Equivalent & Substitute Parts for 1SMB5930BT3

Part Overview

The 1SMB5930BT3 is a Zener diode rated at 16 V nominal voltage with 3 W maximum power dissipation in a surface mount SMB (DO-214AA) package. Manufactured by onsemi, this component is classified as obsolete product status. Due to its obsolete designation, identifying equivalent and substitute parts with active product status is necessary to maintain design continuity and ensure long-term supply chain reliability for new production runs and ongoing support.

Key Parameters

Parameter	Value
Voltage - Zener (Nom) (Vz)	16 V
Tolerance	±5%
Power - Max	3 W
Impedance (Max) (Zzt)	10 Ohms
Current - Reverse Leakage @ Vr	1 µA @ 12.2 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA
Operating Temperature	-65°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	DO-214AA, SMB
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 1SMB5930BT3 is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nom): 16 V (exact match required)
Tolerance: ±5% (exact match required)
Power - Max: 3 W (exact match required for direct equivalents)
Impedance (Max): 10 Ohms (exact match required)
Current - Reverse Leakage @ Vr: 1 µA @ 12.2 V (exact match required)
Mounting Type: Surface Mount (required)
Package / Case: DO-214AA, SMB (required for direct mechanical compatibility)

Secondary Compatibility Considerations:

Operating Temperature range must encompass or match the original specification
RoHS compliance status may differ between original and substitute
Forward voltage characteristics may vary within acceptable limits

Substitute parts are grouped into three categories:

Direct Manufacturer Equivalents: Same manufacturer (onsemi), identical electrical parameters, active product status
Parametric Equivalents: Same manufacturer, identical electrical parameters, automotive-grade qualification
Similar Parts: Alternative manufacturers, matching core electrical parameters (16 V, ±5%, 3 W or higher power rating), same or compatible package types

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance	Power (W)	Zzt (Ohms)	Leakage @ Vr	Vf @ If	Temp Range	Package	Product Status	RoHS
1SMB5930BT3	onsemi	16	±5%	3	10	1 µA @ 12.2 V	1.5 V @ 200 mA	-65 to 150°C	DO-214AA, SMB	Obsolete	Non-compliant
1SMB5930BT3G	onsemi	16	±5%	3	10	1 µA @ 12.2 V	1.5 V @ 200 mA	-65 to 150°C	DO-214AA, SMB	Active	ROHS3 Compliant
SZ1SMB5930BT3G	onsemi	16	±5%	3	10	1 µA @ 12.2 V	1.5 V @ 200 mA	-65 to 150°C	DO-214AA, SMB	Active	ROHS3 Compliant
3SMBJ5930B-TP	Micro Commercial Co	16	±5%	3	10	1 µA @ 12.2 V	1.5 V @ 200 mA	-55 to 150°C	DO-214AA, SMB	Active	ROHS3 Compliant
3SMAJ5930B-TP	Micro Commercial Co	16	±5%	3	10	1 µA @ 12.2 V	1.5 V @ 200 mA	-55 to 150°C	DO-214AC, SMA	Active	ROHS3 Compliant
SMAJ5930BE3/TR13	Microchip Technology	16	±5%	3	10	1 µA @ 12.2 V	1.2 V @ 200 mA	-65 to 150°C	DO-214AC, SMA	Active	ROHS3 Compliant
SMBJ5930B/TR13	Microchip Technology	16	±5%	2	10	1 µA @ 12.2 V	1.2 V @ 200 mA	-65 to 150°C	DO-214AA, SMB	Active	Non-compliant
SMBJ5930BE3/TR13	Microchip Technology	16	±5%	2	10	1 µA @ 12.2 V	1.2 V @ 200 mA	-65 to 150°C	DO-214AA, SMB	Active	ROHS3 Compliant
SMBJ4745AE3/TR13	Microchip Technology	16	±5%	2	16	5 µA @ 12.2 V	1.2 V @ 200 mA	-65 to 150°C	DO-214AA, SMB	Active	ROHS3 Compliant
SMBJ5353B-TP	Micro Commercial Co	16	±5%	5	2.5	1 µA @ 12.2 V	1.2 V @ 1 mA	-55 to 150°C	DO-214AA, SMB	Active	ROHS3 Compliant

Engineering Selection Recommendations

Tier 1 - Direct Replacement (Recommended for Obsolescence Mitigation):

1SMB5930BT3G and SZ1SMB5930BT3G are the primary recommended substitutes. Both are manufactured by onsemi with identical electrical specifications to the original 1SMB5930BT3. The 1SMB5930BT3G maintains standard commercial packaging (Cut Tape & Digi-Reel), while SZ1SMB5930BT3G is automotive-grade qualified to AEC-Q101 with Tape & Reel packaging. Both parts are active product status with ROHS3 compliance, addressing the obsolescence and regulatory compliance limitations of the original part.

Tier 2 - Parametric Equivalents (Same Electrical Performance, Alternative Packaging):

3SMBJ5930B-TP (Micro Commercial Co) and SMAJ5930BE3/TR13 (Microchip Technology) provide identical 16 V, 3 W electrical performance with active product status and ROHS3 compliance. The 3SMBJ5930B-TP uses DO-214AA (SMB) package matching the original footprint. SMAJ5930BE3/TR13 uses DO-214AC (SMA) package, which is mechanically similar but requires PCB layout verification for pin-to-pin compatibility.

