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Nexperia USA Inc. SZMM3Z22VT1GX
- Part No.:
- SZMM3Z22VT1GX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SZMM3Z22VT1GX.pdf
- Description:
- DIODE ZENER 22V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:26,834
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Product details
Overview
SZMM3Z22VT1GX from Nexperia is a Zener voltage regulator diode in SOD323 (SC-76) package, rated for 22 V nominal Zener voltage (20.88–23.17 V), 300 mW total power dissipation, and ±5 % tolerance. It delivers low differential resistance (≤17 Ω at IZ = 5 mA), AEC-Q101 qualification, and stable regulation in automotive sensor biasing and power rail clamping circuits.
For engineers reviewing the SZMM3Z22VT1GX datasheet, SZMM3Z22VT1GX pinout, SZMM3Z22VT1GX application, or SZMM3Z22VT1GX equivalent, this page provides verified electrical characteristics, thermal behavior, cathode/anode terminal mapping, and automotive-grade reliability context - all confirmed from Nexperia's Rev. 5 product data sheet dated 16 January 2025.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable reference voltage under varying load and temperature conditions. Its 22 V nominal working voltage is specified at IZ = 5 mA, with a temperature coefficient of +16.4 to +20.0 mV/K and reverse current ≤100 µA at VR = 17.6 V.
Thermal performance is defined by Rth(j-a) = 415 K/W (free air) and Rth(j-sp) = 110 K/W (solder point), enabling reliable operation up to Tj = 150 °C. The device supports non-repetitive surge handling up to 40 W (tp = 100 µs, square wave).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20.88 V to 23.17 V at IZ = 5 mA - defines precise regulation window for 22 V rail stabilization |
| Differential Resistance (rdiff) | ≤17 Ω at IZ = 5 mA - ensures minimal output voltage shift under load variation |
| Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C - sets maximum continuous DC power limit on standard FR4 PCB |
| Reverse Current (IR) | ≤100 µA at VR = 17.6 V - guarantees low leakage before breakdown onset |
| Forward Voltage (VF) | 1.1 V at IF = 100 mA - defines conduction loss during forward-biased transient events |
| Temperature Coefficient (SZ) | +16.4 to +20.0 mV/K - quantifies positive VZ drift per degree Celsius rise in junction temperature |
| Junction Temperature (Tj) | −55 °C to +150 °C - confirms suitability for under-hood automotive environments |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic package with 2 leads; dimensions 1.8 mm × 1.35 mm × 0.95 mm; marking bar denotes cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode (A) | Connected to ground or lower-potential reference; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics |
| Low differential resistance | ≤17 Ω enables tight voltage regulation under dynamic load changes |
| Wide voltage range coverage | 22 V nominal point within 2.4–75 V series supports scalable BOM consolidation |
| Non-repetitive surge capability | 40 W peak reverse power (100 µs square wave) protects against ESD and load dump transients |
| Small-footprint SOD323 package | 0.95 mm height and 1.35 mm length enable high-density layout in space-constrained modules |
Applications
| Automotive Sensor Biasing | Industrial Power Rail Clamping |
|---|---|
|
Use Scenario: Providing stable 22 V reference to analog front-end circuitry in ABS wheel speed sensors. IC Role / Device Role / Timing Role: Zener diode acts as precision shunt regulator, maintaining constant bias voltage despite battery fluctuations (9–16 V) and load transients. Use Value: Ensures sensor signal integrity across −40 °C to +125 °C ambient, supported by AEC-Q101 qualification and +16.4 mV/K temperature coefficient. |
Use Scenario: Clamping overvoltage spikes on 24 V industrial PLC I/O lines exposed to inductive switching noise. IC Role / Device Role / Timing Role: Shunt protection device that conducts excess energy above 22 V threshold into ground, limiting downstream IC stress. Use Value: Withstands 40 W non-repetitive surges (100 µs), preventing latch-up or damage to 24 V interface ICs without requiring external TVS coordination. |
| Consumer USB-C PD Adapter Feedback | Medical Instrument Reference Stability |
|
Use Scenario: Voltage reference in optocoupler feedback loop of 22 V auxiliary rail in multi-output USB-C power adapter. IC Role / Device Role / Timing Role: Sets accurate secondary-side regulation point; interfaces with TL431 or similar error amplifier via resistive divider. Use Value: ±5 % tolerance and low rdiff (≤17 Ω) minimize output voltage drift across line/load/temperature, meeting USB PD v3.1 ripple requirements. |
