Thermal Shock ..................................................... +85 °C to -40 °C, 20 times.................................... ±30 % typical resistance change
Solvent Resistance............................................... MIL-STD-202, Method 215 ................................... No change (marking still legible)
Vibration ............................................................... MIL-STD-883C, Method 2007.1,........................... No change (R
Visual/Mech. ......................................................... Verify dimensions and materials ........................... Per MF physical description
Resistance............................................................ In still air @ 23 °C ................................................. R
min
≤
R
≤
R
1max
Time to Trip........................................................... At specified current, Vmax, 23 °C......................... T
≤
max. time to trip (seconds)
Hold Current ......................................................... 30 min. at I
hold
...................................................... No trip
Trip Cycle Life....................................................... V
max
, I
max
, 100 cycles.......................................... No arcing or burning
Trip Endurance ..................................................... V
max
, 48 hours ..................................................... No arcing or burning
Solderability .......................................................... 245 °C ±5 °C, 5 seconds ...................................... 95 % min. coverage
Asia-Pacific:
Tel: +886-2 2562-4117 • Email: asiacus@bourns.com
EMEA:
Tel: +36 88 885 877 • Email: eurocus@bourns.com
The Americas:
Tel: +1-951 781-5500 • Email: americus@bourns.com
www.bourns.com
WARNING
Cancer and Reproductive Harm
www.P65Warnings.ca.gov
* RoHS Directive 2015/863, Mar 31, 2015 and Annex.
** Bourns considers a product to be “halogen free” if (a) the Bromine (Br) content is 900 ppm or less; (b) the Chlorine (Cl)
content is 900 ppm or less; and (c) the total Bromine (Br) and Chlorine (Cl) content is 1500 ppm or less.
Specifications are subject to change without notice. Users should verify actual device performance in their specific
applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last
page of this document, and at
www.bourns.com/docs/legal/disclaimer.pdf.
Applications
■
Thermal protection for USB-C 2.0, 3.0 and 3.1 cables and ports
■
Mobile device fast charging port protection
P-TCO-N Series – Polymeric Thermal Cutoff Device
Product Dimensions
A
Model
Min.
P-TCO-N350/12
P-TCO-N400/12
P-TCO-N450/12
DIMENSIONS:
Top View
A
B
Max.
Min.
Max.
Min.
C
Max.
D
Min.
Min.
E
Max.
3.00
(0.118)
3.50
(0.138)
1.40
(0.055)
1.80
(0.071)
0.60
(0.024)
1.10
(0.043)
0.25
(0.010)
0.05
(0.002)
0.45
(0.018)
MM
(INCHES)
Side View
C
Bottom View
D
E
Terminal material:
ENIG-plated terminals
Recommended Pad Layout
1.0 ± 0.05
(.039 ± .002)
1.0 ± 0.05
(.039 ± .002)
1.6 ± 0.1
(.063 ± .004)
2.0 ± 0.1
(.079 ± .004)
B
Packaging Quantity
3500 pcs. per reel
Thermal Derating Table - Ihold (Amps)
Ambient Operating Temperature
Model
-40 °C
P-TCO-N350/12
P-TCO-N400/12
P-TCO-N450/12
5.15
5.80
6.10
-20 °C
4.66
5.25
5.40
0 °C
4.13
4.65
4.70
23 °C
3.50
4.00
4.50
40 °C
2.98
3.40
3.60
50 °C
2.71
3.10
3.15
60 °C
2.49
2.65
2.70
70 °C
2.00
2.20
2.25
85 °C
1.65
1.80
1.85
How to Order
Typical Part Marking
P-TCO - N 350 / 12 - 2
Polymeric
Thermal Cutoff
Device
N = 1206 footprint
Surface Mount Component
Hold Current, Ihold
350 - 450 (3.50 Amps - 4.50 Amps)
Maximum Voltage, Vmax
12 = 12 Volts
Packaging
-2 = Tape and Reel
Packaged per EIA 481
Represents total content. Layout may vary.
PART IDENTIFICATION:
P-TCO-N350/12 = S12
P-TCO-N400/12 = U12
P-TCO-N450/12 = X12
S12
MANUFACTURING DATE CODE IS
LOCATED ON PACKING LABEL.
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at
www.bourns.com/docs/legal/disclaimer.pdf.
P-TCO-N Series – Polymeric Thermal Cutoff Device
Solder Reflow Recommendations
tp
RAMP-UP
TL
tL
CRITICAL ZONE
T L TO TP
Notes:
•
•
•
RAMP-DOWN
TP
P-TCO-N models cannot be wave soldered or hand soldered.
Please contact Bourns for soldering recommendations.
All temperatures refer to topside of the package, measured on the
package body surface.
If reflow temperatures exceed the recommended profile, devices may
not meet the published specifications.
Compatible with Pb and Pb-free solder reflow profiles.
Excess solder may cause a short circuit, especially during hand
soldering. Please refer to the Polymeric Thermal Cutoff Soldering
Recommendation guidelines.
Temperature
Ts max
•
Ts min
ts
PREHEAT
25
•
t 25 °C TO PEAK
Time
Profile Feature
Average Ramp-Up Rate (Ts
max
to T
p
)
PREHEAT:
Temperature Min. (Ts
min
)
Temperature Max. (Ts
max
)
Time (Ts
min
to Ts
max
) (ts)
TIME MAINTAINED ABOVE:
Temperature (T
L
)
Time (t
L
)
Peak Temperature (T
p
)
Time within 5 °C of Actual Peak Temperature (t
p
)
Ramp-Down Rate
Time 25 °C to Peak Temperature
3 °C / second max.
