My Inquiry
My Account
Nexperia USA Inc. SZMM5Z3V9T5GF
.jpg)
- Part No.:
- SZMM5Z3V9T5GF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
SZMM5Z3V9T5GF.pdf
- Description:
- DIODE ZENER 3.9V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:28,150
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SZMM5Z3V9T5GF from Nexperia is a Zener voltage regulator diode in SOD523 (SC-79) package, designed for precision low-voltage regulation and reference functions in space-constrained PCBs. It delivers a nominal 3.9 V Zener voltage at 5 mA, with ±2 % tolerance, 3.0 Ω differential resistance, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SZMM5Z3V9T5GF datasheet, SZMM5Z3V9T5GF pinout, SZMM5Z3V9T5GF application, or SZMM5Z3V9T5GF equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (Rth(j-sp) = 65 K/W), surge capability (40 W non-repetitive), and SC-79 footprint compatibility in power management, sensor biasing, and ECU voltage clamping circuits.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable output voltage across variable load currents by conducting reverse current above its breakdown threshold. Its low 3.0 Ω differential resistance ensures minimal voltage deviation under dynamic load changes, while the −3.5 to 0 mV/K temperature coefficient supports stable performance from −55 °C to +150 °C ambient.
The SOD523 package enables high-density placement with low thermal resistance to solder point (65 K/W), and its AEC-Q101 qualification confirms robustness against mechanical stress, temperature cycling, and humidity exposure required for automotive electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.82 V to 3.98 V at IZ = 5 mA - defines precise regulation point for 3.3 V–5 V rail monitoring and clamping |
| Differential Resistance (rdiff) | 3.0 Ω max - ensures ≤15 mV output shift per 5 mA load change, critical for reference stability |
| Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C on FR4 with 35 mm² cathode copper - sets continuous operating limit in compact layouts |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 µs square wave - enables transient overvoltage suppression in CAN/LIN bus nodes |
| Reverse Current (IR) | <90 µA at VR = 1 V - guarantees low leakage in battery-backed circuits and always-on subsystems |
| Thermal Resistance (Rth(j-sp)) | 65 K/W - allows direct thermal coupling to PCB copper, enabling operation up to 125 °C junction without heatsink |
| Temperature Coefficient (SZ) | −3.5 to 0 mV/K - minimizes drift across automotive temperature range, supporting accurate ADC reference scaling |
Pinout & Package
SZMM5Z3V9T5GF uses the SOD523 (SC-79) ultra-small surface-mount plastic package: 1.25 mm × 0.85 mm × 0.65 mm body, cathode-marked with a bar on side of package, optimized for reflow soldering per IPC-J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; marking bar identifies this terminal; carries full reverse current during regulation |
| 2 (A) | Anode | Connected to ground or lower-potential rail; completes shunt path; must be routed with low-inductance trace for transient response |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics per stress test requirements |
| ±2 % Zener voltage tolerance | Enables tight regulation without post-production trimming, reducing BOM count in safety-critical voltage monitors |
| Low 3.0 Ω differential resistance | Maintains regulation accuracy under fast load transients typical in microcontroller reset circuits and sensor excitation |
| Ultra-small SOD523 footprint | Reduces PCB area by >50 % vs. SOD-123, enabling placement adjacent to IC pins for local decoupling and clamping |
| 40 W non-repetitive surge rating | Withstands ISO 7637-2 pulse 1/2a/3a transients without failure, eliminating need for external TVS in cost-sensitive ECUs |
Applications
| Automotive ECU Voltage Clamping | Microcontroller Reset Circuit Reference |
|---|---|
|
Use Scenario: Protecting LIN bus transceiver inputs from load-dump-induced overvoltage in door module ECUs. IC Role / Device Role / Timing Role: Shunt clamp limiting input voltage to 3.9 V, preventing latch-up in 3.3 V logic interfaces. Use Value: Eliminates need for discrete TVS + resistor network; leverages 40 W surge rating to absorb ISO 7637-2 Pulse 2a without derating. |
Use Scenario: Providing stable reset threshold for ARM Cortex-M0+ MCU during cold cranking (6–16 V battery range). IC Role / Device Role / Timing Role: Zener reference feeding comparator input in supervisor IC, ensuring reset assertion below 3.6 V. Use Value: ±2 % tolerance and −3.5 mV/K TC guarantee reset window stays within 3.55–3.65 V across −40 °C to +125 °C. |
| Industrial Sensor Biasing | USB-C Port Overvoltage Protection |
|
Use Scenario: Supplying precision 3.9 V bias to MEMS pressure sensor bridge in HVAC controller. IC Role / Device Role / Timing Role: Low-noise voltage reference replacing LDO where quiescent current <1 µA is required in sleep mode. Use Value: 90 µA max reverse leakage at 1 V ensures sensor offset drift remains <0.5 LSB in 16-bit ADC systems. |
Use Scenario: Clamping VBUS line to 3.9 V during USB-C hot-plug events with legacy 5 V adapters. IC Role / Device Role / Timing Role: Fast-response shunt limiter activated before USB PD controller initiates fault shutdown. Use Value: 65 K/W Rth(j-sp) enables self-cooling during 100 ms overvoltage, avoiding thermal shutdown in portable docking stations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C3V9 | Same 3.9 V nominal, but ±5 % tolerance and SOD-323 package (1.7 × 1.3 mm) | Larger footprint; higher 10 Ω rdiff; not AEC-Q101 qualified | Select when cost is primary constraint and automotive qualification is unnecessary |
| MMSZ5227B | 3.9 V nominal, ±5 % tolerance, SOD-123 package, Ptot = 500 mW, no AEC-Q101 | Higher power handling but larger size; lacks automotive stress validation | Choose for industrial power supplies needing >300 mW continuous dissipation |
Compared with BZX584C3V9 and MMSZ5227B, SZMM5Z3V9T5GF offers tighter tolerance, lower dynamic impedance, smaller footprint, and verified automotive reliability-making it optimal for next-generation ADAS domain controllers and battery management sensors where space, accuracy, and qualification are non-negotiable.
