My Inquiry
My Account
Diodes Incorporated MMSZ5237BS-7-F
- Part No.:
- MMSZ5237BS-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MMSZ5237BS-7-F.pdf
- Description:
- DIODE ZENER 8.2V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:100,208
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMSZ5237BS-7-F from Diodes Incorporated is a surface-mount 8.2 V Zener diode in SOD-323 package, rated for 200 mW power dissipation, 20 mA test current, and 8 Ω maximum Zener impedance at 20 mA. It provides precise voltage regulation in low-power biasing, reference, and protection circuits across consumer and industrial PCBs.
For engineers reviewing the MMSZ5237BS-7-F datasheet, MMSZ5237BS-7-F pinout, MMSZ5237BS-7-F application, or MMSZ5237BS-7-F equivalent, key selection criteria include nominal Zener voltage (8.2 V), tight tolerance (±5%), low leakage (<3 µA at 6.5 V), thermal resistance (625 °C/W), and SOD-323 footprint compatibility with automated assembly.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load or supply conditions. Its planar die construction ensures consistent breakdown characteristics and low dynamic impedance (8 Ω at IZT = 20 mA) for reliable regulation in feedback networks and voltage references.
The device is optimized for ambient temperatures from –65 °C to +150 °C and exhibits <3 µA reverse leakage at VR = 6.5 V. Its 200 mW power rating and 625 °C/W junction-to-ambient thermal resistance require appropriate PCB copper area per Diodes' AP02001 layout guidelines to sustain full-rated dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nom) | 8.2 V - Stable regulation point at 20 mA test current, ±5% tolerance (7.79–8.61 V) |
| Power Dissipation | 200 mW - Maximum continuous DC power handling on FR-4 board with recommended pad layout |
| Zener Impedance | 8 Ω @ 20 mA - Low dynamic resistance ensures minimal output voltage variation under load changes |
| Reverse Leakage | 3.0 µA @ 6.5 V - Confirms low standby current in voltage-sense or clamping applications |
| Thermal Resistance | 625 °C/W - Requires thermal-aware PCB layout to avoid exceeding 150 °C junction temperature |
| Package | SOD-323 - 2-pin surface-mount outline (2.3–2.7 mm length, 1.2–1.4 mm width) compatible with high-speed pick-and-place |
Pinout & Package
Package: SOD-323 - molded plastic case, cathode band marking, matte tin-plated Alloy 42 leadframe, weight ≈ 0.004 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in reverse-biased regulation; defines polarity for correct orientation on PCB |
| Cathode | Reverse breakdown terminal / Zener voltage output node | Marked with band; supplies regulated voltage referenced to anode; must be held at higher potential than anode during operation |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures repeatable Zener voltage distribution and long-term stability under thermal cycling |
| SOD-323 package | Enables high-density placement and compatibility with standard 0805-class reflow profiles and AOI inspection |
| Lead-free & RoHS compliant | Fully EU Directive 2011/65/EU compliant with <900 ppm Br/Cl and <1000 ppm Sb compounds |
| Low Zener impedance | 8 Ω at 20 mA supports tight regulation in precision reference and feedback divider applications |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 8.2 V reference for linear regulator feedback or ADC reference buffer. IC Role / Device Role / Timing Role: Voltage reference element establishing precise DC bias point in analog signal chains. Use Value: Tight 8.2 V ±5% tolerance and low 8 Ω impedance minimize drift and ripple sensitivity in low-noise analog subsystems. |
Use Scenario: Protecting microcontroller I/O pins from transient overvoltage events up to ±15 V. IC Role / Device Role / Timing Role: Shunt clamping device diverting excess current when input exceeds 8.2 V + forward drop. Use Value: Fast response to transients and <3 µA leakage at 6.5 V preserve signal integrity and reduce standby power loss. |
| Current Source Bias | Temperature-Stable Oscillator Trim |
Use Scenario: Setting constant bias current for op-amp input stages or LED drivers using resistor-Zener network. IC Role / Device Role / Timing Role: Fixed-voltage node enabling predictable current through series resistor. Use Value: 200 mW rating allows ≥2.4 mA bias current at 8.2 V while maintaining thermal margin on standard PCBs. |
Use Scenario: Fine-tuning oscillator frequency in crystal-based real-time clocks by adjusting load capacitance via Zener-biased varactor. IC Role / Device Role / Timing Role: Stable DC bias generator for voltage-controlled capacitor in timing loop. Use Value: Low temperature coefficient (implied by planar construction and 625 °C/W RθJA) reduces frequency drift across –40 to +85 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B8V2,115 (Nexperia) | Same 8.2 V nominal, SOD-323, but 300 mW rating and 15 Ω ZZT | Higher power margin enables use in higher-current clamp circuits; higher ZZT reduces regulation precision | Select when >200 mW derating headroom is required and ±5% voltage stability remains acceptable |
