2036-47-B Alternative / Cross Reference – SMD 470V GDT for Telecom Protection | YINT

YINT Electronics — Gas Discharge Tube (GDT)

Target Keywords: 2036-47-B alternative, 2036-47-B equivalent, 2036-47-B replacement, Bourns 2036-47-B cross reference, SMD GDT 470V, SMD1812-471

SEMrush Data: "gas discharge tube" — 2,400/mo US · KD 29%

1. Introduction

The Bourns 2036-47-B is a surface-mount gas discharge tube (GDT) with a 470V DC breakdown voltage. It protects telecom, data transmission, and industrial communication equipment from lightning-induced surges and power cross faults. The device comes in a standard SMD 1812 package and handles up to 2kA impulse discharge current. Its ultra-low sub-1pF capacitance makes it suitable for high-speed data line protection where signal integrity matters.

Gas discharge tubes work by ionizing the internal gas when the voltage across the electrodes exceeds the spark-over threshold. Once triggered, the GDT conducts current with low impedance until the fault clears, then self-extinguishes. This makes the 2036-47-B an ideal primary protector for telecom and data equipment exposed to outdoor cabling and lightning-prone environments. The 470V DC breakdown rating matches the protection requirements for 48V telecom buses and similar communication interfaces.

YINT Electronics offers the SMD1812-471 as a direct 2036-47-B alternative. It matches the same electrical parameters — 470V DC breakdown, 300V impulse spark-over, 2kA surge capability, and 0.5pF capacitance — in an identical SMD 1812 footprint. Engineers looking for a 2036-47-B replacement can use the YINT SMD1812-471 as a drop-in equivalent without any PCB layout changes. The YINT part uses the same two-electrode gas discharge construction and delivers identical surge protection performance.

The 2036-47-B is widely used in telecom line protection, base station surge suppression, and industrial RS-485/RS-232 interface protection. YINT's SMD1812-471 delivers the same protection level with short lead times and competitive pricing for both prototyping and production volumes. Every device undergoes 100% electrical testing to guarantee spec compliance.

2. Product Overview

The Bourns 2036 series is a popular family of two-electrode SMD GDTs available in an 1812 package. The 2036-47-B is the 470V rated variant designed for telecom and data communication applications where reliable surge clamping and low capacitance are critical. Its sub-1pF capacitance ensures minimal signal degradation on high-speed data lines running at gigabit data rates.

YINT's SMD1812-471 is a pin-to-pin compatible 2036-47-B cross reference. It uses proven gas discharge technology with strict process controls for consistent breakdown voltage and impulse current capability across every production lot. The device transitions from a high-impedance state to a low-impedance arc within microseconds when a transient overvoltage exceeds the spark-over threshold, safely shunting surge current to ground. After the transient passes, the GDT extinguishes and returns to its high-impedance state automatically. This self-restoring behavior makes GDTs ideal for applications that experience repeated surge events over the product lifetime.

YINT produces the full SMD1812 GDT series from 90V to 800V breakdown ratings. This complete voltage coverage lets customers source all SMD 1812 GDT needs from one manufacturing partner, simplifying supply chain management and reducing qualification costs. With 19+ years of circuit protection manufacturing experience, YINT delivers reliable overvoltage protection components for global customers in telecom, industrial, medical, and renewable energy applications. YINT's manufacturing process includes 100% electrical parameter testing on every device for guaranteed performance.

3. Key Features

• DC Breakdown Voltage: 470V — Standard 470V rating for telecom and industrial protection
• Impulse Spark-over: 300V — 1kV/μs fast response to transient events
• Impulse Discharge Current: 2kA — 8/20μs waveform, 10 hits capability
• Capacitance: 0.5pF — Ultra-low capacitance for high-speed data line protection
• SMD 1812 Package — Compact surface-mount footprint for automated assembly
• Bidirectional Protection — Symmetrical DC spark-over for AC and DC circuits
• RoHS Compliant — Lead-free and environmentally friendly
• Tape & Reel Packaging — 2,500 pieces per reel for production use
• Drop-in Replacement — Pin-to-pin compatible with Bourns 2036-47-B

4. Specifications

5. Cross Reference

The 2036-47-B is a standard SMD GDT number used by several protection component manufacturers. YINT's SMD1812-471 is a direct cross-reference replacement with identical electrical specifications and footprint. Engineers searching for a 2036-47-B equivalent can confidently choose YINT as a universal alternative. All parts listed below share the same SMD 1812 package and similar 470V DC breakdown rating, making the YINT SMD1812-471 a suitable drop-in replacement for each.

