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onsemi SZ1SMA5922BT3G
- Part No.:
- SZ1SMA5922BT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SZ1SMA5922BT3G.pdf
- Description:
- DIODE ZENER 7.5V 1.5W SMA
- Quantity:
- Payment:
- Shipping:
Inventory:6,577
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Product details
Overview
SZ1SMA5922BT3G from onsemi is a 1.5 W surface-mount Zener diode with nominal reverse breakdown voltage of 7.5 V, maximum zener impedance of 50 Ω at 3.0 mA test current, and leakage current ≤0.5 μA at 6.0 V reverse voltage - used for precision voltage regulation and overvoltage protection in automotive power rails and industrial sensor interfaces.
For engineers reviewing the SZ1SMA5922BT3G datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance (±5%), thermal resistance (250°C/W at TA = 25°C), AEC-Q101 qualification, and SMA package compatibility with automated SMT assembly.
Technical Context
This device operates as a two-terminal voltage reference by maintaining stable reverse conduction above its specified zener voltage (7.12–7.88 V), with dynamic impedance tightly controlled at 50 Ω under 3.0 mA test current. Its low-profile SMA package enables high-density PCB layouts while supporting top-slide or bottom-board mounting configurations.
The SZ1SMA5922BT3G series is AEC-Q101 qualified and PPAP capable, with ESD rating >16 kV per Human Body Model. It features Pb-free construction, UL 94 V-0 flammability rating, and void-free transfer-molded plastic case rated for 260°C soldering at 10 seconds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.12–7.88 V @ IZT = 3.0 mA - defines regulated output voltage range under nominal bias |
| Zener Impedance (ZZT) | 50 Ω max @ IZT = 3.0 mA - ensures minimal voltage deviation during load transients |
| Power Dissipation (PD) | 0.5 W @ TA = 25°C - sets maximum continuous power handling without heatsinking |
| Leakage Current (IR) | ≤0.5 μA @ VR = 6.0 V - guarantees low standby current in undervoltage detection circuits |
| Thermal Resistance (RJA) | 250°C/W - determines junction temperature rise under ambient conditions |
| ESD Rating | Class 3 (>16 kV HBM) - provides robustness against electrostatic discharge in handling and assembly |
| AEC-Q101 Qualified | Yes - validates reliability for automotive electronics applications including engine control and body modules |
Pinout & Package
SMA package (Case 403D, Style 1), surface-mount, low-profile plastic case with molded cathode band. Cathode terminal marked by polarity notch/band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked end) | Reverse-biased Zener terminal | Connected to higher-potential node to enable regulated clamping or reference generation |
| Anode (unmarked end) | Reference/ground return path | Typically tied to system ground or lower-voltage rail for stable bias reference |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables predictable regulation without post-production trimming in cost-sensitive automotive modules |
| Flat handling surface | Improves pick-and-place accuracy during high-speed SMT assembly of engine control units |
| Pb-free and RoHS-compliant | Meets global environmental compliance requirements for Tier 1 automotive suppliers |
| UL 94 V-0 flammability rating | Supports safety-critical placement near high-power components in under-hood electronics |
| Top-slide or bottom-board mount design | Offers layout flexibility for dual-sided PCBs in space-constrained ADAS sensor modules |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating reference voltage for analog-to-digital converters monitoring throttle position and oxygen sensors. IC Role / Device Role / Timing Role: Zener voltage reference providing stable 7.5 V bias for precision ADC front-end circuitry. Use Value: Maintains ±5% regulation across −40°C to +125°C operating range, ensuring consistent sensor measurement accuracy. | Use Scenario: Clamping transient overvoltage on 24 V industrial fieldbus lines exposed to inductive switching noise. IC Role / Device Role / Timing Role: Overvoltage protection device limiting bus voltage spikes to ≤7.88 V during relay coil de-energization. Use Value: 50 Ω dynamic impedance ensures fast response to <100 ns transients without latch-up or degradation. |
| Medical Diagnostic Power Supply | Consumer IoT Battery Management |
Use Scenario: Providing isolated 7.5 V reference for isolated DC-DC feedback loops in portable ultrasound power stages. IC Role / Device Role / Timing Role: Precision voltage reference enabling accurate output regulation in flyback converter feedback networks. Use Value: Low 0.5 μA leakage at 6.0 V prevents drift in high-impedance optocoupler-based feedback paths. | Use Scenario: Protecting lithium-ion battery monitor ICs from ESD events during USB-C hot-plug insertion. IC Role / Device Role / Timing Role: ESD suppression element shunting >16 kV HBM pulses away from sensitive analog inputs. Use Value: Class 3 ESD rating eliminates need for external TVS diodes in compact wearable BMS designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C7V5 | 300 mW rating, SOT-23 package, 7.5 V ±5%, ZZT = 15 Ω @ 5 mA | Lower power handling; unsuitable for sustained 0.5 W dissipation | Select when board space is critical and peak power <300 mW |
| MMSZ5233B | 500 mW rating, SOD-123 package, 7.5 V ±5%, ZZT = 30 Ω @ 20 mA | Higher test current requirement; less stable at low bias currents | Select when tighter ZZT needed but AEC-Q101 not required |
Compared with BZX84-C7V5 and MMSZ5233B, the SZ1SMA5922BT3G delivers higher power capability (1.5 W derated to 0.5 W at 25°C), AEC-Q101 qualification, and superior thermal performance in automotive-grade environments - making it the preferred choice where reliability under temperature cycling and mechanical stress is mandatory.
