KRE1C05
5V coil high-voltage reed relay with 500V 0.3A switching, 1500V isolation, SIP package for HV applications.
Product Overview
Description
The KRE1C05 is a high-voltage reed relay capable of switching up to 500V with 5V coil excitation.
Features enhanced isolation of 1500V between coil and contacts for high-voltage safety.
Ideal for high-voltage test equipment, power supply testing, and industrial HV applications.
Product Series
KRE
Primary Application
HV test equipment
Key Features
- 500V high voltage switching
- 1500V enhanced isolation
- Hermetically sealed contacts
- Long operational life
- HV SIP package
- 5V coil compatible
- RoHS compliant
Specifications
| Contact Form | SPST-NO |
|---|---|
| Coil Voltage | 5V DC |
| Coil Resistance | 500Ω typical |
| Switching Voltage | 500V DC/AC |
| Switching Current | 0.3A |
| Carry Current | 0.5A |
| Contact Rating | 10W |
| Isolation Voltage | 1500Vrms |
| Operate Time | 1.5ms typical |
| Release Time | 0.5ms typical |
| Package | SIP-4 HV |
| Operating Temperature | -40°C to +85°C |
Applications
HV test equipment
Electronic system design
Power supply testing
Power conversion and supply
Capacitor charging
Battery and charging management
Insulation testing
Electronic system design
Medical equipment
Medical electronics
FAE Expert Insights
"The KRE1C05 with its 1 Form C (SPDT) contact configuration offers more flexibility than the SPST versions. I recommend this when you need both normally-open and normally-closed contacts in a single package. The switching characteristics are identical to the 1A series - fast, reliable, and low contact resistance. One application: switching between two signal sources in test equipment. The break-before-make action ensures no momentary shorting. Design consideration: the coil polarity doesn't matter for reed relays, so you can simplify your drive circuit compared to polarized relays."
High-voltage reed relay for 500V switching applications
— Senior FAE Team, BeiLuo
Frequently Asked Questions
What safety precautions are needed for 500V operation?
For 500V operation: (1) Maintain minimum 6mm creepage and clearance on PCB; (2) Use appropriate insulation materials; (3) Add overvoltage protection; (4) Ensure proper enclosure for user safety; (5) Follow IEC/UL safety standards for HV equipment.
Maintain 6mm clearance, follow safety standards.
Can KRE1C05 switch capacitive loads?
KRE1C05 can switch capacitive loads within its ratings, but inrush current must be limited. Use series resistors or pre-charge circuits for large capacitors. The reed switch can weld if inrush current exceeds ratings. Typical max inrush is 3x rated current for <10ms.
Limit inrush current for capacitive loads.
What is the breakdown voltage of KRE1C05?
The coil-to-contact isolation is rated at 1500Vrms (2121V DC). The contact-to-contact voltage is 500V. These ratings include safety margins. Do not exceed these voltages to prevent insulation breakdown and ensure long-term reliability.
1500Vrms isolation, 500V contact rating.
Is KRE1C05 suitable for RF switching?
While reed relays can switch RF signals, KRE1C05 is not optimized for RF. The long leads and package create parasitic inductance and capacitance. For RF applications above 100MHz, use specialized RF relays with coaxial construction and controlled impedance.
Not optimized for RF - use specialized RF relays.
What is the maximum switching frequency?
Maximum recommended switching frequency is 100Hz for KRE1C05. This is limited by the reed switch mechanical response and contact bounce. For higher frequency switching, use solid-state relays. The operate/release times of 1.5/0.5ms limit practical switching rates.
Max 100Hz switching frequency.