ST BTA24, BTB24, BTA25, BTA26, BTB26 User Manual

BTA24, BTB24, BTA25

BTA26, BTB26, T25

25 A standard and Snubberless™ triacs

Features

■High current triac

■Low thermal resistance with clip bonding

■High commutation (4 quadrant) or very high commutation (3 quadrant) capability

■BTA series UL1557 certified (File ref: 81734)

■Packages are RoHS (2002/95/EC) compliant

Applications

Applications include the ON/OFF function in applications such as static relays, heating regulation, induction motor starting circuits, etc., or for phase control operation in light dimmers, motor speed controllers, and silmilar.

The snubberless versions (BTA/BTB...W and T25 series) are especially recommended for use on inductive loads, due to their high commutation performances. The BTA series provides an insulated tab (rated at 2500 VRMS).

Description

Available either in through-hole or surface-mount packages, the BTA24, BTB24, BTA25, BTA26, BTB26 and T25 triac series is suitable for general purpose mains power AC switching.

	A2
G
	A1
	A2
A1	A1
A2
G	A2G
TO-220AB Insulated	TO-220AB

(BTA24) (BTB24)

A1

G A2

	A1
	A2
	G
RD91	TOP3 Insulated

(BTA25) (BTA26)

A2

		A2
A1	A2
	G	A1
		A2
		G
	D2PAK	TOP3
	(T25)	(BTB26)

Table 1.		Device summary
	Symbol		Parameter	BTA24(1)	BTB24	BTA25(1)	BTA26(1)	BTB26	T25	Unit
IT(RMS)			RMS on-state	25	25	25	25	25	25	A
			current
VDRM/VRRM			Repetitive peak	600 / 800	600 / 800	600 / 800	600(2) / 800	600	600 / 800	V
			off-state voltage
I	(Snubberless)		Triggering gate	35 / 50	35 / 50	50	35 / 50	-	35	mA
GT			current
IGT (Standard)			Triggering gate	-	50	50	50	50	-	mA
			current

1.Insulated packages

2.600 V version available only with IGT = 50 mA (Snubberless and Standard)

TM: Snubberless is a trademark of STMicroelectronics

July 2007

Rev 10

1/12

www.st.com

Characteristics

BTA24, BTB24, BTA25, BTA26, BTB26, T25

1

Characteristics

Table 2.

Absolute maximum ratings

Symbol

Parameter

Value

Unit

TOP3

Tc = 105° C

D2PAK /

Tc = 100° C

IT(RMS)

RMS on-state current (full sine wave)

TO-220AB

25

A

RD91 Ins/

Tc = 100° C

TOP3 Ins.

TO-220AB Ins.

Tc = 75° C

ITSM

Non repetitive surge peak on-state

F = 50 Hz

t = 20 ms

250

A

current (full cycle, Tj initial = 25° C)

F = 60 Hz

t = 16.7 ms

260

I²t

I²t Value for fusing

tp = 10 ms

340

A²s

dI/dt

Critical rate of rise of on-state current

F = 120 Hz

Tj = 125° C

50

A/µs

IG = 2 x IGT , tr ≤ 100 ns

VDSM/VRSM

Non repetitive surge peak off-state

tp = 10 ms

Tj = 25° C

VDRM/VRRM

V

voltage

+ 100

IGM

Peak gate current

tp = 20 µs

Tj = 125° C

4

A

PG(AV)

Average gate power dissipation

Tj = 125° C

1

W

Tstg

Storage junction temperature range

- 40 to + 150

° C

Tj

Operating junction temperature range

- 40 to + 125

Table 3.

Electrical characteristics (Tj = 25° C, unless otherwise specified), Snubberless and

logic level (3 quadrants) T25, BTA/BTB24...W, BTA25...W, BTA26...W

Symbol

Test Conditions

Quadrant

T25

BTA/BTB

Unit

T2535

CW

BW

(1)

I - II - III

MAX.

35

35

50

mA

IGT

VD = 12 V RL = 33 Ω

VGT

I - II - III

MAX.

1.3

V

VGD

VD = VDRM

RL = 3.3 kΩ

I - II - III

MIN.

0.2

V

Tj = 125° C

I (2)

I

= 500 mA

MAX.

50

50

75

mA

H

T

IL

IG = 1.2 IGT

I - III

MAX.

70

70

80

mA

II

80

80

100

dV/dt (2)

V

D

= 67 %V

DRM

gate open

T = 125° C

MIN.

