CDBQR43-HF Schottky Diode 30V 200mA 0402 Equivalent & Substitute Parts

Part Overview

The CDBQR43-HF is a Schottky rectifier diode manufactured by Comchip Technology, rated for 30V DC reverse voltage and 200mA average rectified current in a 0402 (1006 Metric) surface mount package. This component is classified as Last Time Buy, indicating limited future availability. Equivalent and substitute parts are necessary to ensure design continuity, maintain supply chain flexibility, and support long-term production requirements for applications utilizing this diode specification.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	30	V
Current - Average Rectified (Io)	200	mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 200 mA	V @ mA
Reverse Recovery Time (trr)	5	ns
Current - Reverse Leakage @ Vr	500 nA @ 25 V	nA @ V
Capacitance @ Vr, F	10 pF @ 1V, 1MHz	pF @ V, MHz
Package / Case	0402 (1006 Metric)	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction (Max)	125	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the CDBQR43-HF is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 30 V (exact match required)
Current - Average Rectified (Io): 200 mA (exact match required)
Technology: Schottky (exact match required)
Mounting Type: Surface Mount (exact match required)
Package compatibility: 0402 (1006 Metric) or equivalent footprint

Secondary Compatibility Parameters:

Reverse Recovery Time (trr): 5 ns (nominal)
Capacitance @ Vr, F: 10 pF @ 1V, 1MHz (nominal)
Operating Temperature - Junction: 125°C or higher acceptable
RoHS3 Compliance: Required

Substitute parts are grouped into two categories:

Category 1: Comchip Technology Direct Equivalents (CDBQR Series) Parts CDBQR42, CDBQR42-HF, CDBQR43, CDBQR54, and CDBQR54-HF meet all primary electrical specifications. Minor variations in forward voltage measurement conditions and reverse leakage current exist but do not affect functional substitution within the 30V/200mA rating envelope.

Category 2: Cross-Manufacturer Equivalents Parts BAT5402LRHE6327XTSA1 (Infineon Technologies) and PMEG3002AELD,315 (Nexperia USA Inc.) meet all primary electrical specifications but employ different package formats (SOD-882 and DFN1006D-2 respectively). These require PCB layout modification and are suitable only when package redesign is feasible.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) [V]	trr [ns]	Ir @ Vr [nA/µA]	Package	Tj (Max) [°C]	Product Status
CDBQR43-HF	Comchip Technology	30	200	1 @ 200 mA	5	500 nA @ 25 V	0402	125	Last Time Buy
CDBQC43-HF	Comchip Technology	30	200	1 @ 200 mA	5	500 nA @ 25 V	0402	125	Active
CDBQR42	Comchip Technology	30	200	1 @ 200 mA	5	500 nA @ 25 V	0402	125	Active
CDBQR42-HF	Comchip Technology	30	200	1 @ 200 mA	5	500 nA @ 25 V	0402	125	Last Time Buy
CDBQR43	Comchip Technology	30	200	1 @ 200 mA	5	500 nA @ 25 V	0402	125	Active
CDBQR54	Comchip Technology	30	200	1 @ 100 mA	5	2 µA @ 25 V	0402	125	Active
CDBQR54-HF	Comchip Technology	30	200	1 @ 100 mA	5	2 µA @ 25 V	0402	125	Last Time Buy
BAT5402LRHE6327XTSA1	Infineon Technologies	30	200	0.8 @ 100 mA	5	2 µA @ 25 V	SOD-882	150	Active
PMEG3002AELD,315	Nexperia USA Inc.	30	200	0.48 @ 200 mA	6	50 µA @ 30 V	DFN1006D-2	150	Active

Engineering Selection Recommendations

Tier 1: Direct Pin-Compatible Substitutes (No PCB Modification Required)

CDBQC43-HF, CDBQR42, CDBQR42-HF, CDBQR43, CDBQR54, and CDBQR54-HF are all Comchip Technology Schottky diodes in 0402 package format with identical footprints and mounting requirements. These parts are electrically equivalent within the 30V/200mA specification envelope and require no PCB layout changes.

