SMPZ3919B-E3/84A Equivalent & Substitute Parts

Part Overview

The SMPZ3919B-E3/84A is a Zener diode rated at 5.6 V nominal with 500 mW power dissipation in a surface mount DO-220AA package. Manufactured by Vishay General Semiconductor - Diodes Division as part of the eSMP® series, this component is classified as obsolete. Locating equivalent substitute parts is necessary due to the discontinued status of this specific part number variant, while functionally identical alternatives remain available in active production.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	5.6 V
Tolerance	±5%
Power - Max	500 mW
Impedance (Max)	5 Ohms
Current - Reverse Leakage @ Vr	200 µA @ 3 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA
Operating Temperature Range	-65°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	DO-220AA (SMP)
Series	eSMP®
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SMPZ3919B-E3/84A is based on electrical and mechanical parameter equivalence. The substitute parts SMPZ3919B-M3/84A and SMPZ3919B-M3/85A are direct functional equivalents sharing the following critical parameters:

Zener voltage: 5.6 V nominal
Tolerance: ±5%
Maximum power dissipation: 500 mW
Maximum impedance: 5 Ohms
Reverse leakage current: 200 µA @ 3 V
Forward voltage: 1.5 V @ 200 mA
Operating temperature range: -65°C ~ 150°C
Package type: DO-220AA (SMP) surface mount
Series designation: eSMP®

The primary difference between the main part and substitutes is the packaging format (bulk versus Tape & Reel) and product status (obsolete versus active). All electrical and thermal characteristics remain identical.

Parameter Comparison

Parameter	SMPZ3919B-E3/84A	SMPZ3919B-M3/84A	SMPZ3919B-M3/85A
Voltage - Zener (Nom)	5.6 V	5.6 V	5.6 V
Tolerance	±5%	±5%	±5%
Power - Max	500 mW	500 mW	500 mW
Impedance (Max)	5 Ohms	5 Ohms	5 Ohms
Current - Reverse Leakage @ Vr	200 µA @ 3 V	200 µA @ 3 V	200 µA @ 3 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA	1.5 V @ 200 mA	1.5 V @ 200 mA
Operating Temperature Range	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	DO-220AA	DO-220AA	DO-220AA
Series	eSMP®	eSMP®	eSMP®
Product Status	Obsolete	Active	Active
Packaging Format	Bulk	Tape & Reel (TR)	Tape & Reel (TR)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Both SMPZ3919B-M3/84A and SMPZ3919B-M3/85A are suitable substitutes for the obsolete SMPZ3919B-E3/84A. Selection between the two active alternatives should be based on supply chain availability and packaging requirements.

SMPZ3919B-M3/84A is recommended as the primary substitute due to higher inventory availability (7057 pieces in stock) and identical packaging designation suffix. This part maintains full electrical and mechanical compatibility with the original specification.

SMPZ3919B-M3/85A serves as a secondary alternative with lower inventory levels (1031 pieces in stock) but identical electrical performance and compliance certifications. The suffix variation reflects internal Vishay manufacturing or distribution coding and does not affect functional equivalence.

Both substitute parts carry ROHS3 compliance, REACH unaffected status, and MSL 1 rating, matching the original part's regulatory and environmental specifications. The transition from bulk to Tape & Reel packaging is standard for active production variants and presents no technical impediment to substitution in manufacturing environments equipped for automated component handling.

Frequently Asked Questions (FAQ)

Q: Are SMPZ3919B-M3/84A and SMPZ3919B-M3/85A electrically identical to SMPZ3919B-E3/84A?

A: Yes. All three part numbers share identical electrical specifications including 5.6 V nominal Zener voltage, ±5% tolerance, 500 mW power rating, 5 Ohms maximum impedance, and identical forward and reverse leakage characteristics. The differences are limited to product status and packaging format.

Q: What is the significance of the packaging format change from bulk to Tape & Reel?

A: Tape & Reel (TR) packaging is the standard format for active production components and is designed for automated pick-and-place assembly equipment. Bulk packaging is typically associated with discontinued or legacy product variants. From a functional standpoint, the component itself is identical; the difference is in how units are supplied and handled during manufacturing.

Q: Can I use SMPZ3919B-M3/85A if SMPZ3919B-M3/84A is unavailable?

A: Yes. Both active substitutes are fully interchangeable. The suffix variation (84A versus 85A) does not reflect electrical or mechanical differences. Selection between them should be based solely on availability and lead time.

Q: Are there any compliance or regulatory differences between the main part and substitutes?

A: No. All three part numbers carry identical ROHS3 compliance, REACH unaffected status, and Moisture Sensitivity Level 1 (Unlimited) ratings. Regulatory and environmental certifications are equivalent across all variants.

Q: What is the base product number, and why is it relevant?

A: The base product number is SMPZ3919. This designation groups all variants of the 5.6 V, 500 mW eSMP® Zener diode in DO-220AA packaging. The suffix extensions (B-E3/84A, B-M3/84A, B-M3/85A) indicate specific packaging, distribution, or manufacturing variants but do not alter the core electrical specification.

Q: Is the operating temperature range identical across all three part numbers?

A: Yes. All variants operate across the identical temperature range of -65°C to 150°C, ensuring thermal performance equivalence in any application environment.

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