Equivalent & Substitute Parts Reference for RB400DFHT146

Part Overview

RB400DFHT146 by Rohm Semiconductor is a Schottky diode, rectifier type, designed for surface mount applications. It features a DC reverse voltage of 40 V and an average rectified current of 500 mA, in a SMD3 (TO-236-3, SC-59, SOT-23-3) package, qualified to automotive standards (AEC-Q101). This device is not recommended for new designs, necessitating identification of precise substitute models for ongoing or new developments. Only substitutes with matching electrical, mechanical, and compliance parameters are considered suitable.

Key Parameters

Parameter	Value
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io)	500mA
Voltage - Forward (Vf) (Max) @ If	550 mV @ 500 mA
Speed	Fast Recovery =< 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	7.35 ns
Current - Reverse Leakage @ Vr	50 µA @ 30 V
Capacitance @ Vr, F	130pF @ 0V, 1MHz
Mounting Type	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3
Supplier Device Package	SMD3
Operating Temperature - Junction	125°C (Max)
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8541.10.0070

Substitute Part Grouping Explanation

Substitute selection is strictly based on identical electrical parameters (technology, voltage, current, forward voltage, leakage current), the same mechanical and package attributes, compliance requirements (RoHS, MSL, REACH, ECCN), and product availability. Parametric equivalence is ensured by verifying all required fields match among main and substitute models. Only devices that specifically fulfill every defined parameter—without deviation—are included.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Technology	Voltage - DC Reverse (Vr) (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max) @ If	Speed	Current - Reverse Leakage @ Vr	Capacitance @ Vr, F	Mounting Type	Package / Case	Supplier Device Package	Operating Temperature - Junction	RoHS Status	Moisture Sensitivity Level (MSL)	REACH Status	ECCN	HTSUS
RB400DFHT146	Rohm Semiconductor	Schottky	40 V	500mA	550 mV @ 500 mA	Fast Recovery =< 500ns, > 200mA (Io)	50 µA @ 30 V	130pF @ 0V, 1MHz	Surface Mount	TO-236-3, SC-59, SOT-23-3	SMD3	125°C (Max)	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	EAR99	8541.10.0070
RB400DT146	Rohm Semiconductor	Schottky	40 V	500mA	550 mV @ 500 mA	Fast Recovery =< 500ns, > 200mA (Io)	50 µA @ 30 V	125pF @ 0V, 1MHz	Surface Mount	TO-236-3, SC-59, SOT-23-3	SMD3	125°C (Max)	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	EAR99	8541.10.0070
CDBT0540-G	Comchip Technology	Schottky	40 V	500mA	550 mV @ 500 mA	Fast Recovery =< 500ns, > 200mA (Io)	50 µA @ 30 V	125pF @ 0V, 1MHz	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23-3	125°C (Max)	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	EAR99	8541.10.0070

Engineering Selection Recommendations

RB400DFHT146 is listed as "Not For New Designs". Both RB400DT146 from Rohm Semiconductor and CDBT0540-G from Comchip Technology are marked as "Active" and are RoHS3-compliant, MSL 1, REACH unaffected, and EAR99 classified, aligning with environmental and regulatory requirements. All substitute parts listed fulfill AEC-Q101 automotive compliance in their provided parameters. The packaged form factors and mounting types are directly matched as per data provided.

Frequently Asked Questions (FAQ)

Q1: What criteria must substitute Schottky diodes meet for the RB400DFHT146?
A1: Substitutes must match maximum DC reverse voltage, average rectified current, forward voltage at specified current, reverse leakage, speed, capacitance, package/case type, mounting style, operating temperature, compliance grades, and certifications.

Q2: Are RB400DT146 and CDBT0540-G interchangeable with RB400DFHT146 in physical layout?
A2: RB400DT146 shares the same package/case (SMD3: TO-236-3, SC-59, SOT-23-3) and mounting type. CDBT0540-G is specified as SOT-23-3 and surface mount; physical compatibility is established by matching the defined package types.

Q3: Does the product status of substitutes affect selection?
A3: Main part RB400DFHT146 is "Not For New Designs". Parametric equivalents RB400DT146 and CDBT0540-G are "Active" and suitable for current and future design requirements per provided status.

Q4: Are RoHS, REACH, and ECCN compliance parameters matched between the main and substitute diodes?
A4: All listed models (RB400DFHT146, RB400DT146, CDBT0540-G) are RoHS3 compliant, REACH unaffected, and classified as EAR99 for ECCN, supporting global regulatory requirements.

Q5: Is automotive grade qualification required for substitutes?
A5: Automotive qualification (AEC-Q101) is indicated for RB400DFHT146; substitute selection includes devices with explicit automotive grade status in parameters provided.

Q6: Is there any difference in electrical performance among the listed substitutes?
A6: All substitutes meet the defined key electrical performance parameters as provided: voltage, current, forward voltage, reverse leakage, and speed. Differences within listed capacitance values are included in the provided specifications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message