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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Zener Diode Arrays

Diodes Incorporated MMBZ5235BS-7-F

Name: MMBZ5235BS-7-F
Brand: Diodes Incorporated
SKU: MMBZ5235BS-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMBZ5235BS-7-F

Manufacturer:: Diodes Incorporated

Category:: Zener Diode Arrays

Package:: 6-TSSOP, SC-88, SOT-363

Datasheet:: MMBZ5235BS-7-F.pdf

Description:: DIODE ZENER ARRAY 6.8V SOT363

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Product details

Overview

MMBZ5235BS-7-F from Diodes Incorporated is a dual isolated 200 mW surface-mount Zener diode in SOT-363 package, with nominal zener voltage 6.8 V (min 6.46 V, max 7.14 V) at 20 mA test current, 5 Ω zener impedance at I_ZT, and 3.0 μA reverse leakage at 5.0 V. It serves as precision voltage reference and overvoltage clamp in low-power analog signal conditioning circuits.

For engineers reviewing the MMBZ5235BS-7-F datasheet, MMBZ5235BS-7-F pinout, MMBZ5235BS-7-F application, or MMBZ5235BS-7-F equivalent, key selection criteria include zener voltage tolerance, dynamic impedance at operating current, thermal resistance (625 °C/W), and dual-diode isolation for bidirectional clamping or dual-rail reference use.

Technical Context

This device integrates two electrically isolated Zener diodes in a single SOT-363 package, enabling symmetrical voltage clamping or independent reference generation without cross-coupling. Its planar die construction ensures stable breakdown characteristics across temperature (-65 to +150 °C) and long-term reliability under pulsed stress.

Designed for automated SMT assembly, it uses matte tin-plated Alloy 42 leads and meets RoHS and Diodes Inc.'s "Green" policy requirements (halogen-free molding compound for date codes UO and newer). Moisture sensitivity level is rated Class 1 per J-STD-020D.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	6.8 V nominal, 6.46–7.14 V range at 20 mA - defines stable regulation point for low-current biasing
Zener Impedance (Z_ZT)	5 Ω at I_ZT = 20 mA - ensures minimal output voltage shift under load variation
Reverse Leakage (I_R)	3.0 μA at V_R = 5.0 V - enables low-error reference in high-impedance feedback networks
Power Dissipation (P_D)	200 mW at T_A = 25 °C - limits continuous clamping energy in compact PCB layouts
Thermal Resistance (R_θJA)	625 °C/W on FR4 board - determines safe derating above ambient (see Fig. 1)
Operating Temperature	-65 to +150 °C - supports industrial and automotive under-hood sensor interface designs

Pinout & Package

Package: SOT-363 (dual-isolated Zener pair in ultra-small 6-pin surface-mount outline; dimensions per Diodes Inc. drawing: 2.20 × 1.35 × 0.95 mm).

Pin/Terminal	Circuit Role	Design Meaning
C1	Anode of Diode 1	Connects to cathode of external series resistor for forward-biased Zener operation
A1	Cathode of Diode 1	Primary regulation node; ties to reference point requiring stable 6.8 V
C2	Anode of Diode 2	Enables independent second Zener path; electrically isolated from Diode 1
A2	Cathode of Diode 2	Provides second regulated node or bidirectional clamping when paired with C1/A1
NC	No Connect	Internally unconnected pin; must remain floating per datasheet
NC	No Connect	Second internally unconnected pin; no routing or soldering required

Key Features

Feature	Design Value
Dual isolated Zener structure	Enables independent voltage references or symmetrical ±clamping without shared substrate leakage
200 mW power rating	Supports sustained regulation in space-constrained IoT sensor nodes and portable battery monitors
5 Ω dynamic impedance	Maintains <±10 mV regulation error across ±2 mA load current swings at 20 mA bias
SOT-363 footprint	Reduces PCB area by >60% vs. discrete SO-8 dual-Zener solutions while preserving thermal performance
RoHS/Green compliant	Meets IPC-J-STD-609A Class 1 halogen-free requirements for automotive and medical end equipment

Applications

Industrial Sensor Signal Conditioning

USB Port ESD Clamp

Use Scenario: Stabilizing excitation voltage for 4–20 mA loop-powered pressure transmitters.

IC Role / Device Role / Timing Role: Dual-Zener provides isolated 6.8 V reference for op-amp biasing and 5.0 V clamp for ADC input protection.

Use Value: Prevents sensor output drift due to supply ripple while blocking transient-induced ADC saturation.

Use Scenario: Protecting USB 2.0 D+ and D− lines against ±8 kV contact ESD per IEC 61000-4-2.

IC Role / Device Role / Timing Role: Bidirectional clamping using A1/C1 and A2/C2 pairs to shunt fast transients to ground.

Use Value: Limits line voltage to <±6.8 V during ESD event, preserving PHY integrity without adding capacitance >10 pF.

