DL5241B-TP Zener Diode 11V 500mW Equivalent & Substitute Parts

Part Overview

The DL5241B-TP is a Zener diode manufactured by Micro Commercial Co, rated at 11V nominal voltage with 500mW power dissipation in a Mini MELF surface mount package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design support and procurement. The part maintains ROHS3 compliance and unlimited moisture sensitivity rating, making it suitable for industrial and commercial applications requiring stable voltage regulation in compact form factors.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	11	V
Tolerance	±5%	-
Power - Max	500	mW
Impedance (Max)	22	Ohms
Current - Reverse Leakage @ Vr	2	µA @ 8.4V
Voltage - Forward (Vf) (Max) @ If	1.1	V @ 200mA
Operating Temperature Range	-65 to 175	°C
Mounting Type	Surface Mount	-
Package / Case	DO-213AC, MINI-MELF, SOD-80	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the DL5241B-TP is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 11V nominal
Power rating: 500mW maximum
Tolerance: ±5%
Impedance: Maximum 22 Ohms
Reverse leakage current: 2µA @ 8.4V
Forward voltage: 1.1V @ 200mA
Operating temperature range: -65°C to 175°C
Surface mount configuration

Package Compatibility Considerations: Substitutes are grouped into two categories based on package type:

Mini MELF Package (DO-213AC, SOD-80): Direct mechanical and electrical equivalents maintaining identical footprint and thermal characteristics. Includes Vishay TLZ series parts.
Alternative Surface Mount Packages (SOD-123, DO-213AA): Electrical equivalents with different mechanical form factors, requiring PCB layout modification but maintaining electrical performance within specified parameters.

Substitution is valid only when all electrical parameters remain within the specified tolerances and the operating temperature range encompasses the application requirements.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance	Power (mW)	Zzt (Ohms)	Vf @ If (V)	Temp Range (°C)	Package	Status	RoHS
DL5241B-TP	Micro Commercial Co	11	±5%	500	22	1.1 @ 200mA	-65 to 175	Mini MELF	Obsolete	ROHS3
MMSZ5241B-TP	Micro Commercial Co	11	±5%	500	22	0.9 @ 10mA	-55 to 150	SOD-123	Active	ROHS3
1N5241BUR-1	Microchip Technology	11	±5%	500	22	1.1 @ 200mA	-65 to 175	DO-213AA	Active	Non-compliant
TLZ11-GS08	Vishay	11	-	500	10	1.5 @ 200mA	-65 to 175	Mini MELF	Active	ROHS3
TLZ11-GS18	Vishay	11	-	500	10	1.5 @ 200mA	-65 to 175	Mini MELF	Active	ROHS3
TLZ11A-GS08	Vishay	11	-	500	10	1.5 @ 200mA	-65 to 175	Mini MELF	Active	ROHS3
TLZ11A-GS18	Vishay	11	-	500	10	1.5 @ 200mA	-65 to 175	Mini MELF	Active	ROHS3
TLZ11B-GS08	Vishay	11	-	500	10	1.5 @ 200mA	-65 to 175	Mini MELF	Active	ROHS3
TLZ11B-GS18	Vishay	11	-	500	10	1.5 @ 200mA	-65 to 175	Mini MELF	Active	ROHS3
TLZ11C-GS08	Vishay	11	-	500	10	1.5 @ 200mA	-65 to 175	Mini MELF	Active	ROHS3
TLZ11C-GS18	Vishay	11	-	500	10	1.5 @ 200mA	-65 to 175	Mini MELF	Active	ROHS3

Engineering Selection Recommendations

Primary Recommendation - Mini MELF Package Substitutes:

The Vishay TLZ series (TLZ11-GS08, TLZ11-GS18, TLZ11A-GS08, TLZ11A-GS18, TLZ11B-GS08, TLZ11B-GS18, TLZ11C-GS08, TLZ11C-GS18) are preferred substitutes for the obsolete DL5241B-TP. These parts maintain identical Mini MELF packaging, matching PCB footprint and thermal performance. All Vishay TLZ variants are active products with ROHS3 compliance. The impedance specification of 10 Ohms (versus 22 Ohms for the original) represents improved performance characteristics. Operating temperature range extends from -65°C to 175°C, matching the original specification. Forward voltage specification of 1.5V @ 200mA is within acceptable engineering tolerance for zener diode applications.

