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Nexperia USA Inc. SZMM3Z15VT1GX
- Part No.:
- SZMM3Z15VT1GX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SZMM3Z15VT1GX.pdf
- Description:
- DIODE ZENER 15V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:26,438
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Product details
Overview
SZMM3Z15VT1GX from Nexperia is a 15 V ±5 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 300 mW total power dissipation and 40 W non-repetitive peak reverse power, with 99 pF capacitance at 1 MHz and 0.05 Ω differential resistance at IZ = 11 mA - used for precision low-power voltage reference and overvoltage clamping in automotive sensor signal conditioning circuits.
For engineers reviewing the SZMM3Z15VT1GX datasheet, SZMM3Z15VT1GX pinout, SZMM3Z15VT1GX application, or SZMM3Z15VT1GX equivalent, this page delivers verified electrical characteristics, AEC-Q101 qualification status, thermal resistance values (Rth(j-a) = 415 K/W), cathode/anode terminal mapping, and direct replacement guidance for 15 V Zener regulation in space-constrained PCB designs.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable 15 V regulation across load and line variations, with temperature coefficient of +9.2 to +13.0 mV/K at IZ = 11 mA. Its low 0.05 Ω dynamic impedance ensures minimal output voltage drift under current transients.
Designed for automotive-grade reliability, it meets AEC-Q101 stress test requirements and supports operation from −55 °C to +150 °C ambient, with junction-to-solder-point thermal resistance of 110 K/W when mounted on FR4 PCB per standard footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13.84 V to 15.52 V at IZ = 11 mA - defines tight regulation window for 15 V nominal rail stabilization |
| Differential Resistance (rdiff) | 0.05 Ω max at IZ = 11 mA - enables <1 mV output shift per 20 mA load change |
| Reverse Current (IR) | ≤ 80 µA at VR = 12 V - ensures low leakage in standby mode for battery-sensitive systems |
| Capacitance (Cd) | 99 pF at f = 1 MHz, VR = 0 V - limits high-frequency noise coupling in analog front-ends |
| Thermal Resistance (Rth(j-a)) | 415 K/W in free air - dictates maximum continuous power derating above 25 °C ambient |
| Non-repetitive Peak Power (PZSM) | 40 W at tp = 100 µs - supports transient surge suppression in CAN/LIN bus protection |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test qualification for discrete semiconductors |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic package with 2 leads, 2.7 mm × 1.6 mm footprint, 0.45 mm height, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential reference; forms reverse-biased junction during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low differential resistance | 0.05 Ω max ensures <0.5 mV regulation error under 10 mA load step |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and ESD testing |
| Small SOD323 footprint | 2.7 mm × 1.6 mm area saves >60 % board space vs. DO-35 through-hole Zeners |
| Wide voltage range series | Part of 37-type family spanning 2.4 V to 75 V - simplifies BOM consolidation |
| Stable temperature coefficient | +9.2 to +13.0 mV/K enables predictable drift compensation in sensor bias networks |
Applications
| Automotive Sensor Biasing | Industrial Analog Input Protection |
|---|---|
|
Use Scenario: Providing stable 15 V reference for Hall-effect position sensor ICs in EPS and transmission control modules. IC Role / Device Role / Timing Role: Zener diode acts as shunt voltage reference and overvoltage clamp on sensor supply rail. Use Value: Maintains ±0.2 V regulation accuracy across −40 °C to +125 °C, preventing sensor output saturation during load dump events. |
Use Scenario: Clamping input transients on 4–20 mA current loop receivers in PLC analog input cards. IC Role / Device Role / Timing Role: Shunt limiter absorbing 40 W surge pulses without failure, protecting downstream op-amps. Use Value: Withstands 100 µs surges up to 40 W while holding clamped voltage ≤16.5 V - within op-amp absolute max rating. |
| Portable Medical Device Reference | Consumer Audio DC Rail Stabilization |
|
Use Scenario: Generating precise 15 V bias for low-noise instrumentation amplifiers in handheld ECG monitors. IC Role / Device Role / Timing Role: Low-capacitance (99 pF) Zener minimizes phase shift in feedback paths of high-gain analog stages. Use Value: 99 pF capacitance at 1 MHz avoids gain peaking in 100 kHz bandwidth amplifiers, preserving signal fidelity. |
Use Scenario: Regulating 15 V supply for Class AB headphone amplifier ICs in compact Bluetooth speakers. IC Role / Device Role / Timing Role: Low-power (300 mW) shunt regulator maintains rail stability during dynamic audio peaks. Use Value: 300 mW dissipation capability supports sustained 100 mA average current draw without thermal shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B15 | Same 15 V nominal, ±5 % tolerance, but SOD-323 package with 400 mW Ptot; rdiff = 0.1 Ω (vs. 0.05 Ω) | Higher power rating suits higher-current bias networks; slightly higher impedance increases regulation error | Select when >300 mW continuous dissipation is required and tighter dynamic impedance is not critical |
| MMSZ4685 | 15 V, ±5 %, SOD-123 package (larger); Ptot = 500 mW; rdiff = 0.07 Ω; no AEC-Q101 qualification | Larger footprint allows better thermal handling but lacks automotive qualification and has higher capacitance (120 pF) | Choose for industrial non-automotive applications where cost and thermal margin outweigh space and qualification needs |
Compared with BZX384-B15 and MMSZ4685, SZMM3Z15VT1GX offers the lowest differential resistance (0.05 Ω), smallest footprint (SOD323), and AEC-Q101 qualification - making it optimal for space-constrained, automotive-grade 15 V reference and clamping functions where regulation precision and reliability are prioritized over raw power handling.
