KBJ4005G Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The KBJ4005G is a single-phase bridge rectifier manufactured by Diodes Incorporated, rated for 50 V peak reverse voltage and 4 A average rectified current. This component is designed for through-hole mounting in the 4-SIP KBJ package configuration. The part is currently active in production with 2,620 units in stock and maintains ROHS3 compliance and REACH unaffected status.

Substitute parts are necessary when application requirements differ in voltage rating, current capacity, or when inventory availability requires alternative sourcing within the same product family and package type.

Key Parameters

Parameter	Value
Manufacturer Part Number	KBJ4005G
Manufacturer	Diodes Incorporated
Category	Diodes
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	50 V
Current - Average Rectified (Io)	4 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 2 A
Current - Reverse Leakage @ Vr	5 µA @ 50 V
Operating Temperature Range	-65°C to 150°C (TJ)
Mounting Type	Through Hole
Package / Case	4-SIP, KBJ
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution of the KBJ4005G is determined by three critical parameters: voltage rating (peak reverse voltage), current rating (average rectified current), and package type. All substitute parts listed maintain identical mounting type (through hole) and package configuration (4-SIP KBJ), ensuring mechanical and electrical compatibility at the board level.

Substitute parts are grouped into two current categories:

4 A Current Rating Group: KBJ401G, KBJ402G, KBJ404G, KBJ406G, KBJ408G, KBJ410G — voltage ratings range from 100 V to 1 kV.

6 A Current Rating Group: KBJ601G, KBJ604G, KBJ606G, KBJ608G — voltage ratings range from 100 V to 800 V.

The KBJ4005G operates at 50 V and 4 A. Parts within the 4 A group with equal or higher voltage ratings (KBJ401G at 100 V and above) are direct substitutes. Parts in the 6 A group represent higher current capacity alternatives and are suitable only when the application can accommodate increased current handling without circuit modification.

Parameter Comparison

Part Number	Voltage - Peak Reverse (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max) @ If	Current - Reverse Leakage @ Vr	Operating Temperature	Package / Case	Inventory (Pcs)
KBJ4005G	50 V	4 A	1 V @ 2 A	5 µA @ 50 V	-65°C to 150°C	4-SIP, KBJ	2,620
KBJ401G	100 V	4 A	1 V @ 2 A	5 µA @ 100 V	-65°C to 150°C	4-SIP, KBJ	747
KBJ402G	200 V	4 A	1 V @ 2 A	5 µA @ 200 V	-65°C to 150°C	4-SIP, KBJ	669
KBJ404G	400 V	4 A	1 V @ 2 A	5 µA @ 400 V	-65°C to 150°C	4-SIP, KBJ	928
KBJ406G	600 V	4 A	1 V @ 2 A	5 µA @ 600 V	-65°C to 150°C	4-SIP, KBJ	10,400
KBJ408G	800 V	4 A	1 V @ 2 A	5 µA @ 800 V	-65°C to 150°C	4-SIP, KBJ	2,154
KBJ410G	1 kV	4 A	1 V @ 2 A	5 µA @ 1000 V	-65°C to 150°C	4-SIP, KBJ	800
KBJ601G	100 V	6 A	1 V @ 3 A	5 µA @ 100 V	-65°C to 150°C	4-SIP, KBJ	3,672
KBJ604G	400 V	6 A	1 V @ 3 A	5 µA @ 400 V	-65°C to 150°C	4-SIP, KBJ	2,294
KBJ606G	600 V	6 A	1 V @ 3 A	5 µA @ 600 V	-65°C to 150°C	4-SIP, KBJ	1,348
KBJ608G	800 V	6 A	1 V @ 3 A	5 µA @ 800 V	-65°C to 150°C	4-SIP, KBJ	30,400

Engineering Selection Recommendations

All listed substitute parts maintain active product status with Diodes Incorporated and carry identical ROHS3 compliance and REACH unaffected certifications as the KBJ4005G. Moisture sensitivity level remains constant at MSL 1 (Unlimited) across all variants, and operating temperature range is uniform at -65°C to 150°C.

Selection of substitute parts depends on application voltage requirements. For circuits operating below 50 V, the KBJ4005G remains the optimal choice. For circuits requiring higher voltage withstand capability, parts within the 4 A current group (KBJ401G through KBJ410G) provide direct substitution with voltage ratings from 100 V to 1 kV while maintaining identical current capacity.

The 6 A current group (KBJ601G, KBJ604G, KBJ606G, KBJ608G) is suitable only when circuit design permits increased current handling. These parts feature higher forward voltage test current (3 A versus 2 A) and are not interchangeable with the KBJ4005G in current-limited applications.

Frequently Asked Questions (FAQ)

Q: Can KBJ401G replace KBJ4005G in my circuit?

A: Yes, if your circuit operates at or below 100 V. The KBJ401G maintains identical 4 A current rating and forward voltage characteristics. The higher voltage rating (100 V versus 50 V) provides additional safety margin in applications with voltage transients or design headroom.

Q: What is the difference between 4 A and 6 A rated parts?

A: Current rating indicates maximum average rectified current the part can handle. The 4 A group (KBJ4005G, KBJ401G, KBJ402G, etc.) is rated for 4 A continuous operation. The 6 A group (KBJ601G, KBJ604G, KBJ606G, KBJ608G) handles 6 A continuous operation. These are not interchangeable unless circuit design is modified to accommodate the higher current capacity.

Q: Are all substitute parts in the same package?

A: Yes. All listed parts use 4-SIP KBJ through-hole package configuration, ensuring identical board-level mechanical compatibility and pin spacing.

Q: What does peak reverse voltage rating mean?

A: Peak reverse voltage (Vr) is the maximum reverse voltage the rectifier can withstand without damage. The KBJ4005G is rated for 50 V peak reverse. Substitute parts with higher ratings (100 V, 200 V, 400 V, 600 V, 800 V, 1 kV) can operate safely in circuits with higher voltage sources.

Q: Can I use a higher voltage rated part in a lower voltage circuit?

A: Yes. A part rated for higher voltage can operate safely at lower voltages. For example, KBJ406G (600 V rating) functions correctly in a 50 V circuit. However, this may represent unnecessary cost and component size if the application does not require the higher voltage capability.

Q: Are compliance certifications identical across all parts?

A: Yes. All substitute parts listed carry ROHS3 compliance, REACH unaffected status, and MSL 1 (Unlimited) moisture sensitivity level, matching the KBJ4005G certifications.

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