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Diodes Incorporated BZX84C27S-7-F
- Part No.:
- BZX84C27S-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Zener Diode Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
BZX84C27S-7-F.pdf
- Description:
- DIODE ZENER ARRAY 27V SOT363
- Quantity:
- Payment:
- Shipping:
Inventory:4,387
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Product details
Overview
BZX84C27S-7-F from Diodes Incorporated is a dual 200 mW surface-mount Zener diode in SOT-363 package, rated for nominal zener voltage 27 V (min 25.1 V, max 28.9 V) at test current 2.0 mA, with maximum zener impedance 80 Ω at IZT and 300 Ω at IZK, used for precision voltage regulation and overvoltage protection in compact DC power rails.
For engineers reviewing the BZX84C27S-7-F datasheet, BZX84C27S-7-F pinout, BZX84C27S-7-F application, or BZX84C27S-7-F equivalent, key selection criteria include zener voltage tolerance (±7%), low leakage (<0.1 µA @ 18.9 V), thermal resistance (625 °C/W), and dual-diode configuration enabling bidirectional clamping or dual-rail reference in space-constrained designs.
Technical Context
This dual Zener diode integrates two independent 27 V zener elements in a single SOT-363 package, sharing no internal connection - terminals C1/A1 and C2/A2 form two isolated anode-cathode pairs. Each diode operates with specified reverse breakdown at 2.0 mA test current and exhibits temperature coefficient of +21.4 to +25.3 mV/°C.
It delivers stable regulation under low-current conditions (IZK = 0.5 mA), supports ultra-low reverse leakage (IR ≤ 0.1 µA at VR = 18.9 V), and maintains defined impedance characteristics up to 1 kHz, making it suitable for feedback sensing, voltage reference buffering, and transient suppression where dual-channel symmetry is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 27 V - precise regulation point at 2.0 mA, ±7% tolerance ensures predictable clamping in 24 V system rails. |
| Power Dissipation | 200 mW - limits continuous dissipation on FR4 PCB with recommended pad layout; derates linearly above 25°C ambient. |
| Zener Impedance | 80 Ω @ IZT, 300 Ω @ IZK - defines voltage stability under varying load current; critical for reference accuracy in feedback loops. |
| Reverse Leakage | ≤0.1 µA @ 18.9 V - enables low-power standby operation without significant quiescent current draw. |
| Thermal Resistance | 625 °C/W - determines junction temperature rise per mW; requires thermal-aware layout for sustained 200 mW operation. |
| Temperature Coefficient | +21.4 to +25.3 mV/°C - quantifies zener voltage drift with temperature; informs compensation design in precision references. |
Pinout & Package
SOT-363 plastic surface-mount package (2.2 mm × 1.3 mm × 0.9 mm), UL 94V-0 rated, moisture sensitivity level 1, lead-free matte tin plating over Alloy 42 leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C1 | Cathode of Diode 1 | Connected to regulated rail or reference node; reverse-biased during zener operation. |
| A1 | Anode of Diode 1 | Common return path for first zener element; tied to ground or bias source. |
| A2 | Anode of Diode 2 | Independent return for second zener; enables dual-rail or differential clamping topologies. |
| C2 | Cathode of Diode 2 | Second regulated output node; electrically isolated from C1 and A1. |
| NC | No Connect | Internally unconnected terminal; must remain floating per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent Zener elements | Enables two separate 27 V regulation paths in one footprint - reduces board area vs. discrete dual-SOT23 solution. |
| 200 mW total power rating | Supports moderate-current regulation without external heat sinking on standard FR4 layouts. |
| Low leakage current (≤0.1 µA) | Minimizes standby power loss in battery-backed or energy-harvesting circuits. |
| Lead-free and RoHS-compliant | Meets global environmental compliance requirements without performance trade-offs. |
Applications
| Industrial Sensor Signal Conditioning | USB-C Power Delivery Clamp |
|---|---|
Use Scenario: Protecting analog front-end inputs of 24 V industrial sensors against ESD and supply transients. IC Role / Device Role / Timing Role: Dual Zener provides symmetrical ±27 V clamping across differential signal pair while maintaining common-mode reference. Use Value: Prevents op-amp input damage without adding series resistance that degrades signal bandwidth. | Use Scenario: Clamping CC1/CC2 lines in USB-C PD controllers during hot-plug events. IC Role / Device Role / Timing Role: Fast-acting voltage limiter referenced to VCONN or ground, leveraging low-capacitance dual structure. Use Value: Meets USB-IF ESD immunity requirements (±15 kV air, ±8 kV contact) with minimal signal distortion. |
| Programmable Logic Controller I/O Protection | Dual-Rail Microcontroller Reference |
