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onsemi SZ1SMA5923BT3G
- Part No.:
- SZ1SMA5923BT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SZ1SMA5923BT3G.pdf
- Description:
- DIODE ZENER 8.2V 1.5W SMA
- Quantity:
- Payment:
- Shipping:
Inventory:3,999
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Product details
Overview
SZ1SMA5923BT3G from onsemi is a 1.5 W surface-mount Zener diode with nominal reverse breakdown voltage of 8.2 V, maximum zener impedance of 45.7 Ω at 3.5 mA test current, and leakage current ≤0.5 μA at 6.5 V reverse voltage - used for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the SZ1SMA5923BT3G datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance (±5%), thermal resistance (250 °C/W junction-to-ambient), AEC-Q101 qualification status, and SMA package compatibility with automated SMT placement.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse bias above its specified zener voltage (7.79–8.61 V) while maintaining stable regulation across a DC zener current range of 0.5 to 183 mA. Its low-profile SMA package supports top-slide or bottom-board mounting and features a flat handling surface for accurate pick-and-place alignment.
The SZ1SMA5923BT3G series is AEC-Q101 qualified and Pb-free, with ESD rating >16 kV per Human Body Model. It exhibits a temperature coefficient of approximately +3.5 mV/°C near 8.2 V, and its zener impedance drops with increasing test current - 45.7 Ω at IZT = 3.5 mA and 400 Ω at IZK = 0.5 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.79–8.61 V @ IZT = 3.5 mA - defines regulated output voltage window under nominal bias |
| Power Dissipation (PD) | 0.5 W @ TA = 25°C - limits continuous operation without forced cooling or PCB copper area |
| Zener Impedance (ZZT) | 45.7 Ω max @ IZT = 3.5 mA - determines AC ripple rejection and load regulation sensitivity |
| Leakage Current (IR) | ≤0.5 μA @ VR = 6.5 V - ensures minimal standby power loss in high-impedance bias networks |
| Thermal Resistance (RJA) | 250 °C/W - requires ≥1 in² FR-4 copper pad to sustain full 0.5 W at ambient 25°C |
| ESD Rating | Class 3 (>16 kV HBM) - enables robust handling in unshielded assembly environments |
| Operating Temp Range | −65°C to +150°C - supports automotive under-hood and industrial control applications |
Pinout & Package
Package: SMA (Case 403D), surface-mount, cathode-indicated by molded band. Dimensions: 4.5 × 2.7 × 2.1 mm (L × W × H). RoHS-compliant, Pb-free, UL 94 V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Band End) | Reverse-bias anode connection point | Connected to higher-potential node in shunt regulator configuration; polarity critical for correct conduction |
| Anode (Opposite End) | Reverse-bias cathode return path | Typically tied to system ground or low-side reference; completes current path during zener breakdown |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock |
| Low-Profile SMA Package | Enables high-density PCB layouts and compatibility with standard SMT reflow profiles (260°C/10 s max) |
| Flat Handling Surface | Improves placement accuracy and reduces tombstoning risk during automated pick-and-place assembly |
| ESD Robustness | Withstands >16 kV HBM - eliminates need for external ESD protection in many board-level designs |
| Pb-Free Construction | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level MSL 1 |
Applications
| Automotive Power Supply Regulation | Industrial Sensor Reference Voltage |
|---|---|
Use Scenario: Regulating 8.2 V reference in engine control unit (ECU) 5 V LDO feedback divider network. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable setpoint for error amplifier comparison. Use Value: Maintains ±5% regulation over −40°C to +125°C ambient, supporting AEC-Q100 Grade 1 compliance. | Use Scenario: Biasing precision op-amp input stage in 4–20 mA transmitter loop-powered sensor. IC Role / Device Role / Timing Role: Low-leakage voltage clamp establishing common-mode reference for analog signal conditioning. Use Value: 0.5 μA max leakage at 6.5 V ensures <100 nA error contribution to microamp-level loop current. |
| Consumer Adapter Overvoltage Protection | Medical Diagnostic Equipment Clamp |
Use Scenario: Clamping transient surges on USB-C PD adapter secondary-side 9 V rail. IC Role / Device Role / Timing Role: Fast-response shunt protector limiting voltage excursions beyond safe operating range. Use Value: 45.7 Ω dynamic impedance minimizes clamping overshoot during 10/1000 μs surge events. | Use Scenario: Protecting ADC input of portable ultrasound front-end from ESD-induced latch-up. IC Role / Device Role / Timing Role: Low-capacitance (<5 pF) voltage limiter preserving signal integrity up to 1 MHz. Use Value: Class 3 HBM rating (>16 kV) meets IEC 61000-4-2 Level 4 immunity requirements. |
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-C8V2LT1G | 0.3 W rating, SOT-23 package, 8.2 V ±5%, ZZT = 40 Ω @ 5 mA | Lower power handling; suitable only for signal-level biasing, not power regulation | Select when board space is constrained and dissipation remains <300 mW |
| MMSZ5231BT1G | 0.5 W rating, SOD-123 package, 8.2 V ±5%, ZZT = 30 Ω @ 20 mA | Higher test current requirement; better regulation at higher loads but lower surge capability | Select when tighter voltage regulation at >10 mA is prioritized over transient energy absorption |
Compared with BZX84-C8V2LT1G and MMSZ5231BT1G, the SZ1SMA5923BT3G delivers higher power handling (0.5 W vs. 0.3 W), superior surge robustness due to larger die and SMA thermal mass, and AEC-Q101 qualification - making it preferred for automotive and industrial power regulation where reliability under thermal stress is critical.
