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Renesas RKZ27BKG#P1
- Part No.:
- RKZ27BKG#P1
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RKZ27BKG#P1.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:57,000
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Product details
Overview
RKZ27BKG#P1 from Renesas Electronics is a silicon planar Zener diode designed for surge absorption and voltage stabilization in low-power signal and bias circuits. It delivers a nominal Zener voltage of 27 V (min 25.1 V, max 28.9 V) at 2 mA test current, with dynamic resistance of 70 Ω and reverse current ≤2 μA at 21 V, housed in an ultra-small URP (SC-76A) surface-mount package.
For engineers reviewing the RKZ27BKG#P1 datasheet, RKZ27BKG#P1 pinout, RKZ27BKG#P1 application, or RKZ27BKG#P1 equivalent, this device serves as a compact, halogen-free, Pb-free voltage reference and transient suppressor in space-constrained industrial sensor interfaces, power supply feedback paths, and I/O protection circuits requiring stable 27 V regulation under low-current conditions.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a stable reference voltage across its terminals. Its 27 V nominal Zener voltage exhibits a positive temperature coefficient above ~5.6 V, confirmed by characteristic curves showing +0.04 %/°C typical drift near 27 V.
The device is rated for 200 mW power dissipation on PCB, with junction temperature limited to 150 °C and storage range from –55 to +150 °C. It meets IEC 61000-4-2 ESD immunity up to ±15 kV (contact) per JEDEC JESD22-A114 - validated at 2 kV per specification note.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 25.1–28.9 V at IZ = 2 mA - defines stable regulation window for precision 27 V reference applications |
| Dynamic Resistance (rd) | 70 Ω max at IZ = 2 mA - determines output impedance and load regulation sensitivity |
| Reverse Current (IR) | ≤2 μA at VR = 21 V - ensures minimal leakage in standby or high-impedance bias networks |
| Power Dissipation (Pd) | 200 mW at Ta = 25 °C on PCB - sets maximum continuous DC or pulsed power handling capability |
| ESD Capability | ±15 kV (IEC 61000-4-2, contact discharge) - provides robust electrostatic immunity for board-level I/O protection |
| Junction Temperature (Tj) | 150 °C max - constrains thermal design margin for reliability in enclosed or high-ambient environments |
Pinout & Package
Package: Ultra-small Resin Package (URP), JEITA code SC-76A, Renesas code PTSP0002ZA-A, dimensions 1.25 × 0.80 × 0.45 mm (L × W × H), mass 0.004 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to higher-potential node in reverse-bias configuration; carries Zener current during regulation |
| 2 | Anode | Connected to lower-potential node (typically ground or return); completes bias path for breakdown operation |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free & Pb-free construction | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level (MSL) 1 - enables lead-free reflow assembly without exemptions |
| Ultra-small URP package | 1.25 mm × 0.80 mm footprint - supports ≥0.3 mm pitch routing and >10,000 units/in² board density in portable and IoT sensor modules |
| Stable 27 V Zener reference | ±7% tolerance (25.1–28.9 V) at 2 mA - suitable for non-critical voltage clamping and coarse feedback in DC-DC converters |
| High ESD robustness | ±15 kV contact discharge per IEC 61000-4-2 - eliminates need for external TVS in Class A/B industrial I/O protection |
Applications
| Industrial Sensor Signal Conditioning | Low-Power Microcontroller Reset Circuit |
|---|---|
|
Use Scenario: Stabilizing reference voltage for analog front-end amplifiers in 4–20 mA loop-powered pressure transmitters. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage regulator to maintain fixed 27 V rail for op-amp biasing and ADC reference scaling. Use Value: Enables accurate 12-bit measurement resolution despite ±10% supply variation, leveraging 70 Ω dynamic resistance for <0.5% line regulation error. |
Use Scenario: Generating clean reset threshold for 3.3 V microcontrollers in battery-backed smart meters. IC Role / Device Role / Timing Role: Zener-based voltage divider feeding comparator input to trigger reset when main 27 V backup rail drops below 24 V. Use Value: Provides deterministic 27 V reference with ≤2 μA leakage, extending battery life beyond 10 years in always-on monitoring mode. |
| RS-485 Transceiver Bus Protection | Optocoupler Input Bias Network |
|
Use Scenario: Clamping common-mode surges on differential RS-485 bus lines in factory automation gateways. IC Role / Device Role / Timing Role: Bidirectional ESD suppressor placed between A/B lines and ground, leveraging ±15 kV IEC 61000-4-2 rating. Use Value: Absorbs 100 A/10 ns surge pulses without degradation, maintaining signal integrity up to 10 Mbps while eliminating discrete TVS diodes. |
Use Scenario: Setting forward current for PC817-series optocouplers in isolated AC mains detection circuits. IC Role / Device Role / Timing Role: Zener-stabilized current source delivering 5 mA through LED anode via series resistor and RKZ27BKG#P1 cathode clamp. Use Value: Ensures consistent CTR over temperature (–40 to +85 °C) by fixing LED voltage drop at 27 V, reducing photocurrent variation to <±3%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C27LT1G | 27 V ±5%, 300 mW Pd, SOT-23 package (2.9 × 1.3 mm) | Larger footprint; higher power but less ESD robustness (±8 kV) | Preferred where higher surge energy handling is required and board space permits larger package |
| MMSZ5256ET1G | 27 V ±5%, 500 mW Pd, SOD-123 package (3.7 × 1.6 mm) | Higher power rating but no specified IEC 61000-4-2 ESD rating | Chosen when thermal margin is critical and ESD compliance is managed at system level |
Compared with BZX84-C27LT1G and MMSZ5256ET1G, RKZ27BKG#P1 offers superior ESD immunity (±15 kV vs. ≤±8 kV) and smallest footprint (1.25 × 0.80 mm), making it optimal for miniaturized industrial I/O modules where layout area and board-level ESD robustness are primary constraints.
