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1SMB5935 R5G Equivalent & Substitute Parts
Part Overview
The 1SMB5935 R5G is a 27 V, 3 W Zener diode manufactured by Taiwan Semiconductor Corporation in the DO-214AA (SMB) surface mount package. This component is classified as discontinued at DiGi Electronics, with 933 pieces available in current inventory. The part operates across a temperature range of -55°C to 150°C and maintains ±5% voltage tolerance with a maximum impedance of 23 Ohms. Equivalent and substitute parts are necessary to support ongoing production requirements, ensure supply chain continuity, and accommodate design flexibility across multiple manufacturers while maintaining electrical and mechanical compatibility.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Zener (Nominal) | 27 | V |
| Power - Maximum | 3 | W |
| Tolerance | ±5% | — |
| Impedance (Maximum) | 23 | Ohms |
| Current - Reverse Leakage @ Vr | 1 | µA @ 20.6 V |
| Operating Temperature Range | -55 to 150 | °C |
| Mounting Type | Surface Mount | — |
| Package / Case | DO-214AA, SMB | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the 1SMB5935 R5G is determined by strict equivalence across the following critical parameters: nominal Zener voltage of 27 V, maximum power dissipation of 3 W, voltage tolerance of ±5%, maximum impedance of 23 Ohms, reverse leakage current of 1 µA at 20.6 V, operating temperature range of -55°C to 150°C, and surface mount packaging in DO-214AA (SMB) configuration. Parts are classified into three substitution categories:
Parametric Equivalents maintain all electrical specifications and differ only in packaging format (Tape & Reel versus bulk) or product status (Active versus Discontinued). These parts are direct functional replacements with identical performance characteristics.
Direct Equivalents are manufactured by alternative suppliers and maintain complete electrical and mechanical compatibility with the original part, including all voltage, power, impedance, and temperature specifications.
Upgrade Parts offer enhanced specifications such as extended temperature range (-65°C to 150°C versus -55°C to 150°C) or automotive-grade qualification (AEC-Q101), providing superior performance while maintaining backward compatibility.
Similar Parts share the same nominal voltage and package but differ in one or more critical parameters such as power rating (550 mW versus 3 W), tolerance (±2% versus ±5%), or reverse leakage current (5 µA versus 1 µA). These parts are suitable only when application requirements permit the specified deviations.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Vz (V) | Power (W) | Tolerance | Zzt (Ohms) | Ir @ Vr (µA) | Temp Range (°C) | Package | Product Status | Substitution Type |
|---|---|---|---|---|---|---|---|---|---|---|
| 1SMB5935 R5G | Taiwan Semiconductor Corporation | 27 | 3 | ±5% | 23 | 1 @ 20.6 | -55 to 150 | DO-214AA (SMB) | Discontinued | Main Part |
| 1SMB5935 | Taiwan Semiconductor Corporation | 27 | 3 | ±5% | 23 | 1 @ 20.6 | -55 to 150 | DO-214AA (SMB) | Active | Parametric Equivalent |
| 1SMB5935H | Taiwan Semiconductor Corporation | 27 | 3 | ±5% | 23 | 1 @ 20.6 | -55 to 150 | DO-214AA (SMB) | Active | Parametric Equivalent |
| 3SMBJ5935B-TP | Micro Commercial Co | 27 | 3 | ±5% | 23 | 1 @ 20.6 | -55 to 150 | DO-214AA (SMB) | Active | Direct Equivalent |
| SMBZ5935B-E3/52 | Vishay General Semiconductor - Diodes Division | 27 | 3 | ±5% | 23 | 1 @ 20.6 | -55 to 150 | DO-214AA (SMB) | Active | Direct Equivalent |
| SMBZ5935B-E3/5B | Vishay General Semiconductor - Diodes Division | 27 | 3 | ±5% | 23 | 1 @ 20.6 | -55 to 150 | DO-214AA (SMB) | Active | Direct Equivalent |
| 1SMB5935BT3G | onsemi | 27 | 3 | ±5% | 23 | 1 @ 20.6 | -65 to 150 | DO-214AA (SMB) | Active | Upgrade Part |
| SMBZ5935B-M3/52 | Vishay General Semiconductor - Diodes Division | 27 | 0.55 | ±2% | 23 | 1 @ 20.6 | -55 to 150 | DO-214AA (SMB) | Active | Similar Part |
| SMBZ5935B-M3/5B | Vishay General Semiconductor - Diodes Division | 27 | 0.55 | ±2% | 23 | 1 @ 20.6 | -55 to 150 | DO-214AA (SMB) | Active | Similar Part |
| SMZJ3799B-E3/52 | Vishay General Semiconductor - Diodes Division | 27 | 1.5 | ±5% | 23 | 5 @ 20.6 | -55 to 150 | DO-214AA (SMB) | Active | Similar Part |
| SMZJ3799B-E3/5B | Vishay General Semiconductor - Diodes Division | 27 | 1.5 | ±5% | 23 | 5 @ 20.6 | -55 to 150 | DO-214AA (SMB) | Active | Similar Part |
Engineering Selection Recommendations
For Direct Replacement: Select 1SMB5935, 1SMB5935H, 3SMBJ5935B-TP, SMBZ5935B-E3/52, or SMBZ5935B-E3/5B. These parts maintain complete electrical and mechanical equivalence to the 1SMB5935 R5G across all specified parameters. All substitute parts are currently in active production status, ensuring long-term supply availability. All parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating.
