# Fast / Ultrafast Diode, 1.2 kV, 5 A, Single, 1.25 V, 48 ns, 55 A
**URL**: https://novapart.co/products/STTH512FP/fast-ultrafast-diode-12-kv-5-a-single-125-v-48-ns
**SKU**: STTH512FP
**Manufacturer**: STMICROELECTRONICS
**Category**: Semiconductors - Discretes || Diodes & Rectifiers || Fast & Ultrafast Recovery Rectifier Diodes
**Price**: €0.3530
**Stock**: 10+
**Lead Time**: 120 days (indicative)
## Description
Repetitive Reverse Voltage Vrrm Max:1.2kV; Forward Current If(AV):5A; Diode Configuration:Single; Forward Voltage VF Max:1.25V; Reverse Recovery Time trr Max:48ns; Forward Surge Current Ifsm
## Specifications
| Parameter | Value |
|---|---|
| Svhc | No SVHC (25-Jun-2025) |
| No. Of Pins | 2 Pin |
| Product Range | STTH5 |
| Qualification | - |
| Diode Case Style | TO-220FP |
| Diode Configuration | Single |
| Forward Voltage Max | 1.25V |
| Forward Surge Current | 55A |
| Reverse Recovery Time | 48ns |
| Average Forward Current | 5A |
| Operating Temperature Max | 175°C |
| Repetitive Peak Reverse Voltage | 1.2kV |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:1295281/)
## **STTH512**
## Ultrafast recovery - 1200 V diode
**Datasheet** - **production data**
## **Description**
The high quality design of this diode has produced a device with low leakage current, regularly reproducible characteristics and intrinsic ruggedness. These characteristics make it ideal for heavy duty applications that demand long term reliability.
Such demanding applications include industrial power supplies, motor control, and similar mission-critical systems that require rectification and freewheeling. These diodes also fit into auxiliary functions such as snubber, bootstrap, and demagnetization applications.
The improved performance in low leakage current, and therefore thermal runaway guard band, is an immediate competitive advantage for
this device.
|Very low conduction and switching losses
High frequency and/or high pulsed current
A|**Table 1. Device summary**
**Symbol**
**Value**
IF(AV)
5 A
VRRM
1200 V
Tj(max)
175 °C
VF(typ)
1.25 V
trr(typ)
48 ns
~~7a~~|
|---|---|
## **Features**
- Ultrafast, soft recovery
- Very low conduction and switching losses
- High frequency and/or high pulsed current operation
- High reverse voltage capability
- High junction temperature
- ECOPACK[®] 2 compliant component for DPAK on demand
- Insulated package: TO-220FPAC
- Insulated voltage: 2000 VRMS sine
February 2016
DocID12154 Rev 3
1/13
This is information on a product in full production.
_www.st.com_
**Characteristics**
**STTH512**
## **1 Characteristics**
**Table 2. Absolute ratings (limiting values at 25 °C, unless otherwise stated)**
|**Symbol**|**Parameter**|**Parameter**|**Parameter**|**Value**|**Unit**|
|---|---|---|---|---|---|
|VRRM|Repetitive peak reverse voltage|||1200|V|
|IF(RMS)|RMS forward current|TO-220AC / TO-220FPAC||30|A|
|||DPAK||10||
|IF(AV)|Average forward current,δ= 0.5, square
wave|TO-220AC / DPAK|Tc= 145° C|5|A|
|||TO-220FPAC|Tc= 105° C|||
|IFRM|Repetitive peak forward current|tp= 5 µs, F = 5 kHz square||60|A|
|IFSM|Surge non repetitive forward current|tp= 10 ms Sinusoidal||55|A|
