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The MZ6T series is applied for motor protection PTC Thermistor
The MZ6T series is applied for motor protection PTC Thermistor
Specifications
Brand Name :
UCHI
Model Number :
MZ6T
Certification :
UL.VDE,SGS,REACH,CQC,CSA.ISO.ROHS,CUL
Place of Origin :
Dongguan，Guangdong,China
MOQ :
1000PCS
Price :
Negotiable
Payment Terms :
T/T,Paypal,Western Union,Money gram
Supply Ability :
5000,000,000PCS Per Month
Delivery Time :
5-7 days
Packaging Details :
Bulk
Ptc Curie Temperature :
115±7℃
Responsetime :
Milliseconds range
Wire Tension :
Under 10N, 10S tension without damage
Features :
Long life
Surface Temp Tolerance :
±7℃
Type :
Positive Temperature Coefficient (PTC) Thermistor
Max Power :
10mW
Diameter :
14mm
Lead Spacing :
5mm
Operating Voltage Max :
350V
Thcikness :
2.5mm max
Description

MZ6T Series | PTC Thermistor Dedicated for Motor Protection

Product Overview

The MZ6T series is a wire-harness type PTC thermistor designed in accordance with international standards DIN 44081 / 44082, specially developed for over-temperature protection of motor windings and bearings. Embedded in the three-phase windings of motors, its resistance rises sharply when the temperature approaches the insulation class limit. Combined with a protector to cut off the power supply, it realizes rapid protection against overheating, overload and phase loss. It serves as a standard core temperature control component for industrial motors.

Working Principle

Low resistance at room temperature(R25 ≤ 100Ω / 300Ω), recognized as normal status by the protector;
When the motor overheats and the temperature reaches the operating temperature Tk, the resistance changes sharply to the kilo-ohm level;
Once the protector detects the high-resistance signal, it trips and shuts down immediately to prevent motor burnout;
The resistance automatically drops after cooling down. No replacement is required, and repeated use is available.

Core Features

✅ Standard Compliance: Compliant with DIN 44081/44082, compatible with mainstream temperature control modules (e.g. INT69);
✅ Ultra-compact Size: Chip size only 1.8×0.6 mm, easy to embed into windings without affecting insulation performance;
✅ Fast Response: Operates within ＜5 seconds under thermal overload or phase loss conditions, much faster than traditional thermal relays;
✅ Precise Temperature Control: Tk ranges from 60℃ to 180℃ (5℃ interval), tolerance ±5℃, perfectly matching motor insulation classes (Class B / F / H);
✅ Long-term Stability: Adopts ceramic substrate and insulated packaging, featuring vibration resistance, aging resistance and long service life;
✅ Flexible Installation: MZ6T adopts long lead wire harness design, suitable for winding embedding, bearing surface mounting and other working conditions.

Typical Applications

Industrial motors, water pump / fan motors, compressor motors;
Servo motors, stepping motors, new energy vehicle drive motors;
Transformers, reactors, high-power inductive coils;
Other electromagnetic equipment requiring overheating, overload and phase-loss protection.

Typical Electrical Parameters

Item Single-core (Type E) Three-core Series (Type DS)
Operating Temperature Tk 60～180℃ (5℃ step) 60～180℃ (5℃ step)
Resistance at 25℃ (R25) ≤100Ω ≤300Ω
Resistance at Tk-5℃ ≤550Ω ≤1650Ω
Resistance at Tk+5℃ ≥1300Ω ≥4000Ω
Maximum Working Voltage DC 25V DC 25V
Response Time TD ＜5s ＜5s
Dielectric Strength 2.5kV 2.5kV

Model Example

MZ6T-150-ES: Wire harness type, 150℃, single-core (suitable for Class B/F motors);

MZ6T-180-DS: Wire harness type, 180℃, three-core series connection (suitable for Class H motors).

The MZ6T series is applied for motor protection PTC ThermistorThe MZ6T series is applied for motor protection PTC Thermistor

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Product Detail
Brand Name :
UCHI
Model Number :
MZ6T
Certification :
UL.VDE,SGS,REACH,CQC,CSA.ISO.ROHS,CUL
Place of Origin :
Dongguan，Guangdong,China
MOQ :
1000PCS
Price :
Negotiable
Contact Supplier
The MZ6T series is applied for motor protection PTC Thermistor

Guangdong Uchi Electronics Co.,Ltd

Verified Supplier
13 Years
guangdong, dongguan
Since 2006
Business Type :
Manufacturer, Exporter
Main Products :
Metal Oxide Varistor, SMD Varistor, Thermally Protected Varistor
Total Annual :
1,500,000-2,500,000
Employee Number :
138~168
Certification Level :
Verified Supplier
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