P4SMA7.5C Equivalent & Substitute Parts

Part Overview

The P4SMA7.5C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 6.4V reverse standoff voltage, 11.87V maximum clamping voltage, and 36.3A peak pulse current capability in a DO-214AC (SMA) package. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and component procurement.

Key Parameters

Parameter	Value	Unit
Reverse Standoff Voltage (Typ)	6.4	V
Breakdown Voltage (Min)	6.77	V
Clamping Voltage (Max) @ Ipp	11.87	V
Peak Pulse Current (10/1000µs)	36.3	A
Peak Pulse Power	400	W
Package Type	DO-214AC (SMA)	—
Mounting Type	Surface Mount	—
Operating Temperature Range	-65 to 150	°C
Bidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the P4SMA7.5C is determined by the following critical parameters:

Reverse standoff voltage within the 6.0V to 7.0V range
Clamping voltage (Max) between 10.3V and 12.0V
Peak pulse current capability of 33.3A or greater
Peak pulse power rating of 400W
DO-214AC (SMA) surface-mount package
Bidirectional single-channel configuration
ROHS3 compliance

The substitute parts listed below meet these electrical and mechanical criteria and are suitable for direct replacement in applications requiring transient voltage suppression at the specified voltage levels.

Parameter Comparison

Part Number	Manufacturer	Reverse Standoff (V)	Breakdown Min (V)	Clamping Max @ Ipp (V)	Peak Pulse Current (A)	Peak Pulse Power (W)	Operating Temp (°C)	Product Status
P4SMA7.5C	Littelfuse	6.4	6.77	11.87	36.3	400	-65 to 150	Obsolete
P4SMA7.5CA	Taiwan Semiconductor Corporation	6.4	7.13	11.3	37	400	-55 to 150	Active
SMAJ6.0CA	Good-Ark Semiconductor	6.0	6.67	10.3	38.8	400	-55 to 150	Active
SMAJ6.5CA	MDD	6.5	7.22	11.2	35.7	400	-50 to 150	Active
SMAJ7.0CA	MDD	7.0	7.78	12.0	33.3	400	-50 to 150	Active
SMAJ7.0CA-M3/5A	Vishay General Semiconductor - Diodes Division	7.0	7.78	12.0	33.3	400	-55 to 150	Active
SMAJP4KE7.5CA-TP	Micro Commercial Co	6.4	7.13	11.3	36.3	400	-55 to 175	Active

Engineering Selection Recommendations

All substitute parts listed are active products with ROHS3 compliance and REACH unaffected status, ensuring regulatory compliance for new designs and ongoing production.

P4SMA7.5CA (Taiwan Semiconductor Corporation) provides the closest electrical match to the original P4SMA7.5C, with identical reverse standoff voltage (6.4V) and comparable clamping characteristics. This part is recommended as the primary substitute.

SMAJ6.5CA (MDD) offers a balanced alternative with 6.5V standoff voltage and 11.2V clamping voltage, suitable for applications tolerating minor voltage variations within the specified range.

SMAJ6.0CA (Good-Ark Semiconductor) and SMAJ7.0CA variants provide options for designs requiring lower or higher voltage thresholds respectively, with peak pulse current capabilities meeting or exceeding the original specification.

SMAJP4KE7.5CA-TP (Micro Commercial Co) extends the operating temperature range to 175°C, providing an option for high-temperature applications while maintaining electrical equivalence to the original part.

Frequently Asked Questions (FAQ)

Q: Can I use SMAJ6.0CA as a direct replacement for P4SMA7.5C?

A: SMAJ6.0CA is electrically compatible within the substitution criteria. It features a 6.0V reverse standoff voltage compared to the original 6.4V, resulting in earlier voltage suppression. This part is suitable for applications where the lower threshold voltage is acceptable.

Q: What is the difference between P4SMA7.5CA and SMAJP4KE7.5CA-TP?

A: Both parts share identical electrical specifications (6.4V standoff, 11.3V clamping, 36.3A peak current). SMAJP4KE7.5CA-TP extends the maximum operating temperature to 175°C versus 150°C for P4SMA7.5CA, making it suitable for high-temperature environments.

Q: Are all substitute parts available in the same DO-214AC package?

A: Yes. All substitute parts listed are surface-mount devices in the DO-214AC (SMA) package, ensuring mechanical and footprint compatibility with the original P4SMA7.5C design.

Q: Which substitute part has the highest peak pulse current rating?

A: SMAJ6.0CA (Good-Ark Semiconductor) provides the highest peak pulse current at 38.8A, exceeding the original specification of 36.3A.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and use.

Q: What is the temperature range difference between substitute options?

A: Most substitute parts operate from -55°C to 150°C. SMAJ6.5CA and SMAJ7.0CA (MDD) have a minimum operating temperature of -50°C. SMAJP4KE7.5CA-TP extends the maximum to 175°C. The original P4SMA7.5C operated from -65°C to 150°C.

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