DL5247B-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The DL5247B-TP is a 17 V, 500 mW surface mount zener diode manufactured by Micro Commercial Co in Mini MELF (DO-213AC) 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 voltage regulation and transient protection.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	17	V
Power - Maximum	500	mW
Tolerance	±5	%
Impedance (Maximum)	19	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 13 V
Voltage - Forward (Maximum) @ If	1.1	V @ 200 mA
Operating Temperature Range	-65 to 175	°C
Mounting Type	Surface Mount
Package / Case	DO-213AC, MINI-MELF, SOD-80
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the DL5247B-TP is determined by the following critical parameters:

Electrical Parameters:

Zener voltage: 17 V nominal
Power dissipation: 500 mW maximum
Tolerance: ±5%
Impedance: 19 Ohms maximum
Reverse leakage current: 100 nA @ 13 V
Forward voltage: 1.1 V @ 200 mA

Mechanical Parameters:

Surface mount configuration
Package compatibility: DO-213AC, MINI-MELF, SOD-80

Environmental & Compliance:

Operating temperature range: -65°C to 175°C
RoHS3 compliance
MSL rating: 1 (Unlimited)

Substitute parts are classified into two categories:

Direct Equivalents (Upgrade): Parts with identical electrical specifications and active product status. These include CLL5247B BK PBFREE and CLL5247B TR PBFREE from Central Semiconductor Corp, which maintain all electrical parameters while offering extended operating temperature range (-65°C to 200°C) and active availability.

Parametric Equivalents: Parts meeting all critical electrical specifications with active status. TZM5247B-GS08 and TZM5247B-GS18 from Vishay General Semiconductor maintain identical zener voltage, power rating, tolerance, impedance, and reverse leakage specifications.

Similar Substitutes: MMSZ5247B-TP from Micro Commercial Co meets electrical specifications but operates within a reduced temperature range (-55°C to 150°C) and uses SOD-123 package, requiring PCB layout modification.

Parameter Comparison

Parameter	DL5247B-TP (Main)	CLL5247B BK PBFREE	CLL5247B TR PBFREE	TZM5247B-GS08	TZM5247B-GS18	MMSZ5247B-TP
Manufacturer	Micro Commercial Co	Central Semiconductor Corp	Central Semiconductor Corp	Vishay General Semiconductor	Vishay General Semiconductor	Micro Commercial Co
Voltage - Zener (Nom)	17 V	17 V	17 V	17 V	17 V	17 V
Power - Max	500 mW	500 mW	500 mW	500 mW	500 mW	500 mW
Tolerance	±5%	±5%	±5%	±5%	±5%	±5%
Impedance (Max)	19 Ohms	19 Ohms	19 Ohms	19 Ohms	19 Ohms	Not specified
Current - Reverse Leakage @ Vr	100 nA @ 13 V	100 nA @ 13 V	100 nA @ 13 V	100 nA @ 13 V	100 nA @ 13 V	Not specified
Voltage - Forward (Max) @ If	1.1 V @ 200 mA	1.25 V @ 200 mA	1.25 V @ 200 mA	1.1 V @ 200 mA	1.1 V @ 200 mA	Not specified
Operating Temperature	-65°C to 175°C	-65°C to 200°C	-65°C to 200°C	-65°C to 175°C	-65°C to 175°C	-55°C to 150°C
Package / Case	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	SOD-123
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (Direct Equivalents):

CLL5247B BK PBFREE and CLL5247B TR PBFREE from Central Semiconductor Corp are the preferred direct equivalents. Both parts maintain identical electrical specifications (17 V zener voltage, 500 mW power rating, ±5% tolerance, 19 Ohms impedance, 100 nA reverse leakage) and package compatibility (DO-213AC, MINI-MELF, SOD-80). These parts offer extended operating temperature range to 200°C compared to the original 175°C maximum. Both are ROHS3 compliant with unlimited MSL rating. CLL5247B TR PBFREE in tape and reel packaging offers significantly higher inventory availability (14,597 pcs) for production requirements.

Secondary Substitutes (Parametric Equivalents):

TZM5247B-GS08 and TZM5247B-GS18 from Vishay General Semiconductor meet all critical electrical parameters and maintain the same operating temperature range (-65°C to 175°C) as the original part. Both are active products with ROHS3 compliance and unlimited MSL rating. TZM5247B-GS08 provides higher inventory availability (30,100 pcs). These parts are suitable for applications where manufacturer diversity is required or when Central Semiconductor supply is constrained.

Alternative Substitute (Package Modification Required):

MMSZ5247B-TP from Micro Commercial Co maintains electrical specifications but uses SOD-123 package instead of Mini MELF. This substitution requires PCB layout modification and is suitable only when package change is acceptable. Operating temperature range is reduced to -55°C to 150°C, limiting use in extended temperature applications. This option is appropriate for new designs or when existing inventory of SOD-123 footprints is available.

Frequently Asked Questions (FAQ)

Q: Can CLL5247B BK PBFREE directly replace DL5247B-TP without PCB modification?

A: Yes. CLL5247B BK PBFREE maintains identical package specification (DO-213AC, MINI-MELF, SOD-80) and all critical electrical parameters. No PCB layout changes are required. The part is pin-compatible and functionally equivalent.

Q: What is the difference between CLL5247B BK PBFREE and CLL5247B TR PBFREE?

A: Both parts are electrically and mechanically identical. The difference is packaging format: BK PBFREE is supplied in bulk, while TR PBFREE is supplied in tape and reel format. Selection depends on assembly process requirements and inventory management. TR PBFREE offers higher available inventory (14,597 pcs vs. 777 pcs).

Q: Are TZM5247B-GS08 and TZM5247B-GS18 interchangeable?

A: Yes. Both Vishay parts are electrically and mechanically identical. The designation difference (GS08 vs. GS18) reflects internal Vishay manufacturing codes and does not affect performance or compatibility. Selection can be based on inventory availability.

Q: Why does MMSZ5247B-TP require PCB modification?

A: MMSZ5247B-TP uses SOD-123 package instead of Mini MELF (SOD-80). These packages have different physical dimensions and lead configurations, requiring PCB footprint redesign. This substitution is not recommended for existing designs without layout validation.

Q: What is the impact of the forward voltage difference between DL5247B-TP (1.1 V) and CLL5247B variants (1.25 V)?

A: The 0.15 V difference in forward voltage at 200 mA is within the ±5% tolerance specification and does not affect zener regulation performance. Both specifications meet the same functional requirements for voltage regulation and transient protection applications.

Q: Can I use MMSZ5247B-TP in applications requiring -65°C operation?

A: No. MMSZ5247B-TP operates only to -55°C minimum, which is 10°C above the original DL5247B-TP specification. Applications requiring full -65°C to 175°C range must use CLL5247B variants, TZM5247B-GS08, or TZM5247B-GS18.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (CLL5247B BK PBFREE, CLL5247B TR PBFREE, TZM5247B-GS08, TZM5247B-GS18, and MMSZ5247B-TP) are ROHS3 compliant with unlimited MSL rating, matching the original DL5247B-TP compliance status.

Q: Which substitute offers the best inventory availability?

A: TZM5247B-GS08 from Vishay provides the highest inventory availability at 30,100 pcs. CLL5247B TR PBFREE from Central Semiconductor offers 14,597 pcs. Both are suitable for high-volume production requirements.

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