For Enhanced Performance: Select 1SMB5935BT3G manufactured by onsemi. This upgrade part extends the operating temperature range to -65°C to 150°C, providing superior low-temperature performance while maintaining all other electrical specifications. This part is suitable for applications requiring extended temperature operation.
For Reduced Power Applications: Select SMBZ5935B-M3/52 or SMBZ5935B-M3/5B. These similar parts reduce maximum power dissipation to 550 mW and improve voltage tolerance to ±2%. These parts are suitable only for applications where the reduced power rating and tighter tolerance are compatible with circuit requirements.
For Lower Power Dissipation: Select SMZJ3799B-E3/52 or SMZJ3799B-E3/5B. These similar parts reduce maximum power dissipation to 1.5 W and increase reverse leakage current to 5 µA at 20.6 V. These parts are suitable only for applications where the reduced power rating and increased leakage current are acceptable.
All recommended substitute parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8541.10.0050, maintaining regulatory equivalence with the original part.
Frequently Asked Questions (FAQ)
Q: Can 1SMB5935 be used as a direct replacement for 1SMB5935 R5G?
A: Yes. The 1SMB5935 is a parametric equivalent with identical electrical specifications (27 V, 3 W, ±5% tolerance, 23 Ohms impedance, 1 µA reverse leakage). The primary difference is product status (Active versus Discontinued) and packaging format. Both parts are manufactured by Taiwan Semiconductor Corporation in DO-214AA (SMB) package.
Q: What is the difference between 1SMB5935BT3G and the original 1SMB5935 R5G?
A: The 1SMB5935BT3G extends the operating temperature range to -65°C to 150°C compared to -55°C to 150°C on the original part. All other electrical parameters remain identical. This part is manufactured by onsemi and is classified as an upgrade part suitable for applications requiring extended low-temperature operation.
Q: Why do SMBZ5935B-M3/52 and SMBZ5935B-M3/5B have different power ratings?
A: These similar parts are rated for 550 mW maximum power dissipation compared to 3 W on the original part. They also feature improved voltage tolerance of ±2% versus ±5%. These parts are suitable only for applications where the reduced power rating and tighter tolerance are compatible with circuit design requirements.
Q: Are all substitute parts available in the same packaging format?
A: All substitute parts are available in DO-214AA (SMB) surface mount package, maintaining mechanical compatibility with the original 1SMB5935 R5G. Packaging formats vary between Tape & Reel (TR), Cut Tape (CT) & Digi-Reel®, and bulk configurations depending on the specific manufacturer part number and supplier.
Q: Do all substitute parts meet the same compliance standards as the original part?
A: Yes. All substitute parts listed maintain ROHS3 compliance, REACH unaffected status, and MSL 1 (Unlimited) moisture sensitivity rating. All parts are classified under ECCN EAR99 with HTSUS code 8541.10.0050, ensuring regulatory equivalence.
Q: What is the difference between SMZJ3799B-E3/52 and the original 1SMB5935 R5G?
A: The SMZJ3799B-E3/52 reduces maximum power dissipation to 1.5 W and increases reverse leakage current to 5 µA at 20.6 V, compared to 3 W and 1 µA on the original part. Nominal Zener voltage (27 V), tolerance (±5%), impedance (23 Ohms), and operating temperature range (-55°C to 150°C) remain identical. This part is suitable only for applications where the reduced power rating and increased leakage current are acceptable.
Q: Can 3SMBJ5935B-TP be used interchangeably with SMBZ5935B-E3/52?
A: Yes. Both parts maintain identical electrical specifications: 27 V nominal Zener voltage, 3 W maximum power, ±5% tolerance, 23 Ohms impedance, and 1 µA reverse leakage current. Both are rated for -55°C to 150°C operation in DO-214AA (SMB) package. The primary difference is manufacturer: Micro Commercial Co versus Vishay General Semiconductor - Diodes Division.
Q: Is 1SMB5935H suitable for automotive applications?
A: The 1SMB5935H is qualified to AEC-Q101 automotive standard and carries an automotive grade designation. This part is suitable for automotive applications requiring this qualification. The standard 1SMB5935 does not carry automotive qualification.
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