| MMBZ5237BS-7-F (Diodes Inc.) | Identical electrical specs, but SOT-23 package (3-pin, anode/cathode/common) with different footprint and thermal profile | Requires redesign of PCB layout; offers better heat dissipation (RθJA ≈ 300 °C/W) but larger area | Choose only if existing SOT-23 land pattern is fixed and thermal performance outweighs size constraints |
Compared with BZX384-B8V2,115 and MMBZ5237BS-7-F, the MMSZ5237BS-7-F delivers optimal balance of compact SOD-323 size, 8 Ω regulation impedance, and 200 mW capability-making it preferred for space-constrained, precision-bias designs where thermal load is moderate.
Availability
MMSZ5237BS-7-F is available at Aetrix Electronics and suitable for voltage reference design, overvoltage protection, and current-source biasing requiring stable component supply and RoHS-compliant sourcing.
Supply support for MMSZ5237BS-7-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, industry-qualified components for automotive, industrial, and consumer markets.
The MMSZ52xxBS series targets cost-sensitive, high-volume applications needing compact, lead-free Zener regulation-designed specifically for automated SMT assembly and stable performance across extended temperature ranges.
FAQ
What is the maximum reverse voltage this Zener can withstand before breakdown?
The MMSZ5237BS-7-F has a nominal Zener voltage of 8.2 V with a guaranteed range of 7.79 V to 8.61 V at 20 mA test current. Breakdown occurs within this range; operation above 8.61 V at rated current may exceed safe power limits. The device is not rated for sustained reverse voltage beyond its specified Zener range.
Can this diode be used in series for higher voltage regulation?
Yes-multiple MMSZ5237BS-7-F diodes can be connected in series to achieve higher regulated voltages (e.g., two in series yield ~16.4 V). However, ensure matched units or derate total power, as leakage and impedance mismatches may cause uneven voltage division and thermal runaway under load.
Is the SOD-323 package compatible with standard reflow soldering profiles?
Yes-the SOD-323 package is qualified for lead-free reflow per J-STD-020D Level 1 moisture sensitivity. Diodes Incorporated specifies compatibility with standard Pb-free peak temperatures up to 260 °C, provided the recommended pad layout (AP02001) is followed to manage thermal stress and solder joint reliability.
How does the 625 °C/W thermal resistance affect PCB layout?
A 625 °C/W RθJA means each 100 mW dissipated raises junction temperature by 62.5 °C above ambient. To stay within the 150 °C max junction limit at 70 °C ambient, keep power ≤128 mW unless additional copper pour or thermal vias reduce effective RθJA, per Diodes' AP02001 layout guidance.
MMSZ5237BS-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 8.2 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 8 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 6.5 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
MMSZ5237BS-7-F FAQ
1.How can I place an order for MMSZ5237BS-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5237BS-7-F 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 MMSZ5237BS-7-F reliable?
The price and inventory of MMSZ5237BS-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5237BS-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5237BS-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5237BS-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5237BS-7-F?
MMSZ5237BS-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5237BS-7-F 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 MMSZ5237BS-7-F?
For technical support, including MMSZ5237BS-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5237BS-7-F requirements.
6.How does Aetrix verify that MMSZ5237BS-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5237BS-7-F 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 MMSZ5237BS-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5237BS-7-F?
All MMSZ5237BS-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5237BS-7-F, 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 MMSZ5237BS-7-F part is unused and in its original packaging.
Return procedure for MMSZ5237BS-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ5237BS-7-F 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
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…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
