5KP16-B Transient Voltage Suppressor (TVS) Equivalent & Substitute Parts

Part Overview

The 5KP16-B is a unidirectional Zener TVS diode manufactured by Littelfuse, designed for transient voltage suppression in general-purpose applications. This component features a 16V reverse standoff voltage, 27.3V maximum clamping voltage, and 5000W peak pulse power rating in a P600 axial through-hole package. The 5KP16-B is classified as obsolete, necessitating identification of active equivalent and substitute parts that maintain electrical and mechanical compatibility for new designs and ongoing production requirements.

Substiute Parts

5KP16-B

LittelfuseIn Stock: 7855KP16-B Datasheet

Current PartRFQ

5KP16A

Littelfuse Inc.In Stock: 48195KP16A Datasheet

DirectRFQ

5KP16A-B

LittelfuseIn Stock: 8685KP16A-B Datasheet

DirectRFQ

SLD16U-017

Littelfuse Inc.In Stock: 6148SLD16U-017 Datasheet

MFR RecommendedRFQ

5KP16E3/TR13

Microchip TechnologyIn Stock: 9515KP16E3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5KP16-B is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 16V
• Voltage - Clamping (Max) @ Ipp: Must be within acceptable range for circuit protection (26V to 28.8V acceptable)
• Power - Peak Pulse: 5000W (5kW)
• Type: Zener, Unidirectional
• Operating Temperature: -55°C ~ 175°C (TJ)

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole
• Package / Case: P600, Axial
• Supplier Device Package: P600

Compliance Criteria:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into three categories: Direct Littelfuse equivalents (5KP16A, 5KP16A-B), manufacturer-recommended automotive-grade alternative (SLD16U-017), and cross-manufacturer equivalent (5KP16E3/TR13 by Microchip Technology). All substitute parts maintain identical reverse standoff voltage, package configuration, and power rating while meeting or exceeding the original specification.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: 5KP16A

The 5KP16A is the direct Littelfuse equivalent with active product status. It maintains identical electrical specifications for reverse standoff voltage (16V), power rating (5000W), and operating temperature range (-55°C ~ 175°C). The clamping voltage is 26V compared to the original 27.3V, representing a 4.8% reduction within acceptable circuit protection margins. This part is available in Cut Tape packaging with 4747 units in stock, providing supply continuity for production environments.

Secondary Recommendation: 5KP16A-B

The 5KP16A-B is functionally equivalent to 5KP16A with identical electrical parameters but supplied in Bulk packaging. This variant is suitable for high-volume manufacturing or inventory consolidation scenarios. Current inventory of 831 units supports medium-term production requirements.

Automotive-Grade Alternative: SLD16U-017

The SLD16U-017 is a manufacturer-recommended substitute with automotive-grade qualification (AEC-Q101) and REACH Affected status. This part maintains the 16V reverse standoff voltage, 26V clamping voltage, and 5000W power rating. The higher breakdown voltage minimum (18V vs. 16.88V) and automotive qualification make this suitable for applications requiring enhanced reliability or automotive compliance. Inventory of 6049 units in Cut Tape packaging provides robust supply availability.

Cross-Manufacturer Alternative: 5KP16E3/TR13

The 5KP16E3/TR13 by Microchip Technology is a cross-manufacturer equivalent maintaining all critical electrical parameters. The clamping voltage is 28.8V with a peak pulse current of 174A. This part is supplied in Tape & Reel packaging with 925 units available. Selection of this part requires confirmation of cross-manufacturer compatibility in the target application circuit.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 5KP16-B with 5KP16A in existing designs?

A: Yes. Both parts share identical reverse standoff voltage (16V), power rating (5000W), operating temperature range (-55°C ~ 175°C), and P600 axial through-hole package. The clamping voltage difference (27.3V vs. 26V) is within acceptable circuit protection tolerances for general-purpose applications.

Q: What is the difference between 5KP16A and 5KP16A-B?

A: These parts are electrically identical. The difference is packaging: 5KP16A is supplied in Cut Tape (CT) format, while 5KP16A-B is supplied in Bulk format. Selection depends on manufacturing process requirements and inventory management preferences.

Q: When should I use SLD16U-017 instead of 5KP16A?

A: Use SLD16U-017 when automotive-grade qualification (AEC-Q101) is required or when REACH compliance documentation is necessary. The electrical performance is equivalent, but the automotive qualification provides additional reliability assurance for automotive and harsh-environment applications.

Q: Is 5KP16E3/TR13 by Microchip Technology a suitable replacement?

A: Yes, provided cross-manufacturer component qualification is acceptable in your design. The part maintains the 16V reverse standoff voltage and 5000W power rating. The clamping voltage is 28.8V (higher than the original 27.3V), which may affect circuit protection characteristics. Verify compatibility with your specific circuit requirements before implementation.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (5KP16A, 5KP16A-B, SLD16U-017, and 5KP16E3/TR13) are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), matching the original 5KP16-B specifications.

Q: What packaging options are available for these substitutes?

A: 5KP16A is available in Cut Tape (CT); 5KP16A-B is available in Bulk; SLD16U-017 is available in Cut Tape (CT); 5KP16E3/TR13 is available in Tape & Reel (TR). Select based on your manufacturing process and volume requirements.

Q: Can I mix different substitute parts in the same production run?

A: All substitute parts are mechanically and electrically compatible within the specified parameter ranges. However, design documentation and bill of materials should specify a single approved part number to maintain consistency and traceability in production and field service environments.