DC Surge Protector Manufacturer
& Wholesale Supplier
DC surge protector & DC surge protection device (DC SPD) — Type 1+2 & Type 2, IEC 61643-31 CE certified ECM Italy. 600V / 1000V / 1500V DC Ucpv. Solar PV string combiners, BESS, EV DC fast chargers & industrial DC systems. Factory-direct wholesale. Part of the TrilPeak SPD range →
DC Surge Protector Range — IEC 61643-31 Type 1+2 & Type 2
IEC 61643-31 defines two DC SPD types. Choose by site lightning exposure. Selection guide →
Type 2 DC Surge Protector — TPK-40-PV Series | 40kA Imax
The most widely specified photovoltaic surge protector. For commercial PV, BESS, EV DC fast chargers, VFD DC bus and telecom −48V systems. Clamps induced surges (8/20µs, Imax 40kA). Pluggable DIN rail — hot-swap in 30 s without system shutdown.
Type 1+2 DC Surge Protector — TPK-7-PV | 7kA Iimp
For open-field solar farms, mountainous / coastal sites, or grid-connected PV with external LPS per IEC 62305. Direct lightning (10/350µs, 7kA Iimp) + induced surges (8/20µs, 50kA Imax) in a single unit. When uncertain about site risk — always specify Type 1+2.
Which DC SPD for Your System?
DC SPD Installation in Solar PV Systems — IEC 61643-32
DC SPDs must be installed at the string combiner box (mandatory) and at the inverter DC input (recommended). Lead ≤ 0.5m total. Use DC-rated gPV fuse only.
or Type 1+2
IEC 61643-32 mandatory. Type 2 DC for standard sites; Type 1+2 for open-field, high lightning-risk or external LPS per IEC 62305.
Recommended for high-value inverters, long DC runs (>10m) and high-exposure outdoor environments. Type 2 DC only.
Each extra 1m adds ~1kV let-through. Use gPV fuse (IEC 60269-6) — never AC gG/gL fuses on DC circuits.
DC Surge Protector vs AC Surge Protector — Key Technical Differences
DC current has no zero-crossing — a DC arc persists indefinitely once struck, melts SPD internals and creates fire risk. DC surge protectors (IEC 61643-31) use active arc-quenching technology rated for continuous high-voltage DC. They are never interchangeable with AC surge protectors (IEC 61643-11).
| Parameter | AC SPD | DC SPD | Standard | Key Param |
|---|---|---|---|---|
| Arc quench | Zero-crossing (passive) | Active suppression | IEC 61643-31 | Ucpv |
| Type 1+2 DC | — | 10/350µs + 8/20µs | IEC 61643-31 | Iimp+Imax |
| Type 2 DC | — | 8/20µs induced surge | IEC 61643-31 | Imax |
| Voltage | 230V / 400V AC | 600 / 1000 / 1500V DC | IEC 61643-31 | Ucpv |
AC SPDs have no arc-quench mechanism for DC. A DC arc at 1000V+ will persist, overheat and destroy the SPD. IEC 61643-31 mandates DC-specific design and testing. AC SPD →
Ucpv ≥ 1.2× PV system open-circuit voltage (Voc). 1000V system: Ucpv ≥ 1200V. Undersizing causes premature SPD failure under normal DC operating voltage. SPD Selector →
IEC 61643-32 §4.3 requires DC SPD installation at the string combiner box. Omitting DC SPD voids most inverter warranties. NEC 690 (USA) and EN 50539-11 (EU) also mandate. PV Guide →
DC Surge Protector Selection Guide — Ucpv, Type & Application
Key formula: Ucpv (MCOV) ≥ 1.2 × open-circuit voltage (Voc). Select Type 1+2 DC SPD for open-field & high lightning-risk sites; Type 2 DC SPD for standard commercial solar PV, BESS and EV charger installations per IEC 61643-32.
| DC System & Application | System Voc | Recommended Model | Min. Ucpv | Min. kA | Type |
|---|---|---|---|---|---|
| Solar PV — Commercial Rooftop | ≤600V DC | TPK-40-PV600 | 720V | 40kA | Type 2 |
| Solar PV — 1000V System | ≤1000V DC | TPK-40-PV1000 | 1200V | 40kA | Type 2 |
| Solar PV — 1500V Utility Scale | ≤1500V DC | TPK-40-PV1500 | 1800V | 40kA | Type 2 |
| Open-Field PV — High Lightning Risk | 500V–1500V DC | TPK-7-PV | Voc × 1.2 | 7kA Iimp | Type 1+2 |
| BESS — Battery Energy Storage | 48V–800V DC | TPK-40-DC | Per system | 40kA | Type 2 |
| EV DC Fast Charger (CCS / CHAdeMO) | 200V–1000V DC | TPK-40-PV | Per system | 40kA | Type 2 |
| Telecom −48V DC Bus | −48V DC | TPK-40-DC48 | 65V | 40kA | Type 2 |
| Industrial VFD DC Bus | 24V–220V DC | TPK-40-DC | Per system | 40kA | Type 2 |
Get DC SPD Wholesale Price
Send system Voc, type, quantity & destination. Factory-direct DC SPD wholesale price with IEC 61643-31 CE docs within 24h. Factory →
Solar Project & PV Combiner Box Supply
Multi-MW solar project supply with consistent batch quality. Compatible with all major PV combiner box formats. SGS / BV / Intertek accepted.
