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Nexperia USA Inc. SZMM5Z20VT5GF
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- Part No.:
- SZMM5Z20VT5GF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
SZMM5Z20VT5GF.pdf
- Description:
- DIODE ZENER 20V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
SZMM5Z20VT5GF from Nexperia is a 20 V ±2 % tolerance Zener diode in SOD523 (SC-79) package, rated for 300 mW total power dissipation and 40 W non-repetitive peak reverse power, with 19.6–20.4 V nominal Zener voltage at IZ = 5 mA, 14.0 Ω differential resistance, and AEC-Q101 qualification for automotive voltage regulation.
For engineers reviewing the SZMM5Z20VT5GF datasheet, SZMM5Z20VT5GF pinout, SZMM5Z20VT5GF application, or SZMM5Z20VT5GF equivalent, this device serves as a precision shunt regulator in low-power biasing, overvoltage clamping, and reference voltage generation where ultra-small footprint, thermal stability, and automotive-grade reliability are required.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. It exhibits a temperature coefficient of +14.4 to +18.0 mV/K at IZ = 5 mA and achieves low dynamic impedance (14.0 Ω) for tight regulation in feedback paths.
Designed for surface-mount use on FR4 PCBs with ~35 mm² copper area at the cathode tab, it delivers Rth(j-a) = 350 K/W in free air and Rth(j-sp) = 65 K/W to solder point-enabling reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 19.6 V to 20.4 V at IZ = 5 mA - defines precise clamping threshold for 20 V nominal systems |
| Tolerance | ±2 % - ensures tight voltage matching without post-production trimming |
| Differential Resistance (rdiff) | 14.0 Ω - minimizes output voltage variation under load current changes |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C - supports continuous regulation in space-constrained PCB layouts |
| Non-repetitive Peak Reverse Power | 40 W (tp = 100 µs) - provides transient surge immunity against ESD and load dump events |
| Reverse Current (IR) | ≤ 55 µA at VR = 15 V - ensures low leakage in high-impedance reference nodes |
| Thermal Resistance (j–sp) | 65 K/W - enables efficient heat transfer from junction to PCB solder point for thermal reliability |
Pinout & Package
The SZMM5Z20VT5GF is housed in an ultra-compact SOD523 (SC-79) plastic surface-mount package with two leads and a cathode marking bar. Its dimensions are 1.25 mm × 0.85 mm × 0.65 mm (L × W × H), optimized for high-density routing and automated placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marked by visible bar; carries reverse-biased current during Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for voltage reference function |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics per stress test standard |
| ±2 % voltage tolerance | Eliminates need for external calibration in precision reference circuits |
| Low 14.0 Ω differential resistance | Reduces output voltage drift under ±1 mA load variation in feedback networks |
| SOD523 ultra-small footprint | Enables placement in <1.1 mm² board area-critical for wearables and compact ECUs |
| 150 °C maximum junction temperature | Supports operation in under-hood environments without derating below ambient +105 °C |
Applications
| Automotive Sensor Biasing | USB Port Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 20 V bias to analog front-end circuitry in engine knock sensors and exhaust gas oxygen sensors. IC Role / Device Role / Timing Role: Shunt voltage regulator maintaining fixed reference potential despite battery voltage fluctuations (9–16 V) and ripple. Use Value: Ensures sensor signal integrity by holding bias within ±2 % across temperature (−40 to +125 °C) and life cycle. |
Use Scenario: Clamping transient surges on USB VBUS lines during hot-plug events or ESD discharge. IC Role / Device Role / Timing Role: Fast-acting Zener clamp diverting >40 W surge energy away from downstream USB controller ICs. Use Value: Prevents latch-up or damage to USB PHYs by limiting VBUS to ≤20.4 V for <100 µs pulses per IEC 61000-4-2 Level 4. |
| Industrial PLC Input Protection | Medical Instrument Reference Source |
Use Scenario: Protecting 24 V DC digital input channels in programmable logic controllers from field-wiring transients. IC Role / Device Role / Timing Role: Standby shunt regulator absorbing induced spikes while presenting <55 µA leakage in normal operation. Use Value: Maintains input logic threshold accuracy and extends channel lifetime by limiting voltage excursions to 20.4 V max. |
Use Scenario: Generating a stable 20 V reference for ADC driver stages in portable ultrasound and ECG devices. IC Role / Device Role / Timing Role: Precision voltage reference element in ratiometric measurement chains requiring low drift and noise. Use Value: Delivers <14.0 Ω dynamic impedance and +14.4 mV/K tempco-enabling <0.1 % full-scale error over 0–50 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C20 | Same 20 V nominal, ±2 %, but SOD323 package (1.7 × 1.3 mm); higher Ptot = 500 mW; no AEC-Q101 rating | Preferred for industrial non-automotive designs needing higher power margin and larger handling | Select when board space allows larger footprint and automotive qualification is not required |
| MMSZ5249B | 20 V nominal, ±5 % tolerance; SOD123 package (3.7 × 1.6 mm); Ptot = 500 mW; no AEC-Q101 | Suitable for cost-sensitive consumer power supplies where ±5 % regulation is acceptable | Choose only if tighter tolerance and automotive compliance are unnecessary |
Compared with BZX584C20 and MMSZ5249B, SZMM5Z20VT5GF offers the smallest footprint (SOD523), guaranteed ±2 % tolerance, and AEC-Q101 qualification-making it uniquely suited for space-constrained automotive and medical applications demanding precision and reliability.
