DHG40C600PB Equivalent & Substitute Parts

Part Overview

The DHG40C600PB is a diode array manufactured by IXYS, configured as a 1 Pair Common Cathode rectifier with 600 V reverse voltage rating and 20 A average rectified current per diode. The component is packaged in TO-220-3 through-hole format and is classified as obsolete. Due to its obsolete product status, equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production and repair applications.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	600 V
Current - Average Rectified (Io) (per Diode)	20 A
Voltage - Forward (Vf) (Max) @ If	2.32 V @ 20 A
Reverse Recovery Time (trr)	35 ns
Current - Reverse Leakage @ Vr	30 µA @ 600 V
Diode Configuration	1 Pair Common Cathode
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Operating Temperature - Junction	-55°C ~ 150°C
Package / Case	TO-220-3
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the DHG40C600PB is determined by the following critical parameters:

Mandatory Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 600 V
Diode Configuration: 1 Pair Common Cathode
Package / Case: TO-220-3
Mounting Type: Through Hole

Current Rating Consideration: The DHG40C600PB operates at 20 A average rectified current per diode. Substitute parts must support this current level or higher to maintain functional equivalence. Parts with lower current ratings (5 A, 8 A, 10 A) operate within reduced current envelopes and are classified as downgrades rather than direct equivalents.

Speed and Recovery Characteristics: All substitute candidates maintain Fast Recovery technology with reverse recovery time specifications within acceptable ranges for standard rectifier applications.

Compliance and Environmental: All substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), ensuring regulatory and environmental compatibility.

Parameter Comparison

Parameter	DHG40C600PB (Main)	SF808GHC0G	STTH10LCD06CT	STTH16L06CTY
Manufacturer	IXYS	Taiwan Semiconductor Corporation	STMicroelectronics	STMicroelectronics
Product Status	Obsolete	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	600 V	600 V	600 V	600 V
Current - Average Rectified (Io) (per Diode)	20 A	8 A	5 A	10 A
Voltage - Forward (Vf) (Max) @ If	2.32 V @ 20 A	1.7 V @ 8 A	2 V @ 5 A	1.8 V @ 8 A
Reverse Recovery Time (trr)	35 ns	35 ns	50 ns	55 ns
Current - Reverse Leakage @ Vr	30 µA @ 600 V	10 µA @ 600 V	1 µA @ 600 V	8 µA @ 600 V
Diode Configuration	1 Pair Common Cathode	Single Diode	1 Pair Common Cathode	1 Pair Common Cathode
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 175°C	-40°C ~ 175°C
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Grade	Standard	Automotive	Standard	Automotive
Qualification	None Listed	AEC-Q101	None Listed	AEC-Q101

Engineering Selection Recommendations

STTH16L06CTY (STMicroelectronics) is the primary substitute candidate for the DHG40C600PB. This part maintains the required 1 Pair Common Cathode configuration, 600 V reverse voltage rating, and TO-220-3 package. The STTH16L06CTY operates at 10 A average rectified current per diode, which represents a 50% reduction from the DHG40C600PB specification. The part carries active product status, ROHS3 compliance, AEC-Q101 automotive qualification, and extended operating temperature range (-40°C ~ 175°C). The reverse recovery time of 55 ns is within acceptable tolerance for standard rectifier applications.

STTH10LCD06CT (STMicroelectronics) provides an alternative substitute with identical diode configuration and package specifications. This part operates at 5 A average rectified current per diode and carries active product status with ROHS3 compliance. The extended maximum junction temperature of 175°C and superior reverse leakage characteristics (1 µA @ 600 V) offer performance advantages in specific thermal environments. The reverse recovery time of 50 ns remains within acceptable parameters.

SF808GHC0G (Taiwan Semiconductor Corporation) is not a direct substitute due to its single diode configuration, which differs from the required 1 Pair Common Cathode topology. This part is listed for reference only and requires circuit redesign for implementation.

Selection between STTH16L06CTY and STTH10LCD06CT depends on application current requirements. Applications requiring 10 A or higher per diode should utilize STTH16L06CTY. Applications with current requirements of 5 A or lower should utilize STTH10LCD06CT.

Frequently Asked Questions (FAQ)

Q: Can the DHG40C600PB be directly replaced with STTH16L06CTY?

A: STTH16L06CTY is a functional substitute with matching voltage rating, diode configuration, and package. The primary difference is current rating: STTH16L06CTY operates at 10 A per diode versus 20 A for the DHG40C600PB. Direct replacement is possible in applications where circuit current requirements do not exceed 10 A per diode.

Q: What is the significance of the 1 Pair Common Cathode configuration?

A: The 1 Pair Common Cathode configuration specifies the internal diode arrangement within the TO-220-3 package. This configuration is essential for specific circuit topologies and cannot be substituted with single diode packages or alternative configurations without circuit redesign.

Q: Why does SF808GHC0G not qualify as a substitute?

A: SF808GHC0G is a single diode package, not a diode array with 1 Pair Common Cathode configuration. The DHG40C600PB requires the common cathode pair topology for functional equivalence. SF808GHC0G would require complete circuit redesign and is not a direct substitute.

Q: Are STTH16L06CTY and STTH10LCD06CT interchangeable?

A: Both parts share identical voltage rating, diode configuration, and package specifications. They are not interchangeable due to different current ratings (10 A versus 5 A per diode). Selection depends on application current requirements.

Q: What is the impact of reverse recovery time differences?

A: The DHG40C600PB specifies 35 ns reverse recovery time. STTH16L06CTY specifies 55 ns and STTH10LCD06CT specifies 50 ns. These differences fall within acceptable ranges for standard rectifier applications and do not prevent substitution in typical power supply and rectification circuits.

Q: Do the substitute parts maintain RoHS compliance?

A: All substitute parts listed (STTH16L06CTY, STTH10LCD06CT) are ROHS3 compliant with unlimited moisture sensitivity level (MSL 1), matching the environmental compliance profile of the DHG40C600PB.

Q: What is the significance of AEC-Q101 qualification on STTH16L06CTY and SF808GHC0G?

A: AEC-Q101 qualification indicates automotive-grade reliability testing and qualification. This certification is relevant for applications requiring automotive-grade components. Standard industrial applications do not require this qualification.

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