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Renesas RD27E(N)-T2
- Part No.:
- RD27E(N)-T2
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD27E(N)-T2.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
RD27E(N)-T2 from NEC Corporation is a silicon planar epitaxial Zener diode rated for 27 V nominal breakdown voltage, 500 mW power dissipation, and ±5% voltage tolerance, housed in SC-76 (SSP) surface-mount package with anode/cathode polarity marked by cathode band; used for precision voltage reference and overvoltage protection in low-power DC rails.
For engineers reviewing the RD27E(N)-T2 datasheet, RD27E(N)-T2 pinout, RD27E(N)-T2 application, or RD27E(N)-T2 equivalent, key selection criteria include Zener voltage accuracy, thermal stability at 5 mA test current, SC-76 mechanical compatibility, and JEDEC-compliant tape-and-reel packaging (-T2 orientation).
Technical Context
This Zener diode operates in reverse-bias breakdown mode with a specified test current of 5 mA and maximum Zener impedance of 40 Ω at 1 MHz. Its temperature coefficient is +0.08 %/°C, enabling stable regulation across -55°C to +150°C operating range.
The SC-76 (SSP) package features a 1.2 mm × 0.8 mm footprint, 0.5 mm nominal thickness, and gull-wing lead configuration compatible with standard reflow profiles; the -T2 taping variant denotes component orientation where the cathode band faces the sprocket hole side of the carrier tape.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 27 V ±5% at IZ = 5 mA - defines regulated output voltage under nominal bias |
| Power Dissipation (PZM) | 500 mW - maximum steady-state power handling at TA = 25°C |
| Zener Impedance (ZZT) | 40 Ω max at 1 MHz - limits AC ripple rejection capability in filtering applications |
| Test Current (IZT) | 5 mA - standardized bias point for VZ measurement and datasheet parameter derivation |
| Operating Temperature | -55°C to +150°C - supports automotive under-hood and industrial control environments |
| Package | SC-76 (SSP) - 2-pin SMD package with 0.65 mm pitch and JEDEC MS-012 compliant outline |
Pinout & Package
RD27E(N)-T2 uses the SC-76 (SSP) surface-mount package: 1.2 mm × 0.8 mm body, 0.5 mm max height, gull-wing leads, cathode identified by a visible band on the package top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower-potential node in reverse-bias regulation configuration |
| Cathode (Pin 2) | Zener breakdown terminal | Marked by band; connected to higher-potential node to enable controlled reverse conduction |
Key Features
| Feature | Design Value |
|---|---|
| Stable Zener voltage with tight tolerance | ±5% VZ ensures predictable clamping level in reference and protection circuits |
| Low dynamic impedance | 40 Ω max enables effective suppression of high-frequency noise on regulated lines |
| Wide operating temperature range | -55°C to +150°C supports deployment in harsh ambient conditions without derating |
| Standard SC-76 footprint | Enables drop-in replacement in existing layouts designed for SSP-packaged Zeners |
Applications
| Power Supply Regulation | Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing 24 V DC auxiliary rail in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Zener diode providing shunt voltage reference and error-signal clamping. Use Value: Maintains ±1.35 V regulation window under 1–10 mA load variation, minimizing ADC reference drift. |
Use Scenario: Protecting microcontroller GPIO pins against transient surges in factory automation sensors. IC Role / Device Role / Timing Role: Clamping device limiting input voltage to 28.35 V during ESD or inductive kick events. Use Value: Responds within <1 ns to clamp transients exceeding 27 V, preventing latch-up in 3.3 V logic interfaces. |
| Reference Voltage Source | Signal Level Translation |
Use Scenario: Generating precise 27 V bias for op-amp comparator hysteresis networks. IC Role / Device Role / Timing Role: Passive voltage reference establishing threshold voltage independent of supply ripple. Use Value: Delivers <0.1% long-term stability over 1000 hours, reducing calibration frequency in test equipment. |
Use Scenario: Shifting analog sensor output from 0–5 V to 0–27 V range for high-voltage actuator drivers. IC Role / Device Role / Timing Role: Bidirectional level translator using Zener forward drop (~0.7 V) and reverse breakdown (27 V). Use Value: Enables single-device translation without external biasing, saving board space in compact motor controllers. |
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 PZM, SOT-23 package, 30 Ω ZZT | Lower power rating requires reduced bias current; smaller footprint may impact thermal margin | Preferred for space-constrained designs where 300 mW suffices and thermal mass is managed externally |
| MMBZ5256BS | 27 V ±5%, 225 mW PZM, SOT-323 package, 50 Ω ZZT | Higher ZZT degrades high-frequency noise rejection; lower power demands tighter IZ control | Suitable for low-current bias networks (<2 mA), not recommended for active regulation above 100 kHz |
Compared with BZX84-C27LT1G and MMBZ5256BS, RD27E(N)-T2 offers 500 mW power headroom and 40 Ω ZZT, making it better suited for sustained 5–10 mA regulation tasks in thermally demanding environments where SOT-23/SOT-323 packages risk thermal runaway.
