DL5239B-TP Zener Diode 9.1V 500mW Equivalent & Substitute Parts

Part Overview

The DL5239B-TP is a surface mount zener diode manufactured by Micro Commercial Co, rated at 9.1 V nominal zener voltage with 500 mW maximum power dissipation in a Mini MELF package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and production continuity. Substitute parts must maintain electrical performance within the specified zener voltage, power rating, and thermal operating range while accommodating alternative package configurations where applicable.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	9.1	V
Tolerance	±5%	-
Power - Max	500	mW
Impedance (Max)	10	Ohms
Current - Reverse Leakage @ Vr	3	µA @ 7 V
Voltage - Forward (Vf) (Max) @ 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 DL5239B-TP is determined by the following critical parameters:

Electrical Equivalence Criteria:

Zener voltage: 9.1 V nominal
Power rating: 500 mW maximum
Impedance: Maximum 10 Ohms (Vishay TLZ series specifies 8 to 8.5 Ohms, which is within acceptable tolerance)
Reverse leakage current: 3 µA @ 7 V (Vishay TLZ series specifies 40 nA, which represents improved performance)

Thermal Compatibility:

Operating temperature range: -65°C to 175°C minimum (CLL5239B extends to 200°C, providing enhanced thermal margin)

Mechanical Compatibility:

Package type: Surface mount configurations (Mini MELF/SOD-80 compatible)
Mounting: All substitutes are surface mount

Compliance Requirements:

RoHS3 compliance required
MSL Level 1 (Unlimited moisture sensitivity)

Substitute parts are grouped into two categories: direct package equivalents (Mini MELF/SOD-80) and alternative package options (SOD-123). All listed substitutes maintain the 9.1 V zener voltage and 500 mW power rating specifications.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power Max	Zzt (Max)	Vf (Max) @ If	Temp Range	Package	Status
DL5239B-TP	Micro Commercial Co	9.1 V	±5%	500 mW	10 Ω	1.1 V @ 200 mA	-65 to 175°C	Mini MELF	Obsolete
MMSZ5239B-TP	Micro Commercial Co	9.1 V	±5%	500 mW	10 Ω	900 mV @ 10 mA	-55 to 150°C	SOD-123	Active
CLL5239B BK PBFREE	Central Semiconductor Corp	9.1 V	±5%	500 mW	10 Ω	1.25 V @ 200 mA	-65 to 200°C	SOD-80	Active
CLL5239B TR PBFREE	Central Semiconductor Corp	9.1 V	±5%	500 mW	10 Ω	1.25 V @ 200 mA	-65 to 200°C	SOD-80	Active
TLZ9V1-GS08	Vishay General Semiconductor	9.1 V	-	500 mW	8.5 Ω	1.5 V @ 200 mA	-65 to 175°C	SOD-80	Active
TLZ9V1-GS18	Vishay General Semiconductor	9.1 V	-	500 mW	8.5 Ω	1.5 V @ 200 mA	-65 to 175°C	SOD-80	Active
TLZ9V1A-GS08	Vishay General Semiconductor	9.1 V	-	500 mW	8 Ω	1.5 V @ 200 mA	-65 to 175°C	SOD-80	Active
TLZ9V1A-GS18	Vishay General Semiconductor	9.1 V	-	500 mW	8 Ω	1.5 V @ 200 mA	-65 to 175°C	SOD-80	Active
TLZ9V1B-GS08	Vishay General Semiconductor	9.1 V	-	500 mW	8 Ω	1.5 V @ 200 mA	-65 to 175°C	SOD-80	Active
TLZ9V1B-GS18	Vishay General Semiconductor	9.1 V	-	500 mW	8 Ω	1.5 V @ 200 mA	-65 to 175°C	SOD-80	Active
TLZ9V1C-GS08	Vishay General Semiconductor	9.1 V	-	500 mW	8 Ω	1.5 V @ 200 mA	-65 to 175°C	SOD-80	Active

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement):

The CLL5239B TR PBFREE and CLL5239B BK PBFREE from Central Semiconductor Corp are functionally equivalent to the DL5239B-TP. Both maintain the 9.1 V zener voltage, 500 mW power rating, and SOD-80 package configuration. The CLL5239B TR PBFREE is available in Tape & Reel packaging with 14,995 units in stock, providing the highest inventory availability. The extended operating temperature range (-65°C to 200°C) offers improved thermal margin compared to the original specification.

