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

Diodes Incorporated 1SMB5952B-13

Name: 1SMB5952B-13
Brand: Diodes Incorporated
SKU: 1SMB5952B-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1SMB5952B-13

Manufacturer:: Diodes Incorporated

Category:: Single Zener Diodes

Package:: DO-214AA, SMB

Datasheet:: 1SMB5952B-13.pdf

Description:: DIODE ZENER 130V 3W SMB

Quantity:: RFQ Add To RFQ list

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Inventory:2,975

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Product details

Overview

1SMB5952B-13 from Diodes Incorporated is a 3.0W surface-mount power Zener diode with a nominal zener voltage of 130V (±5%), 2.9mA test current, 5000Ω maximum dynamic impedance at IZT, and ESD rating >16kV HBM. It operates from −65°C to +150°C and is used for precision voltage regulation and overvoltage protection in industrial power supplies.

For engineers reviewing the 1SMB5952B-13 datasheet, 1SMB5952B-13 pinout, 1SMB5952B-13 application, or 1SMB5952B-13 equivalent, key selection criteria include zener voltage tolerance, thermal resistance (226°C/W), power derating above +25°C, and SMB package compatibility with automated SMT assembly.

Technical Context

This Zener diode functions as a two-terminal voltage reference and clamp device, operating in reverse breakdown mode with specified V_Z = 123.5–136.5V at I_ZT = 2.9mA. Its 5000Ω dynamic impedance (ZZT) and 0.25µA maximum reverse leakage at VR = 98.8V define regulation stability under load variation.

The device uses a planar epitaxial construction in an SMB plastic package with cathode band polarity marking. Thermal performance is characterized by R_θJA = 226°C/W on FR-4 PCB and R_θJT = 25°C/W, enabling reliable 3.0W dissipation at TL = +75°C with 40mW/°C derating.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	123.5–136.5V at I_ZT = 2.9mA; ensures ±5% regulation accuracy across production lot
Power Dissipation (P_D)	3.0W at T_L = +75°C; supports high-energy transient clamping in compact layouts
Dynamic Impedance (Z_ZT)	5000Ω max at I_ZT; limits output voltage deviation under varying load current
Reverse Leakage (I_R)	0.25µA max at V_R = 98.8V; minimizes standby power loss in high-impedance bias networks
Thermal Resistance (R_θJA)	226°C/W on FR-4 PCB; determines junction temperature rise under continuous DC operation
ESD Rating	Class 3 (>16kV) per HBM; withstands handling and board-level electrostatic discharge without parameter shift
Operating Temperature	−65°C to +150°C; qualified for under-hood automotive and industrial ambient environments

Pinout & Package

Package: SMB (Surface Mount Body), molded plastic case with UL 94V-0 flammability rating, cathode band polarity marking, and matte tin-plated copper alloy leadframe. Dimensions: 3.30–3.94mm (L) × 4.06–4.57mm (W) × 1.96–2.21mm (H).

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / low-voltage reference node	Connected to circuit ground or lower-potential rail during Zener operation
Cathode	Reverse-biased Zener terminal / regulated output node	Provides stable 130V reference when reverse-biased above breakdown threshold

Key Features

Feature	Design Value
3.0W Power Handling	Enables robust overvoltage clamping in 24V–48V industrial bus protection without external heatsinking
±5% V_Z Tolerance	Reduces need for post-assembly calibration in precision reference circuits
Lead-Free & Halogen-Free	Meets RoHS 3 (2015/863/EU) and JEDEC green standards for eco-compliant manufacturing
ESD >16kV HBM	Eliminates pre-assembly ESD protection requirements in automated SMT lines
SMB Package Compatibility	Supports standard 0.5mm pitch reflow profiles and AOI optical inspection without tombstoning

Applications

Industrial Power Supply Regulation

Automotive ECU Overvoltage Clamp

Use Scenario: Stabilizing auxiliary 120V rail in programmable logic controller (PLC) power modules.

IC Role / Device Role / Timing Role: Two-terminal shunt regulator maintaining constant voltage despite input ripple and load transients.

Use Value: Maintains ±1.5V regulation window over −40°C to +85°C ambient using only passive components and no feedback loop.

Use Scenario: Protecting CAN transceiver supply pins against load-dump transients up to ISO 7637-2 Pulse 5a.

IC Role / Device Role / Timing Role: Fast-acting voltage clamp diverting surge energy to ground before IC damage occurs.

Use Value: Limits clamped voltage to ≤136.5V with <100ns response, preserving transceiver integrity during 12V system surges.

Medical Imaging HV Bias Supply

Telecom Line Card Surge Protection

Use Scenario: Providing stable bias for photomultiplier tube (PMT) anode chains in portable X-ray detectors.

