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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Vishay General Semiconductor - Diodes Division BZM55B15-TR

Name: BZM55B15-TR
Brand: Vishay General Semiconductor - Diodes Division
SKU: BZM55B15-TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZM55B15-TR

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Single Zener Diodes

Package:: 2-SMD, No Lead

Datasheet:: BZM55B15-TR.pdf

Description:: DIODE ZENER 15V 500MW MICROMELF

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Product details

Overview

BZM55B15-TR from Vishay Semiconductors is a precision small-signal Zener diode in MicroMELF (SOD-80) package, designed for voltage regulation and reference applications at 15 V nominal Zener voltage with ±0.3 V tolerance, 5 mA test current, and 11 Ω dynamic resistance. It delivers stable reverse breakdown with low leakage (<0.1 μA at VR), high thermal stability (TKVZ = +0.03%/K at 25 °C), and operates up to 175 °C junction temperature.

For engineers reviewing the BZM55B15-TR datasheet, BZM55B15-TR pinout, BZM55B15-TR application, or BZM55B15-TR equivalent, key selection criteria include tight Zener voltage tolerance (±2%), low dynamic impedance, hermetic glass-sealed construction, and compatibility with reflow/wave soldering per J-STD-020 MSL level 1.

Technical Context

The BZM55B15-TR uses a single-junction silicon Zener structure optimized for sharp reverse breakdown and minimal voltage drift over temperature. Its 15 V nominal Zener voltage falls within the positive temperature coefficient range (+0.03%/K at 25 °C), ensuring predictable upward voltage shift with rising junction temperature - critical for biasing and reference circuits requiring monotonic tracking.

Designed for low-noise, high-stability operation, it achieves <0.1 μA reverse leakage at rated VR and maintains <30 Ω dynamic resistance at 5 mA test current. The MicroMELF package provides hermetic sealing and superior thermal performance (RthJL = 300 K/W) compared to plastic SMD alternatives, supporting reliable long-term voltage reference integrity in industrial environments.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	14.7 V min / 15.0 V nom / 15.3 V max at I_ZT = 5 mA - ensures precise 15 V regulation with ±2% tolerance for reference-grade accuracy
Dynamic Resistance (Z_Z)	<30 Ω at I_ZT = 5 mA - minimizes output voltage variation under load transients in feedback or clamp circuits
Reverse Leakage (I_R)	<0.1 μA at V_R - enables ultra-low power standby operation and preserves battery life in always-on monitoring systems
Temperature Coefficient (TKV_Z)	+0.03%/K at 25 °C - provides predictable, monotonic voltage increase with temperature for compensated bias networks
Power Dissipation (P_tot)	500 mW - supports continuous operation at full rating on standard epoxy-glass PCBs with R_thJA ≤ 300 K/W
Junction Temperature (T_j)	–65 °C to +175 °C - enables deployment in under-hood automotive, industrial motor drives, and downhole sensing applications

Pinout & Package

MicroMELF (SOD-80) glass-body package with axial lead configuration: anode and cathode terminals defined by band marking on glass surface. Hermetically sealed, UL 94 V-0 compliant, MSL level 1, weight ≈12 mg.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal	Connected to lower-potential node in reverse-biased Zener configuration; carries forward current up to 200 mA (V_F = 1.5 V)
Cathode	Zener breakdown terminal	Marked end of device; connected to higher-potential node to enable controlled reverse breakdown at 15 V

Key Features

Feature	Design Value
Hermetic glass seal	Prevents moisture ingress and parameter drift over 10+ year field life in humid or corrosive environments
Sharp reverse characteristic	Enables clean clamping and precise voltage threshold detection without soft knee or hysteresis
Low noise performance	Supports analog signal conditioning and precision ADC reference paths where voltage ripple must be minimized
High stability over time and temperature	Guarantees <±2% V_Z shift after 1000 hrs at rated P_tot, critical for unattended instrumentation

