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onsemi SZBZX84C7V5LT1
- Part No.:
- SZBZX84C7V5LT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C7V5LT1.pdf
- Description:
- DIODE ZENER 7.5V 225MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:33,000
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Product details
Overview
SZBZX84C7V5LT1 from onsemi is a 7.5 V ±5% tolerance Zener diode in SOT-23 package, rated for 225 mW power dissipation at 25°C on FR-5 board, with 15 Ω dynamic impedance at 5 mA test current and 1 μA reverse leakage at 5 V. It serves as a precision voltage reference or overvoltage clamp in low-power portable electronics.
For engineers reviewing the SZBZX84C7V5LT1 datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage (7.5 V), temperature coefficient (+2.5 mV/°C), cathode-anode polarity, SOT-23 footprint compatibility, and AEC-Q101 qualification status for automotive-grade reliability.
Technical Context
This device operates in reverse-biased Zener breakdown mode to maintain stable voltage regulation across load and line variations. Its 15 Ω Zener impedance at 5 mA ensures minimal output voltage deviation under dynamic current conditions.
The +2.5 mV/°C temperature coefficient indicates positive drift with rising junction temperature, requiring thermal design consideration in high-ambient environments. The 140 pF capacitance at 0 V bias supports use in low-frequency stabilization without signal integrity impact.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 7.0–7.9 V @ 5 mA; provides stable 7.5 V reference with ±5% tolerance for supply rail monitoring. |
| Power Dissipation | 225 mW on FR-5 board @ 25°C; limits continuous current to ~30 mA at 7.5 V without derating. |
| Zener Impedance | 15 Ω @ 5 mA; ensures <150 mV output shift for ±2 mA load transients. |
| Reverse Leakage | 1 μA @ 5 V; enables low-quiescent-current bias networks in battery-powered systems. |
| Temperature Coefficient | +2.5 mV/°C @ 5 mA; contributes ~±12.5 mV drift over −40°C to +125°C operating range. |
| Capacitance | 140 pF @ 0 V, 1 MHz; suitable for DC/low-frequency regulation but not RF bypassing. |
| ESD Rating | Class 3 (>16 kV HBM); withstands handling and assembly without external protection. |
Pinout & Package
SOT-23 plastic surface-mount package (Case 318, Style 8), 3-pin, void-free thermosetting mold compound, cathode indicated by band on terminal 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node; reverse-bias current enters here during regulation. |
| 2 | No Connection | Internally unconnected; must remain floating-no PCB trace or pad required. |
| 3 | Cathode | Connected to higher-potential node; Zener voltage referenced to this terminal. |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW FR-5 Power Rating | Enables compact voltage clamping in space-constrained handheld PCBs without heatsinking. |
| AEC-Q101 Qualified | Validated for automotive ambient temperature range (−40°C to +125°C) and reliability stress testing. |
| 16 kV HBM ESD Robustness | Eliminates need for external ESD protection in consumer portables and industrial I/O interfaces. |
| Pb-Free (G-suffix compatible) | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profile requirements. |
| Tight Thermal Resistance | 556 °C/W junction-to-ambient allows >100°C junction rise at full 225 mW dissipation on standard FR-5. |
Applications
| USB Port Overvoltage Protection | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Clamps transient surges on USB VBUS lines to prevent damage to downstream USB controllers. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator, clamping voltage to 7.5 V before TVS activation threshold. Use Value: Provides primary overvoltage defense with 1 μA leakage that avoids loading the 5 V rail during normal operation. |
Use Scenario: Generates clean reset signal for ARM Cortex-M microcontrollers during power-up and brownout events. IC Role / Device Role / Timing Role: Precision voltage reference triggering external reset IC or internal BOR circuitry. Use Value: Delivers stable 7.5 V threshold with +2.5 mV/°C drift, enabling accurate reset assertion across automotive temperature ranges. |
| Cellular Phone Battery Monitoring | Industrial Sensor Signal Conditioning |
Use Scenario: Scales lithium-ion battery voltage for ADC input in smartphone fuel gauges. IC Role / Device Role / Timing Role: Zener-based voltage divider element providing known reference ratio independent of supply variation. Use Value: Maintains ±5% regulation accuracy over 1000+ charge cycles due to low degradation rate in SOT-23 package. |
Use Scenario: Stabilizes excitation voltage for 4–20 mA loop-powered pressure sensors in factory automation. IC Role / Device Role / Timing Role: Shunt regulator maintaining constant 7.5 V bias for sensor bridge circuitry. Use Value: Ensures <0.1% full-scale error contribution from reference drift, meeting IEC 61000-4-5 surge 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 |
|---|---|---|---|
| BZX84C7V5LT1 | Standard tolerance (±5%), non-automotive grade, same SOT-23 package and pinout. | Lacks AEC-Q101 qualification; unsuitable for automotive ECUs or ADAS modules. | Select when cost sensitivity outweighs automotive qualification requirements. |
| SZBZX84B7V5LT1G | Tighter tolerance (±2%), Pb-free, identical thermal and electrical specs except ±1.5% VZ window. | Better suited for precision analog references where 7.35–7.65 V stability is mandatory. | Choose for high-accuracy feedback loops in medical or test equipment where 0.3 V tighter window matters. |
Compared with SZBZX84C7V5LT1, BZX84C7V5LT1 offers identical regulation performance at lower cost but no automotive qualification, while SZBZX84B7V5LT1G trades wider voltage tolerance for ±2% precision-critical in closed-loop control but unnecessary for basic overvoltage clamping.
