Equivalent & Substitute Parts for 3KP58C-B TVS Diode

Part Overview

The 3KP58C-B is a through-hole transient voltage suppressor (TVS) diode manufactured by Littelfuse, classified as a Zener-type bidirectional device. This component is designated as obsolete, which necessitates identification of active substitute parts that maintain electrical and mechanical compatibility for new designs or ongoing production requirements. The 3KP58C-B operates across a junction temperature range of -55°C to 175°C and is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	58	V
Voltage - Breakdown (Min)	61.02	V
Voltage - Clamping (Max) @ Ipp	98.28	V
Current - Peak Pulse (10/1000µs)	32.1	A
Power - Peak Pulse	3000	W
Operating Temperature Range	-55 to 175	°C
Mounting Type	Through Hole	—
Package / Case	P600, Axial	—
Bidirectional Channels	1	—
Type	Zener	—

Substitute Part Grouping Explanation

Substitution of the 3KP58C-B is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 58V
Voltage - Breakdown (Min): within acceptable range (61.02V to 64.8V)
Bidirectional Channels: 1
Type: Zener
Mounting Type: Through Hole
Operating Temperature Range: minimum -55°C to 175°C
RoHS3 Compliance: required

Power and Current Considerations: Substitute parts are grouped by power dissipation capability (3kW, 5kW, 15kW, or 30kW) and peak pulse current rating. Higher power-rated devices provide enhanced transient protection margins but maintain the same voltage protection threshold.

Package Variations: Acceptable packages include P600 (Littelfuse standard) and R-6 (Micro Commercial Co equivalent), both axial through-hole configurations. The AK package represents a different mechanical form factor with right-angle bend geometry and is listed as an alternative for applications permitting package variation.

Parameter Comparison

Part Number	Manufacturer	VWM (V)	V(BR) Min (V)	V(CL) Max @ Ipp (V)	Ipp (A)	Power (W)	Package	Status
3KP58C-B	Littelfuse	58	61.02	98.28	32.1	3000	P600	Obsolete
5KP58CA-B	Littelfuse Inc.	58	64.4	93.6	54.5	5000	P600	Active
3KP58CA-TP	Micro Commercial Co	58	64.4	93.6	32.1	3000	R-6	Active
15KP58CA-TP	Micro Commercial Co	58	64.4	94	—	15000	R-6	Active
15KPA58CAE3/TR13	Microchip Technology	58	64.8	93.8	161	15000	P600	Active
30KP58CA-TP	Micro Commercial Co	58	64.8	92.4	—	30000	R-6	Active
AK6-058C-BP	Micro Commercial Co	58	64	110	6000 (8/20µs)	—	AK	Active
AK15-058C-BP	Micro Commercial Co	58	64	110	15000 (8/20µs)	—	AK	Active

Engineering Selection Recommendations

Direct Replacement (Same Power Rating, Active Status): The 3KP58CA-TP from Micro Commercial Co provides the closest functional equivalent with identical 3kW power rating and 32.1A peak pulse current. This part maintains the same electrical protection characteristics while offering active product status and REACH compliance. Package change from P600 to R-6 requires mechanical verification in the application circuit board layout.

Upgraded Protection (Higher Power Rating, Active Status): The 5KP58CA-B (Littelfuse) offers 5kW capability with the same P600 package, enabling direct mechanical substitution. The 15KPA58CAE3/TR13 (Microchip Technology) and 15KP58CA-TP (Micro Commercial Co) provide 15kW protection with active status and full compliance certifications. The 30KP58CA-TP extends protection to 30kW for applications requiring enhanced transient suppression margins.

Alternative Package Consideration: The AK6-058C-BP and AK15-058C-BP employ different mechanical geometry (right-angle bend, 24.15mm center) and measure peak pulse current using 8/20µs waveform rather than 10/1000µs. These are suitable only where circuit board layout accommodates the AK package form factor and application transient profiles align with 8/20µs pulse specifications.

Compliance and Inventory: All recommended active substitutes maintain ROHS3 compliance and MSL 1 rating. Littelfuse parts (5KP58CA-B) preserve original manufacturer continuity. Micro Commercial Co and Microchip Technology alternatives provide equivalent electrical performance with established supply availability.

Frequently Asked Questions (FAQ)

Q: Can the 3KP58CA-TP replace the 3KP58C-B in existing designs? A: Yes, provided the circuit board layout accommodates the R-6 package. Electrical parameters are equivalent: 58V standoff voltage, 32.1A peak pulse current, and 3kW power dissipation. Mechanical verification of lead spacing and component orientation is required.

Q: What is the difference between the 3KP58CA-TP and 5KP58CA-B? A: Both maintain 58V standoff voltage and P600/R-6 package compatibility. The 5KP58CA-B increases peak pulse current from 32.1A to 54.5A and power rating from 3kW to 5kW, providing enhanced transient protection. The 5KP58CA-B uses the original P600 package.

Q: Are the AK-series parts (AK6-058C-BP, AK15-058C-BP) direct substitutes? A: No. While maintaining 58V standoff voltage, the AK-series employs different mechanical packaging (right-angle bend geometry) and measures peak pulse current using 8/20µs waveform instead of 10/1000µs. These are alternatives only where application circuit board design and transient pulse characteristics permit package variation.

Q: Why do some substitute parts show higher clamping voltage (110V for AK-series)? A: The AK-series devices are specified for different pulse waveforms (8/20µs versus 10/1000µs). Clamping voltage varies with pulse duration and current profile. Selection depends on actual application transient characteristics, not nominal voltage rating alone.

Q: Which substitute offers the best inventory availability? A: The 15KPA58CAE3/TR13 (Microchip Technology) shows 997 units in stock. The 3KP58CA-TP (Micro Commercial Co) provides 864 units with identical electrical performance to the original 3KP58C-B at 3kW power rating.

Q: Is temperature range a limiting factor in substitution? A: The original 3KP58C-B operates -55°C to 175°C. All recommended substitutes maintain this range except AK6-058C-BP and AK15-058C-BP, which are rated -55°C to 150°C. For applications requiring 175°C operation, use P600 or R-6 package alternatives only.

Q: Can I use a 15kW or 30kW rated part in place of the 3kW original? A: Yes. Higher power-rated devices provide additional transient suppression margin and are electrically compatible at the 58V protection threshold. No circuit modification is required. This approach is suitable for applications where enhanced reliability is prioritized.

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