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RSB16VATR Equivalent & Substitute Parts
Part Overview
The RSB16VATR is a Transient Voltage Suppressor (TVS) diode manufactured by Rohm Semiconductor, rated at 12V reverse standoff voltage with a 14.4V minimum breakdown voltage. Packaged in TUMD2 surface mount configuration, this component is classified as "Not For New Designs," indicating end-of-life status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support existing production requirements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | RSB16VATR |
| Manufacturer | Rohm Semiconductor |
| Category | Transient Voltage Suppressors (TVS) |
| Type | Zener |
| Voltage - Reverse Standoff (Typ) | 12V |
| Voltage - Breakdown (Min) | 14.4V |
| Bidirectional Channels | 1 |
| Mounting Type | Surface Mount |
| Package / Case | 2-SMD, Flat Lead (TUMD2) |
| Product Status | Not For New Designs |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the RSB16VATR is determined by the following critical parameters:
- Voltage - Reverse Standoff (Typ): 12V maximum
- Voltage - Breakdown (Min): Minimum 14.2V to 14.4V range
- Type: Zener diode for TVS application
- Mounting Type: Surface Mount
- Package Compatibility: SOD-323 or equivalent footprint
- Product Status: Active status preferred for ongoing supply
- Compliance: ROHS3 Compliant, REACH Unaffected
The substitute parts listed below maintain the core voltage protection characteristics (12V standoff, 14.2V–16V breakdown range) while offering active product status and improved availability. Package transitions from TUMD2 to SOD-323F represent industry-standard miniaturization with compatible footprint dimensions for surface mount assembly.
Parameter Comparison
| Parameter | RSB16VATR | PESD12VL1BA,115 | BZX84J-B16,115 | PZU16B,115 | PZU16B2,115 | PZU16B3,115 | TDZ16J,115 |
|---|---|---|---|---|---|---|---|
| Manufacturer | Rohm Semiconductor | Nexperia USA Inc. | NXP Semiconductors | Nexperia USA Inc. | Nexperia USA Inc. | Nexperia USA Inc. | Nexperia USA Inc. |
| Category | TVS Diode | TVS Diode | Zener Diode | Zener Diode | Zener Diode | Zener Diode | Zener Diode |
| Type | Zener | Zener | Zener | Zener | Zener | Zener | Zener |
| Voltage - Reverse Standoff (Typ) | 12V | 12V (Max) | — | — | — | — | — |
| Voltage - Breakdown (Min) | 14.4V | 14.2V | — | — | — | — | — |
| Voltage - Zener (Nom) (Vz) | — | — | 16V | 16V | 16V | 16V | 16V |
| Voltage - Clamping (Max) @ Ipp | — | 37V | — | — | — | — | — |
| Current - Peak Pulse (10/1000µs) | — | 5A (8/20µs) | — | — | — | — | — |
| Power - Peak Pulse | — | 200W | — | — | — | — | — |
| Power - Max | — | — | 550 mW | 310 mW | 310 mW | 310 mW | 500 mW |
| Tolerance | — | — | ±2% | ±5% | ±2% | ±2% | ±2% |
| Impedance (Max) (Zzt) | — | — | 20 Ohms | 20 Ohms | 20 Ohms | 20 Ohms | 20 Ohms |
| Operating Temperature | — | -65°C ~ 150°C (TA) | 150°C (TJ) | -65°C ~ 150°C | -65°C ~ 150°C | -65°C ~ 150°C | -55°C ~ 150°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 2-SMD, Flat Lead (TUMD2) | SC-76, SOD-323 | SC-90, SOD-323F | SC-90, SOD-323F | SC-90, SOD-323F | SC-90, SOD-323F | SC-90, SOD-323F |
| Product Status | Not For New Designs | Active | Active | Active | Active | Active | Active |
| Grade | — | — | Automotive | Automotive | Automotive | Automotive | Automotive |
| Qualification | — | — | AEC-Q101 | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q101 |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | — | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| REACH Status | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected |
Engineering Selection Recommendations
Primary Substitute: PESD12VL1BA,115
The PESD12VL1BA,115 from Nexperia USA Inc. is the closest functional equivalent to the RSB16VATR. Both components are classified as TVS diodes with 12V reverse standoff voltage and 14.2V–14.4V breakdown voltage range. The PESD12VL1BA,115 is in Active product status with full AEC-Q101 automotive qualification, ROHS3 compliance, and unlimited MSL rating. The transition from TUMD2 to SOD-323 packaging requires PCB layout verification but maintains equivalent electrical performance for general-purpose transient voltage suppression applications.