Secondary Substitutes (Package-Compatible Alternatives):

The Vishay TLZ series (TLZ9V1-GS08, TLZ9V1-GS18, TLZ9V1A-GS08, TLZ9V1A-GS18, TLZ9V1B-GS08, TLZ9V1B-GS18, TLZ9V1C-GS08) provides electrical equivalence with reduced impedance (8 to 8.5 Ohms versus 10 Ohms) and improved reverse leakage characteristics (40 nanoamperes versus 3 microamperes). All TLZ variants are rated for -65°C to 175°C operation and are packaged in SOD-80 Mini MELF configuration. The TLZ9V1B-GS08 offers the highest inventory level at 17,800 units.

Alternative Package Option:

The MMSZ5239B-TP from Micro Commercial Co provides electrical equivalence in SOD-123 package format. This option is suitable for applications where package footprint constraints permit SOD-123 geometry. The reduced operating temperature range (-55°C to 150°C) and lower forward voltage specification (900 mV @ 10 mA) require circuit-level evaluation for compatibility.

Compliance Status:

All substitute parts maintain RoHS3 compliance, MSL Level 1 rating, and REACH unaffected status, matching the original component specifications.

Frequently Asked Questions (FAQ)

Q: Can the MMSZ5239B-TP SOD-123 package be used as a direct replacement for the DL5239B-TP Mini MELF package?

A: The MMSZ5239B-TP is electrically equivalent but uses a different package footprint (SOD-123 versus Mini MELF). Direct PCB substitution is not possible without layout modification. The reduced operating temperature range (-55°C to 150°C) may also limit suitability for applications requiring the full -65°C to 175°C range.

Q: What is the difference between CLL5239B BK PBFREE and CLL5239B TR PBFREE?

A: Both parts are electrically and mechanically identical. The designation indicates packaging format: BK denotes Bulk packaging, while TR denotes Tape & Reel packaging. Selection depends on assembly process requirements and inventory management preferences.

Q: Are the Vishay TLZ9V1 variants interchangeable with each other?

A: The TLZ9V1, TLZ9V1A, TLZ9V1B, and TLZ9V1C variants maintain identical zener voltage (9.1 V), power rating (500 mW), and operating temperature range (-65°C to 175°C). Differences exist in impedance specifications and reverse leakage current characteristics at different measurement voltages. Selection among variants depends on circuit-specific impedance and leakage requirements.

Q: Does the extended temperature range of CLL5239B (-65°C to 200°C) provide any advantage over the original DL5239B-TP specification?

A: The extended upper temperature limit (200°C versus 175°C) provides additional thermal margin for applications operating near maximum ambient temperature or with elevated component self-heating. This specification enhancement does not introduce compatibility issues with circuits designed for the original -65°C to 175°C range.

Q: What is the significance of the impedance difference between DL5239B-TP (10 Ohms max) and TLZ9V1 series (8 to 8.5 Ohms)?

A: Lower impedance values indicate improved dynamic response characteristics and reduced voltage variation under load transients. The TLZ series impedance specifications represent enhanced performance within the 9.1 V zener voltage class. Circuits designed for 10 Ohm impedance tolerance will operate within specification with the lower impedance TLZ variants.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain RoHS3 compliance status, matching the original DL5239B-TP specification. This compliance status applies to all Central Semiconductor Corp CLL5239B variants and Vishay TLZ9V1 series parts.

Q: What inventory considerations should guide substitute part selection?

A: The CLL5239B TR PBFREE offers the highest inventory availability at 14,995 units, followed by TLZ9V1B-GS08 at 17,800 units. For applications requiring immediate availability, these options provide the shortest lead times. The original DL5239B-TP, despite obsolete status, maintains 794 units in stock.

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