Availability
SZBZX84C7V5LT1 is available at Aetrix Electronics and suitable for USB protection circuits, microcontroller reset subsystems, battery fuel gauging, and industrial 4–20 mA sensor interfaces requiring stable component supply and long-term lifecycle support.
Supply support for SZBZX84C7V5LT1 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
SZBZX84C7V5LT1 belongs to the BZX84CxxxLT1 family of Zener regulators designed specifically for high-density, low-power portable electronics and automotive body electronics where small size, reliability, and AEC-Q101 compliance are essential.
FAQ
What is the maximum continuous Zener current for SZBZX84C7V5LT1 at 25°C?
The SZBZX84C7V5LT1 has a 225 mW power rating on FR-5 board at 25°C. At its nominal 7.5 V Zener voltage, this corresponds to a maximum continuous current of 30 mA (225 mW ÷ 7.5 V). Derating begins above 25°C at 1.8 mW/°C, reducing usable current in elevated ambient conditions. Exceeding this limit risks thermal runaway and permanent parametric shift.
Does SZBZX84C7V5LT1 have a built-in capacitor or require external filtering?
SZBZX84C7V5LT1 does not integrate any capacitor; it is a discrete two-terminal Zener diode. Its 140 pF junction capacitance is inherent to the silicon structure and sufficient for DC and low-frequency (<100 kHz) regulation. For high-noise environments or fast transients, designers typically add a 100 nF ceramic capacitor in parallel to improve dynamic response-this is external, not built-in.
Is SZBZX84C7V5LT1 pin-compatible with other SOT-23 Zener diodes?
Yes-SZBZX84C7V5LT1 uses standard SOT-23 pinout: Pin 1 = Anode, Pin 2 = No Connection, Pin 3 = Cathode. This matches industry-standard SOT-23 Zener footprints including BZX84, MMBZ52, and NSZ series. PCB layout remains unchanged when substituting within the same package variant, provided thermal and electrical margins are verified.
What does the "SZ" prefix signify in SZBZX84C7V5LT1?
The "SZ" prefix in SZBZX84C7V5LT1 denotes compliance with automotive-grade requirements, including AEC-Q101 qualification, PPAP capability, and controlled manufacturing site/process changes. It distinguishes this part from commercial-grade BZX84C7V5LT1 variants and confirms suitability for automotive body electronics, infotainment power rails, and ADAS subsystems where reliability under extended temperature and vibration stress is mandatory.
Can SZBZX84C7V5LT1 be used in place of a 7.5 V linear regulator?
No-SZBZX84C7V5LT1 is a shunt regulator, not a series regulator. It requires a current-limiting resistor and sinks excess current to ground, making it inefficient for high-current loads. Unlike a 7.5 V LDO, it cannot source load current directly. Use SZBZX84C7V5LT1 only for low-power reference, clamping, or biasing; for >10 mA loads, a dedicated 7.5 V LDO or switching regulator is required.
SZBZX84C7V5LT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 7.5 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 5 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
SZBZX84C7V5LT1 FAQ
1.How can I place an order for SZBZX84C7V5LT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C7V5LT1 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 SZBZX84C7V5LT1 reliable?
The price and inventory of SZBZX84C7V5LT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C7V5LT1 is usually 5 days.
3.What payment methods are accepted for SZBZX84C7V5LT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C7V5LT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C7V5LT1?
SZBZX84C7V5LT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C7V5LT1 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 SZBZX84C7V5LT1?
For technical support, including SZBZX84C7V5LT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C7V5LT1 requirements.
6.How does Aetrix verify that SZBZX84C7V5LT1 is sourced from the original manufacturer or authorized distributors?
All SZBZX84C7V5LT1 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 SZBZX84C7V5LT1 meets industry standards.
7.What is the process for return or replacement of SZBZX84C7V5LT1?
All SZBZX84C7V5LT1 units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C7V5LT1, 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 SZBZX84C7V5LT1 part is unused and in its original packaging.
Return procedure for SZBZX84C7V5LT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C7V5LT1 Tags
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MM5Z5V1ST1G
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