DL5256B-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The DL5256B-TP is a 30 V, 500 mW Zener diode manufactured by Micro Commercial Co in a Surface Mount Mini MELF package (DO-213AC, SOD-80). This component is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity. Substitute parts must maintain identical electrical specifications and package compatibility to ensure direct replacement in existing circuit designs.

Key Parameters

Parameter	Value
Voltage - Zener (Nom) (Vz)	30 V
Tolerance	±5%
Power - Max	500 mW
Impedance (Max) (Zzt)	49 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 23 V
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 200 mA
Operating Temperature Range	-65°C ~ 175°C
Mounting Type	Surface Mount
Package / Case	DO-213AC, MINI-MELF, SOD-80
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the DL5256B-TP is determined by strict equivalence across the following critical parameters:

Electrical Specifications:

Zener voltage: 30 V nominal
Power dissipation: 500 mW maximum
Tolerance: ±5%
Impedance: 49 Ohms maximum
Reverse leakage current: 100 nA @ 23 V
Forward voltage: 1.1 V maximum @ 200 mA

Physical & Environmental Specifications:

Package type: DO-213AC / MINI-MELF / SOD-80 (Surface Mount)
Operating temperature range: -65°C to 175°C
Moisture sensitivity: MSL 1 (Unlimited)
Regulatory compliance: ROHS3 Compliant, REACH Unaffected

All substitute parts listed maintain 100% parametric equivalence across these specifications. Substitution is valid only when all electrical and mechanical parameters match exactly.

Parameter Comparison

Parameter	DL5256B-TP (Micro Commercial Co)	TZM5256B-GS08 (Vishay)	TZM5256B-GS18 (Vishay)
Voltage - Zener (Nom) (Vz)	30 V	30 V	30 V
Tolerance	±5%	±5%	±5%
Power - Max	500 mW	500 mW	500 mW
Impedance (Max) (Zzt)	49 Ohms	49 Ohms	49 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 23 V	100 nA @ 23 V	100 nA @ 23 V
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 200 mA	1.1 V @ 200 mA	1.1 V @ 200 mA
Operating Temperature Range	-65°C ~ 175°C	-65°C ~ 175°C	-65°C ~ 175°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active

Engineering Selection Recommendations

Primary Substitutes:

The TZM5256B-GS08 and TZM5256B-GS18 manufactured by Vishay General Semiconductor - Diodes Division are direct parametric equivalents to the obsolete DL5256B-TP. Both parts are currently in active production status, ensuring long-term availability and supply chain continuity.

Compliance & Regulatory Status:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the original component. Moisture sensitivity level remains MSL 1 (Unlimited) across all options, eliminating any handling or storage requirement changes.

Availability Considerations:

The TZM5256B-GS08 variant offers higher inventory availability (17,800 pieces in stock) compared to the TZM5256B-GS18 variant (684 pieces in stock). Selection between these two Vishay options should be based on packaging format requirements (Tape & Reel designation applies to both) and procurement lead time constraints.

Mechanical Compatibility:

Both Vishay substitutes utilize the SOD-80 MiniMELF package designation, which is mechanically and electrically compatible with the original DO-213AC / MINI-MELF package footprint. No PCB layout modifications are required for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can TZM5256B-GS08 and TZM5256B-GS18 be used interchangeably with DL5256B-TP?

A: Yes. Both Vishay parts are parametric equivalents with identical electrical specifications (30 V nominal zener voltage, 500 mW power rating, ±5% tolerance, 49 Ohms impedance, 100 nA reverse leakage, 1.1 V forward voltage) and compatible Surface Mount SOD-80 MiniMELF packaging. Direct substitution is valid without circuit modification.

Q: What is the difference between TZM5256B-GS08 and TZM5256B-GS18?

A: Both parts are electrically and mechanically identical. The designation suffix (-GS08 vs -GS18) reflects different packaging tape configurations or manufacturing date codes. Electrical performance and package footprint are equivalent. Selection should be based on procurement availability and packaging format preference.

Q: Why is the DL5256B-TP listed as obsolete?

A: Obsolete status indicates the part is no longer manufactured by Micro Commercial Co. The Vishay TZM5256B series provides active production alternatives with identical specifications, ensuring design continuity and future availability.

Q: Are there any thermal or environmental differences between the original and substitute parts?

A: No. All parts maintain identical operating temperature range (-65°C to 175°C), moisture sensitivity level (MSL 1 - Unlimited), and thermal characteristics. Thermal performance and environmental ratings are equivalent.

Q: Do the substitute parts require different PCB footprints?

A: No. The TZM5256B-GS08 and TZM5256B-GS18 use the SOD-80 MiniMELF package, which is mechanically compatible with the original DO-213AC MINI-MELF footprint. Existing PCB designs require no modification.

Q: Are regulatory certifications maintained with the substitute parts?

A: Yes. Both Vishay substitutes maintain ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the original DL5256B-TP component.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message