P4KE36A-E3/54 Equivalent & Substitute Parts

Part Overview

The P4KE36A-E3/54 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component operates in the TransZorb® series and is designed for general-purpose transient voltage suppression applications. The part features a 30.8V reverse standoff voltage with a 49.9V maximum clamping voltage and 8A peak pulse current capability in a DO-204AL (DO-41) through-hole axial package. The device is ROHS3 compliant and maintains active product status. Equivalent and substitute parts are identified based on matching or exceeding electrical performance parameters while maintaining compatible package form factors and thermal operating ranges.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	30.8	V
Voltage - Breakdown (Min)	34.2	V
Voltage - Clamping (Max) @ Ipp	49.9	V
Current - Peak Pulse (10/1000µs)	8	A
Power - Peak Pulse	400	W
Operating Temperature Range	-55 to 175	°C (TJ)
Package / Case	DO-204AL, DO-41, Axial	—
Mounting Type	Through Hole	—
Type	Zener	—
Unidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitute parts for the P4KE36A-E3/54 are classified into two functional categories based on electrical parameter compatibility:

Category 1: Direct Electrical Equivalents (Same Voltage Class, Same Power Rating) These parts maintain the 30.8V reverse standoff voltage and 49.9V clamping voltage specification with 400W peak pulse power rating. Substitutes in this category include P4KE36A (Taiwan Semiconductor Corporation) and P6KE36A (Fairchild Semiconductor). These parts are interchangeable for applications requiring identical voltage suppression characteristics and power dissipation limits. Package variations between DO-204AL (DO-41) and DO-204AC (DO-15) are both through-hole axial configurations suitable for direct board-level substitution.

Category 2: Higher Power Rating Alternatives (Same Voltage Class, Elevated Power Rating) These parts maintain the 30.8V reverse standoff voltage and 49.9V clamping voltage but provide increased peak pulse power ratings of 600W or 1500W. This category includes P6KE39A (Taiwan Semiconductor Corporation), BZW06-31RL (STMicroelectronics), and the 1.5KE series (1.5KE36A, 1.5KE39A, 1.5KE43A from Taiwan Semiconductor Corporation). These substitutes are suitable for applications requiring enhanced transient energy absorption capacity while maintaining the same voltage suppression threshold.

Category 3: Voltage-Shifted Alternatives (Elevated Voltage Class) Parts such as P4KE39A-TP (Micro Commercial Co) and P6KE39A (Taiwan Semiconductor Corporation) operate at 33.3V reverse standoff with 53.9V clamping voltage. These are applicable only when circuit design permits higher voltage suppression thresholds.

Substitution eligibility is determined by: (1) matching or exceeding reverse standoff voltage, (2) matching or lower clamping voltage, (3) matching or exceeding peak pulse current capability, (4) matching or exceeding power dissipation rating, and (5) compatible through-hole axial package configuration.

Parameter Comparison

Part Number	Manufacturer	Vwm (Typ) V	Vbr (Min) V	Vc (Max) V	Ipp (10/1000µs) A	Power W	Package	Status
P4KE36A-E3/54	Vishay	30.8	34.2	49.9	8	400	DO-204AL	Active
P4KE36A	Taiwan Semiconductor	30.8	34.2	49.9	8.4	400	DO-204AL	Active
P6KE36A	Fairchild Semiconductor	30.8	34.2	49.9	12.6	600	DO-204AC	Active
BZW06-31RL	STMicroelectronics	30.8	34.2	64.3	62	600	DO-204AC	Active
P4KE39A-TP	Micro Commercial Co	33.3	37.1	53.9	7.6	400	DO-204AL	Active
P6KE39A	Taiwan Semiconductor	33.3	37.1	53.9	11.2	600	DO-204AC	Active
1.5KE36A	Taiwan Semiconductor	30.8	34.2	49.9	31	1500	DO-201	Active
1.5KE39A	Taiwan Semiconductor	33.3	37.1	53.9	29	1500	DO-201	Active
1.5KE43A	Taiwan Semiconductor	36.8	40.9	59.3	26	1500	DO-201	Active

Engineering Selection Recommendations

Direct Substitution (Preferred for Pin-Compatible Replacement) P4KE36A from Taiwan Semiconductor Corporation is the primary direct substitute. This part maintains identical voltage specifications (30.8V Vwm, 49.9V Vc) and package configuration (DO-204AL) with marginally improved peak pulse current (8.4A vs 8A). Both parts are ROHS3 compliant with active product status and unlimited moisture sensitivity level (MSL 1). This substitution requires no circuit redesign.

