S1DAL Equivalent & Substitute Parts

Part Overview

The S1DAL is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 200 V DC reverse voltage and 1 A average rectified current in a surface mount Thin SMA package. This component is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1). Substitute parts are identified when equivalent electrical and mechanical parameters are required for design flexibility, inventory management, or supply chain continuity while maintaining identical functional performance in circuit applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.1 @ 1 A	V
Speed	Standard Recovery >500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	1	µA @ 200 V
Capacitance @ Vr, F	8	pF @ 4V, 1MHz
Package / Case	DO-221AC, SMA Flat Leads	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the S1DAL is determined by strict equivalence across the following critical parameters:

Reverse Voltage Rating: 200 V maximum
Forward Current Rating: 1 A average rectified current
Forward Voltage Drop: 1.1 V maximum at 1 A
Recovery Speed: Standard recovery >500 ns at >200 mA
Reverse Leakage Current: 1 µA at 200 V
Junction Capacitance: 8 pF at 4 V, 1 MHz
Package Type: DO-221AC, SMA Flat Leads (Thin SMA)
Operating Temperature Range: -55°C to 150°C
Compliance: RoHS3 compliant, MSL 1

The S1DALH is identified as a parametric equivalent substitute. Both parts maintain identical electrical specifications and mechanical packaging, with the S1DALH additionally qualified to AEC-Q101 automotive standards.

Parameter Comparison

Parameter	S1DAL	S1DALH	Match
Manufacturer	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Yes
Category	Diodes, Rectifiers	Diodes, Rectifiers	Yes
Voltage - DC Reverse (Vr) (Max)	200 V	200 V	Yes
Current - Average Rectified (Io)	1 A	1 A	Yes
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A	1.1 V @ 1 A	Yes
Speed	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	Yes
Current - Reverse Leakage @ Vr	1 µA @ 200 V	1 µA @ 200 V	Yes
Capacitance @ Vr, F	8 pF @ 4V, 1MHz	8 pF @ 4V, 1MHz	Yes
Package / Case	DO-221AC, SMA Flat Leads	DO-221AC, SMA Flat Leads	Yes
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	Yes
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Yes
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Yes
Product Status	Active	Active	Yes
Qualification	Standard	AEC-Q101	Partial

Engineering Selection Recommendations

Both S1DAL and S1DALH are Active product status components suitable for direct substitution based on electrical and mechanical parameter equivalence. The S1DALH carries additional AEC-Q101 automotive qualification, which extends its applicability to automotive-grade circuit designs while maintaining full compatibility with standard industrial applications. Selection between these parts depends on application requirements: the S1DAL is appropriate for general industrial rectification circuits, while the S1DALH is specified for automotive and mission-critical applications requiring automotive-grade component qualification. Both parts comply with RoHS3 and REACH requirements with unlimited moisture sensitivity level, supporting standard surface mount assembly processes without special handling.

Frequently Asked Questions (FAQ)

Q: Can S1DALH replace S1DAL in any application?

A: Yes. The S1DALH is a parametric equivalent with identical electrical specifications (200 V reverse voltage, 1 A forward current, 1.1 V forward voltage drop) and mechanical packaging (DO-221AC, SMA Flat Leads). The S1DALH additionally carries AEC-Q101 automotive qualification, making it suitable for both standard and automotive applications.

Q: Can S1DAL replace S1DALH?

A: S1DAL shares identical electrical and mechanical parameters with S1DALH. However, S1DAL lacks AEC-Q101 automotive qualification. Use S1DAL only in applications where automotive-grade qualification is not required.

Q: Are there package compatibility concerns between these parts?

A: No. Both S1DAL and S1DALH use the DO-221AC package with SMA Flat Leads (Thin SMA). They are mechanically and electrically interchangeable in surface mount applications without PCB layout modifications.

Q: What is the difference between S1DAL and S1DALH?

A: The primary difference is qualification level. S1DALH is qualified to AEC-Q101 automotive standards, while S1DAL is standard grade. All electrical parameters, thermal ratings (-55°C to 150°C junction temperature), and compliance certifications (RoHS3, REACH) are identical.

Q: Are both parts RoHS3 compliant?

A: Yes. Both S1DAL and S1DALH are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level), suitable for standard surface mount assembly without special moisture control requirements.

Q: What is the reverse recovery time specification?

A: Both parts specify Standard Recovery >500 ns at >200 mA forward current, indicating typical rectifier-grade recovery characteristics suitable for general-purpose rectification applications.

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