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Nexperia USA Inc. BZT52H-B56,115
- Part No.:
- BZT52H-B56,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-B56,115.pdf
- Description:
- DIODE ZENER 56V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:8,215
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Product details
Overview
BZT52H-B56,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD123F package, rated for 56 V nominal breakdown voltage at IZ = 2 mA, with 830 mW total power dissipation and 375 mW derated power on standard FR4 PCB, used for precision voltage reference and overvoltage protection in low-power DC rails.
For engineers reviewing the BZT52H-B56,115 datasheet, BZT52H-B56,115 pinout, BZT52H-B56,115 application, or BZT52H-B56,115 equivalent, this part supports stable shunt regulation in space-constrained consumer and industrial power management circuits where ±2 % voltage accuracy and thermal robustness up to 150 °C junction temperature are required.
Technical Context
This Zener diode operates in reverse-biased breakdown mode with a specified 56 V working voltage at 2 mA test current, exhibiting a temperature coefficient of +0.05 mV/K and differential resistance ≤375 Ω - enabling predictable clamping behavior across ambient temperatures from −65 °C to +150 °C.
Its SOD123F package delivers low thermal resistance (Rth(j-a) = 330 K/W in free air; Rth(j-sp) = 70 K/W to cathode solder point), supporting reliable operation under pulsed surge conditions up to 40 W non-repetitive peak reverse power (tp = 100 μs) without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VZ | 54.9 V to 57.1 V at IZ = 2 mA - ensures tight regulation window for 56 V rail stabilization |
| Tolerance | ±2 % - enables accurate voltage reference without post-production trimming |
| Total Power Dissipation Ptot | 830 mW at Tamb ≤ 25 °C - supports continuous operation in compact PCB layouts with minimal heatsinking |
| Differential Resistance rdif | ≤375 Ω - maintains low dynamic impedance for stable regulation under load transients |
| Reverse Current IR | ≤120 μA at VR = 40 V - guarantees low leakage in standby and sleep-mode circuits |
| Junction Temperature Range | −65 °C to +150 °C - suitable for extended-temperature industrial and automotive-adjacent applications |
| Forward Voltage VF | ≤0.9 V at IF = 10 mA - allows use as polarity protection diode in dual-role designs |
Pinout & Package
SOD123F surface-mount plastic package: 2-terminal, flat lead, cathode-marked with bar; dimensions 3.6 mm × 1.7 mm × 1.0 mm; optimized for reflow soldering only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal; carries reverse breakdown current |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes shunt path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Three-tolerance series | ±1 %, ±2 %, and ≈±5 % options - enables cost-performance trade-off selection per design requirement |
| Wide voltage range | 2.4 V to 75 V (E24 standard) - covers most common supply rails without redesigning regulator topology |
| Low thermal resistance | Rth(j-sp) = 70 K/W to cathode solder point - improves thermal coupling to PCB copper, enhancing reliability under sustained load |
| Pulse surge capability | 40 W non-repetitive peak reverse power (tp = 100 μs) - protects downstream circuitry from transient overvoltages such as ESD or inductive kickback |
| Small footprint | SOD123F package (3.6 mm × 1.7 mm) - saves board area in high-density portable and IoT devices |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 56 V reference for feedback loop in isolated flyback converter secondary-side regulation. IC Role / Device Role / Timing Role: Shunt voltage reference connected between optocoupler input and ground, setting precise output voltage threshold. Use Value: ±2 % VZ tolerance and low rdif ensure <1 % output voltage drift across line/load/temperature variations. |
Use Scenario: Protecting microcontroller GPIO pins from 60 V transients induced by relay coil de-energization. IC Role / Device Role / Timing Role: Reverse-biased clamp placed between I/O line and ground, conducting only above 56 V. Use Value: 40 W surge rating and 150 °C Tj limit allow single-device protection without external TVS or RC snubbers. |
| Low-Power Sensor Bias | Industrial Signal Conditioning |
Use Scenario: Generating stable 56 V bias for high-voltage piezoelectric sensor preamplifier stage. IC Role / Device Role / Timing Role: Zener-based current source feeding sensor element, maintaining constant excitation voltage. Use Value: Low 120 μA reverse leakage at 40 V ensures minimal error contribution to ultra-low-current sensor measurements. |