Use Scenario: Stabilizing bias voltage for low-noise instrumentation amplifiers in portable ECG monitors. IC Role / Device Role / Timing Role: Provides clean, low-drift 22 V supply for op-amp dual-rail operation in analog signal chain. Use Value: Junction temperature rating up to 150 °C and 300 mW dissipation allow integration near heat-generating ADCs without thermal derating concerns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B22,115 | Same 22 V nominal, SOD323 package, but ±5 % tolerance and higher rdiff (≤20 Ω); no AEC-Q101 claim | Limited to commercial-grade consumer power supplies; not validated for automotive temperature cycling or humidity testing | Select when cost sensitivity outweighs automotive qualification and tighter rdiff is acceptable |
| MMSZ5247B-TP | 22 V nominal, SOD-123 package (larger footprint), ±5 % tolerance, rdiff ≤25 Ω, no AEC-Q101 status | Requires PCB redesign due to 2.7 mm × 1.6 mm outline; unsuitable for ultra-compact modules | Choose only if existing SOD-123 layout prevents SOD323 adoption and AEC-Q101 is not required |
Compared with BZX384-B22,115 and MMSZ5247B-TP, SZMM3Z22VT1GX offers superior thermal resistance (Rth(j-sp) = 110 K/W), automotive qualification, and lower differential resistance - making it the preferred choice for space-constrained, high-reliability 22 V regulation in automotive and industrial systems.
Availability
SZMM3Z22VT1GX is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial power rail clamping, USB-C PD adapter feedback, and medical instrument reference stability requiring stable component supply and long-term lifecycle support.
Supply support for SZMM3Z22VT1GX 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.
SZMM3Z22VT1GX belongs to the SZMM3Z series of general-purpose Zener diodes designed specifically for compact, AEC-Q101-compliant voltage regulation in automotive and industrial power management systems.
FAQ
What is the maximum continuous reverse current this Zener can handle at 22 V?
The device is rated for a maximum continuous reverse current of 13.6 mA at 22 V, derived from Ptot = 300 mW ÷ VZ = 300 mW ÷ 22 V ≈ 13.6 mA. This assumes Tamb = 25 °C on standard FR4 PCB; derating applies above 25 °C per Rth(j-a) = 415 K/W.
Is the cathode marked on the physical package?
Yes - the cathode (pin 1) is identified by a visible marking bar on the top surface of the SOD323 package. This aligns with Table 2 (Pinning information) and Figure 11 (Package outline) in the Nexperia datasheet Rev. 5.
Can this Zener be used in parallel for higher power dissipation?
No - Zener diodes exhibit manufacturing variations in VZ, causing current imbalance and thermal runaway when paralleled. The datasheet does not recommend or characterize parallel operation; use a single higher-power device or active regulation instead.
Does the AEC-Q101 qualification cover solder reflow profile compliance?
Yes - AEC-Q101 qualification includes robustness testing across JEDEC J-STD-020 moisture sensitivity and reflow profiles. The SOD323 package is qualified for standard lead-free reflow (peak 260 °C), as confirmed in Nexperia's soldering guidelines (Fig. 12, Reflow footprint).
SZMM3Z22VT1GX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 22 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 17 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
SZMM3Z22VT1GX FAQ
1.How can I place an order for SZMM3Z22VT1GX through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM3Z22VT1GX 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 SZMM3Z22VT1GX reliable?
The price and inventory of SZMM3Z22VT1GX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM3Z22VT1GX is usually 5 days.
3.What payment methods are accepted for SZMM3Z22VT1GX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM3Z22VT1GX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM3Z22VT1GX?
SZMM3Z22VT1GX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM3Z22VT1GX 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 SZMM3Z22VT1GX?
For technical support, including SZMM3Z22VT1GX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM3Z22VT1GX requirements.
6.How does Aetrix verify that SZMM3Z22VT1GX is sourced from the original manufacturer or authorized distributors?
All SZMM3Z22VT1GX 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 SZMM3Z22VT1GX meets industry standards.
7.What is the process for return or replacement of SZMM3Z22VT1GX?
All SZMM3Z22VT1GX units undergo pre-shipment inspection (PSI). If there is an issue with SZMM3Z22VT1GX, 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 SZMM3Z22VT1GX part is unused and in its original packaging.
Return procedure for SZMM3Z22VT1GX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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