Switching Diodes 1N6638 Series
1N6638, 1N6639, 1N6640, 1N6641, 1N6642, 1N6643,
1N6638U & US, 1N6639U & US, 1N6640U & US,
1N6641U & US 1N6642U & US, 1N6643U & US
Features
• Available in JAN, JANS, JANTX, JANTXV
per MIL‐PRF‐19500/578 & /609
• Switching Diodes
• Non‐Cavity Glass Plackage
• Category I Metallurgically Bonded
Maximum Ratings
Operating Temperature: -65°C to +175°C
Storage Temperature:
Operating Current:
Derating:
Surge Current:
-65°C to +175°C
300mA
Thermal Resistance:
(R
ӨJEC
): U & US 40 °C/W maximum at L = 0”
See Figure 6
(R
ӨJL
): Leaded 150 °C/W maximum at L = .375”
See Figure 7
Thermal Impedance: (Z
ӨJX
): 25 °C/W maximum
See Figure 5
IFSM = 2.5A, half sine wave,
PW = 8.3ms
Electrical Specifications @ TA = + 25 ºC ( Unless Otherwise Specified )
VBR @ IR
TYPES
V(pk)
μA
V(pk)
VFR
V(pk)
1N6638, U & US
1N6639, U & US
1N6640, U & US
1N6641, U & US
1N6642, U & US
1N6643, U & US
150
100
75
75
100
75
100
10
10
10
100
100
125
75
50
50
75
50
5.0
5.0
5.0
5.0
5.0
5.0
tfr
ns
20
10
10
10
20
20
VWRM
VFR / tfr @
IF = 200 mA
CT1
VR=0 V
CT2
VR=1.5 V
trr
IR1
IR = 10mA VR=VRWM
IF = 10mA TA = 150°C
ns
4.5
4.0
4.0
5.0
5.0
6.0
nA dc
35
‐
‐
‐
25
50
IR2
VR=20V
TA = 150°C
nA dc
500
100
100
100
500
500
μA dc
50
‐
‐
‐
50
75
μA dc
100
90
90
90
100
100
IR3
VR=20V
IR4
VR = VRWM
pF
2.5
2.5
2.5
3.0
5.0
5.0
pF
2.0
‐
‐
‐
2.8
2.8
VF @ IF
TYPES
V dc
(min)
1N6638, U & US
1N6639, U & US
1N6640, U & US
‐
‐
‐
0.54
0.76
0.82
0.87
‐
‐
‐
‐
‐
V dc
(max)
1.1
0.8
1.2
0.62
0.86
0.92
1.0
1.1
0.8
1.2
0.8
1.2
VF2 @ IF
TA = -55°C
V dc
(max)
1.2
‐
1.3
-
‐
‐
1.1
1.2
‐
1.2
‐
1.4
IF
mA
(pulsed)
200
10
500
1
50
100
200
200
10
100
10
100
1N6641, U & US
1N6642, U & US
1N6643, U & US
Revision Date: 2/5/2013
1
Switching Diodes 1N6638 Series
Outline Drawing
LEADED DESIGN DATA
CASE: D‐5D, Hermetically sealed glass
case, per MIL‐PRF‐19500/578 & /609
LEAD FINISH: Tin/Lead
LEAD MATERIAL: Copper clad steel
POLARITY: Cathode end is banded.
PACKAGE WEIGHT: 0.150g
U & US DESIGN DATA
CASE: D‐5D, Hermetically sealed glass
case, per MIL‐PRF‐19500/578 & /609
LEAD FINISH: Tin/Lead
END CAP MATERIAL (U, US): Copper
POLARITY: Cathode end is banded.
PACKAGE WEIGHT: 0.095g
MOUNTING SURFACE SELECTION: The
Axial Coefficient of Expansion (COE) of this
device is approximately +4PPM/°C. The
COE of the Mounting Surface System
should be selected to provide a suitable
match with this device.
NOTES:
1. Dimensions are in inches. Millimeters are given for general information only.
2. Dimension BD shall be measured at the largest diameter.
3. The specified lead diameter applies in the zone between .050 inch (1.27 mm)
from the diode body to the end of the lead. Outside of this zone lead shall not exceed BD.
4. In accordance with ASME Y14.5M, diameters are equivalent to
Φx
symbology.
5. U‐suffix parts are structurally identical to the US‐suffix parts.
2
TEL: 603-641-SEMI (7364) • metelics-sales@aeroflex.com • www.aeroflex.com/metelics
Revision Date: 2/5/2013
Switching Diodes 1N6638 Series
TEL: 603-641-SEMI (7364) • metelics-sales@aeroflex.com • www.aeroflex.com/metelics
Revision Date: 2/5/2013
3
Switching Diodes 1N6638 Series
NOTES:
1. All devices are capable of operating at
≤
TJ specified on this curve. Any parallel line to this curve will
intersect the appropriate current for the desired maximum TJ allowed.
2. Derate design curve constrained by the maximum junction temperatures and current rating specified.
(See 1.3.)
3. Derate design curve chosen at TJ
≤
150°C, where the maximum temperature of electrical test is performed.
4. Derate design curves chosen at TJ
≤
125°C, and 110°C to show current rating where most users want to
limit TJ intheir application.
4
TEL: 603-641-SEMI (7364) • metelics-sales@aeroflex.com • www.aeroflex.com/metelics
Revision Date: 2/5/2013
Switching Diodes 1N6638 Series
TEL: 603-641-SEMI (7364) • metelics-sales@aeroflex.com • www.aeroflex.com/metelics
Revision Date: 2/5/2013
5
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