HT15G Equivalent & Substitute Parts

Part Overview

The HT15G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 400 V DC reverse voltage and 1 A average rectified current in a through-hole TS-1 axial package. This component is classified as Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and packaging specifications align with the original component, enabling direct replacement in circuit applications without design modification.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	400 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	50 ns
Current - Reverse Leakage @ Vr	5 µA @ 400 V
Capacitance @ Vr, F	15pF @ 4V, 1MHz
Package / Case	T-18, Axial
Mounting Type	Through Hole
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the HT15G are qualified based on the following criteria:

Electrical Parameters (Critical for Substitution):

Voltage - DC Reverse (Vr) (Max): 400 V
Current - Average Rectified (Io): 1 A
Voltage - Forward (Vf) (Max) @ If: 1.3 V @ 1 A
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr: 5 µA @ 400 V
Operating Temperature - Junction: -55°C ~ 150°C

Mechanical Parameters (Critical for Substitution):

Package / Case: T-18, Axial
Mounting Type: Through Hole
Supplier Device Package: TS-1

Compliance Parameters:

RoHS Status: ROHS3 Compliant
Product Status: Active

All substitute parts listed maintain identical or superior electrical performance within the specified operating range and are mechanically compatible with the original HT15G footprint and mounting configuration.

Parameter Comparison

Parameter	HT15G	F1T4GH	SFT16G	SFT16GH
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V	400 V
Current - Average Rectified (Io)	1 A	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1 A	1.3 V @ 1 A	1.3 V @ 1 A	1.3 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)	50 ns	150 ns	35 ns	35 ns
Current - Reverse Leakage @ Vr	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V
Capacitance @ Vr, F	15pF @ 4V, 1MHz	15pF @ 4V, 1MHz	10pF @ 4V, 1MHz	10pF @ 4V, 1MHz
Package / Case	T-18, Axial	T-18, Axial	T-18, Axial	T-18, Axial
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
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
Grade	Standard	Automotive	Standard	Automotive
Qualification	None Listed	AEC-Q101	None Listed	AEC-Q101

Engineering Selection Recommendations

HT15G (Original Component) The HT15G is suitable for standard general-purpose rectification applications requiring 400 V, 1 A performance. Product status is Active with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1).

F1T4GH (Automotive-Grade Substitute) The F1T4GH provides equivalent electrical specifications with automotive-grade qualification (AEC-Q101). This part is suitable for applications requiring automotive-level reliability and traceability. Reverse recovery time is 150 ns, which is within the fast recovery classification but slower than the original HT15G at 50 ns.

SFT16G (Standard-Grade Substitute) The SFT16G maintains standard-grade classification with improved reverse recovery time of 35 ns and reduced capacitance of 10pF compared to the HT15G. This part is suitable for applications where faster switching performance is beneficial.

SFT16GH (Automotive-Grade Substitute) The SFT16GH combines automotive-grade qualification (AEC-Q101) with improved reverse recovery time of 35 ns and reduced capacitance of 10pF. This part is suitable for automotive applications requiring enhanced switching performance.

All substitute parts are Active product status, ROHS3 compliant, and mechanically compatible with the original HT15G through-hole TS-1 axial package configuration.

Frequently Asked Questions (FAQ)

Q: Can the F1T4GH replace the HT15G in a standard application? A: Yes. The F1T4GH maintains identical voltage, current, and forward voltage specifications. The automotive-grade qualification does not prevent use in standard applications. The 150 ns reverse recovery time remains within the fast recovery classification.

Q: What is the difference between SFT16G and SFT16GH? A: Both parts have identical electrical specifications. The SFT16GH includes automotive-grade qualification (AEC-Q101), while the SFT16G is standard-grade. Both feature 35 ns reverse recovery time and 10pF capacitance.

Q: Are all substitute parts mechanically compatible with the HT15G? A: Yes. All substitute parts use the T-18 axial package with through-hole mounting and TS-1 supplier device package, ensuring direct mechanical compatibility.

Q: Does the reverse recovery time difference affect circuit performance? A: Reverse recovery time variations (35 ns to 150 ns) remain within the fast recovery classification (≤ 500ns, > 200mA). Circuit performance impact depends on specific application switching frequency and design margins.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the original HT15G compliance status.

Q: Can I use SFT16G or SFT16GH in automotive applications? A: SFT16GH is qualified for automotive applications with AEC-Q101 certification. SFT16G is standard-grade and should be evaluated against specific automotive application requirements.

Q: What is the inventory status of substitute parts? A: F1T4GH: 5720 Pcs, SFT16G: 5699 Pcs, SFT16GH: 5742 Pcs. All substitute parts are available as new original stock.

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