Tier 3 - Reduced Power Rating Alternatives (2 W Devices):

SMBJ5930B/TR13 and SMBJ5930BE3/TR13 (Microchip Technology) maintain 16 V nominal voltage and ±5% tolerance with identical impedance (10 Ohms) but reduced maximum power rating to 2 W. These parts are suitable only for applications where the original 3 W specification is not a hard requirement. SMBJ5930BE3/TR13 is ROHS3 compliant; SMBJ5930B/TR13 is not.

Tier 4 - Higher Power Rating Alternative (5 W Device):

SMBJ5353B-TP (Micro Commercial Co) provides 16 V nominal voltage with increased 5 W power rating, suitable for applications requiring higher thermal margin. This part maintains DO-214AA (SMB) package compatibility and ROHS3 compliance. The reduced impedance (2.5 Ohms) and different forward voltage characteristics require circuit validation.

Compliance Considerations:

The original 1SMB5930BT3 is RoHS non-compliant. All recommended Tier 1 and Tier 2 substitutes are ROHS3 compliant, supporting modern manufacturing and environmental regulations. For applications with legacy RoHS exemptions, SMBJ5930B/TR13 remains non-compliant but is otherwise electrically equivalent.

Frequently Asked Questions (FAQ)

Q: Can 1SMB5930BT3G be used as a direct drop-in replacement for 1SMB5930BT3?

A: Yes. The 1SMB5930BT3G is electrically and mechanically identical to the original part with identical voltage (16 V), tolerance (±5%), power rating (3 W), impedance (10 Ohms), and operating temperature range (-65°C to 150°C). The primary difference is active product status and ROHS3 compliance. Packaging is compatible with standard SMB footprints.

Q: What is the difference between 1SMB5930BT3G and SZ1SMB5930BT3G?

A: Both parts are manufactured by onsemi with identical electrical specifications. SZ1SMB5930BT3G is automotive-grade qualified to AEC-Q101 standard, making it suitable for automotive and high-reliability applications. 1SMB5930BT3G is standard commercial grade. SZ1SMB5930BT3G is supplied in Tape & Reel packaging; 1SMB5930BT3G is available in Cut Tape & Digi-Reel. Selection depends on application requirements and packaging preferences.

Q: Can I use SMAJ5930BE3/TR13 instead of the original 1SMB5930BT3?

A: SMAJ5930BE3/TR13 provides identical electrical performance (16 V, ±5%, 3 W, 10 Ohms impedance) and is manufactured by Microchip Technology with active product status and ROHS3 compliance. However, it uses DO-214AC (SMA) package instead of DO-214AA (SMB). While both are surface mount packages, the physical dimensions and PCB footprint differ. PCB layout verification is required before substitution.

Q: Why would I choose a 2 W device like SMBJ5930BE3/TR13 over the 3 W original?

A: The 2 W variants (SMBJ5930B/TR13 and SMBJ5930BE3/TR13) are suitable only for applications where continuous power dissipation does not exceed 2 W. These parts maintain identical voltage (16 V), tolerance (±5%), and impedance (10 Ohms) characteristics. Selection is appropriate for cost optimization in power-limited circuits. SMBJ5930BE3/TR13 is ROHS3 compliant; SMBJ5930B/TR13 is not.

Q: Is SMBJ5353B-TP a suitable replacement for higher power applications?

A: SMBJ5353B-TP provides 16 V nominal voltage with increased 5 W power rating, making it suitable for applications requiring higher thermal margin than the original 3 W specification. It maintains DO-214AA (SMB) package compatibility and ROHS3 compliance. However, impedance is reduced to 2.5 Ohms (compared to 10 Ohms in the original), and forward voltage characteristics differ. Circuit validation is required to confirm compatibility.

Q: What does ROHS3 compliance mean for my application?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. This is mandatory for most commercial and industrial applications in regulated markets. The original 1SMB5930BT3 is RoHS non-compliant; all recommended Tier 1 and Tier 2 substitutes are ROHS3 compliant, supporting modern manufacturing standards.

Q: Can I mix different manufacturers in the same design?

A: Yes. All recommended substitutes maintain identical core electrical parameters (16 V nominal, ±5% tolerance, 10 Ohms impedance, 1 µA reverse leakage). Substitutes from onsemi, Micro Commercial Co, and Microchip Technology are electrically interchangeable within their specified power ratings. Verify package compatibility with your PCB footprint before implementation.

Q: What is the operating temperature difference between -55°C and -65°C minimum?

A: The original 1SMB5930BT3 and most onsemi/Microchip variants operate from -65°C minimum. Micro Commercial Co parts (3SMBJ5930B-TP, 3SMAJ5930B-TP, SMBJ5353B-TP) operate from -55°C minimum. For applications requiring operation below -55°C, select parts with -65°C minimum specification. For standard commercial applications, -55°C minimum is typically sufficient.

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