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Nexperia USA Inc. BZT52H-A36X
- Part No.:
- BZT52H-A36X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-A36X.pdf
- Description:
- DIODE ZENER 36V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:9,285
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Product details
Overview
BZT52H-A36X from Nexperia is a ±1 % tolerance Zener diode in SOD123F package, rated for 36 V nominal breakdown voltage at IZ = 2 mA, with 830 mW total power dissipation and 250 mA maximum forward current. It serves as a precision voltage reference or shunt regulator in low-power supply rails and signal-level clamping circuits.
For engineers reviewing the BZT52H-A36X datasheet, BZT52H-A36X pinout, BZT52H-A36X application, or BZT52H-A36X equivalent, key selection criteria include its tight ±1 % VZ tolerance, low 250 Ω differential resistance at 2 mA, 0.9 V forward voltage at 10 mA, thermal resistance of 150 K/W (junction-to-solder point), and suitability for surface-mounted designs requiring stable regulation below 40 V.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a stable reference voltage across its terminals under varying load or input conditions. Its temperature coefficient of +0.05 mV/K at IZ = 2 mA ensures minimal drift over ambient temperature ranges from −65 °C to +150 °C.
The device features a low 45 pF junction capacitance at 0 V (f = 1 MHz) and supports non-repetitive peak reverse currents up to 0.8 A (tp = 100 μs), enabling transient suppression in conjunction with primary regulation stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VZ | 35.64 V to 36.36 V at IZ = 2 mA - defines precise regulation threshold for feedback or reference use |
| Tolerance | ±1 % - enables high-accuracy voltage setting without post-calibration trimming |
| Differential Resistance rdif | 250 Ω max at IZ = 2 mA - determines output impedance and load regulation sensitivity |
| Total Power Dissipation Ptot | 830 mW at Tamb ≤ 25 °C on FR4 PCB with 1 cm² cathode pad - sets thermal derating envelope |
| Forward Voltage VF | 0.9 V max at IF = 10 mA - impacts conduction loss during forward bias or ESD protection paths |
| Junction-to-Solder-Point Rth(j-sp) | 150 K/W - informs thermal design margin when mounted on standard PCB copper |
| Reverse Current IR | 60 μA max at VR = 28.8 V - defines leakage-induced error in high-impedance reference nodes |
Pinout & Package
SOD123F is a small-outline, flat-lead, surface-mount plastic package measuring 3.6 mm × 1.7 mm × 1.0 mm (L × W × H), optimized for automated placement and reflow soldering on FR4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Marked side) | Cathode (K) | Connected to regulated output node; polarity indicator via marking bar; carries reverse current during regulation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes Zener conduction path during breakdown operation |
Key Features
| Feature | Design Value |
|---|---|
| High-precision voltage reference | ±1 % VZ tolerance enables direct use in 12-bit ADC references without trimming |
| Low thermal resistance | 150 K/W junction-to-solder-point allows >600 mW usable power at 70 °C ambient on standard layout |
| Controlled temperature coefficient | +0.05 mV/K minimizes drift to <±10 mV over −40 °C to +85 °C operating range |
| Robust surge handling | 0.8 A non-repetitive peak reverse current supports IEC 61000-4-5 level 3 surge immunity when used with series impedance |
| Compact SMD footprint | SOD123F outline (3.6 mm × 1.7 mm) saves >40 % board area vs. DO-35 through-hole equivalents |
Applications
| Power Supply Reference | Signal-Level Clamp |
|---|---|
|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter secondary-side TL431-based regulation. IC Role / Device Role / Timing Role: Shunt reference providing fixed 36 V threshold to control optocoupler LED current. Use Value: ±1 % VZ tolerance reduces output voltage variation to ±0.36 V, eliminating need for potentiometer adjustment. |
Use Scenario: Protecting microcontroller GPIO pins from overvoltage transients on industrial sensor interfaces. IC Role / Device Role / Timing Role: Bidirectional clamp limiting input swing to 36 V above GND and 0.9 V below GND. Use Value: 0.9 V forward drop ensures fast turn-on during negative excursions, while 36 V reverse rating covers common 24 V field bus surges. |
| ADC Voltage Reference | Current Source Bias |
|
Use Scenario: Providing stable reference for 12-bit SAR ADC in battery-powered environmental monitoring node. IC Role / Device Role / Timing Role: Low-drift Zener source feeding resistive divider to generate 3.3 V reference from 36 V rail. Use Value: +0.05 mV/K tempco contributes <±0.5 LSB error over full temperature range, meeting system accuracy budget. |