Availability
SZMM5Z20VT5GF is available at Aetrix Electronics and suitable for automotive sensor biasing, USB port protection, and industrial PLC input conditioning requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SZMM5Z20VT5GF 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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and automotive-grade quality.
SZMM5Z20VT5GF belongs to the SZMM5Z series of AEC-Q101-qualified Zener diodes engineered for precision voltage regulation in automotive, industrial, and medical systems where ultra-small size and tight tolerance are critical.
FAQ
What is the maximum continuous reverse current this Zener can handle at 20 V?
The SZMM5Z20VT5GF is rated for 300 mW total power dissipation at 25 °C ambient. At 20 V Zener voltage, this corresponds to a maximum continuous reverse current of 15 mA (300 mW ÷ 20 V). Derating applies above 25 °C per the thermal resistance curve in the datasheet.
Does the cathode marking align with industry-standard polarity conventions?
Yes-the marking bar on the SZMM5Z20VT5GF package identifies Pin 1 as the cathode, consistent with JEDEC SC-79 and IEC 60747-2 standards. This matches the graphic symbol in Figure 9 and Table 2, confirming conventional Zener polarity for PCB layout and schematic capture.
Can this Zener be used in parallel for higher power handling?
No-parallel connection of Zener diodes is not recommended due to mismatch in Zener voltage and temperature coefficient, which causes current hogging and thermal runaway. For higher power, use a single higher-rated device or add active current-sharing circuitry.
Is the 40 W non-repetitive peak rating applicable to both unidirectional and bidirectional transients?
The 40 W rating applies only to unidirectional reverse-biased surges (e.g., positive-going transients on cathode), as defined in Table 1 and Table 5. Forward conduction is limited to 200 mA continuous and does not support equivalent surge capability in forward direction.
SZMM5Z20VT5GF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 14 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-523
SZMM5Z20VT5GF FAQ
1.How can I place an order for SZMM5Z20VT5GF through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM5Z20VT5GF 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 SZMM5Z20VT5GF reliable?
The price and inventory of SZMM5Z20VT5GF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM5Z20VT5GF is usually 5 days.
3.What payment methods are accepted for SZMM5Z20VT5GF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM5Z20VT5GF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM5Z20VT5GF?
SZMM5Z20VT5GF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM5Z20VT5GF 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 SZMM5Z20VT5GF?
For technical support, including SZMM5Z20VT5GF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM5Z20VT5GF requirements.
6.How does Aetrix verify that SZMM5Z20VT5GF is sourced from the original manufacturer or authorized distributors?
All SZMM5Z20VT5GF 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 SZMM5Z20VT5GF meets industry standards.
7.What is the process for return or replacement of SZMM5Z20VT5GF?
All SZMM5Z20VT5GF units undergo pre-shipment inspection (PSI). If there is an issue with SZMM5Z20VT5GF, 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 SZMM5Z20VT5GF part is unused and in its original packaging.
Return procedure for SZMM5Z20VT5GF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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