|Tstg|Storage temperature range|||-65 to + 175|°C|
|Tj|Maximum operating junction temperature|||175|°C|
**Table 3. Thermal resistance**
|**Symbol**|**Parameter**||**Value**|**Unit**|
|---|---|---|---|---|
|Rth(j-c)|Junction to case|TO-220AC / DPAK|2.5|°C/W|
|||TO-220FPAC|5.8||
**Table 4. Static electrical characteristics**
|**Symbol**|**Parameter**|**Test conditions**|**Test conditions**|**Min.**|**Typ.**|**Max.**|**Unit**|
|---|---|---|---|---|---|---|---|
|IR
(1)|Reverse leakage current|Tj= 25° C|VR= VRRM|||5|µA|
|||Tj= 125° C|||3|30||
|VF
(2)|Forward voltage drop|Tj= 25° C|IF= 5 A|||2.20|V|
|||Tj= 125° C|||1.30|2.00||
|||Tj= 150° C|||1.25|1.90||
1. Pulse test: tp = 5 ms, δ < 2%
2. Pulse test: tp = 380 µs, δ < 2%
To evaluate the conduction losses use the following equation: P = 1.5 x IF(AV) + 0.08 IF2(RMS)
2/13
DocID12154 Rev 3
**STTH512**
**Characteristics**
**Table 5. Dynamic characteristics**
|**Symb**|**ol**
**Parameter**|**Test conditions**|**Min.**|**Typ.**|**Max.**|**Unit**|
|---|---|---|---|---|---|---|
|trr|Reverse recovery time
IF
VR
IF
VR|= 1 A, dIF/dt = -50 A/µs,
= 30 V, Tj= 25 °C|||95|ns|
|||= 1 A, dIF/dt = -100 A/µs,
= 30 V, Tj= 25 °C||48|70||
|IRM|Reverse recovery current
IF
VR|= 5 A, dIF/dt = -200 A/µs,
= 600 V, Tj= 125 °C||11|16|A|
|S|Softness factor
IF
VR|= 5 A, dIF/dt = -200 A/µs,
= 600 V, Tj= 125 °C||2|||
|tfr|Forward recovery time
IF
VF|= 5 A dIF/dt = 50 A/µs
R= 1.5 x VFmax, Tj= 25 °C|||400|ns|
|VFP|Forward recovery voltage
IF
Tj|= 5 A, dIF/dt = 50 A/µs,
= 25 °C||9.5||V|
## **Figure 1. Conduction losses versus average Figure 2. Forward voltage drop versus forward current current**
**==> picture [451 x 149] intentionally omitted <==**
**----- Start of picture text -----**
P(W) IFM(A)
13 50
12 δ = 0.1 δ = 0.2 δ = 0.5 δ = 1
45
11 δ = 0.05 T =150°C j
10 40 (typical values)
9 35
8 30
7 25 T =25j ° C
6 (maximum values)
5 20 T =150°Cj
4 15 (maximum values)
3 T
10
2
5
1 IF(AV)(A) δ =tp/T tp V FM (V)
0 0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
**----- End of picture text -----**
**==> picture [462 x 199] intentionally omitted <==**
**----- Start of picture text -----**
Figure 3. Relative variation of thermal Figure 4. Relative variation of thermal
impedance junction to case versus pulse impedance junction to case versus pulse
duration duration
Zth(j-c)/Rth(j-c) Zth(j-c)/Rth(j-c)
1.0 1.0
Single pulse Single pulse
0.9 TO-220AC 0.9 TO-220FPAC
DPAK
0.8 0.8
0.7 0.7
0.6 0.6
0.5 0.5
0.4 0.4
0.3 0.3
0.2 0.2
0.1 tp(s) 0.1 tp(s)
0.0 0.0
1.E-03 1.E-02 1.E-01 1.E+00 1.E-03 1.E-02 1.E-01 1.E+00 1.E+01
**----- End of picture text -----**
DocID12154 Rev 3
3/13
**Characteristics**
**STTH512**
## **Figure 5. Peak reverse recovery current versus Figure 6. Reverse recovery time versus dI** F **/dt dI** F **/dt (typical values) (typical values)**
**==> picture [451 x 151] intentionally omitted <==**
**----- Start of picture text -----**
IRM(A) trr(ns)
28 600
2624 VT =125°C j R=600V 550500 VT =125°CjR=600V
22 I F =2 x I F(AV) 450
20
400
18 I F =I F(AV)
16 I F =0.5 x I F(AV) 350 I F =2 x I F(AV)