Applications

Industrial Power Supply Reference	Automotive Sensor Biasing
Use Scenario: Providing stable 15 V reference for op-amp-based current sense amplifiers in 24 V DC industrial PLC modules. IC Role / Device Role / Timing Role: Zener voltage reference establishing fixed bias point for differential amplifier input stage. Use Value: Tight ±2% V_Z tolerance and +0.03%/K TKV_Z ensure measurement accuracy remains within 0.5% over –40 °C to +125 °C ambient range.	Use Scenario: Biasing Hall-effect position sensors in engine control units exposed to under-hood thermal cycling. IC Role / Device Role / Timing Role: Stable voltage source for sensor excitation, maintaining consistent magnetic field sensitivity across temperature. Use Value: Hermetic MicroMELF construction prevents parameter shift due to thermal stress and humidity, eliminating calibration drift over 15-year vehicle lifetime.
Medical Instrumentation Clamp	Telecom Line Protection
Use Scenario: Overvoltage protection clamp on analog front-end inputs of portable ECG monitors handling ±5 V signal rails. IC Role / Device Role / Timing Role: Fast-acting shunt limiter preventing damage to downstream ADC and amplifier stages during ESD events. Use Value: Low dynamic resistance (<30 Ω) and sharp knee ensure clamping voltage stays within 15.5 V even at 100 mA transient surge, preserving signal integrity.	Use Scenario: Secondary voltage stabilization in isolated DC-DC converter outputs for PoE-powered network switches. IC Role / Device Role / Timing Role: Precision post-regulator trimming component correcting transformer winding tolerance and load-induced droop. Use Value: 500 mW power rating and 175 °C T_j allow continuous operation in thermally constrained 1U chassis with no derating up to 105 °C board temperature.

Industrial Power Supply Reference

Automotive Sensor Biasing

Use Scenario: Providing stable 15 V reference for op-amp-based current sense amplifiers in 24 V DC industrial PLC modules.

IC Role / Device Role / Timing Role: Zener voltage reference establishing fixed bias point for differential amplifier input stage.

Use Value: Tight ±2% V_Z tolerance and +0.03%/K TKV_Z ensure measurement accuracy remains within 0.5% over –40 °C to +125 °C ambient range.

Use Scenario: Biasing Hall-effect position sensors in engine control units exposed to under-hood thermal cycling.

IC Role / Device Role / Timing Role: Stable voltage source for sensor excitation, maintaining consistent magnetic field sensitivity across temperature.

Use Value: Hermetic MicroMELF construction prevents parameter shift due to thermal stress and humidity, eliminating calibration drift over 15-year vehicle lifetime.

Medical Instrumentation Clamp

Telecom Line Protection

Use Scenario: Overvoltage protection clamp on analog front-end inputs of portable ECG monitors handling ±5 V signal rails.

IC Role / Device Role / Timing Role: Fast-acting shunt limiter preventing damage to downstream ADC and amplifier stages during ESD events.

Use Value: Low dynamic resistance (<30 Ω) and sharp knee ensure clamping voltage stays within 15.5 V even at 100 mA transient surge, preserving signal integrity.

Use Scenario: Secondary voltage stabilization in isolated DC-DC converter outputs for PoE-powered network switches.

IC Role / Device Role / Timing Role: Precision post-regulator trimming component correcting transformer winding tolerance and load-induced droop.

Use Value: 500 mW power rating and 175 °C T_j allow continuous operation in thermally constrained 1U chassis with no derating up to 105 °C board temperature.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener diode voltage reference applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX55C15-TR	Plastic SOD-323 package; wider V_Z tolerance (±5%); higher Z_Z (≤40 Ω); MSL level 1 but non-hermetic	Suitable for cost-sensitive consumer electronics where long-term drift and humidity exposure are not critical	Select BZX55C15-TR only when board space is constrained and hermeticity is unnecessary
MMBZ5245B-7-F	SOT-23 package; ±5% V_Z; 150 mW P_tot; higher leakage (≤0.1 μA same, but less stable over time)	Preferred for high-density PCB layouts requiring 3-pin SMT footprint and automated assembly compatibility	Choose MMBZ5245B-7-F only if SOT-23 mounting is mandatory and 500 mW dissipation is not required

Compared with BZM55B15-TR, BZX55C15-TR trades hermetic reliability and tighter tolerance for lower cost and smaller footprint, while MMBZ5245B-7-F sacrifices power handling and long-term stability to fit dense SMT layouts - making BZM55B15-TR the optimal choice for mission-critical industrial and automotive references demanding proven field longevity.

