BT169H,112 Equivalent & Substitute Parts

Part Overview

The BT169H,112 is a sensitive gate SCR (Silicon Controlled Rectifier) rated for 800V off-state voltage with 800mA RMS current capability in a TO-92-3 through-hole package. Manufactured by NXP USA Inc., this component is classified as obsolete, making equivalent substitutes necessary for new designs and production continuity. The part operates as a thyristor for AC switching and control applications requiring low gate trigger current and voltage characteristics.

Substiute Parts

BT169H,112

NXP USA Inc.In Stock: 958BT169H,112 Datasheet

Current PartRFQ

X0202NA 1BA2

STMicroelectronicsIn Stock: 8346X0202NA 1BA2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BT169H,112 is determined by the following critical parameters:

• Off-state voltage rating: 800V minimum required
• Gate trigger characteristics: Vgt ≤ 800mV and Igt ≤ 100µA for sensitive gate operation
• On-state current capability: RMS current rating must support application requirements
• On-state voltage drop: Vtm characteristics for power dissipation calculations
• Hold current: Ih specifications for gate pulse width requirements
• Package compatibility: TO-92-3 through-hole form factor
• SCR type: Sensitive gate classification

The X0202NA 1BA2 from STMicroelectronics qualifies as a direct substitute based on matching all critical electrical parameters within acceptable engineering tolerances and identical package specifications.

Parameter Comparison

Engineering Selection Recommendations

The X0202NA 1BA2 is suitable as a substitute for the obsolete BT169H,112 based on the following factors:

• Product Status: The X0202NA 1BA2 maintains active product status, ensuring long-term availability and supply chain continuity.
• Electrical Compatibility: All critical voltage and current parameters meet or exceed the original specification. The lower on-state voltage drop (1.45V vs 1.7V) provides improved thermal performance.
• Regulatory Compliance: Both components maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements.
• Package Equivalence: Identical TO-92-3 through-hole package enables direct PCB layout compatibility without redesign.
• Gate Characteristics: Sensitive gate classification with matching trigger voltage ensures gate drive circuit compatibility.

Frequently Asked Questions (FAQ)

Q: Can the X0202NA 1BA2 directly replace the BT169H,112 without circuit modifications?

A: Yes. The X0202NA 1BA2 maintains identical off-state voltage, gate trigger voltage, package form factor, and sensitive gate classification. The improved on-state current rating (1.25A vs 800mA) and lower on-state voltage drop provide enhanced performance margins without requiring gate drive circuit changes.

Q: What is the significance of the sensitive gate classification for substitution?

A: Sensitive gate SCRs require lower gate trigger current (Igt ≤ 200µA) compared to standard SCRs. Both the BT169H,112 and X0202NA 1BA2 share this classification, ensuring gate pulse width and drive current requirements remain consistent across substitution.

Q: Are there package considerations when substituting these components?

A: Both components use the TO-92-3 through-hole package with identical lead configuration (TO-226AA formed leads). No PCB layout modifications or mechanical redesign is required for substitution.

Q: How do the on-state voltage characteristics affect thermal design?

A: The X0202NA 1BA2 exhibits lower on-state voltage drop (1.45V maximum vs 1.7V maximum), resulting in reduced power dissipation at equivalent current levels. This improves thermal performance and may allow for reduced heatsinking requirements in existing designs.

Q: What compliance certifications apply to both components?

A: Both the BT169H,112 and X0202NA 1BA2 are ROHS3 compliant and REACH unaffected, meeting current environmental and hazardous substance regulations for electronic components.