STTH2R6 High efficiency ultrafast diode Features Very low conduction losses Negligible switching losses Low forward and reverse recovery times High junction temperature Description A K The STTH2R6 uses ST Turbo 2 6 V planar Pt doping technology. It is specially suited for switching mode base drive and transistor circuits. Packaged in axial, SMA, SMB and SMC, this device is intended for use in high frequency inverters, free wheeling and polarity protection. DO-41 STTH2R6 SMA STTH2R6A SMB STTH2R6U SMC STTH2R6S Table 1. Symbol Device summary Value I F(AV) V RRM 2 A 6 V T j 175 C V F (typ) 1. V t rr (typ) 35 ns December 29 Doc ID 1757 Rev 4 1/1 www.st.com 1
Characteristics STTH2R6 1 Characteristics Table 2. Absolute ratings (limiting values) Symbol Parameter Value Unit V RRM Repetitive peak reverse voltage 6 V I F(RMS) Forward rms current 7 A I F(AV) Average forward current δ =.5 I FSM Surge non repetitive forward current DO-41 T L = 7 C SMA T L = 85 C SMB T L = 1 C SMC T L = 115 C DO-41 SMA / SMB / SMC t p = 1ms sinusoidal 2 A T stg Storage temperature range -65 to + 175 C T j Operating junction temperature range -4 to + 175 C Table 3. Thermal resistance Symbol Parameter Maximum Unit 4 3 DO-41 L = 5 mm 35 A R th(j-l) Junction to lead SMA 3 SMB 25 C/W SMC 2 Table 4. Static electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. Unit I R (1) Reverse leakage current T j = 25 C - - 2 V R = V RRM T j = 15 C - 12 85 µa V F (2) Forward voltage drop T j = 25 C - - 1.7 I F = 2 A T j = 15 C - 1. 1.25 V 1. Pulse test: t p = 5 ms, δ < 2 % 2. Pulse test: t p = 38 µs, δ < 2 % To evaluate the maximum conduction losses use the following equation: P = 1 x I F(AV) +.125 I F 2 (RMS) 2/1 Doc ID 1757 Rev 4
STTH2R6 Characteristics Table 5. Dynamic electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. Unit t rr Reverse recovery time T j = 25 C I F =.5 A, I rr =.25 A, I R = 1 A I F = 1 A, di F /dt = -5 A/µs V R = 3 V - - 3-35 5 t fr Forward recovery time I F = 2 A, - - 1 ns V FP Forward recovery voltage T j = 25 C di F /dt = 1 A/µs V FR = 1.1 x V Fmax - - 1 V ns Figure 1. Conduction losses versus average forward current Figure 2. Forward voltage drop versus forward current 3. 2.5 P(W) δ =.5 δ =.1 δ =.2 δ =.5 1 9 8 I FM(A) T j=15 C (maximum values) 2. δ = 1 7 6 T j=15 C (typical values) 1.5 5 1..5...5 1. 1.5 2. 2.5 Figure 3. 1..9.8.7.6.5.4.3.2.1. Z th(j-a) /Rth(j-a) SMA/SMB/SMC: S Single pulse I F(AV) (A) δ=tp/t Relative variation of thermal impedance junction to case versus pulse duration CU 2 = 1cm SMC 1.E-2 1.E-1 1.E+ 1.E+1 1.E+2 1.E+3 SMA t (s) p SMB DO-41 T tp 4 3 2 1..25.5.75 1. 1.25 1.5 1.75 2. 2.25 2.5 2.75 3. Figure 4. 9 8 7 6 5 4 3 2 1 I RM(A) V R=4V T j=125 C V FM(V) T j=25 C (maximum values) Peak reverse recovery current versus di F /dt (typical values) I F=.5 x IF(AV) di /dt(a/µs) F I F=2 x IF(AV) 5 1 15 2 25 3 35 4 45 5 Doc ID 1757 Rev 4 3/1