Availability
SZ1SMA5922BT3G is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor signal conditioning, and medical diagnostic power supplies requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SZ1SMA5922BT3G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The SZ1SMA59xxBT3G series was designed specifically for AEC-Q101-compliant automotive voltage regulation and protection, targeting under-hood and body electronics where high-reliability Zener references are essential.
FAQ
What is the nominal Zener voltage of the SZ1SMA5922BT3G?
The SZ1SMA5922BT3G has a nominal Zener voltage of 7.5 V, with guaranteed minimum and maximum values of 7.12 V and 7.88 V respectively at a test current of 3.0 mA. This ±5% tolerance is confirmed in the onsemi datasheet Electrical Characteristics table and applies across the full operating temperature range of −65°C to +150°C.
Is the SZ1SMA5922BT3G qualified for automotive applications?
Yes, the SZ1SMA5922BT3G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the onsemi datasheet Features section. The "SZ" prefix denotes automotive-grade manufacturing controls, site-specific change management, and extended reliability testing - making SZ1SMA5922BT3G suitable for engine control, body electronics, and ADAS subsystems.
What is the maximum power dissipation of the SZ1SMA5922BT3G at room temperature?
The SZ1SMA5922BT3G has a maximum DC power dissipation of 0.5 W at ambient temperature (TA) = 25°C, with thermal resistance RJA = 250°C/W. Derating begins above 25°C at 4.0 mW/°C, reducing usable power to zero at 150°C ambient - consistent with FR-4 board mounting using onsemi's recommended footprint.
Does the SZ1SMA5922BT3G have ESD protection built-in?
Yes, the SZ1SMA5922BT3G features an ESD rating of Class 3 (>16 kV) per the Human Body Model, as documented in the onsemi datasheet Features section. This level of ESD robustness is inherent to the device structure and packaging - no external protection circuitry is required for standard handling and board-level ESD immunity.
What package type does the SZ1SMA5922BT3G use?
The SZ1SMA5922BT3G uses the SMA (DO-214AC) surface-mount package, also designated Case 403D Style 1 in onsemi documentation. It features a molded cathode band for polarity identification, void-free transfer-molded plastic construction, and UL 94 V-0 flammability rating - optimized for automated placement and reflow soldering.
SZ1SMA5922BT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- SZ1SMA59xxBT3G
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 7.5 V
- Tolerance:
- ±5%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 3 Ohms
- Current - Reverse Leakage @ Vr:
- 2.5 µA @ 6 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
SZ1SMA5922BT3G FAQ
1.How can I place an order for SZ1SMA5922BT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZ1SMA5922BT3G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SZ1SMA5922BT3G reliable?
The price and inventory of SZ1SMA5922BT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZ1SMA5922BT3G is usually 5 days.
3.What payment methods are accepted for SZ1SMA5922BT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZ1SMA5922BT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZ1SMA5922BT3G?
SZ1SMA5922BT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZ1SMA5922BT3G order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SZ1SMA5922BT3G?
For technical support, including SZ1SMA5922BT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZ1SMA5922BT3G requirements.
6.How does Aetrix verify that SZ1SMA5922BT3G is sourced from the original manufacturer or authorized distributors?
All SZ1SMA5922BT3G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SZ1SMA5922BT3G meets industry standards.
7.What is the process for return or replacement of SZ1SMA5922BT3G?
All SZ1SMA5922BT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZ1SMA5922BT3G, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SZ1SMA5922BT3G part is unused and in its original packaging.
Return procedure for SZ1SMA5922BT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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