Four PTC Ceramic thermistors for transformer overvoltage protection-MZ4 components are displayed on a white surface.

Five PTC Electronics MZ6 thermal protection PTC devices for transformers.

Four green PTC Transformer overvoltage protection-MZ8E components on a white background.

PTC Electronics for transformer protection-MZ11,MZ8. Green ceramic resistors with DXM MZ11 and MZ8 markings.

PTC Ceramic Electronics for transformer overvoltage protection

The MZ31 series PTC Ceramic thermistor is a reliable solution for transformer overvoltage and overcurrent protection.

Key Features are as below:

● Cost-effective Protection: PTC Ceramic can replace traditional fuses with automatic recovery after faults cost-effectively.

● Self-Resetting: Self-resetting PTC Electronics offer superior performance.

● Versatile Use: PTC Transformer widely used in transformers and adapters.

● Durable and Safe: Contactless and noiseless, ensure circuit stability and safety.

● High Quality: Manufactured by DXM, meet rigorous standards, making them a top choice for various applications.

If you're seeking high-quality protection for your transformers, the MZ31 series PTC Ceramic from China provides the reliability and efficiency you need.

Model Number

MZ31 series

Brand

DXM

INQUIRY

Details

Introduction to PTC Ceramic Thermistors for Transformer Protection

MZ31 series PTC Ceramic thermistors are reliable components for PTC Transformer overvoltage and overcurrent protection. These PTC Electronics elements offer self-resetting capabilities, automatically recovering without triggers or noise. Known as "auto restore fuses," they provide superior protection compared to traditional fuses, which do not reset after a fault. PTC Ceramic thermistors resume their protective function after the issue is resolved, making them ideal for repeated use in sensitive circuits.

Applications of PTC Ceramic Thermistors in Transformer Protection

The MZ31 series PTC Ceramic thermistor is widely used in transformers and adapters for:

Primary PTC transformer for overvoltage protection
Overload protection
Overcurrent protection

These PTC Electronics components are essential in maintaining the integrity and safety of electrical circuits by minimizing residual current through rapid resistance increase and ensuring the overall system’s efficiency.

A diagram showing a PTC Transformer application example with a power supply, diode, capacitor, and a PTC resistor. This example demonstrates how a transformer can be used in conjunction with other components for various applications.

Key Advantages of PTC Electronics for Transformer Overvoltage Protection

1.Automatic circuit protection: PTC Transformer can resume steadily after circuit protection.
2.Contactless,noiseless and flameless.
3.Has complete specification.
4.PTC Ceramic Thermistor Reacts fast.
5.Long stability.
6.With a better performance of overvoltage protection,
suitable for operating in 250/265V AC (high resistance state) continuously
7.Small steady resistance.
8.Low rated current.
9.PTC Electronics components are RoHS compliant.

Key Features of PTC Ceramic in Transformers

Working Principle

As indicated in Fig as below,when the circuit is operating normally, the current flowing through thePTC Ceramic is below the rated current, keeping the thermistor in a low resistance state. This allows the transformer’s primary and secondary loops to function without interruption. If a fault occurs, causing the current to exceed the rated level, the PTC Transformer quickly heats up, significantly increasing its resistance. This action effectively turns off the circuit to prevent damage. Once the fault is resolved, the PTC Electronics return to its low resistance state, allowing the circuit to resume normal operation.

Choosing Guidelines for PTC transformer for Overcurrent and Overload Protection

When selecting a PTC Ceramic for transformer overvoltage protection and overload protection, consider the following factors:

Maximum Operating Current: Ensure it matches the non-trip current of the PTC Electronics.
Maximum Operating Voltage: Must meet or exceed the circuit's requirements.
Rated Zero Power Resistance: Crucial for ensuring proper protection.
Physical Dimensions and Appearance: PTC Transformer should fit the design and layout of your circuit.

The relationship between operating temperature, operating current, and non-operating current is critical, as shown in the above figures. Generally, the operating current is 2-3 times the non-operating current, and both decrease as the operating temperature increases.

