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3. Current Transfer Ratio (CTR) Rank, Trigger LED Current (IFT) Rank and Markings
Transistor photocouplers are ranked for CTR and SCR, and Triac photocouplers and Photorelays
are ranked for IFT. These rankings are shown in the table below.
3.1 CTR Rank and Markings
(○: available, △: call Toshiba)
Rank
Device A or
none YG GB Y GR BL GRL GRH
Marking
group
TLP120 ○ ○ △ ②
TLP121 ○ ○ ○ ○ △ △ ①
TLP180 ○ ○ ①
TLP181 ○ ○ ○ ○ ○ △ △ ①
TLP280 ○ ○ ①
TLP280-4 ○ ○ ②
TLP281 ○ ○ ○ ○ ○ ①
TLP281-4 ○ ○ ②
TLP321 ○ ○ △ ①
TLP321-2/-3/-4 ○ ○ ②
TLP521-1 ○ ○ ○ ○ ○ ○ ○ ○ ①
TLP521-2 ○ ○ ○ ○ ②
TLP521-4 ○ ○ △ ②
TLP531/532 ○ ○ ○ △ ○ ○ △ △ ①
TLP620 ○ ○ ○ ②
TLP620-2 ○ ○ △ ②
TLP620-4 ○ ○ ②
TLP621 ○ ○ ○ ○ ○ ○ ○ ○ ①
TLP621-2 ○ ○ ○ △ ②
TLP621-4 ○ ○ △ ②
TLP630 ○ ○ ②
TLP631/632 ○ ○ ○ △ ①
TLP731/732 ○ ○ ○ △ △ ①
TLP733F/734F ○ ○ ○ △ △ ①
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Marking Group ①
①①
①
Rank CTR CTR Rank Mark
A or None 50 to 600% Blank, Y, Y■, G, G■, B, B■, GB
YG 50 to 300% Y, Y■, G, G■
GB 100 to 600% GB, G, G■, B, B■
Y 50 to 150% Y, Y■
GR 100 to 300% G, G■
BL 200 to 600% B, B■
GRL 100 to 200% G
GRH 150 to 300% G■
Marking Group ②
②②
②
Rank CTR CTR Rank Mark
A or None 50 to 600% Blank, YG, GB, GR, BL
GB 100 to 600% GB, GR, BL
GR 100 to 300% GR
BL 200 to 600% BL
3.2 IFT Rank and Markings
Rank IFT IFT Rank Mark
None IFT max Blank, T7, T5
IFT7 7 mA max T7, T5
IFT5 5 mA max T5
IFT2 (Note6) 2 mA max T2
Note6: Only photorelay
3.3 Ordering Information
To order photocouplers with rank selection, add rank name as a suffix to the standard part number.
Examples:
TLP181 (GR), TLP560G (IFT7)
3.4 Safety Standard Certification
Use the Toshiba standard part numbers, without suffix, when applying for safety standards
certification.
Example:
TLP621 (GR) → TLP621
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3.5 Marking Examples
3.5.1 For 1-ch Devices in DIP 4 pin and Mini-Flat Packages
3.5.2 Others
3.5.3 TLP421
Label example
TYPE TLP421
ADD.C (D4-GR) Q’TY PCS.
NOTE
Lot No.
Pin No.1
or
TLP521-2 TLP521-2
Ex: TLP521-2: TLP521-2
TLP3063: TLP3063
Device Name
CTR or IFT rank mark
TLP
P
Lot No.
Device name, without “TL”
CTR or IFT rank mark
Pin No.1
TLP521-1
Ex: TLP626: P626,
TLP521-1: P521 P521
or
Monthly Lot No.
Pin No.1
Device Name
CTR rank mark
P421
Lot No.
