# Bipolar (BJT) Single Transistor, Darlington, NPN, 350 V, 15 A, 65 W, TO-3PF, Through Hole
**URL**: https://novapart.co/products/BU941ZPFI/bipolar-bjt-single-transistor-darlington-npn-350-v
**SKU**: BU941ZPFI
**Manufacturer**: STMICROELECTRONICS
**Category**: Semiconductors - Discretes || Transistors || Bipolar Transistors || Single Bipolar Junction Transistors - BJT
**Price**: €2.9400
**Stock**: 500+
**Lead Time**: 2 days (indicative)
## Specifications
| Parameter | Value |
|---|---|
| No. Of Pins | 3Pins |
| Qualification | AEC-Q101 |
| Power Dissipation | 65W |
| Dc Current Gain Hfe | 300hFE |
| Transistor Mounting | Through Hole |
| Transistor Polarity | NPN |
| Transistor Case Style | TO-3PF |
| Dc Current Gain Hfe Min | 300hFE |
| Operating Temperature Max | 175°C |
| Continuous Collector Current | 15A |
| Collector Emitter Voltage Max | 350V |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:1084451/)
**==> picture [61 x 39] intentionally omitted <==**
## **BU941ZP BU941ZPFI**
## High voltage ignition coil driver NPN power Darlington transistors
## **Features**
- Very rugged bipolar technology
- Built in clamping Zener
- High operating junction temperature
- Fully insulated package (U.L. compliant) for easy mounting
## **Applications**
- High ruggedness electronic ignitions
**==> picture [212 x 98] intentionally omitted <==**
**----- Start of picture text -----**
3
2
1
TO-247 TO-3PF
**----- End of picture text -----**
## **Description**
The devices are bipolar Darlington transistors manufactured using Multi-Epitaxial Planar technology. They have been properly designed to be used in Automotive environment as electronic ignition power actuators.
## **Figure 1. Internal schematic diagram**
**==> picture [162 x 142] intentionally omitted <==**
**Table 1. Device summary**
|**Order code**|**Marking**|**Packages**|**Packaging**|
|---|---|---|---|
|BU941ZP|BU941ZP|TO-247|Tube|
|BU941ZPFI|BU941ZPFI|TO-3PF|Tube|
1/11
January 2008
Rev 7
_www.st.com_
**Absolute maximum ratings**
**BU941ZP BU941ZPFI**
## **1 Absolute maximum ratings**
## **Table 2. Absolute maximum ratings**
|**Table 2.**|**Absolute maximum ratings**|**Absolute maximum ratings**|||||||
|---|---|---|---|---|---|---|---|---|
|**Symbol**|**Parameter**||**Value**||||**Unit**||
||||**BU941ZP**||**BU941ZPFI**||||
|VCEO|Collector-emitter voltage (IB= 0)||350||||V||
|VEBO|Emitter-base voltage (IC= 0)||5||||V||
|IC|Collector current||15||||A||
|ICM|Collector peak current (tp< 5ms)||30||||A||
|IB|Base current||1||||A||
|IBM|Base peak current (tp< 5ms)||5||||A||
|Ptot|Total dissipation at Tc ≤25 °C||155||65||W||
|Visol|Insulation withstand voltage (RMS) from all three
leads to external heatsink||||2500||V||
|Tstg|Storage temperature||-65 to 175||-65 to 175||°C||
|TJ|Max. operating junction temperature||175||175||°C||
|**Table 3.**
**Thermal data**|||||||||
|**Symbol**||**Parameter**||**TO-247**||**TO-3PF**||**Unit**|
|Rthj-case||Thermal resistance junction-case__max||0.97||2.3||°C/W|
2/11
**Electrical characteristics**
**BU941ZP BU941ZPFI**
## **2 Electrical characteristics**
(Tcase = 25°C; unless otherwise specified)
## **Table 4. Electrical characteristics**
|**Symbol**|**Parameter**|**Test conditions**|**Min.**|**Typ.**|**Max.**|**Unit**|
|---|---|---|---|---|---|---|
|ICEO|Collector cut-off current
(IB= 0)|VCE= 300 V
VCE= 300 V Tj= 125 °C|||100
0.5|µA
mA|
|IEBO|Emitter cut-off current
(IC= 0)|VEB= 5 V|||20|mA|
|VClamp
(1)|Clamping voltage|IC= 100 mA|350||500|V|
|VCE(sat)
(1)|Collector-emitter
saturation voltage|IC= 8 A IB= 100 mA
IC= 10 A IB= 250 mA
IC= 12 A IB= 300 mA|||1.8
1.8
2|V
V
V|
|VBE(sat)
