1N4747AW-TP Equivalent & Substitute Parts

Part Overview

The 1N4747AW-TP is a Zener diode rated at 20 V nominal voltage with 1 W maximum power dissipation in a surface mount SOD-123 package. Manufactured by Micro Commercial Co, this component is classified as obsolete product status. Locating equivalent and substitute parts is necessary due to the obsolete designation, which may result in limited availability or discontinuation of supply from original sources. Substitute parts with matching electrical specifications and compatible packaging enable continued system design and production support.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	20	V
Tolerance	±5%	%
Power - Max	1	W
Impedance (Max)	22	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 15.2 V
Voltage - Forward (Vf) (Max) @ If	1.2	V @ 200 mA
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	SOD-123	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the 1N4747AW-TP are selected based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Critical Matching Parameters:

Zener voltage: 20 V nominal
Power rating: 1 W maximum
Tolerance: ±5%
Operating temperature range: -55°C to 150°C
Surface mount configuration
SOD-123 or SOD-123F package compatibility
RoHS3 compliance

Substitute parts must maintain identical zener voltage and power dissipation ratings to ensure functional equivalence in circuit applications. Package variants within the SOD-123 family (SOD-123 and SOD-123F) are mechanically compatible for PCB assembly. All substitute parts listed meet RoHS3 compliance and MSL Level 1 requirements, ensuring environmental and moisture handling compatibility with the original part.

Parameter Comparison

Parameter	1N4747AW-TP	DFLZ20-TP	MM1W20
Manufacturer	Micro Commercial Co	Micro Commercial Co	NextGen Components
Voltage - Zener (Nom)	20 V	20 V	20 V
Tolerance	±5%	±5%	±5%
Power - Max	1 W	1 W	1 W
Impedance (Max)	22 Ohms	15 Ohms	22 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 15.2 V	1 µA @ 15 V	5 µA @ 15 V
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 200 mA	1.2 V @ 200 mA	1.2 V @ 10 mA
Operating Temperature Range	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOD-123	SOD-123F	SOD-123
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

DFLZ20-TP is a direct substitute manufactured by Micro Commercial Co with active product status. This part maintains identical zener voltage, power rating, and tolerance specifications. The SOD-123F package variant is mechanically compatible with SOD-123 footprints on PCBs. DFLZ20-TP exhibits lower impedance (15 Ohms versus 22 Ohms) and reduced reverse leakage current (1 µA versus 5 µA), representing improved electrical performance characteristics. ROHS3 compliance and MSL Level 1 rating ensure full compatibility with the original part's environmental and handling requirements. Active product status provides assured long-term availability.

MM1W20 is a parametric equivalent manufactured by NextGen Components with active product status. This part matches the zener voltage, power rating, tolerance, impedance, and operating temperature range of the original 1N4747AW-TP. The MM1W20 is supplied in SOD-123 packaging, identical to the original part. RoHS compliance and MSL Level 1 rating satisfy environmental requirements. The MM1W20 series designation indicates a dedicated product line for 1 W zener diodes. Active product status and high inventory availability (21,106 pieces) support production continuity.

Both substitute parts are suitable for direct replacement in applications requiring 20 V, 1 W zener diode functionality. Selection between DFLZ20-TP and MM1W20 depends on manufacturer preference, supply chain considerations, and specific circuit performance requirements related to impedance and leakage current specifications.

Frequently Asked Questions (FAQ)

Q: Can DFLZ20-TP be used as a direct replacement for 1N4747AW-TP?

A: Yes. DFLZ20-TP meets all critical electrical specifications: 20 V zener voltage, 1 W power rating, ±5% tolerance, and -55°C to 150°C operating range. The SOD-123F package is mechanically compatible with SOD-123 PCB footprints. Both parts are ROHS3 compliant with MSL Level 1 rating.

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

A: SOD-123F is a variant of the SOD-123 package family. Both are surface mount packages with compatible PCB footprints and lead configurations. The "F" designation indicates a specific manufacturing variant. Mechanical compatibility allows use of SOD-123F components in SOD-123 footprints.

Q: How do impedance differences affect circuit performance?

A: Impedance (Zzt) affects the dynamic resistance of the zener diode. DFLZ20-TP has lower impedance (15 Ohms) compared to 1N4747AW-TP and MM1W20 (22 Ohms). Lower impedance results in better voltage regulation under load changes. For most applications, both values are acceptable; however, circuits requiring tighter voltage regulation may benefit from the lower impedance of DFLZ20-TP.

Q: Why is reverse leakage current specified at different voltage levels?

A: Reverse leakage current is voltage-dependent. The 1N4747AW-TP specifies 5 µA @ 15.2 V, while DFLZ20-TP specifies 1 µA @ 15 V. These measurements are taken at slightly different reverse bias voltages. Lower leakage current indicates better diode quality and reduced power dissipation in standby conditions.

Q: Are all substitute parts RoHS compliant?

A: Yes. 1N4747AW-TP is ROHS3 compliant. DFLZ20-TP is ROHS3 compliant. MM1W20 is RoHS compliant. All parts meet environmental and hazardous substance restrictions for electronic components.

Q: What does MSL Level 1 mean for moisture sensitivity?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture control requirements. Components rated MSL 1 do not require special drying or moisture-barrier packaging. All three parts (1N4747AW-TP, DFLZ20-TP, and MM1W20) are rated MSL 1, ensuring identical handling and storage requirements.

Q: Why is 1N4747AW-TP marked as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. DFLZ20-TP and MM1W20 are active products with ongoing manufacturing and supply availability. Using active substitute parts ensures long-term component availability for production and field service applications.

Q: Can MM1W20 be used interchangeably with DFLZ20-TP?

A: Yes, within the constraints of the specified parameters. Both parts provide 20 V, 1 W zener functionality with ±5% tolerance and -55°C to 150°C operating range. MM1W20 uses SOD-123 packaging (identical to the original), while DFLZ20-TP uses SOD-123F (compatible variant). Impedance differs slightly (22 Ohms versus 15 Ohms), which may affect voltage regulation performance in specific circuit designs.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message