SMR-4.000-B

Resonator, SMR Series, 4 MHz, ± 0.5%, ± 0.3%, 30 ohm

⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.

Manufacturer: RALTRON
Product type: Resonators
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

Delivery and price
Units per pack	2000
Price	0.165 €
Current stock	1000+
Lead time	30 days

Datasheet

**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 -----**<br>
||||||||
|---|---|---|---|---|---|---|
|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 -----**<br>


 **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

Updated at June 9, 2026

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