ZMM5231B-13 Equivalent & Substitute Parts

Part Overview

The ZMM5231B-13 is a 5.1 V Zener diode rated at 500 mW with ±5% tolerance, manufactured by Vishay General Semiconductor - Diodes Division in DO-213AA surface mount package. This part is classified as obsolete, necessitating identification of active equivalent alternatives for ongoing production and maintenance applications. Substitute parts must maintain identical electrical specifications and package compatibility to ensure direct replacement capability in existing circuit designs.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	5.1	V
Tolerance	±5%	—
Power - Max	500	mW
Impedance (Max)	17	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 2 V
Voltage - Forward (Vf) (Max) @ If	1.5	V @ 200 mA
Operating Temperature Range	-65 to 175	°C
Mounting Type	Surface Mount	—
Package / Case	DO-213AA	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the ZMM5231B-13 are qualified based on the following critical parameters:

Electrical Equivalence Criteria:

Voltage - Zener (Nom): 5.1 V (exact match required)
Power - Max: 500 mW (exact match required)
Impedance (Max): 17 Ohms (exact match required)
Current - Reverse Leakage @ Vr: 5 µA @ 2 V (exact match required)
Operating Temperature Range: -65°C to 175°C (exact match required)

Mechanical Equivalence Criteria:

Package / Case: DO-213AA (exact match required)
Mounting Type: Surface Mount (exact match required)

Compliance Criteria:

RoHS Status: ROHS3 Compliant (required)

All seven substitute parts listed below meet these criteria. Variations in tolerance (±1%, ±2%, ±5%) and forward voltage (1.1 V vs. 1.5 V) represent tighter specifications or improved performance characteristics while maintaining full electrical and mechanical compatibility. Military-grade qualification (MIL-PRF-19500/127) and active product status distinguish substitute parts from the obsolete main part.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power Max	Zzt (Max)	Ir @ Vr	Vf (Max) @ If	Temp Range	Package	Status	Grade
ZMM5231B-13	Vishay	5.1 V	±5%	500 mW	17 Ω	5 µA @ 2 V	1.5 V @ 200 mA	-65 to 175°C	DO-213AA	Obsolete	Commercial
JAN1N751AUR-1/TR	Microchip	5.1 V	±5%	500 mW	17 Ω	5 µA @ 2 V	1.1 V @ 200 mA	-65 to 175°C	DO-213AA	Active	Military
JAN1N751CUR-1/TR	Microchip	5.1 V	±2%	500 mW	17 Ω	5 µA @ 2 V	1.1 V @ 200 mA	-65 to 175°C	DO-213AA	Active	Military
JAN1N751DUR-1/TR	Microchip	5.1 V	±1%	500 mW	17 Ω	5 µA @ 2 V	1.1 V @ 200 mA	-65 to 175°C	DO-213AA	Active	Military
JANTX1N751CUR-1/TR	Microchip	5.1 V	±2%	500 mW	17 Ω	5 µA @ 2 V	1.1 V @ 200 mA	-65 to 175°C	DO-213AA	Active	Military
JANTXV1N751AUR-1/TR	Microchip	5.1 V	±5%	500 mW	17 Ω	5 µA @ 2 V	1.1 V @ 200 mA	-65 to 175°C	DO-213AA	Active	Military
JANTXV1N751CUR-1/TR	Microchip	5.1 V	±2%	500 mW	17 Ω	5 µA @ 2 V	1.1 V @ 200 mA	-65 to 175°C	DO-213AA	Active	Military
JANTXV1N751DUR-1/TR	Microchip	5.1 V	±1%	500 mW	17 Ω	5 µA @ 2 V	1.1 V @ 200 mA	-65 to 175°C	DO-213AA	Active	Military

Engineering Selection Recommendations

All seven substitute parts are manufactured by Microchip Technology and carry active product status, ensuring long-term availability and supply chain continuity. Each substitute part is qualified to MIL-PRF-19500/127 military specification and maintains ROHS3 compliance.

Selection by Tolerance Requirement:

±5% Tolerance: JAN1N751AUR-1/TR or JANTXV1N751AUR-1/TR match the original ZMM5231B-13 tolerance specification. JANTXV1N751AUR-1/TR provides enhanced screening and environmental qualification.
±2% Tolerance: JAN1N751CUR-1/TR, JANTX1N751CUR-1/TR, or JANTXV1N751CUR-1/TR offer tighter voltage regulation with improved accuracy. JANTX and JANTXV variants provide extended temperature screening and burn-in qualification.
±1% Tolerance: JAN1N751DUR-1/TR or JANTXV1N751DUR-1/TR deliver the highest voltage accuracy for precision regulation circuits. JANTXV1N751DUR-1/TR includes additional environmental stress screening.

Selection by Grade Requirement:

Standard Military Grade (JAN): Suitable for standard military and aerospace applications requiring MIL-PRF-19500/127 qualification.
Extended Temperature Screening (JANTX): Includes additional temperature cycling and burn-in for enhanced reliability in demanding environments.
Extended Temperature and Voltage Screening (JANTXV): Provides maximum qualification with both extended temperature and voltage stress screening, recommended for critical applications.

All substitute parts feature improved forward voltage characteristics (1.1 V vs. 1.5 V @ 200 mA), resulting in lower power dissipation and improved thermal performance compared to the original part.

Frequently Asked Questions (FAQ)

Q: Can JAN1N751CUR-1/TR directly replace ZMM5231B-13 in existing designs?

A: Yes. JAN1N751CUR-1/TR maintains identical electrical specifications (5.1 V, 500 mW, 17 Ω impedance, 5 µA reverse leakage) and DO-213AA package compatibility. The ±2% tolerance is tighter than the original ±5%, providing improved voltage regulation accuracy. Forward voltage is lower (1.1 V vs. 1.5 V), reducing power dissipation.

Q: What is the difference between JAN, JANTX, and JANTXV part number prefixes?

A: All three are military-grade variants qualified to MIL-PRF-19500/127. JAN represents standard military qualification. JANTX includes extended temperature screening and burn-in. JANTXV includes both extended temperature and voltage stress screening, providing the highest reliability level for critical applications.

Q: Are all substitute parts available in Tape & Reel (TR) packaging?

A: Yes. All seven substitute parts are supplied in Tape & Reel packaging, suitable for automated assembly processes.

Q: Does the lower forward voltage (1.1 V vs. 1.5 V) affect circuit compatibility?

A: No. Forward voltage specification applies to forward-biased operation. In Zener diode applications, the device operates in reverse-bias mode where the Zener voltage (5.1 V) determines circuit behavior. Lower forward voltage improves efficiency in any forward-bias scenarios without affecting reverse-bias regulation performance.

Q: Which substitute part should be selected for maximum voltage accuracy?

A: JAN1N751DUR-1/TR or JANTXV1N751DUR-1/TR offer ±1% tolerance, the tightest specification available. JANTXV1N751DUR-1/TR is recommended for applications requiring maximum reliability and environmental qualification.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What inventory levels are available for each substitute part?

A: JAN1N751AUR-1/TR: 825 pcs; JAN1N751CUR-1/TR: 1043 pcs; JAN1N751DUR-1/TR: 893 pcs; JANTX1N751CUR-1/TR: 1024 pcs; JANTXV1N751AUR-1/TR: 715 pcs; JANTXV1N751CUR-1/TR: 921 pcs; JANTXV1N751DUR-1/TR: 776 pcs.

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