that are easy to install in many common aquarium pumps and inline controllers. It’s the most budget-friendly option here for basic overload/overheat protection under typical aquarium loads, though it sacrifices some of the precision and certification pedigree that premium kits provide.
High current
Panel-ready
Beefy little guardian
Uxcell thermal protectors are rated for up to 10A at 250V, making them suitable for higher-load aquarium pumps.
Typically feature auto-reset bimetal behavior to restore operation after a safe cooldown period.
High current
Panel-ready
Beefy little guardian
Uxcell thermal protectors are rated for up to 10A at 250V, making them suitable for higher-load aquarium pumps.
Typically feature auto-reset bimetal behavior to restore operation after a safe cooldown period.
$10-22 USD
BOJACK SF214E Thermal Fuse Assortment Kit
The BOJACK SF214E assortment kit is tailored for maintenance-ready hobbyists and service shops, delivering multiple thermal fuse ratings in one pack so technicians can quickly match replacements for a range of pumps and controllers. While not positioned as the highest-spec single part, its assortment format provides the best inventory efficiency and lowest per-repair cost compared with buying individual premium fuses.
Multiple sizes
Quick replacements
Multiple sizes
Quick replacements
Review Summary
"The BOJACK SF214E assortment is valued for its range and cost-effectiveness for hobbyist repairs, reliably covering common fuse needs; several users reported occasional mislabeled sizes or intermittent reliability issues."
Fuse party pack
BOJACK SF214E kits include an assortment of thermal fuses/cutoffs in multiple temperature ratings for versatile on-hand repairs.
Fuse party pack
BOJACK SF214E kits include an assortment of thermal fuses/cutoffs in multiple temperature ratings for versatile on-hand repairs.
Increased Safety & Security
Time-Saving Convenience
Skill Development & Mastery
The BOJACK SF214E assortment kit is tailored for maintenance-ready hobbyists and service shops, delivering multiple thermal fuse ratings in one pack so technicians can quickly match replacements for a range of pumps and controllers. While not positioned as the highest-spec single part, its assortment format provides the best inventory efficiency and lowest per-repair cost compared with buying individual premium fuses.
Multiple sizes
Quick replacements
Fuse party pack
BOJACK SF214E kits include an assortment of thermal fuses/cutoffs in multiple temperature ratings for versatile on-hand repairs.
Color-coded or labelled elements let technicians quickly match the original cutoff temperature of pumps and controllers.
Multiple sizes
Quick replacements
Fuse party pack
BOJACK SF214E kits include an assortment of thermal fuses/cutoffs in multiple temperature ratings for versatile on-hand repairs.
Color-coded or labelled elements let technicians quickly match the original cutoff temperature of pumps and controllers.
$15-30 USD