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onsemi MM5Z39V
- Part No.:
- MM5Z39V
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523F
- Datasheet:
-
MM5Z39V.pdf
- Description:
- DIODE ZENER 39V 200MW SOD523F
- Quantity:
- Payment:
- Shipping:
Inventory:14,120
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Product details
Overview
MM5Z39V from Fairchild Semiconductor is a surface-mount Zener diode with nominal zener voltage 39 V (min 37 V, max 41 V) at test current 2 mA, dynamic impedance 130 Ω at IZT, power dissipation 200 mW, and operating temperature range −55 °C to +150 °C. It provides precision voltage regulation in compact power management circuits for industrial sensors and automotive control modules.
For engineers reviewing the MM5Z39V datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, SOD-523F package details, cathode band identification, thermal resistance (500 °C/W), and real-world substitution guidance for voltage reference design.
Technical Context
The MM5Z39V operates as a reverse-biased voltage reference device, maintaining stable output voltage across varying load currents within its specified IZK (0.5 mA) to IZT (2 mA) range. Its zener impedance (130 Ω at IZT) and low leakage current (0.05 μA at VR = 27.3 V) support accurate regulation in low-power analog monitoring paths.
Designed for surface-mount assembly on FR-4 PCBs with minimum land pads, it features moisture sensitivity level 1, matte tin lead finish, green mold compound, and JEITA SC79-compliant SOD-523F packaging under 0.70 mm height - enabling high-density layout in space-constrained embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ @ IZT | 37–41 V (39 V nominal); defines regulated output voltage under 2 mA DC test current |
| ZZT @ IZT | 130 Ω; small-signal AC impedance affecting regulation accuracy under dynamic load changes |
| PD | 200 mW; maximum continuous power dissipation at 25 °C ambient, limiting usable current in linear regulation |
| IR @ VR | 0.05 μA @ 27.3 V; reverse leakage establishing minimum bias stability before breakdown onset |
| RθJA | 500 °C/W; junction-to-ambient thermal resistance defining temperature rise per watt on standard FR-4 pad |
| TOPR | −55 °C to +150 °C; full operational range enabling use in under-hood automotive and industrial environments |
Pinout & Package
SOD-523F is a 2-lead, flat-lead, ultra-small outline plastic package measuring 1.2 × 0.8 × 0.7 mm (L × W × H), with cathode identified by a band on the body. Mounting requires FR-4 PCB minimum land pads per JEITA SC79 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward-biased terminal; connected to lower-potential node in reverse-regulation configuration |
| 2 | Cathode | Marked by band; connected to higher-potential node and serves as regulated output reference point |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low profile | 0.70 mm height enables placement beneath connectors or in stacked PCB assemblies |
| Moisture Sensitivity Level 1 | No bake requirement prior to reflow, reducing manufacturing complexity and cost |
| RoHS-compliant matte tin finish | Lead-free termination compatible with Pb-free soldering processes and environmental compliance |
| Green mold compound | Halogen-free encapsulant meeting IPC-4101D/126 requirements for flame retardancy and reliability |
Applications
| Industrial Sensor Signal Conditioning | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Stabilizing reference voltage for 4–20 mA transmitter ICs in pressure and temperature transducers. IC Role / Device Role / Timing Role: Voltage reference element providing fixed bias point for op-amp feedback networks and ADC reference dividers. Use Value: Tight 37–41 V tolerance and 0.05 μA leakage ensure <0.1% reference drift over temperature in unregulated 24 V supply rails. | Use Scenario: Overvoltage clamping on LIN bus interface lines exposed to load-dump transients. IC Role / Device Role / Timing Role: Transient voltage suppression component shunting surge energy above 27.3 V threshold. Use Value: 200 mW power rating and −55 °C to +150 °C operation sustain protection function during extended engine-off storage and hot-cranking conditions. |
| Programmable Logic Controller (PLC) Input Stage | DC-DC Converter Feedback Network |
Use Scenario: Providing isolated 39 V reference for optocoupler-based digital input threshold detection. IC Role / Device Role / Timing Role: Precision voltage clamp defining logic-high recognition level in 24 V industrial I/O modules. Use Value: 130 Ω zener impedance ensures minimal voltage shift (<100 mV) across 0.5–2 mA input current variation, improving noise immunity. | Use Scenario: Setting output voltage of isolated flyback converter via TL431-compatible feedback divider. IC Role / Device Role / Timing Role: Secondary-side voltage reference replacing bulkier TO-92 devices in compact 5 W auxiliary supplies. Use Value: SOD-523F footprint reduces board area by >70% versus SOD-123 while maintaining identical regulation performance at 2 mA bias. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C39 | Same 39 V nominal VZ, but 300 mW PD, 120 Ω ZZT, SOD-523 package (not SOD-523F) | Higher power handling supports transient-heavy environments; slightly different thermal profile due to mold compound variance | Preferred where peak pulse power exceeds 200 mW but board space remains constrained |
| MMSZ5242B | 39 V nominal VZ, 500 mW PD, 150 Ω ZZT, SOD-123 package | Larger footprint and higher thermal mass suit high-reliability industrial power supplies with forced-air cooling | Select when long-term stability under continuous 3–5 mA bias is required and layout allows 2.7 × 1.6 mm area |
Compared with BZX584-C39 and MMSZ5242B, the MM5Z39V offers the lowest profile (0.7 mm height) and tightest leakage (0.05 μA), making it optimal for ultra-thin consumer electronics and thermally isolated sensor nodes where board thickness and standby current are critical.