14 300 IF=IF(AV) IF=0.5 x IF(AV)
12 250
10
200
8
150
6
4 100
2 dIF/dt(A/µs) 50 dI F /dt(A/µs)
0 0
0 100 200 300 400 500 0 100 200 300 400 500
**----- End of picture text -----**
**==> picture [462 x 196] intentionally omitted <==**
**----- Start of picture text -----**
Figure 7. Reverse recovery charges versus Figure 8. Softness factor versus dI F /dt (typical
dI F /dt (typical values) values)
Qrr(nC) S factor
2000 4.0
1800 V T =125 jR=600V °C 3.5 I T =125 VF j R ≤ =600V2xI°F(AV) C
1600 I F =2 x I F(AV)
1400 3.0
1200
IF=IF(AV) 2.5
1000 IF=0.5 x IF(AV)
2.0
800
600 1.5
400
1.0
200 dI F /dt(A/µs) dI F /dt(A/µs)
0 0.5
0 100 200 300 400 500 0 100 200 300 400 500
**----- End of picture text -----**
**==> picture [462 x 196] intentionally omitted <==**
**----- Start of picture text -----**
Figure 9. Relative variations of dynamic Figure 10. Transient peak forward voltage
parameters versus junction temperature versus dI F /dt (typical values)
VFP(V)
2.252.00 Reference: T =125°CV IF R =I =600 F(AV) j V 5045 IT =125°C F j=I F(AV)
1.75 S factor 40
1.50 35
1.25 30
1.00 25
0.75 trr 20
IRM
15
0.50
0.25 QRR T (°C)j 105
0.00 dIF/dt(A/µs)
25 50 75 100 125 0
0 50 100 150 200 250 300
**----- End of picture text -----**
4/13
DocID12154 Rev 3
**STTH512**
**Characteristics**
**==> picture [455 x 183] intentionally omitted <==**
**----- Start of picture text -----**
Figure 11. Forward recovery time versus Figure 12. Junction capacitance versus reverse
dI F /dt (typical values) voltage applied (typical values)
tfr(ns) C(pF)
700 100
IF=IF(AV) F=1MHz
V FR =1.5 x V T =125°Cj F max. VOSCT =25=30mVj ° C RMS
600 BERR as a ITT]
PCCP |} esse
500
ACEP PEELE SEH
10
400 NCEEa |ee
300 FECCCCOCED EEE! | EERee
dIF/dt(A/µs) VR(V)
200 CCCEEEEEePOO EEEEEEcorey} 1 LT LETH Te PvETTTT Ths
0 50 100 150 200 250 300 350 400 450 500 1 10 100 1000
**----- End of picture text -----**
## **Figure 13. Thermal resistance junction to ambient versus copper surface under tab**
DocID12154 Rev 3
5/13
**STTH512**
**Package information**
## **2 Package information**
- Epoxy meets UL94, V0
- Cooling method: by conduction (C)
- Recommended torque values: 0.55 N·m for TO-220AC and TO-220FPAC
- Maximum torque value: 0.7 N·m for TO-220AC and TO-220FPAC
In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK[®] packages, depending on their level of environmental compliance. ECOPACK[®] specifications, grade definitions and product status are available at: _www.st.com_ . ECOPACK[®] is an ST trademark.
## **2.1 TO-220AC package information**
## **Figure 14. TO-220AC package outline**
**==> picture [314 x 315] intentionally omitted <==**
**----- Start of picture text -----**
H2 A
Ø I C
L5
L7
L6
L2
D
F1 L9
L4
F
M
E
G
**----- End of picture text -----**
6/13
DocID12154 Rev 3
**STTH512**
**Package information**
**Table 6. TO-220AC package mechanical data**
||**Table 6. TO-220ACpackage mechanical data**|**Table 6. TO-220ACpackage mechanical data**|**Table 6. TO-220ACpackage mechanical data**|**Table 6. TO-220ACpackage mechanical data**|**Table 6. TO-220ACpackage mechanical data**|**Table 6. TO-220ACpackage mechanical data**|