IEC 61643-31 CE Docs for Project Commissioning
Type test report, CE certificate, EU DoC, English datasheet & wiring diagram — required for solar project handover and EU customs. Delivered within 24h. CE certs →
DC Surge Protector Applications — Solar PV, BESS, EV & Industrial DC
TrilPeak DC SPDs protect critical DC infrastructure across energy, transport and industry.
Solar PV
Solar PV Surge Protection — String Combiner Box & Inverter DC Input
- PV string combiners — 500V to 1500V DC
- String & central inverter DC input
- Rooftop, ground-mount & floating PV
- Utility-scale & distributed generation
BESS
BESS Battery Storage DC Surge Protection
- Battery string DC bus — 48V to 800V
- Grid-tied & off-grid BESS systems
- Container & utility-scale storage
- Residential & C&I battery storage
EV Charging
EV Charger DC SPD — CCS / CHAdeMO Fast Charging Infrastructure
- DC fast charger power modules
- High-power charging infrastructure
- On-route & depot charging stations
- Outdoor EV charging equipment
Industrial DC
Industrial VFD DC Bus & Motor Drive Surge Protection
- VFD DC bus protection — 24V to 800V
- DC motor drives & servo systems
- PLC & control power supply DC rails
- Manufacturing automation DC circuits
Telecom DC
Telecom −48V DC Surge Protector & Data Centre UPS DC Bus
- −48V DC power distribution systems
- Data centre UPS DC bus protection
- Telecom base station power
- Remote site off-grid DC systems
Railway DC
Railway & Traction DC Surge Protection — 750V / 1500V
- DC traction power systems — 750V / 1500V
- Trackside signalling & control equipment
- Station platform & depot power
- Custom ratings available on request
DC Surge Protector Technical Guides — Solar PV, BESS & IEC 61643-31
Essential reading for solar EPC engineers, BESS integrators & distributors specifying DC SPDs. Browse all FAQs →
IEC 61643-31 Type 1+2 vs Type 2 selection, Ucpv calculation, string combiner installation and IEC 61643-32 mandatory requirements.
Read Guide →
Where to install DC SPD in solar PV combiner box, lead length rules (≤0.5m), gPV fuse sizing and IEC 61643-32 mandatory positions.
Read Guide →
DC SPD selection for CCS and CHAdeMO fast chargers, 200V–1000V DC protection levels, and installation best practices.
Read Guide →Why Solar EPC Contractors & Distributors Specify TrilPeak DC SPDs
TrilPeak manufactures DC surge protectors end-to-end — in-house MOV varistor production, 100% per-unit electrical testing, and IEC 61643-31 CE certification from ECM Italy (EU notified body). Factory-direct pricing to solar EPC contractors, distributors & BESS integrators in 50+ countries. Not a trading company.
IEC 61643-31 CE Certified — ECM Italy, Not Self-Declared
CE certificates issued by ECM Italy (EU notified body) to IEC 61643-31. Required for solar project commissioning reports, EU customs clearance, and EPC handover packages. Delivered within 24h of order.
In-House MOV & 1500V DC Arc Chamber Production
In-house MOV varistor and DC arc chamber production controls the core DC SPD components. Critical for maintaining stable Ucpv ratings and arc suppression performance in outdoor 1500V DC solar environments.
Complete Documentation for Solar Project Commissioning
Every DC SPD order includes: IEC 61643-31 type test report, CE certificate, EU DoC, English datasheet & wiring diagram. Required for solar EPC handover packages and EU customs clearance — all within 24h.
Factory-Direct to Solar EPC & Distributors — No Markup
Direct factory pricing eliminates distributor markup. Consistent batch quality for multi-MW solar project supply. Private label with EU DoC in your company name. MOQ negotiable, NDA standard, territory exclusivity available.
IEC 61643-31 CE certificates, EU DoC, and type test reports within 24h. Accepted for solar project commissioning and EU customs in 50+ countries.
