SS16LHMQG Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS16LHMQG is a 60V, 1A Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation in a Sub SMA (DO-219AB) surface mount package. This component is classified as Active product status with AEC-Q101 automotive qualification. The SS16LHMQG serves as a fast recovery rectifier suitable for power conversion and protection applications requiring low forward voltage drop and rapid switching characteristics.

Substitute parts become necessary when the primary part reaches end-of-life status, inventory constraints occur, or design flexibility is required across manufacturing sources. The parts listed below maintain electrical and mechanical compatibility within the specified parameter ranges.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	60	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) Maximum @ If	700 mV @ 1 A	mV
Speed - Fast Recovery	≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	400	µA @ 60 V
Technology	Schottky	—
Package / Case	DO-219AB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the SS16LHMQG is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) Maximum: 60 V
Current - Average Rectified (Io): 1 A
Technology: Schottky
Package / Case: DO-219AB
Mounting Type: Surface Mount
Voltage - Forward (Vf) Maximum @ If: 700 mV @ 1 A (or lower)
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Allowable Variation Parameters:

Current - Reverse Leakage @ Vr: May vary (provided specification is met)
Operating Temperature - Junction: May extend beyond -55°C to 150°C range
Capacitance @ Vr, F: Not specified for main part; not a limiting factor
Manufacturer: Different manufacturers permitted if electrical parameters align

Substitute parts are grouped into two categories:

Parametric Equivalent: SS16L R3G maintains identical electrical specifications and automotive qualification status.

Similar Manufacturer Parts: SS1FH6-M3/H, SS1FH6HM3/H, and SS2FH6HM3/H are Vishay General Semiconductor alternatives. SS1FH6-M3/H and SS1FH6HM3/H match the 1A current rating. SS2FH6HM3/H provides 2A current rating and is suitable only for applications where higher current capacity is acceptable.

Parameter Comparison

Parameter	SS16LHMQG (Main)	SS16L R3G	SS1FH6-M3/H	SS1FH6HM3/H	SS2FH6HM3/H
Manufacturer	Taiwan Semiconductor	Taiwan Semiconductor	Vishay	Vishay	Vishay
Voltage - DC Reverse (Vr) Max	60 V	60 V	60 V	60 V	60 V
Current - Average Rectified (Io)	1 A	1 A	1 A	1 A	2 A
Voltage - Forward (Vf) Max @ If	700 mV @ 1 A	700 mV @ 1 A	700 mV @ 1 A	700 mV @ 1 A	780 mV @ 2 A
Speed - Fast Recovery	≤ 500ns, > 200mA	≤ 500ns, > 200mA	≤ 500ns, > 200mA	≤ 500ns, > 200mA	≤ 500ns, > 200mA
Current - Reverse Leakage @ Vr	400 µA @ 60 V	400 µA @ 60 V	3 µA @ 60 V	3 µA @ 60 V	3 µA @ 60 V
Package / Case	DO-219AB	DO-219AB	DO-219AB	DO-219AB	DO-219AB
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55 to 150°C	-55 to 150°C	-55 to 175°C	-55 to 175°C	-55 to 175°C
Grade	Automotive	Not specified	Not specified	Automotive	Automotive
Qualification	AEC-Q101	Not specified	Not specified	AEC-Q101	AEC-Q101
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Discontinued at DiGi Electronics	Active	Active	Active

Engineering Selection Recommendations

SS16L R3G: This part is a parametric equivalent to the SS16LHMQG with identical electrical specifications. However, product status is listed as Discontinued at DiGi Electronics, which may limit long-term availability. Selection of this substitute is appropriate only when inventory is confirmed available and future procurement is not a concern.

SS1FH6-M3/H: This Vishay part matches all critical electrical parameters for 1A operation at 60V reverse voltage. It is Active product status with extended operating temperature range (-55 to 175°C). This part lacks automotive grade designation and AEC-Q101 qualification. Selection is appropriate for non-automotive applications or where automotive qualification is not required.

SS1FH6HM3/H: This Vishay part provides identical electrical performance to SS1FH6-M3/H with the addition of Automotive grade and AEC-Q101 qualification. Operating temperature range extends to 175°C. This part is the preferred substitute for automotive applications requiring AEC-Q101 compliance.

SS2FH6HM3/H: This Vishay part is rated for 2A average rectified current, exceeding the 1A requirement of the SS16LHMQG. Forward voltage is specified at 780 mV @ 2A. This part includes Automotive grade and AEC-Q101 qualification. Selection is appropriate only when higher current capacity is required or acceptable for the application. Direct substitution in 1A-limited circuits is not recommended due to current rating mismatch.

Frequently Asked Questions (FAQ)

Q: Can SS16L R3G be used as a direct replacement for SS16LHMQG?

A: SS16L R3G matches all electrical parameters and package specifications. However, this part is listed as Discontinued at DiGi Electronics. Substitution is technically valid only if current inventory is available and future procurement is not required.

Q: What is the difference between SS1FH6-M3/H and SS1FH6HM3/H?

A: Both parts are manufactured by Vishay and share identical electrical specifications. SS1FH6HM3/H includes Automotive grade designation and AEC-Q101 qualification, while SS1FH6-M3/H does not. For automotive applications, SS1FH6HM3/H is the appropriate selection.

Q: Can SS2FH6HM3/H replace SS16LHMQG in all applications?

A: SS2FH6HM3/H is rated for 2A average rectified current, compared to 1A for the SS16LHMQG. While the higher current rating provides design margin, this part should be selected only when the application requires or can accommodate 2A capability. The forward voltage specification differs at the rated current (780 mV @ 2A versus 700 mV @ 1A).

Q: Are all substitute parts in the same package?

A: All substitute parts use the DO-219AB package (Sub SMA surface mount). Physical dimensions and PCB footprints are identical, enabling direct board-level substitution without layout modification.

Q: What is the significance of the reverse leakage current difference between Taiwan Semiconductor and Vishay parts?

A: The SS16LHMQG specifies 400 µA reverse leakage at 60V, while Vishay parts specify 3 µA at the same voltage. Lower reverse leakage in Vishay parts indicates superior leakage performance. This difference does not prevent substitution but represents a specification improvement in the Vishay alternatives.

Q: Which substitute part is recommended for new automotive designs?

A: SS1FH6HM3/H is the recommended substitute for new automotive designs. It provides AEC-Q101 qualification, Automotive grade designation, identical 1A current rating, and extended operating temperature range to 175°C.

Q: Are all parts RoHS3 compliant?

A: All parts listed, including the main part SS16LHMQG and all substitutes, are ROHS3 Compliant. All parts have MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions.

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