Among these, CDBQR43 and CDBQR54 are recommended as primary alternatives due to Active product status, ensuring long-term availability and supply continuity. CDBQC43-HF is also recommended as an Active status alternative with identical electrical characteristics to the main part.

Tier 2: Cross-Manufacturer Substitutes (PCB Layout Modification Required)

BAT5402LRHE6327XTSA1 (Infineon Technologies) and PMEG3002AELD,315 (Nexperia USA Inc.) meet all electrical specifications but employ different package formats. These substitutes are suitable only when PCB redesign is feasible and acceptable within project constraints. Both parts carry Active product status and higher maximum junction temperatures (150°C), providing thermal margin advantages in high-temperature applications.

Compliance and Certification: All recommended substitutes maintain ROHS3 compliance, REACH Unaffected status, and EAR99 export classification, matching the regulatory profile of the main part CDBQR43-HF.

Frequently Asked Questions (FAQ)

Q1: Can CDBQR54 or CDBQR54-HF be used as direct replacements for CDBQR43-HF?

A: Yes. Both CDBQR54 and CDBQR54-HF are electrically equivalent within the 30V/200mA specification. Minor differences exist in forward voltage measurement conditions (1V @ 100mA versus 1V @ 200mA) and reverse leakage current (2µA @ 25V versus 500nA @ 25V), but these variations do not affect functional performance in standard rectification applications. Both parts use identical 0402 package format and require no PCB modification.

Q2: What is the difference between CDBQR43-HF and CDBQC43-HF?

A: CDBQC43-HF is the Active product status equivalent of CDBQR43-HF. Both parts are manufactured by Comchip Technology with identical electrical specifications, package format, and performance characteristics. CDBQC43-HF is recommended for new designs requiring long-term supply assurance, while CDBQR43-HF is Last Time Buy status.

Q3: Can BAT5402LRHE6327XTSA1 replace CDBQR43-HF without PCB changes?

A: No. BAT5402LRHE6327XTSA1 uses SOD-882 package format, which has a different footprint than the 0402 package of CDBQR43-HF. PCB layout modification is required. This substitute is suitable only when design flexibility permits package change and PCB redesign.

Q4: Are there performance differences between CDBQR42 and CDBQR43?

A: No. Both CDBQR42 and CDBQR43 are Comchip Technology Schottky diodes with identical electrical specifications: 30V reverse voltage, 200mA average rectified current, 1V forward voltage @ 200mA, 5ns reverse recovery time, and 0402 package format. Both are suitable as direct substitutes for CDBQR43-HF.

Q5: Why does PMEG3002AELD,315 show lower forward voltage than CDBQR43-HF?

A: PMEG3002AELD,315 is manufactured by Nexperia USA Inc. using different semiconductor process technology. The forward voltage specification (0.48V @ 200mA) reflects this manufacturing difference. Despite lower forward voltage, the part meets the 30V/200mA electrical envelope and is functionally equivalent. However, the DFN1006D-2 package requires PCB redesign.

Q6: What is the significance of Product Status (Active vs. Last Time Buy)?

A: Product Status indicates manufacturer supply commitment. Active status parts have indefinite availability and are recommended for new designs. Last Time Buy status indicates the manufacturer will discontinue production after current inventory is depleted. CDBQR43-HF is Last Time Buy; therefore, Active status alternatives (CDBQR43, CDBQR54, CDBQC43-HF) are recommended for designs requiring long-term production support.

Q7: Can CDBQR54-HF be used in high-temperature applications where CDBQR43-HF is marginal?

A: CDBQR54-HF has identical maximum junction temperature (125°C) as CDBQR43-HF. For applications requiring higher thermal margin, BAT5402LRHE6327XTSA1 or PMEG3002AELD,315 offer 150°C maximum junction temperature. However, these alternatives require package format changes and PCB redesign.

Q8: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitute parts (CDBQC43-HF, CDBQR42, CDBQR42-HF, CDBQR43, CDBQR54, CDBQR54-HF, BAT5402LRHE6327XTSA1, and PMEG3002AELD,315) are ROHS3 compliant and REACH Unaffected, matching the regulatory compliance of CDBQR43-HF.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message