1N5992B-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N5992B-TP is a 4.7 V zener diode rated for 500 mW power dissipation in a DO-35 through-hole package, manufactured by Micro Commercial Co. This part is classified as obsolete, necessitating identification of active equivalent and substitute components 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 available packaging and delivery formats.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	4.7	V
Tolerance	±5%	—
Power - Max	500	mW
Impedance (Max)	70	Ohms
Current - Reverse Leakage @ Vr	3	µA @ 1.5 V
Voltage - Forward (Max) @ If	1.5	V @ 100 mA
Operating Temperature	-65 to 200	°C
Mounting Type	Through Hole	—
Package / Case	DO-204AH, DO-35, Axial	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the 1N5992B-TP is determined by the following critical parameters:

Primary Electrical Criteria:

Zener voltage: 4.7 V nominal
Power rating: 500 mW maximum
Tolerance: ±5% or tighter
Operating temperature range: minimum -65°C to 200°C or compatible subset

Mechanical Criteria:

Package type: DO-35 (DO-204AH) through-hole axial configuration
Lead compatibility: standard axial leads for through-hole mounting

Compliance Criteria:

RoHS3 compliance required
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into two categories:

Direct Electrical Equivalents (±5% Tolerance): Parts maintaining the original ±5% tolerance specification with identical zener voltage and power rating.

Enhanced Tolerance Alternatives (±2% Tolerance): Parts offering tighter tolerance specifications with automotive-grade qualification (AEC-Q101), suitable for applications requiring improved voltage regulation accuracy.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance	Power (mW)	Zzt (Ohms)	Leakage @ Vr (µA)	Vf Max @ If	Temp Range (°C)	Status	Packaging
1N5992B-TP	Micro Commercial Co	4.7	±5%	500	70	3 @ 1.5 V	1.5 @ 100 mA	-65 to 200	Obsolete	DO-35
1N5992B BK PBFREE	Central Semiconductor Corp	4.7	±5%	500	70	3 @ 1.5 V	1.5 @ 100 mA	-65 to 200	Active	Bulk
1N750A BK PBFREE	Central Semiconductor Corp	4.7	±5%	500	19	2 @ 1 V	1.5 @ 200 mA	-65 to 200	Active	Bulk
1N750A TR PBFREE	Central Semiconductor Corp	4.7	±5%	500	19	2 @ 1 V	1.5 @ 200 mA	-65 to 200	Active	Cut Tape
1N5230B-TR	Vishay General Semiconductor	4.7	±5%	500	19	5 @ 2 V	1.1 @ 200 mA	Not specified	Active	Cut Tape
1N5230C-TAP	Vishay General Semiconductor	4.7	±2%	500	19	5 @ 2 V	1.1 @ 200 mA	-65 to 175	Active	Tape & Box
1N5230C-TR	Vishay General Semiconductor	4.7	±2%	500	19	5 @ 2 V	1.1 @ 200 mA	-65 to 175	Active	Tape & Reel
BZX55B4V7-TAP	Vishay General Semiconductor	4.7	±2%	500	80	0.5 @ 1 V	1.5 @ 200 mA	-65 to 175	Active	Cut Tape
BZX55B4V7-TR	Vishay General Semiconductor	4.7	±2%	500	80	0.5 @ 1 V	1.5 @ 200 mA	-65 to 175	Active	Tape & Reel
BZX55C4V7-TAP	Vishay General Semiconductor	4.7	±5%	500	60	0.5 @ 1 V	1.5 @ 200 mA	-65 to 175	Active	Cut Tape
BZX55C4V7-TR	Vishay General Semiconductor	4.7	±5%	500	60	0.5 @ 1 V	1.5 @ 200 mA	-65 to 175	Active	Tape & Reel

Engineering Selection Recommendations

Direct Replacement (Identical Electrical Specifications):

The 1N5992B BK PBFREE from Central Semiconductor Corp provides direct electrical equivalence to the obsolete 1N5992B-TP. This part maintains the ±5% tolerance, 70 Ohm impedance, and full -65°C to 200°C operating temperature range. The part is active and RoHS3 compliant. Selection of this part requires confirmation of bulk packaging compatibility with assembly processes.