6. Comparison with Similar Models

Engineers often compare the Bourns 2036-47-B with nearby voltage variants and competitor equivalents. The table below shows key differences to help select the right 2036-47-B replacement for each design.

The YINT SMD1812-471 and Bourns 2036-47-B have identical 470V DC breakdown, 300V impulse spark-over, and 2kA discharge current ratings in the same SMD 1812 package. The only difference is YINT's tighter capacitance specification of 0.5pF compared to the Bourns <1.0pF typical range. For applications requiring higher breakdown voltage, the SMD1812-601 (600V) offers an upgrade path in the same package footprint. The Bourns 2036-42-B (420V) is a lower-voltage variant within the same series — use it when the protected line operates below 420V DC. The Littelfuse CG470 is a direct competitor with identical 470V rating and 2kA surge capability in the same footprint. All these parts are surface-mount compatible and suitable for automated PCB assembly using standard reflow soldering profiles. When selecting a replacement, verify the DC breakdown tolerance required for your specific application. The YINT SMD1812-471 provides the same protection performance as the 2036-47-B with the advantage of a tightly specified 0.5pF capacitance that gives designers a clearer limit for high-speed signal integrity calculations.

7. Applications

• Telecom line interface primary protection per ITU-T K.20/K.21 and IEC 61000-4-5
• Base station and wireless communication equipment surge suppression
• RS-485, RS-232, and RS-422 serial data line protection
• Ethernet and PoE port lightning surge protection
• CCTV and security camera power and signal line protection
• Industrial control and automation system I/O module protection
• Broadband and xDSL line card transient protection
• Medical equipment power and signal surge protection (non-patient connected)
• Outdoor LED lighting surge suppression
• Renewable energy monitoring and communication interface protection
• Building management and HVAC system communication line protection
• Fire alarm and security system signal line transient clamping

8. Why Choose YINT

• 19+ years of manufacturing expertise in circuit protection components since 2006
• 40+ patents and certifications with robust process control per industry standards
• Global sales network serving North America, Europe, Asia, and Latin America
• Full SMD1812 GDT series from 90V to 800V for one-stop sourcing across all ratings
• Direct drop-in replacement for Bourns 2036-47-B without any PCB redesign required
• Engineering team available for application assistance and cross-reference verification
• Free samples for testing and qualification upon request
• Direct manufacturer pricing with volume discounts available
• Short lead times with consistent production quality across all batches

9. Ordering Information

10. FAQ

Q1: Is YINT SMD1812-471 a direct replacement for Bourns 2036-47-B?
A: Yes. The YINT SMD1812-471 has identical 470V DC breakdown, 300V spark-over, and 2kA surge ratings in the same SMD 1812 package. It drops in without any PCB redesign and uses the same two-electrode GDT construction.

Q2: What is the difference between Bourns 2036-47-B and 2036-42-B?
A: The 2036-47-B has a 470V DC breakdown voltage, while the 2036-42-B is a 420V variant. Both use the same SMD 1812 package and 2kA discharge current rating.

Q3: What is the capacitance of SMD1812-471?
A: 0.5pF at 1MHz. This ultra-low capacitance is ideal for high-speed data line protection without signal degradation.

Q4: Can SMD1812-471 replace Littelfuse CG470?
A: Yes. The CG470 has the same 470V DC breakdown and 2kA surge rating in an SMD 1812 package. YINT SMD1812-471 is a direct cross reference.

Q5: What is the impulse discharge current rating?
A: 2.0kA for the 8/20μs waveform, 10 hits. This is sufficient for telecom line primary protection per ITU-T K.20.

Q6: What packaging options are available?
A: Standard tape and reel packaging with 2,500 pieces per reel. Bulk packaging is also available on request. Contact YINT for custom packaging needs.

11. Conclusion

YINT Electronics' SMD1812-471 is a reliable, high-performance 2036-47-B alternative for telecom and industrial surge protection. It delivers 470V DC breakdown, 300V impulse spark-over, and 2kA surge capability in a compact SMD 1812 package with ultra-low 0.5pF capacitance.

Contact YINT Electronics at global@yint.com.cn for datasheets, samples, or pricing. Our engineering team is ready to assist with cross-references and application support.