Availability

BZM55B15-TR is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor modules, medical instrumentation, and telecom infrastructure requiring stable component supply with guaranteed long-term continuity.

Supply support for BZM55B15-TR 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

Vishay Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements with emphasis on reliability, precision, and ruggedized packaging.

The BZM55-Series targets high-stability voltage reference and regulation in harsh-environment applications, leveraging hermetic MicroMELF construction to extend operational life beyond plastic-packaged alternatives.

FAQ

What is the Zener voltage tolerance of the BZM55B15-TR?

The BZM55B15-TR has a nominal Zener voltage of 15.0 V with a guaranteed range of 14.7 V to 15.3 V at 5 mA test current, corresponding to ±2% tolerance. This tight specification is achieved through laser-trimmed silicon processing and verified per Vishay's production test flow documented in Rev. 2.3 of datasheet 85597. The BZM55B15-TR maintains this tolerance across its full operating temperature range.

Does the BZM55B15-TR require derating above 25 °C ambient temperature?

Yes - the BZM55B15-TR must be derated linearly above 25 °C ambient per its thermal characteristics: maximum power dissipation decreases by 1.67 mW/°C above 25 °C when mounted on epoxy-glass PCB per Fig. 1 in datasheet 85597. At 75 °C ambient, usable P_tot reduces to 417 mW. Full 500 mW operation is only valid at T_amb ≤ 25 °C with R_thJA ≤ 300 K/W.

Can the BZM55B15-TR be used in place of the BZM55C15 variant?

No - the BZM55B15-TR and BZM55C15 differ in voltage tolerance: BZM55B15-TR is ±2% (14.7–15.3 V), while BZM55C15 is ±5% (13.8–15.6 V). Their electrical characteristics (dynamic resistance, leakage, temperature coefficient) are otherwise identical per datasheet Table 2. Substitution requires validation of system-level tolerance margins; the BZM55B15-TR offers superior precision but at higher cost.

What is the maximum reverse voltage (V_R) at which leakage is specified for the BZM55B15-TR?

The BZM55B15-TR reverse leakage current (I_R) is specified at V_R = 12.0 V - 80% of nominal V_Z - where it is guaranteed ≤0.1 μA at T_j = 25 °C. This value is confirmed in the "ELECTRICAL CHARACTERISTICS" table on page 3 of datasheet 85597. At V_R = 13.5 V (90% V_Z), leakage remains <0.5 μA per typical curves.

Is the BZM55B15-TR compatible with lead-free reflow soldering processes?

Yes - the BZM55B15-TR is qualified for lead-free reflow per J-STD-020, with peak temperature rating up to 260 °C (see "PACKAGE" section, page 1). Its MicroMELF glass body withstands thermal shock without cracking or parameter shift. Recommended profile uses ramp-to-spike with 60–120 sec above 217 °C and peak at 245–260 °C for ≤10 sec, matching IPC-J-STD-020D Class 3 requirements.

BZM55B15-TR Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Series:: BZM55

Package/Case:: 2-SMD, No Lead

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 15 V

Tolerance:: -

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 110 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 11 V

Voltage - Forward (Vf) (Max) @ If:: 1.5 V @ 200 mA

Operating Temperature:: -65°C ~ 175°C

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: MicroMELF

BZM55B15-TR FAQ

1.How can I place an order for BZM55B15-TR through Aetrix?

Please submit a Request for Quotation (RFQ) for BZM55B15-TR 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 BZM55B15-TR reliable?

The price and inventory of BZM55B15-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZM55B15-TR is usually 5 days.

3.What payment methods are accepted for BZM55B15-TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZM55B15-TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZM55B15-TR?

BZM55B15-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZM55B15-TR 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 BZM55B15-TR?

For technical support, including BZM55B15-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZM55B15-TR requirements.

6.How does Aetrix verify that BZM55B15-TR is sourced from the original manufacturer or authorized distributors?

All BZM55B15-TR 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 BZM55B15-TR meets industry standards.

7.What is the process for return or replacement of BZM55B15-TR?

All BZM55B15-TR units undergo pre-shipment inspection (PSI). If there is an issue with BZM55B15-TR, 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 BZM55B15-TR part is unused and in its original packaging.

Return procedure for BZM55B15-TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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