Passivated sensitive gate Silicon Controlled Rectifier (SCR) in a SOT428 (DPAK) surface mountable plastic package intended for use in applications requiring high bidirectional blocking voltage capability and high thermal cycling performance. These devices are intended to be interfaced directly to microcontrollers, logic integrated circuits and other low power gate trigger circuits.

Features and Benefits
  • Direct interfacing with low power drivers and microcontrollers
  • High bidirectional blocking voltage capability
  • High junction operating temperature capability
  • High thermal cycling performance
  • Planar passivated for voltage ruggedness and reliability
  • Surface mountable package
  • Very sensitive gate for logic level controls
  • General purpose switching and phase control
  • Ignition circuits, CDI for 2- and 3-wheelers
  • Motor control - e.g. small kitchen appliances
  • Protection circuits for Switched-Mode Power Supplies (SMPS)
  • Protection circuits in lighting ballasts
Package version
Package name
Product status
Tj [max]
VRRM [max]
Product Parametric
Type Number Symbol Parameter Conditions Min Typ/Nom Max Unit
BT258S-800LT VDRM repetitive peak off-state voltage       800 V
VRRM repetitive peak reverse voltage       800 V
IT(AV) average on-state current half sine wave; Tmb ≤ 135 °C     5 A
IT(RMS) RMS on-state current half sine wave; Tmb ≤ 135 °C     8 A
ITSM non-repetitive peak on-state current half sine wave; Tj(init) = 25 °C; tp = 10 ms     75 A
half sine wave; Tj(init) = 25 °C; tp = 8.3 ms     82 A
Tj junction temperature       150 °C
IGT gate trigger current VD = 12 V; IT = 0.1 A; Tj = 25 °C 20   50 µA
IL latching current VD = 12 V; IG = 0.1 A; Tj = 25 °C   0.4 10 mA
IH holding current VD = 12 V; Tj = 25 °C   0.3 6 mA
dVD/dt rate of rise of off-state voltage VDM = 536 V; Tj = 150 °C; RGK = 100 μ; (VDM = 67% of VDRM); exponential waveform 35 70   V/µs
Type number Package Packing Product status Marking Orderable part number Ordering code (12NC)
BT258S-800LT SOT428
Reel 13" Q1/T1 Volume production Standard Marking BT258S-800LT,118 9340 621 76118
Quality, reliability & chemical content
Chemical content Orderable part number Type number RoHS / RHF Leadfree conversion date MSL MSL LF
BT258S-800LT BT258S-800LT,118   BT258S-800LT LeadedH   1 1
Ordering & availability
Type number Ordering code (12NC) Orderable part number Region Distributor Order sample
BT258S-800LT 9340 621 76118 BT258S-800LT,118 NA NA  
IGT [max]
IT(RMS) [max]
ITSM [max] @ 50 Hz
VDRM [max]
Cross Reference
3P4J-Z 3P4J-ZK CR3AS-12 CR5AS-12 CR5AS-12A CR5AS-8
Orderable part number

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