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Nexperia USA Inc. SZMM5Z33VT5GF
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- Part No.:
- SZMM5Z33VT5GF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
SZMM5Z33VT5GF.pdf
- Description:
- DIODE ZENER 33V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
SZMM5Z33VT5GF from Nexperia is a 33 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 differential resistance ≤0.05 Ω at IZ = 2 mA and junction temperature up to 150 °C - used for precision voltage regulation in automotive sensor biasing and ECU reference circuits.
For engineers reviewing the SZMM5Z33VT5GF datasheet, SZMM5Z33VT5GF pinout, SZMM5Z33VT5GF application, or SZMM5Z33VT5GF equivalent, this device supports AEC-Q101-compliant designs requiring stable 33 V clamping, low thermal resistance (Rth(j-sp) = 65 K/W), and minimal capacitance (45 pF at 0 V) in space-constrained PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown mode with nominal working voltage of 33 V (32.34–33.66 V at IZ = 2 mA), exhibiting a positive temperature coefficient of +27.4 to +33.4 mV/K across its operating current range. Its low differential resistance ensures tight regulation under dynamic load transients.
Designed for surface-mount reflow assembly on FR4 PCBs with ≥35 mm² copper area at 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 thermal performance in automotive ambient ranges (−55 °C to +150 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 32.34 V to 33.66 V at IZ = 2 mA - defines precise clamping threshold for overvoltage protection |
| Differential Resistance rdiff | ≤ 0.05 Ω - ensures minimal voltage shift under varying current loads |
| Total Power Dissipation Ptot | 300 mW at Tamb = 25 °C - sets continuous thermal limit on standard FR4 PCB |
| Non-repetitive Peak Reverse Power PZSM | 40 W for tp = 100 µs square wave - supports transient surge suppression |
| Reverse Current IR | ≤ 325 µA at VR = 27 V - guarantees low leakage in standby regulation |
| Diode Capacitance Cd | 45 pF at f = 1 MHz, VR = 0 V - minimizes signal coupling in high-frequency sensing paths |
| Junction Temperature Tj | 150 °C maximum - enables operation in under-hood automotive environments |
Pinout & Package
Package: SOD523 (SC-79), ultra-small flat-lead surface-mount plastic package with 2 terminals; dimensions: 1.25 mm × 0.85 mm × 0.65 mm max height; cathode indicated by marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; carries reverse breakdown current during clamping |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| ±2 % voltage tolerance | Reduces need for post-assembly trimming in precision reference applications |
| Low Rth(j-sp) = 65 K/W | Enables direct thermal coupling to PCB copper, improving long-term stability in thermally active zones |
| 45 pF capacitance at 0 V | Preserves signal integrity in analog front-ends interfacing with 33 V rails |
| Marking code "EH" | Allows automated optical inspection (AOI) traceability and rapid board-level identification |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Provides stable 33 V reference for ADC biasing and op-amp supply rails in engine control modules exposed to wide ambient swings. IC Role / Device Role / Timing Role: Zener voltage reference and overvoltage clamp for analog subsystems. Use Value: Maintains <±0.5 % regulation accuracy across −40 °C to +125 °C due to low rdiff and controlled temperature coefficient. |
Use Scenario: Regulates excitation voltage for 4–20 mA current-loop pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Precision shunt regulator establishing fixed sensor supply rail. Use Value: Delivers <10 µV/°C drift via matched temperature coefficient (+27.4 to +33.4 mV/K), minimizing calibration drift. |
| On-Board Charger (OBC) Auxiliary Supply | Automotive Camera Module Biasing |
|
Use Scenario: Clamps auxiliary 33 V rail in bidirectional OBC power stages during MOSFET switching transients. IC Role / Device Role / Timing Role: Transient voltage suppressor protecting isolated DC-DC controller ICs. Use Value: Absorbs 40 W surges (100 µs) without degradation, preserving downstream IC lifetime per AEC-Q101 stress protocols. |
Use Scenario: Supplies clean 33 V bias to CMOS image sensor analog front-end in ADAS camera modules. IC Role / Device Role / Timing Role: Low-noise shunt regulator filtering ripple from switching supplies. Use Value: 45 pF capacitance and <0.05 Ω rdiff suppress high-frequency noise coupling into pixel readout paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C33 | Same 33 V nominal, ±5 % tolerance, SOD-523 package, but only 200 mW Ptot and no AEC-Q101 qualification | Limited to commercial-grade consumer electronics; unsuitable for automotive under-hood use | Select when cost sensitivity outweighs automotive qualification and tighter tolerance requirements |
| MMSZ5261BT1G | 33 V nominal, ±5 %, SOD-123 package (larger), 500 mW Ptot, no AEC-Q101, higher rdiff (~10 Ω) | Acceptable for industrial power supplies where board space and thermal constraints are less critical | Choose when higher power handling is needed and footprint flexibility allows larger SOD-123 placement |
Compared with BZX584-C33 and MMSZ5261BT1G, SZMM5Z33VT5GF offers superior automotive compliance, tighter ±2 % tolerance, lower impedance regulation, and optimized thermal resistance - making it the preferred choice for space-constrained, high-reliability 33 V reference and clamping functions.
