1.5KE220-B Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The 1.5KE220-B is a unidirectional Zener-type transient voltage suppressor diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This through-hole component operates across a temperature range of -55°C to 175°C and is housed in a DO-201 package. The part is currently listed as obsolete, making identification of active equivalent and substitute parts essential for ongoing design support and procurement.

Substiute Parts

1.5KE220-B

Littelfuse Inc.In Stock: 6841.5KE220-B Datasheet

Current PartRFQ

1.5KE220A

Taiwan Semiconductor CorporationIn Stock: 42671.5KE220A Datasheet

DirectRFQ

1.5KE220A-B

Littelfuse Inc.In Stock: 10141.5KE220A-B Datasheet

DirectRFQ

1.5KE220A-G

Comchip TechnologyIn Stock: 11131.5KE220A-G Datasheet

MFR RecommendedRFQ

1.5KE220A-HF

Comchip TechnologyIn Stock: 8581.5KE220A-HF Datasheet

MFR RecommendedRFQ

1.5KE220A-TP

Micro Commercial CoIn Stock: 21741.5KE220A-TP Datasheet

MFR RecommendedRFQ

1V5KE220A

Taiwan Semiconductor CorporationIn Stock: 8601V5KE220A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1.5KE220-B is determined by the following critical electrical and mechanical parameters:

• Voltage Rating Class: Reverse standoff voltage of 185V and breakdown voltage minimum of 198V define the voltage protection tier
• Clamping Voltage Performance: Maximum clamping voltage at peak pulse current determines transient suppression effectiveness
• Peak Pulse Current Capability: 4.6A peak pulse current (10/1000µs waveform) establishes the surge handling capacity
• Power Dissipation: 1500W peak pulse power rating defines thermal performance under transient conditions
• Package Compatibility: DO-201 series through-hole axial packages ensure mechanical and thermal compatibility
• Temperature Operating Range: -55°C to 175°C junction temperature range supports the application environment
• Regulatory Compliance: ROHS3 compliance and EAR99 classification maintain environmental and export standards

Substitute parts must maintain electrical equivalence within the specified voltage and current parameters while preserving package form factor and thermal characteristics. All identified substitutes operate within the same 1.5KE series classification and share the DO-201 package family.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts are active products with ROHS3 compliance and EAR99 classification, providing regulatory continuity with the obsolete 1.5KE220-B. Selection among substitutes should be based on the following criteria:

1.5KE220A (Taiwan Semiconductor Corporation): Active status with full temperature range support (-55°C to 175°C). Offers 4.8A peak pulse current, exceeding the original 4.6A specification. Suitable for applications requiring maximum surge capacity within the voltage class.

1.5KE220A-B (Littelfuse Inc.): Maintains original manufacturer continuity as an active Littelfuse product. Identical electrical performance to the obsolete 1.5KE220-B with 4.6A peak pulse current. Available in bulk packaging format.

1.5KE220A-G (Comchip Technology): Active product with manufacturer recommendation status. Operates within -55°C to 150°C range, suitable for applications not requiring the full 175°C upper temperature limit. Peak pulse current of 4.57A provides near-equivalent performance.

1.5KE220A-HF (Comchip Technology): Designated high-frequency variant with identical electrical specifications to 1.5KE220A-G. Temperature range limited to -55°C to 150°C. Suitable for applications with frequency-dependent transient suppression requirements.

1.5KE220A-TP (Micro Commercial Co): Active product in cut tape packaging. Maintains full temperature range (-55°C to 175°C). Peak pulse current specification not provided in documentation; verify against application requirements before selection.

1V5KE220A (Taiwan Semiconductor Corporation): Active product in tape and reel format. Maintains full temperature range (-55°C to 175°C) with 4.6A peak pulse current matching the original specification. Suitable for high-volume automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the 1.5KE220-B be directly replaced with any of these substitute parts?

A: All identified substitutes maintain the critical electrical parameters: 185V reverse standoff voltage, 1500W peak pulse power, and DO-201 package compatibility. However, clamping voltage varies between 328V and 344.4V. The original 1.5KE220-B exhibits higher clamping voltage (344.4V) compared to most substitutes (328V). Verify that your circuit design tolerates the lower clamping voltage of substitute parts before implementation.

Q: What is the difference between the various package designations (DO-201AA, DO-201AE, DO-201AD)?

A: All variants are through-hole axial packages within the DO-201 family. DO-201AA, DO-201AE, and DO-201AD represent minor dimensional and lead configuration variations. Mechanical compatibility is maintained across these variants for standard through-hole PCB assembly. Consult component datasheets for precise lead spacing and hole diameter requirements specific to your PCB design.

Q: Why do some substitutes have a maximum operating temperature of 150°C instead of 175°C?

A: The 1.5KE220A-G and 1.5KE220A-HF are rated to 150°C junction temperature, compared to 175°C for the original and most substitutes. This represents a design variation by the manufacturer. If your application requires operation at junction temperatures between 150°C and 175°C, select substitutes with the full 175°C rating: 1.5KE220A, 1.5KE220A-B, 1.5KE220A-TP, or 1V5KE220A.

Q: What does "peak pulse current" mean, and why does 1.5KE220A-TP not specify this value?

A: Peak pulse current (10/1000µs waveform) defines the maximum surge current the TVS diode can handle during a transient event. The 1.5KE220A-TP documentation does not provide this specification. Contact the manufacturer or consult the complete datasheet before selecting this part for applications where peak pulse current verification is required.

Q: Are all substitutes suitable for automotive applications?

A: Only the 1.5KE220A from Taiwan Semiconductor Corporation carries automotive grade designation with AEC-Q101 qualification. If your application requires automotive-grade components, this part is the appropriate selection. Other substitutes are classified for general-purpose applications.

Q: What packaging format should I select for my assembly process?

A: Packaging format depends on your manufacturing process: bulk packaging (1.5KE220A-B) for manual or small-batch assembly; cut tape (1.5KE220A-TP) for semi-automated processes; tape and box (1.5KE220A-G, 1.5KE220A-HF) for standard automated assembly; tape and reel (1V5KE220A) for high-volume automated production lines.