150 °C
200 °C
60~180 seconds
217 °C
60~150 seconds
260 °C
20~40 seconds
6 °C / second max.
8 minutes max.
Pb-Free Assembly
Packaging Specifications
P-TCO-N Series per EIA 481
0.6
MAX.
(.024)
1.50 +0.1 / -0
DIA.
(.059 +.004 / -0)
4.0 ± 0.10
(.157 ± .004)
2.0 ± 0.05
(.079 ± .002)
1.75 ± 0.10
(.069 ± .004)
185
MAX.
(7.283)
15.4*
MAX.
(.606)
12.0 ± 0.30
(.472 ± .012)
4.5
MAX.
(.177)
COVER
TAPE
5.50 ± 0.05
(.216 ± .002)
3.50 ± 0.10
(.138 ± .004)
1.10 ± 0.10
(.043 ± .004)
0.1
MAX.
(.004)
LEADER MIN.
390
(15.35)
50 MIN.
(1.97) HUB DIA.
4.0 ± 0.10
(.157 ± .004)
1.90 ± 0.10
(.075 ± .004)
TRAILER MIN.
160
(6.30)
10.25
TYP.
(.404)
12.4 +1 / -0*
(.488 +.039 / -0)
*MEASURED AT HUB
DIMENSIONS:
P-TCO-N SERIES, REV. A, 02/19
MM
(INCHES)
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at
www.bourns.com/docs/legal/disclaimer.pdf.
Bourns
®
Polymeric Thermal Cutoff Devices (P-TCO)
Application Notice
Users are responsible for independent and adequate evaluation of Bourns
®
Polymeric Thermal Cutoff (P-TCO) devices in the user’s
application, including the P-TCO device characteristics stated in the applicable data sheet.
•
Polymeric Thermal Cutoff devices must not be allowed to operate beyond their stated maximum ratings. Inadequate adherence
to such maximum ratings could result in damage to the P-TCO device and lead to electrical arcing and/or fire. Circuits with
inductance may generate a voltage above the rated voltage of the P-TCO devices and should be thoroughly evaluated within the
user’s application during the P-TCO selection and qualification process.
Polymeric Thermal Cutoff devices are intended to protect against adverse effects of temporary overtemperature conditions and
are not intended to serve as protective devices where such conditions are expected to be repetitive or prolonged.
As a normal function of operation, Polymeric Thermal Cutoff devices experience thermal expansion under fault conditions.
Thus, a P-TCO device must be protected against mechanical stress, and must be given adequate clearance within the user’s
application to accommodate such thermal expansion. Rigid potting materials or fixed housings or coverings that do not provide
adequate clearance should be thoroughly examined and tested by the user, and may result in the malfunction of P-TCO devices
if the thermal expansion is inhibited.
Exposure to lubricants, silicon-based oils, solvents, gels, electrolytes, acids, and other related or similar materials may adversely
affect the performance of Polymeric Thermal Cutoff devices.
Aggressive solvents may adversely affect the performance of Polymeric Thermal Cutoff devices. Conformal coating,
encapsulating, potting, molding, and sealing materials may contain aggressive solvents including but not limited to xylene and
toluene, which are known to cause adverse effects on the performance of P-TCO devices. Such aggressive solvents must be
thoroughly cured or baked to ensure complete removal from P-TCO devices to minimize the possible adverse effect on the
device.
Recommended storage conditions should be followed at all times. Such conditions can be found on the applicable data sheet
and on the Polymeric Thermal Cutoff Device Moisture/Reflow Sensitivity Classification (MSL) note:
https://www.bourns.com/
docs/RoHS-MSL/msl_ptco.pdf
•
•
•
•
•
Asia-Pacific:
Tel: +886-2 2562-4117 • Email: asiacus@bourns.com
EMEA:
Tel: +36 88 885 877 • Email: eurocus@bourns.com
The Americas:
Tel: +1-951 781-5500 • Email: americus@bourns.com
www.bourns.com
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at
www.bourns.com/docs/legal/disclaimer.pdf.
Legal Disclaimer Notice
This legal disclaimer applies to purchasers and users of Bourns
®
products manufactured by or on behalf of Bourns, Inc. and
Unless otherwise expressly indicated in writing, Bourns
®
products and data sheets relating thereto are subject to change
and complete before placing orders for Bourns
®
products.
The characteristics and parameters of a Bourns
®
product set forth in its data sheet are based on laboratory conditions, and
statements regarding the suitability of products for certain types of applications are based on Bourns’ knowledge of typical
requirements in generic applications. The characteristics and parameters of a Bourns
®
®
product with other components
the actual performance of the Bourns
®
®
®
product as meeting the requirements of a particular industry
®
of Bourns products are responsible for ensuring compliance with safety-related requirements and standards applicable to
®
Bourns
®
on a case-by-case basis, use of any Bourns
®
®
®
®
®
Bourns
®
®
standard products that are suitable for use in aircraft
®
standard
the user’s sole risk.
®
and the user for which such Bourns
®
®
custom products shall be negotiated on a case-by-case basis by Bourns
®
also apply to such Bourns custom products.
Users shall not sell, transfer, export or re-export any Bourns
®
Bourns
®
standard products shall
products and Bourns technology and technical data may not under any circumstance be
exported or re-exported to countries subject to international sanctions or embargoes. Bourns
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