1.5KE12CA-B Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The 1.5KE12CA-B is a bidirectional Zener transient voltage suppressor diode manufactured by Diodes Incorporated, designed for general-purpose overvoltage protection in through-hole applications. This component features a 10.2V reverse standoff voltage, 16.7V maximum clamping voltage, and 1500W peak pulse power rating in a DO-201 axial package. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for continued system support and new designs.

Substiute Parts

1.5KE12CA-B

Diodes IncorporatedIn Stock: 11751.5KE12CA-B Datasheet

Current PartRFQ

1V5KE12CA

Taiwan Semiconductor CorporationIn Stock: 10471V5KE12CA Datasheet

DirectRFQ

1.5KE12CA

Taiwan Semiconductor CorporationIn Stock: 124581.5KE12CA Datasheet

MFR RecommendedRFQ

1.5KE12CA

Taiwan Semiconductor CorporationIn Stock: 124581.5KE12CA Datasheet

MFR RecommendedRFQ

1.5KE12CA-B

Littelfuse Inc.In Stock: 9041.5KE12CA-B Datasheet

MFR RecommendedRFQ

1.5KE12CA-TP

Micro Commercial CoIn Stock: 11291.5KE12CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1.5KE12CA-B is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 10.2V
• Voltage - Breakdown (Min): 11.4V
• Voltage - Clamping (Max) @ Ipp: 16.7V
• Current - Peak Pulse (10/1000µs): 90A minimum
• Power - Peak Pulse: 1500W
• Operating Temperature Range: -55°C to 175°C (TJ)
• Mounting Type: Through Hole
• Package / Case: DO-201 series (DO-201AA, DO-201AD, DO-201AE)
• Type: Zener, Bidirectional
• RoHS Status: ROHS3 Compliant

All identified substitute parts maintain these electrical specifications within the allowed tolerance range. Peak pulse current values of 90A, 91A, and 94A are functionally equivalent for this application category. Packaging variants (DO-201AA, DO-201AD, DO-201AE) are mechanically and electrically interchangeable in through-hole PCB designs.

Parameter Comparison

Engineering Selection Recommendations

All five parts listed maintain electrical and mechanical equivalence for the 1.5KE12CA-B application. Selection should prioritize active product status and regulatory compliance:

Primary Recommendation: 1.5KE12CA (Taiwan Semiconductor Corporation) - Active product status with highest inventory availability (12400 pcs), ROHS3 compliant, REACH unaffected, and identical electrical specifications including 94A peak pulse current.

Secondary Options: 1.5KE12CA-B (Littelfuse Inc.) and 1.5KE12CA-TP (Micro Commercial Co) are active alternatives with equivalent performance. The Littelfuse variant offers established supply chain presence. The MCC variant includes automotive-grade qualification and telecom application certification.

Alternative: 1V5KE12CA (Taiwan Semiconductor Corporation) provides active status with equivalent specifications, available in DO-201AD packaging variant.

The original 1.5KE12CA-B (Diodes Incorporated) is obsolete and should not be specified for new designs. Existing inventory may be used for legacy system maintenance only.

Frequently Asked Questions (FAQ)

Q: Can I use 1.5KE12CA-TP as a direct replacement for 1.5KE12CA-B?

A: Yes. Both parts maintain identical voltage specifications (10.2V standoff, 16.7V clamping), equivalent peak pulse current (91A vs. 90A), and identical 1500W power rating. The DO-201AE package is mechanically compatible with DO-201AA through-hole PCB footprints. The automotive-grade qualification of the MCC variant provides additional robustness for demanding environments.

Q: What is the difference between DO-201AA, DO-201AD, and DO-201AE packages?

A: All three are axial through-hole packages with identical electrical performance and mechanical pin spacing. They are interchangeable in standard through-hole PCB designs. Package designation differences reflect manufacturing process variations between suppliers but do not affect circuit functionality.

Q: Why does 1.5KE12CA show 94A peak pulse current instead of 90A?

A: Peak pulse current values of 90A, 91A, and 94A are functionally equivalent for this TVS diode category. All values fall within the acceptable performance envelope for the 1.5KE12 series and maintain the specified 16.7V clamping voltage and 1500W power dissipation. Selection between these variants does not require design modification.

Q: Is REACH compliance important for my application?

A: REACH compliance status depends on your end-market requirements. The original 1.5KE12CA-B is REACH Affected. All active substitute parts (Taiwan Semiconductor, Littelfuse, and MCC variants) are REACH Unaffected, providing regulatory advantage for EU market applications and global supply chain flexibility.

Q: Can I use the 1V5KE12CA variant?

A: Yes. The 1V5KE12CA maintains all critical electrical parameters and is available in active product status. It is supplied in DO-201AD packaging, which is mechanically compatible with standard through-hole designs. This variant offers an alternative sourcing option with 954 pcs current inventory.