SMF48A-HM3-08 Equivalent & Substitute Parts

Part Overview

The SMF48A-HM3-08 is an active Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates as a unidirectional Zener diode in the eSMP® series, designed for transient voltage protection applications. The part is AEC-Q101 qualified for automotive-grade reliability and maintains ROHS3 compliance. Substitute parts are identified when electrical parameters and mechanical specifications align with the original component's functional requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	48	V
Voltage - Breakdown (Min)	53.3	V
Voltage - Clamping (Max) @ Ipp	77.4	V
Current - Peak Pulse (10/1000µs)	2.6	A
Power - Peak Pulse	200	W
Capacitance @ 1MHz	161	pF
Operating Temperature Range	-65 to 175	°C
Package / Case	DO-219AB (SMF)	-
Mounting Type	Surface Mount	-

Substitute Part Grouping Explanation

Substitution eligibility for the SMF48A-HM3-08 is determined by strict equivalence across the following electrical and mechanical parameters:

Voltage - Reverse Standoff: 48V (Typ)
Voltage - Breakdown: 53.3V (Min)
Voltage - Clamping: 77.4V (Max) @ Ipp
Current - Peak Pulse: 2.6A (10/1000µs)
Power - Peak Pulse: 200W
Unidirectional Channels: 1
Type: Zener
Operating Temperature: -65°C to 175°C
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts are grouped into two categories based on package compatibility:

Category 1: Direct Package Match (DO-219AB)

SMF48A-E3-08 (Vishay)
SMF48A-M3-08 (Vishay)

Category 2: Alternative Package (SOD-123F)

SMF48A-TP (Micro Commercial Co)

Parameter Comparison

Parameter	SMF48A-HM3-08	SMF48A-E3-08	SMF48A-M3-08	SMF48A-TP
Manufacturer	Vishay	Vishay	Vishay	Micro Commercial Co
Voltage - Reverse Standoff (Typ)	48V	48V	48V	48V
Voltage - Breakdown (Min)	53.3V	53.3V	53.3V	53.3V
Voltage - Clamping (Max) @ Ipp	77.4V	77.4V	77.4V	77.4V
Current - Peak Pulse (10/1000µs)	2.6A	2.6A	2.6A	2.6A
Power - Peak Pulse	200W	200W	200W	200W
Operating Temperature	-65 to 175°C (TJ)	-65 to 175°C (TJ)	-65 to 175°C (TJ)	-65 to 175°C (TA)
Package / Case	DO-219AB (SMF)	DO-219AB (SMF)	DO-219AB (SMF)	SOD-123F
Product Status	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All substitute parts maintain active product status and ROHS3 compliance, ensuring continued availability and regulatory conformance.

For DO-219AB Package Retention: SMF48A-E3-08 and SMF48A-M3-08 are direct substitutes with identical electrical specifications and package geometry. Both are manufactured by Vishay and maintain the same eSMP® series designation. Selection between these two depends on inventory availability and supply chain requirements.

For Alternative Package Application: SMF48A-TP (Micro Commercial Co) provides electrical equivalence but uses SOD-123F packaging instead of DO-219AB. This substitute is applicable only when PCB layout and assembly processes accommodate the alternative package footprint. The SOD-123F package is smaller than DO-219AB, which may require design verification for thermal and mechanical compatibility in the target application.

Frequently Asked Questions (FAQ)

Q: Can SMF48A-E3-08 or SMF48A-M3-08 be used as direct replacements for SMF48A-HM3-08?

A: Yes. Both parts are manufactured by Vishay with identical electrical parameters (48V standoff, 77.4V clamping, 2.6A peak pulse, 200W peak power) and the same DO-219AB package. They are functionally equivalent for circuit protection applications.

Q: What is the key difference between SMF48A-TP and the other substitutes?

A: SMF48A-TP is manufactured by Micro Commercial Co and uses SOD-123F packaging instead of DO-219AB. While electrical specifications are identical, the package footprint is different. PCB layout and assembly compatibility must be verified before substitution.

Q: Are all substitute parts automotive-grade qualified?

A: SMF48A-HM3-08 carries AEC-Q101 automotive qualification. SMF48A-E3-08 and SMF48A-M3-08 do not list AEC-Q101 qualification in the provided specifications. SMF48A-TP does not list automotive qualification. For automotive applications requiring AEC-Q101 compliance, only SMF48A-HM3-08 meets this requirement.

Q: What is the difference between TJ and TA temperature specifications?

A: TJ (Junction Temperature) refers to the maximum temperature at the semiconductor junction. TA (Ambient Temperature) refers to the surrounding air temperature. Both SMF48A-HM3-08 and its substitutes operate across -65°C to 175°C, with the specification type differing by manufacturer convention.

Q: Can I substitute based on the base product number SMF48?

A: The base product number SMF48 indicates the same voltage and current rating family. However, substitution must be verified against the complete part number suffix (HM3, E3, M3, TP), as these designate specific packaging, qualification, and manufacturing variations. All electrical parameters must match exactly.

Q: What inventory levels are available for each part?

A: SMF48A-HM3-08: 952 pcs; SMF48A-E3-08: 16,451 pcs; SMF48A-M3-08: 17,250 pcs; SMF48A-TP: 4,742 pcs. Inventory levels are subject to change and should be verified at time of procurement.

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