(1)|Collector-emitter base
voltage|IC= 8 A IB= 100 mA
IC= 10 A IB= 250 mA
IC= 12 A IB= 300 mA|||2.2
2.5
2.7|V
V
V|
|hFE
(1)|DC current gain|IC= 5 A VCE= 10 V|300||||
||Functional test|VCC= 24 V L = 7 mH
_Figure 13._|10|||A|
|ts
tf|Inductive load
Storage time
Fall time|VCC= 12 V L = 7 mH
VBE(off)= 0 V RBE= 47Ω
VClamp= 300 V IC= 7 A
IB1= 70 mA||15
0.5||µs
µs|
|VF|Diode forward voltage|IF= 10 A|||2.5|V|
1. Pulsed duration = 300 µs, duty cycle ≤ 1.5%.
3/11
**Electrical characteristics**
**BU941ZP BU941ZPFI**
## **2.1 Electrical characteristic (curves)**
**Figure 2. Safe operating area**
## **Figure 3. Derating curve**
**Figure 4. DC current gain**
**Figure 5. DC current gain**
**Figure 6. Collector-emitter saturation voltage**
**Figure 7. Base-emitter saturation voltage**
4/11
**Electrical characteristics**
**BU941ZP BU941ZPFI**
**Figure 8. Base-emitter saturation voltage**
**Figure 9. Base-emitter saturation voltage**
## **Figure 10. Collector-emitter saturation voltage**
## **2.2 Test circuit**
## **Figure 11. Functional test circuit**
5/11
**Electrical characteristics**
**BU941ZP BU941ZPFI**
## **Figure 12. Functional test waveforms**
**==> picture [177 x 161] intentionally omitted <==**
## **Figure 13. Switching time test circuit**
**==> picture [174 x 167] intentionally omitted <==**
6/11
**Package mechanical data**
**BU941ZP BU941ZPFI**
## **3 Package mechanical data**
In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a Lead-free second level interconnect . The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com
7/11
**Package mechanical data**
**BU941ZP BU941ZPFI**
||||||||**mm.**
**Typ**
**Max.**
5.15
2.60
1.40
2.40
3.40
0.80
20.15
15.75
5.45
14.80
4.30
18.50
3.65
5.50
5.50
**47 Mechanical data**|**mm.**
**Typ**
**Max.**
5.15
2.60
1.40
2.40
3.40
0.80
20.15
15.75
5.45
14.80
4.30
18.50
3.65
5.50
5.50
**47 Mechanical data**|**mm.**
**Typ**
**Max.**
5.15
2.60
1.40
2.40
3.40
0.80
20.15
15.75
5.45
14.80
4.30
18.50
3.65
5.50
5.50
**47 Mechanical data**|**mm.**
**Typ**
**Max.**
5.15
2.60
1.40
2.40
3.40
0.80
20.15
15.75
5.45
14.80
4.30
18.50
3.65
5.50
5.50
**47 Mechanical data**|**mm.**
**Typ**
**Max.**
5.15
2.60
1.40
2.40
3.40
0.80
20.15
15.75
5.45
14.80
4.30
18.50
3.65
5.50
5.50
**47 Mechanical data**|**mm.**
**Typ**
**Max.**
5.15
2.60
1.40
2.40
3.40
0.80
20.15
15.75
5.45
14.80
4.30
18.50
3.65
5.50
5.50
**47 Mechanical data**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|||||||**TO-2**|**47 Mechanical data**||||||
||||||||||||||
||**Dim.**|||||||||**mm.**|||
|||||**Min**||**.**||||**Typ**||**Max.**|
||A|||4.8||5||||||5.15|
||A1|||2.2||0||||||2.60|
||b|||1.0||||||||1.40|
||b1|||2.0||||||||2.40|
||b2|||3.0||||||||3.40|
||c|||0.4||0||||||0.80|
||D|||19.8||5||||||20.15|
||E|||15.4||5||||||15.75|
||e|||||||||5.45|||
||L|||14.2||0||||||14.80|
||L1|||3.7||0||||||4.30|
||L2|||||||||18.50|||
||øP|||3.5||5||||||3.65|
||øR|||4.5||0||||||5.50|
||S|||||||||5.50|||
||||||||||||||
||||||||||||||
||||||||||||||
||||||||||||||
||||||||||||||
||||||||||||||
||||||||||||||
||||||||||||||
||||||||||||||
||||||||||||||
||||||||||||||
||||||||||||||
||||||||||||||
||||||||||||||
8/11
**Package mechanical data**
**BU941ZP BU941ZPFI**
|||||||||||||||**max.**
5.70
3.20
3.50
2.20
1.10
0.95
2.20
11.50
15.70
10.20
23.20
26.70
44.40
4.70
24.70
15
2.20
4.20
3.80
7627132_C|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
||||||**TO-3PF mechanical data**||||||||||
||||||||||||||||
||||||||||||||||
||**DIM.**|||||||||**m**|**m.**||||
||||||**min.**|||||**t**|**yp**|||**max.**|
||A||||5.30|||||||||5.70|
||C||||2.80|||||||||3.20|
||D||||3.10|||||||||3.50|
||D1||||1.80|||||||||2.20|
||E||||0.80|||||||||1.10|
||F||||0.65|||||||||0.95|
||F2||||1.80|||||||||2.20|
||G||||10.30|||||||||11.50|
||G1|||||||||5.|45||||
||H||||15.30|||||||||15.70|
||L||||9.80|||||1|0|||10.20|
||L2||||22.80|||||||||23.20|
||L3||||26.30|||||||||26.70|
||L4||||43.20|||||||||44.40|
||L5||||4.30|||||||||4.70|
||L6||||24.30|||||||||24.70|
||L7||||14.60|||||||||15|
||N||||1.80|||||||||2.20|
||R||||3.80|||||||||4.20|
||Dia||||3.40|||||||||3.80|
||||||||||||||||
||||||||||||||||
|||||||||||||||7627132_C|
||||||||||||||||
||||||||||||||||
||||||||||||||||
||||||||||||||||
||||||||||||||||
||||||||||||||||
||||||||||||||||
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||||||||||||||||
||||||||||||||||
||||||||||||||||
||||||||||||||||
9/11
**Revision history**
**BU941ZP BU941ZPFI**
## **4 Revision history**
## **Table 5. Document revision history**
|**Date**|**Revision**|**Changes**|
|---|---|---|
|03-Feb-2005|6||
|22-Jan-2008|7|Package change from TO-218 to TO-247 and from ISOWATT218 to
TO-3PF.|
10/11
**BU941ZP BU941ZPFI**
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11/11
## Links
- [View this product on Novapart](https://novapart.co/products/BU941ZPFI/bipolar-bjt-single-transistor-darlington-npn-350-v)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/en-ES/stmicroelectronics/bu941zpfi/darlington-transistor-to-3pf/dp/1084451)
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