Dimesions of MZ31 Series PTC Ceramic (Unit: mm):

Diagram showing different pin form variations of PTC Electronics for transformer overload protection, including straight, axis, and U-shaped pins. The diagram also includes dimensions for each variation.

The part number for the MZ31 series PTC transformer includes the following details:

A diagram illustrating the naming rules of PTC Transformer, with labels for each section of the transformer. The diagram is numbered 1 through 9.

1.Series:PTC Electronics for transformer overvoltage protection
2.Type:1-disc,2-encased,3-pin form-coating,4-pin form non-coating,5-SMD
3.Type:A-general, B-compount, C-moduie
4.Chip size: 8-Φ8mm 9-Φ9mm 11-Φ11mm
5.Curie temperature: F-50℃ H-75℃ N-100℃ P-120℃ K-125℃
6.PTC Transformer R25 resistance: 6R0-6Ω 6R5-6.5Ω 70R-70Ω 121-120Ω
7.Resistance tolerance: K+/-10% M+/-20% H+/-25% N+/-30%
8.Greatly voltage:250-250V 265-265V
9.Wire shape: S-Straight, A-Axis formed, U-In-formed

Specifications and Part Numbers for PTC Ceramic Overload Protection in Transformer

PTC Electronics Embedded in Transformer Wire Coil

Item	PTC Transformer Part No.	Resistance R 25（Ω）	Non-trip current Int（mA）		Tripcurrent @25℃ It（mA）	Max. operating voltage V max (V)	Max. current I m a x ( A )	Curie temperature T c (℃)	Dimension （mm）
Item	PTC Transformer Part No.	Resistance R 25（Ω）	@25℃	@40℃	Tripcurrent @25℃ It（mA）	Max. operating voltage V max (V)	Max. current I m a x ( A )	Curie temperature T c (℃)	D max	T max	Φd
1	MZ31-3A10N12RH265	12	170	95	340	265	1.5	100	11.0	5.0	0.6
2	MZ31-3A12N12RH265	12	210	120	420	265	2.0		13.5	5.0	0.6
3	MZ31-3A10N18RH265	18	145	80	290	265	1.5		11.0	5.0	0.6
4	MZ31-3A12N18RH265	18	180	100	360	265	2.0		13.5	5.0	0.6
5	MZ31-3A10N22RH265	22	125	70	250	265	1.5		11.0	5.0	0.6
6	MZ31-3A07N22RH265	22	110	60	220	265	0.7		8.0	4.5	0.6
7	MZ31-3A08N25RH265	25	110	60	220	265	1.2		9.5	5.0	0.6
8	MZ31-3A08N30RH265	30	100	55	200	265	1.0		9.0	5.0	0.6
9	MZ31-3A07N32RH265	32	95	50	190	265	0.7		8.0	4.5	0.6
10	MZ31-3A08N35RH265	35	90	50	180	265	1.0		9.0	5.0	0.6
11	MZ31-3A08N39RH265	39	95	50	180	265	1.2		9.5	5.0	0.6
12	MZ31-3A08N40RH265	40	85	45	170	265	1.0		9.0	5.0	0.6
13	MZ31-3A07N55RH265	55	70	40	140	265	0.7		8.0	5.0	0.6
14	MZ31-3A05N121H265	120	45	25	90	265	0.4		6.5	5.0	0.6
15	MZ31-3A05N151H265	150	38	20	80	265	0.4		6.5	5.0	0.6

