CR1100SC Equivalent & Substitute Parts

Part Overview

The CR1100SC is a 90V off-state Transient Voltage Suppressor (TVS) thyristor manufactured by Littelfuse Inc., housed in a DO-214AA (SMB) surface mount package. This component is designed for transient voltage protection applications requiring 250A peak pulse current capability at 8/20µs pulse width. The CR1100SC is currently classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing system support and new designs.

Substiute Parts

CR1100SC

Littelfuse Inc.In Stock: 1139CR1100SC Datasheet

Current PartRFQ

P1100SCLRP

Littelfuse Inc.In Stock: 2762P1100SCLRP Datasheet

MFR RecommendedRFQ

P1100SCMCLRP

LittelfuseIn Stock: 1257P1100SCMCLRP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CR1100SC is determined by strict electrical and mechanical parameter alignment. The critical parameters governing substitutability are:

• Voltage - Off State: 90V (exact match required)
• Voltage - Breakover: 130V (exact match required)
• Current - Hold (Ih): 150mA (exact match required)
• Package / Case: DO-214AA, SMB (exact match required)
• Mounting Type: Surface Mount (exact match required)

The identified substitute parts P1100SCLRP and P1100SCMCLRP both satisfy these core electrical and mechanical requirements. Both alternatives are manufactured by Littelfuse Inc. and maintain the same voltage ratings, hold current specification, and physical package format. The primary differences between substitutes relate to current handling capacity (400A vs. 250A peak pulse at 8/20µs), on-state voltage variance (4V or 5V), capacitance values, and packaging format (Cut Tape & Digi-Reel versus Tape & Reel). These differences do not preclude substitution when the application circuit can accommodate the enhanced current rating and minor electrical parameter variations.

Parameter Comparison

Engineering Selection Recommendations

Both P1100SCLRP and P1100SCMCLRP are active, production-status alternatives to the obsolete CR1100SC. Both substitute parts achieve ROHS3 compliance, addressing regulatory requirements that the original CR1100SC does not meet. The selection between P1100SCLRP and P1100SCMCLRP depends on packaging requirements: P1100SCLRP is supplied in Cut Tape & Digi-Reel format, while P1100SCMCLRP is supplied in Tape & Reel format.

From an electrical standpoint, both alternatives provide enhanced current handling (400A peak pulse at 8/20µs versus 250A), which represents a performance improvement over the original part. The on-state voltage differs slightly between alternatives (4V for P1100SCLRP, 5V for P1100SCMCLRP), with P1100SCMCLRP matching the original specification. Capacitance values vary (115pF and 70pF respectively) but remain within acceptable ranges for TVS thyristor applications.

Frequently Asked Questions (FAQ)

Q: Can P1100SCLRP and P1100SCMCLRP be used interchangeably with CR1100SC?

A: Both parts satisfy the core electrical and mechanical substitution criteria: identical off-state voltage (90V), breakover voltage (130V), hold current (150mA), and package format (DO-214AA, SMB). The primary differences are enhanced peak pulse current ratings (400A versus 250A) and minor variations in on-state voltage and capacitance. Interchangeability depends on circuit design margins and whether the application can accommodate these parameter variations.

Q: What is the primary reason for substituting CR1100SC?

A: The CR1100SC is classified as obsolete. P1100SCLRP and P1100SCMCLRP are active production parts, ensuring long-term availability and supply chain continuity. Both alternatives also achieve ROHS3 compliance, addressing regulatory requirements.

Q: How do the packaging formats differ between P1100SCLRP and P1100SCMCLRP?

A: P1100SCLRP is supplied in Cut Tape & Digi-Reel packaging, suitable for automated pick-and-place assembly with reel-based handling. P1100SCMCLRP is supplied in Tape & Reel format, also compatible with standard surface mount assembly equipment. Selection depends on manufacturing process requirements and inventory management preferences.

Q: Are there electrical performance differences between the substitute parts?

A: Both substitutes maintain identical voltage ratings (90V off-state, 130V breakover) and hold current (150mA). P1100SCLRP features 4V on-state voltage and 115pF capacitance, while P1100SCMCLRP features 5V on-state voltage and 70pF capacitance. The enhanced peak pulse current rating (400A) in both alternatives represents improved transient protection capability compared to the original 250A specification.

Q: Do the substitute parts meet current regulatory requirements?

A: Yes. Both P1100SCLRP and P1100SCMCLRP are ROHS3 compliant, whereas the original CR1100SC is RoHS non-compliant. Both alternatives maintain MSL 1 (Unlimited) moisture sensitivity classification and EAR99 export control status.