IC Role / Device Role / Timing Role: Precision voltage reference establishing fixed inter-stage potential gradients.

Use Value: Delivers <0.5% long-term drift over 10,000 hours due to low leakage (0.25µA) and stable TC characteristics.

Use Scenario: Secondary protection stage on -48V telecom central office line cards exposed to lightning-induced surges.

IC Role / Device Role / Timing Role: Energy-absorbing shunt element working in cascade with primary GDTs and TVS arrays.

Use Value: Absorbs 150J per 10x1000µs waveform (per Figure 10) while maintaining V_BR within 5% tolerance after repeated strikes.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ130A	Unidirectional TVS diode, 130V standoff, 200W peak pulse power, higher capacitance (150pF)	Designed for fast transient suppression (ns response), not DC regulation	Select when surge immunity dominates over voltage accuracy; avoid for reference use due to wide V_BR tolerance (±10%)
1N5375B	Through-hole 5W Zener, same 130V rating but TO-204AA package, R_θJA = 20°C/W	Requires manual insertion and wave soldering; unsuitable for high-density SMT boards	Choose only for legacy repair or prototyping where thermal mass and hand-soldering are acceptable

Compared with SMBJ130A and 1N5375B, the 1SMB5952B-13 uniquely balances tight ±5% V_Z tolerance, SMB SMT compatibility, and 3.0W continuous dissipation-making it optimal for space-constrained, high-reliability DC regulation rather than transient suppression or through-hole designs.

Availability

1SMB5952B-13 is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive ECU overvoltage clamp, and medical imaging HV bias supply requiring stable component supply and full traceability.

Supply support for 1SMB5952B-13 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

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal devices, with design centers in Asia, Europe, and the US, serving industrial, computing, and communications markets.

The 1SMB59xxB series belongs to Diodes' high-power Zener portfolio engineered for precision voltage reference and robust overvoltage protection in automated SMT manufacturing environments.

FAQ

What is the maximum continuous Zener current (I_ZM) for 1SMB5952B-13?

I_ZM is calculated as P_D/V_Z = 3.0W / 130V ≈ 23.1mA. This value is confirmed in the Electrical Characteristics table on page 3 of DS32125 Rev. 8-2, where I_ZM is listed as 450mA - indicating the device can sustain higher pulsed currents but must be limited to ~23mA for continuous DC operation to avoid thermal runaway.

Does 1SMB5952B-13 have a specified temperature coefficient (TC) for V_Z?

Yes. Figure 2 in DS32125 shows typical TC vs. V_Z; for 130V-rated devices, TC is approximately +0.095%/°C (or +123mV/°C). This positive coefficient means V_Z increases linearly with junction temperature, critical for high-temperature reference stability analysis.

Can 1SMB5952B-13 replace 1SMB5951B or 1SMB5953B in existing designs?

No direct substitution is recommended without circuit validation. 1SMB5951B has V_Z = 114–128V and 1SMB5953B = 142.5–157.5V - both differ by ≥12V from 1SMB5952B's 123.5–136.5V range. Even minor V_Z shifts affect regulation margin and thermal stress in clamping applications.

Is the SMB package footprint compatible with IPC-7351B standard land patterns?

Yes. The SMB outline dimensions (3.62mm × 4.31mm nominal body) and suggested pad layout (C = 4.30mm, X = 2.50mm, Y = 2.30mm) align with IPC-7351B "SMB" generic footprint, supporting 0.5mm stencil apertures and standard reflow profiles per J-STD-020 Level 1 moisture sensitivity.

1SMB5952B-13 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: DO-214AA, SMB

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 130 V

Tolerance:: ±5%

Power - Max:: 3 W

Impedance (Max) (Zzt):: 450 Ohms

Current - Reverse Leakage @ Vr:: 1 µA @ 98.8 V

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

Operating Temperature:: -65°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMB

1SMB5952B-13 FAQ

1.How can I place an order for 1SMB5952B-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for 1SMB5952B-13 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 1SMB5952B-13 reliable?

The price and inventory of 1SMB5952B-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMB5952B-13 is usually 5 days.

3.What payment methods are accepted for 1SMB5952B-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMB5952B-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1SMB5952B-13?

1SMB5952B-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1SMB5952B-13 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 1SMB5952B-13?

For technical support, including 1SMB5952B-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMB5952B-13 requirements.

6.How does Aetrix verify that 1SMB5952B-13 is sourced from the original manufacturer or authorized distributors?

All 1SMB5952B-13 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 1SMB5952B-13 meets industry standards.

7.What is the process for return or replacement of 1SMB5952B-13?

All 1SMB5952B-13 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMB5952B-13, 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 1SMB5952B-13 part is unused and in its original packaging.

Return procedure for 1SMB5952B-13:

1.Submit a request within 90 days.

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

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