Equivalent & Substitute Parts for DL5246B-TP

Part Overview

The DL5246B-TP is a Zener diode rated at 16 V nominal voltage with 500 mW maximum power dissipation, manufactured by Micro Commercial Co in a Mini MELF surface mount package. This component is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications. Substitute parts must satisfy identical electrical specifications while accommodating different package configurations where applicable.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	16	V
Tolerance	±5	%
Power - Max	500	mW
Impedance (Max)	17	Ohms
Current - Reverse Leakage @ Vr	100 nA @ 12 V	nA
Voltage - Forward (Vf) (Max)	1.1 V @ 200 mA	V
Operating Temperature Range	-65°C to 175°C	°C
Mounting Type	Surface Mount	—
Package / Case	DO-213AC, MINI-MELF, SOD-80	—

Substitute Part Grouping Explanation

Substitution eligibility for the DL5246B-TP is determined by strict equivalence across the following electrical parameters: nominal Zener voltage (16 V), voltage tolerance (±5%), maximum power rating (500 mW), maximum impedance (17 Ohms), reverse leakage current (100 nA @ 12 V), and forward voltage characteristics. All identified substitute parts maintain these core electrical specifications. Package configuration differences (Mini MELF, SOD-123, SOD-80) are accommodated through mechanical redesign at the circuit board level and do not affect electrical performance. Operating temperature range variations are noted but do not preclude substitution where the application temperature envelope falls within the substitute part's rated limits.

Parameter Comparison

Parameter	DL5246B-TP	MMSZ5246B-TP	1N5246BUR-1	CZRL5246B
Manufacturer	Micro Commercial Co	Micro Commercial Co	Microchip Technology	Comchip Technology
Voltage - Zener (Nom)	16 V	16 V	16 V	16 V
Tolerance	±5%	±5%	±5%	±5%
Power - Max	500 mW	500 mW	500 mW	500 mW
Impedance (Max)	17 Ohms	17 Ohms	17 Ohms	17 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 12 V	100 nA @ 12 V	100 nA @ 12 V	100 nA @ 12 V
Voltage - Forward (Vf) (Max)	1.1 V @ 200 mA	900 mV @ 10 mA	1.1 V @ 200 mA	1.25 V @ 200 mA
Operating Temperature Range	-65°C to 175°C	-55°C to 150°C	-65°C to 175°C	Not specified
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	DO-213AC, MINI-MELF, SOD-80	SOD-123	DO-213AA	DO-213AC, MINI-MELF, SOD-80
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

MMSZ5246B-TP is suitable for applications where the operating temperature range of -55°C to 150°C satisfies circuit requirements and where SOD-123 package footprint can be accommodated through board redesign. This part maintains active product status and ROHS3 compliance. Forward voltage specification differs from the main part but remains within acceptable operating parameters for Zener diode applications.

1N5246BUR-1 provides electrical equivalence with identical operating temperature range (-65°C to 175°C) and forward voltage characteristics (1.1 V @ 200 mA) matching the DL5246B-TP. However, this part carries RoHS non-compliant status, restricting its use in applications subject to RoHS3 regulatory requirements. The DO-213AA package is mechanically compatible with Mini MELF footprints in many circuit designs.

CZRL5246B maintains identical package configuration (SOD-80 MiniMELF) to the original DL5246B-TP, eliminating the need for board-level redesign. This part is active and ROHS3 compliant. Operating temperature range is not specified in available documentation. Forward voltage specification (1.25 V @ 200 mA) represents a minor deviation from the main part specification.

Frequently Asked Questions (FAQ)

Q: Can MMSZ5246B-TP replace DL5246B-TP in all applications?

A: MMSZ5246B-TP maintains electrical equivalence across all critical Zener parameters. Substitution is valid for applications operating within the -55°C to 150°C temperature range. The SOD-123 package requires circuit board redesign compared to the Mini MELF footprint of the original part.

Q: What is the primary difference between 1N5246BUR-1 and DL5246B-TP?

A: Both parts share identical electrical specifications and operating temperature range. The primary distinction is RoHS compliance status: DL5246B-TP is ROHS3 compliant while 1N5246BUR-1 is RoHS non-compliant. This affects suitability for regulated applications and end-market requirements.

Q: Why is CZRL5246B preferred for direct replacement?

A: CZRL5246B uses the SOD-80 MiniMELF package, matching the original DL5246B-TP package configuration. This eliminates mechanical redesign requirements at the circuit board level. The part is active and ROHS3 compliant, supporting long-term supply chain continuity.

Q: Are forward voltage differences between substitute parts significant?

A: Forward voltage specifications vary slightly across substitute parts (900 mV to 1.25 V at different test currents). These variations fall within normal Zener diode operating tolerances and do not affect substitution validity for standard circuit applications. Circuit designers should verify forward voltage performance within their specific application context.

Q: What packaging considerations apply when selecting a substitute?

A: DL5246B-TP uses Mini MELF (SOD-80) surface mount package. MMSZ5246B-TP uses SOD-123 package, requiring footprint modification. 1N5246BUR-1 uses DO-213AA package, which is mechanically compatible with Mini MELF in many designs. CZRL5246B maintains the original SOD-80 MiniMELF package, requiring no board redesign.

Q: Can these parts be used interchangeably in high-temperature applications?

A: DL5246B-TP and 1N5246BUR-1 both support -65°C to 175°C operating range, suitable for high-temperature applications. MMSZ5246B-TP is limited to -55°C to 150°C. CZRL5246B operating temperature range is not specified. Application temperature requirements must be verified against each substitute part's rated limits.

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