RB521G-30-TP Equivalent & Substitute Parts

Part Overview

The RB521G-30-TP is a Schottky rectifier diode manufactured by Micro Commercial Co, rated for 30 V DC reverse voltage and 100 mA average rectified current in a surface mount SOD-723 package. This component is classified as obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Key Parameters

Parameter	Value
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	30 V
Current - Average Rectified (Io)	100 mA
Voltage - Forward (Vf) (Max) @ If	350 mV @ 10 mA
Current - Reverse Leakage @ Vr	10 µA @ 10 V
Mounting Type	Surface Mount
Package / Case	SOD-723
Operating Temperature - Junction (Max)	125°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the RB521G-30-TP is determined by the following critical parameters:

Electrical Parameters (Must Match or Exceed):

Voltage - DC Reverse (Vr) (Max): 30 V minimum
Current - Average Rectified (Io): 100 mA minimum
Technology: Schottky
Speed Classification: Small Signal ≤ 200 mA (Io), Any Speed

Mechanical Parameters (Must Be Compatible):

Mounting Type: Surface Mount
Package / Case: SOD-723 or equivalent footprint (0503/SOD-723F)

Compliance Parameters (Must Maintain):

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into two categories:

Category 1 - Parametric Equivalents: Parts with identical electrical specifications and compatible packaging. These parts provide direct functional replacement with no circuit redesign required.

Category 2 - Functional Substitutes: Parts with equal or superior electrical ratings and compatible packaging. These parts may have different forward voltage characteristics or reverse leakage specifications but maintain the same voltage and current ratings.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Ir @ Vr	Package / Case	Tj (Max)	Product Status
RB521G-30-TP	Micro Commercial Co	30 V	100 mA	350 mV @ 10 mA	10 µA @ 10 V	SOD-723	125°C	Obsolete
RB521G-30HF	Comchip Technology	30 V	100 mA	350 mV @ 10 mA	10 µA @ 10 V	SOD-723	125°C	Active
CDBER0130L	Comchip Technology	30 V	100 mA	350 mV @ 10 mA	10 µA @ 10 V	0503 (1308 Metric)	125°C	Active
RB500SM-30T2R	Rohm Semiconductor	30 V	100 mA	450 mV @ 10 mA	500 nA @ 10 V	SC-79, SOD-523	150°C	Active
RB500SM-30FHT2R	Rohm Semiconductor	30 V	100 mA	450 mV @ 10 mA	500 nA @ 10 V	SC-79, SOD-523	150°C	Active
NSR0230M2T5G	onsemi	30 V	200 mA	500 mV @ 200 mA	100 µA @ 30 V	SOD-723	125°C	Active

Engineering Selection Recommendations

Parametric Equivalent (Direct Replacement):

RB521G-30HF is the primary parametric equivalent. This part is manufactured by Comchip Technology and maintains identical electrical specifications to the RB521G-30-TP, including 30 V reverse voltage, 100 mA average rectified current, 350 mV forward voltage at 10 mA, and 10 µA reverse leakage at 10 V. The part is in active product status with high inventory availability (37,867 pcs). Packaging is SOD-723, matching the original specification. This part requires no circuit modification and provides direct functional replacement.

Footprint-Compatible Equivalent:

CDBER0130L is manufactured by Comchip Technology and provides identical electrical specifications with a 0503 (1308 Metric) package designation, which is footprint-compatible with SOD-723/SOD-723F. This part is in active product status with 939 pcs in stock. The electrical performance is identical to the main part, making it suitable for applications where package footprint compatibility is confirmed.

Functional Substitutes with Enhanced Specifications:

RB500SM-30T2R and RB500SM-30FHT2R are manufactured by Rohm Semiconductor. Both parts maintain the 30 V reverse voltage and 100 mA average rectified current ratings. These parts feature improved reverse leakage characteristics (500 nA @ 10 V versus 10 µA @ 10 V) and higher maximum junction temperature (150°C versus 125°C). Forward voltage is specified at 450 mV @ 10 mA. Package designation is SC-79/SOD-523. Both parts are in active product status. RB500SM-30T2R has higher inventory availability (6,801 pcs) compared to RB500SM-30FHT2R (842 pcs). These parts are suitable for applications requiring improved thermal performance or lower leakage characteristics.

Higher Current Rated Substitute:

NSR0230M2T5G is manufactured by onsemi and provides a 200 mA average rectified current rating, which exceeds the 100 mA requirement of the original part. The 30 V reverse voltage rating is maintained. This part is in active product status with extensive inventory availability (37,300 pcs). The SOD-723 package matches the original specification. This part is suitable for applications where current margin or future design flexibility is required.

All substitute parts maintain ROHS3 compliance, MSL 1 (Unlimited) rating, and REACH unaffected status, consistent with the original part specifications.

Frequently Asked Questions (FAQ)

Q: Can RB521G-30HF be used as a direct replacement for RB521G-30-TP?

A: Yes. RB521G-30HF is a parametric equivalent with identical electrical specifications (30 V, 100 mA, 350 mV forward voltage, 10 µA reverse leakage) and SOD-723 packaging. No circuit modification is required. The part is in active product status with high availability.

Q: What is the difference between CDBER0130L and RB521G-30HF?

A: Both parts have identical electrical specifications. The primary difference is packaging designation: CDBER0130L uses 0503 (1308 Metric) designation while RB521G-30HF uses SOD-723. These packages are footprint-compatible. Confirm PCB layout compatibility before selection.

Q: Can NSR0230M2T5G replace RB521G-30-TP in all applications?

A: NSR0230M2T5G has a higher current rating (200 mA versus 100 mA) and maintains the 30 V voltage specification. It is electrically compatible and can be used in applications designed for the RB521G-30-TP. The higher current rating provides additional design margin. Verify that forward voltage characteristics (500 mV @ 200 mA) are acceptable for the specific application.

Q: Why do RB500SM-30T2R and RB500SM-30FHT2R have different package designations than the original part?

A: RB500SM-30T2R and RB500SM-30FHT2R use SC-79/SOD-523 package designation, which differs from the SOD-723 package of the original part. These packages have different physical dimensions and PCB footprints. Confirm PCB layout compatibility before selection. Both parts maintain the same electrical specifications (30 V, 100 mA).

Q: What is the significance of the reverse leakage difference between RB521G-30-TP and RB500SM-30T2R?

A: RB521G-30-TP specifies 10 µA reverse leakage at 10 V, while RB500SM-30T2R specifies 500 nA reverse leakage at 10 V. The lower leakage in RB500SM-30T2R represents improved performance and may be beneficial in low-power or precision applications. Both parts meet the 30 V and 100 mA specifications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and REACH unaffected status, consistent with the original RB521G-30-TP specification.

Q: What is the difference between Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR) packaging?

A: Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR) are different supply formats for the same component. Both formats contain the same electronic component. Selection depends on manufacturing process requirements and inventory management practices. Electrical and mechanical specifications remain identical.

Q: Can I use RB500SM-30FHT2R if RB500SM-30T2R is unavailable?

A: Yes. Both RB500SM-30T2R and RB500SM-30FHT2R are manufactured by Rohm Semiconductor with identical electrical specifications and packaging. The primary difference is supply format (Tape & Reel versus Cut Tape & Digi-Reel®). Both parts are suitable for the same applications.

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