Use Scenario: Safeguarding 24 V digital input modules against field-wiring faults and inductive kickback. IC Role / Device Role / Timing Role: Zener pair shunts overvoltage to ground or supply rail depending on polarity, acting as passive crowbar. Use Value: Eliminates need for external TVS arrays while maintaining tight voltage threshold control. | Use Scenario: Generating matched positive/negative reference voltages for ADC/DAC in low-power MCU systems. IC Role / Device Role / Timing Role: Two independent 27 V Zeners biased at 2 mA provide stable nodes for resistor-divider scaling to 3.3 V or 5 V. Use Value: Achieves <±0.5% matching between rails due to monolithic die construction and shared thermal environment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5256BS-7-F | Single 27 V Zener, SOT-363, same 200 mW rating but only one element. | Requires two devices for dual-rail use; higher assembly cost and larger footprint. | Select when only one regulated node is needed or board layout allows duplication. |
| BZX84C27LT1G | Single 27 V Zener in SOT-23, 350 mW rating, higher power but no dual functionality. | Lacks second Zener; unsuitable for differential or dual-reference designs. | Choose for higher-power single-rail regulation where thermal margin is critical. |
Compared with MMBZ5256BS-7-F and BZX84C27LT1G, BZX84C27S-7-F uniquely delivers matched dual 27 V regulation in one SOT-363, reducing component count and improving thermal tracking - essential for precision dual-rail biasing and symmetrical clamping.
Availability
BZX84C27S-7-F is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB-C power delivery protection, PLC I/O modules, and dual-rail microcontroller reference designs requiring stable component supply and long-term manufacturability.
Supply support for BZX84C27S-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, specializing in high-reliability, industry-standard components for power management, signal integrity, and protection.
BZX84C27S-7-F belongs to the BZX84C series of dual Zener diodes designed specifically for space-constrained voltage regulation and bidirectional overvoltage protection in consumer, industrial, and communications equipment.
FAQ
What is the maximum reverse voltage this device can withstand before breakdown?
The BZX84C27S-7-F has a nominal zener voltage of 27 V with a guaranteed range of 25.1 V to 28.9 V at 2.0 mA test current. Its absolute maximum reverse voltage is not specified separately - operation beyond the upper limit (28.9 V) risks exceeding power dissipation limits and thermal runaway under sustained bias.
Can both Zener diodes be used simultaneously with shared cathodes?
No - the device contains two fully isolated Zener diodes (C1/A1 and C2/A2). There is no internal connection between cathodes or anodes. Shared cathode operation would require external wiring and violates the intended dual-independent topology; doing so may cause uneven current sharing and thermal imbalance.
Is this part suitable for automotive applications per AEC-Q200?
No - BZX84C27S-7-F is not AEC-Q200 qualified. It is rated for operating temperatures from –65 °C to +150 °C, but lacks the stress testing, failure analysis, and qualification documentation required for automotive-grade use. For automotive designs, consider Diodes Inc.'s AEC-Q200 qualified AZ series Zeners.
How does the 625 °C/W thermal resistance affect PCB layout?
With 625 °C/W RθJA, dissipating 200 mW raises junction temperature by 125 °C above ambient. To stay within 150 °C max TJ, ambient must remain below 25 °C unless enhanced copper pour, thermal vias, or airflow is added - follow Diodes Inc.'s AP02001 recommended pad layout to achieve rated performance.
BZX84C27S-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):
- 27 V
- Tolerance:
- ±7.04%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 18.9 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-363
BZX84C27S-7-F FAQ
1.How can I place an order for BZX84C27S-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C27S-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 BZX84C27S-7-F reliable?
The price and inventory of BZX84C27S-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 BZX84C27S-7-F is usually 5 days.
3.What payment methods are accepted for BZX84C27S-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C27S-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C27S-7-F?
BZX84C27S-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C27S-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 BZX84C27S-7-F?
For technical support, including BZX84C27S-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C27S-7-F requirements.
6.How does Aetrix verify that BZX84C27S-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84C27S-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 BZX84C27S-7-F meets industry standards.
7.What is the process for return or replacement of BZX84C27S-7-F?
All BZX84C27S-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C27S-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 BZX84C27S-7-F part is unused and in its original packaging.
Return procedure for BZX84C27S-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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