SMF11A-E3-08 Equivalent & Substitute Parts

Part Overview

The SMF11A-E3-08 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component operates with an 11V reverse standoff voltage and provides 18.2V maximum clamping voltage at peak pulse current of 11A. The device is housed in a DO-219AB (SMF) surface mount package and is classified as Active product status. Substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required for manufacturing compatibility, or when enhanced electrical performance characteristics are needed for specific circuit applications.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	11	V
Voltage - Breakdown (Min)	12.2	V
Voltage - Clamping (Max) @ Ipp	18.2	V
Current - Peak Pulse (10/1000µs)	11	A
Power - Peak Pulse	200	W
Operating Temperature Range	-65 to 175	°C
Package / Case	DO-219AB (SMF)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the SMF11A-E3-08 is determined by the following critical electrical parameters: reverse standoff voltage (11V nominal), breakdown voltage minimum (12.2V), maximum clamping voltage (18.2V), and peak pulse current rating (11A or higher). All substitute parts must maintain these core voltage specifications to ensure circuit protection performance. Peak pulse current may exceed the original specification without functional degradation. Package format variations (DO-219AB, SOD-123F, SOD-123FL, SOD-123W) are acceptable provided the component is surface mount and compatible with standard PCB assembly processes. Operating temperature range, RoHS compliance, and MSL rating are secondary considerations that do not restrict substitution eligibility when primary electrical parameters align.

Parameter Comparison

Part Number	Manufacturer	Reverse Standoff (V)	Breakdown Min (V)	Clamping Max (V)	Peak Pulse Current (A)	Power Peak Pulse (W)	Package	Temp Range (°C)
SMF11A-E3-08	Vishay	11	12.2	18.2	11	200	DO-219AB	-65 to 175
SMF11A	MDD	11	12.2	18.2	11	200	SOD-123F, SMF	-55 to 150
SMF11A-TP	Micro Commercial Co	11	12.2	18.2	11	200	SOD-123F	-65 to 175
PTVS11VS1UR,115	Nexperia USA Inc.	11	12.2	18.2	22	400	SOD-123W	-55 to 150
PTVS12VS1UTR,115	Nexperia USA Inc.	12	13.3	19.9	20.1	400	SOD-123W	-55 to 185
SMF12A	MDD	12	13.3	19.9	10.1	200	SOD-123F, SMF	-55 to 150
SMF13A	Diotec Semiconductor	13	14.4	21.5	9.3	200	SOD-123F	-50 to 150
SMF13A-TP	Micro Commercial Co	13	14.4	21.5	9.3	200	SOD-123F	-65 to 175
SMF15A	MDD	15	16.7	24.4	8.2	200	SOD-123F, SMF	-55 to 150
SMF15A-TP	Micro Commercial Co	15	16.7	24.4	8.2	200	SOD-123F	-65 to 175
SMF16A	MDD	16	17.8	26	7.7	200	SOD-123F, SMF	-55 to 150

Engineering Selection Recommendations

Direct electrical equivalents to SMF11A-E3-08 are SMF11A (MDD), SMF11A-TP (Micro Commercial Co), and PTVS11VS1UR,115 (Nexperia). These three parts maintain identical reverse standoff voltage (11V), breakdown voltage (12.2V minimum), and clamping voltage (18.2V maximum) specifications. SMF11A-TP and SMF11A-E3-08 share identical operating temperature range (-65°C to 175°C), providing thermal compatibility for applications requiring extended temperature performance. PTVS11VS1UR,115 offers enhanced peak pulse current (22A versus 11A) and power dissipation (400W versus 200W), suitable for circuits requiring higher transient energy absorption. All three direct equivalents carry ROHS3 compliance and Active product status.

Parts with elevated voltage ratings (SMF12A, SMF13A, SMF13A-TP, SMF15A, SMF15A-TP, SMF16A, and PTVS12VS1UTR,115) are not direct substitutes due to higher reverse standoff and clamping voltages. These components are applicable only in circuits where the protected circuit voltage is higher than 11V nominal. Selection among higher-voltage alternatives depends on the specific circuit protection requirement and should be based on the actual operating voltage of the protected circuit.

Frequently Asked Questions (FAQ)

Q: Can SMF11A-TP replace SMF11A-E3-08 directly? A: Yes. Both parts share identical electrical specifications: 11V reverse standoff, 12.2V breakdown minimum, 18.2V clamping maximum, and 11A peak pulse current. SMF11A-TP is packaged in SOD-123F format while SMF11A-E3-08 uses DO-219AB; both are surface mount packages compatible with standard PCB assembly equipment.

Q: What is the difference between SMF11A and SMF11A-TP? A: Both are manufactured by different suppliers (MDD versus Micro Commercial Co) with identical electrical ratings. The primary difference is operating temperature range: SMF11A operates -55°C to 150°C while SMF11A-TP operates -65°C to 175°C. For applications requiring extended low-temperature performance, SMF11A-TP is the appropriate selection.

Q: Why is PTVS11VS1UR,115 listed as a substitute if it has 22A peak pulse current? A: PTVS11VS1UR,115 maintains the critical voltage specifications (11V standoff, 12.2V breakdown, 18.2V clamping) that determine circuit protection performance. The higher peak pulse current (22A versus 11A) and power rating (400W versus 200W) represent enhanced capability and do not prevent substitution. This part is suitable when the circuit can tolerate higher transient energy absorption.

Q: Can SMF12A or SMF13A be used instead of SMF11A-E3-08? A: No. SMF12A and SMF13A have higher reverse standoff voltages (12V and 13V respectively) and higher clamping voltages (19.9V and 21.5V respectively). These parts are designed for circuits with higher operating voltages and will not provide equivalent protection for an 11V circuit.

Q: What package formats are available for 11V TVS diodes equivalent to SMF11A-E3-08? A: Direct electrical equivalents are available in DO-219AB (SMF11A-E3-08), SOD-123F/SMF (SMF11A), SOD-123FL (SMF11A-TP), and SOD-123W (PTVS11VS1UR,115). All formats are surface mount and compatible with automated PCB assembly processes.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 Compliant status and are suitable for applications requiring RoHS compliance.

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