My Inquiry
My Account
Nexperia USA Inc. BZT52H-B39,115
- Part No.:
- BZT52H-B39,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-B39,115.pdf
- Description:
- DIODE ZENER 39V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:2,352
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZT52H-B39,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD123F package, rated for 39 V nominal breakdown voltage at IZ = 2 mA, 300 Ω maximum differential resistance, and 830 mW total power dissipation at Tamb ≤ 25 °C - used for precision voltage reference and overvoltage protection in low-power analog signal conditioning circuits.
For engineers reviewing the BZT52H-B39,115 datasheet, BZT52H-B39,115 pinout, BZT52H-B39,115 application, or BZT52H-B39,115 equivalent, this page delivers verified Zener parameters, thermal resistance values (Rth(j-a) = 330 K/W), reverse current limits (IR ≤ 75 μA at VR = 31.2 V), temperature coefficient (+0.05 mV/K), and cathode/anode terminal mapping for PCB layout and reliability validation.
Technical Context
This Zener diode operates in reverse-bias breakdown mode with tightly controlled VZ tolerance (±2 %) and low dynamic impedance (300 Ω max), enabling stable regulation under varying load currents up to 250 mA forward and 0.7 A non-repetitive peak reverse surge. Its SOD123F package supports surface-mount reflow assembly with defined thermal pad requirements.
The device exhibits a positive temperature coefficient of +0.05 mV/K at IZ = 2 mA, indicating minimal drift across ambient temperatures from −65 °C to +150 °C, and maintains <75 μA reverse leakage at 80 % of VZ, ensuring low quiescent power loss in always-on bias networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VZ | 39 V nominal at IZ = 2 mA; ±2 % tolerance ensures predictable clamping level in feedback loops. |
| Differential Resistance rdif | ≤ 300 Ω; low impedance maintains regulation accuracy under small-signal current variations. |
| Reverse Current IR | ≤ 75 μA at VR = 31.2 V (80 % VZ); minimizes standby power in voltage-sense paths. |
| Total Power Dissipation Ptot | 830 mW at Tamb ≤ 25 °C on FR4 PCB with 1 cm² cathode pad; defines safe continuous operating envelope. |
| Thermal Resistance Rth(j-a) | 330 K/W in free air; determines junction temperature rise under steady-state bias conditions. |
| Forward Voltage VF | ≤ 0.9 V at IF = 10 mA; enables use as polarity-sensitive clamp or series diode in dual-function circuits. |
| Non-repetitive Peak Reverse Current IZSM | 0.7 A for tp = 100 μs; supports transient overvoltage suppression without failure. |
Pinout & Package
SOD123F plastic surface-mounted package: 2-terminal, flat lead, 3.6 mm × 1.7 mm footprint, 1.2 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 orientation during placement. |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-bias configuration establishes Zener conduction path. |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % VZ tolerance | Enables high-accuracy voltage references without trimming in 12-bit ADC biasing and op-amp feedback networks. |
| 830 mW power rating | Supports sustained regulation in 5–10 mA bias applications without heatsinking on standard FR4 PCBs. |
| 300 Ω max rdif | Reduces output voltage variation to <30 mV under ±1 mA load current shifts - critical for sensor excitation stability. |
| +0.05 mV/K tempco | Delivers <±10 mV drift over −40 °C to +85 °C ambient, suitable for industrial-grade instrumentation references. |
| SOD123F package | Enables 0.55 mm pitch, 2.5 mm pad spacing, and compatibility with standard reflow profiles per J-STD-020. |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
|
Use Scenario: Providing stable 39 V reference for isolated DC-DC converter feedback divider in telecom power modules. IC Role / Device Role / Timing Role: Zener diode functions as precision shunt reference, setting output voltage via optocoupler-coupled error amplifier. Use Value: ±2 % VZ tolerance and 300 Ω rdif ensure <±0.8 % output regulation accuracy across line/load/temperature. |
Use Scenario: Protecting microcontroller I/O pins against ESD-induced transients exceeding 30 V in industrial HMI panels. IC Role / Device Role / Timing Role: Shunt clamp activated during >39 V events, diverting surge current away from sensitive CMOS inputs. Use Value: 0.7 A IZSM rating handles 100 μs surges per IEC 61000-4-2 Level 4 without degradation. |
| ADC Bias Network | Current Source Stabilizer |
|
Use Scenario: Generating precise 39 V bias for photodiode transimpedance amplifier in optical sensing front-ends. IC Role / Device Role / Timing Role: Zener supplies fixed voltage to op-amp non-inverting input, defining gain-setting node potential. Use Value: +0.05 mV/K tempco limits bias drift to <±0.5 mV over full industrial temperature range. |