Use Scenario: Setting constant current for LED driver bias in optical encoder module. IC Role / Device Role / Timing Role: Series-shunt regulator establishing 36 V headroom across current-setting resistor. Use Value: 250 Ω differential resistance ensures <±1.5 % current variation across 10–100 mA load range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-B36X | ±2 % VZ tolerance; identical package, thermal, and electrical specs otherwise | Acceptable where ±0.72 V regulation error is permissible (e.g., non-critical biasing) | Select for cost-sensitive designs where tighter tolerance is unnecessary |
| MMSZ5245B | ±5 % tolerance; SOD-123 package (not SOD123F); 500 mW Ptot; higher rdif (350 Ω) | Limited to lower-accuracy, lower-power applications due to looser tolerance and reduced power rating | Use only if legacy compatibility or distributor stock dictates; verify thermal margin on PCB |
Compared with BZT52H-A36X, the BZT52H-B36X trades ±1 % precision for lower unit cost while retaining identical thermal and surge performance, whereas MMSZ5245B requires layout adaptation and delivers inferior regulation stability and power capability.
Availability
BZT52H-A36X is available at Aetrix Electronics and suitable for industrial power supplies, sensor interface protection, precision analog reference circuits, and embedded system voltage supervision requiring stable component supply and traceable sourcing.
Supply support for BZT52H-A36X 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 logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.
The BZT52H series belongs to Nexperia's general-purpose Zener diode product line, engineered for reliable voltage regulation and clamping in space-constrained, cost-sensitive SMD applications across industrial and computing systems.
FAQ
What is the maximum continuous reverse current this Zener can handle at 36 V?
The BZT52H-A36X is not rated for continuous reverse current at full VZ. Its maximum steady-state reverse current is limited by thermal dissipation: at 36 V, safe continuous current is ~23 mA (830 mW ÷ 36 V), assuming ideal heatsinking. Derating is required above 25 °C ambient per the 150 K/W Rth(j-sp) value.
Can this diode be used in place of a 33 V Zener for overvoltage protection?
No - BZT52H-A36X has a nominal 36 V breakdown and will not conduct significantly below ~34 V. Substituting it for a 33 V Zener risks delayed clamping, allowing transient voltages to exceed safe limits for downstream 3.3 V or 5 V ICs. Use BZT52H-A33X (33 V) or BZT52H-B33X for that function.
Does the SOD123F package support hand soldering with hot air?
Yes - the SOD123F package is compatible with hot-air rework tools using standard lead-free reflow profiles (peak 260 °C, 30–60 s above 217 °C). Its flat leads and thermal mass allow reliable joint formation without tombstoning, provided solder paste volume and preheat ramp rates follow Nexperia's recommended footprint (Fig. 12).
How does the ±1 % tolerance affect regulation accuracy in a 12-bit system?
At 36 V nominal, ±1 % tolerance equals ±0.36 V absolute error. When scaled to a 3.3 V ADC reference derived from this Zener, that translates to ±11.7 LSB error - within acceptable bounds for many 12-bit measurement systems where other sources (resistor matching, op-amp offset) dominate total error.
BZT52H-A36X 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):
- 36 V
- Tolerance:
- ±1%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 25.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT52H-A36X FAQ
1.How can I place an order for BZT52H-A36X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-A36X 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-A36X reliable?
The price and inventory of BZT52H-A36X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52H-A36X is usually 5 days.
3.What payment methods are accepted for BZT52H-A36X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-A36X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-A36X?
BZT52H-A36X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-A36X 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-A36X?
For technical support, including BZT52H-A36X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-A36X requirements.
6.How does Aetrix verify that BZT52H-A36X is sourced from the original manufacturer or authorized distributors?
All BZT52H-A36X 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-A36X meets industry standards.
7.What is the process for return or replacement of BZT52H-A36X?
All BZT52H-A36X units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-A36X, 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-A36X part is unused and in its original packaging.
Return procedure for BZT52H-A36X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52H-A36X Tags
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MMSZ5231B-7-F
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MM5Z5V1ST1G
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