Use Scenario: Regulating auxiliary 56 V rail powering analog front-end of 4–20 mA transmitter in hazardous-area loop-powered design. IC Role / Device Role / Timing Role: Primary shunt regulator establishing clean local supply independent of main loop voltage fluctuations. Use Value: 830 mW continuous dissipation and −65 °C to +150 °C operating range support uncooled operation in wide-temperature field enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-C56,115 | ≈±5 % tolerance (52–60 V range); higher max IR (175 μA at 40 V) | Acceptable where tighter regulation not required; higher leakage may affect ultra-low-power sleep modes | Select when cost sensitivity outweighs voltage accuracy needs and leakage budget permits |
| MMBZ5256BS-7-F | ±5 % tolerance; SOT-23 package; 200 mW Ptot; 56 V VZ at 10 mA | Lower power handling limits use to sub-100 mW applications; smaller footprint but reduced thermal margin | Choose only for ultra-compact designs with verified low power dissipation and adequate PCB copper area |
Compared with BZT52H-B56,115, the C-grade offers wider tolerance and higher leakage at lower cost, while MMBZ5256BS-7-F sacrifices 76 % power capacity and thermal robustness for 30 % smaller footprint - making BZT52H-B56,115 optimal for thermally demanding 56 V regulation where ±2 % accuracy is critical.
Availability
BZT52H-B56,115 is available at Aetrix Electronics and suitable for industrial power supplies, sensor signal conditioning, and overvoltage protection circuits requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for BZT52H-B56,115 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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
BZT52H-B56,115 belongs to the BZT52H series of general-purpose Zener diodes designed specifically for precision voltage regulation and transient suppression in space-constrained, thermally challenging PCB environments.
FAQ
What is the maximum continuous reverse current this Zener can handle at 56 V?
At 56 V reverse bias, the device operates within its specified breakdown region, not as a current-limiting element. Its safe continuous operation depends on power dissipation: with 56 V applied, maximum average current is limited to ~14.8 mA (830 mW ÷ 56 V) at 25 °C ambient. Derating applies per thermal resistance curves.
Can BZT52H-B56,115 be used in place of a 56 V TVS diode for ESD protection?
No - it is not rated for IEC 61000-4-2 ESD immunity. While it clamps at ~56 V, its 40 W non-repetitive surge rating applies only to 100 μs pulses, not the 150 ps rise time of ESD events. Dedicated TVS diodes like PESD5V0S1BA have optimized capacitance and response time for ESD.
How does the ±2 % tolerance affect regulation accuracy in a 56 V power rail?
With ±2 % tolerance, actual VZ falls between 54.9 V and 57.1 V at 2 mA. In a shunt regulator configuration, this directly sets the upper rail limit; combined with differential resistance (≤375 Ω), worst-case output variation across 0–10 mA load change is <1.5 V - sufficient for non-critical 56 V systems.
Is this part qualified for automotive applications?
No - per Nexperia's revision history (Rev. 7, Jan 2023), the BZT52H series is explicitly marked "non-automotive qualification." For automotive use, select the −Q qualified variants (e.g., BZT52H-B56-Q) which undergo AEC-Q200 stress testing and include extended temperature validation.
BZT52H-B56,115 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):
- 56 V
- Tolerance:
- ±2%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 120 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 39.2 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-B56,115 FAQ
1.How can I place an order for BZT52H-B56,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-B56,115 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-B56,115 reliable?
The price and inventory of BZT52H-B56,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52H-B56,115 is usually 5 days.
3.What payment methods are accepted for BZT52H-B56,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-B56,115 transactions.
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4.How is shipping managed for BZT52H-B56,115?
BZT52H-B56,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-B56,115 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-B56,115?
For technical support, including BZT52H-B56,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-B56,115 requirements.
6.How does Aetrix verify that BZT52H-B56,115 is sourced from the original manufacturer or authorized distributors?
All BZT52H-B56,115 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-B56,115 meets industry standards.
7.What is the process for return or replacement of BZT52H-B56,115?
All BZT52H-B56,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-B56,115, 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-B56,115 part is unused and in its original packaging.
Return procedure for BZT52H-B56,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52H-B56,115 Tags
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