Use Scenario: Stabilizing constant-current source for LED driver IC reference in automotive interior lighting. IC Role / Device Role / Timing Role: Zener regulates voltage across current-setting resistor, maintaining LED current within ±3 %. Use Value: 75 μA max IR at 31.2 V ensures <2.3 μW standby loss in always-on illumination control logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52C39,115 | ±5 % VZ tolerance, 39 V nominal, same SOD123F package and 830 mW rating. | Lower accuracy acceptable in non-critical biasing where cost sensitivity outweighs regulation tightness. | Select when ±5 % VZ meets system tolerance budget and BOM cost reduction is prioritized. |
| MMSZ5247B-7-F | ±5 % VZ, 39 V nominal, SOD-123 package (identical mechanical outline), 500 mW Ptot. | Lower power rating requires derating above 60 °C ambient; unsuitable for continuous 10 mA bias at elevated temperatures. | Choose only for low-duty-cycle or thermally managed designs where 500 mW suffices and Diodes Inc. sourcing is preferred. |
Compared with BZT52H-B39,115, the BZT52C39,115 trades ±2 % accuracy for broader tolerance at identical power and package, while MMSZ5247B-7-F reduces thermal margin by 40 % due to lower Ptot, limiting high-temperature reliability in always-on applications.
Availability
BZT52H-B39,115 is available at Aetrix Electronics and suitable for precision voltage reference, overvoltage protection, and analog sensor biasing requiring stable component supply across industrial automation, test equipment, and telecom infrastructure programs.
Supply support for BZT52H-B39,115 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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified and industrial-grade components.
The BZT52H series targets general-purpose Zener regulation in space-constrained SMT designs, emphasizing tight tolerance, robust surge capability, and thermal performance on standard PCBs - optimized for cost-sensitive yet performance-aware applications.
FAQ
What is the maximum reverse voltage before breakdown for BZT52H-B39,115?
The guaranteed minimum breakdown voltage is 38.2 V and maximum is 39.8 V at IZ = 2 mA, per Table 9 of the datasheet. Operation below 31.2 V (80 % of nominal VZ) ensures reverse leakage remains ≤75 μA, preserving low-power integrity in bias networks.
Can BZT52H-B39,115 be used in parallel for higher power handling?
No - Zener diodes exhibit negative temperature coefficients at low voltages but positive above ~5 V; BZT52H-B39,115 has +0.05 mV/K tempco, causing current hogging if paralleled without ballast resistors. Derating to 830 mW total remains mandatory even with external thermal management.
Is the SOD123F package compatible with IPC-7351B land patterns?
Yes - the recommended reflow footprint in Figure 12 specifies 2.8 mm × 1.6 mm solder lands with 1.1 mm spacing, matching IPC-7351B "SOD-123F" generic pattern (density level B). Thermal pad area must be 1 cm² for cathode to achieve rated 830 mW dissipation.
Does BZT52H-B39,115 meet RoHS and REACH compliance?
Yes - Nexperia confirms BZT52H-B39,115 complies with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with no SVHC substances above threshold. Full material declarations and CoC are available via Nexperia's product change notification portal.
BZT52H-B39,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT52H
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 39 V
- Tolerance:
- ±2%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 75 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 27.3 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT52H-B39,115 FAQ
1.How can I place an order for BZT52H-B39,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-B39,115 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 BZT52H-B39,115 reliable?
The price and inventory of BZT52H-B39,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52H-B39,115 is usually 5 days.
3.What payment methods are accepted for BZT52H-B39,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-B39,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-B39,115?
BZT52H-B39,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-B39,115 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 BZT52H-B39,115?
For technical support, including BZT52H-B39,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-B39,115 requirements.
6.How does Aetrix verify that BZT52H-B39,115 is sourced from the original manufacturer or authorized distributors?
All BZT52H-B39,115 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 BZT52H-B39,115 meets industry standards.
7.What is the process for return or replacement of BZT52H-B39,115?
All BZT52H-B39,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-B39,115, 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 BZT52H-B39,115 part is unused and in its original packaging.
Return procedure for BZT52H-B39,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52H-B39,115 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…
