P4KE36CA-B Equivalent & Substitute Parts

Part Overview

The P4KE36CA-B is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 30.8V reverse standoff voltage with a 49.9V maximum clamping voltage and 8.2A peak pulse current capability in a DO-204AL (DO-41) through-hole package. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating.

Equivalent and substitute parts are identified based on matching or compatible electrical characteristics (reverse standoff voltage, clamping voltage, peak pulse current, and power dissipation) and mechanical compatibility (through-hole mounting, axial package styles). Substitutes may vary in peak pulse current ratings and power handling to accommodate different circuit protection requirements while maintaining the same voltage protection window.

Substiute Parts

P4KE36CA-B

Littelfuse Inc.In Stock: 889P4KE36CA-B Datasheet

Current PartRFQ

1.5KE36CA

Good-Ark SemiconductorIn Stock: 147641.5KE36CA Datasheet

MFR RecommendedRFQ

1.5KE39CA

Taiwan Semiconductor CorporationIn Stock: 201781.5KE39CA Datasheet

MFR RecommendedRFQ

1.5KE43CA

Taiwan Semiconductor CorporationIn Stock: 203111.5KE43CA Datasheet

MFR RecommendedRFQ

P4KE36CA

Taiwan Semiconductor CorporationIn Stock: 100216P4KE36CA Datasheet

MFR RecommendedRFQ

P6KE36CA

Taiwan Semiconductor CorporationIn Stock: 25322P6KE36CA Datasheet

MFR RecommendedRFQ

SA36CA

Taiwan Semiconductor CorporationIn Stock: 2223SA36CA Datasheet

MFR RecommendedRFQ

1.5KE39CA

Taiwan Semiconductor CorporationIn Stock: 201781.5KE39CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4KE36CA-B are grouped based on the following substitution criteria:

Primary Matching Parameters:

• Voltage - Reverse Standoff (Typ): 30.8V ± tolerance
• Voltage - Clamping (Max) @ Ipp: 49.9V (target window)
• Bidirectional operation (1 channel)
• Through-hole axial mounting
• Zener type TVS diode
• General-purpose applications
• RoHS3 compliance

Secondary Compatibility Parameters:

• Current - Peak Pulse (10/1000µs): 8.2A minimum (higher ratings acceptable for increased protection margin)
• Power - Peak Pulse: 400W minimum (higher ratings acceptable)
• Operating Temperature: -55°C to 175°C preferred
• Package options: DO-204AL (DO-41), DO-204AC (DO-15), DO-201AA (DO-27)

Substitutes are classified into two categories:

Category A - Direct Voltage Match (30.8V Standoff): Parts maintaining identical reverse standoff voltage (30.8V) and clamping voltage (49.9V) with same or higher current/power ratings. These provide direct functional replacement with enhanced or equivalent protection capability.

Category B - Voltage Window Variants (33.3V to 36V Standoff): Parts with slightly elevated reverse standoff voltages (33.3V to 36V) and correspondingly higher clamping voltages (53.9V to 58.1V). These operate within an acceptable protection window for general-purpose applications but provide marginally higher voltage thresholds.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (Identical Voltage Characteristics):

The P4KE36CA (Taiwan Semiconductor Corporation) is the closest equivalent, maintaining identical reverse standoff voltage (30.8V), clamping voltage (49.9V), and package format (DO-204AL). The marginal difference in peak pulse current (8.4A vs. 8.2A) is within normal manufacturing tolerance and does not affect substitution suitability. Both parts are active products with full RoHS3 compliance and identical operating temperature ranges.

The 1.5KE36CA (Good-Ark Semiconductor) provides identical voltage characteristics with significantly enhanced current handling (30.1A) and power dissipation (1500W). This part is suitable for applications requiring higher transient energy absorption while maintaining the same voltage protection window. Package format differs (DO-201AE vs. DO-204AL), requiring PCB layout modification.

Higher Current Capacity Alternatives:

The P6KE36CA maintains identical voltage specifications with increased peak pulse current (12A) and power rating (600W) in a DO-204AC (DO-15) package. This option provides enhanced protection margin for circuits with higher transient energy exposure.

Elevated Voltage Window Options:

The SA36CA, 1.5KE39CA, and 1.5KE43CA operate at higher reverse standoff voltages (36V, 33.3V, and 36.8V respectively) with correspondingly elevated clamping voltages. These parts are suitable for applications where slightly higher voltage thresholds are acceptable or required. All three maintain RoHS3 compliance and active product status.

All substitute parts listed are active products with RoHS3 compliance, REACH unaffected status, and EAR99 export classification, matching the regulatory profile of the original P4KE36CA-B.

Frequently Asked Questions (FAQ)

Q: Can I substitute P4KE36CA-B with P4KE36CA from Taiwan Semiconductor Corporation?

A: Yes. Both parts maintain identical reverse standoff voltage (30.8V), clamping voltage (49.9V), and DO-204AL package format. The peak pulse current difference (8.4A vs. 8.2A) is negligible. Both are active products with full RoHS3 compliance and -55°C to 175°C operating temperature ranges.

Q: What is the difference between DO-204AL and DO-201AE packages?

A: DO-204AL (DO-41) is a smaller axial package with lower current and power ratings, typically used in low-energy transient protection circuits. DO-201AE (DO-27) is a larger axial package designed for higher current and power dissipation applications. PCB footprint and lead spacing differ between these packages, requiring layout modification for substitution.

Q: Can I use 1.5KE36CA instead of P4KE36CA-B?

A: Yes, for voltage protection characteristics. The 1.5KE36CA maintains identical reverse standoff (30.8V) and clamping voltage (49.9V). However, it features significantly higher peak pulse current (30.1A) and power rating (1500W), and uses a different package (DO-201AE). This substitution is suitable only if the PCB layout can accommodate the larger package and if the enhanced protection capability is acceptable for the application.

Q: What does "Reverse Standoff Voltage" mean in TVS diode selection?

A: Reverse standoff voltage is the maximum voltage the TVS diode can withstand in normal operation without conducting. For the P4KE36CA-B, this is 30.8V. When transient voltage exceeds the breakdown voltage (34.2V minimum), the diode conducts rapidly to clamp the voltage to the maximum clamping level (49.9V), protecting downstream components.

Q: Are SA36CA and 1.5KE39CA suitable replacements for P4KE36CA-B?

A: These parts operate at higher voltage thresholds (36V and 33.3V reverse standoff respectively) with elevated clamping voltages (58.1V and 53.9V). They are suitable only if the protected circuit can tolerate these higher voltage levels. Use these substitutes only when the application specifically requires elevated voltage protection windows.

Q: What is the significance of the "Bidirectional Channels: 1" specification?

A: This indicates the TVS diode provides bidirectional transient protection, suppressing overvoltage in both forward and reverse polarity directions. All listed substitute parts maintain this bidirectional characteristic, ensuring equivalent protection functionality regardless of voltage polarity.

Q: Do all substitute parts have the same moisture sensitivity rating?

A: Yes. All substitute parts listed maintain Moisture Sensitivity Level (MSL) 1 (Unlimited), matching the P4KE36CA-B specification. This indicates no moisture-related handling restrictions during storage, transport, or assembly.