S1GALH General Purpose Rectifier Diode Equivalent & Substitute Parts

Part Overview

The S1GALH is a general purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 400V DC reverse voltage and 1A average rectified current in a thin SMA surface mount package. This component is classified as Active product status and is qualified to AEC-Q101 automotive standards. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required for procurement, inventory management, or supply chain continuity purposes.

Substiute Parts

S1GALH

Taiwan Semiconductor CorporationIn Stock: 7932S1GALH Datasheet

Current PartRFQ

S1GAL

Taiwan Semiconductor CorporationIn Stock: 15000S1GAL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the S1GALH are identified based on electrical parameter equivalence and mechanical compatibility. The substitution criteria are:

• Voltage - DC Reverse (Vr) (Max): 400 V
• Current - Average Rectified (Io): 1 A
• Voltage - Forward (Vf) (Max) @ If: 1.1 V @ 1 A
• Speed: Standard Recovery >500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 1 µA @ 400 V
• Capacitance @ Vr, F: 8 pF @ 4V, 1MHz
• Package / Case: DO-221AC, SMA Flat Leads
• Operating Temperature - Junction: -55°C ~ 150°C
• Mounting Type: Surface Mount

Parts meeting all these parameters are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

The S1GAL is a direct parametric equivalent to the S1GALH. Both components are manufactured by Taiwan Semiconductor Corporation and share identical electrical specifications, mechanical packaging, and compliance certifications. Both parts are Active product status, ROHS3 compliant, and qualified to AEC-Q101 automotive standards. Selection between these parts is based on availability and supply chain requirements, as all functional and environmental parameters are equivalent.

Frequently Asked Questions (FAQ)

Q: Can S1GAL be used as a direct replacement for S1GALH?

A: Yes. The S1GAL meets all electrical and mechanical parameters specified for the S1GALH, including voltage rating, current capacity, forward voltage drop, recovery speed, reverse leakage current, and package configuration. Both components are identical in functional performance.

Q: Are there any differences in compliance or qualification between S1GALH and S1GAL?

A: No. Both parts carry identical compliance certifications: ROHS3 compliant, REACH unaffected, and AEC-Q101 automotive qualification. Both are rated for the same operating temperature range of -55°C to 150°C junction temperature.

Q: What is the significance of the DO-221AC SMA package for substitution?

A: The DO-221AC SMA Flat Leads package is the mechanical interface for both parts. Substitution is valid only when the package designation remains identical, ensuring compatibility with existing PCB layouts, solder reflow profiles, and automated assembly equipment.

Q: How do the electrical parameters determine substitution eligibility?

A: Substitution eligibility is determined by matching all critical electrical parameters: 400V reverse voltage rating, 1A average rectified current, 1.1V maximum forward voltage at 1A, standard recovery speed characteristics, 1µA reverse leakage current at 400V, and 8pF capacitance at 4V and 1MHz. Any deviation in these parameters disqualifies a part as a direct substitute.

Q: Is there a difference in moisture sensitivity between these parts?

A: No. Both S1GALH and S1GAL are rated at MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage, handling, or reflow processing.