DL4933-13-F Equivalent & Substitute Parts

Part Overview

The DL4933-13-F is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 50 V DC reverse voltage and 1 A average rectified current in a surface mount MELF (DO-213AB) package. This part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for new designs and production continuity.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.2	V @ 1 A
Reverse Recovery Time (trr)	200	ns
Current - Reverse Leakage @ Vr	5	µA @ 50 V
Package / Case	DO-213AB, MELF (Glass)	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the DL4933-13-F is determined by strict equivalence in the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 50 V
Current - Average Rectified (Io): 1 A
Package / Case: DO-213AB, MELF (Glass)
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Secondary Compatibility Factors:

Voltage - Forward (Vf) (Max) @ If: Must not exceed 1.2 V @ 1 A
Operating Temperature - Junction: Must support -65°C to 150°C minimum
Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed maintain the core electrical ratings and physical package specifications required for direct replacement. Variations in reverse recovery time, reverse leakage current, and capacitance are within acceptable ranges for general-purpose rectifier applications.

Parameter Comparison

Parameter	DL4933-13-F	BYM12-50-E3/96	1N6478-E3/96	BYM10-50-E3/96	BYM10-50-E3/97	GL41A-E3/96	GL41A-E3/97
Manufacturer	Diodes Inc.	Vishay	Vishay	Vishay	Vishay	Vishay	Vishay
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	50 V	50 V	50 V	50 V	50 V	50 V	50 V
Current - Average Rectified (Io)	1 A	1 A	1 A	1 A	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 1 A	1.0 V @ 1 A	1.1 V @ 1 A	1.1 V @ 1 A	1.1 V @ 1 A	1.1 V @ 1 A	1.1 V @ 1 A
Reverse Recovery Time (trr)	200 ns	50 ns	Not specified	Not specified	Not specified	Not specified	Not specified
Current - Reverse Leakage @ Vr	5 µA @ 50 V	5 µA @ 50 V	10 µA @ 50 V	10 µA @ 50 V	10 µA @ 50 V	10 µA @ 50 V	10 µA @ 50 V
Capacitance @ Vr, F	15 pF @ 4V, 1MHz	20 pF @ 4V, 1MHz	8 pF @ 4V, 1MHz	8 pF @ 4V, 1MHz	8 pF @ 4V, 1MHz	8 pF @ 4V, 1MHz	8 pF @ 4V, 1MHz
Package / Case	DO-213AB, MELF	DO-213AB, MELF	DO-213AB, MELF	DO-213AB, MELF	DO-213AB, MELF	DO-213AB, MELF	DO-213AB, MELF
Operating Temperature - Junction	-65 to 150 °C	-65 to 175 °C	-65 to 175 °C	-65 to 175 °C	-65 to 175 °C	-65 to 175 °C	-65 to 175 °C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Affected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All listed substitute parts are active products with ROHS3 compliance and unlimited moisture sensitivity rating, making them suitable for direct replacement of the obsolete DL4933-13-F in new designs and production applications.

BYM12-50-E3/96 offers the lowest forward voltage drop (1.0 V @ 1 A) and fastest reverse recovery time (50 ns), providing superior switching performance characteristics. This part is available in Cut Tape & Digi-Reel packaging.

1N6478-E3/96, BYM10-50-E3/96, BYM10-50-E3/97, GL41A-E3/96, and GL41A-E3/97 maintain forward voltage specifications of 1.1 V @ 1 A with extended operating temperature ranges to 175°C. These alternatives are available in Tape & Reel or Cut Tape packaging formats.

All substitute parts maintain the 50 V reverse voltage rating, 1 A current rating, and DO-213AB MELF package specification. The REACH Unaffected status of all Vishay alternatives provides regulatory advantage over the REACH Affected status of the original part.

Frequently Asked Questions (FAQ)

Q: Can BYM12-50-E3/96 be used as a direct replacement for DL4933-13-F?

A: Yes. BYM12-50-E3/96 meets all primary substitution criteria: 50 V reverse voltage rating, 1 A average rectified current, DO-213AB MELF package, surface mount configuration, and ROHS3 compliance. The lower forward voltage (1.0 V vs. 1.2 V) and faster recovery time (50 ns vs. 200 ns) represent performance improvements.

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

A: Tape & Reel packaging is supplied on continuous reel format for automated assembly processes. Cut Tape & Digi-Reel packaging is supplied in tape segments for manual or semi-automated handling. Both formats contain identical diode components; packaging selection depends on assembly equipment and production volume requirements.

Q: Are there temperature rating differences between substitute parts?

A: The DL4933-13-F operates to 150°C junction temperature. All substitute parts extend this to 175°C, providing additional thermal margin. This enhancement does not affect compatibility; circuits designed for the original part will operate within the substitute part's temperature range.

Q: How do reverse recovery time variations affect circuit performance?

A: The DL4933-13-F specifies 200 ns reverse recovery time. BYM12-50-E3/96 provides 50 ns, while other substitutes do not specify this parameter. Faster recovery time reduces switching losses and improves efficiency in high-frequency applications. Slower recovery times remain compatible with general-purpose rectification circuits.

Q: What is the significance of REACH Unaffected status?

A: All substitute parts carry REACH Unaffected status, indicating compliance with European chemical regulations without substance restrictions. The original DL4933-13-F is REACH Affected, requiring additional regulatory documentation. Substitution with REACH Unaffected parts simplifies compliance for European market applications.

Q: Can these diodes be used interchangeably in the same circuit board layout?

A: Yes. All substitute parts use identical DO-213AB MELF package dimensions and surface mount footprints, enabling direct PCB layout compatibility without design modification.

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