HT16G A1G General Purpose Rectifier Diode Equivalent & Substitute Parts

Part Overview

The HT16G A1G is a general purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 600 V DC reverse voltage and 1 A average rectified current in a through-hole TS-1 axial package. This component is classified as discontinued at DiGi Electronics, necessitating identification of equivalent substitute parts for ongoing design support and procurement requirements. Equivalent and substitute parts maintain identical or superior electrical characteristics while offering active product status and continued availability.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	600 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.7 V @ 1 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	75 ns
Current - Reverse Leakage @ Vr	5 µA @ 600 V
Capacitance @ Vr, F	10 pF @ 4V, 1MHz
Mounting Type	Through Hole
Package / Case	T-18, Axial
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the HT16G A1G are classified based on electrical parameter equivalence and product availability status. Substitution is valid when the following criteria are met:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 600 V minimum
Current - Average Rectified (Io): 1 A minimum
Voltage - Forward (Vf) (Max) @ If: 1.7 V or lower @ 1 A
Reverse Recovery Time (trr): 75 ns or faster
Current - Reverse Leakage @ Vr: 5 µA or lower @ 600 V
Mounting Type: Through Hole
Package / Case: T-18, Axial
Operating Temperature - Junction: -55°C ~ 150°C minimum range

Direct Equivalent: HT16G A0G maintains identical electrical specifications with active product status.

Parametric Equivalents: SFT18G A0G and SFT18GHA0G offer improved reverse recovery time (35 ns versus 75 ns) while maintaining all other critical parameters. The SFT18GHA0G variant includes automotive-grade qualification (AEC-Q101).

Parameter Comparison

Parameter	HT16G A1G (Main)	HT16G A0G (Direct Equivalent)	SFT18G A0G (Parametric Equivalent)	SFT18GHA0G (Parametric Equivalent - Automotive)
Manufacturer	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation
Product Status	Discontinued at DiGi Electronics	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	600 V	600 V	600 V	600 V
Current - Average Rectified (Io)	1 A	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.7 V @ 1 A	1.7 V @ 1 A	1.7 V @ 1 A	1.7 V @ 1 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	75 ns	75 ns	35 ns	35 ns
Current - Reverse Leakage @ Vr	5 µA @ 600 V	5 µA @ 600 V	5 µA @ 600 V	5 µA @ 600 V
Capacitance @ Vr, F	10 pF @ 4V, 1MHz	10 pF @ 4V, 1MHz	10 pF @ 4V, 1MHz	10 pF @ 4V, 1MHz
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	T-18, Axial	T-18, Axial	T-18, Axial	T-18, Axial
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Automotive Grade / AEC-Q101	Not specified	Not specified	Not specified	AEC-Q101 Qualified

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): Select HT16G A0G when an exact electrical and mechanical equivalent is required. This part maintains all specifications of the discontinued HT16G A1G while offering active product status and current availability.

For Enhanced Performance (Improved Reverse Recovery Time): Select SFT18G A0G when faster switching characteristics are beneficial to circuit performance. The 35 ns reverse recovery time (compared to 75 ns) reduces switching losses and improves efficiency in rectification applications. All other electrical parameters remain equivalent to the main part.

For Automotive Applications: Select SFT18GHA0G when the application requires automotive-grade qualification. This part carries AEC-Q101 qualification in addition to the improved 35 ns reverse recovery time, making it suitable for automotive power supply and rectification circuits. ROHS3 compliance and MSL 1 rating are maintained.

All substitute parts are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements equivalent to the original part.

Frequently Asked Questions (FAQ)

Q: Can HT16G A0G be used as a direct replacement for HT16G A1G?

A: Yes. HT16G A0G is a direct equivalent with identical electrical specifications: 600 V reverse voltage, 1 A average rectified current, 1.7 V forward voltage drop at 1 A, 75 ns reverse recovery time, and 5 µA reverse leakage current at 600 V. Both parts use the same T-18 axial through-hole package. The primary difference is product status: HT16G A0G is active while HT16G A1G is discontinued.

Q: What is the difference between SFT18G A0G and SFT18GHA0G?

A: Both parts are parametric equivalents with identical electrical specifications and improved 35 ns reverse recovery time. The SFT18GHA0G variant includes automotive-grade qualification (AEC-Q101), making it suitable for automotive applications. For non-automotive applications, SFT18G A0G is functionally equivalent.

Q: Why would I choose a substitute with faster reverse recovery time?

A: Faster reverse recovery time (35 ns versus 75 ns) reduces switching losses during the diode's transition from forward to reverse bias. This improvement benefits high-frequency rectification circuits and power supply designs by decreasing heat generation and improving overall efficiency. The choice depends on circuit requirements and thermal considerations.

Q: Are all substitute parts compatible with the same PCB footprint?

A: Yes. All substitute parts use the T-18 axial through-hole package, maintaining identical mechanical dimensions and PCB mounting compatibility with the original HT16G A1G.

Q: Do the substitute parts meet the same environmental and compliance standards?

A: Yes. All substitute parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited moisture sensitivity level) rating, matching the compliance profile of the original part. The SFT18GHA0G additionally carries AEC-Q101 automotive qualification.

Q: What is the inventory status of substitute parts?

A: HT16G A0G has 880 pieces in stock, SFT18G A0G has 917 pieces in stock, and SFT18GHA0G has 908 pieces in stock. All substitute parts are listed as active products with current availability.

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