MSS1P4HM3/89A Equivalent & Substitute Parts

Part Overview

The MSS1P4HM3/89A is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 40 V DC reverse voltage and 1 A average rectified current. The device is packaged in MicroSMP (DO-219AD) surface mount configuration and qualifies for automotive applications under AEC-Q101 certification.

The MSS1P4HM3/89A carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications utilizing this component.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 1 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	200	µA @ 40 V
Capacitance @ Vr, F	50	pF @ 4V, 1MHz
Operating Temperature - Junction	-55 to 150	°C
Package / Case	MicroSMP (DO-219AD)	—
Mounting Type	Surface Mount	—
Technology	Schottky	—

Substitute Part Grouping Explanation

Substitution of the MSS1P4HM3/89A is determined by strict electrical and mechanical parameter matching across the following criteria:

Electrical Parameters (Critical for Functional Equivalence):

Voltage - DC Reverse (Vr) (Max): 40 V
Current - Average Rectified (Io): 1 A
Voltage - Forward (Vf) (Max) @ If: 550 mV @ 1 A
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr: 200 µA @ 40 V
Capacitance @ Vr, F: 50 pF @ 4V, 1MHz
Operating Temperature - Junction: -55°C to 150°C

Mechanical Parameters (Critical for Physical Compatibility):

Package / Case: MicroSMP (DO-219AD)
Mounting Type: Surface Mount
Technology: Schottky

All identified substitute parts maintain identical electrical ratings and mechanical specifications. Variations in packaging format (Cut Tape, Digi-Reel, or Tape & Reel) and product status do not affect functional equivalence.

Parameter Comparison

Parameter	MSS1P4HM3/89A	MSS1P4-M3/89A	MSS1P4HM3_A/H
Manufacturer	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division
Category	Diodes, Rectifiers	Diodes, Rectifiers	Diodes, Rectifiers
Technology	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	40 V	40 V	40 V
Current - Average Rectified (Io)	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 1 A	550 mV @ 1 A	550 mV @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	200 µA @ 40 V	200 µA @ 40 V	200 µA @ 40 V
Capacitance @ Vr, F	50 pF @ 4V, 1MHz	50 pF @ 4V, 1MHz	50 pF @ 4V, 1MHz
Operating Temperature - Junction	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C
Package / Case	MicroSMP (DO-219AD)	MicroSMP (DO-219AD)	MicroSMP (DO-219AD)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

MSS1P4-M3/89A is suitable for applications requiring Cut Tape or Digi-Reel packaging formats. This part carries Active product status and maintains full electrical and mechanical equivalence to the obsolete MSS1P4HM3/89A. The part is ROHS3 compliant and REACH unaffected, meeting regulatory requirements for new designs and production continuity.

MSS1P4HM3_A/H is suitable for applications requiring Tape & Reel packaging format. This part carries Active product status and maintains full electrical and mechanical equivalence to the obsolete MSS1P4HM3/89A. The part qualifies for automotive applications under AEC-Q101 certification, matching the qualification level of the original part. The part is ROHS3 compliant and REACH unaffected.

Both substitute parts are manufactured by the same supplier (Vishay General Semiconductor - Diodes Division) and share the common base product number MSS1P4. Selection between MSS1P4-M3/89A and MSS1P4HM3_A/H depends on packaging and supply chain requirements rather than electrical performance.

Frequently Asked Questions (FAQ)

Q: Can MSS1P4-M3/89A and MSS1P4HM3_A/H be used interchangeably with MSS1P4HM3/89A?

A: Yes. Both parts are parametric equivalents with identical electrical ratings (40 V reverse voltage, 1 A average rectified current, 550 mV forward voltage at 1 A) and mechanical specifications (MicroSMP DO-219AD package, surface mount configuration). Differences in packaging format (Cut Tape/Digi-Reel versus Tape & Reel) do not affect functional compatibility in the circuit.

Q: Why is the MSS1P4HM3/89A marked as Obsolete?

A: The MSS1P4HM3/89A carries Obsolete product status. The substitute parts MSS1P4-M3/89A and MSS1P4HM3_A/H are both Active products from the same manufacturer and provide direct functional replacement.

Q: Are there differences in automotive qualification between the substitute parts?

A: The MSS1P4HM3_A/H explicitly carries AEC-Q101 automotive qualification. The MSS1P4-M3/89A does not list automotive qualification in the provided specifications. For applications requiring automotive-grade components, MSS1P4HM3_A/H is the appropriate selection.

Q: What is the difference between Cut Tape/Digi-Reel and Tape & Reel packaging?

A: Cut Tape and Digi-Reel are packaging formats suitable for lower-volume or manual assembly operations. Tape & Reel is the standard format for high-volume automated assembly. The electrical and mechanical performance of the diode is identical across all packaging formats.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. MSS1P4-M3/89A and MSS1P4HM3_A/H are both ROHS3 compliant and REACH unaffected, matching the compliance status of the original MSS1P4HM3/89A.

Q: What is the Moisture Sensitivity Level (MSL) for these parts?

A: All three parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

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