PTC Ceramic Not Embedded in Transformer Wire Coil

Item	Part No.	Resistance R 25（Ω）	Non-trip current Int（mA）		Tripcurrent @25℃ It（mA）	Max. operating voltage V max (V)	Max. current I m a x ( A )	Curie temperature T c (℃)	Dimension （mm）
Item	Part No.	Resistance R 25（Ω）	@25℃	@40℃	Tripcurrent @25℃ It（mA）	Max. operating voltage V max (V)	Max. current I m a x ( A )	Curie temperature T c (℃)	D max	T max	Φd
1	MZ31-3A16P6R0H265	6.0	390	300	780.0	265	3.1	120	17.5	5.0	0.6
2	MZ31-3A13P10RH265	10	260	200	520	265	1.8		14.0	5.0	0.6
3	MZ31-3A12P10RH265	10	250	200	500	265	1.8		13.5	5.0	0.6
4	MZ31-3A08P25RH265	25	130	100	250	265	0.8		9.0	5.0	0.6
5	MZ31-3A08P45RH265	45	105	80	200	265	0.8		9.0	5.0	0.6
6	MZ31-3A08P55RH265	55	90	70	180	265	0.8		6.5	5.0	0.6
7	MZ31-3A05P70RH265	70	65	50	130	250	0.3		6.5	5.0	0.6
8	MZ31-3A03P151H250	150	40	30	75	250	0.2		4.5	5.0	0.5

Notes:

1.PTC Electronics wire shape form can be selected per using condition.
2.R 25 resistance tolerance can be selected per customer’s requirement.
3.Packing of the ptc transformer can be made per customer’s requirement.

Conclusion

The MZ31 series PTC Ceramic is a reliable solution for transformer overvoltage and overcurrent protection. These self-resetting components offer superior performance, replacing traditional fuses with automatic recovery after faults. Widely used in transformers and adapters, these PTC Electronics ensure circuit stability and safety. Manufactured in China by DXM, they meet rigorous standards, making them a top choice for various applications. If you're seeking high-quality protection for your transformers, the MZ31 series PTC Transformer from China provides the reliability and efficiency you need.

You may also like

KTY81-210

KTY81-210 KTY Sensor: Reliable and Precise Temperature Monitoring for Various Applications

Why Choose Resin Coated Type KTY81-210 for Temperature Sensing?

● Good-Quality, High Precision: Good-Quality KTY Sensor delivers accurate, reliable readings with minimal drift.

● Wide Range: KTY temperature sensor operates from -40°C to +80°C, ensuring reliability.

● Durable: Long-lasting and stable, even in harsh environments.

● Versatile: Suitable for automotive, industrial, HVAC, and electronics applications.

● Ideal Replacement, Cost-Effective: Resin Coated Type ideal substitute for Siemens,Philips’s KTY81 SOD70 type with competitive price.

KTY81-210 KTY Sensor: Reliable and Precise Temperature Monitoring for Various Applications

Black wire cable with a white connector on the end of Heat Sensors MF52D.The Heat Sensor is designed for use in Heat Detection.

Picture-of-Heat-Sensors-MF52D.

Heat Sensors for sensing temperature-NTC-MF52D series

Heat Sensors NTC-MF52D series Key Features:

High Precision: Our Heater Sensor delivers accurate temperature readings up to ±1% tolerance, essential for sensitive applications across various industries.

Durable Construction: Engineered for durability, this Heat Sensor is built to withstand harsh conditions, ensuring long-term reliability.

Fast Response Time: With rapid reaction to temperature changes, our NTC Sensors provide real-time monitoring, making them ideal for critical environments.

Competitive Price, Good quality: Despite their high quality, our Heat Sensors are offered at a competitive price, delivering exceptional value for your investment.

Easy Integration: Seamlessly integrates into existing systems, simplifying deployment.

Versatile Applications: Ideal for HVAC, industrial, and consumer electronics.

Heat Sensors for sensing temperature-NTC-MF52D series

NTC-5D-15-thermistor

NTC 5d-15 thermistor Inrush Current Limiter

Key Features of NTC 5D 15 thermistor:
● Reliable Inrush Current Limiter: Protecting electronic circuits from damage.
● Competitive Price, Cost-Effective Solution: Reducing overall system costs.
● Wide Operating Temperature: From -55°C to +200°C, suitable for diverse environments.
● High Durability, Compact Design: Small size encapsulated in phenolic resin, ensuring long-lasting protection.
● High Current Capacity: Maximum steady-state current of 6A, ideal for high-power applications.

NTC 5d-15 thermistor Inrush Current Limiter

A black wire Temp. Sensor with a silver probe and a white connector.

