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onsemi SZBZX84C22LT1
- Part No.:
- SZBZX84C22LT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C22LT1.pdf
- Description:
- DIODE ZENER 22V 225MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:18,000
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Product details
Overview
SZBZX84C22LT1 from onsemi is a 22 V, ±5% tolerance Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board at 25°C, with 55 Ω dynamic impedance at 5 mA test current and 15.4 mV/°C temperature coefficient - used for precision voltage reference and overvoltage protection in portable power rails.
For engineers reviewing the SZBZX84C22LT1 datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal coefficient (15.4 mV/°C), leakage current (≤50 nA at 17.6 V), SOT-23 footprint compatibility, and AEC-Q101 qualification status for automotive-grade designs.
Technical Context
This device operates as a two-terminal voltage regulator via controlled reverse breakdown, with nominal Zener voltage of 22 V specified at 5 mA test current (IZT). Its 55 Ω dynamic impedance (ZZT) ensures stable regulation under moderate load transients, while the 15.4 mV/°C temperature coefficient defines predictable drift across −65°C to +150°C junction range.
The SOT-23 package supports automated placement and reflow soldering per JEDEC standards, with cathode indicated by band marking and pinout defined as Pin 1 = Anode, Pin 2 = No Connection, Pin 3 = Cathode. ESD rating exceeds 16 kV (HBM Class 3), supporting robust handling in high-volume assembly environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 22 V nominal, 20.8–23.3 V min/max at 5 mA - sets precise clamping threshold for 3.3 V/5 V/12 V rail protection |
| Power Rating | 225 mW on FR-5 board at 25°C - limits continuous dissipation in space-constrained PCBs |
| Zener Impedance | 55 Ω max at 5 mA - determines output voltage stability under varying load currents |
| Temp Coefficient | +15.4 mV/°C - quantifies voltage drift per degree, critical for temperature-sensitive references |
| Leakage Current | ≤50 nA at VR = 17.6 V - ensures minimal quiescent current in battery-powered standby modes |
| Capacitance | 85 pF at VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering capability |
| ESD Rating | Class 3 (>16 kV HBM) - enables direct integration into handheld ESD-prone interfaces |
Pinout & Package
SOT-23 (Case 318-08) surface-mount plastic package with void-free thermosetting molding, corrosion-resistant finish, and UL 94 V-0 flammability rating. Maximum soldering temperature: 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node in reverse-bias configuration; carries forward current during non-regulating operation |
| Pin 2 | No Connection | Internally unconnected; must remain floating - no PCB trace or pad required |
| Pin 3 | Cathode | Connected to higher-potential node; marked by polarity band; sinks regulated current during Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including engine control modules and ADAS power supervision |
| Pb-Free Packaging | RoHS-compliant SOT-23 construction with lead-free terminations suitable for modern reflow profiles |
| Tight Thermal Stability | 15.4 mV/°C TC enables <±2% voltage shift over −40°C to +125°C ambient range |
| High-Density Footprint | 2.9 mm × 1.3 mm SOT-23 outline allows placement in <3 mm² board area for compact DC-DC feedback networks |
| ESD Robustness | Class 3 HBM rating (>16 kV) eliminates need for external transient suppressors in USB/IO port protection |
Applications
| Cellular Phone Power Management | Automotive Body Control Module |
|---|---|
Use Scenario: Clamping 5 V USB charging rail against surge events during hot-plug insertion. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing passive overvoltage protection without control logic. Use Value: Limits peak voltage to ≤23.3 V using 22 V ±5% tolerance, preventing damage to PMIC input stages. | Use Scenario: Stabilizing 12 V microcontroller supply in door module under load dump conditions. IC Role / Device Role / Timing Role: Zener reference element in discrete LDO feedback divider network. Use Value: Maintains ±1% reference accuracy over temperature due to low 15.4 mV/°C TC and 55 Ω ZZT. |
| Industrial Sensor Transmitter | Medical Portable Monitor |
Use Scenario: Providing stable 22 V bias for analog front-end op-amps in 4–20 mA loop-powered sensors. IC Role / Device Role / Timing Role: Precision voltage reference source for DAC output scaling. Use Value: Delivers 22 V ±0.23 V tolerance at 5 mA, enabling 12-bit linearity in sensor signal conditioning. | Use Scenario: Protecting lithium-ion battery monitor IC inputs during charger fault conditions. IC Role / Device Role / Timing Role: Low-leakage (≤50 nA) clamp limiting voltage to safe levels during standby. Use Value: Draws <50 nA at 17.6 V reverse bias, preserving battery life over multi-year device deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C22LT1 | Same electrical specs but lacks SZ prefix; not AEC-Q101 qualified or automotive PPAP capable | Restricted to commercial-grade consumer electronics; unsuitable for automotive OEM programs | Select only for cost-sensitive non-automotive designs where AEC-Q101 compliance is unnecessary |
| SZBZX84C22LT1G | Identical electrical and mechanical specs; "G" suffix denotes Pb-free variant with same SOT-23 footprint | No functional difference; fully interchangeable in RoHS-compliant manufacturing lines | Preferred for new designs requiring lead-free compliance and full traceability documentation |
Compared with SZBZX84C22LT1, BZX84C22LT1 omits automotive qualification and PPAP support, while SZBZX84C22LT1G provides identical performance in a Pb-free package - making the latter optimal for future-proof, environmentally compliant deployments.