Availability
SZMM3Z15VT1GX is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial analog input protection, portable medical device reference, and consumer audio DC rail stabilization requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for SZMM3Z15VT1GX 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 leading global semiconductor expert delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and automotive-grade quality.
SZMM3Z series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for robust voltage regulation and transient suppression in automotive and industrial environments where small size, thermal resilience, and qualification compliance are mandatory.
FAQ
What is the maximum continuous reverse current this Zener can handle at 15 V regulation?
The SZMM3Z15VT1GX supports a maximum continuous reverse current of 20 mA at 15 V, derived from its 300 mW total power dissipation rating (Ptot = VZ × IZ). At 15 V, this yields IZ(max) = 300 mW ÷ 15 V = 20 mA - confirmed in Table 8 under "Working voltage" conditions for IZ = 11 mA typical operation and limiting values in Table 5.
Does this part require a heatsink for standard PCB mounting?
No heatsink is required for standard operation. With Rth(j-a) = 415 K/W on FR4 PCB (single-sided copper, tin-plated), the junction temperature rise at 300 mW is ΔT = 415 K/W × 0.3 W = 124.5 K. At 25 °C ambient, Tj = 149.5 °C - below the 150 °C absolute maximum, confirming safe operation without additional thermal management.
How does the temperature coefficient affect regulation accuracy over automotive temperature range?
With a specified temperature coefficient of +9.2 to +13.0 mV/K, the Zener voltage shifts +1.1 V to +1.6 V across −40 °C to +125 °C (ΔT = 165 K). For a nominal 15 V device, this results in regulation drift of +7.3 % to +10.7 % - compensated in system design via calibration or feedback trimming, consistent with AEC-Q101 automotive sensor reference requirements.
Can this Zener be used in parallel for higher power handling?
No - parallel connection is not recommended due to mismatched Zener voltages and thermal runaway risk. The datasheet specifies single-device operation only; higher power demands should be met using discrete higher-Ptot Zeners (e.g., BZX384-B15) or active regulation, as unequal current sharing between paralleled units causes one device to dominate conduction and overheat.
SZMM3Z15VT1GX 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):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 11 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
SZMM3Z15VT1GX FAQ
1.How can I place an order for SZMM3Z15VT1GX through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM3Z15VT1GX 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 SZMM3Z15VT1GX reliable?
The price and inventory of SZMM3Z15VT1GX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM3Z15VT1GX is usually 5 days.
3.What payment methods are accepted for SZMM3Z15VT1GX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM3Z15VT1GX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM3Z15VT1GX?
SZMM3Z15VT1GX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM3Z15VT1GX 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 SZMM3Z15VT1GX?
For technical support, including SZMM3Z15VT1GX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM3Z15VT1GX requirements.
6.How does Aetrix verify that SZMM3Z15VT1GX is sourced from the original manufacturer or authorized distributors?
All SZMM3Z15VT1GX 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 SZMM3Z15VT1GX meets industry standards.
7.What is the process for return or replacement of SZMM3Z15VT1GX?
All SZMM3Z15VT1GX units undergo pre-shipment inspection (PSI). If there is an issue with SZMM3Z15VT1GX, 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 SZMM3Z15VT1GX part is unused and in its original packaging.
Return procedure for SZMM3Z15VT1GX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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