Availability
RKZ27BKG#P1 is available at Aetrix Electronics and suitable for industrial sensor interfaces, RS-485 communication protection, and low-power microcontroller reset circuits requiring stable component supply, full traceability, and RoHS-compliant sourcing.
Supply support for RKZ27BKG#P1 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
Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and infrastructure markets.
RKZ27BKG#P1 belongs to the RKZ-KG Series of silicon planar Zener diodes engineered specifically for compact, high-density surge absorption and voltage stabilization in industrial control and sensor signal conditioning systems.
FAQ
What is the Zener voltage tolerance of RKZ27BKG#P1?
The RKZ27BKG#P1 has a Zener voltage range of 25.1 V to 28.9 V at IZ = 2 mA, representing a ±7% tolerance around the nominal 27 V rating. This tolerance is verified per Renesas datasheet REJ03G1512-0300 Rev.3.00 and applies strictly under the stated test condition - not extrapolated to other currents or temperatures.
Does RKZ27BKG#P1 support lead-free reflow soldering?
Yes, RKZ27BKG#P1 is halogen-free and Pb-free, compliant with RoHS Directive 2011/65/EU. Its URP package is qualified for standard lead-free reflow profiles (peak temperature ≤260 °C, per JEDEC J-STD-020), with MSL Level 1 rating ensuring unlimited floor life at ≤30 °C/60% RH.
What is the maximum reverse current specification for RKZ27BKG#P1?
The maximum reverse current (IR) for RKZ27BKG#P1 is 2 μA at VR = 21 V, measured at Ta = 25 °C. This value is specified in the Electrical Characteristics table of the official Renesas datasheet and reflects leakage performance critical for low-power bias networks.
Can RKZ27BKG#P1 be used for ESD protection in USB or CAN interfaces?
RKZ27BKG#P1 is rated for ±15 kV IEC 61000-4-2 contact discharge, making it suitable for board-level ESD protection on low-speed signal lines such as RS-485 or GPIOs. However, it is not recommended for USB 2.0 or CAN FD interfaces due to insufficient clamping speed and lack of specified CJ or Tr parameters - dedicated TVS arrays remain appropriate for those protocols.
What is the thermal derating behavior of RKZ27BKG#P1 above 25 °C?
RKZ27BKG#P1 follows linear thermal derating: power dissipation decreases from 200 mW at 25 °C ambient to zero at 150 °C junction temperature. The derating slope is –2.22 mW/°C, calculated from the 200 mW rating and 125 °C usable ambient range (150 °C – 25 °C), as shown in Figure 3 of the Renesas datasheet.
RKZ27BKG#P1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
RKZ27BKG#P1 FAQ
1.How can I place an order for RKZ27BKG#P1 through Aetrix?
Please submit a Request for Quotation (RFQ) for RKZ27BKG#P1 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 RKZ27BKG#P1 reliable?
The price and inventory of RKZ27BKG#P1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RKZ27BKG#P1 is usually 5 days.
3.What payment methods are accepted for RKZ27BKG#P1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RKZ27BKG#P1 transactions.
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4.How is shipping managed for RKZ27BKG#P1?
RKZ27BKG#P1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RKZ27BKG#P1 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 RKZ27BKG#P1?
For technical support, including RKZ27BKG#P1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RKZ27BKG#P1 requirements.
6.How does Aetrix verify that RKZ27BKG#P1 is sourced from the original manufacturer or authorized distributors?
All RKZ27BKG#P1 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 RKZ27BKG#P1 meets industry standards.
7.What is the process for return or replacement of RKZ27BKG#P1?
All RKZ27BKG#P1 units undergo pre-shipment inspection (PSI). If there is an issue with RKZ27BKG#P1, 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 RKZ27BKG#P1 part is unused and in its original packaging.
Return procedure for RKZ27BKG#P1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RKZ27BKG#P1 Tags
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