Availability
SZBZX84C22LT1 is available at Aetrix Electronics and suitable for cellular phone power management, automotive body control modules, and industrial sensor transmitters requiring stable component supply with AEC-Q101 validation and long-term lifecycle support.
Supply support for SZBZX84C22LT1 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 delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
SZBZX84CxxxLT1G series belongs to onsemi's automotive-qualified Zener regulator product line, designed specifically for voltage reference, overvoltage protection, and power rail stabilization in harsh-environment electronic control units.
FAQ
What is the Zener voltage tolerance of SZBZX84C22LT1?
The SZBZX84C22LT1 has a Zener voltage tolerance of ±5%, with a nominal value of 22 V and guaranteed range of 20.8 V to 23.3 V at 5 mA test current (IZT). This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official datasheet and applies strictly to the SZBZX84C22LT1 variant within the BZX84CxxxLT1 family.
Is SZBZX84C22LT1 qualified for automotive use?
Yes, SZBZX84C22LT1 is AEC-Q101 qualified and PPAP capable, as explicitly stated in the Features section of the datasheet. The "SZ" prefix denotes automotive and other applications requiring unique site and control change requirements, distinguishing it from commercial-grade BZX84C22LT1 variants.
What is the pin configuration of SZBZX84C22LT1?
SZBZX84C22LT1 uses a standard SOT-23 pinout: Pin 1 = Anode, Pin 2 = No Connection (internally unconnected), Pin 3 = Cathode (marked by polarity band). This configuration is documented in both the Marking Diagram and Electrical Characteristics sections of the datasheet for all BZX84CxxxLT1-series devices.
Does SZBZX84C22LT1 have Pb-free packaging?
The SZBZX84C22LT1 part number itself does not include the "G" suffix, but the datasheet confirms that Pb-free packages are available for this series under the SZBZX84C22LT1G designation. Both versions share identical electrical and thermal specifications, with the "G" indicating RoHS-compliant lead-free terminations and packaging.
What is the maximum power dissipation of SZBZX84C22LT1 on FR-5 board?
SZBZX84C22LT1 is rated for 225 mW total power dissipation on FR-5 board at TA = 25°C, derating linearly by 1.8 mW/°C above that temperature. This rating is specified in the Maximum Ratings table and validated for standard 1.0 × 0.75 × 0.62 inch FR-5 test board geometry per note 1 in the datasheet.
SZBZX84C22LT1 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):
- 22 V
- Tolerance:
- ±6%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 15.4 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)
SZBZX84C22LT1 FAQ
1.How can I place an order for SZBZX84C22LT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C22LT1 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 SZBZX84C22LT1 reliable?
The price and inventory of SZBZX84C22LT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C22LT1 is usually 5 days.
3.What payment methods are accepted for SZBZX84C22LT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C22LT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C22LT1?
SZBZX84C22LT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C22LT1 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 SZBZX84C22LT1?
For technical support, including SZBZX84C22LT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C22LT1 requirements.
6.How does Aetrix verify that SZBZX84C22LT1 is sourced from the original manufacturer or authorized distributors?
All SZBZX84C22LT1 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 SZBZX84C22LT1 meets industry standards.
7.What is the process for return or replacement of SZBZX84C22LT1?
All SZBZX84C22LT1 units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C22LT1, 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 SZBZX84C22LT1 part is unused and in its original packaging.
Return procedure for SZBZX84C22LT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C22LT1 Tags
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