500

500

1000

V/µs

j

(dI/dt)c (2)

Without snubber

T = 125° C

MIN.

13

13

22

A/ms

j

1.minimum IGT is guaranted at 5% of IGT max.

2.for both polarities of A2 referenced to A1.

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BTA24, BTB24, BTA25, BTA26, BTB26, T25									Characteristics
Table 4.	Electrical characteristics (Tj = 25° C, unless otherwise specified),
	standard (4 quadrants), BTB24...B, BTA25...B, BTA26...B, BTB26...B
Symbol				Test Conditions		Quadrant			Value	Unit
(1)						I - II - III			50
IGT	VD = 12 V			RL = 33 Ω		IV	MAX.		100	mA
VGT						ALL	MAX.		1.3	V
VGD	VD = VDRM			RL = 3.3 kΩ Tj = 125° C		ALL	MIN.		0.2	V
IH(2))	IT = 500 mA						MAX.		80	mA
IL	IG = 1.2 IGT					I - III - IV	MAX.		70	mA
						II			160
dV/dt(2)	V	D	= 67 %V	DRM	gate open	T = 125° C	MIN.		500	V/µs
						j
(dV/dt)c (2)	(dI/dt)c = 13.3 A/ms					T = 125° C	MIN.		10	V/µs
						j

1.minimum IGT is guaranted at 5% of IGT max.

2.for both polarities of A2 referenced to A1.

Table 5.		Static characteristics
Symbol				Test Conditions				Value	Unit
	(1)	ITM = 35 A	tp = 380 µs		Tj = 25° C		MAX.	1.55	V
VTM
Vt0	(1)	Threshold voltage			Tj = 125° C		MAX.	0.85	V
R	(1)	Dynamic resistance			T	= 125° C	MAX.	16	mΩ
d					j
IDRM		VDRM = VRRM			Tj = 25° C		MAX.	5	µA
IRRM					Tj = 125° C			3	mA

1. for both polarities of A2 referenced to A1.

	Table 6.	Thermal resistance
	Symbol		Parameter		Value	Unit
				TOP 3	0.6
	Rth(j-c)	Junction to case (AC)		D2PAK / TO-220AB	0.8	° C/W
				RD91 Insulated / TOP3 Insulated	0.9
				TO-220AB Insulated	1.7
			(1)S = 1 cm²	D2PAK	45
	Rth(j-a)	Junction to ambient		TOP3 / TOP3 Insulated	50	° C/W
				TO-220AB / TO-220AB Insulated	60

1. S = Copper surface under tab.

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Characteristics	BTA24, BTB24, BTA25, BTA26, BTB26, T25
Figure 1. Maximum power dissipation versus	Figure 2. RMS on-state current versus case
RMS on-state current (full cycle)	temperature (full cycle)

P(W)						IT(RMS)(A)
30						30
						25					BTB26
25
									BTA24
20						20
15						15			BTB24 / T25xx /
									BTA25 / BTA26
10						10
5						5
0		IT(RMS)(A)							TC(°C)
						0
0	5	10	15	20	25	0	25	50	75	100	125

Figure 3. D2PAK RMS on-state current versus Figure 4.	Relative variation of thermal
ambient temperature (printed	impedance versus pulse
circuit board FR4, copper	duration
thickness: 35µm) (full cycle)

IT(RMS)(A)						K=[Zth/Rth]
4.0						1E+0
3.5					D2PAK		Zth(j-c)
					(S=1cm2)
3.0
2.5						1E-1		Zth(j-a)
								BTA / BTB24 / T25
2.0
1.5						1E-2		Zth(j-a)
1.0								BTA26
0.5			Tamb(°C)						tp(s)
0.0						1E-3
0	25	50	75	100	125	1E-3	1E-2	1E-1	1E+0	1E+1	1E+2	5E+2

Figure 5. On-state characteristics	Figure 6. Surge peak on-state current
(maximum values)	versus number of cycles

ITM(A)									ITSM(A)
300									300
	Tj max.	Tj = Tj max.
	Vto = 0.85V								250
100	Rd = 16 mΩ											t=20ms
									200	Non repetitive		One cycle
										Tj initial=25°C
									150
10			Tj = 25°C.							Repetitive
									100	TC=75°C
									50
				VTM(V)						Number of cycles
1									0
0.5	1.0	1.5	2.0	2.5	3.0	3.5	4.0	4.5	1	10	100	1000

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