Secondary Recommendation - Alternative Package Substitutes:

The MMSZ5241B-TP (Micro Commercial Co, SOD-123 package) provides electrical equivalence with active product status and ROHS3 compliance. This substitute requires PCB layout modification due to different package geometry. Operating temperature range is reduced to -55°C to 150°C, limiting applicability in extended temperature environments. The forward voltage specification of 0.9V @ 10mA differs from the original measurement conditions.

The 1N5241BUR-1 (Microchip Technology, DO-213AA package) maintains identical electrical specifications including forward voltage (1.1V @ 200mA) and operating temperature range (-65°C to 175°C). However, this part is RoHS non-compliant, restricting use in regulated markets and applications with RoHS requirements.

Compliance Considerations:

For applications requiring ROHS3 compliance and extended temperature operation (-65°C to 175°C), select from the Vishay TLZ series with Mini MELF packaging. For applications with reduced temperature requirements (-55°C to 150°C) and RoHS3 compliance, the MMSZ5241B-TP is acceptable with PCB redesign. The 1N5241BUR-1 is suitable only for non-regulated applications without RoHS requirements.

Frequently Asked Questions (FAQ)

Q: Can I directly replace DL5241B-TP with any Vishay TLZ11 variant without PCB modification?

A: Yes. All Vishay TLZ11 series parts (TLZ11-GS08, TLZ11-GS18, TLZ11A-GS08, TLZ11A-GS18, TLZ11B-GS08, TLZ11B-GS18, TLZ11C-GS08, TLZ11C-GS18) use identical Mini MELF packaging (DO-213AC, SOD-80). Direct footprint compatibility is maintained without PCB layout changes.

Q: What is the difference between TLZ11, TLZ11A, TLZ11B, and TLZ11C variants?

A: All variants maintain 11V nominal zener voltage and 500mW power rating. Differences exist in reverse leakage current specifications: TLZ11 (unspecified), TLZ11A (40nA @ 9.67V), TLZ11B (40nA @ 9.98V), and TLZ11C (40nA @ 10.28V). Selection depends on leakage current requirements for the specific application.

Q: What does the GS08 and GS18 designation mean in Vishay part numbers?

A: GS08 and GS18 designations indicate different tape and reel packaging configurations for automated assembly. Both variants are electrically identical. Selection is based on procurement and assembly equipment compatibility.

Q: Can I use MMSZ5241B-TP as a direct replacement?

A: MMSZ5241B-TP is electrically equivalent but uses SOD-123 packaging instead of Mini MELF. PCB layout modification is required. Additionally, the operating temperature range is reduced to -55°C to 150°C, which may not be suitable for applications requiring the full -65°C to 175°C range of the original part.

Q: Is the 1N5241BUR-1 from Microchip a suitable substitute?

A: The 1N5241BUR-1 maintains identical electrical specifications and operating temperature range. However, it is RoHS non-compliant, restricting use in regulated markets and applications with mandatory RoHS requirements. Use is limited to non-regulated applications.

Q: How do impedance differences affect circuit performance?

A: The original DL5241B-TP specifies 22 Ohms maximum impedance, while Vishay TLZ series specifies 10 Ohms. Lower impedance represents improved voltage regulation characteristics and reduced dynamic resistance. This is a performance enhancement suitable for all applications designed for the original part.

Q: What are the implications of different forward voltage specifications?

A: Forward voltage specifications are measured at different current levels. The original part specifies 1.1V @ 200mA, while Vishay TLZ specifies 1.5V @ 200mA. These differences are within normal zener diode manufacturing tolerances and do not affect circuit functionality in typical voltage regulation applications.

Q: Are all substitute parts available in the same tape and reel configurations?

A: Vishay TLZ series parts are available in both GS08 and GS18 tape and reel configurations. MMSZ5241B-TP is available in Tape & Reel packaging. Availability of specific configurations should be verified with component suppliers based on procurement volume and assembly requirements.

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