Equivalent & Substitute Parts for 5KP250-B TVS Diode

Part Overview

The 5KP250-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for transient overvoltage protection in telecom applications. This component features a 250V reverse standoff voltage, 425V maximum clamping voltage, and 12A peak pulse current capability in a through-hole P600 axial package format.

The 5KP250-B currently holds an Obsolete product status. Identifying equivalent and substitute parts ensures design continuity and maintains supply chain reliability for applications requiring this voltage suppression specification.

Substiute Parts

5KP250-B

Littelfuse Inc.In Stock: 12455KP250-B Datasheet

Current PartRFQ

5KP250A

LittelfuseIn Stock: 11835KP250A Datasheet

DirectRFQ

5KP250A-B

Littelfuse Inc.In Stock: 10255KP250A-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 5KP250-B are identified based on electrical and mechanical parameter equivalence within the 5KP series TVS diode family. The substitution criteria are:

Electrical Parameters (Must Match):

• Voltage - Reverse Standoff (Typ): 250V
• Voltage - Breakdown (Min): 277V
• Voltage - Clamping (Max) @ Ipp: 425V
• Current - Peak Pulse (10/1000µs): 12A
• Power - Peak Pulse: 5000W

Mechanical Parameters (Must Match):

• Mounting Type: Through Hole
• Package / Case: P600, Axial
• Unidirectional Channels: 1
• Type: Zener

Allowed Variations:

• Product Status: Active substitutes are preferred over Obsolete
• Packaging Format: Tape & Reel (TR) or Bulk packaging acceptable
• RoHS Compliance: ROHS3 Compliant substitutes are acceptable

The 5KP250A and 5KP250A-B meet all electrical and mechanical equivalence criteria and are available in Active product status with improved compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 5KP250A-B

The 5KP250A-B is the recommended substitute for the obsolete 5KP250-B. This part maintains complete electrical and mechanical equivalence across all critical parameters while offering Active product status. The 5KP250A-B is supplied in Bulk packaging and carries ROHS3 compliance certification, providing improved regulatory alignment compared to the original part. Current inventory of 969 pieces supports immediate procurement.

Secondary Substitute: 5KP250A

The 5KP250A provides identical electrical and mechanical specifications and Active product status. This variant is supplied in Tape & Reel (TR) packaging format, suitable for automated assembly processes. ROHS3 compliance and REACH Unaffected status are confirmed. Current inventory of 1151 pieces is available.

Selection Criteria:

• For manual assembly or low-volume applications: Select 5KP250A-B (Bulk packaging)
• For automated assembly or high-volume production: Select 5KP250A (Tape & Reel packaging)
• For regulatory compliance: Both substitutes meet ROHS3 and EAR99 requirements

Both substitute parts are functionally interchangeable with the 5KP250-B in all circuit applications requiring 250V reverse standoff voltage and 425V clamping voltage protection.

Frequently Asked Questions (FAQ)

Q: Can 5KP250A and 5KP250A-B be used interchangeably with 5KP250-B?

A: Yes. Both substitute parts are electrically and mechanically equivalent to the 5KP250-B. The only differences are product status (Active vs. Obsolete), packaging format (Tape & Reel or Bulk), and compliance certifications (ROHS3 vs. RoHS Compliant). All three parts share identical voltage ratings, current ratings, temperature range, and P600 axial package specifications.

Q: What is the difference between 5KP250A and 5KP250A-B?

A: The electrical and mechanical specifications are identical. The difference is packaging format: 5KP250A is supplied in Tape & Reel (TR) format for automated assembly, while 5KP250A-B is supplied in Bulk format for manual assembly or component stocking. Both carry ROHS3 compliance.

Q: Why is the 5KP250-B marked as Obsolete?

A: The 5KP250-B has been superseded by the 5KP250A and 5KP250A-B variants, which offer improved compliance certifications and Active product status. Littelfuse continues to support the electrical specifications through these successor parts.

Q: Are there any performance differences between the substitute parts and the original 5KP250-B?

A: No. The 5KP250A and 5KP250A-B maintain identical electrical performance specifications: 250V reverse standoff voltage, 277V minimum breakdown voltage, 425V maximum clamping voltage, 12A peak pulse current, and 5000W peak pulse power rating. Operating temperature range (-55°C to 175°C) is also identical.

Q: Can I mix packaging formats in the same design?

A: Yes. The 5KP250A (Tape & Reel) and 5KP250A-B (Bulk) are electrically and mechanically identical. Packaging format selection depends on assembly process requirements, not circuit functionality.

Q: What compliance certifications apply to the substitute parts?

A: Both 5KP250A and 5KP250A-B carry ROHS3 compliance, REACH Unaffected status, EAR99 export classification, and HTSUS code 8541.10.0080. Moisture Sensitivity Level is 1 (Unlimited) for both parts.

Q: Is the P600 axial package the same across all three parts?

A: Yes. The 5KP250-B, 5KP250A, and 5KP250A-B all use the P600 axial through-hole package. No PCB layout or mechanical modifications are required when substituting between these parts.