PolySwitch®
PTC Devices
Overcurrent Protection Device
PRODUCT: BD540-30
DOCUMENT: SCD28232
REV LETTER: C
REV DATE: JULY 26, 2016
PAGE NO.: 1 OF 2
© 2016 Littelfuse, Inc.
Specifications are subject to change without notice. littelfuse.com
Revised July 26, 2016
Specification Status: Released
Electrical Rating
Voltage: 16Vdc MAX
Current: 100A MAX
Terminal Material:
Brass H65
Thickness: 0.8mm
Tin plating thickness: 5 μm
Insulating Material:
Green color PBT
Marking:
- Manufacturer’s Mark
BD540-30 - Part ID
- Lot Number
TABLE I. DIMENSIONS:
A
B
C
D
E
F
G
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
mm
21.65
22.36
7.06
7.74
9.35
10.55
5.28
5.72
0.7
0.83
9.5
10
24.75
25.4
in*
0.852
0.880
0.278
0.305
0.368
0.415
0.208
0.225
0.028
0.033
0.374
0.394
0.974
1.000
H
I(Ref.)
J(Ref.)
K(Ref.)
L(Ref.)
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
6.05
6.65
3.4
3.6
3.4
3.6
18
18.2
18.4
18.6
0.238
0.262
0.134
0.142
0.134
0.142
0.709
0.717
0.724
0.732
*Rounded off approximation
TABLE II: PERFORMANCE RATINGS:
RESISTANCE
VALUES
TIME TO
TRIP AT
120AMPS
TRIP
CURRENT AT
Rmin
HOLD
CURRENT AT
Rmax
TRIPPED-
STATE
POWER
DISSIPATION
OHMS
AT 25°C
SECONDS
AT 25°C
AMPS
AT 25°C
AMPS
AT 25°C
WATTS AT
20°C, 14V
MIN │MAX
MAX
MAX
MIN
TYP
0.0016│0.0044
13
40
21
6.2
Reference Documents: PS300, PS400
Precedence: This specification takes precedence over documents referenced herein.
Effectivity: Reference documents shall be the issue in effect on the date of invitation or bid.
CAUTION: Operation beyond the rated voltage or current may result in rupture, electrical arcing or flame.
When using a test probe to probe either of the two test points on the top of the device, care should
be taken to avoid puncturing through the insulating material of the device, as this can result in
shorting out the terminals which can cause electrical arcing or flame.
PolySwitch®
PTC Devices
Overcurrent Protection Device
PRODUCT: BD540-30
DOCUMENT: SCD28232
REV LETTER: C
REV DATE: JULY 26, 2016
PAGE NO.: 2 OF 2
© 2016 Littelfuse, Inc.
Specifications are subject to change without notice. littelfuse.com
Revised July 26, 2016
Materials Information
ROHS Compliant ELV Compliant Pb-Free
Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product
selected for their own applications. Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation,
military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any
other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than
those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used
for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of
products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse
products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse.
