1M200ZH Zener Diode Equivalent & Substitute Parts

Part Overview

The 1M200ZH is an active-status Zener diode manufactured by Taiwan Semiconductor Corporation, rated for 200 V nominal Zener voltage with 1 W maximum power dissipation. This component is packaged in DO-204AL (DO-41) axial through-hole configuration and is qualified to AEC-Q101 automotive standards with ROHS3 compliance. Substitute parts are identified based on matching nominal Zener voltage, tolerance, mounting type, and package configuration while accommodating variations in power rating, impedance, and operating temperature range.

Key Parameters

Parameter	1M200ZH
Voltage - Zener (Nom)	200 V
Tolerance	±5%
Power - Max	1 W
Impedance (Max)	1500 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 152 V
Operating Temperature	-55°C ~ 150°C
Mounting Type	Through Hole
Package / Case	DO-204AL, DO-41, Axial
RoHS Status	ROHS3 Compliant
Grade	Automotive
Qualification	AEC-Q101

Substitute Part Grouping Explanation

Substitute parts for the 1M200ZH are qualified based on the following critical parameters:

Matching Criteria:

Nominal Zener voltage of 200 V
Tolerance of ±5%
Through-hole mounting configuration
DO-204AL / DO-41 axial package compatibility

Allowable Variations:

Power rating may exceed the 1 W specification of the main part
Impedance (Zzt) may differ within the range of 1200–1500 Ohms
Reverse leakage current may be lower than the main part specification
Operating temperature range may be extended beyond -55°C ~ 150°C
RoHS compliance status may differ
Automotive qualification is not required for substitution

The 1N5956BG and 1N5956BRLG both satisfy the core electrical and mechanical substitution criteria for the 1M200ZH.

Parameter Comparison

Parameter	1M200ZH	1N5956BG	1N5956BRLG
Manufacturer	Taiwan Semiconductor Corporation	Microsemi Corporation	onsemi
Voltage - Zener (Nom)	200 V	200 V	200 V
Tolerance	±5%	±5%	±5%
Power - Max	1 W	1.25 W	3 W
Impedance (Max)	1500 Ohms	1200 Ohms	1200 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 152 V	1 µA @ 152 V	1 µA @ 152 V
Operating Temperature	-55°C ~ 150°C	-65°C ~ 175°C	-65°C ~ 200°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial
Product Status	Active	Active	Active
RoHS Status	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

1N5956BG (Microsemi Corporation): This substitute provides 1.25 W power rating, exceeding the 1 W specification of the 1M200ZH. The extended operating temperature range of -65°C ~ 175°C accommodates wider thermal environments. Lower impedance (1200 Ohms vs. 1500 Ohms) and reduced reverse leakage current (1 µA vs. 5 µA) represent improved electrical characteristics. However, RoHS non-compliance status must be evaluated against application requirements. Packaging is supplied in Bulk configuration.

1N5956BRLG (onsemi): This substitute provides the highest power rating at 3 W, offering significant thermal margin above the 1 W requirement. The extended operating temperature range of -65°C ~ 200°C supports high-temperature applications. Lower impedance (1200 Ohms) and reduced reverse leakage current (1 µA) match the 1N5956BG electrical profile. ROHS3 compliance aligns with the main part specification. Packaging is supplied in Cut Tape (CT) configuration.

Both substitutes maintain the critical 200 V nominal Zener voltage and ±5% tolerance required for functional equivalence. Selection between substitutes depends on power dissipation requirements, temperature operating range, RoHS compliance mandates, and packaging format availability.

Frequently Asked Questions (FAQ)

Q: Can the 1N5956BG substitute for the 1M200ZH in all applications?

A: The 1N5956BG matches the core electrical specifications (200 V, ±5% tolerance) and package configuration (DO-204AL axial through-hole). The higher power rating (1.25 W vs. 1 W) and extended temperature range (-65°C ~ 175°C vs. -55°C ~ 150°C) provide operational margin. However, RoHS non-compliance status requires verification against application environmental and regulatory requirements.

Q: What is the primary difference between 1N5956BG and 1N5956BRLG?

A: Both parts share identical nominal Zener voltage (200 V), tolerance (±5%), impedance (1200 Ohms), and reverse leakage current (1 µA @ 152 V). The 1N5956BRLG provides higher power dissipation (3 W vs. 1.25 W) and extended maximum operating temperature (200°C vs. 175°C). The 1N5956BRLG is ROHS3 compliant, while the 1N5956BG is not. Packaging differs: 1N5956BG is supplied in Bulk; 1N5956BRLG is supplied in Cut Tape (CT).

Q: Are all three parts physically compatible in the same circuit board footprint?

A: Yes. All three parts use the DO-204AL (DO-41) axial through-hole package configuration. Physical board layout and lead spacing are identical, allowing direct mechanical substitution without PCB redesign.

Q: Does the lower impedance of the substitute parts affect circuit performance?

A: Lower impedance (1200 Ohms vs. 1500 Ohms) in the 1N5956BG and 1N5956BRLG represents improved dynamic response characteristics. This variation is within acceptable engineering tolerance for Zener diode applications and does not require circuit redesign.

Q: Which substitute is preferred for automotive applications?

A: The 1M200ZH carries AEC-Q101 automotive qualification. The 1N5956BRLG is ROHS3 compliant, matching the main part's environmental standard. The 1N5956BG lacks RoHS compliance. For automotive applications requiring regulatory compliance, the 1N5956BRLG is the preferred substitute.

Q: Can the 1N5956BRLG be used in applications with temperature limits of -55°C ~ 150°C?

A: Yes. The 1N5956BRLG operating range of -65°C ~ 200°C fully encompasses the -55°C ~ 150°C specification. The part operates within its rated limits across the narrower temperature window.

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