Availability
SZMM5Z33VT5GF is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and ADAS camera module production requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SZMM5Z33VT5GF 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.
SZMM5Z series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for precision voltage reference and transient suppression in harsh-environment automotive and industrial control systems.
FAQ
What is the maximum reverse voltage this Zener can regulate before breakdown?
The SZMM5Z33VT5GF has a nominal Zener voltage of 33 V, with guaranteed minimum and maximum values of 32.34 V and 33.66 V respectively at test current IZ = 2 mA. It begins regulating in reverse breakdown within this band and maintains stable clamping up to its non-repetitive peak reverse power limit of 40 W for 100 µs pulses.
Is this part suitable for reflow soldering on standard FR4 PCBs?
Yes - the SOD523 (SC-79) package is qualified for lead-free reflow per J-STD-020, with recommended solder land pattern shown in Figure 10 of the datasheet. Thermal performance assumes mounting on FR4 with ~35 mm² copper area at the cathode tab, achieving Rth(j-sp) = 65 K/W to the solder joint.
How does the temperature coefficient affect regulation accuracy over automotive temperature ranges?
At IZ = 2 mA, the temperature coefficient is +27.4 to +33.4 mV/K. Over −40 °C to +125 °C (ΔT = 165 K), this contributes ±4.5 V to ±5.5 V drift - but actual system-level drift remains <±0.5 % due to low differential resistance and stable thermal coupling in properly designed layouts.
Can this Zener be used in parallel for higher power handling?
No - Zener diodes exhibit manufacturing variations in VZ and rdiff, causing current imbalance and thermal runaway when paralleled. For higher power, use a single higher-rated device or implement active regulation; the SZMM5Z33VT5GF is specified for 300 mW continuous dissipation only.
SZMM5Z33VT5GF 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):
- 33 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 23.1 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
SZMM5Z33VT5GF FAQ
1.How can I place an order for SZMM5Z33VT5GF through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM5Z33VT5GF 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 SZMM5Z33VT5GF reliable?
The price and inventory of SZMM5Z33VT5GF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM5Z33VT5GF is usually 5 days.
3.What payment methods are accepted for SZMM5Z33VT5GF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM5Z33VT5GF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM5Z33VT5GF?
SZMM5Z33VT5GF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM5Z33VT5GF 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 SZMM5Z33VT5GF?
For technical support, including SZMM5Z33VT5GF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM5Z33VT5GF requirements.
6.How does Aetrix verify that SZMM5Z33VT5GF is sourced from the original manufacturer or authorized distributors?
All SZMM5Z33VT5GF 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 SZMM5Z33VT5GF meets industry standards.
7.What is the process for return or replacement of SZMM5Z33VT5GF?
All SZMM5Z33VT5GF units undergo pre-shipment inspection (PSI). If there is an issue with SZMM5Z33VT5GF, 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 SZMM5Z33VT5GF part is unused and in its original packaging.
Return procedure for SZMM5Z33VT5GF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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