Availability
SZMM5Z3V9T5GF is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor modules, USB-C protection circuits, and portable medical device power supervision requiring stable component supply and long-term lifecycle support.
Supply support for SZMM5Z3V9T5GF 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 essential efficiency-enhancing components, delivering high-performance, reliable devices for automotive, industrial, and consumer markets.
SZMM5Z3V9T5GF belongs to the SZMM5Z series of AEC-Q101-qualified Zener diodes engineered specifically for space-constrained, high-reliability voltage regulation in automotive electronics and industrial control systems.
FAQ
What is the maximum continuous forward current for SZMM5Z3V9T5GF?
The device is rated for 200 mA maximum forward current per Absolute Maximum Ratings (Table 5). However, it is operated in reverse-bias Zener mode; forward conduction is only relevant during polarity-reversal fault conditions or circuit startup sequencing, where VF remains ≤1.1 V at 100 mA pulse.
Can SZMM5Z3V9T5GF replace a 3.3 V Zener in an existing design?
No - its nominal Zener voltage is 3.9 V (3.82–3.98 V), not 3.3 V. Substituting it for a 3.3 V part would raise regulation threshold by ~600 mV, potentially causing undervoltage lockout in 3.3 V systems. Use SZMM5Z3V3T5G for 3.3 V applications.
How does the SOD523 package affect thermal performance compared to SOD-123?
SOD523 has higher thermal resistance (Rth(j-a) = 350 K/W vs. ~200 K/W for SOD-123), but its Rth(j-sp) = 65 K/W enables efficient heat transfer directly to the solder joint and PCB copper. This makes it more effective than SOD-123 in thermally optimized layouts with localized cathode copper pours.
Is SZMM5Z3V9T5GF suitable for use in a precision voltage reference circuit?
Yes - with ±2 % tolerance, 3.0 Ω rdiff, and −3.5 to 0 mV/K temperature coefficient, it provides adequate stability for non-critical references (e.g., comparator thresholds, reset generators). For sub-0.1 % accuracy, a bandgap reference IC is recommended instead.
SZMM5Z3V9T5GF 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):
- 3.9 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 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
SZMM5Z3V9T5GF FAQ
1.How can I place an order for SZMM5Z3V9T5GF through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM5Z3V9T5GF 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 SZMM5Z3V9T5GF reliable?
The price and inventory of SZMM5Z3V9T5GF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM5Z3V9T5GF is usually 5 days.
3.What payment methods are accepted for SZMM5Z3V9T5GF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM5Z3V9T5GF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM5Z3V9T5GF?
SZMM5Z3V9T5GF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM5Z3V9T5GF 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 SZMM5Z3V9T5GF?
For technical support, including SZMM5Z3V9T5GF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM5Z3V9T5GF requirements.
6.How does Aetrix verify that SZMM5Z3V9T5GF is sourced from the original manufacturer or authorized distributors?
All SZMM5Z3V9T5GF 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 SZMM5Z3V9T5GF meets industry standards.
7.What is the process for return or replacement of SZMM5Z3V9T5GF?
All SZMM5Z3V9T5GF units undergo pre-shipment inspection (PSI). If there is an issue with SZMM5Z3V9T5GF, 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 SZMM5Z3V9T5GF part is unused and in its original packaging.
Return procedure for SZMM5Z3V9T5GF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZMM5Z3V9T5GF Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