Active Alternatives with Equivalent Performance:

The 1N750A series (BK PBFREE and TR PBFREE variants) from Central Semiconductor Corp offers active status with identical zener voltage, tolerance, and operating temperature range. These parts feature improved impedance characteristics (19 Ohms versus 70 Ohms) and lower reverse leakage current, providing enhanced voltage regulation stability. Both bulk and cut tape packaging options are available.

Automotive-Grade Alternatives with Enhanced Tolerance:

The 1N5230C series (TAP and TR variants) and BZX55B4V7 series from Vishay General Semiconductor provide AEC-Q101 automotive qualification with ±2% tolerance. These parts are suitable for applications requiring tighter voltage regulation. Operating temperature is limited to -65°C to 175°C, which is acceptable for most applications but does not extend to the original 200°C maximum. These parts are active with high inventory availability.

Standard Tolerance Automotive Alternatives:

The BZX55C4V7 series (TAP and TR variants) from Vishay General Semiconductor maintains ±5% tolerance with AEC-Q101 qualification. Operating temperature range is -65°C to 175°C. These parts feature lower reverse leakage current (500 nA) and are available in high quantities.

Selection Criteria by Application:

Full Temperature Range Requirement (-65°C to 200°C): Select 1N5992B BK PBFREE or 1N750A series.
Standard Temperature Range (-65°C to 175°C) with Automotive Qualification: Select 1N5230C series or BZX55 series.
Packaging Preference: Bulk packaging available from Central Semiconductor Corp; cut tape and tape & reel options available from Vishay General Semiconductor.
Voltage Regulation Precision: ±2% tolerance parts (1N5230C, BZX55B4V7) provide superior performance over ±5% tolerance alternatives.

Frequently Asked Questions (FAQ)

Q: Can the 1N750A TR PBFREE directly replace the 1N5992B-TP?

A: Yes. Both parts share identical zener voltage (4.7 V), power rating (500 mW), tolerance (±5%), and operating temperature range (-65°C to 200°C). The 1N750A TR PBFREE is active and RoHS3 compliant. The primary difference is packaging format (cut tape versus original through-hole bulk), which does not affect electrical performance.

Q: What is the difference between the 1N5230B-TR and 1N5230C-TR?

A: The 1N5230B-TR has ±5% tolerance, while the 1N5230C-TR has ±2% tolerance. Both maintain 4.7 V zener voltage and 500 mW power rating. The 1N5230C-TR provides tighter voltage regulation accuracy. Both are AEC-Q101 qualified and operate from -65°C to 175°C.

Q: Why do some substitute parts have lower impedance values?

A: Impedance variation (ranging from 19 to 80 Ohms across the substitute list) reflects different manufacturing processes and internal design characteristics. Lower impedance generally indicates better voltage regulation stability under load changes. All listed parts maintain the 4.7 V zener voltage specification and are electrically compatible for standard applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are RoHS3 compliant and have MSL rating of 1 (Unlimited), matching the original 1N5992B-TP specifications.

Q: What is the significance of AEC-Q101 qualification?

A: AEC-Q101 is an automotive industry qualification standard. Parts bearing this qualification (1N5230C series and BZX55 series) have undergone additional reliability testing and are suitable for automotive applications. Non-qualified parts (1N750A series, 1N5992B BK PBFREE) are suitable for general industrial and consumer applications.

Q: Can I use a ±2% tolerance part in place of a ±5% tolerance part?

A: Yes. A ±2% tolerance part is a superior specification and will function correctly in any application designed for ±5% tolerance. The tighter tolerance provides improved voltage regulation accuracy.

Q: What packaging formats are available?

A: Substitute parts are available in bulk, cut tape (CT), tape & box (TB), and tape & reel (TR) formats. Selection depends on assembly process requirements and order quantities. All formats maintain identical electrical performance.

Q: Is the operating temperature range critical for my application?

A: If your application requires operation at temperatures above 175°C, select parts with the full -65°C to 200°C range: 1N5992B BK PBFREE or 1N750A series. For standard applications operating below 175°C, all listed alternatives are suitable.

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