1SMB5941 Zener Diode Equivalent & Substitute Parts

Part Overview

The 1SMB5941 is a 47 V, 3 W surface mount zener diode manufactured by Taiwan Semiconductor Corporation in DO-214AA (SMB) package. This component is classified as Active and is in full production status. The device operates across a temperature range of -55°C to 150°C and complies with RoHS3 and REACH regulations. Alternative equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity across multiple manufacturers while maintaining electrical and mechanical compatibility.

Substiute Parts

1SMB5941

Taiwan Semiconductor CorporationIn Stock: 10251SMB5941 Datasheet

Current PartRFQ

3SMBJ5941B-TP

Micro Commercial CoIn Stock: 377433SMBJ5941B-TP Datasheet

DirectRFQ

1SMB5941BT3G

onsemiIn Stock: 204521SMB5941BT3G Datasheet

UpgradeRFQ

SMBJ5368B-TP

Micro Commercial CoIn Stock: 8968SMBJ5368B-TP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1SMB5941 are classified into three categories based on electrical and mechanical parameter alignment:

Direct Equivalent (3SMBJ5941B-TP): This part matches all critical electrical parameters including 47 V nominal zener voltage, 3 W maximum power rating, ±5% tolerance, 67 Ohms maximum impedance, and 1 µA reverse leakage current at 35.8 V. The package, mounting type, and operating temperature range are identical. The manufacturer is Micro Commercial Co. This part is a direct functional replacement.

Upgrade Equivalent (1SMB5941BT3G): This part matches all critical electrical parameters of the main part and adds an extended lower operating temperature limit of -65°C (versus -55°C for the main part). All other electrical specifications, package type, and compliance certifications are identical. The manufacturer is onsemi. This part provides enhanced temperature performance while maintaining full electrical compatibility.

Similar Substitute (SMBJ5368B-TP): This part shares the same 47 V nominal zener voltage, ±5% tolerance, and identical package/mounting specifications. However, it differs in power rating (5 W versus 3 W), impedance (25 Ohms versus 67 Ohms), and reverse leakage current (500 nA versus 1 µA at 35.8 V). This part is suitable for applications requiring higher power dissipation capability while maintaining the same voltage regulation characteristics. The manufacturer is Micro Commercial Co.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: The 3SMBJ5941B-TP manufactured by Micro Commercial Co is a direct functional equivalent to the 1SMB5941. All electrical parameters, package specifications, and compliance certifications are identical. This part is suitable for applications requiring an exact substitute without design modification.

For Enhanced Temperature Performance: The 1SMB5941BT3G manufactured by onsemi provides identical electrical performance to the main part with an extended lower operating temperature limit of -65°C. This part is suitable for applications operating in environments below -55°C while maintaining all other specifications. All compliance certifications remain equivalent.

For Higher Power Dissipation: The SMBJ5368B-TP manufactured by Micro Commercial Co maintains the same 47 V zener voltage and ±5% tolerance but provides 5 W maximum power rating (versus 3 W) with lower impedance (25 Ohms versus 67 Ohms) and lower reverse leakage current (500 nA versus 1 µA). This part is suitable for applications requiring higher power handling capability at the same voltage regulation point. All parts share identical package, mounting type, and compliance status.

All substitute parts listed are Active products with full RoHS3 compliance, REACH Unaffected status, and MSL 1 (Unlimited) moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can the 3SMBJ5941B-TP be used as a direct replacement for the 1SMB5941?

A: Yes. The 3SMBJ5941B-TP is a direct equivalent. All critical electrical parameters including zener voltage (47 V), power rating (3 W), tolerance (±5%), impedance (67 Ohms), and reverse leakage current (1 µA @ 35.8 V) are identical. The package (DO-214AA, SMB), mounting type (Surface Mount), and operating temperature range (-55°C to 150°C) are the same. This part is a pin-for-pin and functionally equivalent substitute.

Q: What is the difference between the 1SMB5941BT3G and the main 1SMB5941?

A: The 1SMB5941BT3G is functionally equivalent to the 1SMB5941 with one specification difference: the lower operating temperature limit is extended to -65°C (compared to -55°C for the main part). All other electrical parameters, package specifications, and compliance certifications are identical. This part is suitable for applications requiring operation at lower temperatures.

Q: When should the SMBJ5368B-TP be selected instead of the 1SMB5941?

A: The SMBJ5368B-TP should be selected when the application requires higher power dissipation capability. This part provides 5 W maximum power rating (versus 3 W), lower impedance (25 Ohms versus 67 Ohms), and lower reverse leakage current (500 nA versus 1 µA). The zener voltage (47 V) and tolerance (±5%) remain identical. The package and mounting type are the same. Selection depends on circuit power requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (3SMBJ5941B-TP, 1SMB5941BT3G, and SMBJ5368B-TP) are ROHS3 Compliant with REACH Unaffected status and MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the main 1SMB5941 part.

Q: Do all substitute parts use the same DO-214AA (SMB) package?

A: Yes. All substitute parts use the DO-214AA (SMB) package with Surface Mount mounting type. This ensures mechanical and footprint compatibility with the original 1SMB5941 design without PCB layout modifications.

Q: What is the inventory status of substitute parts?

A: The 3SMBJ5941B-TP has 37,725 pieces in stock, the 1SMB5941BT3G has 20,400 pieces in stock, and the SMBJ5368B-TP has 8,892 pieces in stock. The main 1SMB5941 has 959 pieces in stock.