P6SMB220C Equivalent & Substitute Parts

Part Overview

The P6SMB220C is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component operates with a reverse standoff voltage of 185V and provides 600W peak pulse power dissipation in a DO-214AA (SMB) package. The part is currently obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Reverse Standoff Voltage (Typ)	185V
Voltage - Breakdown (Min)	198V
Voltage - Clamping (Max) @ Ipp	344.4V
Current - Peak Pulse (10/1000µs)	1.9A
Power - Peak Pulse	600W
Package / Case	DO-214AA, SMB
Operating Temperature Range	-55°C ~ 150°C (TJ)
Bidirectional Channels	1
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution of the P6SMB220C is determined by the following critical parameters:

Reverse Standoff Voltage: Must be 185V (±tolerance acceptable per manufacturer specifications)
Package / Case: Must be DO-214AA or SMB equivalent for PCB compatibility
Bidirectional Channels: Must be 1 (single channel)
Mounting Type: Must be Surface Mount
Power - Peak Pulse: Must be 600W minimum
Operating Temperature Range: Must support -55°C to 150°C minimum

All substitute parts listed maintain these core electrical and mechanical parameters, ensuring direct functional equivalence in circuit applications.

Parameter Comparison

Parameter	P6SMB220C (Littelfuse)	P6SMB220CA (Eaton)	P6SMB220CA-E3/5B (Vishay)	SM6T220CA (STMicroelectronics)	TVP06B221CA-G (Comchip)
Reverse Standoff Voltage (Typ)	185V	185V	185V	188V	185V
Voltage - Breakdown (Min)	198V	209V	209V	209V	209V
Voltage - Clamping (Max) @ Ipp	344.4V	328V	328V	388V	328V
Current - Peak Pulse (10/1000µs)	1.9A	1.9A	1.8A	10.3A (8/20µs)	1.83A
Power - Peak Pulse	600W	600W	600W	600W	600W
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Operating Temperature Range	-55°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

P6SMB220CA (Eaton - Electronics Division): This part is the manufacturer-recommended substitute with identical electrical specifications to the original P6SMB220C. Active product status ensures long-term availability. RoHS compliance and high inventory levels (18,690 pcs) support production continuity. Suitable for telecom and general-purpose applications.

P6SMB220CA-E3/5B (Vishay General Semiconductor): Active product with extended operating temperature range (-65°C to 150°C) compared to the original specification. Slightly lower peak pulse current (1.8A vs. 1.9A) remains within functional tolerance. ROHS3 and REACH compliance confirmed. Recommended for applications requiring enhanced low-temperature performance.

SM6T220CA (STMicroelectronics): Active product with higher peak pulse current capability (10.3A at 8/20µs pulse) and elevated clamping voltage (388V). This part provides enhanced transient suppression performance. ROHS3 and REACH compliant. Select this substitute when circuit design permits higher clamping voltage and requires superior current handling.

TVP06B221CA-G (Comchip Technology): Active product with specifications closely aligned to the original P6SMB220C. Peak pulse current of 1.83A and clamping voltage of 328V provide functional equivalence. ROHS3 and REACH compliant. Suitable for cost-optimized designs with equivalent performance requirements.

Frequently Asked Questions (FAQ)

Q: Can I use SM6T220CA as a direct replacement for P6SMB220C?

A: SM6T220CA maintains the same reverse standoff voltage (188V nominal, within tolerance of 185V), package type (DO-214AA/SMB), and power rating (600W). However, the clamping voltage is higher (388V vs. 344.4V) and peak pulse current is significantly higher (10.3A vs. 1.9A). This part is suitable only if your circuit design accommodates the higher clamping voltage specification.

Q: What is the difference between the Eaton and Vishay versions?

A: Both P6SMB220CA (Eaton) and P6SMB220CA-E3/5B (Vishay) share identical reverse standoff voltage (185V) and clamping voltage (328V). The Vishay variant offers extended low-temperature operation (-65°C vs. -55°C minimum) and slightly lower peak pulse current (1.8A vs. 1.9A). Select Vishay for temperature-critical applications; select Eaton for standard requirements with higher current capacity.

Q: Are all substitute parts in the same package?

A: Yes. All substitute parts use DO-214AA (SMB) surface-mount package, ensuring identical PCB footprint and reflow soldering compatibility with the original P6SMB220C design.

Q: Which substitute has the best availability?

A: SM6T220CA (STMicroelectronics) has the highest inventory level at 35,100 pcs. P6SMB220CA (Eaton) follows with 18,690 pcs. Both ensure reliable supply for production requirements.

Q: Do all substitutes meet RoHS compliance?

A: Yes. All substitute parts listed are RoHS3 compliant or RoHS compliant, meeting environmental and regulatory requirements equivalent to or exceeding the original P6SMB220C specification.

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