# Resettable Fuse, PPTC, PolySwitch RHEF, 30 VDC, 500 mA, 900 mA, 2.5 s, Round
**URL**: https://novapart.co/products/RHEF050/resettable-fuse-pptc-polyswitch-rhef-30-vdc-500-ma
**SKU**: RHEF050
**Manufacturer**: LITTELFUSE
**Category**: Circuit Protection || Thermistors || Resettable Fuses || Radial Leaded PPTCs
**Price**: €0.3060
**Stock**: 25+
**Lead Time**: 85 days (indicative)
## Description
Thermistor Mounting:Through Hole; Product Range:PolySwitch RHEF Series; Holding Current:500mA; Tripping Current:900mA; Voltage Rating:30VDC; Operating Temperature Min:-40°C; Operating
## Specifications
| Parameter | Value |
|---|---|
| Height | 12.7mm |
| Length | - |
| Diameter | 7.4mm |
| Thickness | 3mm |
| Fuse Shape | Round |
| Lead Spacing | 5.8mm |
| Time To Trip | 2.5s |
| Trip Current | 900mA |
| Product Range | PolySwitch RHEF |
| Voltage Rating | 30VDC |
| Holding Current | 500mA |
| Current Rating Max | 40A |
| Thermistor Mounting | Through Hole |
| Operating Temperature Max | 125°C |
| Operating Temperature Min | -40°C |
| Automotive Qualification Standard | - |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:2309128/)
**PolySwitch® PRODUCT: RHEF050 PTC Devices** DOCUMENT: SCD25583 ~~PT~~ REV LETTER: E **Overcurrent Protection Device** REV DATE: July 26,2016 PAGE NO.: 1 OF 2
## **S ecification Status: Released** ~~Po~~ **p**
**Electrical Rating Voltage: 30V MAX Current: 40A MAX** Insulating Material:
Cured, Flame Retardant Epoxy Polymer meets UL94 V-0 Requirements
Lead Material: 24 AWG Tin Plated Copper Clad Steel Part Marking: Manufacturer’s Mark H0.5 and Part Identification -—
Lot Identification
## **TABLE I. DIMENSIONS:**
|||A|B||C||D|D||E|||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|||MIN
MAX
MIN
MAX|||MIN
MAX|MIN||MAX||MIN
MAX|||
|mm:||mm:
--
7.4|--
12.7||4.3
5.8|7.6||--||--
3.0|||
|in*:|in*:|--
(0.29)
--
(0.50)|||(0.17) (0.23)|(0.30)||--||--
(0.12)|||
|*Rounded off approximation|||||||||||||
|**TABLE II. PERFORMANCE RATINGS:**|||||||||||||
|||I HOLD|CURRENT||TIME TO|INITIAL||||ONE-HOUR|ONE-HOUR|NOMINAL|
|||RATED|RATINGS||TRIP|RESISTANCE|||RESISTANCE|POST-TRIP|POST-TRIP|TRIPPED|
|||CURRENT||||VALUES||||RESISTANCE||POWER|
|||||||||||STANDARD|STANDARD|DISSIPATION|
|||||||||||TRIP|||
|||AMPS|AMPS AT||SECONDS AT|OHMS||||OHMS||WATTS AT|
|||AT 25°C|25°C||25°C, 2.5A|AT 25°C||||AT 25°C||25°C 30V|
|||HOLD|HOLD
TRIP||MAX|MIN||MAX||MAX|||
|||0.50|0.50
0.92||2.5|0.48|0.48|0.78||1.1||0.9|
Agency Recognitions: UL, CSA, TUV Reference Documents: PS300 Precedence: This specification takes precedence over documents referenced herein. Effectivity: Reference documents shall be the issue in effect on the date of invitation for bid. CAUTION: Operation beyond the rated voltage or current may result in rupture, electrical arcing or flame.
## **Materials Information**
**ROHS Compliant ELV Compliant Pb-Free Halogen Free*** HF © -
* Halogen Free refers to: Br≤900ppm, Cl≤900ppm, Br+Cl≤1500ppm.
© 2016 Littelfuse,Inc. littelfuse.com Specifications are subject to change without notice. Revised July 26,2016
**PolySwitch® PRODUCT: RHEF050 PTC Devices** DOCUMENT: SCD25583 ~~PT~~ REV LETTER: E **Overcurrent Protection Device** REV DATE: July 26,2016 PAGE NO.: 2 OF 2
Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, military, aerospace, medical, lifesaving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse.
© 2016 Littelfuse,Inc. littelfuse.com Specifications are subject to change without notice. Revised July 26,2016
## Links
- [View this product on Novapart](https://novapart.co/products/RHEF050/resettable-fuse-pptc-polyswitch-rhef-30-vdc-500-ma)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/raychem-te-connectivity/rhef050/fuse-ptc-reset-30v-500ma-radial/dp/2309128)
---
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