Picture-of-Temp.-Sensor

Temp. Sensor for coffee machine

Temp. Sensor NTS104F3950FAW Key Features:

● High Precision: The Temp. Sensor offers 100KΩ±1% resistance with customizable thermistor B value, ensuring accurate temperature measurement up to 300°C.

● Durability: This Temperature probe Sensor withstands high temperatures (150°C) and harsh conditions, tested for 1000 hours at extreme temperatures.

● Versatile Application: Ideal for HVAC, automotive, medical, and industrial processes with customizable specifications, making it a versatile Temperature sensor probe.

● Quality Construction: Made from A316L or A304L stainless steel with a high-temperature resistant FDA-compliant gasket.

● Cost-Effective & High Quality: Provides reliable, long-lasting performance at an competitive price, ensuring excellent value for various applications

Temp. Sensor for coffee machine

NTC-thermistor-10D-9

ntc 10d 9 thermistor

Key Features of NTC 10D-9 Thermistor:
● Effective inrush current limiting.
● Effective overcurrent protection, Wide Applications.
● Small size, Reliable high power handling, Durable and RoHS Compliant.
● Fast Response to surge currents, ensuring immediate circuit protection.
● Wide Operates Temperature Range from -55°C to +200°C.

ntc 10d 9 thermistor

Two blue Ceramic Disc Capacitors (Y Capacitor-Y1 Capacitor, Y2 Capacitor) with wire leads. The capacitor on the right has text on it.

Ceramic-Disc-Capacitor-(Y-Capacitor-Y1-Capacitor,-Y2-Capacitor)

High-Quality Ceramic Disc Capacitor (Y Capacitor) for Reliable AC Circuit Performance

Ceramic Disc Capacitor (Y Capacitor ) Key Features:

● Safety Compliance: Meets global safety certifications for AC voltage circuits.

● Wide Capacitance Range: Suitable for diverse electronic applications.

● EMI Suppression: Essential for reducing electromagnetic interference.

● Fire-Resistant: UL 94V-0 epoxy coating for enhanced safety.

● Cost-Effective, Good Quality: High performance at a competitive price.

High-Quality Ceramic Disc Capacitor (Y Capacitor) for Reliable AC Circuit Performance

PTC-Sensor-temperatura-MZ5

PTC sensor thermistor for overheat protection-MZ5 series

PTC Sensor MZ5 series Key Features:

Reliable Overcurrent Protection: The Heat Sensor acts as a resettable fuse, preventing circuit damage from excessive current, ensures safety in electronic systems.

Efficient Temperature Control: This Heater Sensor is ideal for automotive and heating systems, providing consistent temperature management.

Self-Regulating and Safe: The Sensor Thermistor increases resistance automatically to prevent overheating, enhancing safety.

Versatile Applications: Perfect for transformers, power devices, and fire detection systems, offering broad applicability.

Compact and Cost-Effective: Small size ensures easy installation. High quality and competitive pricing make it a valuable choice.

PTC sensor thermistor for overheat protection-MZ5 series

A black Heat Sensor Thermistor NTC-MF52C with bead head and black wires on a white background.

Picture-of-Heat-Sensor-Thermistor-NTC-MF52C

Heat Sensor Thermistor MF52C for Heat Detection

Heat Sensor MF52C Key Features

● High Precision & Fast Response: The high-performance Heat Sensor MF52C, offers ±0.1℃ accuracy for critical applications.

● Wide Operating Range: These Temp Sensors operate reliably from -40℃ to +105℃, suitable for various environments.

● Versatile Applications: Wide resistance range 2~200KΩ,the NTC Sensor is ideal for appliances, medical devices, and automotive systems.

● Long-Term Stability: The Sensor Thermistor MF52C ensures consistent performance over time.

● Cost-Effective, Good quality: provides an good quality economical solution for diverse uses.

Heat Sensor Thermistor MF52C for Heat Detection

DXM

DXM emphasizes quality management and operates in strict accordance with the ISO 9001 international quality management system and the international AQL standard.

Social Media: