1N4754AW-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N4754AW-TP is a 39 V, 1 W surface mount zener diode manufactured by Micro Commercial Co in SOD-123 package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and production continuity. The part maintains ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	39 V
Tolerance	±5%
Power - Max	1 W
Impedance (Max)	60 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 29.7 V
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 200 mA
Operating Temperature	-55°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	SOD-123
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 1N4754AW-TP is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 39 V nominal
Mounting type: Surface Mount
Package: SOD-123 or SOD-123F variants
Operating temperature range: -55°C to 150°C minimum
RoHS3 compliance

Secondary Compatibility Factors:

Tolerance: ±5% or tighter (±2%)
Power dissipation: Equal to or greater than 1 W for direct replacement; lower power ratings (410 mW, 500 mW) acceptable for reduced power applications
Impedance and reverse leakage characteristics: Acceptable within application-specific requirements

Substitute parts are grouped into two categories: direct replacements maintaining 1 W power rating, and functional equivalents with reduced power ratings suitable for lower-current applications.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power Max	Zzt (Max)	Package	Status
1N4754AW-TP	Micro Commercial Co	39 V	±5%	1 W	60 Ohms	SOD-123	Obsolete
DFLZ39-TP	Micro Commercial Co	39 V	±5%	1 W	40 Ohms	SOD-123F	Active
BZT52B39-E3-08	Vishay General Semiconductor	39 V	±2%	410 mW	87 Ohms	SOD-123	Active
BZT52B39-E3-18	Vishay General Semiconductor	39 V	±2%	410 mW	87 Ohms	SOD-123	Active
BZT52B39-G3-08	Vishay General Semiconductor	39 V	±2%	410 mW	87 Ohms	SOD-123	Active
BZT52B39-G3-18	Vishay General Semiconductor	39 V	±2%	410 mW	87 Ohms	SOD-123	Active
BZT52C39-13-F	Diodes Incorporated	39 V	±5%	500 mW	130 Ohms	SOD-123	Active
BZT52C39-7-F	Diodes Incorporated	39 V	±5%	500 mW	130 Ohms	SOD-123	Active
BZT52C39-E3-08	Vishay General Semiconductor	39 V	±5%	410 mW	87 Ohms	SOD-123	Active
BZT52C39-E3-18	Vishay General Semiconductor	39 V	±5%	410 mW	87 Ohms	SOD-123	Active
BZT52C39-G3-08	Vishay General Semiconductor	39 V	±5%	410 mW	87 Ohms	SOD-123	Active

Engineering Selection Recommendations

Direct Replacement (Preferred for 1 W Applications):

DFLZ39-TP from Micro Commercial Co is the primary direct replacement for 1N4754AW-TP. Both parts share identical zener voltage (39 V), tolerance (±5%), power rating (1 W), and operating temperature range (-55°C to 150°C). DFLZ39-TP uses SOD-123F package variant and maintains ROHS3 compliance. This part is currently active with substantial inventory availability (90,200 units).

Functional Equivalents (For Reduced Power Applications):

Vishay BZT52 series parts (BZT52B39-E3-08, BZT52B39-E3-18, BZT52B39-G3-08, BZT52B39-G3-18, BZT52C39-E3-08, BZT52C39-E3-18, BZT52C39-G3-08) provide active alternatives with 39 V zener voltage and SOD-123 package. These parts feature reduced power ratings (410 mW) and improved tolerance (±2% for B-series, ±5% for C-series). All maintain ROHS3 compliance and operating temperature range compatibility.

Diodes Incorporated BZT52C39-13-F and BZT52C39-7-F offer 500 mW power rating with ±5% tolerance, SOD-123 package, and extended operating temperature range (-65°C to 150°C). These parts are suitable for applications requiring moderate power dissipation between 410 mW and 1 W.

All substitute parts listed are active products with ROHS3 compliance and MSL 1 rating, ensuring regulatory compliance and manufacturing continuity.

Frequently Asked Questions (FAQ)

Q: Can BZT52B39-E3-08 directly replace 1N4754AW-TP in all applications?

A: BZT52B39-E3-08 shares the 39 V zener voltage, SOD-123 package, and operating temperature range with 1N4754AW-TP. However, its 410 mW power rating is lower than the original 1 W specification. Direct replacement is suitable only for applications where power dissipation does not exceed 410 mW. For applications requiring full 1 W capability, DFLZ39-TP is the appropriate choice.

Q: What is the difference between SOD-123 and SOD-123F packages?

A: Both SOD-123 and SOD-123F are surface mount packages for small signal diodes with identical electrical performance and pin configuration. SOD-123F is a variant designation. Physical dimensions and PCB footprints are compatible for most applications. Verify specific package drawings if space constraints are critical.

Q: Are all listed substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance status, matching the original 1N4754AW-TP specification. All parts also carry MSL 1 (unlimited moisture sensitivity) rating.

Q: Which substitute part offers the best tolerance specification?

A: Vishay BZT52B series parts (BZT52B39-E3-08, BZT52B39-E3-18, BZT52B39-G3-08, BZT52B39-G3-18) provide ±2% tolerance, superior to the original ±5% specification. Diodes Incorporated and Vishay C-series parts maintain ±5% tolerance matching the original part.

Q: Can I use a 500 mW part where a 1 W part is specified?

A: A 500 mW part (BZT52C39-13-F or BZT52C39-7-F) can be used in applications where actual power dissipation does not exceed 500 mW. Thermal analysis of the specific application is required to confirm suitability. For designs requiring full 1 W capability, use DFLZ39-TP.

Q: What is the difference between E3 and G3 packaging designations in Vishay parts?

A: E3 and G3 designations refer to different tape and reel packaging formats used during manufacturing and distribution. Both variants are electrically identical and functionally interchangeable. Selection between E3 and G3 depends on procurement and assembly equipment compatibility.

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