Model: B251-10-4

Quartz Crystal Unit

Properties:

Overall Length
0.780 inches
Terminal Length
0.250 inches
Overall Width
0.435 inches
Body Length
0.530 inches
Body Width
0.402 inches
Body Thickness
0.150 inches
Overall Thickness
0.183 inches
Terminal Diameter
Between 0.038 inches and 0.042 inches
Mode Of Oscillation
Third overtone and fifth overtone
Circuit Resonance
Series resonance
Specified Frequency
49.583333 megahertz
Holder Cover Material
Metal or glass
Center To Center Distance Between Terminals
0.184 mils and 0.200 centimeters
Drive Level Rating
Between 2.0 milliwatts and 1.0 milliwatts and 2.4 milliwatts
Frequency Tolerance For Operating Tempurature In Percent
-0.005/+0.005 and -0.0010/+0.0010
Equivalent Resistance Value In Ohms
30.0
Style Designator
Tube body, wire leads
NSN
5955-00-812-0971
Part Number
B251-10-4
Description
Crystal Unit,quartz
CAGE
00809

An item which consists of a quartz crystal resonator(s), suitably mounted in a holder, quartz crystal.

Part B251-10-4 NSN 5955-00-812-0971

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
00196
FIIG:
A059A0
Concept No.:
App. Key:
A
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
--
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
061700
UFC:
34580
LTL:
RATING VARIABLE
LCL:
--
WCC:
72D
TCC:
Z
SHC:
9
ACC:
Instruments/Radio

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Schedule B and Export
  • Schedule B: 8541900000
  • SITC: 77688
  • End Use: Semiconductors
  • NAICS: 334413
  • USDA: 1

Freight Class: Diode, transistor & similar semiconductor device parts

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