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Ordering number:EN4581
NPN Epitaxial Planar Silicon Transistor
2SC4861
UHF Converter,
Local Oscillator Applications
Features
· High cutoff frequency : fT=6.5GHz typ.
· High gain : S21e2=11.5dB typ (f=1GHz).
· Small Cob : NF=0.65pF typ.
Package Dimensions
unit:mm
2018B
[2SC4861]
0.4
3
0.16
0~0.1
1 0.95 0.95 2
1.9
2.9
Specifications
Absolute Maximum Ratings at Ta = 25˚C
Parameter
Symbol
Collector-to-Base Voltage
Collector-to-Emitter Voltage
Emitter-to-Base Voltage
Collector Current
Collector Dissipation
Junction Temperature
Storage Temperature
VCBO
VCEO
VEBO
IC
PC
Tj
Tstg
Electrical Characteristics at Ta = 25˚C
Conditions
Parameter
Symbol
Conditions
Collector Cutoff Current
Emitter Cutoff Current
DC Current Gain
Gain-Bandwidth Product
Output Capacitance
Forward Transfer Gain
Noise Figure
ICBO
IEBO
hFE
fT
Cob
| S21e |2
NF
VCB=10V, IE=0
VEB=1V, IC=0
VCE=5V, IC=5mA
VCE=5V, IC=5mA
VCB=10V, f=1MHz
VCE=5V, IC=5mA, f=1GHz
VCE=5V, IC=5mA, f=1GHz
* : The 2SC4861 is classified by 5mA hFE as follows :
Marking : EN
hFE rank : 3, 4, 5
60 3 120
90 4 180 135 5 270
1 : Base
2 : Emitter
3 : Collector
SANYO : CP
Ratings
20
10
2
30
200
150
–55 to +150
Unit
V
V
V
mA
mW
˚C
˚C
Ratings
min typ
60*
6.5
0.65
8 11.5
2.2
max
1.0
10
270*
1.1
4.0
Unit
µA
µA
GHz
pF
dB
dB
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges,or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquaters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
12099HA (KT)/41894HO (KOTO) AX-9948 No.4581–1/4

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2SC4861
No.4581–2/4

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S parameter
2SC4861
No.4581–3/4

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S parameter (Common emitter)
VCE=5V, IC=2mA, ZO=50
Freq (MHz)
200
| S11 |
0.868
S11
–25.9
400
0.737
–46.6
600
0.604
–64.1
800
0.503
–78.5
1000
0.420
–91.5
1200
0.367
–103.8
1400
0.312
–115.4
1600
0.272
–128.6
1800
0.254
–140.6
2000
0.232
–150.6
VCE=5V, IC=5mA, ZO=50
Freq (MHz)
| S11 |
200 0.714
400 0.508
600 0.378
800 0.294
1000
0.245
1200
0.211
1400
0.185
1600
0.173
1800
0.180
2000
0.174
S11
–41.8
–67.9
–86.7
–101.5
–116.0
–130.0
–145.8
–158.5
–172.1
178.9
2SC4861
| S21 |
5.790
4.868
4.170
3.570
3.117
2.731
2.457
2.232
2.042
1.906
S21
153.2
133.9
118.7
106.4
96.2
87.6
79.9
72.5
67.0
61.5
| S12 |
0.048
0.084
0.107
0.125
0.138
0.151
0.161
0.170
0.182
0.196
| S21 |
10.073
7.241
5.499
4.414
3.675
3.167
2.783
2.481
2.252
2.098
S21
140.4
118.0
104.1
93.7
85.5
78.3
72.2
66.2
61.8
57.1
| S12 |
0.042
0.066
0.084
0.100
0.116
0.132
0.148
0.164
0.181
0.201
S12
73.9
62.5
55.8
52.0
49.9
48.8
48.6
48.9
49.4
50.2
S12
68.2
60.2
58.5
58.9
59.3
59.6
59.8
59.8
59.8
59.4
| S22 |
0.944
0.839
0.747
0.672
0.622
0.583
0.553
0.534
0.516
0.511
| S22 |
0.858
0.693
0.603
0.550
0.522
0.503
0.488
0.479
0.472
0.468
S22
–14.5
–25.6
–32.6
–37.6
–41.5
–44.9
–48.0
–51.1
–54.5
–57.2
S22
–20.7
–29.6
–32.7
–34.8
–37.5
–40.3
–43.2
–46.7
–50.3
–53.3
Specifications of any and all SANYO products described or contained herein stipulate the performance,
characteristics, and functions of the described products in the independent state, and are not guarantees
of the performance, characteristics, and functions of the described products as mounted in the customer's
products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,
the customer should always evaluate and test devices mounted in the customer's products or equipment.
SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or that could cause damage to other property. When designing equipment, adopt safety measures so
that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective
circuits and error prevention circuits for safe design, redundant design, and structural design.
In the event that any or all SANYO products(including technical data,services) described or
contained herein are controlled under any of applicable local export control laws and regulations,
such products must not be exported without obtaining the export license from the authorities
concerned in accordance with the above law.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system,
or otherwise, without the prior written permission of SANYO Electric Co., Ltd.
Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification"
for the SANYO product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only ; it is not
guaranteed for volume production. SANYO believes information herein is accurate and reliable, but
no guarantees are made or implied regarding its use or any infringements of intellectual property rights
or other rights of third parties.
This catalog provides information as of January, 1999. Specifications and information herein are subject
to change without notice.
PS No.4581–4/4