P4SMA8.2C Equivalent & Substitute Parts

Part Overview

The P4SMA8.2C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface mount applications. This part operates with a 7.02V reverse standoff voltage and 12.71V maximum clamping voltage, delivering 33.9A peak pulse current in a DO-214AC (SMA) package. The P4SMA8.2C is currently obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	P4SMA8.2C
Manufacturer	Littelfuse Inc.
Product Status	Obsolete
Type	Zener TVS Diode
Package	DO-214AC (SMA)
Voltage - Reverse Standoff (Typ)	7.02V
Voltage - Breakdown (Min)	7.4V
Voltage - Clamping (Max) @ Ipp	12.71V
Current - Peak Pulse (10/1000µs)	33.9A
Power - Peak Pulse	400W
Operating Temperature	-65°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the P4SMA8.2C are selected based on the following critical parameters that determine functional equivalence:

Primary Selection Criteria:

Reverse standoff voltage within 7.0V to 7.02V range
Clamping voltage (Max) between 12.0V and 12.71V
Peak pulse current (10/1000µs) between 33.3A and 34A
Power dissipation of 400W
DO-214AC (SMA) surface mount package
Bidirectional, single-channel Zener TVS configuration
General-purpose application classification
ROHS3 compliance

Substitutes are grouped into two categories based on voltage matching precision:

Group 1: Exact Voltage Match (7.0V Standoff) Parts with 7.0V reverse standoff voltage and 12.0V clamping voltage provide the closest electrical equivalence to the original P4SMA8.2C specification.

Group 2: Near-Match Voltage (6.0V to 6.5V Standoff) Parts with lower standoff voltages (6.0V to 6.5V) operate at reduced voltage thresholds and are suitable only when circuit design permits lower protection thresholds.

Parameter Comparison

Part Number	Manufacturer	Status	Standoff (V)	Breakdown Min (V)	Clamp Max (V)	Peak Pulse (A)	Temp Range (°C)	Package
P4SMA8.2C	Littelfuse Inc.	Obsolete	7.02	7.4	12.71	33.9	-65 ~ 150	DO-214AC
P4SMA8.2CA	Taiwan Semiconductor	Active	7.02	7.79	12.1	34	-55 ~ 150	DO-214AC
SMAJ7.0CA	MDD	Active	7.0	7.78	12.0	33.3	-50 ~ 150	DO-214AC
SMAJ7.0CA-13-F	Diodes Incorporated	Active	7.0	7.78	12.0	33.3	-55 ~ 150	DO-214AC
SMAJ7.0CA-E3/5A	Vishay General Semiconductor	Active	7.0	7.78	12.0	33.3	-55 ~ 150	DO-214AC
SMAJ7.0CA-E3/61	Vishay General Semiconductor	Active	7.0	7.78	12.0	33.3	-55 ~ 150	DO-214AC
SMAJ7.0CA-M3/5A	Vishay General Semiconductor	Active	7.0	7.78	12.0	33.3	-55 ~ 150	DO-214AC
SMAJ7.0CA-TP	Micro Commercial Co	Active	7.0	7.78	12.0	33.3	-55 ~ 175	DO-214AC
SMAJ6.5CA	MDD	Active	6.5	7.22	11.2	35.7	-50 ~ 150	DO-214AC
SMAJ6.0CA	Good-Ark Semiconductor	Active	6.0	6.67	10.3	38.8	-55 ~ 150	DO-214AC

Engineering Selection Recommendations

Primary Recommendation: P4SMA8.2CA The P4SMA8.2CA from Taiwan Semiconductor Corporation is the direct functional equivalent. It maintains the same 7.02V reverse standoff voltage, operates at active product status with full ROHS3 compliance, and is available in high volume (23,950 pcs). The clamping voltage of 12.1V is within acceptable tolerance of the original 12.71V specification. Operating temperature range is -55°C to 150°C, which covers most industrial applications, though the original part extends to -65°C.

Secondary Recommendations: SMAJ7.0 Series The SMAJ7.0CA variants (MDD, Diodes Incorporated, Vishay, and Micro Commercial Co) provide active-status alternatives with 7.0V standoff voltage and 12.0V clamping voltage. These parts deliver equivalent electrical performance with high inventory availability. Vishay variants are available in multiple packaging codes (E3/5A, E3/61, M3/5A) for different supply chain requirements. The Micro Commercial Co variant (SMAJ7.0CA-TP) extends operating temperature to 175°C, providing enhanced thermal margin.

Lower-Voltage Alternatives: SMAJ6.5CA and SMAJ6.0CA These parts operate at reduced standoff voltages (6.5V and 6.0V respectively) and are suitable only when circuit design permits lower protection thresholds. SMAJ6.0CA delivers higher peak pulse current (38.8A) but with proportionally lower clamping voltage (10.3V).

All recommended substitutes maintain ROHS3 compliance, MSL Level 1 rating, and DO-214AC surface mount packaging.

Frequently Asked Questions (FAQ)

Q: Can P4SMA8.2CA directly replace P4SMA8.2C without circuit modification? A: Yes. The P4SMA8.2CA maintains identical reverse standoff voltage (7.02V) and equivalent clamping voltage (12.1V vs. 12.71V). Both are Zener TVS diodes in DO-214AC packages with 400W peak power rating. No circuit changes are required.

Q: What is the difference between SMAJ7.0CA variants from different manufacturers? A: All SMAJ7.0CA variants share identical electrical specifications: 7.0V standoff, 12.0V clamp, 33.3A peak pulse, and 400W power. Differences exist only in packaging codes (E3/5A, E3/61, M3/5A, TP) which reflect supply chain and tape/reel configurations. Selection depends on procurement and assembly equipment compatibility.

Q: Why does the original P4SMA8.2C specify -65°C minimum temperature while substitutes specify -55°C? A: The P4SMA8.2C was designed with extended low-temperature capability. Most active substitute parts operate to -55°C, which is sufficient for standard industrial applications (-40°C to 85°C ambient). If -65°C operation is required, verify circuit design permits the slightly higher clamping voltage of available substitutes or consult with manufacturers for custom specifications.

Q: Can SMAJ6.5CA or SMAJ6.0CA be used as substitutes? A: These parts operate at lower standoff voltages (6.5V and 6.0V respectively) and trigger protection at lower voltage thresholds than the original P4SMA8.2C (7.02V). They are suitable only if circuit design explicitly permits lower protection activation points. Verify circuit requirements before selection.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance certification and MSL Level 1 (unlimited moisture sensitivity) rating, matching the original P4SMA8.2C environmental specifications.

Q: What is the significance of the DO-214AC (SMA) package designation? A: DO-214AC and SMA are equivalent designations for the same surface mount package. All listed parts use this standardized package, ensuring mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message