Characteristics STTH2R6 Figure 5. 3 25 2 15 1 5 t (ns) rr Reverse recovery time versus di F /dt (typical values) I F=2 x IF(AV) I F=.5 x IF(AV) di /dt(a/µs) F V R=4V T j=125 C 5 1 15 2 25 3 35 4 45 5 Figure 6. 4 35 3 25 2 15 1 5 Q (nc) rr V R=4V T j=125 C Reverse recovery charges versus di F /dt (typical values) I F=2 x IF(AV) I F=.5 x IF(AV) di /dt(a/µs) F 1 2 3 4 5 Figure 7. Relative variations of dynamic parameters versus junction temperature Figure 8. Transient peak forward voltage versus di F /dt (typical values) 1.2 3 V FP(V) 1. 25 T j=125 C.8 trr 2.6.4 IRM QRR V R=4V Reference: T j=125 C 15 1.2. T ( C) j 25 5 75 1 125 5 di /dt(a/µs) F 5 1 15 2 25 Figure 9. Forward recovery time versus di F /dt (typical values) Figure 1. Junction capacitance versus reverse voltage applied (typical values) 3 25 t (ns) fr V FR=1.1 x VF max. T j=125 C 1 C(pF) F=1MHz V OSC=3mVRMS T j=25 C 2 15 1 1 5 di /dt(a/µs) F 5 1 15 2 25 1 V (V) R 1 1 1 1 4/1 Doc ID 1757 Rev 4
STTH2R6 Characteristics Figure 11. R th(j-a) ( C/W) 12 Thermal resistance junction to ambient versus copper surface under each lead epoxy FR4, e CU = 35 µm Figure 12. 12 R th( C/W) Thermal resistance versus lead length (DO-41) 1 SMA SMB 1 Rth(j-a) 8 8 6 SMB 6 Rth(j-l) 4 4 2 S CU(cm²)..5 1. 1.5 2. 2.5 3. 3.5 4. 4.5 5. 2 L lead(mm) 5 1 15 2 25 Doc ID 1757 Rev 4 5/1
Package information STTH2R6 2 Package information Epoxy meets UL 94, V Band indicates cathode Bending method (DO-41): see Application note AN1471 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. Table 6. DO-41 (plastic) dimensions Ref. Millimeters Dimensions Inches ØD ØB Min. Max. Min. Max. A 4.7 5.2.16.25 C A C B 2.4 2.71.8.17 C 25.4 1 D.71.86.28.34 Table 7. SMA dimensions E1 Ref. Dimensions Millimeters Inches Min. Max. Min. Max. D A1 1.9 2.45.75.94 A2.5.2.2.8 E b 1.25 1.65.49.65 c.15.4.6.16 A1 D 2.25 2.9.89.114 C L A2 b E 4.8 5.35.189.211 E1 3.95 4.6.156.181 L.75 1.5.3.59 6/1 Doc ID 1757 Rev 4
STTH2R6 Package information Figure 13. Footprint (dimensions in mm) 1.4 2.63 1.4 1.64 5.43 Table 8. SMB dimensions Dimensions E1 Ref. Millimeters Inches Min. Max. Min. Max. D A1 1.9 2.45.75.96 C E L A1 A2 b A2.5.2.2.8 b 1.95 2.2.77.87 c.15.4.6.16 D 3.3 3.95.13.156 E 5.1 5.6.21.22 E1 4.5 4.6.159.181 L.75 1.5.3.59 Figure 14. Footprint (dimensions in mm) 1.62 2.6 1.62 2.18 5.84 Doc ID 1757 Rev 4 7/1
Package information STTH2R6 Table 9. SMC dimensions Dimensions Ref. Millimeters Inches E1 Min. Max. Min. Max. A1 1.9 2.45.75.96 D A2.5.2.2.8 b (1) 2.9 3.2.114.126 E c (1).15.4.6.16 D 5.55 6.25.218.246 A1 E 7.75 8.15.35.321 C E2 L A2 b E1 6.6 7.15.26.281 E2 4.4 4.7.173.185 L.75 1.5.3.59 1. Dimensions b and c apply to plated leads Figure 15. Footprint, dimensions in mm (inches) 1.54 5.11 (.61) (.21) 1.54 (.61) 3.14 (.124) 8.19 (.322) 8/1 Doc ID 1757 Rev 4
STTH2R6 Ordering information 3 Ordering information Table 1. Ordering information Order code Marking Package Weight Base qty Delivery mode STTH2R6 STTH2R6 DO-41.34 g 2 Ammopack STTH2R6RL STTH2R6 DO-41.34 g 5 Tape and reel STTH2R6A R6A SMA.68 g 5 Tape and reel STTH2R6U R6U SMB.11 g 25 Tape and reel STTH2R6S R62 SMC.243 g 25 Tape and reel 4 Revision history Table 11. Document revision history Date Revision Changes 7-Sep-24 1 First issue 1-Jun-25 2 SMC package addition. 3-Sep-29 3 Updated Table 6 package dimensions. 4-Dec-29 4 Updated Table 9 package dimensions. Doc ID 1757 Rev 4 9/1
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