Custom DC Surge Protector Manufacturing & Private Label — IEC 61643-31
TrilPeak supports four cooperation models for solar distributors and electrical brands. IEC 61643-31 CE certification transfers to your brand, EU DoC issued in your company name. OEM programme →
Your Brand on IEC 61643-31 Certified DC SPDs
- Custom logo & brand on product
- Branded packaging & design support
- IEC 61643-31 certified production
- EU DoC in your company name
- Flexible MOQ — negotiable
- NDA as standard
Custom DC SPD Voltage & Housing
- Non-standard Ucpv voltage ratings
- Custom housing & enclosure design
- Modified terminal layout
- Bespoke connector types
- IEC 61643-31 re-certification support
- 48h sample lead time confirmation
White-Label Solar DC SPD Supply
- Full white-label DC SPD supply
- Your brand on all CE documentation
- Territory exclusivity available
- Marketing material support
- Technical training included
- Ongoing product development
DC SPD Components for Local Assembly
- Component supply for local assembly
- Reduced import duty benefit
- TrilPeak components & sub-assemblies
- Technical assembly guidance
- Quality assurance support
- Scalable volume pricing
DC Surge Protector FAQ — Solar PV, IEC 61643-31 & Selection Guide
What is a DC surge protector and why can't I use an AC SPD?
A DC surge protector (DC SPD) is designed specifically for DC electrical systems where AC SPDs will fail. AC SPDs rely on the 50/60Hz zero-crossing to extinguish internal arcs — DC current has no zero-crossing, so an arc inside an AC SPD on a DC circuit persists indefinitely and causes catastrophic failure, fire risk, and complete loss of protection. Always specify IEC 61643-31 certified DC SPDs for DC systems. AC SPD →
When do I need Type 1+2 DC SPD vs Type 2 DC SPD?
Use Type 1+2 DC SPD (Iimp 7kA, 10/350µs) for: open-field solar farms, rooftop PV in high lightning-risk zones, mountainous or coastal areas, or any site with an external lightning protection system (LPS). Use Type 2 DC SPD (Imax 40kA, 8/20µs) for: standard commercial rooftop, urban industrial, and lower lightning-risk installations. When uncertain, Type 1+2 provides complete protection. Solar guide →
How do I calculate the correct Ucpv (MCOV) for my solar PV system?
Ucpv ≥ 1.2 × system open-circuit voltage (Voc). For 600V PV: Ucpv ≥ 720V. For 1000V PV: Ucpv ≥ 1200V. For 1500V utility-scale: Ucpv ≥ 1800V. In cold climates, Voc rises above nameplate — always use worst-case cold-temperature Voc. Wrong Ucpv means the DC SPD will operate continuously in degradation mode and fail prematurely. TrilPeak TPK-40-PV covers: 500V / 600V / 800V / 1000V / 1200V / 1500V Ucpv. SPD Selector →
Is DC surge protection mandatory for solar PV systems?
Yes. IEC 61643-32 states: "DC surge protective devices shall be installed unless a risk assessment justifies otherwise." Regional mandates: NEC 690 (USA), IEC 62548 (international), EN 50539-11 (Europe). Omitting DC SPDs voids most inverter warranties and insurance claims after lightning damage. The inverter replacement cost ($2,000–$50,000+) far exceeds the DC SPD cost ($30–$100).
Where should I install a DC surge protector in a PV combiner box?
Per IEC 61643-32: install at the string combiner box (primary position — between PV strings and inverter DC cable), and optionally at the inverter DC input terminals. Critical rules: total lead length (DC+ + DC− + PE) ≤ 0.5m; connect in parallel to the DC circuit; install a DC-rated gPV fuse (IEC 60269-6) in series on the supply side. Never use AC fuses — they are not rated for DC arc interruption. Combiner box guide →
What backup fuse does a DC surge protector require?
All DC SPDs require DC-rated backup protection for short-circuit fault. Use gPV-type fuses (IEC 60269-6) rated for the full system DC voltage. Standard AC fuses (gG/gL type) must never be used on DC circuits — their AC arc-interruption mechanism fails on DC, creating fire risk. Size the gPV fuse per the manufacturer's datasheet for the specific Imax rating. Coordination guide →
How long does a DC surge protector last in a PV system?
Lifespan depends on surge frequency and energy. Check the status indicator monthly: green = operational, red = replace module. After direct lightning strike events, inspect all DC SPDs regardless of indicator status — cumulative energy absorption accelerates MOV degradation. TrilPeak's pluggable module design enables 30-second hot-swap replacement without shutting down the PV array, minimising energy yield loss. Replacement guide →
Can TrilPeak supply DC surge protectors for solar project wholesale?
Yes. TrilPeak supplies DC SPDs factory-direct to solar EPC contractors, electrical distributors, BESS integrators & EV infrastructure builders across 50+ countries. IEC 61643-31 type test report, CE certificate, EU DoC, English datasheet & wiring diagram included as standard. Private label with EU DoC in your company name. MOQ negotiable, quote and full documentation within 24h. Private label →
Request DC Surge Protector Wholesale Pricing & CE Documentation
Share your DC system specs — Ucpv voltage, Type 1+2 or Type 2, Imax/Iimp, quantity & destination — and receive factory-direct wholesale price + full IEC 61643-31 CE documentation within 24 hours.