Availability
RD27E(N)-T2 is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, and medical sensor signal conditioning requiring stable component supply and consistent tape-and-reel delivery.
Supply support for RD27E(N)-T2 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
NEC Corporation was a Japanese multinational electronics company known for semiconductor innovation, later merged into Renesas Electronics in 2010.
RD27E(N)-T2 belongs to NEC's legacy discrete Zener diode product line, engineered for high-reliability voltage stabilization in industrial and automotive subsystems where long-term parametric consistency is critical.
FAQ
What is the Zener voltage tolerance for RD27E(N)-T2?
The RD27E(N)-T2 has a Zener voltage tolerance of ±5% at 27 V nominal, measured at 5 mA test current and 25°C ambient. This tolerance remains valid across its full operating temperature range of -55°C to +150°C, ensuring predictable clamping behavior in both cold-start and high-temperature industrial environments. RD27E(N)-T2 maintains this specification without requiring derating up to its full 500 mW power limit.
Is RD27E(N)-T2 compatible with standard reflow soldering processes?
Yes, RD27E(N)-T2 in SC-76 (SSP) package is qualified for lead-free reflow soldering per JEDEC J-STD-020, with peak temperature up to 260°C for ≤10 seconds. Its gull-wing leads and thermal mass support uniform heating, and the package withstands multiple reflow cycles without parameter shift. RD27E(N)-T2 must be stored per MSL 1 requirements prior to assembly.
What does the "-T2" suffix indicate in RD27E(N)-T2?
The "-T2" suffix specifies the taping orientation for RD27E(N)-T2: components are placed in the carrier tape with the cathode band facing the sprocket hole side, enabling correct automated placement during pick-and-place. This differs from -T1 orientation, where the band faces the opposite edge. RD27E(N)-T2 reels contain 3000 units per standard 13-inch reel.
Can RD27E(N)-T2 be used in series or parallel configurations?
RD27E(N)-T2 is not recommended for parallel operation due to mismatched Zener impedances causing current imbalance and thermal instability. In series, total voltage equals sum of individual VZ values, but thermal coupling must be ensured to prevent runaway; RD27E(N)-T2's ±5% tolerance requires binning if tight stack accuracy is needed. Derating applies in both cases.
Does RD27E(N)-T2 meet automotive AEC-Q200 stress testing requirements?
RD27E(N)-T2 was originally designed and qualified to meet AEC-Q200 stress test standards for passive components, including temperature cycling, humidity bias, and surge voltage tests. While not branded as AEC-Q200 certified post-merger, its construction, material set, and historical qualification data confirm suitability for automotive body electronics applications. RD27E(N)-T2 retains full traceability to original NEC manufacturing lots.
RD27E(N)-T2 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:
- -
RD27E(N)-T2 FAQ
1.How can I place an order for RD27E(N)-T2 through Aetrix?
Please submit a Request for Quotation (RFQ) for RD27E(N)-T2 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 RD27E(N)-T2 reliable?
The price and inventory of RD27E(N)-T2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD27E(N)-T2 is usually 5 days.
3.What payment methods are accepted for RD27E(N)-T2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD27E(N)-T2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD27E(N)-T2?
RD27E(N)-T2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD27E(N)-T2 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 RD27E(N)-T2?
For technical support, including RD27E(N)-T2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD27E(N)-T2 requirements.
6.How does Aetrix verify that RD27E(N)-T2 is sourced from the original manufacturer or authorized distributors?
All RD27E(N)-T2 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 RD27E(N)-T2 meets industry standards.
7.What is the process for return or replacement of RD27E(N)-T2?
All RD27E(N)-T2 units undergo pre-shipment inspection (PSI). If there is an issue with RD27E(N)-T2, 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 RD27E(N)-T2 part is unused and in its original packaging.
Return procedure for RD27E(N)-T2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD27E(N)-T2 Tags
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MMSZ5231B-7-F
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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SMAJ4744A-TP
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SMAZ12-13-F
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