Package-Compatible Substitution (DO-204AC Alternative) P6KE36A from Fairchild Semiconductor provides identical voltage performance (30.8V Vwm, 49.9V Vc) with enhanced current handling (12.6A) and power rating (600W). The DO-204AC (DO-15) package is mechanically compatible with through-hole axial mounting. This option is suitable when higher transient energy absorption is required within the same voltage suppression class.

Higher Power Density Applications The 1.5KE36A from Taiwan Semiconductor Corporation maintains the 30.8V/49.9V voltage specification while providing 1500W peak pulse power and 31A peak current capability. The DO-201 package is a larger through-hole axial form factor. This substitution is applicable for high-energy transient environments where the 400W rating of the original part is insufficient. Circuit board layout must accommodate the larger package footprint.

Voltage-Shifted Alternatives P4KE39A-TP and P6KE39A are suitable only when circuit design permits operation at elevated voltage thresholds (33.3V Vwm, 53.9V Vc). These parts are not interchangeable with the P4KE36A-E3/54 in applications requiring strict 30.8V standoff voltage compliance.

All recommended substitutes maintain active product status, ROHS3 compliance, and operating temperature range compatibility (-55°C to 175°C TJ).

Frequently Asked Questions (FAQ)

Q: Can P4KE36A from Taiwan Semiconductor replace P4KE36A-E3/54 from Vishay? A: Yes. Both parts share identical voltage specifications (30.8V Vwm, 49.9V Vc), current rating (8A nominal), power rating (400W), and DO-204AL package configuration. The Taiwan Semiconductor version offers marginally higher peak pulse current (8.4A). No circuit modifications are required.

Q: What is the difference between DO-204AL and DO-204AC packages? A: Both are through-hole axial packages for transient voltage suppressors. DO-204AL (DO-41) is the smaller diameter package used in the P4KE36A-E3/54. DO-204AC (DO-15) is a larger diameter package used in P6KE series devices. Both are mechanically compatible with standard through-hole PCB layouts, though DO-15 components occupy slightly more board space.

Q: Can I use P6KE36A as a direct replacement? A: P6KE36A is electrically compatible (30.8V Vwm, 49.9V Vc) with superior current and power ratings (12.6A, 600W). The primary difference is the package change from DO-204AL to DO-204AC. If the PCB layout accommodates the DO-15 package footprint, this substitution provides enhanced transient suppression capability without circuit redesign.

Q: When should I use 1.5KE36A instead of P4KE36A? A: The 1.5KE36A is selected for applications requiring significantly higher transient energy absorption (1500W vs 400W) while maintaining the same voltage suppression threshold (30.8V Vwm, 49.9V Vc). The larger DO-201 package accommodates the increased power dissipation. This substitution requires PCB layout modification to accommodate the larger component footprint.

Q: Are P4KE39A-TP and P6KE39A interchangeable with P4KE36A-E3/54? A: No. These parts operate at elevated voltage thresholds (33.3V Vwm, 53.9V Vc) compared to the original specification (30.8V Vwm, 49.9V Vc). They are suitable only for applications where circuit design permits higher voltage suppression levels. Using these parts in a circuit designed for 30.8V standoff voltage will result in inadequate transient protection.

Q: What compliance certifications apply to all substitute parts? A: All recommended substitutes maintain ROHS3 compliance, EAR99 export classification, and REACH unaffected status. Moisture sensitivity level is MSL 1 (unlimited) for all parts, indicating no special storage or handling requirements.

Q: Can I mix different substitute parts in the same circuit? A: Yes, provided all selected parts meet the circuit's voltage suppression requirements. For applications requiring 30.8V standoff voltage, any part from the direct equivalents category (P4KE36A, P6KE36A, 1.5KE36A) can be used interchangeably. Mixing voltage-shifted alternatives (P4KE39A-TP, P6KE39A) with 30.8V-class parts in the same circuit is not recommended unless the circuit topology permits independent voltage thresholds.

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