# Resonator, SMR Series, 4 MHz, ± 0.5%, ± 0.3%, 30 ohm
**URL**: https://novapart.co/products/SMR-4.000-B/resonator-smr-series-4-mhz-05-03-30-ohm
**SKU**: SMR-4.000-B
**Manufacturer**: RALTRON
**Category**: Crystals & Oscillators || Resonators
**Price**: €0.1650
**Stock**: 1000+
**Lead Time**: 78 days (indicative)
## Specifications
| Parameter | Value |
|---|---|
| Svhc | No SVHC (04-Feb-2026) |
| Frequency | 4MHz |
| No. Of Pins | 3Pins |
| Product Range | SMR Series |
| Resonant Frequency | 4MHz |
| Resonant Impedance | 30ohm |
| Frequency Stability | ± 0.3% |
| Frequency Tolerance | ± 0.5% |
| Oscillator Mounting | SMD |
| Operating Temperature Max | 85°C |
| Operating Temperature Min | -25°C |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:4165838/)
**SURFACE MOUNT CERAMIC RESONATOR**
Page 1 of 2
## **SMR-4.000-B**
## **ELECTRICAL SPECIFICATIONS**
|**PARAMETER**|**PARAMETER**|**VALUE**|
|---|---|---|
|NOMINAL FREQUENCY||4.000 MHz|
|FREQUENCY TOLERANCE AT 25°C, MAX||±0.5%|
|FREQUENCY STABILITY OVER TEMPERATURE,MAX||±0.3%|
|OPERATING TEMPERATURE RANGE||-25°C TO +85°C|
|AGING OVER 10YEARS,MAX||±0.3%|
|RESONANT IMPEDANCE,MAX||30 |
|BUILT INCAPACITANCE(C1=C2), ±20%||33 pF|
|WITHSTANDINGVOLTAGE(DC,1 MAX)||50V|
|INSULATION RESISTANCE,MIN||500MΩ|
|INPUT VOLTAGE|DCVOLTAGE|6V|
||ACVOLTAGE(PEAK TOPEAK)|15V|
|STORAGE TEMPERATURE||-55°C TO +85°C|
## **MECHANICAL SPECIFICATION**
RALTRON ELECTRONICS 10400 N.W . 33[r d ] STREET Miami, Florida 33172 U.S.A. Telephone: +1-305-593-6033 Fax: +1-305-594-3973 e-mail: sales@raltron.com web site: http://www.raltron.com
Page 2 of 2
## **SURFACE MOUNT CERAMIC RESONATOR**
## **SMR-4.000-B**
## **REFLOW PROFILE**
**==> picture [377 x 345] intentionally omitted <==**
**----- Start of picture text -----**
||||||||
|---|---|---|---|---|---|---|
|tP|
|TP|
|Critical Zone|
|Ramp-up|TL to TP|
|TL|
|TSMAX|tL|
|Temp.|
|[°C]|
|Ramp-down|
|TSMIN|
|tS Preheat|
|Time [sec]|
|t[25°C] to Peak|
|Reflow profile|
|Temperature Min Preheat|TSMIN|140°C|
|Temperature Max Preheat|TSMAX|160°C|
|Time|(TSMIN to TSMAX)|tS|80-120|sec.|
|Temperature|TL|200°C|
|Peak Temperature|TP|230°C max|
|Ramp-up rate|RUP|3°C/sec max.|
|Ramp-down rate|RDOWN|6°C/sec max.|
|Time within 5°C|of Peak Temperature|tP|10|sec.|
|Time|t[25°C]|to Peak Temperature|t[25°C]|to Peak|130|sec.|
|Time|tL|20-40|sec.|
**----- End of picture text -----**
**ENVIRONMENTAL**
**PARAMETER VALUE** MOISTURE SENSITIVITY LEVEL 1 RoHS-2 5/6 COMPLIANT, exemption 7c REACH SVHC COMPLIANT Compliant HALOGEN-FREE COMPLIANT ESD CLASSIFICATION LEVEL N/A ~~——,~~ TERMINATION FINISH Sn **APPROVAL** DRAWN BY: KJackson, April 13, 2016 APPROVED BY: KJackson, April 13, 2016 ~~—~~ REVISION: A, Initial Release
RALTRON ELECTRONICS 10400 N.W . 33[r d ] STREET Miami, Florida 33172 U.S.A. Telephone: +1-305-593-6033 Fax: +1-305-594-3973 e-mail: sales@raltron.com web site: http://www.raltron.com
## Links
- [View this product on Novapart](https://novapart.co/products/SMR-4.000-B/resonator-smr-series-4-mhz-05-03-30-ohm)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/raltron/smr-4-000-b/ceramic-resonator-4mhz-smd-30/dp/4165838)
---
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