|---|---|---|---|---|---|---|
|**Ref.**|**Dimensions**||||||
||**Millimeters**|||**Inches**|||
||**Min.**|**Typ.**|**Max.**|**Min.**|**Typ.**|**Max.**|
|A|4.40||4.60|0.173||0.181|
|C|1.23||1.32|0.048||0.051|
|D|2.40||2.72|0.094||0.107|
|E|0.49||0.70|0.019||0.027|
|F|0.61||0.88|0.024||0.034|
|F1|1.14||1.70|0.044||0.066|
|G|4.95||5.15|0.194||0.202|
|H2|10.00||10.40|0.393||0.409|
|L2||16.40 typ.|||0.645 typ.||
|L4|13.00||14.00|0.511||0.551|
|L5|2.65||2.95|0.104||0.116|
|L6|15.25||15.75|0.600||0.620|
|L7|6.20||6.60|0.244||0.259|
|L9|3.50||3.93|0.137||0.154|
|M||2.60 typ.|||0.102 typ.||
|Diam. I|3.75||3.85|0.147||0.151|
DocID12154 Rev 3
7/13
**STTH512**
**Package information**
## **2.2 TO-220FPAC package information**
## **Figure 15. TO-220FPAC package outline**
**==> picture [368 x 435] intentionally omitted <==**
**----- Start of picture text -----**
A
H B
Dia
L6
L2 L7
L3
D
F1
L4
F
E
G1
G
**----- End of picture text -----**
8/13
DocID12154 Rev 3
**STTH512**
**Package information**
**Table 7. TO-220FPAC package mechanical data**
||**Table 7. TO-220FPACpackage mechanical data**|**Table 7. TO-220FPACpackage mechanical data**|**Table 7. TO-220FPACpackage mechanical data**|**Table 7. TO-220FPACpackage mechanical data**|**Table 7. TO-220FPACpackage mechanical data**|**Table 7. TO-220FPACpackage mechanical data**|
|---|---|---|---|---|---|---|
|**Ref.**|**Dimensions**||||||
||**Millimeters**|||**Inches**|||
||**Min.**|**Typ.**|**Max.**|**Min.**|**Typ.**|**Max.**|
|A|4.40||4.60|0.173||0.181|
|B|2.50||2.70|0.098||0.106|
|D|2.50||2.75|0.098||0.108|
|E|0.45||0.70|0.018||0.027|
|F|0.75||1.00|0.030||0.039|
|F1|1.15||1.70|0.045||0.067|
|G|4.95||5.20|0.195||0.205|
|G1|2.40||2.70|0.094||0.106|
|H|10.00||10.40|0.393||0.409|
|L2||16.00 Typ.|||0.630 Typ.||
|L3|28.60||30.60|1.126||1.205|
|L4|9.80||10.60|0.386||0.417|
|L6|15.90||16.40|0.626||0.646|
|L7|9.00||9.30|0.354||0.366|
|Dia.|3.00||3.20|0.118||0.126|
DocID12154 Rev 3
9/13
**STTH512**
**Package information**
## **2.3 DPAK package information**
## **Figure 16. DPAK package outline**
_Note: This package drawing may slightly differ from the physical package. However, all the specified dimensions are guaranteed._
10/13
DocID12154 Rev 3
**STTH512**
**Package information**
**Table 8. DPAK package mechanical data**
||**Table 8. DPAK package mechanical datapackage mechanical dataackage mechanical datage mechanical datae mechanical data**|**Table 8. DPAK package mechanical datapackage mechanical dataackage mechanical datage mechanical datae mechanical data**|**Table 8. DPAK package mechanical datapackage mechanical dataackage mechanical datage mechanical datae mechanical data**|**Table 8. DPAK package mechanical datapackage mechanical dataackage mechanical datage mechanical datae mechanical data**|**Table 8. DPAK package mechanical datapackage mechanical dataackage mechanical datage mechanical datae mechanical data**|**Table 8. DPAK package mechanical datapackage mechanical dataackage mechanical datage mechanical datae mechanical data**|
|---|---|---|---|---|---|---|
|**Ref.**
~~a~~|**Dimensions**
~~a~~||||||
||**Millimeters**
