P0640SB Equivalent & Substitute Parts

Part Overview

The P0640SB is a 58V off-state, 250A peak pulse TVS thyristor manufactured by Littelfuse Inc. in the DO-214AA (SMB) package. This component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The part operates within the SIDACtor® series and provides transient voltage suppression for circuit protection applications.

Substiute Parts

P0640SB

Littelfuse Inc.In Stock: 152854P0640SB Datasheet

Current PartRFQ

P0640SBLRP

Littelfuse Inc.In Stock: 21319P0640SBLRP Datasheet

DirectRFQ

SMP100LC-65

STMicroelectronicsIn Stock: 55194SMP100LC-65 Datasheet

MFR RecommendedRFQ

TISP4070H3BJR-S

Bourns Inc.In Stock: 5247TISP4070H3BJR-S Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P0640SB are selected based on electrical and mechanical compatibility within the TVS thyristor category. The primary substitution criteria are:

Critical Parameters for Substitution:

• Off-state voltage rating (58V nominal)
• Peak pulse current capability (minimum 250A at 8/20µs)
• Hold current (150mA)
• Package compatibility (DO-214AA, SMB surface mount)
• Single-element configuration

Substitution Categories:

Direct Manufacturer Equivalent: P0640SBLRP maintains identical electrical specifications to the P0640SB with the same 58V off-state voltage, 250A peak pulse current, and 4V on-state voltage. The primary difference is packaging format (Tape & Reel) and active product status.

Cross-Manufacturer Alternatives: SMP100LC-65 and TISP4070H3BJR-S provide functional equivalence with allowable parameter variations. These parts maintain the 150mA hold current requirement and DO-214AA package format while operating at comparable voltage and current ratings within acceptable engineering tolerances for TVS thyristor applications.

Parameter Comparison

Engineering Selection Recommendations

P0640SBLRP is the primary substitute for P0640SB applications. This part is manufactured by Littelfuse Inc. and provides identical electrical specifications with active product status and ROHS3 compliance. The only functional difference is packaging format (Tape & Reel versus bulk). This substitute is suitable for direct replacement in new designs and production.

SMP100LC-65 (STMicroelectronics) and TISP4070H3BJR-S (Bourns Inc.) are cross-manufacturer alternatives. Both parts maintain the 150mA hold current and DO-214AA package format. SMP100LC-65 offers higher peak pulse current capability (400A) and slightly elevated off-state voltage (65V). TISP4070H3BJR-S provides 300A peak pulse current with matching 58V off-state voltage. Both alternatives are ROHS3 compliant and carry active product status. Selection between these alternatives depends on specific circuit requirements for voltage and current headroom.

Frequently Asked Questions (FAQ)

Q: Can P0640SBLRP directly replace P0640SB in existing designs?

A: Yes. P0640SBLRP maintains identical electrical specifications (58V off-state, 250A peak pulse, 4V on-state, 150mA hold current) and package format (DO-214AA, SMB). The primary difference is packaging method (Tape & Reel). Both parts are pin-compatible and functionally equivalent.

Q: What are the key differences between P0640SB and SMP100LC-65?

A: SMP100LC-65 operates at 65V off-state voltage compared to 58V for P0640SB, with a higher breakover voltage of 85V versus 77V. Peak pulse current is increased to 400A. These parameters represent acceptable variations for TVS thyristor substitution. The 150mA hold current remains identical. Both use DO-214AA packaging.

Q: Is TISP4070H3BJR-S suitable for P0640SB replacement?

A: TISP4070H3BJR-S is suitable for applications requiring 58V off-state voltage operation. It provides 300A peak pulse current (versus 250A for P0640SB) and maintains the 150mA hold current requirement. On-state voltage is 3V compared to 4V. Package format is identical (DO-214AA, SMB).

Q: What compliance certifications should I verify for new designs?

A: P0640SB is RoHS non-compliant. All active substitutes (P0640SBLRP, SMP100LC-65, TISP4070H3BJR-S) are ROHS3 compliant. For new designs, use ROHS3-compliant alternatives. SMP100LC-65 is REACH unaffected; P0640SBLRP and TISP4070H3BJR-S are REACH affected.

Q: Are there packaging format options for these substitutes?

A: P0640SBLRP is available in Tape & Reel (TR) format. SMP100LC-65 is available in Cut Tape (CT) and Digi-Reel® formats. TISP4070H3BJR-S is available in Tape & Reel (TR) format. All maintain identical electrical performance across packaging options.

Q: How do capacitance differences affect substitution?

A: P0640SB has 80pF capacitance. SMP100LC-65 has 90pF and TISP4070H3BJR-S has 140pF. Capacitance variations within this range are acceptable for TVS thyristor applications and do not prevent substitution. Circuit-specific requirements may favor lower or higher capacitance depending on frequency response needs.