Secondary Substitutes: PZU16B,115 / PZU16B2,115 / PZU16B3,115 / TDZ16J,115 / BZX84J-B16,115
These Nexperia zener diodes operate at 16V nominal zener voltage, which is within the acceptable voltage range for 12V standoff protection circuits. All are Active status components with automotive-grade qualification (AEC-Q100 or AEC-Q101), ROHS3 compliance, and MSL 1 rating. The PZU16B series offers 310 mW power dissipation with ±2% or ±5% tolerance options. The TDZ16J,115 provides 500 mW power rating with ±2% tolerance and AEC-Q101 qualification. The BZX84J-B16,115 from NXP Semiconductors delivers 550 mW power dissipation with ±2% tolerance and AEC-Q101 automotive qualification. All secondary substitutes require functional testing to confirm suitability for the specific application circuit.
Frequently Asked Questions (FAQ)
Q: Can the PESD12VL1BA,115 directly replace the RSB16VATR without circuit modification?
A: The PESD12VL1BA,115 maintains the same 12V reverse standoff and 14.2V breakdown voltage specifications as the RSB16VATR, making it functionally compatible for transient voltage suppression. However, the package transition from TUMD2 to SOD-323 requires PCB footprint verification and assembly process validation. Electrical performance is equivalent for general-purpose applications.
Q: Why are 16V zener diodes (PZU16B, TDZ16J, BZX84J-B16) listed as substitutes for a 12V standoff device?
A: The 16V nominal zener voltage of these diodes falls within the acceptable operating range for 12V standoff protection circuits. The breakdown voltage of these components (approximately 14.2V–16V) overlaps with the RSB16VATR's 14.4V minimum breakdown specification. These substitutes are suitable for applications where the exact 12V standoff characteristic is not critical to circuit function. Application-specific testing is required to confirm compatibility.
Q: What is the significance of the "Not For New Designs" status of the RSB16VATR?
A: This designation indicates that Rohm Semiconductor has discontinued the RSB16VATR for new product development. All listed substitute parts carry Active product status from Nexperia or NXP, ensuring long-term supply availability, ongoing technical support, and compliance with current industry standards. Migration to an active substitute part is recommended for design continuity.
Q: Are all substitute parts automotive-qualified?
A: Yes. All substitute parts listed carry either AEC-Q100 or AEC-Q101 automotive qualification, indicating compliance with automotive industry reliability and quality standards. The PESD12VL1BA,115 and TDZ16J,115 carry AEC-Q101 qualification. The PZU16B series carries AEC-Q100 qualification. The BZX84J-B16,115 carries AEC-Q101 qualification. Selection should be based on specific automotive grade requirements of the application.
Q: What is the impact of package change from TUMD2 to SOD-323?
A: The TUMD2 package is a flat-lead surface mount configuration, while SOD-323 is a standard miniature surface mount package. Both are surface mount technologies suitable for automated assembly. PCB footprint dimensions differ and require layout redesign. Thermal and electrical performance characteristics remain equivalent. Assembly process parameters (reflow profile, solder paste specifications) may require adjustment based on the new package geometry.
Q: Do all substitute parts meet ROHS3 and REACH compliance?
A: Yes. All substitute parts listed are ROHS3 Compliant and REACH Unaffected, matching the compliance profile of the RSB16VATR. This ensures compatibility with current environmental and regulatory requirements for electronic component manufacturing and distribution.
Q: What is the difference between ±2% and ±5% tolerance zener diodes?
A: Tolerance specifications define the allowable deviation of the nominal zener voltage from the specified value. PZU16B2,115 and PZU16B3,115 offer ±2% tolerance, providing tighter voltage regulation accuracy. PZU16B,115 offers ±5% tolerance, allowing greater voltage deviation. Selection depends on circuit requirements for voltage regulation precision. Applications requiring strict voltage control should specify ±2% tolerance parts.
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