~~a~~
~~ee~~
~~a~~
~~eeee~~|||**Inches**
~~a~~
~~ee~~
~~ee~~
~~eee~~|||
||**Min.**
~~a~~|**Typ.**
~~ee~~|**Max.**
~~ee~~|**Min.**
~~ee~~|**Typ.**
~~ee~~|**Max.**
~~eee~~|
|A
~~a~~
~~a~~|2.18
~~a~~
~~es~~
|~~ee~~
|2.40
~~ee~~
|0.085
~~ee~~
|~~ee~~
|0.094
~~eee~~
|
|A1
~~a~~
~~a~~|0.90
~~a~~
~~es~~
|~~ee ~~
|1.10
~~ee~~
|0.035
~~ee~~
|~~ee~~
|0.043
~~eee~~
|
|A2
~~es~~|0.03
~~es~~|~~es~~|0.23
~~es~~|0.001
~~es~~|~~es~~|0.009
~~es~~|
|b
~~a ee~~|0.64
~~ee~~|~~ee~~|0.90
~~ee~~|0.025
~~ee~~|~~ee~~|0.035
~~ee~~|
|b4
~~a ee~~
~~a~~|4.95
~~ee~~
|~~ee~~
|5.46
~~ee~~
|0.194
~~ee~~
|~~ee~~
|0.214
~~ee~~
~~ee~~
|
|c
~~a~~
~~a~~|0.46
~~ee~~
|~~ee~~
|0.61
~~ee~~
|0.018
~~ee~~
|~~ee~~
|0.024
~~ee~~
~~ee~~
|
|c2
~~a~~
~~a~~|0.46
~~ee~~
~~ee~~|~~ee~~
~~ee~~|0.60
~~ee~~
~~ee~~|0.018
~~ee~~
~~ee~~|~~ee~~
~~ee~~|0.023
~~ee~~
~~ee~~
~~ee~~|
|D
~~a~~
~~a~~|5.97
~~ee~~|~~ee~~|6.22
~~ee~~|0.235
~~ee~~|~~ee~~|0.244
~~ee~~
~~ee~~|
|D1
~~ee~~|4.95
~~ee~~||5.60|0.194||0.220|
|E
~~es~~|6.35
~~es~~|~~es~~|6.73
~~es~~|0.250
~~es~~|~~es~~|0.264
~~es~~|
|E1
~~a~~|4.32||5.50|0.170||0.216|
|e
~~a~~
~~a~~|~~ee~~|2.28
~~ee~~|~~ee~~|~~ee~~|0.090
~~ee~~|~~ee~~
~~ee~~|
|e1
~~a~~
~~a~~|4.40
~~ee~~|~~ee~~|4.70
~~ee~~|0.173
~~ee~~|~~ee~~|0.185
~~ee~~
~~ee~~|
|H
~~a~~|9.35||10.40|0.368||0.409
~~ee~~|
|L
~~ee~~|1.00
~~ee~~||1.78|0.039||0.070|
|L2
~~es~~|~~es~~|~~es~~|1.27
~~es~~|~~es~~|~~es~~|0.050
~~es~~|
|L4
~~a~~|0.60||1.02|0.023||0.040|
|V2
~~es~~|-8°
~~es ~~|~~ee~~|+8°
~~ee~~|-8°
~~ee~~||8°|
DocID12154 Rev 3
11/13
**Ordering information**
**STTH512**
## **3 Ordering information**
**Table 9. Ordering information**
|**Order code**|**Marking**|**Package**|**Weight**|**Base qty**|**Delivery mode**|
|---|---|---|---|---|---|
|STTH512D|STTH512D|TO-220AC|1.86 g|50|Tube|
|STTH512FP|STTH512FP|TO-220FPAC|1.9 g|50|Tube|
|STTH512B-TR|STTH512B|DPAK|0.32 g|2500|Tape and reel|
## **4 Revision history**
**Table 10. Document revision history**
|**Date**|**Revision**|**Changes**|
|---|---|---|
|02-Mar-2006|1|First issue.|
|26-Nov-2014|2|Updated DPAK package information and reformatted to current
standard.|
|24-Feb-2016|3|Updated DPAK package information and reformatted to current
standard.|
12/13
DocID12154 Rev 3
**STTH512**
## **IMPORTANT NOTICE – PLEASE READ CAREFULLY**
STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement.
Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products.
No license, express or implied, to any intellectual property right is granted by ST herein.
Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product.
ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners.
Information in this document supersedes and replaces information previously supplied in any prior versions of this document.
© 2016 STMicroelectronics – All rights reserved
DocID12154 Rev 3
13/13
## Links
- [View this product on Novapart](https://novapart.co/products/STTH512FP/fast-ultrafast-diode-12-kv-5-a-single-125-v-48-ns)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/stmicroelectronics/stth512fp/diode-ultrafast-5a-1200v/dp/1295281)
---
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