RF101LAM4STFTR Equivalent & Substitute Parts Reference

Part Overview

The RF101LAM4STFTR by Rohm Semiconductor is an automotive-grade, fast recovery rectifier diode with a reverse voltage rating of 400 V and an average rectified current of 1A. It is designed for general-purpose rectification applications and utilizes surface mount technology in a SOD-128 (PMDTM) package. The product is currently active, with RoHS3 and AEC-Q101 compliance and unrestricted moisture sensitivity (MSL: 1). Alternative models may be required to address sourcing constraints or inventory availability while maintaining identical electrical and mechanical characteristics for reliable substitution.

Key Parameters

Parameter	Value
Manufacturer Part Number	RF101LAM4STFTR
Manufacturer	Rohm Semiconductor
Category	Diodes, Rectifiers
Packaging	Cut Tape (CT) & Digi-Reel®
Description	Diode 400 V 1A Surface Mount PMDTM
Product Status	Active
Technology	Standard
Voltage - DC Reverse (Vr) (Max)	400 V
Current - Average Rectified (Io)	1A
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 1A
Speed	Fast Recovery =< 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	25 ns
Current - Reverse Leakage @ Vr	10 µA @ 400 V
Grade	Automotive
Qualification	AEC-Q101
Mounting Type	Surface Mount
Package / Case	SOD-128
Supplier Device Package	PMDTM
Operating Temperature - Junction	150°C (Max)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99

Substitute Part Grouping Explanation

Substitution within the Diodes, Rectifiers category is determined by matching key parameters: voltage rating, current rating, recovery speed, mounting style, package type, compliance, and product status. Only parts exhibiting identical values for reverse voltage (400 V), average rectified current (1A), reverse leakage, recovery time, forward voltage, automotive grade, AEC-Q101 qualification, surface mount configuration, package/case (SOD-128), supplier device package (PMDTM), operating temperature (150°C max), RoHS3 status, MSL rating, and REACH compliance are considered valid substitutes. All listed substitutes comply strictly with these requirements.

Parameter Comparison

Parameter	RF101LAM4STFTR	RF101LAM4STR	RF071LAM4STR	RF071LAM4STFTR
Manufacturer	Rohm Semiconductor	Rohm Semiconductor	Rohm Semiconductor	Rohm Semiconductor
Category	Diodes, Rectifiers	Diodes, Rectifiers	Diodes, Rectifiers	Diodes, Rectifiers
Packaging	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®
Description	Diode 400 V 1A Surface Mount PMDTM	Diode 400 V 1A Surface Mount PMDTM	Diode 400 V 1A Surface Mount PMDTM	Diode 400 V 1A Surface Mount PMDTM
Product Status	Active	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V	400 V
Current - Average Rectified (Io)	1A	1A	1A	1A
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 1A	1.25 V @ 1A	1.25 V @ 700 mA	1.25 V @ 700 mA
Speed	Fast Recovery =< 500ns, > 200mA (Io)	Fast Recovery =< 500ns, > 200mA (Io)	Fast Recovery =< 500ns, > 200mA (Io)	Fast Recovery =< 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	25 ns	25 ns	25 ns	25 ns
Current - Reverse Leakage @ Vr	10 µA @ 400 V	10 µA @ 400 V	10 µA @ 400 V	10 µA @ 400 V
Grade	Automotive	Automotive	Automotive	Automotive
Qualification	AEC-Q101	AEC-Q101	AEC-Q101	AEC-Q101
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOD-128	SOD-128	SOD-128	SOD-128
Supplier Device Package	PMDTM	PMDTM	PMDTM	PMDTM
Operating Temperature - Junction	150°C (Max)	150°C (Max)	150°C (Max)	150°C (Max)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99	EAR99	EAR99

Engineering Selection Recommendations

All substitute parts listed (RF101LAM4STR, RF071LAM4STR, RF071LAM4STFTR) share the same product status (active), compliance levels (RoHS3, REACH, AEC-Q101), moisture sensitivity level (1), and identical key mechanical and electrical parameters as the main part number RF101LAM4STFTR. Selection among these parts is supported for automotive and industrial applications where matched compliance and package form factor are required.

Frequently Asked Questions (FAQ)

Q1: What are the main criteria for substituting RF101LAM4STFTR in automotive rectifier applications?
A1: Substitution requires identical reverse voltage (400 V), average rectified current (1A), recovery speed, mounting configuration (surface mount, SOD-128 / PMDTM package), grade (automotive), and compliance (AEC-Q101, RoHS3, REACH).

Q2: Are all substitute diodes compatible with automated surface-mount assembly processes?
A2: All listed substitutes feature surface-mount SOD-128 (PMDTM) packaging and are MSL 1 rated, enabling full compatibility with automated SMT assembly and unrestricted storage conditions.

Q3: Do differences in Voltage - Forward (Vf) @ If current affect part interchangeability?
A3: All substitutes meet the specified maximum Vf of 1.25 V, with current rating specified either at 1A or 700 mA as provided. Substitutes are considered interchangeable based strictly on matching key parameters.

Q4: Do substitutes maintain the same automotive qualifications and compliance?
A4: Yes, all substitutes are AEC-Q101 qualified, automotive grade, ROHS3 compliant, and REACH unaffected as per provided data.

Q5: Is device performance affected by selecting parts with identical parametric values across series?
A5: Substitution is based on matching electrical ratings, mechanical form factor, and compliance. Device performance is maintained when key parameters are identical.

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