TZM5232B-GS18 Equivalent & Substitute Parts

Part Overview

The TZM5232B-GS18 is a Zener diode rated at 5.6 V, 500 mW, manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component in SOD-80 MiniMELF packaging is designed for voltage regulation and protection applications. The part is currently Active in product status with 131,100 units in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to component availability, supply chain considerations, or design flexibility within specified parameter tolerances.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	5.6	V
Tolerance	±5%	%
Power - Max	500	mW
Impedance (Max)	11	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 3 V
Voltage - Forward (Vf) (Max) @ If	1.1	V @ 200 mA
Operating Temperature	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 TZM5232B-GS18 is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nom): 5.6 V nominal with ±5% tolerance
Power - Max: 500 mW
Mounting Type: Surface Mount
Moisture Sensitivity Level: 1 (Unlimited)

Secondary Compatibility Factors:

Package / Case: DO-213AC (SOD-80 MiniMELF) or equivalent mechanical footprint
Operating Temperature: Maximum 175°C
RoHS Compliance: ROHS3 Compliant preferred for regulatory alignment

Substitute parts are grouped into two categories:

Category 1 - Direct Voltage Match (5.6 V): Parts maintaining the exact 5.6 V nominal zener voltage specification. These provide direct functional equivalence with minimal circuit redesign.

Category 2 - Voltage Tolerance Band (5.1 V): Parts within the ±5% tolerance band of the original specification. These operate within acceptable voltage regulation parameters for applications with tolerance flexibility.

Category 3 - Alternative Package Formats: Parts with equivalent electrical specifications but different mechanical packaging (DO-213AA, DO-213AB) suitable for designs with package flexibility.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power Max	Zzt (Max)	Vf (Max) @ If	Package	Operating Temp	RoHS Status	Product Status
TZM5232B-GS18	Vishay	5.6 V	±5%	500 mW	11 Ω	1.1 V @ 200 mA	SOD-80	175°C	ROHS3	Active
TZMC5V6-GS08	Vishay	5.6 V	±5%	500 mW	40 Ω	1.5 V @ 200 mA	SOD-80	175°C	ROHS3	Active
1N4626UR-1	Microchip	5.6 V	±5%	500 mW	1400 Ω	1.1 V @ 200 mA	DO-213AA	-65°C ~ 175°C	ROHS3	Active
1N5231BUR-1	Microchip	5.1 V	±5%	500 mW	17 Ω	1.1 V @ 200 mA	DO-213AA	-65°C ~ 175°C	Non-compliant	Active
1N5523BUR-1	Microchip	5.1 V	±5%	500 mW	26 Ω	1.1 V @ 200 mA	DO-213AA	-65°C ~ 175°C	Non-compliant	Active
CDLL4624	Microchip	4.7 V	±5%	500 mW	1550 Ω	1.1 V @ 200 mA	DO-213AA	-65°C ~ 175°C	Non-compliant	Active
CDLL4625	Microchip	5.1 V	±5%	500 mW	1500 Ω	1.1 V @ 200 mA	DO-213AA	-65°C ~ 175°C	Non-compliant	Active
CDLL751A	Microchip	5.1 V	±5%	500 mW	17 Ω	1.1 V @ 200 mA	DO-213AB	-65°C ~ 175°C	Non-compliant	Active

Engineering Selection Recommendations

Direct Equivalent - Same Manufacturer:

TZMC5V6-GS08 (Vishay) provides direct voltage equivalence at 5.6 V with identical power rating and SOD-80 packaging. This part maintains ROHS3 compliance and Automotive grade qualification (AEC-Q101). The primary difference is impedance specification (40 Ω vs. 11 Ω) and forward voltage (1.5 V vs. 1.1 V @ 200 mA). Selection is appropriate for applications where automotive qualification is required.

Direct Equivalent - Cross-Manufacturer:

1N4626UR-1 (Microchip) matches the 5.6 V nominal voltage and 500 mW power specification with identical forward voltage characteristics (1.1 V @ 200 mA). The part uses DO-213AA packaging instead of SOD-80 and provides extended operating temperature range (-65°C to 175°C). ROHS3 compliance is maintained. This part is suitable for designs with package flexibility and extended low-temperature operation requirements.

Voltage Tolerance Band Equivalents (5.1 V):

1N5231BUR-1, 1N5523BUR-1, CDLL4625, and CDLL751A all operate at 5.1 V nominal, which falls within the ±5% tolerance band of the 5.6 V specification (5.32 V to 5.88 V). These parts are suitable for applications where the voltage regulation window permits 5.1 V operation. All maintain 500 mW power rating and 1.1 V forward voltage. RoHS compliance status is non-compliant for these alternatives. CDLL751A uses DO-213AB packaging; others use DO-213AA.

