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MMSZ5237B_R1_00001
Panjit International Inc.
SOD-123, ZENER
26175 Pcs New Original In Stock
Zener Diode 8.2 V 500 mW ±5% Surface Mount SOD-123
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5.0 / 5.0
- (495 Ratings)
MMSZ5237B_R1_00001
Product Overview
12965427
DiGi Electronics Part Number
MMSZ5237B_R1_00001-DGManufacturer
Panjit International Inc.
MMSZ5237B_R1_00001
Description
SOD-123, ZENERInventory
26175 Pcs New Original In Stock
Zener Diode 8.2 V 500 mW ±5% Surface Mount SOD-123
Quantity
Minimum 1
Minimum 1
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MMSZ5237B_R1_00001 Technical Specifications
Category
Diodes, Zener, Single Zener Diodes
Packaging
Tape & Reel (TR)
Series
-
Product Status
Active
Voltage - Zener (Nom) (Vz)
8.2 V
Tolerance
±5%
Power - Max
500 mW
Impedance (Max) (Zzt)
8 Ohms
Current - Reverse Leakage @ Vr
3 µA @ 6 V
Operating Temperature
-55°C ~ 150°C (TJ)
Mounting Type
Surface Mount
Package / Case
SOD-123
Supplier Device Package
SOD-123
Base Product Number
MMSZ5237
Datasheet & Documents
HTML Datasheet
MMSZ5237B_R1_00001-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8541.10.0050
Additional Information
Other Names
3757-MMSZ5237B_R1_00001DKR
3757-MMSZ5237B_R1_00001TR
Standard Package
3,000
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
MMSZ5237B-AU_R1_000A1
Panjit International Inc.
3900
MMSZ5237B-AU_R1_000A1-DG
0.0118
Parametric Equivalent
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Choosing DiGi Electronics has always been a smart decision for me.
Dec 02, 2025
I value their honest approach to pricing and their vast product selection.
Dec 02, 2025
They offer comprehensive support that ensures our technology operates flawlessly over the long term.
Dec 02, 2025
The shipping box was robust and intact, protecting the contents effectively from damage.
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Frequently Asked Questions (FAQ)
Can I use the MMSZ5237B_R1_00001 to replace a BZT52C8V2 in a low-power voltage reference circuit, and what are the key risks in doing so?
Yes, the MMSZ5237B_R1_00001 (8.2 V, ±5%, 500 mW) can generally replace the BZT52C8V2 (8.2 V, ±5%, 500 mW) in low-power reference applications due to matching nominal voltage, tolerance, and power rating. However, the MMSZ5237B_R1_00001 has a slightly higher typical dynamic impedance (8 Ω vs. ~5 Ω for BZT52C8V2), which may result in marginally less stable output under varying load currents. Additionally, confirm PCB footprint compatibility—both use SOD-123, but pad geometries can vary between manufacturers. Always validate thermal performance under actual operating conditions, especially if the circuit operates near the upper end of the temperature range (-55°C to 150°C), as Zener characteristics drift with temperature.
What design constraints should I consider when using the MMSZ5237B_R1_00001 in a high-temperature automotive environment near its 150°C junction limit?
When deploying the MMSZ5237B_R1_00001 in high-temperature automotive applications (e.g., under-hood electronics), derating is critical. Although the max junction temperature is 150°C, continuous operation above 125°C significantly accelerates degradation and increases reverse leakage current—already 3 µA at 6 V but rising exponentially with temperature. Ensure adequate PCB copper area for heat dissipation and avoid placing the device near other heat sources. Also, verify that your system’s worst-case ambient temperature, combined with self-heating from power dissipation (P = Vz × Iz), does not push Tj beyond safe limits. Consider adding a small thermal relief gap or using a higher-power Zener (e.g., 1 W in SMA package) if sustained current exceeds 30–40 mA.
How does the MMSZ5237B_R1_00001 compare to the ON Semiconductor MMSZ5237BT1G for reliability in moisture-sensitive industrial control systems?
Both the MMSZ5237B_R1_00001 (Panjit) and MMSZ5237BT1G (ON Semiconductor) are rated MSL 1, meaning they are not moisture-sensitive and can be stored and handled without dry packing—ideal for industrial environments. However, Panjit’s MMSZ5237B_R1_00001 specifies a wider operating temperature range (-55°C to 150°C) compared to ON Semi’s typical -65°C to 150°C, though both are suitable for most industrial use cases. The key reliability differentiator lies in long-term parametric stability: ON Semi historically has tighter process controls, but Panjit’s ROHS3 compliance and REACH unaffected status ensure modern environmental robustness. For mission-critical systems, conduct extended burn-in testing; otherwise, either is acceptable with proper derating.
Is it safe to use the MMSZ5237B_R1_00001 as a transient voltage suppressor in a 12 V automotive input protection circuit, and what are the failure risks?
Using the MMSZ5237B_R1_00001 as a TVS in a 12 V automotive line is risky and not recommended for sustained or high-energy transients. While its 8.2 V Zener voltage can clamp mild overvoltages, the 500 mW power rating limits energy absorption to very short pulses (<1 ms). Automotive load dump events can deliver hundreds of watts for tens of milliseconds—far exceeding this diode’s capability, leading to thermal runaway and catastrophic failure. Instead, use a dedicated TVS diode (e.g., SMAJ12A) rated for ISO 7637-2 pulses. If you must use the MMSZ5237B_R1_00001 for minor clamping, add a series resistor to limit current and ensure it’s only part of a multi-stage protection scheme.
What integration challenges might arise when replacing a through-hole 1N5237B with the surface-mount MMSZ5237B_R1_00001 in an existing PCB layout?
Replacing a through-hole 1N5237B with the surface-mount MMSZ5237B_R1_00001 introduces several integration risks: first, the SOD-123 package has significantly lower thermal mass, which reduces transient thermal resilience—avoid placing it on narrow traces that can’t dissipate heat. Second, ensure your reflow profile complies with MSL 1 requirements to prevent delamination or voiding. Third, verify that the reduced lead inductance of the SOD-123 doesn’t affect high-frequency noise suppression if used in sensitive analog circuits; sometimes a small series resistor (1–10 Ω) helps dampen oscillations. Finally, confirm mechanical clearance—SOD-123 height (~1.2 mm) is lower than DO-35, which may interfere with conformal coating or enclosure fits. Always prototype and test under full operating conditions.
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DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
MMSZ5237B_R1_00001 CAD Models
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