Availability
SZ1SMA5923BT3G is available at Aetrix Electronics and suitable for automotive power management, industrial sensor signal conditioning, and medical diagnostic equipment requiring stable component supply with long-term lifecycle support.
Supply support for SZ1SMA5923BT3G 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 - focused on enabling sustainable technology.
The SZ1SMA59xxBT3G series is part of onsemi's automotive-qualified discrete portfolio, designed specifically for voltage regulation and transient suppression in harsh-environment electronic control units and safety-critical subsystems.
FAQ
What is the zener voltage tolerance for SZ1SMA5923BT3G?
The SZ1SMA5923BT3G has a zener voltage tolerance of ±5%, with minimum, nominal, and maximum values of 7.79 V, 8.2 V, and 8.61 V respectively, measured at IZT = 3.5 mA and thermal equilibrium. This tolerance is guaranteed per the device marking designation and applies across the full operating temperature range of −65°C to +150°C. The SZ1SMA5923BT3G datasheet specifies these limits in the Electrical Characteristics table on page 2.
Is SZ1SMA5923BT3G suitable for automotive applications?
Yes, SZ1SMA5923BT3G is AEC-Q101 qualified and PPAP capable, with explicit automotive qualification noted in the datasheet's Features section. Its construction includes Pb-free materials, ESD robustness >16 kV HBM, and operation over −65°C to +150°C - meeting requirements for engine control, body electronics, and ADAS subsystems. The "SZ" prefix denotes automotive-specific site and change control, confirming its suitability for automotive use cases.
What is the maximum DC zener current for SZ1SMA5923BT3G?
The maximum DC zener current (IZM) for SZ1SMA5923BT3G is 183 mA, calculated from PD = 0.5 W and VZ = 8.2 V (IZM = PD/VZ). This value is confirmed in the Electrical Characteristics table on page 2 of the datasheet. Operation above this current risks thermal runaway unless derated per the power derating curve in Figure 1, especially above 25°C ambient temperature.
Does SZ1SMA5923BT3G have a defined thermal resistance junction-to-lead?
Yes, SZ1SMA5923BT3G has a thermal resistance of RJL = 50 °C/W junction-to-lead, specified in the Maximum Ratings table on page 1 of the datasheet. This parameter assumes zero lead length and is measured with a 1 in² copper pad on FR-4 board. It enables thermal modeling of solder-joint temperature rise under steady-state conditions and supports layout decisions involving thermal vias and copper pour design.
How is polarity identified on the SZ1SMA5923BT3G package?
Polarity on the SZ1SMA5923BT3G is indicated by a molded cathode band at one end of the SMA package, consistent with Case 403D Style 1. The cathode terminal must be connected to the higher-potential node in shunt regulator configurations. This marking is visible under standard optical inspection and aligns with the pinout diagram on page 4 of the datasheet, where Pin 1 is labeled "Cathode (Polarity Band)".
SZ1SMA5923BT3G 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):
- 8.2 V
- Tolerance:
- ±5%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 3.5 Ohms
- Current - Reverse Leakage @ Vr:
- 2.5 µA @ 6.5 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
SZ1SMA5923BT3G FAQ
1.How can I place an order for SZ1SMA5923BT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZ1SMA5923BT3G 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 SZ1SMA5923BT3G reliable?
The price and inventory of SZ1SMA5923BT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZ1SMA5923BT3G is usually 5 days.
3.What payment methods are accepted for SZ1SMA5923BT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZ1SMA5923BT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZ1SMA5923BT3G?
SZ1SMA5923BT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZ1SMA5923BT3G 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 SZ1SMA5923BT3G?
For technical support, including SZ1SMA5923BT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZ1SMA5923BT3G requirements.
6.How does Aetrix verify that SZ1SMA5923BT3G is sourced from the original manufacturer or authorized distributors?
All SZ1SMA5923BT3G 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 SZ1SMA5923BT3G meets industry standards.
7.What is the process for return or replacement of SZ1SMA5923BT3G?
All SZ1SMA5923BT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZ1SMA5923BT3G, 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 SZ1SMA5923BT3G part is unused and in its original packaging.
Return procedure for SZ1SMA5923BT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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