Alternative Voltage - Not Recommended for Direct Substitution:

CDLL4624 operates at 4.7 V nominal, which falls outside the acceptable tolerance band for direct substitution of a 5.6 V specification. This part is listed in the substitute database but requires circuit validation before implementation.

Compliance Considerations:

The original TZM5232B-GS18 is ROHS3 compliant. TZMC5V6-GS08 and 1N4626UR-1 maintain this compliance. Alternative parts from Microchip (1N5231BUR-1, 1N5523BUR-1, CDLL4624, CDLL4625, CDLL751A) are RoHS non-compliant and require regulatory assessment before use in applications subject to RoHS requirements.

Frequently Asked Questions (FAQ)

Q: Can TZMC5V6-GS08 be used as a direct replacement for TZM5232B-GS18?

A: TZMC5V6-GS08 is electrically equivalent at 5.6 V nominal with identical power rating and SOD-80 packaging. Both are ROHS3 compliant and rated to 175°C. The impedance specification differs (40 Ω vs. 11 Ω), and forward voltage is higher (1.5 V vs. 1.1 V @ 200 mA). Direct substitution is valid for applications where these parameter variations are acceptable. TZMC5V6-GS08 includes Automotive grade qualification (AEC-Q101).

Q: What is the difference between SOD-80 and DO-213AA packaging?

A: SOD-80 (MiniMELF) and DO-213AA are both surface mount packages for small signal diodes but have different mechanical footprints and land patterns. SOD-80 is a smaller cylindrical package, while DO-213AA is a larger rectangular package. Direct physical substitution requires PCB redesign. Electrical performance is independent of package format.

Q: Can 5.1 V zener diodes substitute for the 5.6 V specification?

A: Parts rated at 5.1 V fall within the ±5% tolerance band of 5.6 V (5.32 V to 5.88 V lower limit). Substitution is valid only if the application circuit design permits operation at 5.1 V instead of 5.6 V. Circuit validation is required to confirm voltage regulation performance remains acceptable. This substitution is not appropriate for applications with strict voltage regulation requirements.

Q: Why are some substitute parts RoHS non-compliant?

A: RoHS compliance status reflects the manufacturing date and regulatory requirements at the time of production. Non-compliant parts may contain restricted substances. Selection of RoHS-compliant alternatives is required for applications subject to RoHS regulations (EU Directive 2011/65/EU and amendments). Verify regulatory requirements for your application before selecting non-compliant alternatives.

Q: What does impedance (Zzt) specification mean in zener diode selection?

A: Impedance (Zzt) is the dynamic impedance of the zener diode at the specified test current. Lower impedance indicates better voltage regulation stability and lower output impedance. The TZM5232B-GS18 specifies 11 Ω impedance. Substitute parts with higher impedance (40 Ω, 1400 Ω, 1500 Ω, 1550 Ω) exhibit different voltage regulation characteristics. Selection depends on circuit requirements for voltage stability and load regulation performance.

Q: Is extended temperature range (-65°C to 175°C) a benefit over 175°C maximum?

A: Extended low-temperature operation (-65°C) is beneficial for applications requiring cold environment performance. The TZM5232B-GS18 specifies 175°C maximum operating temperature without a lower limit specification. Microchip alternatives (1N4626UR-1, 1N5231BUR-1, 1N5523BUR-1, CDLL4624, CDLL4625, CDLL751A) specify -65°C to 175°C range. Selection of extended range parts is appropriate only if low-temperature operation is required by the application.

Q: Can CDLL4624 (4.7 V) be used instead of TZM5232B-GS18 (5.6 V)?

A: CDLL4624 operates at 4.7 V nominal, which is outside the ±5% tolerance band of 5.6 V (acceptable range: 5.32 V to 5.88 V). Direct substitution is not valid without circuit redesign and validation. This part is listed in the substitute database but requires engineering assessment to confirm voltage regulation performance is acceptable for the specific application.

Q: What is Moisture Sensitivity Level (MSL) 1?

A: MSL 1 indicates unlimited moisture sensitivity, meaning the component does not require special moisture control during storage, handling, or assembly. Both the TZM5232B-GS18 and all substitute parts are rated MSL 1, eliminating moisture-related compatibility concerns during manufacturing and assembly processes.

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