Availability
MM5Z39V is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, automotive body control modules, and programmable logic controller input stages requiring stable component supply and RoHS-compliant sourcing.
Supply support for MM5Z39V 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
Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016.
The MM5Z39V belongs to Fairchild's MM5Z series of miniature Zener diodes engineered for high-density voltage regulation and transient suppression in space-limited industrial and automotive electronics.
FAQ
What is the zener voltage tolerance of MM5Z39V?
The MM5Z39V has a zener voltage range of 37 V (minimum) to 41 V (maximum) at 2 mA test current, yielding ±2.6% tolerance around the nominal 39 V rating. This specification is measured under pulse conditions (10 ms) per the official Fairchild datasheet Rev. 1.5, and applies strictly to the MM5Z39V variant - not the broader MM5Z2V4–MM5Z75V family.
Does MM5Z39V support lead-free reflow soldering?
Yes, the MM5Z39V features matte tin (Sn) lead finish and is RoHS compliant, qualified for standard Pb-free reflow profiles including J-STD-020D peak temperatures up to 260 °C. Its moisture sensitivity level 1 eliminates pre-bake requirements, simplifying manufacturing flow for high-volume SMT assembly lines using the MM5Z39V.
What is the maximum reverse leakage current for MM5Z39V?
The MM5Z39V exhibits a maximum reverse leakage current of 0.05 μA at VR = 27.3 V, as specified in the Fairchild datasheet. This value reflects worst-case leakage under rated reverse voltage and is critical for low-power battery-backed systems where standby current must remain below 100 nA - the MM5Z39V meets that requirement with margin.
Can MM5Z39V replace MM5Z36V or MM5Z43V in existing designs?
No - the MM5Z39V is not a drop-in replacement for MM5Z36V (36 V) or MM5Z43V (43 V) due to its distinct 39 V nominal zener voltage and associated parameter set (e.g., 130 Ω ZZT, 0.05 μA IR). Substitution would alter regulation thresholds and feedback loop behavior; redesign validation is required if changing to MM5Z39V from either variant.
What package type does MM5Z39V use and how is polarity identified?
The MM5Z39V uses the SOD-523F package - a JEITA SC79-compliant 2-lead surface-mount outline measuring 1.2 × 0.8 × 0.7 mm. Polarity is identified by a visible band on the component body, which marks Pin 2 (cathode); Pin 1 (anode) is unmarked and located opposite the band, consistent with all devices in the MM5Z2V4–MM5Z75V series.
MM5Z39V Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-79, SOD-523F
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 39 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 130 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 27.3 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523F
MM5Z39V FAQ
1.How can I place an order for MM5Z39V through Aetrix?
Please submit a Request for Quotation (RFQ) for MM5Z39V 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 MM5Z39V reliable?
The price and inventory of MM5Z39V are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5Z39V is usually 5 days.
3.What payment methods are accepted for MM5Z39V?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5Z39V transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM5Z39V?
MM5Z39V orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM5Z39V 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 MM5Z39V?
For technical support, including MM5Z39V datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5Z39V requirements.
6.How does Aetrix verify that MM5Z39V is sourced from the original manufacturer or authorized distributors?
All MM5Z39V 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 MM5Z39V meets industry standards.
7.What is the process for return or replacement of MM5Z39V?
All MM5Z39V units undergo pre-shipment inspection (PSI). If there is an issue with MM5Z39V, 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 MM5Z39V part is unused and in its original packaging.
Return procedure for MM5Z39V:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MM5Z39V Tags
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