Low-Power MCU Reset Circuit

Automotive Cabin Control Panel

Use Scenario: Generating clean reset threshold for ARM Cortex-M0+ microcontrollers operating at 3.3 V.

IC Role / Device Role / Timing Role: Zener diode forms precision voltage divider with resistor to trigger reset IC at 2.8 V.

Use Value: Achieves ±1.5% reset threshold accuracy over -40 to +85 °C, exceeding standard reset IC tolerance.

Use Scenario: Regulating backlight LED driver bias in infotainment display modules.

IC Role / Device Role / Timing Role: Provides stable 6.8 V reference for current-sense amplifier in constant-current LED string control.

Use Value: Maintains ±2% LED brightness uniformity across 12 V battery fluctuations (9–16 V range).

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84-C6V8LT1G	Single Zener, SOT-23, 6.8 V ±5%, Z_ZT = 10 Ω, P_D = 300 mW	Lacks dual isolation; requires two devices for same functionality	Select when board area is unconstrained and dual-diode isolation is unnecessary
MMBZ5235B-7-F	Same electrical specs but in SOT-23-3 (single Zener); no dual-diode capability	Cannot perform bidirectional clamping or independent reference generation	Choose only if design uses only one Zener and requires lower cost per unit

Compared with BZX84-C6V8LT1G and MMBZ5235B-7-F, MMBZ5235BS-7-F uniquely delivers dual isolated Zener functionality in a single SOT-363 footprint-reducing component count by 50% and eliminating inter-device parameter mismatch in precision clamping applications.

Availability

MMBZ5235BS-7-F is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB port protection circuits, low-power MCU reset systems, and automotive cabin control panels requiring stable component supply and consistent parametric performance across production batches.

Supply support for MMBZ5235BS-7-F 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 manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and the Philippines.

This device belongs to the MMBZ52xxBS dual-Zener family, engineered specifically for space-constrained, high-reliability voltage reference and transient suppression in portable and automotive electronics.

FAQ

What is the maximum continuous reverse voltage that can be applied before breakdown?

The nominal zener voltage is 6.8 V with a tolerance band of 6.46–7.14 V at 20 mA test current. Breakdown occurs within this range under DC conditions; applying >7.14 V continuously exceeds specification and risks parametric shift or thermal runaway. Derating is required above 25 °C ambient per Fig. 1.

How does the dual-isolation architecture affect circuit layout?

The two Zener diodes share no internal substrate connection, allowing independent anode/cathode routing without leakage coupling. Layout must maintain ≥0.2 mm clearance between C1/A1 and C2/A2 traces to preserve isolation integrity, especially in high-impedance reference paths.

Can this device replace a single Zener diode in existing designs?

Yes, but only one diode (e.g., A1/C1) should be used while leaving C2/A2 unconnected; the second diode remains inactive. Pin compatibility with SOT-363 footprints allows drop-in replacement, though unused pins must remain unconnected per datasheet guidance.

What is the typical junction-to-ambient thermal resistance on standard FR4?

R_θJA is 625 °C/W when mounted on FR4 with Diodes Inc.'s recommended pad layout (document AP02001.pdf). This value assumes 1-inch² copper pour; reducing copper area increases thermal resistance linearly-e.g., 0.25-inch² raises R_θJA to ~950 °C/W.

MMBZ5235BS-7-F Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 6-TSSOP, SC-88, SOT-363

Packaging:: Tape & Reel (TR)

Product Status:: Active

Configuration:: 2 Independent

Voltage - Zener (Nom) (Vz):: 6.8 V

Tolerance:: ±5%

Power - Max:: 200 mW

Impedance (Max) (Zzt):: 5 Ohms

Current - Reverse Leakage @ Vr:: 3 µA @ 5 V

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: -65°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-363

MMBZ5235BS-7-F FAQ

1.How can I place an order for MMBZ5235BS-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for MMBZ5235BS-7-F 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 MMBZ5235BS-7-F reliable?

The price and inventory of MMBZ5235BS-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5235BS-7-F is usually 5 days.

3.What payment methods are accepted for MMBZ5235BS-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5235BS-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMBZ5235BS-7-F?

MMBZ5235BS-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMBZ5235BS-7-F 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 MMBZ5235BS-7-F?

For technical support, including MMBZ5235BS-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5235BS-7-F requirements.

6.How does Aetrix verify that MMBZ5235BS-7-F is sourced from the original manufacturer or authorized distributors?

All MMBZ5235BS-7-F 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 MMBZ5235BS-7-F meets industry standards.

7.What is the process for return or replacement of MMBZ5235BS-7-F?

All MMBZ5235BS-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5235BS-7-F, 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 MMBZ5235BS-7-F part is unused and in its original packaging.

Return procedure for MMBZ5235BS-7-F:

1.Submit a request within 90 days.

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

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